Wang 5536 Maintenance Manual Download Page 1

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Summary of Contents for 5536

Page 1: ...WANG 5536 WORKSTATION Models 5536 1 TC 5536 2 5536 2 TC 5536 3 5536 3 TC 5536 4 5536 4 Customer Engineering Product Maintenance Manual 3402 741 0522...

Page 2: ...the end of this manual for feedback Evaluations of manual content with suggested additions deletions as well as any corrections are welcome Second Edition March 1984 user and This edition of the 5536...

Page 3: ...ed current are present within the power supply Do not attempt to repair the switching power supply it is field replaceable only After powering the unit down and disconnecting the AC power plug from th...

Page 4: ...R 2 THEORY OF OPERATION Functio nal Overview Basic Workstation Functions Z80A CPU Diagnostic Memory Parity Generation and Test In Out Decoder Keyboard Interface Logic Video Display Logic Data Link Fun...

Page 5: ...ion Switch Settings Ins tal lation Accessory Items CHAPTER 5 PREVENTIVE AND CORRECTIVE MAINTENANCE Preventive Maintenance General Workstation Checkout Corrective Maintenance General Maintenance Remova...

Page 6: ...orkstation Rear Panel 210 7545 Switch Settings 210 7744 Switch Settings TelecolillllUnications 210 7541 Switch Settings 210 7744 Voltage Test Points 210 7656 Adjustment and Test Points 210 7456 CRT Di...

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Page 8: ...UJ Kit tf 503 64K 5536 1 to 2256C UJ Kit tf 3020 5536 2 to 2256C UJ Kit tf 3021 5536 3 to 2256C UJ Kit tf 3022 5536 4 to 2256C UJ Kit tf 3023 The kit contains a VS PROM remove OIS PROM on the 7545 PCA...

Page 9: ...nce o Perform troubleshooting and fault diagnosis to the circuit board level o Perform removal replacement procedures of major sub assemblies 1 3 RELATED DOCUMENTATION 1 3 1 DIAGNOSTICS The diagnostic...

Page 10: ...shed through DMA logic software Each workstation contains a p wer supply and provision for up to three printed circuit assemblies PCAs on a standard motherboard 210 7542 This manual contains valid inf...

Page 11: ...3402 WIRING SIDE CRT VIDEO CONNECTOR Figure 1 4 PCA Locations 1 4 CRTtCPU PCA SPARE SLOT...

Page 12: ...in 0 41 cm 0 09 in O 23 cm 128 characters including uppercase and lowercase letters each character is assigned one or more attributes for high or low intensity display re verse video blinking or unde...

Page 13: ...ION OPTIONS The 5536 workstation is available in four models all with the exception of the 16K model are capable of supporting the TC option 5536 1 5536 2 5536 3 5536 4 16K Memory 32K Memory 48K Memor...

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Page 15: ...a Link These functions are interconnected by the System Address Bus and the System Data Bus If the workstation contains the TC option a third PCA 210 7541 will be located in slot number 3 of the mothe...

Page 16: ...ut of an I 0 device rather than memory The IN OUT decoder identifies the selected I O device 2 2 5 KEYBOARD INTERFACE LOGIC During an appropriate IN instruction the Keyboard Interface places a charact...

Page 17: ...158 to accommodate the extended columns used by wide platen printers and line printers These additional 1872 character spaces total 3792 are also accommodated in CRT memory however only 80 columns ca...

Page 18: ...the matrix associated with each character position Specific characters are displayed in an 8x8 portion of the matrix cursor and underlines are displayed in the lower 10x2 portion of the matrix Most ch...

Page 19: ...ol memory that determines the display status of each character normal intensified underlined etc 16MHz OB DC MCK CK ZBOA CPU WAIT 1NT BtfSRO I CRT SCAN LOGIC He H5 Ve Vs ROWS COLUMN DOI TIMf CRT CPU I...

Page 20: ...emory bu ffer and to read main memory Mapping the CRT memory bu ffer into the top 16K of the Z80A memory addressing range speeds the frequent CRT display updates required for word processing This uppe...

Page 21: ...and character keystroke inhibits as soon as the CPU reads the character Repeat keystroke processing requires these additional interface functions o Initiate a quarter second delay to recognize a reque...

Page 22: ...Ve Vs ROWS COLUMN 001 TIME CRTMCMURV FFFF CRT CHARACTER EOOO CAT TUBE PA Ally rnRoA POWfRUP ADDRESS BUS ____ iiis MEMORY t _ SEQUENCE OMA REQUEST I _ ___ 1l 1 00 0 1 I DAU eus euslia J PARITY GENERAT...

Page 23: ...ary Memory Refresh cycles The CPU can es cape from the dis ab 1ing NOPs only through a Z80A RESET Reset can be accomplished by o Executing Data ink RESTART command o Accessing Diagnostic PROM o Cyclin...

Page 24: ...output data while 0 performing a memory access or I O instruction RFSH Refresh an address for that address During an Ml memory period 1 cycle the CPU outputs memory refresh RFSH confirms the active p...

Page 25: ...mode the CPU is res tarted to address 0000 HEX If the Telecommunication option is not present the only interrupt is due to keystrokes If the Telecommunications option is present an interrupt may also...

Page 26: ...M MEMORY 0 0000 0 0000 D OO D 01 Figure 2 7 Memory Organization o Main Memory Four Main Memory RAM loadings are available 16K 32K 48K and 64K Main RAM can be accessed by both the CPU and the Data Link...

Page 27: ...e already being displayed Although CRT memory contains fewer than 4K display characters it requires 16K of address space The additional addressing is needed for attribute memory and to support the row...

Page 28: ...t 4M baud The actual data transfer rate is approximately 260K bytes per second o Data Link Commands Six Data Link commands permit the Jitaster to Check Slave STATUS and ID Initiate Slave Operatio REST...

Page 29: ...erial parallel shift register has been loaded line parity is tested the first byte of information is loaded into a command register and a DMA bus request is initiated Since stray line noise may start...

Page 30: ...ing line reversal and maintains continuous timing while transmitting Line control ensures that the Data Link is ready to receive command inputs from the Master when the Data Link is not in use determi...

Page 31: ...elected devices to place OMA addresses and data onto th system bus OMA Enables also ensure that only the selected device is allowed to control the main memory write control lines 2 3 2 4 Diagnostic PR...

Page 32: ...NE OR PUBLIC DIAL NETWORK REMOTE SYSTEM OR TERMINAL Figure 2 10 TC Connection Diagram 2 4 2 FUNCTIONAL OVERVIEW TC logic resides on one circuit assembly PCA 210 7541 The major logic functions are o US...

Page 33: ...T 12 KB l lESET DURING T C OUT 13 1 OMS TIMER RESET DURING T C OUT 14 T C CONTROL ASYNC BISYNC SCA OUT llBD WR WR INP IORO OUTS KP O BTR RD f08o 8o FROM BOBO SW1 PORT l D DEVICE TYPE MODERN TYPE T C I...

Page 34: ...er 8080 configuration The data D0 07 is then gated into the USART where it is converted into serial stream format gated to the transmit driver and sent to the 25 pin RS 232 C connector interface Durin...

Page 35: ...ition which it causes If a transmission character than 8 bits is being used the character to be transmitted adjusted in the byte input into the accunrulator Read USART Status Instruction IN X 35 0 0 T...

Page 36: ...S and the Select Asynchronous Clock bit SAC are set at the power up The source of transmission timing for the USART is selected by SAC 0 as the modem signals Transmit Signal Element Timing and Receive...

Page 37: ...Data Instruction OUT X 35 The interpretation of the byte of data output by the SET USART Mode Conunand instruction is determined by the state of the USART Following a reset of the USART which can be c...

Page 38: ...Data Signal Break lasts until BRK is cleared Receive Enable Data Terminal Read Modem Signal Transmit Enable The USART chip has several limitations which must be observed o The status of the USART wil...

Page 39: ...odem Secondary Received Line Signal Detector 13 SCB modem Secondary Clear to Send 14 SBA w s Secondary Transmit Data 15 DB modem Transmit Signal Element Timing 16 SBB modem Secondary Receive Data 17 D...

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Page 41: ...e cabinet Th function and location of each control is defined below Front of workstation on front panel figure 3 1 BRIGHTNESS left Brightness can also be adjusted with INTENSITY GAIN on top of PCA 210...

Page 42: ...rs such as 41 and the arithmetic operators I Additional keys TAB GL RETURN and SHIFT keys perform the following functions o TAB sets the format line zone and advances the cursor through successive zon...

Page 43: ...DDDDDDD ooo ODD L JDODDDDDDDDDOn DDDDD 1 IDDDDDDDDDDDCJ D DOD 3402 ZONE4 OPTIONAL KEYBOARD I IDDDDDDDD DDD ODD DOD ODD__ ZONE 1 TYPEWRITER KEYBOARD NOTE ZONE 2 CURSOR CONTROL AND EDITING KEYS EXPANDED...

Page 44: ...e repeated character is transmitted Thus both aural and visual evidence of the repeated character are given to the user The repeating key is particularly useful for moving the cursor when editing Spec...

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Page 46: ...placement equipment if necessary Be certain to include this information WORK ORDER ff CUSTOMER NAME CUSTOMER MODEL SERIAL 4 2 UNPACKING 5536 workstations are packaged in a single cardboard packaging m...

Page 47: ...on describes workstation installation procedures 4 l INITIAL POWER UP o Locate the POWER switch on the rear panel of the CRT unit and ensure that the switch is in the OFF position o Check the serial t...

Page 48: ...BNC TNC connectors on the rear panel of the workstation CRT unit and the BNC TNC connectors on the rear panel of the system master unit 25 FEET MIN 2000 FEET MAX RIBBON CABLE CLAMPS 1 0 PORTS DISTANC...

Page 49: ...545 2 has two DIP type switches labeled SWl and SW2 SWl is the scan select switch described in section 4 4 1 SW2 is the device type switch Set the switches for the appropriate application as shown in...

Page 50: ...ver it issues an IN 07 command The switch settings determine the type of system WP or OIS that the workstation is attached to Set the switches for the appropriate application as shown in figure 4 5 o...

Page 51: ...rom 2 thru 22 decimal where switch 1 is the least significant bit and switch 5 is the most significant bit Figure 4 6 shows the switch settings for the first TC workstation on a line with a diagram sh...

Page 52: ...ors on each end for connection of the workstation to a modern Direct Connection Jumper Nul 1 Modern To connect the workstation with another cornpu ter or terminal device in physical proximity to the w...

Page 53: ...5 I...

Page 54: ...wer to the workstation and proceed as follows o Check the workstation power supply voltages as described in section S 2 1 1 and adjust as required o Check the CRT display voltages as described in sect...

Page 55: ...12 V figure 5 1 and on PCA 210 7656 or the cinch connector for 12 V figure 5 2 Adjust the trimpots on regulator PCA 210 7656 figure 5 2 if necessary Use pin R for OV reference The power supply voltage...

Page 56: ...ard figure 5 3 and Ll 1 as OV ground references CAUTION Use a non metallic standard tuning wand when adjusting dynamic focus coil Zl o Using pin Mas a test point figure 5 3 adjust the Dynamic Focus Co...

Page 57: ...scale o Adjust the vertical linearity Rl8 for character rows of equal height o Repeat 2 and 3 until both requirements are met o Adjust the width coil Z2 for 8 0 25 11 20 3cm 0 64cm of horizontal defle...

Page 58: ...e can hold a charge of several thousand vol ts To ei iminate the risk of accidental CRT discharge which can result in serious injury discharge the CRT anode as follows o Attach one end of a length of...

Page 59: ...strain the brightness contrast or fan wires o Remove the brightness contrast wires from the clamp on the side of the cover and disconnect the brightness contrast cable from the connector on the top of...

Page 60: ...eyboard to t 1e base of the workstation o Lift and pull the keyboard forward until easy access to the ribbon cable and ground wire is achieved o Remove the screw that secures the keyboard ground wire...

Page 61: ...3402 Figure 5 5b Keyboard Removal Replacement 5 8...

Page 62: ...Supply o Scribe the positions of the CRT on the sides of the chassis and remove remove the 3 1 4 hex head screws and lock washers securing the CRT chassis to the chassis base plate o Lift the CRT chas...

Page 63: ...he monitor electrics board o Disconnect the AC molex connector between the power line filter assembly and the power supply or the three wires brown green blue at the base of the power supply o Remove...

Page 64: ...e wrap o Disconnect ground to chassis o Remove the power supply assembly Replacement 0 To replace the power supply assembly reverse the above procedure 0 I i P 1 1 tr Figure S 7b Power Supply Removal...

Page 65: ...de o Disconnect the ground clip in front of the base plate o Remove the 4 phillips screws that secure the motherboard rear panel assembly to the chassis base plate o Remove the stiffener from the moth...

Page 66: ...Figure 5 Bb Motherboard Rear Panel Assembly Removal Replacement 5 13 3402...

Page 67: ...l o Remove the workstation keyboard o C ip any tie wrap holding the board to chassis o Grasp the CRT PCA and remove it from the CRT Chassis Replacement To replace the CRT PCA reverse the above procedu...

Page 68: ...10 Removal o Remove the phillips head screw that secures the regulator PCA to the power supply o Remove the regulator PCA Replacement o To replace the regulator PCA reverse the above procedure Figure...

Page 69: ...N 726 9608 Grip the switch extractor and pull straight up removing the switch from the keyboard Replacement o Insert the new keyswitch Take care to orient the switch properly and observe the solder t...

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Page 71: ...THE SCHtMATICS WHEN AVAILABLE ARE ON THt LAST fICHE IN THIS SET...

Page 72: ...I...

Page 73: ...or workstation subassembl ies The parts breakdown for PCBs is located in Chapter 6 Schematics Each schematic contains its own component layout and part number listing information SUBASSSEMBLY PAGE NO...

Page 74: ...654 1185 452 1092 452 1081 279 1026 279 1038 650 4105 DESCRIPTION CVR MACHING CLOSED VENT COVER FCC COVER 2200E F SLOT SKLTN 115V 50 60 HZ 50CFM FAN GUARD 4 WHITE 12 CRT BEZEL PLATE LOGO WKSTN KNOB AL...

Page 75: ...I 16 FIGURE 7 1 EXTERNAL COVERS ASSEMBLY ASSEMBLV PART NO 279 4128 7 3 3402 13...

Page 76: ...271 1242 KEYBOARD 928 MICRO LUG 13 271 1243 KEYBOARD STD KEYPAD 13 271 1244 EXPANDED INTERNATIONAL 13 271 1245 EXPANDED W KEYPAD INTERNATIONAL 13 271 1246 KEYBOARD R S MICRO 13 271 1247 KEYBOARD C MI...

Page 77: ...29 D o 28 27 10 v FIGURE 7 2 12 MONITOR ASSEMBLY ASSEMBLY PART NO 270 0372 7 5...

Page 78: ...YLON 15 653 2000 WASHER 4 FLAT 16 650 2200 4 40x3 8 PH PHIL 17 650 2241 4 40x3 4 Fl HD PHL MS BK OX 18 449 0309 STOP PC BO 4 POS BLK 19 461 1545 SUPPORT BLOCK SMALL 20 652 4005 4 40 LOCKNUT KEPS 21 45...

Page 79: ...38 23 28 0 40 41 i 22 11 D c 3402 MOTHERBOARD W S FIGURE 7 3 CHASSIS ASSEMBLY 7 7...

Page 80: ...8 32 LOCKNUT KEPS 14 652 0029 8 32 LOCKNUT KEPS 15 PART OF 16 16 270 3236 TRANSFORMER HARNESS 17 PART OF 16 18 462 0450 SPACER DELRIN 19 420 1005 POWER CORD ROTRON FAN 20 325 2117 SWITCH 115 220 21 6...

Page 81: ...3402 11 _e C9 33 t 22 o 21 J 1e e 0 17 l 1 6 l 15 0 e 14 FIGURE 7 4 POWER SUPPLY ASSEMBLY ASSEMBLY PART NO 279 0526 or 270 0879 FCC 7 9...

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Page 83: ...nk o Continuous READ screen blank o No startup screen blank o LINE ERROR message on startup o PARITY message on startup screen slowly blanks o All 911 s displayed on screen PROM trying to load Correct...

Page 84: ...LATOR PCA 5 2 2 71 REPLACE P S 5 2 2 4 ADJUST BRIGHTNESS AND CONTRAST ADJUST CRT VOLT 5 2 1 21 REPLACE CRT PCA 5 2 2 6 START A PERFORM THE CRT ALIGNMENT PORCEOURE SECTION 5 2 1 3 REPLACE CRT CHASSIS S...

Page 85: ...f the Tele communications workstations described in this manual SfART REFER TO WORKSTATION YES TROUBLESHOOTING FIGUREB 1 1 2 CHECK SWITCH SETTINGS W S T C W S SWITCH YES SETTINGS SECTION 4 4 3 T C SWI...

Page 86: ...URRENT REV LEVELS REMOVE TCPCA FROM MB CHECK VOLTAGF AT CONNECTOR 12 C2 5 15 12 C1 2 22 5 C2 8 2 WORKSTATION PROBLEM CHECKPCA REVISION LEVELS YES CHECK DC POWER 12 L3B PIN8 12 L38 PIN5 5 TP6 YES Figur...

Page 87: ...TH LOOPBACK CONNECTOR INSTALLED DIAGS WP OIS RUN WORKSTATION AND T C ON LINE STOP WORKSTATION N0 2 PROBLEM CHECK EXTERNAL CONDITIONS MODEM LINES HOST ETC Figure 8 4 TC Troubleshooting Flowchart Sheet...

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Page 89: ...t DAL Decimal Tab DEL Delete EX Execute fmt format L C FMT Format U C GL Glossary GO Go To Page IND Indent INS Insert mg Switch Document L C MG Don t Switch Document U C MOV Move NOT Note NXS Next Scr...

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Page 91: ...Reset caused by power turn ON Blank CRT screen Bad Parity Flip Flop Busy signal Busy Acknowledge Bus Request Column Character Count Refresh Logic Clock Chip Select Drive Memory Bank 0 Chip enable for...

Page 92: ...yboard strobe Keyboard shift lock key CPU fetch cycle Master Clock Memory parity error detected Master reset CPU memory request Memory Wait cycle Delayed access No operation start up signal Status bit...

Page 93: ...WAIT WCHAR WCNT WR WRE WTR CPU wait request Write to character CRT memory Write to control CRT memory CPU write System write early signal 3402 Power supply signal to trap CPU to address 0000 B 3...

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Page 95: ...5VR RETURN J2 PINl JI PIN I Jl PIN 4 JI PIN 3 I LI r 1 z v RETURN I OZ A R ll 5EN5E I h3W li JZ PIN I l lV _IZ V DRIVE t I i i I i i I i E I L J I I L HEAT51NK 3 J4 IS VAC T Z 18Vk Tl I 0 t5V SEN5E w...

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Page 97: ...e of printing The following is a list of the schematics contained in this chapter the titles drawing numbers and revisions at time of printing TITLE DWG NO REV COMMENTS Workstation Electronics PCA 210...

Page 98: ...Rll V YOKf l 2W If irlrr z or I _ __ __ __ _ __ I I I _l J_ TBA 7 0 14 3 ID 2 I e11 cw ISV II 0 01 t CU KaAC tJ A E tov _ HlllP F tOV 7 I R1 3J A l t r I I 5 5 rc to tr1111 I I L2 L3 NOTES 4 3 111 cNr...

Page 99: ...i l 1Gt5 MREQ r t r 1 f i _ 1 REq z v 113 J DKS tDK RD I i IO l I Cl 11 10 9 8 7 5 3 2 WANG llATlllAL llNISll ___ ___ Hl II AS 10111 HS flAt t Ill Z All Z I flllll Al Sit 3 1m1 101 4 P 1 19 500 loo I...

Page 100: ...3 4 7 Rllo a n DIS _ _ ZAZ4 cYZ __ _______ o D I S n 11 11 0 6 _ s 3 118 2 7 l j ll3 l f3i o _____ El ZA1 l Y4 1 J R 1 s_____ u1_ _ __ _ rr u a n nf tov II 0 Lll9 10 l oosU 01 Q1 i_ ___ 2 PA E I ll5...

Page 101: ...LI II PC ti 4C s m c 4PI STATU 5CLR 1 B 1 No l ATA llOlo MK i1if 1e 1ei 10 9 8 ll5P 366 IG 7 13 _____ RSI 2 2K H1VR WR l iFI Tl F1 5 0 I LBO 2 12 3 I 15 A 14 B 13 c 5 8 9 11 0 ll i CK C LR 3 2 1 1 1 4...

Page 102: ...ll ZP 9 8 Zlo OV z ti t ZO fl IQ l 1 r L i i LS 11 iif i17 r II tK 3 l X iQi C II 2 IP 10 20 l 4 1 RD H 1 2 2I F 4 _ l t 5VR ITT 1C8 ifil ll J 3 IPR S ltK IQ LICO z 1 11 1 ID jQ lo ENl IT IN It IBT I...

Page 103: ...I p 11111 4 I I ll 1 I c l__J LI 1 131 1 I I I I I I L B 11 10 9 8 7 fi 8 7 5 5 3 FINISH 3 G F E 0 B IODfL llO ARC IVER mu _ __ _ _ 11111 1 i A DAIA LI NI MEMORv SH IHll l ClflCAttDlll tol II AS IHll...

Page 104: ...S 3 T 1 0 S4 S 3 1 1 o 4 S 7 744 2 6 7 744 z s1a o 03 7 74 4 SA 1 1 q q s S l 1 0SO S 3 1 1 0S4 S 1 1 094 S 3 1 1 03 S 114 4 S 4 4 3 1 1 0S4S 3 1S 4S99 1 144 Se 1 144 I S l l oao s lil 1 1 0 SO S 3 1...

Page 105: ...I 1 4W S o l 0 1092 48 1 1 1 141S1 llo 0062 1 8 1 741 02 10 17 t 0242 RC lo1 1o1 l Jl 1 4W SVo 1 2034 111 1 85 91o02 171o OI04 81 91 74114 11C 0098 XTAl l I MH MC 18 LI 17 1 0018 1 t0 102 10 1 122 74l...

Page 106: ...10 9 8 7 r I IE iERIJ L L ____ o __ _j n SHIFI 0 ZU Ol4 Qjl RS 1 1 r L l iL i j 1 1 a _ 722 I Rll QZ 8 7 5 JI 3 C o 7 A p z P C t t T 1 R2 7 1 Y r G e K 1 2s lo SK 1 RZ l Ye 1 2 19 0 L4 II 741 16 _ _...

Page 107: ...0 z K I ov R Cl3 K IOUF 3 iV T C 0 I _ic lt G o OOS OUF 1ev 10 L 1 t J t R 3 V ___ l _ ___ l I BK 09 J J 11 1 ov _ _ t w l i l f 3 o v t 3 M P R t l l l 1 l J_ J 1 8 l l V OR E J 0 1 VR 11 10 9 8 7 5...

Page 108: ...O O 18 VAC T I F II R42 3 ll 70 l q w l 0 01 4 16 VAC Ta I Ell P 43 os n 3 o lW 1 00 l I A 20 a l W 14 0003 ov l_F9 YR 18 12 V 13 16V I Bii R31o 1 1 i K lo 1 rW 0 301 1 Gl 7 9 IUF IZ V C E 00 1 101 CZ...

Page 109: ...8KI 1A3 1010 COTS KP fl fl 4 10 9 R1 I 4Y ll I II 11 3 Cl tW j H _ TAl 2 457 Cl MllJ filO 11on 2 BK IG7 s OV 2 35 11 01413 toV IA IB 2A 2 A 38 4tl 48 15 STl I L25 SE 4 44 157 2 151iiii IEIO 5 SVR R24...

Page 110: ...f isv LlS 37 0084 15 J 20V T L26 37 022s 05 112 V L27 J7C 00 0 Ul i1 o1Hz L19 311o l271 MPSto512 L 30 o518 L31 3a 6 00il L3t 3 3 76 0294 Z8Pll f SO k ET L34 35 311o 0119 L31d 31 311o 00 4 PST 5 A l6 L...

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