AT&T PC 6300 Service Manual Download Page 382

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Summary of Contents for PC 6300

Page 1: ...n n n n H n n n n n fi n a PERSONAL COMPUTERS PC 6300 T231 Service Manual AT T Information Systems SERVICES DIVISION EDUCATION v i...

Page 2: ...n n n fi D n n D n n n n n n n n...

Page 3: ...5 Motherboard 2 9 CPU and DMA Circuitry 2 15 Memory 2 16 Input Output Peripheral Interfaces 2 18 Input Output Connectors 2 22 Motherboard Component Layout 2 25 Display Controllers 2 27 Bus Converter...

Page 4: ...2 49 SMALL EXPANSION BOX OPTIONAL 2 51 DISPLAY 2 52 Monochrome Display 2 52 Color Display Optional 2 54 KEYBOARD 2 56 DISPLAY AND KEYBOARD EXTENSION CABLES 2 58 MINIMUM SYSTEM CONFIGURATION 2 59 EXPA...

Page 5: ...27 Installing 8087 Numeric Data Processor 3 36 Replacing Mini Floppy Disk Unit With Hard Disk Unit 3 42 Removing Upper MFD Unit 3 42 Installing 10 or 20 MB Hard Disk Units 3 46 Installing Hard Disk Co...

Page 6: ...NG POWER TO THE SYSTEM 3 115 SiwiSaj DIAGNOSTICS INTRODUCTION 4 5 RESIDENT DIAGNOSTICS 4 7 Operating Procedures 4 8 Test Descriptions 4 10 Error Messages 4 15 Operating Procedures 4 22 Automatic Mode...

Page 7: ...ement Board 4 42 A 2nd HDU Drive and Controller Test 4 45 n SYSTEM TEST DIAGNOSTICS 4 47 W Loading System Test 4 47 1 Operating Procedures 4 48 n n n n n n n Test Descriptions 4 58 Motherboard Test 4...

Page 8: ...Help 4 101 HDU Configuration 4 102 Low Level Format 4 105 Display and Edit Bad Track Table 4 110 Format Bad Tracks 4 119 Verify Surface Test 4 121 Ship the Unit 4 124 Exit Low Level Format LLF Utilit...

Page 9: ...U Drive No 2 Tests 4 167 MAINTENANCE GENERAL 5 5 Troubleshooting 5 5 Replacing Faulty Modules 5 5 Reminders 5 6 TROUBLESHOOTING WITHOUT SYSTEM TEST 5 7 System Will Not Power Up Normally 5 7 System Loa...

Page 10: ...mat and Bad Track Mapping on the Hard Disk 5 41 Partition Hard Disk for MS DOS 5 45 Formatting the Hard Disk 5 47 Hard Disk Unit Not Ready on Cold Start 5 50 Resident Diagnostic Error Messages 5 51 I...

Page 11: ...150 Replacing Power Supply Unit 5 151 Replacing Fan 5 156 Replacing Motherboard 5 157 Replacing Bus Converter 5 161 Replacing Display Controller 5 162 Replacing Lower Mini Floppy Disk Unit 5 168 Repla...

Page 12: ...SW 0 Settings A 10 DIPSW 1 Settings A 13 Q 0 0 A HARD DISK CONTROLLERS A 16 HDUs Supported 29 DISPLAY CONTROLLER BOARD 30 Display Controller Jumpers A 30 Video Disable Option A 32 P4 Display Controlle...

Page 13: ...or A 39 Toshiba Mini Floppy Disk Unit A 39 OPE Mini Floppy Disk Unit A 41 Matsushita Mini Floppy Disk Unit A 43 HARD DISK UNIT A 45 Jumper and Switch Setting A 45 AT T PC 6300 ACCEPTANCE PROCEDURE A 5...

Page 14: ...0 Q n D n 0 n 0 n LI n 1 1 D n J I n...

Page 15: ...rl I i INTRODUCTION n m 1 i...

Page 16: ...I n i v n ft rs n rr...

Page 17: ...n n n A f n n n n ft n INTRODUCTION GENERAL i s ORGANIZATION 1 4 TOOLS AND ACCESSORIES 1 5 1 1...

Page 18: ...n 0 0 n n n n 0 n n1 0 0 0 0 n 0 n n...

Page 19: ...Computer 6300 PC 6300 and its options Since there is a minimum number of moving parts in the system there is virtually no preventive maintenance Therefore the maintenance of the system is limited to s...

Page 20: ...1 ORGANIZATION n n Chapter 2 SYSTEM OVERVIEW contains an overview of the PC 6300 and its main units It also contains some detailed information on the operation and functions of the system modules 1 j...

Page 21: ...when performing maintenance on the PC 6300 Volt Ohm Meter VOM Medium Sized Standard Screwdriver j ChipInsertionTool Chip Extraction Tool Wrist Strap Static Discharge Strap 2 Blank Formatted Scratch D...

Page 22: ...NTRODUCTION Parallel Loopback Connector for testing Parallel Port 1 4 inch Nutdriver 7 32 inch Nutdriver 3 16 inch Nutdriver 5 32 inch Nutdriver Phillips Screwdriver 1 6 n n 0 n 0 n 0 n I 0 n n n n n...

Page 23: ...I I n SYSTEM OVERVIEW ff i I 1 n I n I i I 1...

Page 24: ...i n I n r i n...

Page 25: ...Component Layout 2 25 Display Controllers 2 27 Bus Converter 2 31 Input Output I O Expansion Bus Characteristics 2 33 Mini Floppy Disk Unit s 2 35 Slim Hard Disk Units Optional 2 37 Hard Disk Unit Con...

Page 26: ...SYSTEM OVERVIEW KEYBOARD 2 56 MINIMUM SYSTEM CONFIGURATION 2 59 EXPANDED SYSTEM CONFIGURATION 2 60 2 2 n n n DISPLAY AND KEYBOARD EXTENSION H CABLES 2 58 a 0 n f n 0 n Q n n n D 0 n n...

Page 27: ...al Computer 6300 Figure 2 1 is a desktop unit and in its standard configuration contains three units System Module Display Monochrome or Color Keyboard An optional fourth unit the Small Expansion Box...

Page 28: ...SYSTEM OVERVIEW SMALL EXPANSION BOX HOUSE KEYBOARD PORT Figure 2 1 AT T Personal Computer6300 With Small Expansion Box Optional 2 4 n n I I 0 D 0 D n n n n 0 n n n n n...

Page 29: ...contain one Mini Floppy Disk MFD Unit and a 10 MB or 20 MB slim HDU If the Small Expansion Box or Slim HDU is 1 present the System Module will also contain a HDU Controller Board All system modules a...

Page 30: ...EW AIR INLETS NFD UNIT B NFD UNIT A RESET BUTTON POWER ON LEO AIR INLETS HDU C NFD UNIT A LATCH RESET BUTTON V POWER ON LED 0 n 0 n n Figure 2 2 Two Types of System Module Front Panels n 0 0 n 0 n 2 6...

Page 31: ...gure 2 3 consists of the following Keyboard Connector Serial Port Connector Parallel Port Connector Power Inlet Connector Power Outlet Connector 1 Display Connector n On OffSwitch Access Slots for Exp...

Page 32: ...SYSTEM OVERVIEW ON OFF REAR PANEL DISPLAY CONNECTQR ID PLATE SERIAL POUER SDCKETS FAN U CDVER KEYBDARD PARALLEL ACCESS SLOTS Figure 2 3 System Module Rear Panel 2 8 O n n n n n n n n 0 n n 0 n n n n...

Page 33: ...d at the bottom of the System Module chassis The Motherboard is placed in the System Module with its component side facing downward This means that if the lower cover of the System Module were removed...

Page 34: ...DDOD DdDdDdd DDDDDDDDD DD D nnUuDD 0 DDdDD dddodd Q 1 p DDddd ODD L DDDDDDDDD n n n DaODnDDDD D D 0 DDDDDDDDD ODD DDDD dD OD OIQI n DODDODDDDDDDDDD DDDDDOOD D ODODDCrMijlr 1 TW DDDD D ddD odDod DObD D...

Page 35: ...ors These sections are connected by three system buses P A Bus Carries address information generated by the CPU or i DMA controller D Bus Carries data information between the CPU DMA controller memory...

Page 36: ...0 n 0 n n n n n 0 n n n n n n n n...

Page 37: ...VERVIEW n MM 0 PQRI SElECr Loeic CPU NOP G OHAC nTryiTt i 8us i i t in l t l l l iM i l Hi i i irTTrT7ri USG iU 9S30 see uu s l v n isoirri entvt miEaF I O PERIPHERAL INTERFACES Figure 2 5 Functional...

Page 38: ...n n n 0 n n n n n n n n n n n n n n...

Page 39: ...rs the 8086 instruction stream and extracts only the commands intended for the 8087 The 8087 NDP instructions include a full set of arithmetic functions as well as powerful exponential logarithmic and...

Page 40: ...by the DMA circuitry I The Motherboard has four standard memory configurations 128 KB 256 KB 512 KB CPU 3X and 640 KB In the 128 KB configuration the RAM resides in bank 0 Initially bank 1 does M not...

Page 41: ...y addresses FOOOO to FFFFF Following power up or reset the 8086 CPU always begins execution at location FFFFO that contains a jump instruction Thisjump instruction directs the system to the initial Re...

Page 42: ...ications Channel SCC Interface I O Chip Select Logic Interrupt Controller Timer Real Time Clock and Calendar Keyboard Interface The Keyboard Interface provides the interface between the system and the...

Page 43: ...ically located on the Motherboard Its chief component is the NEC mPD765 Floppy Disk Controller or equivalent This controller contains the circuitry and control functions for interfacing the 8086 CPU t...

Page 44: ...ay be one of the following n p The PC 6300 has a standard serial channel to support serial communications The LSI serial communication chip used is the f NEC 8250 or equivalent It provides one asynchr...

Page 45: ...rrupting device Once the interrupting device has been serviced the CPU resumes its main program at the point where it was interrupted The system has nine interrupts in all eight maskable interrupts an...

Page 46: ...week months etc for the system A 3 volt low power standby rechargeable battery is connected to it to ensure that the real time is kept even when the system is turned off The chip used is the MM58174AN...

Page 47: ...D RO ET5 GMO 03 03 33 jr dD dD daV 3P 3D 3D dD dD A13 A17 A15 A13 A12 OD O CD CD Z CO o CO re 3TR 3D C42 34 CabV QD CID A10 AS AB A6 A3 3D dD ffi dD dD lAO CD3 CO CO CO CO CO CO C33 cm OD CjD cm CID d...

Page 48: ...SL n n n n n n n n n n n n n n n...

Page 49: ...2 CPU 2 8250 UART 3 Bank 0 RAM 4 Bank 1 RAM 5 High Byte EPROM 6 Low Byte EPROM 7 8237 DMA Controller 8 8259A Interrupt Controller 9 NEC mPD765 MFD Controller or equivalent 10 8041 or 8741 Keyboard Con...

Page 50: ...DD D DDtm DDQDDD DDddd D D D a D D D nDDDDDDDD DDDDDDDDD DDDDDDDDD D D D DDDDDDDDD wirun DDD dddddddddDDDDDD dD nDDDDDDODi 10 11 Figure 2 7 Motherboard Integrated Circuit IC Chip Locations n n n n n...

Page 51: ...een the Motherboard and the Display They attach in a perpendicular fashion to the Motherboard by the two lower connectors The upper connectors are used for connection of the Bus Converter Board P2 BOA...

Page 52: ...ARD CDNNECTDR CONNECTDR Figure 2 9 Display Controller P4 Board PB BOARD GD 38D Jl BUS CONVERTER CONNECTOR RETAINING BRACKET I ini tn IOI ID 11 10 ini 1 10 001 101 GNO 5 MOTHERBOARD CONNECTDR DISPLAY C...

Page 53: ...can be operated either in a 40 column by 25 row mode or in an 80 column by 25 row mode In both modes character cell size is n 8 dots pixels by 16 dots pixels In the graphics mode three resolutions ar...

Page 54: ...green are displayed to simulate a color display The P4 Revision 5 or Higher and P8 Display Controllers have VIDEO DISABLE capability Refer to Appendix A for disable instructions 2 30 n n The display c...

Page 55: ...ed in seven rows Two or three of the rows have both a 38 pin and a 62 pin connector in the row These rows are used to connect the 16 bit expansion boards to the system and are referred to as dual conn...

Page 56: ...IEW 2 32 SINGLE EXPANSION SLOTS OUAL EXPANSION SLOTS DISPLAY CONTROLLER CONNECTORS SINGLE EXPANSION SLOTS OUAL EXPANSION SLOTS DISPLAY CONTROLLER CONNECTORS Figure 2 11 Bus Converter Boards n n n n n...

Page 57: ...ut I O Expansion Bus Characteristics All I O expansion bus signals are at standard TTL levels and all expansion bus outputs provide enough drive to power all seven system expansion slots assuming two...

Page 58: ...60 61 62 CHCK 07 06 05 04 03 02 01 DO 8CR0Y AEN A19 A18 A17 A16 A15 A14 A13 A12 All AID A9 A8 A7 A6 A5 A4 A3 A2 A1 lAO IRDY GNO 1 2 GNO AO 1 3 4 015 8HE 1 5 6 014 XMEMW 7 8 1 013 XHEMR 9 10 012 XIOW...

Page 59: ...0 KB Refer to the AT T Personal Computer 6300 Reference Manual for detailed pin information The MFD Units have an Indicator LED that is illuminated when that particular disk is being accessed The MFD...

Page 60: ...SYSTEM OVERVIEW n 2 36 LED ACCESS DOOR DOOR LOCK DOOR TYPE MFD UNIT LATCH LED LATCH TYPE HFD UNIT Figure 2 13 Mini Floppy Disk Units 0 n n a 0 n n n n n 0 j n n...

Page 61: ...s the same as the MFD Unit It also uses the same dc voltages as the MFD Unit The installation of this HDU requires a minimum of 256 KB RAM 20 MB Hard Disk Unit One of the MFD Units may be replaced wit...

Page 62: ...SYSTEM OVERVIEW n n 0 n Figure 2 14 10 or 20 MB Slim Hard Disk Unit n 1 n 0 n 2 38 0 n n n...

Page 63: ...ata Technology Corporation and the WD Western Digital The physical differences between the Controllers are 1 The DTC Controller is a full size modular circuit card The WD Controller is a half size mod...

Page 64: ...2 15 DTC Hard Disk Unit Controller The Jl J2 and J3 connectors on the DTC Controller provide the following The Jl connector is the control connector This connector transfers the control signals to an...

Page 65: ...Controller provide the following The Jl connector is the control connector This connector transfers the control signals to and from the HDUs Two HDUs can be installed using a Daisy Chain Connection T...

Page 66: ...de up of two groups of nine 64 K bit RAM chips One group is the lower byte even address and the other is the higher byte odd address Eight chips are used for memory and the ninth chip is used for pari...

Page 67: ...ard is 256 KB 128 KB in bank 0 and 128 KB in bank 1 This can be expanded up to 384 KB by inserting chips into bank 2 The Motherboard must have 256 KB RAM before the Memory Expansion Board can be used...

Page 68: ...LA16 and the LA16 B power supplies have 4 amp slow blow fuses 2 44 Q n ThePowerSupply is the metal boxfound atthe rearofthe System yl Module between the disk drives and the fan The PC 6300 uses a swi...

Page 69: ...ny variation of the 5 V dc will also affect the 12 12 and 15 V dc Figure 2 20 shows the power supply output voltages and the potentiometer location A special filter inserted on the Power Supply has th...

Page 70: ...Vp p 12 V Note 5 0 9 A 4 2 A 100 mVp p 15 V 10 1 0 A 1 8 A 250 mVp p 12 V 5 0 0 25 A 100 mVp p Figure 2 18 Power Supply Output Characteristics Note An impulsive repetitive load with maximum 1 5 duty c...

Page 71: ...6 2 A 16 8 A 50 mVp p t 12 V Note 5 0 9 A 4 5 A 100 mVp p 1 15 V 10 1 0 A 2 4 A 250 mVp p 12 V 5 0 0 A 100 mVp p Figure 2 19 Power Supply Output Characteristics Note An impulsive repetitive load with...

Page 72: ...CONTROLLER BOARD I 15V SYSTEN BOARDS GND 5V 11 a a a a 12V GND GND 5V INTERNAL DRIVES 12V GND r GND r SV SMALL EXPANSION BOX pWif a fl a g POTENTIOMETER m Tnnnr Figure 2 20 Power Supply Outputs and Po...

Page 73: ...16 colors 2 Two new graphic modes that support up to 16 536 colors patterns 640 X 400 pixels color graphics 16 colors on screen 16 shades of green on monochrome display 640 X 200 pixels color graphics...

Page 74: ...ll not support the simultaneous use of two Monochrome Displays 2 50 n n V A n 6 Compatibility between the Display Enhancement Board in the transparent mode and the IBM PC graphics software j The Displ...

Page 75: ...a 10 MB formatted HDU The HDU Controller is housed in the System Module on the Bus Converter Board This external HDU is connected to the HDU Controller by two ribbon cables The Small Expansion Box al...

Page 76: ...ochrome Display is attached to the System Module with a cable that serves as a signal and power cable The Display may either sit on top of the System Module or on top of a nearby table top or desk The...

Page 77: ...SYSTEM OVERVIEW i n 1 n n BRIGHTNESS CONTRAST Figure 2 22 Monochrome Display n Pi n n 2 53...

Page 78: ...a signal cable and a power cable The Display may sit on top of the System Module or on a nearby table or desk The Color Displays can display up to 16 different colors with the red green and blue video...

Page 79: ...SYSTEM OVERVIEW rr I rt n I a BRIGHTNESS CONTRAST ON OFF SWITCH Figure 2 24 A 318 Color Display n n n rt 2 55...

Page 80: ...shielded cable has 5 wires 1 12 V dc 2 Grounds and 2 bidirectional signal lines The cable is approximately 6 feet long and is coiled like that of a telephone handset The central alphanumeric part of...

Page 81: ...SYSTEM OVERVIEW 1 V rr m i i n r i 0 n n n n Figure 2 26 Model 302 Keyboard 2 57 n n n t...

Page 82: ...from the System Module When extension cables are U installed the connectors may be placed inside the base of the I Display so that the coiled Keyboard cable looks like it is connected to the Display B...

Page 83: ...I c System Module 1 Motherboard j 16 KB EPROM 128 KB RAM 8 MHz 8086 2 CPU j DMA Controller Floppy Disk Interface Timer Hy Interrupt Controller Serial Communication Controller one channel asynchronous...

Page 84: ...herboard 8087 Math Co Processor 16 KB EPROM n 640 KB RAM t l 8 MHz8086 2CPU DMA Controller H Floppy Disk Interface V Timer 0 Interrupt Controller m 0 Serial Communication Controller one channel asynch...

Page 85: ...SYSTEM OVERVIE rr n A n n n n d Small Expansion Box Full Size 10 MB HDU e Display and Keyboard Extension Cables 2 61...

Page 86: ...n I V n n n D 0 j I n 0 n n T n...

Page 87: ...I INSTALLATIONS m m 1 1 7 m i i...

Page 88: ...I n M 0 i f r...

Page 89: ...y Upgrading Memory Expansion Board Memory to 384KB 3 27 Installing8087Numeric Data Processor 3 36 Replacing Mini Floppy Disk Unit With Hard Disk Unit 3 42 Removing Upper MFD Unit 3 42 I i Installing 1...

Page 90: ...102 V n Installing the Keyboard ROM 3 104 Opening the Keyboard 3 104 Removing Existing ROM Chip 3 105 Installing New ROM Chip 3 105 Installing the Mouse Software 3 107 Installing the Mouse Software W...

Page 91: ...xtensive machine damage The PC 6300 should when possible be isolated from sources I of electrical noise and from devices that can cause excessive voltage level variations Some common sources of electr...

Page 92: ...hour this may be enough to raise the temperature beyond the maximum allowed if enclosed in a small area This will also decrease the air flow around the module j i rl n V n n 4 The front and rear pane...

Page 93: ...wer usage 162 watts i t Ambient Temperature Operating 10 to 40 degrees Centigrade i gf 50 to 104 degrees Fahrenheit Storage 40 to 60 degrees Centigrade 40 to 140 degrees Fahrenheit Relative Humidity 1...

Page 94: ...s n n n APPROXIMATE PHYSICAL CHARACTERISTICS UNIT SIZE WEIGHT System Module 15 X 14Vz X 6 38 1 cm X 36 8 cm x 15 2 cm 30 8 lbs 13 8 kg Monochrome Display 13 X 12 3 x lO A 33 0 cm X 31 3 cm x 26 3 cm 1...

Page 95: ...ee main units of the system are the System Module the Display and the Keyboard These units are packed in protective packaging before being placed in a shipping carton The packaging protects the module...

Page 96: ...various positions to allow access to certain parts of the module When handling the System Module care should be taken notto damage its componentsin any way If the System Module contains a HDU extra c...

Page 97: ...set for the various system n configurations Atthis point it may be helpfultoremovethe System Module covers to view the DIP switches and jumpers while reviewing Appendix A Removing System Module Covers...

Page 98: ...o screws that secure the upper cover Figure 3 2 pn IWPmt ina m 1 LIUUUULULI Figure 3 2 Removal ofthe Upper System Module Cover 2 Slide the Upper Cover forward approximately 0 5 inch and lift it from t...

Page 99: ...down so that the lower cover is on top 2 Loosen the two screws that secure the lower cover Figure 3 3 n n a Figure 3 3 Removal of the Lower System Module Cover n 3 Slide the lower cover forward approx...

Page 100: ...K bit or 256 K bit RAM chips see the following table Medium sized standard screwdriver VARIOUS CONFIGURATIONS NEW UPGRADED CONFIGURATION 18 RAM Chips Total Memory Add 18 RAM Total New Memory in Bank 0...

Page 101: ...board memory proceed as follows 1 Turn the System Module and all external devices OFF 2 Unplug the ac power cable from the rear panel 3 Disconnect all cables Display Keyboard Printer etc from the rear...

Page 102: ...QQOOQflC uuuuuuu BANK 1 FRONT RIGHT HAND CORNER Figure 3 4 Locating Bank 1 on the Motherboard 8 Put on the wrist strap and connect to ground if available or touch the metal chassis before picking up t...

Page 103: ...t the notch in the chip C is facing the same direction as the other chips on the board To insert push the chip down firmly Figure 3 5 Inserting RAM Chip into the Socket 10 Repeat Step 8for the remaini...

Page 104: ...0 on the Motherboard Figure 3 6 nnnnnonn OOOOOoOO DIPSU 1 DIPSU 0 1 1 1 1 11 C C 1 1 n Figure 3 6 Locating DIPSW 0 on the Motherboard Note Refer to Appendix A for other DIPSWtO settings n n 0 n n n 0...

Page 105: ...ch 3 ON Switch 4 ON Switches 5 to 7 Do not require setting for memory Switch 8 OFF i Figure 3 7 DIPSW 0 Setting for 256 KB Total Memory n ri 1 1 n Note Some switches are rocker type others are slide t...

Page 106: ...Switches 5 to 7 Do not require setting for memory Switch 8 OFF Figure 3 8 DIPSW 0 Setting for 640 KB Total Memory on Motherboard Using 256 K Bit Chips in Bank 1 Note Some switches are rocker type oth...

Page 107: ...Switches 5 to 7 Do not require setting for memory Switch 8 OFF n I n Figure 3 9 DIPSW 0 Setting for 640 KB Total Memory on Motherboard Using 64 K Bit Chips in Bank 1 n fl n n n Note Some switches are...

Page 108: ...on 18 Connect the cables that were disconnected Keyboard Display Printer etc back to the rear panel of the System Module 19 Plug the ac power cable into the rear panel 20 Verify that the RAM passes Re...

Page 109: ...tled Upgrading Memory Expansion Board to 384 KB before installation The materials required for the installation of the Memory Expansion Board are Medium sized standard screwdriver i I Memory Expansion...

Page 110: ...lower covers located on the rear panel 6 Slide the lower cover forward approximately 0 5 inch and lift it from the System Module 7 Locate DIPSW 0 on the Motherboard Figure 3 10 n 0 n 0 n nnnnnnnn ooo...

Page 111: ...o not require setting for memory Switch 8 OFF n Figure 3 11 DIPSW 0 Setting for 512 KB Total RAM in System 256 KB on Motherboard 256 KB Memory Expansion Board n Note Some switches are rocker type othe...

Page 112: ...back to its upright position 11 Slide the upper cover forward approximately 0 5 inch and lift it from the System Module 12 Using a screwdriver remove the Expansion Slot Cover of the second dual connec...

Page 113: ...touch the metal chassis before picking up the Memory Expansion Board to release the static electricity from your hand 14 Gently insert the Memory Expansion Board into the first dual connector expansio...

Page 114: ...upper System Module cover and tighten the two cover screws 18 Connect the cables that were disconnected Keyboard Display Printer etc back to the rear panel of the System Module 3 26 0 0 n D 0 n n 19 P...

Page 115: ...sure to touch the metal chassis ofthe system just before you handle I any IC chips or system boards To upgrade the Memory Board proceed as follows 1 Turn the System Module and all external devices OFF...

Page 116: ...cover forward approximately 0 5 inch and lift it from the System Module 8 Locate DIPSW 0 on the Motherboard Figure 3 14 BACK DIPSU 1 d c c c c c c c a c 0 0 0 0 0 0 ii 9g DIPSU O C l cm 1 1 cm cm im 1...

Page 117: ...ot require setting for memory Switch 8 OFF n Figure 3 15 DIPSW 0 Setting for 640 KB Total Memory in System 256 KB on Motherboard 384 KB on Memory Expansion Board Note Some switches are rocker type oth...

Page 118: ...retaining bracket to the rear panel 13 Put on the wrist strap and connect to ground if available or touch the metal chassis before picking up the RAM chip to release the static electricity from your h...

Page 119: ...INSTA LATIONS n n n n n 14 Remove the Memory Expansion Board from the Bus Converter Figure 3 16 Figure 3 16 Removal of the Memory Expansion Board n n n n 3 31...

Page 120: ...TIONS n n 15 Locate Bank 2 on the Memory Expansion Board Figure 3 17 BANK 1 BANK 0 BANK 2 BBBBBBBBB Esa h essi 1 Ir il umMB Figure 3 17 Locating Bank 2on the Memory Expansion Board n P n n n n 3 32 n...

Page 121: ...e 3 18 Make sure that the notch in the chip C is facing the same direction as the other chips on the board Push the chip down firmly to insert n n Figure 3 18 Inserting the RAM Chip into the Socket 17...

Page 122: ...S 18 Gently insert the Memory Expansion Board into the first dual connector expansion slot on the Bus Converter Board Figure 3 19 n n n 0 n Figure 3 19 Inserting the Memory Expansion Board n n n 1 n 3...

Page 123: ...ear panel 21 Replace the upper System Module cover and tighten the two cover screws 22 Connect the cables that were disconnected Keyboard Display Printer etc back to the rear panel 23 Connect the ac p...

Page 124: ...rd Printer etc from the rear panel of the System Module 3 36 n n The 8087 Numeric Data Processor NDP is a fast arithmetic I i processor that serves as a co processor to the 8086 CPU The 8087 NDP is in...

Page 125: ...wer 1 cover is on top I 1 5 Loosen the two screws that secure the lower cover located r on the rear panel 6 Slide the lower cover forward approximately 0 5 inch and n lift it from the System Module 7...

Page 126: ...D ODD DDDD DDQaQODOnDDDDDD ddD riDDDDDDDDi DD Odd Uo DDDODCr DDaDDinniDDDDr C I I I I I Figure 3 20 Locating the 8087 NDP Socket 8 Put on the wrist strap and connect to ground if available or touch th...

Page 127: ...chips on the Motherboard Then gently insert the 8087 NDP into the socket 10 Remove wrist strap if wrist strap was used 11 Locate DIPSW 0 on the Motherboard Figure 3 21 n n n n BACK DIPSW 1 w d c c c c...

Page 128: ...to 8 Do not require setting 1 2 3 4 5 6 7 8 0 N X X X X 0 X X X i i Figure 3 22 Setting DIPSW 0for Presence of8087 NDP n G n I I n n n 3 40 Note Some switches are rocker type others are slide type So...

Page 129: ...ition 15 Connect the cables that were disconnected Keyboard Display Printer etc back to the rear panel of the System Module 16 Connect the system power cable to the System Module and then to the ac wa...

Page 130: ...hes and jumpers Removing Upper MFD Unit 1 Turn the System Module and all external devices OFF 2 Unplug the ac power cable from the rear panel 3 Disconnect all cables Keyboard Display Printer etc from...

Page 131: ...Figure 3 23 and slide the assembly forward to permit access to the signal and power cables I Itrrrr s o u m o a Figure 3 23 Unlocking Drive Assembly 7 Carefully remove the ribbon cables power cables...

Page 132: ...crewdriver carefully remove the screw from the side of the assembly that secures the ground strap Figure 3 24 and remove the assembly from the cabinet fl 0 n n n Figure 3 24 Removing Drive Assembly Gr...

Page 133: ...of the lower MFD Unit in place and lift the cover and the upper MFD Unitfrom the assembly 10 Remove the four screws that attach the upper MFD Unit to the cover and remove the MFD Unitfrom the cover F...

Page 134: ...nd screws that attached the upper MFD Unit 2 Attach the HDU and cover to the drive assembly using the same screws that were removed Do not fasten the screw used bythegroundstrap untilthegroundstrapisi...

Page 135: ...ke sure that the signal cable connector for MFD Unit A is the same one that was used previously Verify that the numbers on the signal cable connector correspond to the numbers on the MFD Unit Figure 3...

Page 136: ...echnology Corporation and the WD Western Digital The physical differences between the Controllers are 1 The DTC Controller is a full size modular circuit card The WD Controller is a half size modular...

Page 137: ...arlier versions Both the DTC and the WD Controller are supported by ROM BIOS 1 43 and later versions n 1 Using a screwdriver remove the Expansion Slot Cover closest to the HDU Figure 3 27 on the rear...

Page 138: ...ure 3 28 SINGLE EXPANSION SLOT DUAL EXPANSION SLOTS DISPLAY CONTROLLER EXPANSION SLOT COVER BUS CONVERTER Figure 3 28 Single Connector Expansion Slots 3 Using a screw and screwdriver secure the HDU Co...

Page 139: ...colored stripe on the ribbon cable is on the bottom DTC or on the left for Western Digital 5 Connect the other end of the small ribbon cable to the 20 pin connector on the rear of the HDU ensuring tha...

Page 140: ...es and jumpers that must be set with the removal of the MFD Unit B and the installation of the HDU One switch is located on the Motherboard and the remainder of the switches and jumpers are on the HDU...

Page 141: ...INSTALLATIONS n n n n n n 3 Locate DIPSW 1 on the Motherboard Figure 3 30 BACK DIPSU 1 nnnnnnnn 00000000 DIPSU O Figure 3 30 Locating DIPSW 1 on the Motherboard n n n n 3 53...

Page 142: ...uire setting for disks Switch 7 ON Switch 8 ON Figure 3 31 DIPSW 1 Setting for One Mini Floppy Disk Unit and Hard Disk Unit s n n n fm P n Note Refer to Appendix A for additional switch settings Some...

Page 143: ...cover and tighten the two cover screws 6 Place the System Module back to its upright position 7 Determine the type DTC or WD Controller and locate the jumpers on the HDU Controller Board Figure 3 32 N...

Page 144: ...NABLE ADDRESS SECTOR SIZE UO CONTROLLER J3 3 Z J2 U1 test of lop U2 TEST lol U3 RON BIOS US J1 HEAO SELECTION US PRON ENABLE U4 PORT AOORESS U7 INTERUPT Figure 3 32 Two Types of Hard Disk Controller B...

Page 145: ...s The Jl J2 and J3 connectors on the WD Controller provide the following The Jl connector is the control connector This connector transfers the control signals to and from the HDUs Two HDUs can be ins...

Page 146: ...ontroller EPROM at 0800 0000 and a jumper on W18 enables the HDU Controller EPROM The HDU Controller EPROM must not be present 11 Verify a jumper is present on W20 and not present on W19 Figure 3 32 T...

Page 147: ...N Note Some switches are rocker type others are slide type Some DIP switches have the ON designation at the top of the switch others have it on the bottom Refer to Appendix A for other hard disk switc...

Page 148: ...per vary 17 The jumper settings SWl for the 20 MB Seagate ST 225 HDU with WD Controller are shown in Figure 3 34 3 60 n 14 Proceed to Step 19 h 15 Verify that jumpers are present on Wl W2 W4 and W6 on...

Page 149: ...LLATIONS Jumpers 4 7 and 8 are PRESENT Jumpers 1 2 3 5 and 6 are NOT PRESENT Figure 3 34 Seagate ST 225 20 MB Hard Disk With WD Controller DIP Switch Jumper Settings Note Refer to Appendix A for addit...

Page 150: ...re the cover 20 Connect the cables that were disconnected Keyboard v Display Printer etc back to the rear panel of the System Module 21 Plug the ac power cable into the rear panel 22 Turn the Power Sw...

Page 151: ...ndard screwdriver Clamp for connecting Small Expansion Box to System Module To install the Small Expansion Box 1 Turn the System Module and all external devices OFF 2 Unplug the ac power cable from th...

Page 152: ...tic cut out panel on the left side of the upper System Module cover by applying pressure on it with a screwdriver Figure 3 35 Figure 3 35 Removing a Plastic Panel From the System Module 3 64 n 0 0 n 5...

Page 153: ...System Module Figure 3 36 Make sure that the signal cables are placed into the System Module so they are not pinched Figure 3 36 Fitting a Small Expansion Box to the System Module 8 Fasten the Small...

Page 154: ...resent on W1 and W2 Figure 3 38 This defines the HDU Controller port address as 320 11 Verify a jumper is present on W17 and is not present on W18 Figure 3 38 A jumper on W17 defines the starting addr...

Page 155: ...TCH W19 01 U17 roToi W1 ADDRESS ENABLE ADDRESS SECTOR SnE UD CONTROLLER J3 U1 TEST lop U2 TEST lEl J2 RON US PRON ENABLE US U4 J1 HEAO SELECTION ue PORT ADDRESS U7 INTERUPT Figure 3 38 Two Types of Ha...

Page 156: ...or transfers the control signals to and from the HDUs Two HDUs can be installed using a Daisy Chain Connection The J2 and J3 connectors are data connectors These connectors transfer data to and from t...

Page 157: ...lled using a Daisy Chain Connection The J2 and J3 connectors are data connectors These connectors transfer data to and from the HDUs The J2 connector must be used in a 1 HDU configuration The J3 conne...

Page 158: ...witches are rocker type others are slide type Some DIP switches have the ON designation at the top of the switch others have it on the bottom Refer to Appendix A for other hard disk switch configurati...

Page 159: ...IOS 1 43 or higherarerequiredforthe WDcontroller 17 Verify the jumper s location W2connects pins 1 and 2 W4 n connectspins2and3 and W6connectspins2and3 Location W3 does not have a jumper Note The phys...

Page 160: ...PRESENT 1 2 3 4 8 7 6 5 o o o o o o ccc o o o o 0 0 0 n Figure 3 40 Seagate ST 225 20 MB Hard Disk With WD Controller DIP Switch Settings Note Refer to Appendix A for additional HDU switch settings 1...

Page 161: ...n n I n INSTALLATIONS 20 Connect the power cable from the Small Expansion Box to the connector on the power supply Figure 3 41 n IT n n Figure 3 41 Connecting Small Expansion Box Power Cable n n 3 73...

Page 162: ...TALLATIONS n 21 Using a screwdriver remove the Expansion Slot Cover closest to the HDU Figure 3 42 on the rear panel 0 n Figure 3 42 Removing the Expansion Slot Cover 3 74 0 U s n n n 0 n Li n n 0 n i...

Page 163: ...sion slot Figure 3 43 SINGLE EXPANSION SLOT OUAL EXPANSION SLOTS DISPLAY CONTROLLER EXPANSION SLOT COVER BUS CONVERTER Figure 3 43 Single Connector Expansion Slots n n n n 23 Secure the HDU Controller...

Page 164: ...signal cables at the HDU end Figure 3 29 3 76 0 n n Connect the other end of the large ribbon cable to the 34 pin m connector marked Jl on the HDU Controller Board Li ensuring that the colored stripe...

Page 165: ...external devices OFF 2 Unplug the ac power cable from the rear panel 3 Disconnect all the display cables from the rear panel of the System Module ft j 4 Loosen the two screws that secure the upper co...

Page 166: ...th the 3 pin jumper supplied with the DEB 9 Using a screwdriver remove the Expansion Slot Cover of an unused dual expansion slot Figure 3 45 near the VDC Note Although the DEB can be placed in any dua...

Page 167: ...n Slots in the System Module n n 10 If a color monitor is to be connected to the DEB go to Step 13 If a Monochrome Monitor is to be connected to the DEB locate the 15 volt connector Figure 3 46 at the...

Page 168: ...standard board The two ways of determining your level number are a Look for a small label usually yellow located in the center top section on the VDC Figure 3 47 The label has the level number on it...

Page 169: ...1 1 1 1 DAUGHTER BOARD Figure 3 47 VDC PAL47 Chip Label and Daughter Board Locations 12 Locate the PAL47chip Figure 3 48 It is on the bottom row fifth column from the left at coordinates 5G Gently rem...

Page 170: ...ve the replacementPAL chip stored in the spare socket of the DEB 14 Align the pins of the replacementPAL chip with the socket check thatthe notch or dot on the chip is facing the same direction as the...

Page 171: ...remove the jumper cap from jumper location A Figure 3 49 on the DEB JUMPER A CLOSED OPEN JUMPER B I II 11 1IZZ 1 1 11 1 i i iiiiniii i ii i i i i i i i i i i i ii i i i i i i i i iii VERSION 1 JUMPER...

Page 172: ...PER D JUMPER A CLOSED OPEN JUMPER B II I IC 111 1 11111 I F 11111111 11111 1 1 l l l lllllll lllll VERSION 2 JUMPER C Figure 3 49 Jumper Locations for Version Two of the DEB Sheet 2of 2 3 84 n n n n n...

Page 173: ...B and secure the connection with the two screws on the mounting bracket b If a monochrome monitor is to be connected to the DEB connect the monitor to the connector on the DEB and secure the connectio...

Page 174: ...ect one monitor to the VDC and the other monitor to the DEB If one is c a monochrome monitor the 15 volt connector must be connected to the same board VDC or DEB as the monochrome monitor Note The enh...

Page 175: ...e already at their default setting and do not require resetting JUMPER LOCATION JUMPER SETTING JUMPER FUNCTION A Closed Open No monitor connected to VDC Monitor connected to VDC B Open Closed Indicate...

Page 176: ...INSTALLATIONS 17 Align and insert the 50 pin connector cable to the VDC Figure 3 52 DEB VDC Figure 3 52 Connecting the 50 Pin Cable 3 88 0 n 0 n n 0 n r in j i M 0 n 0 n n n...

Page 177: ...ver n n 20 Ifa memory board wasremovedtoprovide workspace replace it at this time 21 Replace the system Module cover and tighten the two screws that secure the cover 22 Reconnect any cables that were...

Page 178: ...automatically by the PC each time the system is started CONFIG SYS defines the specific system to DOS When a nonstandard device such as the DEB is used DOS needs to know where to find the driver for t...

Page 179: ...the system diskette MS DOS using the diskcopy command as follows a Insert the system diskette MS DOS that came with the system in drive A and boot up b Insert a blank diskette in drive B If the system...

Page 180: ...the new system diskette as follows as required The new version of GWBASIC will replace the older version 3 92 n n c Type the following n n Note If the system has only one drive follow the prompts and...

Page 181: ...ile s copied will appear Type the following copy b dedriver dev a When the copy has been made the message 1 file s copied will appear 3 To edit the CONFIG SYS file use EDLIN or any other text editor t...

Page 182: ...will appear If these messages do not appear refer to the section titled Troubleshooting DEB Installation before adjusting your monitor disk 1 To replace the GWBASIC on the system disk hard disk with...

Page 183: ...lowing copy argwbasic exe c d When the copy has been made the following message will appear S 1 nie s copied Type the following N copy a dedriver dev c L When the copy has been completed the following...

Page 184: ...me of the directory where the DEDRIVEII DEV file resides The system will automatically create a CONFIG SYS file if one does not already exist b Now reboot the system Press the RESET button at the fron...

Page 185: ...Check to see if the 50 pin connector cable is correctly connected at both ends It is possible to connect the cable so that some of the pins are beyond the end of the connector See Installing the DEB M...

Page 186: ...on software indicates a wrong monitor is connected monochrome instead of color or vice versa Make sure jumper A on the DEB is set correctly Run the Customer diagnostic and it will show whether the sys...

Page 187: ...ge appears when SETUP BAS is run Reboot the system and try again If the error persists the problem is one of the following a The wrong version of GWBASIC is being used reinstall the new version See DE...

Page 188: ...pside down to locate the ball housing cover Remove the cover by turning it counterclockwise Figure 3 53 2 Insert the ball into its housing 3 Replace the cover and secure it by turning it clockwise Not...

Page 189: ...n n n n n n n INSTALLATIONS n n n n Figure 3 53 Mouse Housing n n n n n n 3 101...

Page 190: ...power is not off already 2 Locate the Keyboard Mouse Connector mouse port on the back edge of the Keyboard Figure 3 54 3 Press the plug at the end of the mouse cable into the mouse port 4 Tighten the...

Page 191: ...n INSTALLATIONS n n n n n n n n n n n SMALL EXPANSION BOX MOUSE KEYBOARD Figure 3 54 Locating the Mouse Port 3 103 n n...

Page 192: ...ch nearest the Keyboard cable with a small screwdriver while spreading apart the top and bottom halves of the Keyboard Proceed clockwise until all the latches have been released Figure 3 55 Figure 3 5...

Page 193: ...ereplaced 2 Carefully remove the chip by prying it up from its socket Installing New ROM Chip 1 Put on the wrist strap and connect to ground or touch the metal chassis before picking up the ROM chip t...

Page 194: ...INSTALLATIONS Figure 3 56 Inserting ROM Chip into the Socket 3 Remove wrist strap if wrist strap was used 4 Replace Keyboard covers 3 106 n n n n 0 n n n n n n n n n...

Page 195: ...ow to install the mouse software with the computer you are using Installing the Mouse Software With the Dual Diskette Computer n YouneedtocopyyourDOSsystem disketteandthe mousedriver diskette onto one...

Page 196: ...into drive A 7 When you see the A type the command ccjpy a b Then press the RETURN key This gives you a bootable mouse system diskette that activates the mouse every time you use it Remove the Mouse D...

Page 197: ...below Installing Mouse Software With the Hard Disk Computer n n n n n n n n n n n n 1 Put the Mouse Diskette into drive A 2 When you see the A type the command copy a c 3 Or if you see C type the comm...

Page 198: ...tor on the rear panel Figure 3 57 3 110 n The installation of the PC 6300 consists of connecting the Keyboard and Display to the System Module Before installing the system make sure that the site chos...

Page 199: ...n n n n n n n n POUER CABLE CONNECTION OISPLAY CABLE PLUGS HERE KEYBOARD CABLE CONNECTION COLOR MONITOR POUER CABLE CONNECTION Figure 3 57 Connecting Display to the Rear Panel 4 Place the Keyboard ne...

Page 200: ...INSTALLATIONS 5 Secure the Keyboard cable to the Keyboard Connector on the rear panel Figure 3 58 n n n 0 n n 0 n n Figure 3 58 Connecting the Keyboard to the Rear Panel n 3 112 fl n n n...

Page 201: ...tch is in the OFF position 7 Insert the female plug of the ac power cable into the power inlet on the back panel of the System Module Figure 3 59 ON OFF SWITCH Figure 3 59 Power Inlet on the Rear Pane...

Page 202: ...he Resident Diagnostics has been obtained refer I to the section Applying Power to System If the Resident Diagnostics pass run the Customer Test Diagnostics in the Automatic Mode tofully testthe opera...

Page 203: ...he Operating System The Operating System can reside on either a Diskette or on a hard disk If the Operating System resides on a diskette the diskette must be inserted into MFD Unit A If the Operating...

Page 204: ...At this point the system checks your disk drives If a hard disk is present you receive a Ready message If not you receive a Not Present message 6 The system now checks floppy disk drive A If a diskett...

Page 205: ...evious paragraphs and the following is a sample of a typical display ATAT Peraonai Computer 6300 Copyright Cc 1984 by ATaT all rights reserved Compatibility Software Copyright c 1984 by Phoenix Softwa...

Page 206: ...Mi n n n n n n n n n 1 n n n I n1 n...

Page 207: ...v KA DIAGNOSTICS i I...

Page 208: ......

Page 209: ...Descriptions 4 32 Motherboard Test 4 32 Memory Test 4 33 Keyboard Test 4 34 Video System Test 4 35 Parallel Port Test 4 36 Serial Port s Test 4 37 48 TPI Floppy Disk Test 4 37 HDU Drive and Controlle...

Page 210: ...o Option Board Test Display Enhancement Board H DEB 4 80 1 2nd HDU Drive and Controller Test 4 83 SYSTEM TEST DIAGNOSTICS OVERLAY VERSION 4 87 Loading System Test Overlay Version i 4 87 STAND ALONE MO...

Page 211: ...ory Tests 4 129 400 Keyboard Tests 4 133 500 Video Tests 4 137 600 Parallel Port Tests 4 144 700 8250 Serial Port Tests 4 145 800 MFD Unit Tests 4 147 900 HDU Tests 4 149 lOXX Parallel Printer Tests 4...

Page 212: ...n n D n n n N n n n n n t n n...

Page 213: ...The purpose of the Resident Diagnostics is to assure a minimum working level of the main modules in the system n Thenextlevelofdiagnostictestingisthe CustomerTest Diagnostics The Customer Test Diagnos...

Page 214: ...rd instead of Motherboard 4 6 Although all versions ofthe System and Customer Test work with j all versions of the ROM BIOS and MS DOS the following 1 recommendations are made fl 1 When testing a mach...

Page 215: ...the 8288 bus controller and a minimal subset of the CPUs 8086 instruction set must be working The two ROMs as well as the data address and control buses to the ROMs must be functioning The Display mu...

Page 216: ...switch ON 3 Keyboard lights NUM LOCK and GAP LOCK will blink during the Boot up Procedure 4 The Floppy Resident Diagnostic Screen should look similar to this n n 1 Resident Diagnostics Rev X XX cpuci...

Page 217: ...ting System resides on a diskette and the diskette has not been inserted in the MFD Unit or the MFD Unit cannot read the diskette the following message is displayed Primary Boot Strap Primary Boot Str...

Page 218: ...transfer arithmetic logical and string manipulation instruction classes are tested Fourth a set of the CPU s addressing modes are tested on ROM Fifth the stack _ segment and pointer registers are ini...

Page 219: ...isplay are sent confirmation that the CPU test has been successful If the CPU test fails an attempt is made to send a CPU i8086 Fail error message to the display and the CPU is halted 7 The ROM test i...

Page 220: ...lay and the CPU is halted 0 a 11 The 8237 DMA controller is tested The DMA controller is cleared and its registers as well as the 4 bit segment latch are tested with fixed test patterns The 8253 timer...

Page 221: ...m the 8259 The 8259 is programmed with all interrupts masked off The 8086 CPU s interrupts are enabled 17 The parallel printer port and the display are sent confirmation that the 8259 Interrupt Contro...

Page 222: ...t vectors including the nonmaskable interrupts due to parity errors during the RAM module test are initialized for normal operation 22 The parallel printer port and the display are sent confirmation t...

Page 223: ...are informed that the appropriate drive is Ready This informs you that the software recognizes that the drive is present from the system configuration switches 25 Control is transferred to the boot st...

Page 224: ...om Keyboard Controller not functioning Interrupt Fail H2 INT REQ2from I O Board not functioning Interrupt Fail H3 INT REQ3from I O Board not functioning Interrupt Fail H4 INT REQ4from Serial Interface...

Page 225: ...interrupt is out of specifi cation on the low end RT Clock FailtHI 8253 interrupt is out of specifi cation on the high end Figure 4 1 Resident Diagnostic Messages Sheet 2 of5 n n i n n n n DIAGNOSTIC...

Page 226: ...th failure 1 Bank 0 on Motherboard 2 Bank 1 on Motherboard 3 Bank 0 on Exp Board 4 Bank 1 on Exp Board 5 Bank 2on Exp Board BankO 512 KB Bank 1 128 KB 1 Bank 0 on Motherboard 2 Bank 0 on Motherboard 3...

Page 227: ...Total RAM y 128 KB bank with failure 1 Bank 0 on Motherboard 2 Bank 1 on Motherboard 3 Bank 0 on Exp Board 4 Bank 1 on Exp Board 5 Bank 2on Exp Board Bank 0 128 KB Bank 1 512 KB 1 Bank 0 on Motherboar...

Page 228: ...n Board DEB Second HDU and Controller 4 20 n w u n H n These tests allow customers to gain a degree of confidence in the correct operation of the system and discriminate between hardware and software...

Page 229: ...SK DRIVECS X 1 or 2 9 X HDU DRIVE AND CONTROLLER CX 10 or 20 MB IS THE LIST OF HARDWARE CORRECT Cy YES NO After pressing y followed by the ENTER key correct list the following message is displayed ATT...

Page 230: ...S Record any differenceCa between the llat of the Hardware on the acreen and the hardware that ahould be llated PROGRAM TERMINATED A _ 1 Check DIP switches on Motherboard see Appendix A 2 Use system t...

Page 231: ...FORMAT SCRATCH DISKETTE 2 EXIT DIAGNOSTICS PROGRAM ENTER DESIRED ACTION n Pressing the0key followed by the ENTER key takes you to MENU B where the list of installed hardware is displayed You must veri...

Page 232: ...played after you have pressed the key 0followed by the ENTER key at the end of MENU A n n 1 THE INSTALLED HARDWARE IS 1 MAIN BOARD 3 XXX KB MEMORY IXXX Total System KAMI 4 83 KEY KEYBOARD 5 XXXX VIDEO...

Page 233: ...fter you press the ENTER key the following will appear FORMATTING FORMAT COMPLETE PRESS ENTER KEY TO CONTINUE If you press the 1 key followed by the ENTER key the following is displayed INSERT DISKETT...

Page 234: ...FNUC The purpose of MENU C is to give you the option of testing all of the installed hardware or specific modules MENU C looks like this 1 MAIN BOARD 3 XXX KB MEMORY XXX Total System RAM 4 83 KEY KEYB...

Page 235: ...nue if an error occurs MENUD After pressing the 1 key followed by the ENTER key at the end of MENU A the following will be displayed ATTENTIDN SCRATCH DISKETTES MUST BE RE FQRMATTED BEFORE USE BY YOUR...

Page 236: ...d to continue the following is displayed SELECT DISKETTE DRIVE 0 drive A 1 drive B ENTER DESIRED ACTION _ If you press the 0 key followed by the ENTER key the following is displayed INSERT DISKETTE DR...

Page 237: ...he 1 key followed by the ENTER key the following is displayed INSERT DISKETTE DRIVE B PRESS ENTER KEY TO CONTINUE After you press the ENTER key the following will appear FORMATTING FORMAT COMPLETE PRE...

Page 238: ...n LSI Chips ROM Speaker Test y In the CPU test all of the addressing modes and instruction classes performed in the Power Up Diagnostics are tested again in j a more complete manner A test ofthe CPU r...

Page 239: ...he checksum defined to be a byte addition of all the bytes in the high and low ROM modules is summed and compared to zero The speaker test puts out tones of 50 100 200 400 800 1600 3200 and 6400 hertz...

Page 240: ...layout is displayed This layout is used to manually test the individual keys The LEDs on the keyboard should blink while the keyboard hardware is being tested During this phase the test is capable of...

Page 241: ...y Unit and Display Controller Monitor Test Patterns Displays the test patterns on the screen so that proper alignment of the screen can be checked The test patterns include an alignment grid and a scr...

Page 242: ...0 by 400 graphics mode using two colors 640 by 200 Graphics 2 Color Exercises the 640 by 200 graphics mode using two colors Parallel Port Test This test checks the path to the Parallel interface 4 36...

Page 243: ...tted in an MS DOS environment using the format utility format a or format b Thefollowingtestsarethencarriedout Sequential Write Sequential Read and Data Check V I Sequential Write This test writes a t...

Page 244: ...1 and so on 4 38 n n n n Drive Ready Test Testing HDU Controller Testing HDU Drive Seek Test on HDU Verifying HDU Surface Write to HDU Test Cylinder Read and Check Data on HDU Test Cylinder u Drive Re...

Page 245: ...on HDU Test Cylinder This test reads information off the test cylinder The test then checks to see if the information read to the HDU was the same information that was written in the previous test Par...

Page 246: ...DEFGHIJKLMNOPQRSTUVWXYZ _ abcdefghiiklninopq 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklranopqr 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklmnopqrs 0123456789 ABCDEFGHIJKLMNOPQRST...

Page 247: ...ollowing menu is displayed MOUSE TESTS 0 RETURN TO MAIN MENU 1 GRAPHIC MODE 2 TEXT MODE 10 RUN ALL OF THE ABOVE TESTS ENTER SELECTIONCS _ You may run a specific test by pressing the appropriate key fo...

Page 248: ...nterface The same serial loopback used for the 8250 may be used for complete testing of this port Jj 0 The Video Option Board can be tested with the System Test by using option 23 from the MENU C This...

Page 249: ...ALL OF THE ABOVE TESTS Specific tests can be run by entering the option number followed by the ENTER key or all tests may be run by entering the value 10 followed by the ENTER key n Note Tests 3 and...

Page 250: ...screen in a set of messages 4 44 0 n n n 2 OPTION BOARD TRANSPARENT MODE This test displays a framed full screen with three lines If any additional O random character and or blocks are displayed rejec...

Page 251: ...rive is not ready in 15 to 17 seconds an error message is displayed HDU Controller Test This test checks the HDU Controller j board This test writes reads and verifies all possible data to the ports t...

Page 252: ...U test cylinder Read and Check Data on HDU Test Cylinder This test reads information off the test cylinder The test then checks to see if the information read to the HDU was the same information that...

Page 253: ...troubleshooting information associated with the error messages refer to Chapter 5 MAINTENANCE Note It is recommended that you make a copy of your System Test Diagnostic Diskette Save the original as...

Page 254: ...NU A will appear on the screen Operating Procedures MENUA 0 0 U n L n Q n When the System Diagnostics are loaded MENU A appears and your screen should look like this SYSTEM TEST PROGRAM VERSION X XX T...

Page 255: ...to MENU B where the list of installed hardware is displayed Then you must verify that the list of installed hardware is correct Pressing the 2 key followed by the ENTER key takes you to MENU E where t...

Page 256: ...9 X MB HDU DRIVE AND CONTROLLER X 10 or 20 MB IS THE LIST OF HARDWARE CORRECT X y YES NO If you press the y key followed by the ENTER key you are taken to MENU D In MENU D you must indicate if all har...

Page 257: ...087 MATH COPROCESSOR 21 1 SERIAL PORT tUSING 8530 23 VIDEO OPTION BOARD 21 XX HARD DISK AND CONTROLLER To add all of the listed hardware k ey only To add individual hardware functionCs enter the desir...

Page 258: ...yed total syatam RAM 1 MAIN BOARD 3 XXX KB MEMORY XXX 4 83 KEY KEYBOARD 5 XXXX VIDEO SYSTEM CXXXX COLOR or MONOCHROME 6 1 PARALLEL PDRT S 7 1 SERIAL PORTCS USING 8250 8 X 48TPI FLOPPY DISK DRIVE S X 1...

Page 259: ...FINITE LOOPSl Regardless of which option you selected at the end of MENU A the following message is displayed prior to performing the tests h I i n n n n n n n n n n PAUSE ON ERROR Cy YES n NO It is r...

Page 260: ...ROR LOG 2 STOP ERROR LOG 3 SET TIME TO 00 00 00 4 DISPLAY TIME 5 EXIT TO TEST OPTIONS MENU ENTER DESIRED ACTION If you press the 0 key followed by the ENTER key an error log is initialized that record...

Page 261: ...used However care must be taken if the floppy disk tests are to be run because the contents of the diskette may be erased If you press the 1 key followed by the ENTER key the list of logged failures...

Page 262: ...ING YOUR OPERATING SYSTEM FORMAT COMMAND PRESS ENTER KEY TO CONTINUE _ 4 56 0 n Q Q 0 n n The previous message is to remind the user that scratch diskettes formatted by the System or Customer Test usi...

Page 263: ...NU F appears SELECT DISKETTE DRIVE 0 drive A 1 drive B ENTER DESIRED ACTION If you press the 0 key followed by the ENTER key the following is displayed INSERT DISKETTE DRIVE fl After you press the ENT...

Page 264: ...the ENTER key the following will appear 0 0 0 n 0 n FORMATTING FORMAT COMPLETE PRESS ENTER KEY TO CONTINUE Test Descriptions The following paragraphs briefly describe the tests performed during the Sy...

Page 265: ...test the diagnostics check the functionality of the following integrated circuits 8250 Communication Chip 8253 Timer 8237 DMA Controller 8259 Interrupt Controller 58174 Real Time Clock 8041 Keyboard C...

Page 266: ...ERN TEST 4 MOVING INVERSION TEST 5 BUS NOISE TEST 6 REFRESH TEST 7 RUN ALL OF THE ABOVE TESTS ENTER SELECTION S You may choose to run specific tests by pressing the appropriate key s separated by spac...

Page 267: ...y the pattern is read and verified and then the complement of the pattern is written into the cell and verified The test then goes to the next cell and repeats the same process until the end of memory...

Page 268: ...eyboard internal hardware is first tested and then a graphic representation of the Keyboard layout is displayed This layout display is used to manually test the individual keys The LEDs On the keyboar...

Page 269: ...80 BY 2S ALPHANUMERICS 8 PAGES 7 PAGING 40 BY 25 ALPHANUMERICS 18 PAGES 8 840 BY 400 GRAPHICS 2 COLOR 9 640 BY 200 GRAPHICS 2 COLOR 10 320 BY 200 GRAPHICS 4 COLOR 12 Z8001 MODE MONITOR TEST Note 20 RU...

Page 270: ...present in drive A This may be a nonwrite protected copy ofthe system test or the scratch diskette used for the floppy tests If this test is used with a write protected diskette in drive A either of t...

Page 271: ...data in the Video Controller Memory by DMA transfer The contents of the disk file is then compared to the Video Controller Memory see Customer and System Test Error Messages 2 Monitor Test Patterns Te...

Page 272: ...Display Controllers logic for normal intensity reverse m underline blinking reverse blinking underline blinking high intensity underline high intensity and blinking high intensity modes n 6 Paging 80...

Page 273: ...s performed as if a printer was connected to the port If you press key n followed by the ENTER key you are asked if the loopback jumper is installed IS THE PARALLEL PORT LOOPBACK JUMPER INSTALLED y YE...

Page 274: ...Module The loopback jumper is wired as follows Figure 4 2 Pin 1 STROBE to Pin 13 SELECT Pin 2 PTDO to Pin 15 ERROR Pin 10 ACK to Pin 16 INIT Pin 11 BUSY to Pin 18 GND Pin 12 PE to Pin 14 AUTOFDX n n n...

Page 275: ...using 8250 You are asked if a loopback jumper is connected IS THE SERIAL PORT LOOPBACK JUMPER INSTALLED C y YES n NO The loopback jumper connects the following pins Figure 4 3 Pin 1 PRGND to Pin 7 GN...

Page 276: ...DIAGNOSTICS n 14f 1 o o o d o 14 15 IB 17 18 CD O O Q d CD CP O ocdo 2 3 4 5 8 8 25 ocdoo 19 20 21 S3 23 24 25 O Q O O 10 1 12 13 13 Figure 4 3 Serial Loopback Jumper n n n n n n 1 i 4 70 n n I i n n...

Page 277: ...DISK DRIVECSJ NUMBER OF RETRIES ON DISKETTE ERROR 0 to S ENTER DESIRED ACTION Since many errors that occur on floppy disk drives are intermittent you may specify the number of retries by pressing the...

Page 278: ...matted in an MS DOS environment using the format utility format a or format b The following is a description of the tests performed by each MENU option 1 SEQUENTIAL WRITE This test writes to all secto...

Page 279: ...cks 7 WRITE PROTECT This test operates the write protect mechanism on the disk drive In this test sector 1 head 0 on track 39 will be read into the buffer first An attempt is made to write over the sa...

Page 280: ...ssing the appropriate key 0 to 5 followed by the ENTER key The HDU option menu is then displayed The HDU menu looks similar to HDU TEST SELECTIONS 0 RETURN TO MAIN MENU 1 DRIVE READY TEST 2 CONTROLLER...

Page 281: ...e itself 4 SEEK TEST The first seek is to the last cylinder the second seek is to the first cylinder the third seek is to the last cylinder 1 the fourth seek is to the first cylinder 1 and so on 5 VER...

Page 282: ...LL EXERCISER This Test Will Erase All Files on the Disk The full exerciser test performs tests 1 through 7 repeatedly 4 76 9 AGING TEST This Test Will Erase All Files on the Disk The aging test is a v...

Page 283: ...T BAD TRACKS This Test Will Erase All Files on the Disk This test finds bad tracks and marks them as bad tracks in the BTT 16 RUN ALL OF THE ABOVE TESTS This Test Will Erase All Files on the Disk This...

Page 284: ...123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklranopq 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklmnopqr 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklmnopqrs 0123456789 ABCDEF...

Page 285: ...ate key followed by the ENTER key Or you may run all the tests by typing 10 followed by the ENTER key 0 RETURN TO MAIN MENU Returns to the Main Menu MENU A 1 GRAPHIC MODE The graphic mode test asks yo...

Page 286: ...rs in MENU C only when the Video Option Board is present Note Option 23 will NOT be displayed if the Video Option Board is not present or is improperly installed After giving the choice for the PAUSE...

Page 287: ...the test performed by each of the MENU options 1 MEMORY TEST No error should occur during this test If any error does occur reject the DEB Note The Diagnostic Utility will write data on the default dr...

Page 288: ...T This option verifies the proper performance of several screen capabilities Several lines containing self explanatory messages are displayed on the screen each testing a different feature 6 REDUCED L...

Page 289: ...umber of retries by pressing the appropriate key 0 to 5 followed by the ENTER key The HDU option menu is then displayed The HDU menu looks similar to HDU TEST SELECTIONS 0 RETURN TO MAIN MENU 1 DRIVE...

Page 290: ...the hard m disk controller board This test writes reads and verifies all i j possible data to the ports that allow both writes and reads p 3 DRIVE HARDWARE This testchecks the hardware ofthe j hard d...

Page 291: ...in this manner 9 AGING TEST This Test Will Erase All Files on the Disk The aging test is a very long test The sectors are written and verified individually Then all sectors previously written are rea...

Page 292: ...one location to another This subroutine can also be found on the MS DOS disk P 14 DISPLAY BAD TRACK TABLE This test checks to see if there are any bad tracks on the HDU and puts them in a table 15 FO...

Page 293: ...ctly only with the 2 11 version of MS DOS MS DOS 3 1 and further releases take up more memory space than 2 11 and will display an error message Loading System Test Overlay Version The System Test Diag...

Page 294: ...ersion of the System Test is not placed in sa memory as in the standard version Various tests and j subtests are accessed directly from the diskette program as needed 0 8 If the system is looking for...

Page 295: ...operation The DMA Test Diagnostics is loaded as follows 1 Insert the MS DOS System Diskette into drive A and close the drive door 2 Turn the System Module power switch ON 3 After the Resident Diagnost...

Page 296: ...troller test is executed the following message is displayed Motherboard DMA Controller Teat Version X X This program teats the DMA controller for multichannel operation If the DMA chip has a bug the p...

Page 297: ...ller chip 8237 failed The bug occurs when 2 or more channels of DMA are used at the same time Most high speed tape drives and some network interface cards will be affected This is the only diagnostic...

Page 298: ...SURFACE test 5 Mark every bad sector in a track 4 92 n n The Stand Alone Low Level Format LLF Utility Test is similar to the Hard Disk Test portion of the PC 6300 System Test but has _ a professional...

Page 299: ...ted if the PC hasn t recognized the Hard Disk Controller 4 The HELP option provides information on how to operate the utility 5 The program can operate with a DTC or WD controller and will display the...

Page 300: ...s able to Low Level Format a HDU that has previously been low level formatted 11 The default number of retries is set at 2in the Verify Surface Test If after two retries a sector cannot be read withou...

Page 301: ...The reformat of each bad track is verified and retried once if all the sectors in the track fail to return codes If the verification fails after the second reformat a failure message is printed This...

Page 302: ...irst head The number of the first sector found bad on this track The BIOS error code that indicates why the sector was bad List of Operations This section describes the function performed by the Low L...

Page 303: ...ty of the utility is to check for the presence of the Hard Disk Controller If the HDC is not installed the following message is displayed and the program is aborted n AT T PERSONAL COMPUTER HARD DISK...

Page 304: ...ILITY ENTER SELECTION Some of the above selections require verification of the following conditions before execution The HDU must be selected previously using the HDU CONFIGURATION SELECT DRIVE option...

Page 305: ...urns to the Main Menu The HDU menu selections and their functions are as follows 1 HELP Displays a help message for the user regarding the utility 2 HDU CONFIGURATION This selects the target drive and...

Page 306: ...ntents of the bad track table n 7 SHIP THE UNIT This is a security precaution for the HDU which must be used before moving the PC 6300 n 8 EXIT TO L L F UTILITY Pressing key 8 followed by the ENTER ke...

Page 307: ...The Low Level Format utility performs a factory format on the hard disks supported by the PC 6300 This factory format must be performed before FDISK is run to create a partition on the HDU Before run...

Page 308: ...llowed by the ENTER key on the Main Menu This provides information about the HDU configuration and selecting the drive with the following menu HDU CONFIGURATION MENU 1 CHECK CONFIGURATION 2 SELECT DRI...

Page 309: ...4 0 tUeatern Digital or O T C Data Tedhnology Corporation Number of HDD installed 1 or 2 HDU 1 HDU 2 Number of heads n Number of cylinders nnn DIP switches X X 1 2 3 Number of heads n Number of cylind...

Page 310: ...S MENU ENTER SELECTION _ With 2 Hard Disks Installed SELECT DRIVE 1 DRIVE 1 2 DRIVE 2 3 RETURN TO PREVIOUS MENU ENTER SELECTION _ 1 DRIVE 1 Pressing key 1 selects HDU drive 1 2 DRIVE 2 Pressing key 2...

Page 311: ...the following steps are performed Note If the HDU appears to have a low level format the following warning message will appear 1 j n LOW LEVEL FORMAT DRIVE SELECTED 1 OR 2 WARNING THIS DISK APPEARS TO...

Page 312: ...l always be by definition six 6 and the following message will be generated HARDWARE TESTS SUGGESTS BEST INTERLEAVE FACTOR IS M S DO YOU WISH TO SPECIFY A DIFFERENT INTERLEAVE FACTOR CY or Nl 0 n u 0...

Page 313: ...ogram returns to the Main Menu If the Interleave Factor is in range all preparatory actions to execute the HDU formatting are performed and the format process is activated The following message appear...

Page 314: ...NT TO EDIT THE BAD TRACK TABLE CY or N If any of the sectors contain an error the drive format is repeated and the verification check is redone If the verification check still fails the following mess...

Page 315: ...y followed by the ENTER key the DISPLAY AND EDIT THE BAD TRACK TABLE function is called and the following menu is displayed DISPLAY AND EDIT BAD TRACK TABLE HDU DRI VE SELECTED IS 1 or 2 BAD TRACK TA...

Page 316: ...manufacturer would be entered P P n n D 0 This can be done by 1 Pressing key 4 when the Main Menu is displayed on the 2 In the Low Level Format after the entire disk is formatted the user is prompted...

Page 317: ...lows 1 FINISHED EDITING PROCEED WITH FORMATTING Causes the editor to be exited and the bad tracks in the bad track table are physically formatted with the bad track bit set in the ID field for all the...

Page 318: ...d the following message will be generated HARDWARE TESTS SUGGESTS BEST INTERLEAVE FACTOR IS DO VOU WISH TO SPECIFY A DIFFERENT INTERLEAVE FACTOR CY or N a If the user responds N or n followed by the E...

Page 319: ...S ENTER KEY TO CONTINUE and the program returns to the Main Menu 3 If the Interleave Factor is in range the following message is displayed FORMAT BAD TRACK DRIVE SELECTED 1 OR 2 4 If no bad tracks hav...

Page 320: ...NDER xx HEAD YY End format bad trackcsj PRESS ENTER KEY TO CONTINUE format bad trackcs failed PRESS ENTER KEY TO CONTINUE In both cases the program returns to the Main Menu 4 114 n n n 6 If the format...

Page 321: ...the range the following message is displayed n WARNING ILLEGAL ENTRY PRESS ENTER KEY TO CONTINUE If the user inputs a bad track that causes the drive to exceed the bad drive limits the track will be...

Page 322: ...hecylinder head numbers mustbe entered in decimal Ifa H track is added by mistake it can be deleted from the table using option 3 DELETE BAD TRACK S FROM TABLE n Q n b To return to the editor menu ent...

Page 323: ...ad track is not found the cylinder and head of the track to be removed are limit checked If they are not within limits the following message is displayed WARNING THE ENTERED BAD TRACK IS ALREADY ON TH...

Page 324: ...TRACK S PRESENT ON TABLE 4 118 il 0 n n 2 The head number of the bad track head 0 is the first head 3 The number of the first sector in the track that was found to be bad during the testing For manua...

Page 325: ...llows the user to exit without reformatting the tracks contained in the Bad Track Table Format Bad Tracks This option physically reformats the bad tracks in the bad track table with the track bit set...

Page 326: ...formed by DISPLAY AND EDIT BAD TRACK function are performed b If the user s answer is N or n followed by the ENTER key the reformat operation is started and the same actions performed by FINISHED EDIT...

Page 327: ...er the number of passes to run The default number of retries is set at2in the Verify Surface Test Therefore after two retries the sector is considered bad Finding a bad sector then track during the VE...

Page 328: ...bad track found exceeds the entries of the BTT the following error message is displayed BAD TRACK TABLE OVERFLOW VERIFY SURFACE TEST FAILED PRESS ENTER KEY TO CONTINUE Then the program returns to Main...

Page 329: ...following message is displayed WAIT VERIFY SURFACE TEST IN PROGRESS ON DRIVE 1 OR 2 ESTIMATED TIME XX VERIFYING CYLINDER YY b If the test is successfully completed the following end message will be d...

Page 330: ...the PC 6300 System To use the command go to the Main Menu and press key 7 The following is displayed SHIP THE UNIT WAIT SHIP IN PROGRESS ON DRIVE 1 OR 2 END SHIP FUNCTION If the HDU has been selected...

Page 331: ...ERROR MESSAGES table summarizes the Hexadecimal display code and mnemonic message printed by the PG 6300 during format operations LOW LEVEL FORMAT and FORMAT BAD TRACKS Either of the two displays dep...

Page 332: ...x05 OPERATION FAILED 0x07 DMA BOUNDARY 0x09 BAD TRACK FLAG OxOb BAD ECC ON READ 0x10 ECC CORRECTED DATA 0x11 HDU CONTROLLER FAILURE 0x20 BAD SEEK 0x40 TIME OUT 0x80 UNKNOWN ERROR Oxbb or other SENSE F...

Page 333: ...appears on MENU D For example 1 Motherboard Test XX is any number from 1 to 99 giving information on the type of error encountered Additional information such as status byte written byte read etc may...

Page 334: ...0 n 3 n 104 Calendar chip failed 105 8259 Interrupt Controller failed functional check 106 6845 Display Controller failed functional check n n 110 8250 Serial Communications Controller failed function...

Page 335: ...performs on its dependent hardware failed 120 Nonmaskable interrupt failed 300 Memory Tests The 300 series tests are the Memory Tests The error messages for this series of tests are listed below 301...

Page 336: ...the same data The m segment of the 16 KB block of main memory that was j copied is displayed in the error message This usually indicates that the Display Controller RAM is bad n 311 When the 16 KB Di...

Page 337: ...splayed The segment indicates the bank in which the failure occurred The segment codes for bank locations are listed in Figure 4 4 SEGMENT CODE BANK LOCATION 0000 Motherboard Bank 0 2000 Motherboard B...

Page 338: ...ta written and the binary data read Knowing which data bit is faulty one can then locate the faulty RAM chip as shown below Example Data Written in HEX AAAA Data Read in HEX ABAA 00 00 000100000000 n...

Page 339: ...erboard 402 Bad 8039 8049 or 8749 in the Keyboard or no Keyboard connected 40 3 8039 8049 or 8749 in the Keyboard indicates a stuck key error The scan code listed in the error message provides the loc...

Page 340: ...F1 58 F2 60 iTaT 611 F4 62 F5 83 F6 64 F7 65 F8 66 C S F8 67 FtO 68 f J Figure 4 5 Model 301 Keyboard Scan Codes Z3 1 I V M 1 ft ft M ft t I ft r i vjft ft 1II3 J o o CO H n cn...

Page 341: ...LL f2 6OI Fa 61 FA 62 F5 63 i il I 2 IS CAPS lock 58 16 42 7 7 20 21 34 47 0 9 48 F6 84 f7 85 FB 66 67 F8 EI11 FIO CM 49 50 51 BACK SPACE 14 lTf i nTl f M 53MJ 54M 43I m Figure 4 6 Model 302 Keyboard...

Page 342: ...the Keyboard beep circuit was not functioning correctly 408 Interrupt on keyboard not working only on System Test r i s s 4 136 n n 405 Operator indicated that the test using the Keyboard template on...

Page 343: ...he Memory Word Test 16 bit transfer S01 MONOCHROME COLOR VIDEO SYSTEM MEMORY WORD WRITE READ ERROR 1 16384 8800 7FFE 5A5A FEFE PASS BAD SEGMENT OFFSET WRITTEN READ An explanation of the displayed info...

Page 344: ...RTC6845 P i IN Data read from CRTC 6845 503 Video Memory failed byte check mode S02 tiaNaCHRQME COLaR VIDEO SYSTEM 6845 CRTC URITE READ ERROR 0000 00F4 OUT IN n The following message is displayed when...

Page 345: ...following message is displayed when an error occurs during the Memory Disk Transfer Test data block transfer This error is detected only for the System Test package 504 MaNDCHROME CQLQR VIDEO SYSTEM...

Page 346: ...the diskette as follows a Transfer of 1 K bytes if memory space available on diskette is less than 4 K bytes but greater than or equal to 1 K bytes b Transfer of 4 K bytes if memory space available o...

Page 347: ...OR VIDEO SYSTEM CHARACTER SET ERROR 520 The Grey Scale Test failed The following message appears when the display of 16 color shades of gray bars fails 520 MONOCHROME COLOR VIDEO SYSTEM COLOR GRAY BAR...

Page 348: ...fies the bad page 540 MQNOCHRQME CQLQR VIDEO SYSTEM 80 BY 2S PAGING ERROR X BAD PAGE G n n 0 n 541 The 40 by 25 Mode Paging Test failed The following message appears when the page display in 40 x 25 a...

Page 349: ...raphics Mode Test failed The following message appears when the image display in 640 by 200 graphics mode fails n SS1 MONOCHROME COLOR VIDEO SYSTEM 640 BY EOO GRAPHICS ERROR n n n n n n n n 552 The 32...

Page 350: ...test failed only on System Test 6x4 The Parallel Port interrupt circuit failed only on System Test Note X 0 1 2 and 3for the four possible ports A Hexadecimal status byte may also be displayed to aid...

Page 351: ...eries of tests are listed below 7x1 Data path check to the 8250failed P 7x2 Transmit receivefailed usingthe8250Internal Loopback Mode 7x3 Transmit receive failed using the loopback jumper only on Syst...

Page 352: ...Empty Bit 5 1 Trans Holding Register Empty Bit 4 1 Break Detect Bit 3 1 Framing Error Bit 2 1 Parity Error Bit 1 1 Overrun Error Bit0 1 Data Ready MODEM STATUS BYTE Bit 7 1 Received Line Signal Detec...

Page 353: ...rite Test 802 Error during Sequential Read Test 803 Error during Funnel Read and Data Compare Test only on System Test 804 Error during Verify Diskette only on System Test 805 Error during Random Read...

Page 354: ...0020 Bad 765 765 Controller has failed 0010 Bad CRC Bad CRC on diskette read 0009 DMA Boundary Attempt to DMA across 64 KB boundary 0008 Bad DMA DMA overrun on operation 0004 Record not fnd Requested...

Page 355: ...S he error messages for this series of tests are listed below 903 Controller RAM Test failed 904 Drive Self Diagnostics failed 905 Surface Verify Test failed PI 906 TestCylinder Write ReadTestsfailed...

Page 356: ...k space is less than the nominal value the drive must be replaced 931 Bad Block Determination Test failed 932 Track 00 or 01 or 02 or 03 Bad only on System Test All of the first four cylinders ofthe d...

Page 357: ...as failed 0011 Data Corrected ECC Corrected Data Error 0010 Bad ECC Bad ECC on disk read 000B Bad Track Bad Track Flag Detected 0009 DMA Boundary Attempt to DMA across 64 KB boundary 0007 Init Fail Dr...

Page 358: ...s follows ERROR DESCRIPTION 1001 Operator indicated error 1002 Error while printing character 18XX 8087 2 Numeric Co Processor Tests The 18XX series tests are the 8087 2 Numeric Co Processor Tests ERR...

Page 359: ...use Tests The error message for this series of tests are as follows ERROR DESCRIPTION 2010 Graphics operation error operator entered THIS ERROR IS DETECTED ONLY FOR SYSTEM TEST PACKAGE 2020 Text opera...

Page 360: ...r message for this series of tests are as follows ERROR DESCRIPTION 2101 Data path check to the 8580 failed 2102 Transmit receive failed using the 8530 internal loopback mode 2103 Transmit receive fai...

Page 361: ...when an error occurs during the Memory Word Test 16 bit transfer plane 0 2301 VIDEO OPTION BOARD PLANE 0 MEMORY WORD ERROR 1 16384 AOOOO 7FFE 5ASA FFFF PASS BAD SEGMENT OFFSET WRITTEN READ An explanat...

Page 362: ...ANE 1 MEMORY WORD ERROR 1 16384 A800 7FFE 5ASA FFFF PASS BAD SEGMENT OFFSET WRITTEN READ An explanation of the displayed information follows 4 156 D n n 0 n n PASS Number of test cycle BAD Number of m...

Page 363: ...303 VIDEO OPTION BOARD PLANE 2 MEMORY WORD ERROR 1 16384 BOOO 7FFE 5A5A FFFF PASS BAD SEGMENT OFFSET WRITTEN READ An explanation ofthe displayed informationfollows PASS Number of test cycle BAD Number...

Page 364: ...MEMORV BYTE ERROR 1 32768 AGOG 7FrE GG5A GOFF PASS BAD SEGMENT OFFSET WRITTEN READ 0 0 Q n n 1 T n An explanation of the displayed information follows PASS Number of test cycle BAD Number of memory w...

Page 365: ...e 1 2305 VIDEO OPTION BOARD PLANE 0 MEMORY BYTE ERROR 1 32768 A800 7FFF 005A OOFF PASS BAD SEGMENT OFFSET WRITTEN READ An explanation of the displayed information follows PASS Number of test cycle BAD...

Page 366: ...D PLANE 2 MEMORY BYTE ERROR 1 32768 B000 7FFF 0 05A OOFF PASS BAD SEGMENT OFFSET WRITTEN READ n An explanation of the displayed information follows PASS Number of test cycle BAD Number of memory words...

Page 367: ...hese errors are only detected for the System Test Package 2307 VIDEO OPTION BOARD PLANE 0 MEMORY DISK TRANSFER TEST THROUGH DMA OPERATIONS ERROR 1 1000 AOOO 0 5555 FFFF PASS BAD SEGMENT OFFSET WRITTEN...

Page 368: ...cted for the System Test Package 2308 VIDEO OPTION BOARD PLANE 1 MEMORY DISK TRANSFER TEST THROUGH DMA OPERATIONS ERROR 1 1000 A800 0 5555 FFFF PASS BAD SEGMENT OFFSET WRITTEN READ An explanation of t...

Page 369: ...ese errors are only detected for the System Test Package 2309 VIDEO OPTION BOARD Plane 2 MEMORY DISK TRANSFER TEST THROUGH DMA OPERATIONS ERROR 1 1000 B000 0 55SS FFFF PASS BAD SEGMENT OFFSET WRITTEN...

Page 370: ...FDU using the DMA feature in burst depends on the space available on the diskette as follows a Transfer of 1 K bytes if memory space available on diskette is less than 4 K bytes but greater than or e...

Page 371: ...the display ofimage in transparent mode fails 2310 VIDEO OPTION BOARD TRANSPARENT MODE ERROR 2320 Text graphics error 640 by 400 The following error message appears when the display of image in overla...

Page 372: ...s IND 80 by 25 alphanumeric fails n 2330 VIDEO OPTION BOARD TEXT 200 LINE GRAPHICS ERROR 2340 Full graphics display error 640 by 400 4 planes The following error message appears when the display of im...

Page 373: ...N BOARD REDUCED LUT LITTLEBITJ ERROR 24XX HDU Drive No 2 Tests The 24XX series tests are the HDU Drive No 2 Tests The error message for this series of tests are as follows ERROR DESCRIPTION 2401 Drive...

Page 374: ...urface failed this routine determines the bad block list THIS ERROR IS DETECTED ONLY FOR SYSTEM TEST PACKAGE 2430 Too many bad blocks If the HDUs available disk space is less than the normal value the...

Page 375: ...ed 0011 Data Corrected ECC Corrected Data Error 0010 Bad ECC Bad ECC on disk read 000B Bad Track Bad Track Flag Detected 0009 DMA Boundary Attempt to DMA across 64 KB boundary 0007 Init Fail Drive Par...

Page 376: ...0 n n n i n n...

Page 377: ...n J MAINTENANCE S m i I I ni i...

Page 378: ...1 1 1...

Page 379: ...o Mini Floppy Disk Units 5 28 One MFD Unit and One HDU 5 33 System Will Not Access Hard Disk 5 36 Hard Disk Problems 5 38 n ProblemsThatMayOccurinaOne TwoHardDisk Configuration 5 39 Placing Low Level...

Page 380: ...h Co Processor 5 109 Mouse 5 112 Mouse Test 5 114 8530 Serial Port Test 5 118 5 2 n n 0 n Lj n n Video Option Board Display Enhancement A Board 5 121 j i Video Option Board Test 5 125 Second Hard Disk...

Page 381: ...erboard 5 157 i Replacing Bus Converter 5 161 Replacing Display Controller 5 162 Replacing Lower Mini Floppy Disk Unit 5 168 Replacing Upper Mini Floppy Disk Unit 5 175 Replacing Slim HDU 5 180 Replac...

Page 382: ...n Pt n n j n n 0 0 n Q n n n...

Page 383: ...m is not capable of performing the System Test Diagnostics the section entitled Troubleshooting Without System Test should be used If the system is capable of performing the System Test Diagnostics th...

Page 384: ...allow access to certain areas When handling the System Module care should be taken notto damage its components in any way If the System j j Module contains a Hard Disk Unit HDU extra care should be ta...

Page 385: ...and errors are indicated refer to the Resident Diagnostic Error Messages for a list of the error messages and the corrective action to be taken If a unit such as the power supply display MFD unit or...

Page 386: ...ED Fan Okay Beep Okay 1 Verify that 2 and 0 volts are present on the LEDdeads If the leads have 5 and 0 volts present the LED is bad and the Motherboard must be replaced 2 Refer to Display Check No Di...

Page 387: ...re asked responses for both YES and NO answers are provided 1 Turn the power switch OFF 2 Loosen the two screws that secure the upper cover 3 Slide the upper cover forward approximately 0 5 inch and l...

Page 388: ...0 volts or greater scale observe polarity Figure 5 2 MOTHERBOARD lav 12V DISPLAY r CDNTRDLLER BDARO 5 10 SYSTEM BDARDS 155 g g g g 12V GND GND 5V INTERNAL DRIVES 127 GND GND r 5V SMALL EXPANSIDN BDX i...

Page 389: ...ply is being loaded down NO If the voltage was not within tolerance refer to Power Supply Adjustment If there was NO n voltagepresentontheterminals replacethe power supply W 8 Turn the power switch OF...

Page 390: ...ply and remove the cables 16 Does the VOM indicate 5 volts 4 75 5 25 volts YES Refer to Short Isolation Procedure NO Continue 17 Turn the power switch OFF 18 Reconnect all the power cables to the powe...

Page 391: ...e power up 21 Does the VOM indicate 5 volts 4 75 5 25 volts YES Replace keyboard NO Continue 22 Turn the power switch OFF r 23 Unplug display from the rear panel 24 Turn the power switch ON Wait 30 se...

Page 392: ...THERBOARO 12V 12V DISPLAY f g n CONTROLLER BOARD 1 1 SYSTEM BOARDS Ind D g 12V GNO GNO 5V INTERNAL DRIVES 12V GNO GNO SV SMALL EXPANSION BOX g 1 g 0 POTENTIOMETER 10 innnr Figure 5 3 Power Supply Conn...

Page 393: ...e power switch OFF 31 Plug 15 V dc Display Controller power cable into the power supply V j 32 Unplug 12 12 V dc Motherboard power cablefrom the power supply fl 33 Turnthepowerswitch ON Wait30secondsb...

Page 394: ...42 Plug Small Expansion Box External HDU power cable back into the power supply 0 0 38 Unplug Small Expansion Box External HDU power cable fromthe powersupply 40 Does the VOM indicate 5 volts 4 75 5 2...

Page 395: ...5 volts 4 75 5 25 volts YES Check the continuity of the MFD Unit A power cable If continuity is okay replace the MFD Unit A NO Continue 47 Turn the power switch OFF 48 Plug the power cable back into t...

Page 396: ...er switch OFF 54 Plug the power cable back into the rear of the MFD Unit B 55 Is Slim HDU present YES Continue NO Replace the power supply p I 56 Unplug the power cable from the rear of the Slim HDU 5...

Page 397: ...OFF 2 Loosen the screws securing the 5 and GND cables to the power supply and remove the cables 3 Attach the VOM to the 5 and GND cables Use ohms R x 1 scale 4 Does the meter read 0 ohms YES Continue...

Page 398: ...Remove Display Controller Board 9 Place the VOM across 5 and GND terminal connect points on Display Controller Board Figure 5 4 P2 BOARD GO 317 1 CD on I IL ni c i cnninnn nn s l GS OHO 3 TERHINAL CO...

Page 399: ...ONNECT POINTS P8 BOARD GO 380 k m 0 BI ni ini in zrzjflcnoi lODC DI IDf mz lOczioc Dtzzoncm ini ini II r a i ii iac 301 II I II I 1 11 mr II nil 11 11 lili 1 mi iiii III 1 1 iiiiii nil ini II 1 GNO 5...

Page 400: ...VOM indicate 7 ohms or more YES Continue NO Replace the Display Controller Board 11 Place the VOM across 5 and GND terminal connect points on Bus Converter Board Figure 5 5 5 22 1 1 Vi n 0 n 0 n n n...

Page 401: ...CE n n n n n n n n n n n n SINGLE EXPANSION SLOTS DUAL EXPANSION SLOTS TERMINAL CONNECT POINTS SINGLE EXPANSION SLOTS DUAL EXPANSION SLOTS 5 GND I UUinJ TERMINAL CONNECT POINTS Figure 5 5 Bus Converte...

Page 402: ...ontinue NO Replace the Bus Converter Board and continue 13 Place the VOM across 5 and GND terminal connect points on the Motherboard Figure 5 6 TERMINAL CONNECT POINTS Figure 5 6 Motherboard 5 and GND...

Page 403: ...n1 n n n rt I n n MAINTENANCE 14 Does the VOM indicate 7 ohms or more YES No short found on the boards Return to the Power Supply Check NO Replace the Motherboard 1 I n n I n n n n n n n 5 25...

Page 404: ...nector on the rear panel 3 Verify that 15 V dc is present on the power supply connector for the Display Controller Figure 5 7 l 12V 12V MOTHERBOARD DISPLAY CONTROLLER BOARD 5 26 SYSTEM BOARDS liio D D...

Page 405: ...n n n n n n n n n n n n n n n I n n n n MAINTENANCE 4 If 15 V dc is not present refer to Power Supply Check 5 If 15 V dc is present replace a Display b Display Controller Board c Motherboard 5 27...

Page 406: ...Replace with new one NO Continue 5 28 n 0 n Often the Mini Floppy Disk Units are suspected to be faulty because there are problems in loading the Operating System or an application program from a dis...

Page 407: ...ews that secure the upper cover 7 Slide the upper cover forward approximately 0 5 inch and lift it from the System Module 8 Unlock the drive assembly using a screwdriver and slide it forward enough to...

Page 408: ...d before connecting to the MFD Unit The MFD Unit into which this connector is plugged is defined as MFD Unit A 10 Plug the twisted MFD Unit A connector into the MFD Unit B The MFD Unit B becomes MFD U...

Page 409: ...MFD Unit B YES MFDUnitAisfaulty Replacethe MFD UnitA NO Continue 14 Turn the power switch OFF 15 Remove the power cable from the MFD Units and the power supply and check it for continuity 16 Is conti...

Page 410: ...Cable with a new one and attempt to boot the Operating System 19 Replace the cables back to their original position 20 Slide drive assembly back until it is locked into place 21 Refer to Power Supply...

Page 411: ...witch OFF 2 Insert a new Operating System Diskette into the MFD Unit A lower MFU Unit 3 Turn the power switch ON 4 Did the Operating System bootfrom the new Diskette YES Original Operating System Disk...

Page 412: ...and slide the assembly forward enough to gain access to the cables Figure 5 10 Figure 5 10 Unlocking Drive Assembly 9 Remove the power cable from the MFD Unit and power supply and check it for continu...

Page 413: ...rd 12 Does the signal cable appear to be in good condition YES Continue NO Replace the signal cable with a new one and attempt to boot the Operating System 13 Replace the cables back to their original...

Page 414: ...or recognizes it as being a non DOS partitioned disk This is probably the result of rough handling during shipment or transporting of the unit and is an indication that the HDU heads may be misaligne...

Page 415: ...problem a Place low level format on HDU System Test Diagnostics b Build MS DOS partitions on the HDU fdisk command 1 c ReformattheHDU formatcommand with soption If these steps do not produce a usable...

Page 416: ...encing Hard Disk Problems these maybe solved j using the following procedures If the problem still exists the j Hard Disk will have to be replaced n Note Hard Disks with a bad track among the first fo...

Page 417: ...check the following c Reformat the Hard Disk d LOW LEVEL FORMAT Refer to section Placing Low Level Format and Bad Track Mapping on Hard Disk e If these procedures do not work change out the Ha n n r...

Page 418: ...itch on the first HDU is set to drive 2 5 When formatting a drive larger than 32 MB a 9 MB j formatted DOS partition is produced due to the way MS DOS handles drives larger than 32 MB In releases of M...

Page 419: ...le from the rear panel 4 Loosen the two screws that secure the upper cover 5 Slide the upper cover forward approximately 1 2 inch and lift it from the System Module 6 Look at the top of your HDU for a...

Page 420: ...h IS LIST OF HARDWARE CORRECT is displayed 17 Type y and press Return NUMBER OF RETRIES ON HDU ERROR 0 TO 5 along with ENTER DESIRED ACTION is displayed 5 42 n n n n n n n n 15 Verify by typing y and...

Page 421: ...e must be done 21 Type y and press Return Select the option ADD BAD TRACK S TO TABLE by typing 1 followed by pressing Return ENTER CYLINDER is displayed 22 Enter the cylinder of one of the bad tracks...

Page 422: ...Correct any 1 mistakes by deleting and adding the changed data 27 Select the FINISHING EDITING PROCEED WITH n FORMATTING option by typing 0 followed by pressing Return Wait for the HDU test menu to b...

Page 423: ...n The message DO YOU WISH TO DISPLAY BAD TRACK TABLE is displayed Type n and press Return 32 From the TESTING OPTION MENU type 4 EXIT DIAGNOSTIC PROGRAM 33 Remove System Test diskette from drive A Ins...

Page 424: ...disk space is 305 cylinders will read 612 cylinders when a 20 MB Hard Disk is used 5 Press the ENTER key to indicate YES default that the entire fixed disk is to be used by MS DOS 6 The screen should...

Page 425: ...pace Is 612 cylinders The current active partition Is 1 Press Esc to return to FDISK Options C_1 8 The HDU is now partitioned for use by MS DOS Press the ESC key twice to return to MS DOS n n n n Form...

Page 426: ...total disk space 49152 bytes used by system 10543104 bytes available on disk A Note The numbers shown above and what you actually see on the screen may differ slightly When formatting is completed th...

Page 427: ...hould be able to boot MS DOS from the HDU If the system will not bootfrom the HDU enter the command dir c in an attempt to read the contents of the HDU If this is successful reformat the HDU format c...

Page 428: ...s turned ON this HDU may be the victim of a design problem This design problem has been p resolved and the replacement units have the fix incorporated This j problem is present only on cold starts whe...

Page 429: ...Failure Replace Motherboard DMA Control DMA Controller Failure Replace Motherboard Interrupt Fail Software Interrupt Failure Replace Motherboard Interrupt Fail HO Timer Channel 0 Failure Replace Mothe...

Page 430: ...T Clock Fail NR 8253 Interrupt Failure Replace Motherboard RT Clock Fail LO 8253 low end Failure Replace Motherboard RT Clock Fail HI 8253 high end Failure Replace Motherboard XXX RAM Fail RAM Failure...

Page 431: ...les are in good condition If cables are okay replace MFD Unit If an error message is still received the MFD Controller is faulty replace the Motherboard Note 2 This error message will be displayed if...

Page 432: ...RD Series 2400 SECOND HARD DISK UNIT The following items are supplied for each of the above tests series List of possible defective hardware Procedures for performing specific test s error For a detai...

Page 433: ...the MS DOS System Diskette into drive A 3 Turn the power switch ON and verify that the Operating System is booted 4 Remove the MS DOS System Diskette from drive A 5 Insert the System Test Diskette in...

Page 434: ...8 The list of installed hardware is displayed along with IS THE LIST OF HARDWARE CORRECT Press the y key f followed by the ENTER key n 9 Verified list of hardware is displayed along with i J informat...

Page 435: ...Data Path to LSI Chip Bad Motherboard 104 Calendar Chip Failed Motherboard See Note 1 105 8259 Interrupt Controller Failed Motherboard 106 6845 Display Controller Failed Display Controller 107 8237 DM...

Page 436: ...d hardware See Note 3 117 KeyboardI O Register Failed Motherboard 120 Nonmaskable Interrupt Failed Motherboard Note 1 Verify that a cap is present on jumper C prior to replacing the Motherboard Note2...

Page 437: ...ard MemoryExpansionBoard RAM Chip ft Display Controller ft 1 Turnthepowerswitch OFF Pf 2 Insert the MS DOS System Diskette into drive A 3 Turn the power switch ON and verify that the Operating System...

Page 438: ...the ENTER key IS THERE A MOUSE CONNECTED is displayed Press j j the n key if your system does not have a mouse If your system does have a mouse press the y key 3 18 or later versions of Diagnostics I...

Page 439: ...and an error message similar to the following is displayed if an error occurs f 00 01 04 PASS 1 302 XXX KB MEMORY FIXED PATTERN Z2000 XOOOO XAAAA XABAA SEGMENT OFFSET WRITTEN READ If the Addressing Te...

Page 440: ...4 PASS 1 304 xx KB MEMORY MOVING INVERSION Z2000 ZOOOO ZAAAA ZA6AA SEGMENT OFFSET WRITTEN READ 15 Record the error message and turn the power switch OFF 16 Using the recorded error message and tables...

Page 441: ...See Note 1 307 Parity Circuit Test Failed See Note 1 310 Data copied to the Video RAM from System RAM does not match Display Controller 311 Data copied back to System RAM from Video RAM does notmatch...

Page 442: ...y 0 D Cr 0 Note 2 Refer to Figure 5 14 to determine the bank in which the parity error is located If the bank is not socketed the board must be replaced If the bank is socketed replace the parity chip...

Page 443: ...ations are shown below Determining Faulty RAM Chips First the data written and read in HEX must be converted to binary The table shown in Figure 5 15 provides a HEX to binary conversion chart HEX BINA...

Page 444: ...Data Written in HEX AAAA Data Read in HEX ABAA Bit Position 15 14 13 12 11 10 9876 5 4 321 0 00 00 000100000000 5 66 n n j 0 D n Binary Data Written 10 10 101010101010 Binary Data Read 10 10 10 1110 1...

Page 445: ...n n n n n BANK 1 RSQSS89 BC8B88BQ E2SSS223 PQQQQQQg feaeeooQc finTn n nfrn BBTOBBBa DQOOOOOa feftQQQQQci QQQQQQOg lOOOOOOC BANK 1 FRONT RIGHT HAND CORNER 7 Figure 5 16 Motherboard RAM Chip Positions...

Page 446: ...B 0 1_ 2_1_1 4 f_V aniini amng pnmm nmnn tfuum pmnnH ifMiuij pmmq i prni imidl ammB Bmnmu rlBBBIIlW BapOQBBB iBBBBBBBBBll WwHWBWl KlBIBBBBW I I II HbBIBBbI liiiiiiiiiiiiiiiiiiiiiiiiiiiiir P PARITY NOT...

Page 447: ...tem Diskette into drive A c 3 Turn the power switch ON and verify that the Operating System is booted I i 4 Remove the MS DOS System Diskette from drive A 5 Insert the System Test Diskette into drive...

Page 448: ...wed by the ENTER key TEST 400 83 KEYBOARD TEST 00 02 04 PASS 1 402 83 KEY KEYBOARD KEYBOARD SELFTEST ERROR It 5 70 n 0 n IS THERE A MOUSE CONNECTED is displayed Press the n key if your system does not...

Page 449: ...uctions shown at the bottom of the display to test the operation of the keys 13 If you indicated that an error occurred while testing the keys a message similar to the following is displayed 00 03 30...

Page 450: ...eyboard or Keyboard not connected Keyboard 403 8039 in Keyboard indicated a stuck key error Keyboard 405 Operator indicated that keys on Keyboard are not working properly Keyboard 406 Operator indicat...

Page 451: ...Diskette into drive A 3 Turn the power switch ON and verify that the Operating System is booted 4 Remove the MS DOS System Diskette from drive A 5 Insert the System Test Diskette into drive A 6 Enter...

Page 452: ...y the ENTER key 3 18 or later versions of Diagnostics 9 Verified list of hardware is displayed along with information on performing all tests or individual tests Select the Video Test by pressing the...

Page 453: ...MORY WORD WRITE READ ERROR 1 2049 XB800 XTFFA X5A5A X5AFF PASS BAD SEGMENT OFFSET WRITTEN READ HIT THE ENTER KEY TO CONTINUE If an error occurs record the error message and continue n n Note A blank f...

Page 454: ...he display a The first test pattern produced is shown in Figure 5 19 When comparing the pattern pay particular attention to the linearity of the lines and that the pattern is centered on the display D...

Page 455: ...rns pay particular attention to the linearity of each H row to verify the alignment of the raster I mill unit If I Hill I I m Figure 5 20 Second Monitor Test Pattern If the tests in Steps A or B above...

Page 456: ...j y j r Ti l U rt Lrc fi fiM tit lunif Ov ns o rwVi It fa Tf I 1 14 II It ii II ii4 I 11 fIl l5 4 11 r n I n II r I r 1 l 5 r rUT 0 0 fl A Vl f II J I S f f IS THE SCREEH inAGE CORRECT J 1 VES 0 MO F...

Page 457: ...screen as shown in Figure 5 22 m jiSMl Figure 5 22 Gray Scale Test Pattern If the pattern shown on the display is the same as Figure 5 22 press the y key If it is not the same as Figure 5 21 press th...

Page 458: ...nr UMDFKI NK HLjNKlN V UNDERLINE HIOfUKTENSITV IS THE SCREEMMnAGC C0RRECT7 iVvVVES B MO bv Figure 5 23 Character Attributes Test Pattern If the attributes Figure 5 24 shown on the screen are all perfo...

Page 459: ...S THIS IS THIS IS THIS IS THIS IS THIS IS THIS IS this is THIS IS THIS is PflCEr lSaC THIS PflC E this PflGE THIS PflfEr PACEf THIS PAGE fl THIS PAGES l4j THlS PAGE THIS PAGE THIS pageIv this PACE_ 1...

Page 460: ...yed after the ENTER key is pressed press the0key followed by the ENTER key to indicate a failure The patterns shown on the display should be similar to Figure 5 25 I i nc i rrx ii mc ir m i 1 11 III I...

Page 461: ...W HIGH RESOLUTIOH G1MPHICS3if i Y iS TNE SCUIl vimGI CpltlU CT7 1 YES s m W5 Figure 5 26 640 by 400 High Resolution Graphics Pattern If the pattern shown on the screen is the same as Figure 5 26 press...

Page 462: ...ssas i Figure 5 27 640 by 200 Mid Resolution Graphics Pattern If the pattern shown on the screen is the same as Figure 5 27 press the y key If it is not the same as Figure 5 27 press the n key followe...

Page 463: ...gure 5 28 320 BY 200 low RESOLUTIO FOUR COLOR GRAPHIC IS THE SCREENf IMAGE CORRECT L YES 0 i NO Figure 5 28 320 by 200 Low Resolution Graphics Pattern If the pattern shown on the screen is the same as...

Page 464: ...isplay Controller 502 Video Controller 6845 Failed Display Controller 503 Video Memory Failure Byte Check Mode Display Controller 504 Memory Disk Transfer Test Through DMA Operation Display Controller...

Page 465: ...Mode Paging Test Failed Display Controller 550 640 by 400 Graphics Mode Test Failed Display Controller 551 640 by 200 Graphics Mode Test Failed Display Controller 552 320 by 200 Graphics Mode Test Fa...

Page 466: ...N and verify that the Operating System is booted 7 Insert the Systems Test Diskette into drive A 8 Enter A system CR and wait for TESTING OPTIONS to be displayed along with ENTER DESIRED ACTION Press...

Page 467: ...re is displayed along with information on performing all tests or individual tests Select the Parallel Port Test by pressing the 6 key followed by the ENTER key 12 PAUSE ON ERROR is displayed Press th...

Page 468: ...nd turn the power switch QFF 17 Using the recorded error message and the table shown in Figure 5 30 determine the module that generated the failure and replace that module ERROR NO PROBABLE CAUSE MODU...

Page 469: ...nto drive A 3 Turn the power switch ON and verify that the Operating System is booted 4 Remove the MS DOS System Diskette from drive A 5 Insert the System Test Diskette into drive A 6 Enter A system C...

Page 470: ...IT REC STATUS 5 92 n 8 The list of installed hardware is displayed along with IS LIST OF HARDWARE CORRECT Press the y key f j followed by the ENTER key Ui 9 Verified list of hardware is displayed alon...

Page 471: ...ta Path to 8250 Failed Motherboard 702 Transmit Receive Failed Using 8250 Internal Loopback Mode Motherboard 703 Transmit Receive Failed Using Loopback Jumper Motherboard 704 8250 Interrupt Circuit Fa...

Page 472: ...erboard MFD Unit 1 Turn the power switch OFF 2 Insert the MS DOS System Diskette into drive A 3 Turn the power switch ON and verify that the Operating System is booted 4 Remove the MS DOS System Diske...

Page 473: ...Diagnostics 8 The list of installed hardware is displayed along with IS LIST OF HARDWARE CORRECT Press the y key followed by the ENTER key M 9 Verified list of hardware is displayed along with I info...

Page 474: ...or message and turn the power switch OFF 16 Using the recorded error message and the tables shown in Figures 5 32 and 5 33 determine the module that generated the failur and replace that module 5 96 n...

Page 475: ...g Random Read Test MFD Unit 806 Error During Write Protect Test See Note 808 Error During Head Alignment Test MFD Unit Note Verify that the diskette has a write protect tab present If write protect ta...

Page 476: ...t 2 Motherboard 7 0009 DMA Boundary DMA attempted to cross 64 KB boundary Motherboard 7 0008 Bad DMA DMA overrun on operation Motherboard 004 Record not found Requested sector not found 1 Diskette 2 M...

Page 477: ...the MS DOS System Diskette into drive A 3 Turn the power switch ON and verify that the Operating System is booted 4 Remove the MS DOS System Diskette from drive A 5 Insert the System Test Diskette in...

Page 478: ...00 00 PASS 1 901 10 MB HARD DISK DRIVE TIME GUT 0 0 0 1 Z0080 DRIVE TRACK HEAD SECTOR CODE 5 100 n n 7 IS THERE A MOUSE CONNECTED is displayed Press the n key if your system does not have a mouse If...

Page 479: ...Cables 2 HDU Controller 3 HDU 902 Controller Self Diagnostic Failed HDU Controller 903 Controller RAM Test Failed HDU Controller 904 Drive Self Diagnostics Failed HDU 905 Surface Verify Test Failed H...

Page 480: ...utine determines the bad block list THIS ERROR IS DETECTED ONLY FOR SYSTEM TEST PACKAGE 1 HDU Controller 2 HDU 930 Too Many Bad Blocks 1 HDU Controller 2 HDU 931 Bad Block Determination Test Failed 1...

Page 481: ...Data Corrected ECC corrected data error See Note 0010 Bad ECC Bad ECC on disk read HDU Controller 0009 Attempt to DMA across 64 KB boundary 1 HDU Controller 2 Motherboard 0007 Init Fail Drive paramet...

Page 482: ...t found Requested sector not found HDU 0002 Bad Address Mark Address Mark not found HDU 0001 Bad Command Bad command passed to disk I O error 1 Check DIP Switch on Controller 2 Check HDU Gables 3 HDU...

Page 483: ...witch OFF 2 Insert the MS DOS System Diskette into drive A 3 Turn the power switch ON and verify that the Operating System is booted 4 Remove the MS DOS System Diskette from drive A 5 Insert the Syste...

Page 484: ...displayed Press the y key followed by the ENTER key 11 When tKe Parallel Printer Test is performed you will be prompted to check the printout for errors You must answer y if the printout is correct or...

Page 485: ...abcdefghi jklmnop 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklmnopq Ol23456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH abcdefghi jklmnopqr 0123456789 ABCDEFGHIJKLMNOPQRSTUVWXYZH _ abcdefghi jklmnopqrs 0...

Page 486: ...e error message and turn the power switch OFF 13 Using the recorded error message and the table shown in Figure 5 36 determine the module that generated the failure and replace that module EKROR NO PR...

Page 487: ...ows 1 Turn the power switch OFF 1 2 InserttheMS DOSSystem Disketteintodrive A 3 Verify when the PC boots during the Resident Diagnostics I I thatthe screen displays NPU 18087PASS ROM BIOS 1 43 or grea...

Page 488: ...ENTER key 5 110 n n n n n and wait for TESTING OPTIONS to be displayed along with ENTER DESIRED ACTION Press the 0 key followed by the ENTER key 8 IS THERE A MOUSE CONNECTED is displayed Press the n...

Page 489: ...ERRUPT ERROR 13 Record the error message and turn the power switch OFF Compare the error message with the following error messages Figure 5 37 ERROR NO PROBABLE CAUSE MODULE 1801 Functional Test Faile...

Page 490: ...o drive A 3 Turn the power switch ON and verify that the Operating p System is booted 4 Removethe MS DOSSystem Diskettefrom drive A P 5 Insert the System Test Diskette into drive A 3 18 or later versi...

Page 491: ...d along with IS LIST OF HARDWARE CORRECT Press the y key followed by the ENTER key 9 Verified list of hardware is displayed along with information on performing all tests or individual tests Select th...

Page 492: ...the ENTER key Or you may run all the tests by typing 10followed by the ENTER key Return to Main Menu Returns to the Main Menu MENU A Graphic Mode The graphic mode test asks you to position the cursor...

Page 493: ...ON LEFT BUTTOM r V 5 r T iivih fL wT ife i S0 r i VJ c l V k iS v Si HI CHI BUTTOM S 1 Pr r aj vla IS THE noUSE UORKING CORRECTLV T VES T B5 HO I S4 i L trS W 2k i iL iyi V 1 k v _ i A i v 3 WK I C Fi...

Page 494: ...UTK I C c LEFTfl BUTTON T i z Ti Rir HT BUTTON r t I S MHE nousr UOHKINCi COBBECttV m tfc VESU 0s H0 n n n n n 1 1 p i n n Figure 5 39 Text Mode Test Pattern If the mouse is working correctly press th...

Page 495: ...use is not working correctly see Figure 5 40 Mouse Troubleshooting Chart ERROR NO PROBABLE CAUSE MODULE 2010 Graphic Operation Error Mouse 2020 Text Operation Error Mouse Figure 5 40 Mouse Troubleshoo...

Page 496: ...Serial Port Test proceed as follows 1 Turn the power switch OFF 2 Insert the MS DOS System Diskette into drive A 4 Remove the MS DOS System Diskette from drive A 5 Insert the System Test Diskette into...

Page 497: ...se press the y key 3 18 or later version of Diagnostics The list of installed hardware is displayed along with IS THE LIST OF HARDWARE CORRECT Press the y key followed by the ENTER key The list of har...

Page 498: ...01 8530 Serial Port DATA PATH ERROR 12 Record the error message and turn the power switch OFF Compare the error message with the following error messages Figure 5 41 ERROR CODE MESSAGE 2101 Data Path...

Page 499: ...n I 1 n n n n n n Video Option Board Display Enhancement Board Possible defective hardware Display Video Option Board n l Verifythatjumperlocation A hasajumperblockinstalled and jumper location B does...

Page 500: ...MAINTENANCE JUnPER A CLOSED OPEN JUMPER B i i i i iiii i i i i i il VERSION 1 JUMPER C JUMPER 0 Figure 5r42 Jumper Locations for Version One of the DEB D D n D n n n n 5 122 n I n n 0 n...

Page 501: ...ENANCE n n H 0 0 n JUMPER A JUMPER D CLOSED OPEN JUMPER B nz3i li 1 1 1 11 1 11 1 It1111111 1 11111 liriiiii iiiiiiir VERSION 2 JUMPER C Figure 5 43 Jumper Locations for Version Two of the DEB n 5 123...

Page 502: ...6 Insert the System Test Diskette into drive A 3 18 or later versions of Diagnostics 7 Enter A systeo CR L_ J 0 0 n 4 Turn the power switch ON and verify that the Operating A System is booted 0 n 0 I...

Page 503: ...o Option Board is present the hardware list in MENU B will include the following additional line 23 VIDEO OPTION BOARD Note This line is NOT displayed if the optional video board is not present in the...

Page 504: ...4 TEXT WITH 200 LINE GRAPHICS 5 400 LINE GRAPHICS 4 BIT PLANES FULL LUT e REDUCED LUT TEST LITTLEBIT 10 RUN ALL OF THE ABOVE TESTS Run specific tests by entering the appropriate value followed by ENTE...

Page 505: ...g text on the first line MEMORY DISK TRANSFER TEST THROUGH DMA OPERATION No error should occur during this test If any error does occur reject the DEB Please note that the Diagnostic Utility will writ...

Page 506: ...lays a full screen with the following three lines PTION BOARD TRANSPARENT MODE SCREEN SHOULD BE BASICALLY BLANK IS THE SCREEN IMAGE CORRECT y YES n NO 0 n n 0 n If any additional random character and...

Page 507: ...ING FROM LO LITE TO HI LITE ON BLACK BACKGROUND THE BACKGROUND STRIPES AT THIS LINE ARE BROKEN IS THE SCREEN IMAGE CORRECT C y YES n NO I V n n n H n n n If the following description and the actual ap...

Page 508: ...ij 0 ft 4 TEXT WITH 200 LINE GRAPHICS This selection is similar to the option 3selection and displays the same self explanatory messages Set the Contrast Control to midrange on the monitor TEXT WITH...

Page 509: ...ix color changes it will stop in a solid color display The final colors are from the center outward green light green blue white and yellow On a monochrome monitor the final picture is made up of diff...

Page 510: ...ected by the user to continue testing REDUCED LUT TEST LITTLEBIT THIS LINE OF TEXT IS NOT BLINKING THIS IS A PLAIN HI LITE WHITE LINE OF TEXT IS THE SCREEN IMAGE CORRECT C y YES n NO The user must app...

Page 511: ...est loops runs 1 Total error during testing X actual number PRESS ENTER KEY TO CONTINUE Pressing the ENTER key will produce the following data TESTING RESULTS TEST 1 ERRORS PASSES 1 TEST TITLE 2300 0...

Page 512: ...error DEB 2307 Plane 0 memory disk transfer test through DMA operation error DEB 2308 Plane 1 memory disk transfer test through DMA operation error DEB 2309 Plane 2 memory disk transfer test through...

Page 513: ...HDU To test the second hard disk proceed asfollows 1 Turn the power switch OFF 2 Insert the MS DOS System Diskette into drive A 3 Turn the power switch ON and verify that the Operating System is boote...

Page 514: ...e y key 3 18 or later versions of Diagnostics n 8 The list of installed hardware is displayed along with IS LIST OF HARDWARE CORRECT Press the y key py followed by the ENTER key 1 9 Verify the list of...

Page 515: ...t being run is displayed An error message similar to the following is displayed if an error occurs m 00 00 00 PASS 1 3401 10 MB HARD DISK DRIVE TIME OUT 0 0 0 1 Z0080 DRIVE TRACK HEAD SECTOR CODE 12 R...

Page 516: ...gnostic Failed HDU Controller 2403 Controller RAM Test Failed HDU Controller 2404 Drive Self Diagnostics Failed HDU 2405 Surface Verify Test Failed HDU 2406 Test Cylinder Write Read Tests Failed 1 HDU...

Page 517: ...ntroller 2 HDU 2412 Write and Verify Surface Failed determine Bad Block List 1 HDU Controller 2 HDU 2430 Too Many Bad Blocks 1 HDU Controller 2 HDU 2431 Bad Block Determination Test Failed 1 HDU Contr...

Page 518: ...data error See Note 0010 Bad ECC Bad ECC on disk read HDU Controller 0009 Attempt to DMA across 64 KB boundary 1 HDU Controller 2 Motherboard 0007 Init Fail Drive parameter activity fail Check DIP Sw...

Page 519: ...04 Record not found requested sector not found HDU 0002 Bad Address Mark address mark not found HDU 0001 Bad Command bad command passed to disk I O error 1 Check Switch or jumpers on HDU Controller 2...

Page 520: ...ting System has been loaded 4 Remove the MS DOS System Diskette from the MFD Unit A 5 Insert the DMA Stand Alone Diskette into the MFD Unit A and close the drive door 5 142 n The DMA Testis astand alo...

Page 521: ...ntroller Test Version X X This program tests the DMA controller for multichannel operation If the DMA has a bug the program may hang If this happens for more than 120 seconds re start the computer and...

Page 522: ...en 2 or more channels of DMA are used at the same time Most high speed tape drives and some network interface cards will be affected This is the only diagnostic that will find the problem since other...

Page 523: ...y Any changes in this voltage directly affects the 12 12 and 15 V dc The adjustment is performed by means of the potentiometer found on the power supply next to the MFD Unit connector 1 Turn the power...

Page 524: ...bserve polarity Figure 5 47 MOTHERBOARD r iav 12V DISPLAY r 6ND CONTROLLER BOARD 1 SYSTEM BOARDS GND 12V GND GND 5V INTERNAL DRIVES g g a a ULIUU g 12V GND GND r 5V SMALL EXPANSION BOX 0 a 0 POTENTIOM...

Page 525: ...n n n n n 5 Turn the power switch ON 6 Rotate the potentiometer Figure 5 47 with a screwdriver until the VOM indicates exactly 5 V dc 7 Turn the power switch OFF 8 If no further maintenance is require...

Page 526: ...ment of the following modules Power Supply Fan Motherboard Display Controller Board Bus Converter Board Mini Floppy Disk Unit XX MB Slim HDU HDU Controller Board Small Expansion Box External 10 MB HDU...

Page 527: ...oosen the two screws that secure the upper cover to the System Module Figure 5 48 n n Im n n I I ft n n Figure 5 48 Removing the Upper System Module Cover 2 Slide the upper cover forward approximately...

Page 528: ...down so the lower cover is on top 2 Loosen the two screws from the lower section of the rear panel Figure 5 49 n Figure 5 49 Removing the Lower System Module Cover 3 Slide the lower cover forward appr...

Page 529: ...F 2 Unplug the System Module power cable from the rear panel 3 Remove the upper System Module cover 4 Using a screwdriver push down the metal bar below the MFD Units assembly and slide the assembly fo...

Page 530: ...s power cables and ground connectors from the rear of the drive 0 0 n n Note Notice how the numbers on the ribbon cable connectors correspond with the numbers on the connectors at the rear of the MFD...

Page 531: ...n 6 Remove the screw that secures the ground strap to the side of the drive assembly Figure 5 51 Figure 5 51 Removing the Drive Assembly Ground Strap 7 Remove the drive assembly from the System Module...

Page 532: ...Motherboard HDU and MFD Unit from the power supply 9 Remove the 5 and GND cables from the power supply 10 Remove the screw that secures the power supply to the chassis Figure 5 52 Figure 5 52 Removing...

Page 533: ...e power supply 13 Remove the two screws that secure the fan cover and remove the cover 14 Disconnect the power cables from the fan and slide the cables and connectors through the hole in the rear pane...

Page 534: ...them through from the outside until they are flush with the inside of rear panel 5 Align the replacement fan with the inserts making sure the power connectors for the fan are at the top 6 Slide new ru...

Page 535: ...ar panel i n 3 Disconnectallcables Display Keyboard Printer etc from the rear panel of the System Module 4 Loosen the two screws that secure the lower cover 5 Invert the System Module and slide the lo...

Page 536: ...MAINTENANCE POWER LEADS TO nOTHERBGARD Figure 5 53 Motherboard Power Cable and 5 V dc GND Connectors n D n n n 0 n n n n 5 158 n 0 n 0 n n...

Page 537: ...dc and GND connectors on the Motherboard to the Display Controller 8 Unplug the MFD Unit signal cable connector from the Motherboard Figure 5 54 Q Lru LnJ Iru lrvJ lrJ LrJ I M lru LUJ lr J 0F L _ 0 F...

Page 538: ...m Module To reinstall the Motherboard perform the removal procedures in reverse order 5 160 n 0 R n Prior to installing the new Motherboard ensure that the switches and jumpers are configured the same...

Page 539: ...sion boards from the Bus Converter 6 Loosen the screws that secure the 5 V dc and GND terminals of the Bus Converter to the Display Controller n 7 Remove the 5 V dc and GND power cables from the conne...

Page 540: ...cure the upper and lower covers 4 Slide the upper cover forward approximately 0 5 inch and lift it from the System Module 5 Remove all expansion boards from the Bus Converter 6 Unplug the 15 V dc powe...

Page 541: ...E n I n n n n n 7 Loosen the two screws that secure the 5 and GND terminals of the Bus Converter to the Display Controller Figure 5 55 U SCREWS Figure 5 55 Bus Converter t 5 V do and GND Terminal Conn...

Page 542: ...Display Controller retaining bracket to the rear panel One of the screws is at the top of the retaining bracket and the other is on the rear panel under the Display connector M 10 Invert the System M...

Page 543: ...ews that secure the left panel to the chassis One of the screws is on the front one at the top of the rear panel one on the left panel and one at the rear of the chassis on the Motherboard side Figure...

Page 544: ...and loosen the two screws that secure the 5 and GND terminals of the Motherboard to the Display Controller Figure 5 57 POWER LEADS TO nOTHERBOARD Figure 5 57 Motherboard 5 and GND Terminal Connectors...

Page 545: ...the Bus Converter and Motherboard Then carefully lift the Display Controller from the System Module If installing a new Display Controller verify that the jumpers on the new controller are set the sam...

Page 546: ...Module and all external devices OFF 3 Loosen the two screws that secure the upper cover 4 Slide the upper cover forward approximately 0 5 inch and lift it from the System Module 5 168 n n n n 2 Unplug...

Page 547: ...n n n n n n R n 5 Using a screwdriver push down the metal bar below the drive assembly and slide the assembly forward to permit access to the signal and power cables Figure 5 58 o T m o f h Figure 5...

Page 548: ...of the MFD Unit s and or HDU Figure 5 59 Note Notice how the numbers on the ribbon cable connectors correspond with the numbers on the connectors at the rear of the MFD Unit s or HDU ALIGNMENT SLOT 1...

Page 549: ...ENANCE 7 Using a standard screwdriver carefully remove the screw s from the side of the assembly that secures the ground strap s and remove the assembly from the System Module Figure 5 60 Figure 5 60...

Page 550: ...remaining screws that hold the metal cover of the lower MFD Unit in place and lift the cover and the upper MFD Unit or HDU from the assembly Figure 5 61 Figure 5 61 Removal of Metal Cover 5 172 n n 0...

Page 551: ...the drive assembly and remove the MFD Unit from the base Prior to installing the new MFD Unit refer to Appendix A to verify the jumper settings Also MFD Unit A must have a Load Resistor Chip present...

Page 552: ...INTENANCE LOAO RESISTOR CHIP NOTEI JUnPER SLOCK NOTE SOME VERSIONS HAYBE SOLOERED ANO HAVE TWO JUMPER BLOCKS Figure 5 62 MFD Unit Load Resistor and Jumper Block n n n n n n n n I n n n n n 5 174 n n n...

Page 553: ...Floppy Disk Unit 1 Turn the System Module and all external devices OFF 2 Unplug the ac power cable from the rear panel 3 Loosen the two screws that secure the upper cover 4 Slide the upper cover forwa...

Page 554: ...h down the metal bar below the drive assembly and slide the assembly forward to permit access to the signal and power cables Figure 5 63 o iyl 1 m LI o V Figure 5 63 Unlocking the Drive Assembly 5 176...

Page 555: ...the ground connectors from the rear of both MFD Units Figure 5 64 Note Notice how the numbers on the ribbon cable connectors correspond with the numbers on the connectors at the rear of the MFD Units...

Page 556: ...d remove the drive assembly from the System Module Figure 5 65 n n n n 0 n Figure 5 65 Removing the Drive Assembly Ground Strap n n n n 8 Remove the remaining screws that hold the metal cover of the l...

Page 557: ...66 Removing the Metal Cover and Upper MFD Unit Prior to installing the new MFD Unit verify that the jumpers are set the same as the drive just removed Refer to Appendix A for the location and default...

Page 558: ...d all external devices OFF 2 Unplug the ac power cable from the rear panel 3 Loosen the two screws that secure the upper cover 4 Slide the upper cover forward approximately 0 5 inch and lift it from t...

Page 559: ...n n n n n 5 Using a screwdriver push down the metal bar below the drive assembly and slide the assembly forward to gain access to the signal and power cables Figure 5 67 HDU m o f Figure 5 67 Unlocki...

Page 560: ...und connector from the rear of the drives Figure 5 68 Note Notice bow the numbers on the ribbon cable connectors correspond with the numbers on the connectors at the rear of the MFD Unit and HDU 5 182...

Page 561: ...INTENANCE 7 Using a standard screwdriver remove the screw from the side of the drive assembly that secures the ground strap and remove the assembly from the cabinet Figure 5 69 6ND Figure 5 69 Removin...

Page 562: ...the remaining screws that hold the metal cover of the MFD Unit in place and lift the cover and the HDU from the assembly Figure 5 70 Figure 5 70 Removing the Metal Cover 5 184 n n n n n n n i n I n n...

Page 563: ...n n n n n 9 Remove the four screws that attach the HDU to the cover and remove the HDU from the cover To reinstall the Slim HDU Figure 5 71 perform the removal procedure in reverse order Figure 5 71 S...

Page 564: ...Module 5 Remove the screw that secures the Memory Expansion Board retaining bracket to the rear panel 6 Carefully remove the Memory Expansion Board from the Bus Converter If Bank 2 has been populated...

Page 565: ...er forward approximately 0 5 inch and lift it from the System Module 5 Disconnect the ribbon cables from the HDU Controller Note Notice how the ribbon cables are connected to the controller with the b...

Page 566: ...e DIP Switches and Jumpers are set the same as the old Controller Refer to Appendix A for information on the setting and location of P the switches and jumpers i To reinstall the new HDU Controller pe...

Page 567: ...he ac power cable from the rear panel 3 Loosen the two screws that secure the upper cover 4 Slide the upper cover forward approximately 0 5 inch and lift it from the System Module 5 Disconnect the rib...

Page 568: ...MAINTENANCE 6 Disconnect the Small Expansion Box power cable from the power supply Figure 5 72 Figure 5 72 Small Expansion Box Power Cable Connection n n n n n n i n n n n 1 n n 5 190 n n n...

Page 569: ...cket Figure 5 73 Figure 5 73 Small Expansion Box Bracket 8 Slide the Small Expansion Box forward until the tab in the front is free from the slot on the front of the chassis and remove the Small Expan...

Page 570: ...screws that secure the HDU to the Small Expansion Box chassis 12 Carefully remove the HDU and cables from the Small Expansion Box Prior to installing the new HDU verify that itis the same size as the...

Page 571: ...eyboard M Printer etc from the rear panel of the System Module _ 4 After you have determined which board Motherboard or I I Memory Expansion Board the faulty RAM chip resides on remove the appropriate...

Page 572: ...QOoa boafifiofifl ro ssa BSQSQCcn fiSfiS riOQOQQQg QOCMXSOC igyrrfBiffritfni 155 2222 bbbc 21 EMMMWm KmwmvMJ T nmuuuutnn nniiniguuui e qqq ffiyri2 n ri nHj rirt rtrirtnrtl pooooow P Bmuuuuuul Riuuuuuu...

Page 573: ...bANK 2 u 1 5 3 4 5 B 7 P Miiuii IMiuuiJ IHlllllHI pDmn V IfU l Ml pngq 11 il limumjl immt gggggggg QQQQQQ SSS vJ BBODSS P PARITY NOTE ALL THREE BANKS ARE ORDERED THE SAME Figure 5 75 Expansion Board R...

Page 574: ...tatic electricity from your hand 8 Carefully remove the faulty RAM chip using the chip extraction tool 9 Align the new RAM chip pins A with the socket B Make sure that the notch in the chip C is facin...

Page 575: ...each faulty RAM chip 11 Remove wrist strap if wrist strap was used 12 Replace the System Module cover 13 Connect the cables that were disconnected Keyboard ft Display Printer etc back to the rear pan...

Page 576: ...er normal conditions No special care is necessary except for occasional cleaning of the ball If dirt or lint builds up on the ball and prevents it from tracking properly use the following procedure fo...

Page 577: ...MAINTENANCE n n n n n n Figure 5 77 Mouse Housing n n n n n n n 5 199...

Page 578: ...move the ball from the housing 4 Clean the ball using tap water only The rubber material on the ball washes clean easily 5 Dry the ball and return it to the housing 6 Replace the ball housing cover an...

Page 579: ...he Printed Circuit Board located under the keyboard 1 Turn power switch OFF 2 Locate the troubled key 3 Place a small flathead screwdriver beneath each side of the key cap 4 Gently pry off the key cap...

Page 580: ...t Board with contact cleaner solution or light alcohol Caution Be sure that there is no cotton threads or lint left on the key mechanism or Printed Circuit Board after you have finished cleaning the c...

Page 581: ...m i M 1 i APPENDIX A...

Page 582: ...n I fmi i t...

Page 583: ...LERS A 16 HDUs Supported A 29 DISPLAY CONTROLLER BOARD A 30 Display Controller Jumpers A 30 Video Disable Option A 32 P4 Display Controller Board A 32 P8 Display Controller Board A 34 Display Enhancem...

Page 584: ...APPENDIX A SWITCHES AND JUMPERS H u n TI HARD DISK UNIT A 45 Jumper and Switch Setting A 45 AT T PC 6300 ACCEPTANCE PROCEDURE A 54 A 2 G n n n n 0 0 n n n...

Page 585: ...and Jumpers are used to define the system s configuration Any time an option is added to the system the Switches and or Jumpers reflect the addition of this option Switches The Switches used are Dual...

Page 586: ...he individual switches are OFF 0 when pushed toward the zero 0 and ON 1 when pushed toward the switch number 1 2 3 or ON labeled side of the switch In Figure A 1 all switches SWl SW8 are shown in the...

Page 587: ...and it may be located on the Hard Disk Controller Board This switch is referred to as the Drive Select Switch The individual switches are OFF 0 when the switch is pushed toward the OPEN marking and O...

Page 588: ...ns that protrude out of the circuit board and the jumper cap The individual Jumpers assume an OFF 0 state if ajumper cap is not present on the pins and an ON 1 j state if a jumper cap is present on th...

Page 589: ...Motherboard Jumpers There are five jumpers A E located on the Motherboard Figure A 3 shows the physical location of the jumper pins dQ DD SdDDDDQ 000000 DDDD DD D _DD D DD DDD DDD DD DDDDD DDDDDDDDD...

Page 590: ...ated near the Floppy Disk Controller Thisjumper is used only for production testing and should not have a jumper cap present The jumper C is physically located close to the speaker This jumper is not...

Page 591: ...Setting The AT T Personal Computer 6300 will always have at least two DIP Switches DIPSW 0 and DIPSW 1 These switches are located on the Motherboard Figure A 4 BACK DIPSU 1 nnnnnnnn 00000000 OIPSW 0 3...

Page 592: ...RAM present in the Li system and the type of memory chips used SW5 Reflects presence of 8087 Numeric Data Processor SW6 Defines type of Serial Interface Controller 8250 or Z 8530 SW7 Not used _ SW8 De...

Page 593: ...RAM 256 on Motherboard 384 on Exp Board 1 0 1 0 u X X X X 640 KB Total RAM on Motherboard 128 KB Bank 0 512 KB Bank 1 0 1 1 0 X X X X 640 KB Total RAM on Motherboard 512 KB Bank 0 128 KB Bank 1 X X X...

Page 594: ...herboard 384 on Exp Board1 0 1 0 0 X X X 0 640 KB Total RAM on Motherboard 128 KB Bank 0 512 KB Bank 1 0 1 1 0 X X X 0 640 KB Total RAM on Motherboard 512 KB Bank 0 128 KB Bank 1 X X X X 1 X X X 8087...

Page 595: ...h the MFD Units HDU and Display Figures A 7 and A 8 show the various switch settings for DIPSW 1 SWl Floppy Type SW2 Fast or Slow Startup Floppy Speed SW3 HDU Indigenous or External SW4 Not used with...

Page 596: ...xternal HDU ROM X X X 1 X X X X Reserved for Future Use X X X X 1 1 X X Reserved for Future Use X X X X 0 1 X X 40 X 25 Color X X X X 1 0 X X 80 X 25 Color X X X X 0 0 X X 80 X 25 Monochrome X X X X X...

Page 597: ...OM X X 0 X X X X X External HDU ROM X X X 1 X X X X Fast Scroll Rate X X X 0 X X X X Slow Scroll Rate X X X X 1 1 X X EGA or Video Controller Disabled X X X X 0 1 X X 40 X 25 Color X X X X 1 0 X X 80...

Page 598: ...dix A The DTC Controller is configured by setting the DIP Switches on the card The WD Controller has jumpers that must be placed Each Controller formats the hard disk drives differently therefore they...

Page 599: ...A 9 DTC Hard Disk Controller The Jl J2 and J3 connectors on the DTC Controller provide the following The Jl connector is the control connector This connector transfers the control signals to and from...

Page 600: ...er cap not present 1 jumper cap present Figure A 10 Hard Disk Controller DTC Jumpers W1 and W2 Settings Jumper W17 defines the starting address of the Hard Disk Controller PROM If the jumper cap is pr...

Page 601: ...d The PROM is disabled when the jumper cap is removed cap is normally not present Jumpers W19 and W20 define the sector size of the HDUs Figure A 11 W19 W20 SECTOR SIZE 0 0 256 0 1 512 Default 1 0 102...

Page 602: ...Controller provide the following The Jl connector is the control connector This connector transfers the control signals to and from the HDUs Two HDUs can be installed using a Daisy Chain Connection Th...

Page 603: ...5 o o o o o o o o o o o o o o o o POSITION FUNCTION 1 2 5 6 DRIVE 1 3 4 7 8 DRIVE 0 Note SWl is not actually a switch but a set of jumpers See HDU Configuration Parameter Tables Figures A 15 to A 20...

Page 604: ...ess 320H Default W4 2 to 1 I O address 324H W5 2to 3 BIOS ROM size 16 K W5 2 to 1 BIOS ROM size 32 K or 64 K Default W6 2 to 3 Reduced write current 8 heads W6 2 to 1 Head select3 16 heads Default W7...

Page 605: ...0 0 1 0 0 I 6 20 MB Seagate ST 225 CMl 4426 0 0 1 0 0 0 0 1 7 20 MB MiniScribe MS 3423 OPE XM 3220 0 0 0 0 0 0 0 1 8 20 MB CMl 4426 0 0 1 1 0 0 1 9 Not Specified 0 0 0 1 0 0 1 II 10 Not Specified 0 0...

Page 606: ...B CMI 4426 Not Specified Not Specified Not Specified Not Specified Not Specified Not Specified Not Specified SWITCH SETTING X X 0 X 6 X See Figure A 17 for Drive 1 settings t Not supported by BIOS 1 1...

Page 607: ...be MS 3425 OPE XM 5220 0 0 0 1 t8 20 MB CMI 4426 1 1 m 1 0 9 Not Specified 0 1 1 0 10 Not Specified 1 0 1 0 11 Not Specified 0 0 1 0 12 Not Specified 1 1 0 0 13 Not Specified 0 1 0 0 14 Not Specified...

Page 608: ...0 0 0 I 8 21 MB CMI 6426 0 0 1 1 0 0 1 0 9 42 MB MiniScribe 6053 0 0 0 1 0 0 1 0 10 40 MB Tandon TM 755 0 0 1 0 0 0 1 0 11 40 MB CDC WREN II Slim 0 0 0 0 0 0 1 0 12 53 MB CDC WREN II 0 0 1 1 0 0 0 0 1...

Page 609: ...1 0 10 40 MB Tandon TM 755 1 0 a 1 0 11 40 MB CDC WREN II Slim 0 0 a 1 0 12 53 MB CDC WREN II 1 1 a 0 0 13 68 MB Micropolis 1325 MiniScribe 6085 Seagate 4085 0 1 a 0 0 14 46 MB Seagate ST 251 1 0 a 0...

Page 610: ...I 0 1 0 11 40 MB CDC WREN II Slim 0 0 1 0 12 53 MB CDC WREN II 1 1 0 0 13 68 MB Micropolis 1325 MiniScribe 6085 Seagate 4085 0 1 m 0 0 14 46 MB Seagate ST 251 1 0 0 0 15 Drive 0 Only X X X X X X X X N...

Page 611: ...ameter Tables may be found in the PC 6300 Reference Manual The following HDUs are supported by the AT T PC 6300 10 MB DRIVES OPE XM 5210 Shugart SA 712 Seagate ST 212 n I i Tandon TM 252 n 20 MB DRIVE...

Page 612: ...oller Jumpers There is one jumper block located on the Display Controller Board Figure A 21 Thisjumper block has six pins 1 6 3 1 II 6 RETAINING BRACKET GND it 5 R DISPLAY CONNECTOR Figure A 21 Displa...

Page 613: ...configurations for the Display Controller Board jumper block POSITION FUNCTION 1 2 24 MHz On board Oscillator 2 3 Motherboard Oscillator Normal Position 4 5 High Resolution Board Oscillator 5 6 Clock...

Page 614: ...h board is explained in the following information P4 Display Controller Board To disable the P4 board a plug must be substituted for the chip in position 6H 74LS00 The plug with pin strap connections...

Page 615: ...APPENDIX A SWITCHES AND JUMPERS n n n n n 1 1 n n n n n n n n n n RETAINING BRACKET 1 VIDEO DISABLE PLUG LOCATION DISPLAY CONNECTOR Figure A 24 P4 Board Video Enable Disable Location A 33...

Page 616: ...l W2 and W3 Figure A 25 U1 SETTING 1 2 3 X X BOARD DISABLED X X BOARD ENABLED W1 JUMPER DC OI dl hz j ti ini II ni II cinDcmnciiiiDDCzz i us JUMPER us SETTING U2 JUMPER U2 SETTING 1 2 S X X PC 8S00 1...

Page 617: ...Jumpers The jumper locations for the two versions of the DEB are shown in Figures A 26 and A 27 JUnPER A CLOSED OPEN JUnPER 8 II II Z3CZD li i i i i i riniiiil VERSION 1 li 11 1 1 1 r 11 1 1 1 1 11 1...

Page 618: ...ENDIX A SWITCHES AND JUMPERS JUMPER A JUMPER 0 CLOSED OPEN JUMPER B II II 1 I iiiiiiiiiiii i il VERSION 2 JUMPER C Figure A 27 Jumper Locations for Version 2 of the DEB n n n n n n n 1 I n n n A 36 n...

Page 619: ...PER SETTING JUMPER FUNCTION A Closed Open No monitor connected to VDC Monitor connected to VDC B Open Closed Indicates displacement of internal addressing For future use C 1 to 2 2 to 3 PC 6300 For fu...

Page 620: ...The MFD units have jumper settings that are used to show the electrical signals and drive selection on the system Figure A 29 is an example of the jumper option connector n JUMPER OPTION CONNECTOR n...

Page 621: ...ion information is as follows Drive A The resistor pack should not be installed in drive A when installing a dual floppy drive system CPU 2 Note All MFDs come configured for drive B Toshiba Mini Flopp...

Page 622: ...APPENDIX A SWITCHES AND JUMPERS n n n 01 02 1 19 03 04 LI LO m HO 1 1 1 1 1 1 1 o 0 02 ON CLOSED 1 OFF OPEN 0 Figure A 30 Toshiba Mini Floppy Disk Unit A 40 n n n n n I n n n n D n...

Page 623: ...All DIP Switches on the OPE MFD should be set to the ON position Locations 51 and 52 with jumper caps are represented by the darkened areas SPINDLE MOTOR START TP2 JUMPER WITH MOTOR ON SIGNAL 0 WITH D...

Page 624: ...APPENDIX A SWITCHES AND JUMPERS JUMPER CAP PRESENT DEFAULT Figure A 31 OPE Mini Floppy Disk Unit Jumpers A 42 n n n n I n 0 n 0 r n n 1 J n n n n...

Page 625: ...Matsushita Mini Floppy Disk Units Figure A 32 The locations with jumpers jumper caps are represented by the darkened jareas JUMPERS A WAYS OFF I A OA IIA MS lUU RUN I li DO IX MX AX 1 X AlAVAVS ON DC...

Page 626: ...lial MN AT AX BX CX UA FPK01280 B3 Figure A 32 Matsushita Mini Floppy Disk Drive IS W 21 d X a I t H O a H O Si cj S TS H CO 13 13 a iri i 3 zj C 3...

Page 627: ...y AT T Before connecting the HDU to the system it is necessary to adjust the ohmic charge of the signal cable with the terminator resistors These resistors present on the basic board can be included o...

Page 628: ...time Jumper options DSl DS2 DS3 and DS4 determine the drive select line that will activate the interface for that drive Seven HDtJs that can be used with the AT T PC 6300 are shown in Figures A 33 to...

Page 629: ...VIEW THESE JUMPERS INCLUDE EXCLUDE THE TERMINATOR RESISTORS DRIVE SELECT 4 DRIVE SELECT 3 DRIVE SELECT 2 DRIVE SELECT i DRIVE ALWAYS SELECTED DIRECTION UNDEFINED UNDEFINED WRITE GATE HEAD SELECT 2 UND...

Page 630: ...DRIVE SELECTION JUMPER READ DATA TPS ANALOGIC TP5 6 GROUND JUMPER ALWAYS PRESENT HEADS I TP4 INDEX H 5 12V POWER SUPPLY TP1 GROUND TP2 READ DATA IMPULSE SPINDLE MOTOR SPEED ADJUSTMENT SPINDLE MOTOR IN...

Page 631: ...ITCH SWITCH SELECTION 1 2 3 4 DRIVE 1 1 0 0 0 DRIVE 2 0 1 0 0 DRIVE 3 0 0 1 0 DRIVE 4 0 0 0 1 ALWAYS ABSENT SEE DIAGNOSTIC TEST AT 134 BOARD aOSH 1234 JUMPER SWITCH ASSEMBLED ON LAST DRIVE DF THE CHAI...

Page 632: ...E SELECT 1 3 4 DRIVE SELECT 2 5 G DRIVE SELECT 3 7 8 DRIVE SELECT 4 9 10 LIFE TEST 11 12 WRITE FAULT 13 14 NO CONNECTION 14 15 RAOIH 15 13 11 9 7 5 3 1 16 14 12 10 8 6 4 2 DRIVE CONFIGURED AS DS 1 n 0...

Page 633: ...EXERCISE ROUTINE DIP SWITCH T FUNCTION B 7 6 5 4 3 2 1 DRIVE SELECT 1 1 0 0 0 X 1 1 DRIVE SELECT 2 0 1 0 0 X 1 1 DRIVE SELECT 3 0 0 1 0 X 1 1 DRIVE SELECT 4 0 0 0 1 X 1 FACTORY USE ONLY X X X X X 0 1...

Page 634: ...PRESENT DAISY CHAIN OFF ON PC BOARD DIP SWITCH cu cn I 3 333 0 CO CO CO i A rtln JUMPER PRESENT JUMPER NOT PRESENT DIP SWITCH O O O O 03J ON CLOSED 1 OFF OPEN 0 SELECTION SW1 SW2 SW3 SWA DRIVE 1 1 0...

Page 635: ...INTS 4 PIN POUER CONNECTOR J1 34 PIN CONNECTOR J2 20 PIN CONNECTOR 0 J7 1B PIN CONNECTOR DRIVE CONFIGURATION SHOWN WITH DRIVE CONFIGURED AS OS 1 rOr i I r r0r 3r 3 O 0 0 RADIAL RECOVERY nooE WRITE FAU...

Page 636: ...dure of the PC 6300 is the Customer Test Diagnostics This procedure provides a set of tests to verify the functionality of the PC 6300 modules These tests should be run On initial installation After a...

Page 637: ...n n APPENDIX B n 1 r...

Page 638: ...n n _ n i r n n...

Page 639: ...n n n n n n n n n n n n n I i n n n n n B APPENDIX B FIELD REPLACEABLE MODULES FIELD REPLACEABLE MODULES b 3...

Page 640: ...n D 0 n 0 n n1 h j 0 Q n 1 j n n n n 0 n n...

Page 641: ...n n n n n APPENDIX B FIELD REPLACEABLE MODULES n n n n n n n n n n n FIELD REPLACEABLE MODULES This appendix contains a list of field replaceable modules along with the COMCODE for each B 3...

Page 642: ...03019 ROM BIOS H L 1 21 ROM BIOS H L 1 43 8087 NDP Co Processor 845654029 105203780 403768690 Keyboard ROM I O Proc Keyboard 405018599 405018607 CRT Controller P 2 CRT Controller P 4 CRT Controller P...

Page 643: ...r Supply LA16 Powfer Supply LA16B 403351240 405204900 Keyboard 301 Keyboard 302 405162579 405007683 Monitor 313 Monitor 313 403351349 405004755 Monitor 318 Monitor 318 Monitor 318 H 403351356 40500476...

Page 644: ...k Toshiba 2 360 KB Floppy Disk Matsushita 403319080 403351430 405055278 TBA Mouse Display Enhanc Board Security Lock CRT Bridge 2 MB Expansion Board 403768666 403350945 405078585 405055245 405120858 H...

Page 645: ...ble Kit CRT Cont 15 V Cbl Mthr Brd 12 V Cbl Bus Conv 5 V GND 403816739 403816762 403846959 405055369 N A N A N A CPU2 MFD Ribbon Cbl CPUl 3 MFD Ribbon Cbl 405055391 403846918 HDU Data Cable HDU Contro...

Page 646: ...A N A N A N A CPU Fan Cover 405055344 Motherboard Speaker Motherboard Battery 405086159 405055427 CPU Upper Cover CPU Lower Cover 405055625 405055641 Keyboard Upper Cover Keyboard Lower Cover 40505548...

Page 647: ...B FIELD REPLACEABLE MODULES AT T IS PART DESCRIPTION AT T IS COMCODE Spacebar Kit Spacebar Spacebar Spring Spacebar Clip 405055419 N A N A N A Key Plunger Kit 405055443 20 MB Upgrade Kit 405249996 n...

Page 648: ...0 n n n n n n n r n n n n n...

Page 649: ...INDEX n i i n n n f i Lil...

Page 650: ...n...

Page 651: ...matic Mode 4 23 Automatic Mode Customer Test 4 22 B Banner 4 96 block diagram Motherboard 2 13 Bus Controller 2 11 Bus Converter 2 31 Central Processing Unit 2 15 character attributes Display Controll...

Page 652: ...A 34 Video Disable Option A 32 DISPLAY ENHANCEMENT BOARD OPTIONAL 2 49 Display Check 5 26 Display Controller Jumpers A 30 Display Controllers 2 27 Display Enhancement Board Jumpers A 35 Display and E...

Page 653: ...ers Optional 2 39 Hard Disk Unit Not Ready on Cold Start 5 50 Hard Disk Unit Slim 2 37 HDU Configuration 4 102 HDU Controller 2 39 HDU Drive and Controller Test 4 38 HDUs Supported A 29 heat dissipati...

Page 654: ...the Mouse Software With the Dual Diskette Computer 3 107 Installing the Mouse Software With the Dual Diskette Computer 3 107 Interrupt Controller 2 21 interrupt test 4 13 interrupts 2 21 INTRODUCTION...

Page 655: ...y Disk Drive 5 94 Mini Floppy Disk Interface 2 19 Mini Floppy Disk Unit Check 5 28 One MFD Unit and One HDU 5 33 System Will Not Access Hard Disk 5 36 Two Mini Floppy Disk Units 5 28 Mini Floppy Disk...

Page 656: ...System Module Covers 3 9 OPTION INSTALLATION Contd Replacing Mini Floppy Disk Unit With Hard Disk Unit 3 42 Troubleshooting the DEB Installation 3 97 Upgrading Memory Expansion Board Memory to 384KB 3...

Page 657: ...8 Replacing Memory Chips 5 193 Replacing Memory Expansion Board 5 186 Replacing Motherboard 5 157 REPLACING FAULTY MODULES Contd Replacing Power Supply Unit 5 151 Replacing Slim HDU 5 180 Replacing Sm...

Page 658: ...R BOARD A 30 HARD DISK CONTROLLERS A 16 HARD DISK UNIT A 45 INTRODUCTION A 3 MOTHERBOARD A 7 Mini Floppy Disk Units A 38 1 8 SWITCHES AND JUMPERS Contd Switches A 3 SYSTEM INSTALLATION 3 110 SYSTEM MO...

Page 659: ...Display Enhancement Board DEB 4 80 Video System Test 4 35 4 63 Testing HDU Drive and Controller 4 83 The Bad Track Table 4 95 Timer 2 22 TOOLS AND ACCESSORIES 1 5 Toshiba Mini Floppy Disk Unit A 39 TR...

Page 660: ...ory Expansion Board Memory to 384KB 3 27 1 Upgrading Motherboard Memory to 256KB or 640KB 3 12 n V VerifySurfaceTest 4 121 0 Video Disable Option A 32 P4 Display Controller Board A 32 _ Video Option B...

Page 661: ...0 D n Q n n n n n n n n r n n...

Page 662: ...Q OQ p Gq O ZD CU 3 C 3 C 3 IZI ZD I i i...

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