HP Cisco MDS 9020 - Fabric Switch Service Manual Download

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Summary of Contents for Cisco MDS 9020 - Fabric Switch

Page 1: ...HP 9000 Series 500 Computers Model 520 HP 9020 Service Manual Flin HEWLETT a PACKARD ...

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Page 3: ...ll rights are reserved No part of this document may be photocopied reproduced or translated to another language without the prior written consent of Hewlett Packard Company The information contained in this document is subject to change without notice Restricted Rights Legend Use duplication or disclosure by the Government is subject to restrictions as set forth in paragraph b 3 8 of the Rights in...

Page 4: ...tion with update merged Warranty Statement Hewlett Packard products are warranted against defects in materials and workmanship For Hewlett Packard computer sys tem products sold in the U S A and Canada this warranty applies for ninety 90 days from the date of shipment Hewlett Packard will at its option repair or replace equipment which proves to be defective during the warranty period This warrant...

Page 5: ...9130K Flexible Disc Drive Cleaning 1 8 Chapter 2 Theory of Operation Introduction 2 1 Power Supply Assembly 2 4 Ac Module 2 6 Primary Board 2 6 Secondary Board 2 6 Supervisor Board 2 7 Status LEDs 2 8 Power Diagrams 2 8 Processor Stack 2 12 Stack Configurations 2 12 Stack Boards 2 14 Stack Motherboard 2 14 Clock Board 2 15 Power Interlock Switch 2 15 Cooling 2 15 Memory 2 15 Memory Organization 25...

Page 6: ...rage 2 46 9130K Flexible Disc Drive Controller Card 2 47 Winchester Fixed Disc Drive liD Card 2 48 Motherboard 2 50 Power Supply 2 50 Processor Stack 2 50 Fans 2 50 Mass Storage 2 50 liD Backplane 2 50 Printer and Keyboard 2 51 liD Backplane 2 51 Display 2 51 liD Bus 2 51 Mass Storage Bus 2 51 Bootstrap Loader Card 2 52 Boot Loader ROM 2 52 Reserved Bus 2 53 liD Door Interlock 2 53 Chapter 3 Testi...

Page 7: ...Internal I O Bus 3 9 Memory 3 9 Printer 3 10 Keyboard 3 10 Display Interface Module DIM 3 10 98760A Display Alpha and GraphicS 3 10 9130K Flexible Disc Drive Controller Card 3 10 Winchester Fixed Disc Drive Controller Assembly 3 10 System Functional Tests 3 11 98760A Display Color Alignment 3 12 Overview of thE Alignment Process 3 12 When Needed 3 12 Required Equipment 3 12 Test Conditions 3 12 Ho...

Page 8: ...ay 4 27 Display Interface Module 98770A or 98780A Displays 4 28 Display AlphalInterface Board 98760A Display 4 30 Display Lid 4 31 Keyboard 4 32 Printer 4 36 9130K Flexible Disc Drive 4 47 Winchester Fixed Disc Drive 4 51 Power Supply Assembly 4 54 Power Cord 4 57 Ac Module 4 59 Line Filter 4 61 Power Switch AssemblylAc Module Cable 4 64 Processor Stack Fan 4 65 Power Supply Fan 4 66 liD Card Cage...

Page 9: ...isplay 5 20 Keyboard Configurations 5 22 Appendix A Technical Data Appendix B Installation and Test 09020 90012 Appendix C Error Messages Appendix D Motherboard Pinout Data Appendix E I O Backplane Pinout Data Appendix F Option Installation Notes Appendix G Sales and Support Offices 5955 6587 Appendix H Site Preparation 09000 90040 Appendix I 98770A Service Manual 98770 90031 Appendix J 98780A Ser...

Page 10: ...y Healing 2 28 Keyboard Block Diagram 2 31 Display Interface Module DIM 2 35 Alpha Interface Board Block Diagram 2 38 Graphics Digital Video Board Block Diagram 2 39 Printer Block Diagram 2 42 Flexible Disc Drive Controller Card Block Diagram 2 47 Winchester Fixed Disc Drive I O Card Block Diagram 2 49 Bootstrap Loader Card Block Diagram 2 53 Power up Sequence 3 2 Video Board Pots and Test Points ...

Page 11: ... 44 Removing Printhead Interconnect Board 4 43 4 45 Disconnecting Cables from Logic and Motor Drive Boards 4 44 4 46 Removing Logic and Motor Drive Boards 4 45 4 47 Separating Logic and Motor Drive Boards 4 45 4 48 Removing Paper Sensor Board and Switches Assembly 4 46 4 49 Releasing Flexible Disc Drive 4 47 4 50 Removing Flexible Disc Drive 4 48 4 51 Disassembling Flexible Disc Drive View 1 4 49 ...

Page 12: ... Digital Video Board 4 84 4 89 Removing Video Board 4 85 4 90 Removing Front Bezel 4 87 4 91 Removing CRTNoke Assembly 4 87 4 92 Preparing Degaussing Cable 4 88 4 93 Placement of Degaussing Cable on CRTN oke Assembly 4 89 4 94 Yoke Support Plate 4 89 4 95 Replacing Front Bezel 4 90 4 96 Removing Fan 4 91 5 1 Covers Exploded View 5 6 5 2 Chassis Components Exploded View 5 9 5 3 Printer Exploded Vie...

Page 13: ...ion 5 4 HP Printer Replacement Paper 5 5 Covers Parts List 5 7 Chassis Components Parts List 5 8 Printer Parts List 5 11 Processor Stack Parts List 5 13 liD Cage Parts List 5 15 AC Module Parts List 5 16 Winchester Fixed Disc Drive Parts List 5 17 Flexible Disc Drive Parts List 5 18 Keyboard Parts List 5 19 98760 Display Parts List 5 20 Self Test Error 1 Error Codes C 4 Motherboard Connectors D l ...

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Page 15: ...3 Repair Philosophy 1 4 Ac ComponentsNoltage Conversion 1 4 Safety 1 5 General Safety Procedure 1 5 Safety Guidelines for High Voltage Testing 1 5 Grounding Requirements 1 6 Printer Paper Loading 1 6 Aexible Disc Media 1 7 Computer Cleaning 1 8 Case 1 8 Air Intake Grill 1 8 9130K Aexible Disc Drive Cleaning 1 8 ...

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Page 17: ...dditional information in this manual includes Theory of Operation Troubleshooting Procedures Assembly Access Procedures Replaceable Parts Data Sheet Specifications and Options Installation and Test Error Messages Motherboard and liD Backplane Pinout Data Option Installation Notes Sales and Support Offices Note that the computer specifications and options are contained in Appendix A Also installati...

Page 18: ...icate via the common memory processor bus MPB The boards may be finstrates or polystrates Finstrates are copper cored boards with the NMOS chips bonded to them They provide the combined functions of cooling fins and ceramic substrates Cooling air is drawn through the stack between the boards to dissipate heat from the chips The boards are accessible from the left side of the computer Polystrates f...

Page 19: ...ooling for the computer The fans draw the air through a grill under the keyboard and exhaust the air out the back of the computer One fan is integral to the processor stack The other fans are mounted to the chassis one in the power supply area and one in the I O card cage area The 1 0 card cage fan operates at constant speed The other two fans are variable increasing in speed as the temperature in...

Page 20: ...ollows GP IO liD Card FSI HP IB I O Card FSI ASI I O Card FSI PSI I O Card FSI MUX liD Card FSI LAN liD Card FSI 98760A Standard Color Graphics Display FSI 98770A High Performance Color Graphics Display FSI 98780A Monochromatic Display FSI 9130K Flexible Disc Drive FSI Ac ComponentsNoltage Conversion WARNING IF IT IS NECESSARY TO REPlACE THE POWER CORD THE RE PlACEMENT CORD MUST HAVE THE SAME POlA...

Page 21: ...tages in excess of SOV dc or SOV ac root mean square RMS 1 Know each step of the test procedure Check the test setup to be sure the instruments are connected properly and that all control settings are correct 2 Never defeat interlocks 3 Never have one hand on chassis or other ground while measuring high voltages with a probe held in the other hand Use the one hand method that is probe in one hand ...

Page 22: ...age of the test leads or instruments 15 All test procedures and safety procedures should be strictly followed at all times Grounding Requirements To protect operating personnel the National Electrical Manufacturers Association NEMA recom mends that the computer chassis be grounded The computer is equipped with a three conductor power cable which when connected to an appropriate power receptacle gr...

Page 23: ... surface Both sides of the flexible disc are used for data storage By using flexible discs identified as double sided up to 264K bytes of data can be stored on each disc Refer to the appropriate programming or reference manual for details about the exact amount of available user storage Double sided flexible discs HP part number 92190A package of ten are available from HP s Computer Supplies Opera...

Page 24: ...cleaning the computer turn off the power switch unplug the power cord and remove any interconnecting cables Dampen a clean soft lint free cloth with a solution of clean water and mild soap Wipe the soiled areas of the computer ensuring that no cleaning solution gets inside the computer For cleaning more heavily soiled areas a solution of 80 clean water and 20 isop ropyl alcohol may be used Using a...

Page 25: ...0 Memory Mapping 2 22 Memory Organization 1 Megabyte RAM Board 2 25 Memory Organization 2 26 lOP Bus 2 29 Keyboard 2 30 lOP Bus Interface 2 31 Miscellaneous Status and Control 2 31 Keyboard and Input Device Scanning 2 32 Beeper 2 33 RTC NVM Logic and Enable 2 33 Power Up Power Down Sense Circuitry 2 33 Display 2 34 98770A and 98780A Display Interface Module DIM 2 34 98760A Standard Color Graphics ...

Page 26: ...or Stack 2 50 Fans 2 50 Mass Storage 2 50 I O Backplane 2 50 Printer and Keyboard 2 51 I O Backplane 2 51 Display 2 51 I O Bus 2 51 Mass Storage Bus 2 51 Bootstrap Loader Card 2 52 Boot Loader ROM 2 52 Reserved Bus 2 53 I O Door Interlock 2 53 ...

Page 27: ...puter modules are interconnected It provides cabling information connector designations and number of pins per connector Some of the functional units described in this chapter are standard in the computer and others are optional Familiarize yourself with the particular computer being serviced to know which sections of this chapter are applicable and which are not The functional units described in ...

Page 28: ...ESSOR STACK MOTHERBOARD DISPLAY CPU FINSTRATE lOP FINSTRATE lOP BUS FJAM BOARDS C j 3MASS STORAGE CONTROLLER SLOTS I BOOTSTRAP LOADER2 I KEYBOARD CONTROLLER ICONTROLLER I ELECTRONICS BOARD I KEYSWITCH 1 AVAILABLE 1 0 CARDS BOARD HP IB GPIO KEYBOARD PSI ASI RS232 9130K WINCHESTER MUX FLEXIBLE FIXED SRM DISC DISC RJE DRIVE DRIVE RGB VIDEO 2 BOOTSTRAP LOADER CARD MASS STORAGE USED IF NO WINCHESTER FI...

Page 29: ...0 J12 70 P10 70 P11 50 P13 2 P14 1RESERVED FOR EXPANSION CONTROLLER CARD S ANDIOR BOOTSTRAP LOADER CARD RESERVED FOR EXPANSION 1 0 DOOR INTERLOCK r POWER SUPPLY FAN 7 J52 t I O CARD CAGE FAN L PROCESSOR STACK FAN FLEXIBLE DISC DRIVE 8 J531 t FIXED DISC DRIVE J49 25 8 J54t f J50 50 J51 50 I __ A ____ I V V J3 50 J5 50 C 50 PC 50 TB 14 1 1 NUMBER IN PARENTHESIS IS NUMBER OF PINS PER CONNECTOR PRINTE...

Page 30: ...r or processor stack door open An ac module which mounts above the 110 card cage is connected to the assembly by a cable harness The ac module consists of an on off power switch circuit breaker line filter and wiring harness An attached male line cord plugs into the ac power source The power supply assembly is cooled by a dc box fan mounted on the rear of the mainframe The fan is not an integral p...

Page 31: ...I LOW LINE I LEVEL COMPARE START UP PULSE 5V GENERATOR REGULATOR 30KHz CLK r L LOW LINE TEMPERATURE L MONITOR OVER TEMP SECONDARY BOARD I 1 12V SUPPLY 1 19V 19V FULL BRIDGE 1 RECTIFIER H SWITCHING SUPPLY I H V SWiTCHING SUPPLY I Y 3V SWITCHING SUPPLY I H 2V SWITCHING SUPPLY I CB 2V POWER LINEAR TEMSp f NuRE SUPPLY J OVER UNDER FAULT VOLTAGE MONITOR 0 t VR 10V VR REFERENCE SUPPLY VR2 I START UP SHU...

Page 32: ...tor shutting down the power supply assembly The main power transformer has another secondary winding that provides raw power to the secondary board This power is used to generate the unregulated 19V and 19V which in turn generate all the other secondary supplies The low line detector circuitry monitors the voltage on the secondary winding of the main power transformer That voltage is transferred t...

Page 33: ...e devices The monitor also checks the 5V output and the peak power monitor from the primary board If a fault is detected the pulse width modulator is disabled the shutdown sequence is enabled and the appropriate LEDs are lit Temperature monitors check the power supply assembly thermistor described in preceding para graphs and the processor stack thermistor When the processor stack temperature exce...

Page 34: ...that no failures have been detected It also indicates that the supervisor board is enabled and capable of detecting faults and shutting down the power supply assembly if a failure is detected The other LEOs are visible at the top of the power supply assembly with the front cover removed They are labeled on the assembly and defined as follows DOORS OPEN indicates that 110 card cage door or processo...

Page 35: ... LGl J LG L J t I I n I l I 0 0 I I U lOP BUS N co 8 N N 0 0 5 E CD N I t I r 0 NOTES ii GROUND PLANE TOGROUND PLANE PRINTER MASS STORAGE CONTROL LOGIC GROUND CONNECTION CT __D_G __ DIRTY GROUND ISOLATED MOTORS A RETURN LINE 0 I t t I I 0 j 00 I WIRE CABLE 0 t t I Q r l V t Q A N 19 0 Q OPTIONAL 1 N G 3 INPUT 19 0 0 RIBBON CABLE DEVICE KEYBOARD 18 LG V 1 L J 9130K WINCHESTER FLEXIBLE FIXED DISC DI...

Page 36: ...L INPUT DEVICE 3 5 6 12 2 I j V V MOTHERBOARD V V PRINTER KEYBOARD B 12 MASS STORAGE 1 I O BACKPLANE MASS STORAGE CONTROL MASS STORAGE 2 NOTES DISPLAY CS5 5 VOLT CONTROL SENSE CS 12G 12 VOLT GROUND CONTROL SENSE CONNECTIONTOGROUNDPLANE CS5 5 CONNECTION OF 5 VOLT CONTROL SENSE OF 5 POWER LINE Figure 2 5 Voltage Sensing Diagram ...

Page 37: ...10 DOOR CASTING CASTING STORAGE 1 18WIRE 1 0 CABLE POWER SUPPLY MASS 1 0 CARDS STORAGE TO PERIPHERAL ASSEMBLY LID 2 r IPC TRACE 18WIRE STUD OPTIONAL POWER SUPPLY STUD INPUT DEVICE 1 0 BACKPLANE ASSEMBLY AND BUCKET AIR INLET STUD SCREEN IRIBBON CABLE 18 DISPLAY SCREW PROCESSOR SCREW STACK PRINTER Figure 2 6 Safety Grounding Diagram ...

Page 38: ... power and control signals The internal lOP ribbon cable connects to the lOP finstrate in slot 2 Stack Configurations The stack has 12 slots numbered from 1 to 12 with slot 1 the bottom slot and slot 12 the top All slots are interconnected by the memory processor bus via the stack motherboard The Memory Processor Bus MPB which has 32 data address lines and 12 control lines interconnects all boards...

Page 39: ...AM cards in the stack SYSTEM CLOCK MEMORY PROCESSOR BUS MPB 1 NOTES 1 MEMORY PROCESSOR BUS INCLUDES ADDRESS DATA BUSCONTROL POWER AND GROUND SELF TEST MISCELLANEOUS CONTROL 2 MEMORY CONTROLLER 3 RAM BOARDS CAN BE 256K 512K OR PAIRS OF 1MBOARDS ADE 4 REQUIRED WHEN RAM IS M UP OF SIX OR LESS 1 MEG BOARDS OR ONE CPU ON AND ONE 512K RAM BOARD ABYTE E lOP lOP BUS CLOCK BOARD I I I l I LOAD RESISTORS I ...

Page 40: ...arts the finstrate assembly itself and an attached printed circuit board The pc board is attached to the finstrate by a 50 pin connector Clamps and screws ensure a solid physical connec tion The clock buffer and the I O processor chip are on the finstrate The pc board contains the five bi directional buffer TIL packages that drive the I O bus The pc board also contains several resistor packages an...

Page 41: ...Power Supply Assembly description for details on fan speeds and temperature thresholds Memory This subsection describes the organization of RAM memory within the stack It also describes error detection and correction mapping and healing Memory Organization 256K Byte RAM Board Up to 10 RAM boards can be configured in a processor stack Each board has a Memory Controller MC and 256K 512K or 1 Megabyt...

Page 42: ...lock Diagram Memory Mapping 7 t r 16K x 8 RAM t 4 16K X 8 f 4 RAM H 16K X 8 RAM t 16K X 8 RAM The Memory Controller has a memory mapping capability which provides a translation of logical addresses on the MPB to physical addresses in RAM Mapping memory addresses from the logical address space of the MPB to the physical address space of the memory itself allows each MC to respond to only those addr...

Page 43: ...4K BYTES 4K WORDS 4K BYTES 4K WORDS 4K BYTES 4K WORDS 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES 4K BYTES _ 4_K_B Y_T E Sr_ 4K BYTES I 4K WORDS 4K WORDS 16K BYTE 4K WORDS RAM 4K WORDS 16K BYTE RAM 16K BYTE RAM 16K BYTE RAM I 4K WORDS 4K WORDS 16K BYTE 4K WORDS RAM 4K WORDS 16K BYTE RAM 16K BYTE RAM 16K BYTE RAM I 4K WORDS 4K WORDS 16K BYTE 4K WORDS RA...

Page 44: ... the MC produces a 19 bit physical memory address The address mapper sets one of four Chip Select lines to select one of four chip rows It also outputs three bits which are joined with MPB bits 18 21 to form the 7 bit Y address MPB bits 22 29 are gated in as the 8 bit X address The most significant bit of the Y address is not used The next two bits select the 1 of 4 block number The lower four bit...

Page 45: ...used to replace up to 32 failed memory words Figure 2 11 The physical address of a failed word is put in the healer CAM the corrected data is placed in the corresponding healer RAM location and bit 0 in the CAM is set to enable the address to match Subsequent accesses to this physical address are to the healer RAM instead of the failed memory causing the healer word to replace the failed word Heal...

Page 46: ...ins twice as many RAM chips on the board as the 256K RAM finstrate Figure 2 12 The RAM chips are the same as used on the 256K byte board The Me on the RAM board develops eight chip select lines four even and four odd chip select lines Each chip select line selects one row of 16K word RAM note that a chip select line in Figure 2 12 goes to every other chip in each row The effect is for a five chip ...

Page 47: ... r 1 18K X 8 r 1 18K X 8 r 1 18K X 8 RAM RAM RAM RAM T T 1 1 1 18K X 8 18K X 8 18K X 8 18K X 8 RAM RAM RAM RAM T T 1 1 r L 18K X 8 18K X 8 18K X 8 RAM RAM RAM RAM 1 1 L L 18K X 8 18K X 8 18K X 8 18K X 8 RAM RAM RAM RAM I EVEN CHIP SELECTS I 17 T 1 1 r 1 18K X 8 i 18K X 8 RAM RAM T t 1 18K X 8 18K X 8 RAM RAM T 1 18K X 8 18K X 8 RAM RAM 1 18K X 8 18K X 8 RAM RAM 1 18K X 8 RAM 1 18K X 8 RAM i 1 18K ...

Page 48: ... MAPPER CAM CS REGISTER SELECTED ADDRESS ROW 0 7 1 7 2 7 3 7 4 5 6 6 7 8 9 10 5 11 12 13 4 14 15 18 17 18 3 19 20 21 22 2 23 24 25 28 1 27 28 29 30 0 31 Y ADDRESS SELECTED X AND BLOCK NUMBER 0 4 K WORDS 4 K BYTES 1 4 K WORDS 4 K BYTES 2 4 K WORDS 4 K BYTES 3 4 K WORDS 4 K BYTES 0 4 K WORDS 1 4 K WORDS 16K BYTE 2 4 K WORDS RAM 3 4 K WORDS 0 4 K WORDS 1 4 K WORDS 16K BYTE 2 4 K WORDS RAM 3 4 K WORDS...

Page 49: ...r rows of even numbered RAM Each row of RAM has four 4K word blocks of memory for a total of 16K words four 8 bit bytes per word The row is actually comprised of five 16K by 8 bit RAM chips Each word has 32 data bits and 7 check bits for error detection and correction Data and check bits are transmitted on the Memory Data Bus The 8 line Memory Address Bus multiplexes 15 address bits The lower 8 bi...

Page 50: ...The only differences are in the physical memory address in the healer CAM The chip select portion of the address uses eight chip select lines instead of four HEALER CAM ADDRESS 0 31 0 I 10 I 11 1 31 0 Itt r l HEALED LOCATION X DON T CARE HEALER RAM DATA 31 32 39 DATA CHECK 10 BITS 29 30 MEMORY ADDRESS BITS 11 1 31 J Figure 2 15 512K Memory Healing ...

Page 51: ...n the RAM board develops eighteen physical address bits from the logical address bits on the MPB nine X address bits and nine Y address bits The multiplexed physical addresses are routed to each chip by the Memory Address Bus The X address is output first with the the Y address following Three control lines go to each RAM chip Row Address Select NRAS X address Column Address Select NCAS Y address ...

Page 52: ...er CAM the operational transaction is for this board As all memory chips are addres sed without the requirement for Chip Select signals or block addressing the nine bits of X and the nine bits of Y address are all that are required to locate the desired information in the RAM chips The MC controls when the chips are addressed by output of the NRAS and NCAS control signals along with the output of ...

Page 53: ...some programs when compared to the program speed using the 256K or 512K RAM boards This is due to the slower access time of the 1 Megabyte RAM boards Error Detection and Correction As in the other memory boards the Memory Controller detects and corrects single bit errors in data read from RAM It also detects double bit errors Each 32 bit word written to memory has a 7 bit Hamming code attached to ...

Page 54: ...tions are full the operating system checks each healed location to determine if the location is still faulty If the location fault was caused by a momentary failure the overflowed CAM can be cleared and reused by the operating system HEALER CAM ADDRESS HEALER RAM DATA o 31 o 31 32 39 DATA IC ii 10 1 31 _ ___________ 131 0 1 _ A __ I 1 HEALED LOCATION 10 11 28 29 xl X AND Y ADDRESS Ix PHYSICAL MEMO...

Page 55: ...ard printer real time clock beeper and optional input device via a single interface The beeper is a write only device with programmable frequency Data can be sent to the printer via DMA by enabling select code 6 for DMA Select code 6 is enabled for keyboard and printer interrupts at all times The real time clock is set and read via program controlled transfers One or two additional lOP finstrates ...

Page 56: ...gisters are designated as RX registers To eliminate bus conflicts with the printer which has its own bus interface circuitry the lOP bus drivers are enabled only when registers R1 R3 R9 R10 R11 R12 and R15 are accessed The printer s bus drivers are enabled when registers RO R1 R2 R4 R5 R6 and R7 are accessed R1 is shared with the keyboard driving the lower 12 hits and the printer driving the upper...

Page 57: ...te the assigned interface register on SC6 and therefore determine the circuitry to be accessed Three peripheral address lines from the lOP must match the hard wired SC6 decode circuitry to access any keyboard circuitry Miscellaneous Status and Control The following miscellaneous status and control circuits are discussed below keyboard 10 register status buffer service request latch and bus test la...

Page 58: ...en shifts into a holding register along with two status bits Shift and Control A service request signal is then sent to the lOP bus The lOP responds by reading RIO Lockout logic prevents overwriting of the keycode in the holding register for a maximum of 2 25 ms enabling it to be read by the lOP The keyboard microprocessor controls the two LEOs on the keyboard and the initial delay and repeat rate...

Page 59: ...cceeding reads or writes cause automatic increments of the address This enables blocks of data to be read or written without updating the address from the lOP The non volatile memory NVM chip contains 2048 eight bit bytes of CMOS RAM used to store configuration and service data Writing a 16 bit address to R12 in complemented form loads the address of the NVM location The data in that location is t...

Page 60: ...ion of the 98770A or 98780A display refer to the applicable service manual 98770A Color Graphics Display Service Manual 98780A Monochromatic Display Service Manual The 98770A and 98780A displays have an associated Display Interface Module DIM mounted below the display The DIM is described below The 98760A display theory of operation follows the DIM description 98770A and 98780A Display Interface M...

Page 61: ...he buffers split into an alpha path and a graphics path Graphics data and control information are transferred directly to the display Alpha data is gated into the alpha data buffer Control signals are also exchanged between the interface buffers and the controller The output status flag enable OSFE signal enables Status and Flag to the lOP bus The lower 8 lines of the data bus provide an 8 bit wid...

Page 62: ... from shift register 1 to the display while loading shift register 2 with another 80 character row from the frame buffer When the transfer is complete the buffer toggles the registers and begins shifting the contents of shift register 2 to the display while reloading shift register 1 from the frame buffer This process continues until an entire frame has been transferred to the display Timing signa...

Page 63: ...ves data from the CPU buffers it in RAM and displays it on the CRT screen The display is a memory mapped raster scan CRT A total of 256 characters can be displayed including all 128 ASCII characters The display uses either the English or Japanese Katakana character set depending on which ROM is selected and inserted at the factory Character display matrix is 720 dots horizontal by 390 dots vertica...

Page 64: ...s it in the alpha memory or passes it on to the graphics digital video board At the appropriate time data stored in the RAM is read out and sent to the character and attribute ROMs on the graphics digital video board The alpha interface board functions are controlled by a 6845 CRT alpha controller chip Functions include interface logic timing and control logic Alpha timing signals are provided to ...

Page 65: ... digital video board also has a 51 MHz crystal oscillator which provides timing signals to both the alpha interface and graphics digital video boards The board has a sync generator circuit which provides the vertical and horizontal sync signals and the vertical blanking signal to the video board Three digital to analog converters on the graphics digital video board convert the 12 bit digital outpu...

Page 66: ...ormer is utilized for this function Potentiometers on the sweep board control the focus intensity vertical centering and height and horizontal centering of the CRT display A coil on the sweep board controls the horizontal width CRTNoke Assembly The CRT yoke assembly displays the video signals The resulting display is 25 lines by 80 charac ters per line The graphics is 512 dots horizontal by 390 do...

Page 67: ...ately Normal ASCII characters are entered into an 80 byte print buffer which is printed upon receipt of the 81st byte or upon receipt of an appropriate control code The printer responds to a subset of ASCII lower and upper control codes as soon as it receives them Undefined control codes are ignored and do not contribute to the character count in the internal print buffer Escape sequences are prin...

Page 68: ...II J PH I SUPPLY I POWER BUS LOGIC BOARD MICROPROCESSOR RAM ROM MONITOR AND LOGIC CIRCUITS J U I I PRINTHEAD RESISTOR J4 J 51 _ _t C 0 N TR 0 L M 0 N IT 0 R 1 MEASURING CIRCUIT J1 J4 DOT SHIFTER J2 J4 t BURN CtEAR HDOUT 3 L _____________ _19 ISHurif6WNI r L JM M O T O R C O N TR O L i I t I ii t r I I J21L ________ I__DA_T_A _SH_I_FT_ __1 2 i IJ51 J PAPER I L ____ P A PE R _____ _____1 SENSE J S _...

Page 69: ...n interface registers RO Rl R2 R4 R5 R6 and R7 are accessed Rl is shared with the printer driving only the upper 4 bits of RI Writes to RO R2 R4 R5 R6 and R7 clock data from the lOP into the data register Interface commands are specified by writes to R5 The command is written to R5 and command parameters are written to R7 The lOP reads printer status by a read of RO R2 R4 R5 R6 or R7 The printer r...

Page 70: ...averts damage to the printhead circuitry When the printer goes into idle state this circuitry is also enabled The idle state also reduces the motor current to one third of normal power and shuts off the current to the paper sensor LED Motor Drive Control and Shutdown This circuitry provides voltage and control signals to the printer stepper motor Five control signals from the microprocessor on the...

Page 71: ...ese connections A 16 pin section of the connector is cabled to motor drive board connector JPH providing power to the printhead A 6 pin section is cabled to logic board connector J2 routing data and control signals to the printhead Power is supplied by the printhead interconnect board to the head substrate on the printhead by a head voltage supply cable Elastomeric connectors transmit data and con...

Page 72: ...formation for the 9130K can be found in the HP 9130K Flexible Disc Drive Service Manual Part No 09130 90030 The 110 backplane has three mass storage controller slots located below the four 110 slots Figure 2 1 These slots contain the appropriate controller cards for the selected mass storage configura tion Only two of these slots have connectors The 9130K Flexible Disc Drive controller card plugs ...

Page 73: ...card All lOP signals are on the left side of the diagram and all disc signals are on the right side The PA and Register Decode circuitry inputs the NPA peripheral address NIC register select and READ lines to enable the appropriate register on the controller when the correct select code PA state is applied The Buffers Latches and ID Response circuitry is the electrical interface for the 16 data li...

Page 74: ...lization and ID field verification on the disc The Pre Compensation circuitry inputs the serial write data produced by the 8876 and pre distorts it to correct for shifts in the apparent position of pulses on the disc The Phase Locked Loop PLL reconstructs a clock from the encoded pulses coming from the disc This reconstructed read clock and the original data pulses are sent to the 8876 The sync de...

Page 75: ...d the FIFO manager The 8039 microprocessor operates at 10 MHz has 128 bytes of internal RAM and supports up to 4K byres in an 8K byte external program ROM The microprocessor 1 performs a self test of the interface after a reset 2 performs the boot load function for the computer including 10 ROM operation for protectiion of software rights 3 sends command data information to from the disc controlle...

Page 76: ...rs Each of the three power supply boards plugs into two motherboard connectors The boards and the associated motherboard connectors are as follows Primary Board J42 12 pin J43 70 pin Secondary Board J46 36 pin J47 50 pin Supervisor Board J44 24 pin J45 50 pin Processor Stack The processor stack plugs directly into the motherboard via two 25 pin motherboard connec tors J48 and J49 The motherboard d...

Page 77: ...tstrap loader card e Other connections reserved for future use Translates between the lOP and 110 cards Provides a connection for the 110 door interlock switch The backplane plugs into the motherboard via 96 pin receptacle header J12 Most of the motherboard signals are routed to the display the four 110 slots and the two mass storage slots Display Backplane connectors PI and P2 provide power and 1...

Page 78: ... system control logic The loader ROM is configured for byte addressing only The 16 bit counter consists of two dual 4 bit counters which address the ROM directly The counter is automatically incremented after reading a byte of data from the ROM The counter is reset to address 0 with the IFC signal or by reading FR3 the ID register The control logic determines which data to place on the 110 lines w...

Page 79: ...provide three plug in slots Power and signal lines are provided at the connectors P13 is a 50 pin ribbon cable connector All four connectors are reserved for future use I O Door Interlock A switch mounted on an 110 card gUide is connected by a cable to P14 a 2 pin plug on the 110 backplane When the 110 door is opened a signal is sent through P14 to the motherboard The motherboard passes the signal...

Page 80: ...2 54 Theory of Operation ...

Page 81: ...isc Drive Controller Card 3 8 Winchester Fixed Disc Drive Controller Assembly 3 8 Bootstrap Loader Card 3 8 Self Test Supervisory Code 3 9 Internal 110 Bus 3 9 Memory 3 9 Printer 3 10 Keyboard 3 10 Display Interface Module DIM 3 10 98760A Display Alpha and Graphics 3 10 9130K Flexible Disc Drive Controller Card 3 10 Winchester Fixed Disc Drive Controller Assembly 3 10 System Functional Tests 3 11 ...

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Page 83: ... whether the computer is operational enough to run diagnostics If the initial isolation procedures indicate that the computer can run diagnostics continue troubleshooting by performing the module self tests and system functional tests as described in Appendix B The troubleshooting procedures and diagnostics are designed to enable fast fault isolation to a replaceable module Almost every replaceabl...

Page 84: ...le for Each Peripheral Address PA Look for as on Removeable Media On lOP 1 2 and 3 On PA 0 1 7 and Report Errors Look for as on Fixed Media On lOP 1 2 and 3 On PA 0 1 7 and Report Errors Send Loader Done Message to Output Modules Jump to as which Runs Self Test Supervisory Code Figure 3 1 Power up Sequence Send Error Message to Output Modules ...

Page 85: ...s 5 and 6 3 Remove the front cover and observe the DOORS OPEN STACK TEMP and SEC BOARD LEOs a If DOORS OPEN is lit close processor stack door and or I O door and cycle power b STACK TEMP lit indicates overtemperature in processor stack Allow computer to cool check for obstructions to airflow in front and back and cycle power Check processor stack fan c SEC BOARD lit indicates power supply assembly...

Page 86: ... some modules more information is available via a self test status register which is accessible via the operating system Module self tests provide low level diagnostics which can diagnose a problem to the replaceable module level even if the CPU or lOP bus has also failed Each module s self test is independent of the functionality of other modules Self Test Supervisory Code The STSC is resident in...

Page 87: ...tuations a power supply supervisory circuit latches the state of the LEOs and they continue to indicate as long as the line cord is plugged in and the power switch is on Processor Stack All of the processor stack boards have self tests which are initiated by a sequence of NSYSPU and NPI triggered by powerup LEOs visibly indicate the results of the self tests The LEOs are visible by removing the le...

Page 88: ...rocess The memory test consists of pattern testing the memory to distinguish between non existent mem ory good RAM and RAM with hard failures If a faulty location is detected a flag is set to indicate that the 16K byte memory block in which the failure was detected is suspect The self test supervis ory code tests these blocks later to determine if the failure is correctable or if the block should ...

Page 89: ...When the BASIC operating system begins to run it turns the PRINT ALL LED off and turns the CAPS LED back on When HP UX runs both the PRINT ALL and and CAPS LEOs are off With an operating system installed pressing CAPS and checking the toggling of the LED verifies keyboard operation Successful keyboard operation means that the keyboard processor and scanning circuits are working The self test super...

Page 90: ...ller assembly consists of an 110 card and controller board The self test is initiated at powerup or on a SCRATCH ALL or LOAD BIN The 110 card is tested first The test begins by verifying the internal operations of the 8039 microprocessor including internal RAM Then the 8039 timer is tested If successful the 8039 then tests the message and control registers followed by the control logic for the FIF...

Page 91: ...subsystem The test determines whether or not the 110 bus is functional Loopback sequences are initiated to each device before command sequences are initiated A loopback test writes a data value to a register and then reads the value More complex tests are initiated after loopback passes The 110 bus test progresses from the device which is electrically nearest to the lOP to the device which is the ...

Page 92: ...of the line buffer chip The code also tests the display buffer memory The code issues a message to the user if a failure is detected 98760A Display Alpha and Graphics The STSC tests the alpha interface board and the graphics digital video board The test initializes the alpha controller and checks status It performs alpha memory tests with four patterns all 0 s all l s alternating l sand 0 s and al...

Page 93: ...l computer hardware and I O cards to at least a 95 confidence level The information returned is detailed enough to enable isolation to a field replaceable module The diagnostics reside on flexible discs provided with each computer and Tools Product Support Package Information required to load and run the tests can be found in the System Functional Test User s manual 09020 11031 09020 90037 rev 1 8...

Page 94: ...CRTIyoke assembly are replaced It should be performed even if the display looks acceptable to the eye since reliability is significantly diminished in an incorrectly aligned display even if the CRT looks accept able In addition the intensity adjustment should be made whenever a given graphics output differs from display to display Required Equipment The following equipment is required for 98760A c...

Page 95: ...d plus gain This procedure is then repeated for the cathode with the middle cut off and once again for the cathode with the high cut off The Intensity Adjustment Procedure Now that you know when to perform the intensity adjustment and how it works you are ready to start the actual procedure Using the System Functional Test discs first load the test operating system Test O S Then load the mainframe...

Page 96: ...3 14 Testing and Troubleshooting HORIZONTAL CENTER VERTICAL HEIGHT SCREEN GRID FOCUS Figure 3 3 Sweep Board Adjustments ...

Page 97: ...from medium to high speed When high speed is required for proper cooling a message is issued to the user providing notice that shutdown is imminent if temperature increase continues If the temperature at the power supply sensor exceeds 97 C or the processor stack CPU sensor senses a temperature greater than 100 C the power supply shuts down and one of the over temperature LEOs on the power supply ...

Page 98: ...yte 45 Bytes 46 47 Bytes 48 53 Bytes 54 57 Bytes 58 60 Byte 61 Bytes 62 63 Second Clock Check Byte Minute Stack Size two times number of boards Hour Century Day of Week Day of Month Month Year Control Registers Timer Resolution Timeout Scan Resolution Keyboard Initialization Data Default System Startup Subsystem Default Mass Storage Unit Specifier Size of System 110 Buffer NVM Checksum Healer CAM ...

Page 99: ...embly 4 15 Bootstrap Loader Card 4 18 Processor Stack 4 18 Display 4 27 Display Interface Module 98770A or 98780A Displays 4 28 Display AlphalInterface Board 98760A Display 4 30 Display Lid 4 31 Keyboard 4 32 Printer 4 36 9130K Flexible Disc Drive 4 47 Winchester Fixed Disc Drive 4 51 Power Supply Assembly 4 54 Power Cord 4 57 Ac Module 4 59 Line Filter 4 61 Power Switch AssemblylAc Module Cable 4...

Page 100: ......

Page 101: ...al sections as follows General Safety Procedure Electrostatic Discharge Case Parts Replaceable Assemblies The Case Parts subsection describes how to remove major case parts to provide access to replace able assemblies The Replaceable Assemblies subsection describes how to access and replace assemblies Each replaceable assembly access procedure references one or more of the case part removal proced...

Page 102: ... continuity test between power cord ground and metal chassis Record results on Repair Order CAUTION THE COMPUTER HAS ASSEMBLIES AND COMPONENTS SENSI TIVE TO ELECTROSTATIC DISCHARGE READ THE FOLLOWING SECTION AND OBSERVE THE PROCEDURES TO AVOID DAM AGE TO THE COMPUTER AND ITS PARTS Electrostatic Discharge Electrostatic discharge ESO causes failure in many PC assemblies other assemblies and compo ne...

Page 103: ...and subassemblies are to be treated with the same care as good devices Otherwise further damage may result which prevents tracing the cause of the original failure Before removing devices from protective container a Clear work area of static hazards such as plastic cups bags envelopes and papers b Connect wrist strap c Neutralize charges of ESO protective packaging containing an ESO sensitive item...

Page 104: ...ards and finstrates are to be handled only by grounded personnel If possible they should be held only by the ejectors If necessary they can be handled by the side edges Case Parts The following paragraphs describe how to open and remove the side doors and remove the front and rear covers Side Doors Identical doors one on each side of the computer provide service access to the computer Figure 4 1 T...

Page 105: ...rom the computer Allow door to rest on its hinges in the open position Close door by swinging it up and snapping it in place Figure 4 2 Opening Side Door The left door must be removed to gain access to the bottom three processor stack slots The right side door must be removed so that the mass memory controller cards and 110 backplane can be removed ...

Page 106: ... from hinge pins Figure 4 3 Figure 4 3 Removing Side Door Front Cover including Keyboard Bezel The front cover is removed to provide access to the keyboard printer mass storage devices and other assemblies To remove the front cover perform the following procedures 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Open both side doors as previously described ...

Page 107: ...emove keyboard bezel by grasping as shown in Figure 4 4 and pulling up on bezel Raise front of bezel until back of bezel clears front cover and bezel can be pulled out and away from computer Figure 4 4 Removing Keyboard Bezel ...

Page 108: ... Assembly Access 4 Loosen two 2 Pozidriv captive screws that hold front cover to computer Figure 4 5 HIDDEN 2 POZIDRIV CAPTIVE SCREW Figure 4 5 Releasing Front Cover 5 Remove paper tray from under display ...

Page 109: ...ving Front Cover Rear Cover including Display The rear cover is removed to provide access to the power supply ac module fans and other assemblies The display must be removed in order to remove the rear cover To remove the display and rear cover perform the following procedures 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET ...

Page 110: ...ward front of computer unlatching display from support legs Figure 4 7 DISPLAY LATCH Figure 4 7 Unlatching Display WARNING THE DISPLAY MAY BE HEAW TO AVOID PERSONAL INJURY OR DAMAGE TO EQUIPMENT TWO PEOPLE MAY BE REQUIRED TO LIFT THE DISPLAY FIGURE 4 8 ...

Page 111: ...ter and place in a safe area where it does not interfere with continued disassembly 4 Open both side doors as previously described 5 Loosen six 2 Pozidriv captive screws that hold rear cover to computer Figure 4 9 Figure 4 9 Removing Rear Cover 6 Lift rear cover off computer ...

Page 112: ... Cards 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Open right side door as previously described 3 Loosen two captive thumbscrews on 110 door Figure 4 10 and swing door open allowing door to rest in open position Use flat blade screwdriver to loosen thumbscrews 110 DOOR liD DOOR CAPTIVE THUMB SCREW Figure 4 10 Opening 1 0 Door 4 Disconnect 110 cable connector from 110 card to be replaced Figure 4...

Page 113: ...Ejectors should be flush with 1 0 card when card is fully seated 9130K Flexible Disc Drive Controller Card 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove right side door as previously described 3 Remove three 2 Pozidriv screws from mass storage cover Figure 4 12 MASS STORAGE COVER 1 0 DOOR 2 POZIDRIV MASS STORAGE COVER SCREW 1 0 DOOR CAPTIVE THUMB SCREW Figure 4 12 Removing Mass Storage Cove...

Page 114: ...ACE CARD IN ANTISTATIC BAG OR ON ANTISTATIC SUR FACE 7 Remove cable connector from card Figure 4 13 unseat card from 110 backplane by pulling out on ejector and slide card out of slot CABLE CONNECTOR EJECTOR FLEXIBLE DISC DRIVE CONTROLLER CARD Figure 4 13 Removing Flexible Disc Drive Controller Card Reassembly Note Seat replacement controller card firmly in 110 backplane and push ejec tor and hand...

Page 115: ... to rest in open position Use flat blade screwdriver to loosen thumbscrews 5 Slide mass storage cover toward front of computer disengaging cover from slot in front card guide 6 Lift mass storage cover with attached I O door up and away from computer CAUTION CAREFULLY HANDLE ASSEMBLY TO PREVENT DAMAGE FROM ELECTROSTATIC DISCHARGE OR OTHER CAUSES HOLD BY EJECTORS OR SIDE EDGES ONLY DO NOT TOUCH EDGE...

Page 116: ...embly Figure 4 15 and remove card POWER CONNECTOR DISC CONTROLLER 34 PIN CONNECTOR 50 PIN CONNECTOR 2 POZIDRIV SCREW Figure 4 15 Disassembling Fixed Disc Drive Controller Assembly View 1 CAUTION REMOVE THE LOADERIID ROM FROM THE OLD CARD AND IN STALL IT ON THE NEW CARD WHEN REPLACING THE 1 0 CARD USE TOOL 8710 0585 IF ORDERING A NEW 10 ROM THE SERIAL NUMBER OF THE COMPUTER MUST BE PROGRAMMED INTO ...

Page 117: ...h disc controller to controller assembly Figure 4 16 4 Remove disc controller just far enough to disconnect 20 pin and 34 pin connectors from controller Figure 4 16 5 Remove power cable and 50 pin cable from disc controller DISC CONTROLLER 2 POZIDRIV SCREW 20 PIN CONNECTOR Figure 4 16 Disassembling Fixed Disc Drive Controller Assembly View 2 Note Retain all cables and screws for installation of re...

Page 118: ...subassemblies except the fan are listed below followed by their access procedures Fan access procedures follow in this chapter Boards Clock Board Motherboard Stack Boards The processor stack has 12 slots Access to the lower three slots requires procedures that differ from those necessary to gain access to the upper nine slots Both procedures are documented below Slots 4 12 1 UNPLUG COMPUTER POWER ...

Page 119: ...d out of the slot If lOP finstrate slot 4 is being removed pull out on ejectors slide board slightly out open connector gate remove ribbon cable connector Figure 4 18 and then remove board from stack EJECTOR lOP 3 SLOT 4 RIBBON CABLE CONNECTOR CONNECTOR GATE Figure 4 18 Removing Upper Board View 2 Reassembly Notes When installing board hold by ejectors and use side edge of board to move air contro...

Page 120: ...2 Pozidriv screws that hold trim piece to left side of computer Figure 4 19 just far enough to remove trim piece Remove trim piece by pulling straight off while leaving screws in place on computer TRIM PIECE 2 POZIDRIV SCREW Figure 4 19 Removing Trim Piece 4 Disconnect lOP expander cables if present from processor stack door Figure 4 17 ...

Page 121: ...OZIDRIV SCREW Figure 4 20 Removing Processor Stack Door CAUTION BEFORE REMOVING PROCESSOR STACK DOOR AS DESCRIBED IN THE FOLLOWING STEP NOTE THAT INTERNAL lOP EXPAN DER CABLES MAY INTERCONNECT THE DOOR WITH ADDI TIONAL lOP FINSTRATES THESE CABLES MUST BE DISCON NECTED FROM THE FINSTRATES BEFORE THE DOOR CAN BE COMPLETELY REMOVED ...

Page 122: ...OP Cables CAUTION CAREFULLY HANDLE BOARD TO PREVENT DAMAGE FROM ELECTROSTATIC DISCHARGE OR OTHER CAUSES HOLD BY EJECTORS OR SIDE EDGES ONLY DO NOT TOUCH EDGE CON NECTOR CONTACTS OR BOARD PLANES IMMEDIATELY PLACE BOARD IN ANTISTATIC BAG OR ON ANTISTATIC SURFACE 7 If board in slot 1 or 2 is being replaced disconnect internal lOP cable from lOP finstrate in slot 2 Figure 4 21 8 Pull out on ejectors t...

Page 123: ...es if present from processor stack door Figure 4 17 4 Loosen two captive thumbscrews on processor stack door Figure 4 20 and swing door open allowing door to rest in open position CAUTION CAREFULLY HANDLE BOARD TO AVOID DAMAGE FROM ELEC TROSTATIC DISCHARGE OR OTHER CAUSES HOLD BY EJEC TORS OR SIDE EDGES ONLY DO NOT TOUCH EDGE CONNEC TOR CONTACTS OR BOARD PLANES IMMEDIATELY PLACE BOARD IN ANTISTATI...

Page 124: ... way and onto board Insert board firmly in stack motherboard and push ejectors in to lock board in place The clock board connector and mating motherboard connector are not keyed however the clock board screws and motherboard holes do not align unless proper connection is made Firmly tighten stack door thumbscrews to prevent RFI radiation 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove left do...

Page 125: ...T INTERNAL lOP EXPAND ER CABLES MAY INTERCONNECT THE DOOR WITH ADDITION AL lOP FINSTRATES THESE CABLES MUST BE DISCONNECTED FROM THE FINSTRATES BEFORE THE DOOR CAN BE COM PLETELY REMOVED 7 Loosen two captive thumbscrews on processor stack door Figure 4 20 and remove door Disconnect internal lOP expander cable s if present from lOP finstrate s Figure 4 21 8 Disconnect internal lOP cable from lOP fi...

Page 126: ...Access 10 Disconnect fan cable from processor stack fan Figure 4 24 Figure 4 24 Disconnecting Processor Stack Fan Cable 11 Lift processor stack up and out of computer Figure 4 25 Figure 4 25 Removing Processor Stack ...

Page 127: ...hey attach the motherboard supports to the motherboard 18 Remove eight 1 Pozidriv screws four at bottom and four at back that attach the connector tie bar to the case 19 Remove the motherboard and its attached supports and connector tie bar from the case 20 Remove the connector tie bar and motherboard supports from the motherboard Retain for installation on the replacement motherboard Display The ...

Page 128: ...ve display as previously described and carefully place display on its top Note When performing the following step leave screws in place in aluminum casting to avoid losing them 3 Loosen 11 2 Pozidriv screws that attach aluminum casting to display and remove casting Figure 4 26 2 POZIDRIV SCREW Figure 4 26 Removing Casting ...

Page 129: ...face module DIM straight off of lid Figure 4 27 DIM Figure 4 27 Removing DIM Reassembly Note Ensure that the DIM is properly aligned on the display lid before replac ing the aluminum casting Otherwise casting screws do not align with lid holes ...

Page 130: ...v screws that attach aluminum casting to display and remove casting Figure 4 26 4 Disconnect both cables and remove 13 2 Pozidriv screws from the alpha interface board Figure 4 28 ALPHA INTERFACE CABLE CONNECTORS Figure 4 28 Removing Alpha Interface Board 5 Pull alpha interface board straight off of lid Reassembly Note Ensure that the alpha interface board is properly aligned on the display lid be...

Page 131: ...ess 4 31 Display Lid The DIM or alpha interface board is mounted to the display lid To remove the lid remove eight 2 Pozidriv screws and lift lid off of display Figure 4 29 2 POZIDRIV SCREW Figure 4 29 Removing Lid ...

Page 132: ...mblies listed above except keycaps require that the keyboard be removed from the computer To remove the keyboard from the computer proceed as follows 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove front cover and keyboard bezel as previously described 3 Disconnect ground strap connector at top left of keyboard from lug on computer Figure 4 30 4 Loosen four 2 Pozidriv captive screws that atta...

Page 133: ...EMORY RTC NVM BAT TERIES ARE CONTAINED ON THE BOTTOM SIDE OF THE KEYBOARD CAREFULLY HANDLE KEYBOARD TO AVOID LOS ING RTC NVM DATA 5 Grasp keyboard by round handles as shown in Figure 4 31 and lift keyboard up and away from computer Figure 4 31 Removing Keyboard ...

Page 134: ...nd insert beside keycap to be removed as shown in Figure 4 32 Figure 4 32 Removing Keycap 2 Pull tool firmly upwards to remove keycap from keyswitch Note Keycap part numbers and drawings of the various language keyboards are in Chapter 5 Reassembly Note Install the new keycap by pressing it firmly into place on the keyswitch ...

Page 135: ...ectronics board off keyswitch board RTC NVM BATTERY INTERCONNECTING LANGUAGE ASSEMBLY CABLE RESISTORS KEYBOARD ELECTRONICS BOARD Keyswitches 1 POZIDRIV SCREW KEYSWITCH BOARD Figure 4 33 Disassembling Keyboard 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove keyboard from computer as previously described and place on antistatic surface 3 Remove keycap from defective keyswitch 4 Remove keyboard ...

Page 136: ...ation Resistor part number is 0698 3441 Table 4 1 Keyboard Language Resistor Configurations R16 R17 R22 R23 English ASCII 1 1 1 1 Katakana Japanese 1 1 0 1 Svenska Swedish 1 0 1 1 Suameks Finnish 1 0 1 1 Espanal Spanish 1 0 0 1 Deutsch German 1 1 1 0 Francais French 1 1 0 0 Real Time Clock Non Volatile Memory RTC NVM Battery Assembly 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove keyboard fr...

Page 137: ...WER CORD FROM AC OUTLET 2 Remove front cover as previously described 3 Disconnect ground cable connector from lug on computer Figure 4 34 2 POZIDRIV SCREW HIDDEN GROUND CABLE CONNECTOR Figure 4 34 Releasing Printer 4 Loosen two 2 Pozidriv screws that attach printer to computer Figure 4 34 5 Grasp printer Figure 4 35 and lift printer up and out of computer Figure 4 35 Removing Printer ...

Page 138: ...es Figure 4 36 4 Remove 2 Pozidriv screw washer and nut that attach ground cable and strap to side of printer and remove ground cable Figure 4 36 GROUND STRAP HEX HEAD BOLTS TRANSPARENT COVER GROUND CABLE SIGNAL POWER CABLES Figure 4 36 Disassembling Printer 5 Remove two 7 16 inch hex head bolts and associated springs that attach transparent cover to printer Figure 4 36 and remove transparent cove...

Page 139: ...ur 2 Pozidriv screws two on each side of printer that attach head load bar to printer Figure 4 38 and remove head load bar Figure 4 39 7 Place printer on its back Figure 4 38 Releasing Head Load Bar Figure 4 39 Removing Head Load Bar ...

Page 140: ...emove two 5 16 inch hex head bolts Figure 4 40 one from each side of printer and pull printhead assembly straight out of printer HIDDEN 5 16 INCH HEX HEAD BOLT Figure 4 40 Removing Printhead Reassembly Notes After installing printhead assembly and installing printer in the compu ter set adjustment cams for optimum print quality Thoroughly clean transparent plastic cover before installing on printe...

Page 141: ...PERFORM ING THE FOLLOWING PROCEDURE OR DAMAGE TO THE PRINTHEAD COULD RESULT 1 Support printhead assembly at both ends for easy working access and to prevent damage to the capacitors Figure 4 41 2 Remove five 2 Pozidriv screws and lock washers that attach ground strap and two heat sinks to printhead assembly Figure 4 41 and remove ground strap and heat sinks 2 POZIDRIV SCREW AND WASHER GROUND STRAP...

Page 142: ...AD BACKING PLATE COULD RESULT FROM PLACING IT ON THE SURFACE THAT CONTACTS THE CHIP MODULES 3 Remove five 2 Pozidriv screws and washers that attach head backing plate to printhead and remove head backing plate Figure 4 42 Turn head backing plate over and place on its top 2 POZIDRIV SCREW AND WASHER Figure 4 42 Removing Head Backing Plate ...

Page 143: ...fting at both ends Figure 4 43 Figure 4 43 Removing Chip Carrier 5 Remove printhead interconnect board by lifting at both ends and disconnecting two connec tors from the board Figure 4 44 CONNECTOR PRINTHEAD INTERCONNECT BOARD Figure 4 44 Removing Printhead Interconnect Board ...

Page 144: ...late and modules to be flush or damage could result Remember to replace ground strap when installing heat sinks Logic Board Motor Drive Board To remove the printer and separate the logic board from the motor drive board proceed as follows 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove printer from computer as previously described 3 From front of printer disconnect two signal power cables one...

Page 145: ...Removing Logic and Motor Drive Boards 7 Disconnect ribbon cable from logic board Figure 4 47 8 With needlenose pliers squeeze four plastic pins that interconnect the two boards Figure 4 47 force pins out of logic board and lift logic board off motor drive board INTERCONNECTING PIN MOTOR DRIVE BOARD RIBBON CABLE LOGIC BOARD Figure 4 47 Separating Logic and Motor Drive Boards ...

Page 146: ...er Figure 4 48 and remove board PAPER SENSOR BOARD TAB 1 POZIDRIV SCREW Figure 4 48 Removing Paper Sensor Board and Switches Assembly Top Of Form Paper Advance Switches Assembly 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove printer from computer as previously described 3 Disconnect cable connector from underside of switches assembly Figure 4 48 SWITCHES ASSEMBLY 4 Squeeze in tabs on switche...

Page 147: ...ing step Loosen only far enough to remove top cover 3 Loosen but do not remove two 1 Pozidriv screws that attach top cover to disc drive Figure 4 49 and lift top cover off drive Retain top cover for installation on replacement disc drive 4 Disconnect ground cable from lug Figure 4 49 HIDDEN GROUND CABLE CONNECTOR 1 POZIDRIV SCREW Figure 4 49 Releasing Flexible Disc Drive ...

Page 148: ...IBBON CABLE 2 POZIDRIV SCREW HIDDEN Figure 4 50 Removing Flexible Disc Drive Note If disc drive is being replaced ensure that following three steps are performed The top cover bucket power cable ground cable bezel and all attaching screws are not shipped with replacement disc drive These parts must be removed and retained for installation on the re placement drive Note The screws removed in the fo...

Page 149: ...tach bucket to drive Figure 4 51 and lift drive out of bucket Ground cable is removed in this step Retain bucket ground cable and attaching screws for installation on replacement drive HIDDEN 2 POZIDRIV SCREW GROUND CABLE Figure 4 51 Disassembling Flexible Disc Drive View 1 ...

Page 150: ...ment drive POWER CABLE BEZEL Figure 4 52 Disassembling Flexible Disc Drive View 2 Reassembly Notes Cut and remove jumper wire on replacement disc drive before installing drive Locate jumper wire on board at rear of drive Cut wire near both connections and remove and discard wire When installing disc drive ensure that power cable is positioned so it is not pinched when the front cover is installed ...

Page 151: ...USED FOR REPLACEMENT DRIVE 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove the 9130K Flexible Disc Drive according to the preceding procedure 3 Disconnect the Winchester Fixed Disc Drive ground cable from the chassis lug Figure 4 53 GROUND CABLE Figure 4 53 Releasing Fixed Disc Drive CAUTION WHEN PERFORMING THE FOLLOWING STEP MOVE DRIVE JUST FAR ENOUGH TO DISCONNECT CABLES OTHERWISE YOU COULD...

Page 152: ...placement disc drive These parts must be removed and retained for installation on the replacement drive 5 Remove side mounting brackets and attached ground cable by removing the two 2 Pozid riv screws that attach each bracket to the drive Figures 4 55 and 4 56 Remove bottom plate by removing the four 2 Pozidriv screws that attach plate to drive Remove power cable by disconnecting both connectors F...

Page 153: ...RACKETS GROUND CABLE BOTTOM PLATE 2 POZIDRIV SCREW Figure 4 55 Disassembling Fixed Disc Drive View 1 POWER CABLE CONNECTORS SIDE MOUNTING BRACKETS POWER CABLE BOTTOM PLATE 2 POZIDRIV SCREW Figure 4 56 Disassembling Fixed Disc Drive View 2 ...

Page 154: ...5 67004 if you have not previously used it The discharge tool consists of a meter and a switch operated dischar ger The meter indicates the approximate voltage across the energy storage capacitors in the power supply WARNING WHEN PERFORMING THE NEXT STEP ENSURE THAT NO MET AL OBJECTS ARE IN YOUR HAND OR ON THE POWER SUPPLY THE DISCHARGE TOOL PINS WILL HAVE HIGH VOLTAGE ACROSS THEM 4 Carefully inse...

Page 155: ...Discharging takes a few seconds Meter movement can be observed as switch is held down until capacitors are completely discharged 6 Carefully remove discharge tool by pulling straight out of power supply WARNING IF DISCHARGE TOOL IS NOT AVAILABLE ALLOW 15 MINUTES FOR THE POWER SUPPLY TO DISCHARGE BEFORE CON TINUING PUSH SWITCH DOWN TO DISCHARGE POWER SUPPLY Figure 4 57 Discharging Power Supply Asse...

Page 156: ...re 4 58 8 Disconnect safety ground cable from lug on ac module Figure 4 58 9 Loosen four 2 Pozidriv captive screws that attach power supply to computer Figure 4 58 SAFETY GROUND CABLE POWER SUPPLY CABLE AC MODULE 2 POZIDRIV SCREW Figure 4 58 Releasing Power Supply Assembly ...

Page 157: ...OUND AND METAL CHASSIS RECORD RESULTS ON REPAIR ORDER 1 UNPLUG COMPUTER POWER CORD FROM AC OUTLET 2 Remove rear cover as previously described 3 Remove 2 Pozidriv screw that attaches transparent plastic cover to ac module Figure 4 60 and remove cover 4 Remove three nuts that attach power cord wires to ac module terminals and remove power cord Figure 4 60 WARNING THE REPLACEMENT CORD MUST HAVE THE S...

Page 158: ...4 58 Assembly Access POWER CORD WIRES Figure 4 60 Removing Ac Power Cord 2 POZIDRIV SCREW ...

Page 159: ...POWER CORD FROM AC OUTLET 2 Remove front and rear covers as previously described 3 Disconnect power supply cable and safety ground cable from ac module Figure 4 61 SAFETY GROUND CABLE 2 POZIDRIV SCREW POWER SUPPLY CABLE AC MODULE Figure 4 61 Releasing Ac Module CAUTION DO NOT LIFT AC MODULE UNTIL RIBBON CABLES HAVE BEEN DISCONNECTED FROM 110 BACKPLANE AS DESCRIBED IN THE NEXT TWO STEPS ...

Page 160: ... screws that attach ac module to computer Figure 4 61 and roll ac module onto its side 5 Disconnect ribbon cable connectors from PI and P2 on the 110 backplane Figure 4 62 and remove ac module RIBBON CABLE CONNECTORS Figure 4 62 Removing Ac Module ...

Page 161: ...nd rear covers as previously described 3 Disconnect power cord from ac module as previously described 4 Disconnect ground cable from ac module cover Figure 4 63 Assembly Access 4 61 5 Remove two 2 Pozidriv screws that attach display connector assembly to ac module cover Figure 4 63 and roll connector assembly onto top of power supply 2 POZIDRIV SCREW GROUND CABLE Figure 4 63 Removing Display Conne...

Page 162: ...at attach top cover to ac module Figure 4 64 and remove cover 2 POZIDRIV SCREW Figure 4 64 Removing Ac Module Cover 7 Disconnect two line filter wires from power switch assembly lugs Figure 4 65 Note that blue wire is on top lug and brown wire on bottom lug ...

Page 163: ...y Access 4 63 220V 8 Remove three 2 Pozidriv screws that attach ac module base to chassis Figure 4 61 and roll ac module onto power supply 9 Remove two 2 Pozidriv screws that attach line filter to ac module Figure 4 66 and remove line filter 2 POZIDRIV SCREW Figure 4 66 Removing Line Filter ...

Page 164: ...FROM AC OUTLET 2 Remove front and rear covers as previously described 3 Disconnect ground cable from ac module cover Figure 4 63 4 Remove two 2 Pozidriv screws that attach display connector assembly to ac module cover Figure 4 63 and roll connector assembly onto top of power supply 5 Remove three 2 Pozidriv screws that attach top cover to ac module Figure 4 64 and remove cover 6 If removing power ...

Page 165: ...T 2 Remove processor stack by performing steps 2 through 11 of the Processor Stack Mother board procedure previously provided 3 Remove four 1I8 inch Allen screws that attach fan to stack Figure 4 68 and remove fan 118 INCH ALLEN SCREW HIDDEN Figure 4 68 Removing Processor Stack Fan Reassembly Note Install replacement fan on stack with airflow direction arrow pointing out away from stack and plug r...

Page 166: ...wer cable plug from power supply fan Figure 4 69 Figure 4 69 Disconnecting Power Supply Fan Cable 4 From rear of computer remove four 2 Pozidriv screws that attach power supply fan to computer Figure 4 70 and remove fan 5 Remove four clips at corners of fan and retain for installation on replacement fan 2 POZIDRIV SCREW Figure 4 70 Removing Power Supply Fan ...

Page 167: ... OUTLET 2 Remove front and rear covers as previously described 3 Remove all cards from 110 area and mass storage controller area as previously described under 110 Cards and Mass Storage Controller Cards 4 Disconnect power supply cable and safety ground cable from ac module Figure 4 61 5 Remove three 2 Pozidriv screws that attach ac module to computer Figure 4 61 and rotate ac module onto its side ...

Page 168: ... out of casting while pulling front of guide gently outward Figure 4 71 REAR CARD GUIDE LOCATING PINS LOCATING HOLES Figure 4 71 Removing Rear Card Guide 8 Disconnect power cable plug from 110 card cage fan Figure 4 72 I O FAN PLUG Figure 4 72 Disconnecting 110 Card Cage Fan Cable ...

Page 169: ... Card Cage Fan Reassembly Notes Attach four clips to corners of fan before attempting to install fan in computer Install replacement fan in computer with airflow direction arrow pointing toward rear of computer and plug receptacle at upper right corner of fan as viewed from rear of computer Ensure proper polarity of fan and fan cable Ensure fan cable is not pinched when computer is reassembled Ens...

Page 170: ...n procedure previously provided 3 Disconnect 110 door interlock cable connector from 110 backplane Figure 4 74 4 Remove 2 Pozidriv screw that attaches front card gUide to casting Figure 4 74 and remove front card gUide FRONT CARD GUIDE FRONT CARD GUIDE SCREW 1 0 DOOR INTERLOCK CABLE CONNECTOR Figure 4 74 Removing Front Card Guide ...

Page 171: ...cess 4 71 5 Remove nine 2 Pozidriv screws that attach 110 backplane to power supply bucket Figure 4 75 6 Lift 110 backplane straight up and away from motherboard 2 POZIDRIV SCREW Figure 4 75 Removing 110 Backplane ...

Page 172: ... cable connector s from motherboard connectors J53 and J54 Figure 4 76 6 Remove two 4 millimeter Allen screws that attach two bus bars to H casting Figure 4 76 7 Remove two 2 Pozidriv screws that attach each of the two bus bars to the chassis Figure 4 76 and move bus bars out of the way 8 Remove nine 2 Pozidriv screws and flat washers that attach H casting to base Figure 4 76 and lift H casting wh...

Page 173: ...assis FAN POWER CONNECTOR lOP CONNECTORS Figure 4 77 Removing Motherboard Reassembly Note Connect lIO backplane to motherboard and attach lIO backplane to H casting power supply bucket before tightening screws that attach casting to chassis Otherwise the 110 backplane may not connect to the motherboard or the connection may be stressed ...

Page 174: ...ideo board Video board CRT yoke assembly Fan WARNING THE PROCEDURES IN THIS SECTION ASSUME THAT THE AC POWER CORD HAS BEEN UNPLUGGED FROM THE DISPLAY AND THAT THE DISPLAY HAS BEEN REMOVED FROM THE COM PUTER DISPLAY REMOVAL IS DESCRIBED PREVIOUSLY IN THIS CHAPTER CRT Safety Precautions Observe the following safety precautions whenever you are working with or near the CRT WARNING THE CRT CAN IMPLODE...

Page 175: ...ess its removal is required by CRT replacement or replacement of the bezel or its glass window Top Cover and Rear Cover Remove the top cover to access any assembly in the display Remove the rear cover to access the RFI board graphics digital video board video board CRT yoke assembly or fan The top cover must be removed to remove the rear cover The top cover is attached by four tab locks two on eac...

Page 176: ...E AF TER REMOVING POWER CORD 2 Loosen four 1I4 turn 1 Pozidriv captive screws and remove top lid from display Figure 4 79 W jilo ll fcDOiJS c t rl tlf NEJtHY RENEASW cc I W W il l I F iN wm Is lit ff POSTk H 4U oW U ASf O CA ttCt OH I cSCHAJl C AHfR MOvm F owEfc CCfW Figure 4 79 Removing Top Lid _ TOP LID 2 POZIDRIV SCREW ...

Page 177: ...s from right side of chassis Figure 4 80 4 Loosen three thumbscrews at right side of chassis Figure 4 80 THUMBSCREWS Figure 4 80 Releasing Display Power Supply Board Assembly Access 4 77 DISPLAY POWER SUPPLY BOARD 2 POZIDRIV SCREWS ...

Page 178: ...y straight up until two cable connectors are accessible Figure 4 81 6 Disconnect two cable connectors Figure 4 81 and remove display power supply board from display CABLE CONNECTORS DISPLAY POWER SUPPLY BOARD Figure 4 81 Removing Display Power Supply Board ...

Page 179: ...re 4 79 CAUTION HANDLE SINGLE WIRE CONNECTORS BY CONNECTOR ONLY OTHERWISE WIRE MAY BREAK INSIDE THE CONNECTOR 3 Disconnect two single wire connectors Figure 4 82 WARNING FAILURE TO PERFORM THE NEXT STEP COULD RESULT IN IN JURY 4 Fold back rubber from anode connector Figure 4 82 and short circuit anode to chassis using screwdriver with insulated handle SINGLE WIRE CONNECTORS Figure 4 82 Releasing S...

Page 180: ... and tilting connector away from CRT 6 Loosen thumbscrew that attaches sweep board to chassis Figure 4 82 7 Slowly lift board straight up until two cable connectors are accessible Figure 4 83 8 Disconnect two cable connectors Figure 4 83 and remove sweep board from display CABLE CONNECTORS SWEEP BOARD Figure 4 83 Removing Sweep Board ...

Page 181: ... is oriented as shown in Figure 4 84 before connecting to CRT Fold rubber back as shown and replace anode in CRT Ensure that both anode prongs are fully seated and unfold rubber against CRT Figure 4 84 Anode Orientation Assembly Access 4 81 ...

Page 182: ... Remove display power supply board and sweep board as previously described 4 Disconnect three cable connectors from display motherboard Figure 4 85 5 Release display motherboard from plastic standoffs Figure 4 85 by pushing paper spindle tool 09815 20602 over standoff while lifting up on motherboard 6 Remove display motherboard from display CABLE CONNECTOR STANDOFFS 0380 1624 Figure 4 85 Removing ...

Page 183: ...oard and remove board from cage door Figure 4 86 Figure 4 86 Removing RFI Board Graphics Digital Video Board 1 Remove top cover 2 Remove rear cover 2 POZIDRIV SCREWS CABLE CONNECTOR 3 Loosen two thurnbscrews on cage door and open door Figure 4 87 If necessary carefully pry top of door away from chassis with flat blade screwdriver THUMBSCREWS Figure 4 87 Opening Cage Door CAGE DOOR ...

Page 184: ...NNECTOR GRAPHICS DIGITAL VIDEO BOARD Video Board 2 POZIDRIV SCREW Figure 4 88 Removing Graphics Digital Video Board REASSEMBLY CAUTION WHEN CLOSING THE CAGE DOOR ENSURE THAT THE RFI GASKETING DOES NOT CATCH ON THE DOOR SIDES 1 Remove top cover 2 Remove rear cover WARNING WAIT AT LEAST 5 MINUTES FOR CAPACITOR DISCHARGE AF TER REMOVING POWER CORD 3 Loosen four 1I4 turn 1 Pozidriv captive screws and ...

Page 185: ...video board Figure 4 89 7 Remove four 2 Pozidriv screws from video board Figure 4 89 8 Pull board slightly away from chassis and disconnect two cable connectors from rear of board 9 Push two single wire connectors through holes in chassis 10 Disconnect CRT yoke assembly connector Figure 4 89 from CRT yoke assembly and remove video board VIDEO BOARD GROUND CONNECTOR CRT YOKE ASSEMBLY CONNECTOR 2 PO...

Page 186: ...th your feet Pull up on the cardboard insert surrounding the CRT and remove the insert with the CRT from the box CAUTION WHEN HANDLING THE CRT YOKE ASSEMBLY DO NOT TOUCH THE AREA AROUND THE YOKE HANDLE ONLY BY CRT BOT TLE PART OF THE ASSEMBLY YOKE ADJUSTMENTS ARE MADE AT THE FACTORY AND ARE EXTREMELY DELICATE WARNING WAIT AT LEAST 5 MINUTES FOR CAPACITOR DISCHARGE AF TER REMOVING POWER CORD 1 Remo...

Page 187: ...Remove four 2 Pozidriv screws that attach front of CRT to chassis Figure 4 91 8 Hold CRT yoke assembly by CRT bottle pull slightly forward so yoke clears yoke support grommet and remove assembly from chassis 2 POZIDRIV SCREWS Figure 4 91 Removing CRTNoke Assembly ...

Page 188: ...EA AROUND THE YOKE HANDLE ONLY BY CRT BOT TLE PART OF THE ASSEMBLY YOKE ADJUSTMENTS ARE MADE AT THE FACTORY AND ARE EXTREMELY DELICATE 1 Wrap degaussing cable around replacement CRT yoke assembly exactly as shown in Figures 4 92 and 4 93 CABLE MUST CROSS AS SHOWN BOTTOM OF CRT Figure 4 92 Preparing Degaussing Cable ...

Page 189: ...RTN oke Assembly 2 Loosen the four 2 Pozidriv screws that hold the yoke support plate and grommet so that the plate floats Figure 4 94 3 Lift the CRT yoke assembly by the CRT bottle slide the yoke through the yoke support plate grommet and place in position POZIDRIV SCREWS GROMMET Figure 4 94 Yoke Support Plate ...

Page 190: ...ate to the chassis Figure 4 94 6 Tighten degaussing cable by tying cable together across top of CRT yoke assembly with cable tie wrap 7 Replace front bezel Push CRT bezel gasket down by inserting a bent coat hanger or long flat blade screwdriver between bezel and CRT and tamping down Figure 4 95 8 Replace video board 9 Replace sweep board Ensure anode connector is oriented as shown in Figure 4 84 ...

Page 191: ...3 Disconnect fan cable connector from display motherboard 4 Remove both fan clips Figure 4 96 To release clip press in on top and bottom of clip from outside while pressing down on top tab from inside 5 Remove fan and attached cable FAN CLIPS Figure 4 96 Removing Fan ...

Page 192: ...4 92 Assembly Access ...

Page 193: ...oduct Support Tools 5 3 Extender Board 5 4 Documentation 5 4 Printer Paper 5 5 Parts List 5 6 Covers 5 7 Chassis Components 5 8 Printer 5 11 Processor Stack 5 13 I O Cage 5 15 AC Module 5 16 Winchester Fixed Disc Drive 5 17 Aexible Disc Drive 5 18 Keyboard 5 19 98760 Display 5 20 Keyboard Configurations 5 22 ...

Page 194: ......

Page 195: ...to the following sections Exchange Parts Non Exchange Parts Product Support Tools Extender Board Documentation Printer Paper Parts List Keyboard Configurations Any part number is located by using the parts list and or exploded view drawings All parts listed can be ordered from the Corporate Parts Centers except for exchange assemblies which are ordered from the Computer Support Division 5 1 ...

Page 196: ... 5 6 8 09855 66561 09855 69561 9130K Controller Card 5 9 1 09130 67600 09130 69600 9130K Flexible Disc Drive 5 6 8 09855 66560 09855 69560 Winchester 110 Card 5 6 8 0950 0886 09855 69886 Winchester Disc Controller 5 8 1 09133 67102 09133 69102 Fixed Disc Mechanical Drive 5 8 2 09133 67101 09133 69101 Fixed Disc Electronics Board 5 11 1 09836 66550 09836 69550 98760A Power Supply Board 5 11 2 09836...

Page 197: ... 5 3 4 09855 66551 Printer Logic Board 5 3 7 09845 67163 Printhead 5 3 8 09855 66555 Printhead Interconnect Board 5 4 10 09845 67161 Printhead Chip Module 5 2 28 09855 66500 Motherboard 5 6 1 09855 66501 110 Backplane 5 2 15 3160 0377 Fan 5 11 7 98760 66500 98760A Display Motherboard Product Support Tools Table 5 3 lists the items that comprise the Product Support Tools Standard customer engineeri...

Page 198: ...udes 09020 90037 Service Manual for the HP 9000 Model 520 09020 90012 Installation and Test for the HP 9000 Model 520 09000 90040 Series 500 Site Preparation Manual 98770 90030 Service Manual for the HP 98770A Display 98780 90030 Service Manual for the HP 98780A Display 5955 6587 Sales and Support Offices 9282 0989 2 3 Ring Binder 09020 90007 Manual Assembly Instructions 9211 3778 Package Shipping...

Page 199: ...otal of 1320 sheets per box Call HP s toll free order number 800 538 8787 to order replacement paper Table 5 4 lists the part numbers and descriptions of HP replacement paper Table 5 6 HP Printer Replacement Paper Part Number Description 9270 0640 English dimensioned black print 9270 0641 English dimensioned blue print 9270 0642 Metric dimensioned black print 9270 0643 Metric dimensioned blue prin...

Page 200: ...5 6 Replaceable Parts Parts List The following figures and tables list all the replaceable parts for the computer except keycaps which are listed separately at the end of this chapter Figure 5 1 Covers ...

Page 201: ...60371 1 Rear Cover 2190 0010 6 Washer Lock Ext T 3050 0071 6 Washer Rat MTLC 0905 0960 6 O Ring 4 5041 3455 1 Keyboard Bezel 4040 2047 2 LED Lens 0905 0129 2 O Ring 0 145 Inch 1390 0064 4 Receptacle Ball Stud 5041 3450 1 Filler Key Left 5041 3451 1 Filler Key Right 5 7200 1698 2 Door Trim Labels 5955 8036 1 FCC Computer Compliance Label 7121 3107 1 Special Function Key Label 7121 3493 1 Interlock ...

Page 202: ...pply bucket 12 1600 1216 4 Door Hinge 13 1600 1217 1 Left Strap 14 1600 1218 1 Right Strap 15 3160 0377 3 9 5 VDC Fan 16 0590 1453 8 Fan Clip 17 8120 3551 1 Flexible Disc Drive Power Cable 18 8120 3599 1 Ground Cable 19 1600 1210 1 Alternate Cursor Control Bracket 20 1600 1230 1 No Printer Cover 21 5041 3457 1 Base 22 8120 3553 1 Fan Cable 23 8120 3558 1 Alternate Cursor Cable Assembly 24 8120 355...

Page 203: ...Replaceable Parts 5 9 NOT SHOWN 19 20 22 23 26 27 28 hassis Figure 5 2 C ...

Page 204: ...I HIDDEN 5 3 Printer Figure bi Parts 5 10 Replacea e 5 4 Printhead Figure ...

Page 205: ...500 0530 1 Drive Belt 15 1530 2025 1 Roller 16 1530 2026 1 Platen 17 1600 1201 4 Bezel Clamp 18 1600 1333 1 Right Side Plate 19 1600 1334 1 Left Side Plate 20 3101 2564 1 Switches Assembly 21 3140 0668 1 Stepper Motor and Connector 22 4040 2057 1 Paper Guide Slider 23 5040 8143 1 Roller Pulley 24 5040 8144 1 Motor Pulley 25 5041 1497 1 Lower Paper Guide 26 5041 1498 1 Tear Bar 27 5060 7463 1 Plate...

Page 206: ...5 12 Replaceable Parts Figure 5 5 Processor Stack ...

Page 207: ...oard exchange 5061 7704 1 1M RAM Board new 09855 66525 1 Load Board 3 5061 4224 1 Clock Board 4 5061 4263 1 Stack Motherboard 5041 3463 2 Motherboard Support 5 1600 1353 1 Stack Door 5180 5201 1 Label Door Seal 6 1400 1179 1 lOP Cable Clamp 7 3160 0377 1 Fan 8 1600 1353 1 lOP Connector Plate Aluminum 5041 3468 1 lOP Connector Plate Black 9 3101 2565 1 Processor Interlock Switch 10 8120 3600 1 Proc...

Page 208: ...5 14 bl Parts Replacea e 6 I O Cage Figure 5 ...

Page 209: ...er Card 09020 80000 1 LoaderlID ROM for Fixed Disc Drive or Bootstrap Loader Card 09020 80001 1 LoaderlID ROM for Fixed Disc Drive or Bootstrap Loader Card 09855 69561 1 9130K Flexible Disc Drive Controller 1818 1897 1 Flexible Disc Controller ROM For Interface Card information see the 520 Installation Manual 09020 90011 Appendix A When ordering the LoaderlID ROM the serial number of the computer ...

Page 210: ...110V Ac Module Cable 8120 3580 1 220V Ac Module Cable 4 4040 2054 1 Switch Bezel 5 9135 0163 1 Line Filter 6 4040 2048 1 Ac Wiring Shield 7120 6157 1 Ac Danger Label 7121 3060 1 90 125V Line Voltage Label 7121 3062 1 220V Line Voltage Label 7121 2708 1 High Voltage Label 7 Ac Power Cords 09855 61600 1 United States 110V 09855 61601 1 Australia 09855 61602 1 Europe 09855 61603 1 CSA and United Stat...

Page 211: ...antity Description 1 09133 69102 1 Fixed Disc Mechanical Drive 2 09133 69101 1 Electronics Board 3 1600 1306 2 Mounting Bracket 4 1600 1311 1 Bottom Cover 5 8120 3598 1 Ground Cable 6 8120 3800 1 Drive Power Cable 7 8120 3786 1 20 Pin Drive Cable 8 8120 3802 1 34 Pin Drive Cable For information on controller card or liD card see the liD Cage Parts List ...

Page 212: ...ctronics Board 09131 69600 1 9131G Flexible Disc Drive with board 3 1390 0596 3 Captive Screw 4 1600 1212 1 Bucket Assembly 5 1600 1228 1 Bucket Cover 6 8120 3598 1 Ground Cable 7 4040 2056 1 Appearance Bezel 8 8120 3552 1 Power Cable 9 8120 3555 1 Logic Cable 9020 serial number prefix 2422 uses this disc drive The electronics board cannot be ordered separately For information on the controller ca...

Page 213: ...855 69531 1 Keyboard Electronics Board 2 1420 0302 1 4 8V RTC NVM Battery Assembly 3 09855 69131 1 Keyswitch Board 4 1820 2707 1 Processor ROM 8048 Bottom of board 5 3101 2595 Keyswitch Micro 3101 2596 Keyswitch Cortron 6 1390 0448 4 Snap in Fastener 7 1440 0160 2 Pull Handle 8 1600 1234 1 Structural Strip Front 9 1600 1236 1 Structural Strip Rear 10 1390 0448 4 Ball Stud ...

Page 214: ...1 Yoke Support Plate 0400 0025 1 Grommet 3050 0066 2 Flat Washer 2190 0918 4 Lockwasher 17 8120 4099 1 IntenSity Pot 0510 0595 2 Retaining Clip 5040 8149 1 Thumbwheel 18 98760 67901 1 Fan includes cable and grill 19 4040 1926 2 Fan Clip side bracket 20 4040 1923 1 Fan Boot 21 98760 40101 1 Base Assembly With Latch Assembly 22 Latch Assembly 1460 1982 4 Latch Spring 0624 0403 8 Latch Screw 1480 008...

Page 215: ...Replaceable Parts 5 21 Figure 5 11 98760 Display ...

Page 216: ...ing keycap configurations ASCII French Spanish German Katakana and Swedish Finnish The last four digits of the keycap part number are provided for each keycap The first four digits are always 0371 For example the J keycap is identified on Figure 5 12 as 2632 To order the J keycap order part number 0371 2632 All keycap configurations except ASCII have some keycaps highlighted The shaded keycaps dif...

Page 217: ...board Prefix 0371 2619 2104 2683 268i 2685 2886 2 70 2670 2610 2670 2681 2689 2690 2691 2692 2593 2594 2695 2696 268 2691 2698 2699 2100 2650 2101 2102 2103 I I I 26 t I w 1 49 2647 I iiii 1 1 5 2612 2632 2634 2643 3290 I 2708 1 11 i Illi 2566 3133 3132 3131 Figure 5 13 French Keyboard Prefixe 0371 1 2670 2610 2610 2687 2688 2685 2700 2 50 2102 2641 I I 2708 iiii 2654 2655 2666 31 28 2658 2659 266...

Page 218: ...6 2887 2888 2889 2890 2891 2892 2611 2893 2647 I I I 625 2907 2908 2909 2910 2911 2912 2913 2914 2915 2916 2917 2707 2648 I 2684 2677 2683 2682 2611 2SI3O 2675 2681 2708 Figure 5 16 Katakana Keyboard Prefix 0371 2679 2104 2685 2686 I 2687 26M 2690 2691 2692 2670 2688 2 97 2696 26 2700 I II 112 2 2957 2956 2608 2106 Figure 5 17 Swedish Finnish Keyboard Prefix 0371 3124 3126 3125 3127 2654 2655 2656...

Page 219: ...t 2 second repeat rate Clock and date not set Self test error 1 10 address M SS STATUS XXXXXXXX Self test error 2 CHECKSUM for segment NN Self test error 3 XXXX NN Self test error 4 Memory reduced to NNNNNNNN bytes MCs me list Self test error 5 Fewer finstrates were found than expected System halted due to double bit memory error on MC NN CCCCCCCC System halted Incompatible lOPs System halted Insu...

Page 220: ...essage Clock and date not set Indicates Contents of real time clock and non volatile memory have been lost Action Set time date with BASIC statement SET TIME TIMEOATE Example SET TIMEOATE OATE l JAN 1982 TIME lS 20 00 Self Test Error 1 Message Self test error 1 10 address M SS STATUS XXXXXXXX Where M device address o display alphanumeric 1 display graphics 6 keyboard and printer 7 internal mass st...

Page 221: ...iled space substitution test 0 OOOOOOOE Failed display interrupt test 0 OOOOOOOF Failed synchronous startup test 0 00000010 Failed window test 0 00000011 Failed reset test 0 00000012 Timed out while waiting for interrupt 0 00000013 Status false during frame buffer transfer 0 00000014 Timed out while waiting for DMA transfer 1 00000001 Status line not asserted 1 00000002 Flag line asserted when gra...

Page 222: ...OPP HDFL VHLO PTTH HDTH where PSFL Power supply failure motor drive board bad DSTF Dangerous self test failure potential damage to printhead MSTF Minor self test failure no potential damage to equipment OOPP Out of paper HDFL Printhead control line failure BURN and or CLEAR line stuck high or low VHLO Printhead supply voltage too low PTTH Power transistor on motor drive board too hot HDTH Printhea...

Page 223: ...ponse stuck 7 X 00000009 Bad power on qstat X 0 for fixed disc drive 1 for flexible disc drive Error DA SA Code Definition Reserved 7 y 00000001 Can t clear FR1 bits 7 y 00000002 Can t set FR1 bits 7 y 00000003 Reset doesn t clear FR1 7 Y 00000004 Get flop not cleared 7 y 00000005 Failed loopback 7 y 00000006 Get flop not set 7 y 00000007 Status not set 7 y 00000008 Flag not cleared 7 y 00000009 P...

Page 224: ... that the failed board is not required Self Test Error 4 Message Self test error 4 Memory reduced to NNNNNNNN bytes MCs mc list Where NNNNNNNN number of bytes of RAM available to the system mc list is a list of memory controller numbers which had failures Up to 10 MC numbers are printed in 10 two character fields with no intervening spaces For example MCs 1 210 indicates that memory controllers 1 ...

Page 225: ...t memory error on MC NN CCCCCCCC Where NN MC counting from bottom of stack CCCCCCCC last healer content in hex for MC NN System halted due to double bit memory error on MC No DBE found Where No DBE found probably means the MC chip is faulty Could also be CPU lOP or clock board in order of probable cause Indicates Double bit error occurred System halted Action Replace defective RAM card Incompatibl...

Page 226: ...memory to start system Indicates Too much system for available memory Action Add RAM or reduce system Message System halted System error Indicates System fault Action System Error Try new revision of operating system Analyze system dump which has been displayed and or printed ...

Page 227: ...able 0 2 alphanumerically lists all the signal names used on the mother board and provides their definitions Table 0 1 Motherboard Connectors Designator Connecting Assembly J40 lIO Backplane J42 Power Supply J43 Power Supply J44 Power Supply J45 Power Supply J46 Power Supply J47 Power Supply J48 Processor Stack J49 Processor Stack J50 lOP 1 Printer Keyboard J40 J51 Printer Keyboard J52 Three Fans ...

Page 228: ... 24 16 5G 13 13 5G TEST83A 23 23 NOT USED B A 5G 14 14 5G NSTLED 22 22 NPSTLED CS 2 1 1 PST 5G 15 15 5G SIGGND 21 21 NDOORLED 2 2 2 2 5G 16 16 5G NDO 20 20 FANCTL SECGND 3 3 SECGND 5G 17 17 5G NSELFTEST 19 19 SIGGND CS 2G 4 4 CS 12 5G 18 18 SIGGND 18 18 NPI 12 5 5 12 5 19 19 NSYSPU 17 17 SIGGND SECGND 6 6 SECGND 5 20 20 SIGGND 16 16 N 2UNDER SECGND 7 7 SECGND 5 21 21 NPV 15 15 SIGGND 19 8 8 19 5 2...

Page 229: ...STACKTEMP 8 6 2 9 6 2 10 12 11 GND 12 NFDO 13 J52 TO FANS FANP FANGND 2 FANI 3 FANGND 4 key 5 FANF 6 FANGND 7 14 ST11 15 ST9 16 ST7 17 ST5 18 ST3 19 ST1 20 NPI 21 6 2 22 6 2 23 12 24 GND 25 GND J53 TO DISC DRIVES 5 1 5 2 key 3 DGND 4 DGND 5 12MM 6 12MM 7 12 8 J49 TO STACK CONNECTOR NPV 1 GND 2 GND GND 4 GND 5 GND 6 2 7 5 8 10 11 3 85 12 3 85 13 14 GND 15 GND 16 GND 17 GND 18 GND 19 GND 20 2 21 22 ...

Page 230: ...NGND Fan ground return FANI Power to 110 card cage fan negative voltage FANP Power to power supply fan negative voltage GND Ground plane of motherboard GUARDGND Shields power supply supervisor board from primary and secondary boards LOLINE Low line indication MS 12 Monitor sense for 12 volt under over voltage MS 19 Monitor sense for 19 volt under over voltage MS 2 Monitor sense for 2 volt under ov...

Page 231: ...data bit 14 negative true NIOD15 I O bus input output data bit 15 negative true NIOSB I O bus data transfer strobe negative true NMI Non maskable interrupt NPAO I O bus peripheral address bit 0 negative true NPAI I O bus peripheral address bit 1 negative true NPA2 I O bus peripheral address bit 2 negative true NPFW Power fail warning negative true NPI Not pop in negative true Resets the stack NPKP...

Page 232: ...ck self test from slot 3 ST4 Processor stack self test from slot 4 ST5 Processor stack self test from slot 5 ST6 Processor stack self test from slot 6 ST7 Processor stack self test from slot 7 ST8 Processor stack self test from slot 8 ST9 Processor stack self test from slot 9 ST10 Processor stack self test from slot 10 ST11 Processor stack self test from slot 11 ST12 Processor stack self test from...

Page 233: ...r and its usage Table E 2 lists all the signal names used on the 110 backplane and their definitions Table E l I O Backplane Connectors Designator Connecting Assembly PI Display Interface Module Power P2 Display Interface Module lOP P3 110 Card P4 110 Card P5 110 Card P6 110 Card P7 Reserved P8 Reserved P9 Reserved PIO Mass Storage Controller Card PII Mass Storage Controller Card JI2 Motherboard P...

Page 234: ...FW 32 32 NNMI DGND 32 31 DGND GND 32 31 NIOD2 NOT USED 31 31 NOT USED DGND 30 29 DGND NIOD3 30 29 GND NSW2 30 30 NOT USED DGND 28 27 DGND NIOD4 28 27 NIOD5 NSWO 29 29 NSWO 12 26 25 12 GND 26 25 NIOD6 NDPA 28 28 NSTS 12 24 23 12 NIOD7 24 23 GND GND 27 27 GND 12 22 21 5 NIOD8 22 21 NIOD9 NMYPA 26 26 NIFC 20 19 GND 20 19 NIOD10 NDBYT 25 25 NDEND 5 18 17 5 NIOD11 18 17 GND NBR 24 24 NARQ 5 16 15 5 NIO...

Page 235: ...POLL 19 NIC3 18 NIC4 17 NUAD 16 GND 15 NPA1 14 NPA3 13 GND 12 NIOD1 11 NIOD3 10 GND 9 NIOD5 NIOD7 7 GND 6 NIOD9 NIOD11 4 GND 3 NIOD13 2 NIOD15 SGND P8 RESERVED A GND 30 DSIN 29 ORIN 28 GND 27 DATA6 26 DATA4 25 DATA2 24 DATAO 23 GND 22 CSB6 21 CSB4 20 CSB2 19 CSBO 18 GND 17 NOT USED 16 CSA4 15 CSA2 14 CSAO 13 GND 12 CSRS 11 INTO 10 NOT USED 9 GND RESET 7 GND 6 12 12 12 5 B 30 GND 29 DSOUT 28 DROUT ...

Page 236: ... 14 13 13 12 12 11 11 10 10 9 9 8 7 7 6 6 4 4 3 3 2 P13 RESERVED 50 49 48 47 46 45 44 43 12 AC t AC GND NOT USED NNMI NOT USED NOT USED GND NSTS NDEND NWAIT GND NIOSB GND NPOLL NIC3 NIC4 NPA1 PA3 GND NIOD1 NIOD3 GND NIOD5 NIOD7 GND NIOD9 NIOD11 GND NIOD13 NIOD15 DSOUT GND ORIN DATA7 DATA6 42 41 DATA5 DATA4 40 39 GND DATA3 38 37 DATA2 DATA1 36 35 DATAO GND 34 33 CSB7 CSB6 32 31 CSB5 CSB4 30 29 GND ...

Page 237: ...d CSB3 Reserved CSB4 Reserved CSB5 Reserved CSB6 Reserved CSB7 Reserved CSRS Reserved CSWS Reserved DATAO Reserved DATAl Reserved DATA2 Reserved DATA3 Reserved DATA4 Reserved DATA5 Reserved DATA6 Reserved DATA7 Reserved DGND Dirty ground return ORIN Reserved DROUT Reserved DSIN Reserved DSOUT Reserved GND Ground plane of 110 backplane INTO Reserved INTI Reserved NARQ HP IO card requests attention ...

Page 238: ...NlODll lIO bus input output data bit 11 negative true NlOD12 lIO bus input output data bit 12 negative true NlOD13 lIO bus input output data bit 13 negative true NlOD14 lIO bus input output data bit 14 negative true NlOD15 lIO bus input output data bit 15 negative true NlOSB lIO bus data transfer strobe negative true NMYPA HP lO card recognized its address has been asserted negative true NNMl Non ...

Page 239: ...ude page numbers with your comments wherever possible If there is a revision number found on the Printing History page include it on the comment sheet Also include a return address so that we can respond as soon as possible The sheets are designed to be folded into thirds along the dotted lines and taped closed Do not use staples Thank you for your time and interest ...

Page 240: ...odel 520 Computer 09020 90037 February 1985 Update No _______ See the Printing History in the front of the manual Name Company _____________________________________________________________________ Address PhoneNo _____________________ fold fold fold fold ...

Page 241: ...37 LOVELAND COLORADO POSTAGE WILL BE PAID BY ADDRESSEE Hewlett Packard Company Fort Collins Systems Division Attn Customer Documentation Dept 3404 East Harmony Road Fort Collins Colorado 80525 NO POSTAGE NECESSARY IF MAILED IN THE UNITED STATES ...

Page 242: ...Part No 09020 90037 E 0285 Microfiche No 09020 99037 FIJO I HEWLETT PACKARD Printed in U S A Edition 1 with update February 1985 ...

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