Wang 640 Product/Maintenance Manual Download Page 65 | Manualshive

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Summary of Contents for 640

Page 1: ...WANG FLEXIBLE DISK DRIVE 640 749 2240 Models 2242 2243 Customer Engineering Product Maintenance Manual 3102 729 0134 A...

Page 2: ...l in this document may only be used for the purpose stated in the Preface Updates and or changes to this document will be published as Publication Update Bulletins PUBs or subsequent editions This doc...

Page 3: ......

Page 4: ...erein is considered company propri etary information and its use is restricted solely to the purpose of assisting you in servicing Wang products Aepro duction of all or any part of this document is pr...

Page 5: ...iagnostic 4 2 Model 640 Diagnostics 4 3 Model 2240 Diagnostics MAINTENANCE 5 1 Head Radial Alignment Check 5 2 Head Radial Alignment Procedure 5 3 Index and Sector Sensing Components 5 4 Carriage Stop...

Page 6: ...nel 8 6395 interface 9 6399 disk control Per ECN 4074 the 640 2240 use a 6297 1 and the 740 uses a 6297 2 The 651 drives are placed on either side of the controller and are Leferred to as Left and Rig...

Page 7: ...d multiple byte transfer to make it com itible with 710 DMS s 740 only 6 Cyclic Redundancy Check A built in check to insure tha data is read corrl ctly 1 3 1 3 1 HARDWARE NOMENCLATURE R Memorex Portio...

Page 8: ...against the Re 1d Write head and data may then be recorded or read from the disk The disk drive motor rotates the spindle at 375 RPM through a belt drive system 50 or 60 Hz power is nccomodated by mea...

Page 9: ...achieved when the disk is lightly loaded against the rigidly mounted head by energizing a solenoid This releases the bail from the spring loaded carriage load arm and causes the load arm pad to press...

Page 10: ...e of the PC boards is to the left except for the 352 regulator board which faces to the right Figure 5 shows the PROM layout and part numbers for the various units and capacities When changing the sto...

Page 11: ...Tl w Tl N CXl G c 0 o z rTJ t l 651 DISK DRIVE r 6390 MOTHERBOARD 0 0 z tr1 z t l 639 5 6296 6297 6298 6399 r I I I I ti I 0 Ul I C I L l I I r I If I I J52 I L __ L J l 651 DISK DRIVE...

Page 12: ...l rn rn rn rn rn FIGURE 5 PROM LOADING Voltage Checks 352 Regulator L8 378 0230R2 378 0234R2 378 02 l 7Rl 378 0223Rl 378 0238Rl 378 0242Rl There are four voltages that should be checked three being ad...

Page 13: ...ing the coated disks are encased in a flexible vinyl envelope eight inches square by one sixteenth inch thick which is sealed around the edges of the disk and lined with a self cleaning wiper An oval...

Page 14: ...tter is loaded into the disk drive correctly Each surface of a disk contains 32 or 64 tracks depending on the capacity of the unit The tracks are numbered from the outside inward starting with track O...

Page 15: ...DIRECTION OF ROTATION 0 3 SECTOR fJ E TRA TIMING MARK 11 8 0 TRACK 63 FIGURE 7 DISK DESIGN AND UTILIZATION 12 0...

Page 16: ...la e This iR r a Cyclic Redundancy Check CRC How Data Is Written On A Disk The Model 40 Wrices and Reads 256 bytes at one time The 640 and 2240 addresses are entire sectors The 740 is capable of writi...

Page 17: ...tes remaining unchanged c The buffer is then written into sector 2 d The reason the entire sector is read into the buffer is due to the CRC The CRC is calculated only for each sector and only when the...

Page 18: ...ch overlap from one sector to the next Therefore each sector CRC must be updated Example 3 WRITE 256 at Address 512 511 I512 ENTIRE SECTOR IS WRITTEN The procedure is not the same in this example as i...

Page 19: ...esult When removing the front panel insure that the control panel does nJt fall forward for it is modular and held in place by the front panel Disconnect the two ribbon cable connectors one of which p...

Page 20: ...access to the bolts A gap between the actuator bail and the actuator solenoid should be 030 076 cm measured at point A in Figure 8 this can be done with power off Should this need adjustment it is acc...

Page 21: ...nit next to the fuses The gap between the actuator bail and the load arm tab should be 015 005 038 cm 013 cm points A and B in Figure BA Should this need adjustment it is accomplished by loosening the...

Page 22: ...e for installing and removing the cartridges from the unit Head radial alignments and index alignments will be checked upon installation when a Field Service Alignment Cartridge is available for field...

Page 23: ...ADDRESS Used to select the unit for transfer of data When all down they equal 00 all up equal 15 Not used on 2240 7 LOCK ON When in the lock position no formatting is possible on allows formatting 8 F...

Page 24: ...the door The cartridge may be loaded or unloaded with power on or off When removed from the dr ve the cartridge should be stored in a plastic coated envelope To protect the cartridge follow these pre...

Page 25: ...orrected by reformatting the disk Every disk must be formatted at least once The formatting procedure results in the automatic recording of addresses on the disk which enables the disk controller to l...

Page 26: ...he format key to LOCK The 740 and 2240 automatically check the format before turning off the format light 5 Repeat this procedure frore step 1 for the other disk 6 Once both or all disks are formatted...

Page 27: ...ing table lists the transfer commands available in the 740 COMMAND CODE FUNCTION READ 1 0800 Transfers 1 byte from disk to 700 READ 8 0801 Transfers 8 bytes from disk to 700 READ 16 0802 Transfers 16...

Page 28: ...ssed by a two step command GROUP 2 OOXX where on the 600 keyboard GROUP 2 is a key 00 is all function switches up and XX is one of the register keys 00 through 15 The XX must match the setting of the...

Page 29: ...r write information store the disk address in register 00 of the 600 and the step number where transfer is to begin in the 600 in register oi The COMPARE 256 command compares the contents of one block...

Page 30: ...rcises the mechanical portions of the 740 1 Data Check Verifies 2895 2415 The Data Check programs write and read 1515s first block 2895 and 0000s second block 24i5 on any number of tracks keyed in by...

Page 31: ...d Program Verify 2895 or 2415 Prime c Enter 1 if 700C 2 if 720C Go d Enter number of tracks to be checked 1 If entire 740 to be checked key 64 Go 2 If entire 740 2 to be checked key 128 Go 3 Any numbe...

Page 32: ...Writer 701 702 711 721 740 1 or 740 2 Operating Instructions a Set address switches on 740 to 0000 b Turn on or select output writer as program does not perform this function c Prime Load Program Veri...

Page 33: ...the letter G is printed If an error exists the printer prints the address that failed with the letter E indicating an error at that location Registers used 00 01 02 Approximate running time is six 6 m...

Page 34: ...on d Key Search O Clear display results If 640 appears in the display and keyboard locked unit cannot be selected e Key in unit capacity 1 or 2 GO Printer prints capacity and letter M f Key the numbe...

Page 35: ...er Z c Compare Error When a compare error occurs the printer prints the following XX XX A XX XX B XX XX A XX XX B Beginning register number in the 600 that was used for the compare Incorrect data Disk...

Page 36: ...ECUTE e Key 1 for 2240 1 or 2 for 2240 2 f Key Y or N for TEST 1 Y for test Ill N skip test 1 NOTE It is advisable to skip TEST 1 the first time running the diagnostic because of the time re quired to...

Page 37: ...or 2222 2240 1 or 2 Operating Instructions a FORMAT the left and the right disks B CLEAR EXECUTE c LOAD EXECUTE d RUN EXECUTE e Enter 1 or 2 for a 2240 1 or 2 The program automatically loads the foll...

Page 38: ...edure 5 Carriage stop adjustment procedure 6 Track 00 switch assembly adjustment procedure As of this writing April 1974 the 651 drives will be treated as tape drives All repairs to the disk drives wi...

Page 39: ...4 Jumper wire with alligator clips on both ends 5 Phillip8 and common screwdrivers 6 Feeler gauges 7 Allen wrenches 8 Alignment cartridge 9 3 8 hex driver 10 Read Write adapter plug Remove the cable...

Page 40: ...ery index pulse The following maintenance procedures are written for the 740 and 640 Since the two units differ in addressing the first addresses are for the 740 and the addresses in parenthesis are f...

Page 41: ...ambient room temperature for at least 20 minutes prior to performing alignment procedures 1 Insert Field Service alignment cartridge into the cartridge guide 2 Ground TP28 on PC board to load the hea...

Page 42: ...scope to TP23 4 Apply power to unit and select unit Group II OOXX Access track 31 by keying 258048 1049072 for the right drive or 126976 496 for the left drive doing a Read 5 NOTE An alignment patter...

Page 43: ...ignment Check if not already done 2 Loosen three screws in head position actuator housing to baseplate clamps sufficiently to permit housing rotation Figure 12 WARNING The head position actuator is op...

Page 44: ...31 258048 1049072 for the right drive 126976 496 for the left drive 6 Compare amplitudes of two adjacent lobes They mu t equal within 15 if not repeat steps 2 3 and 4 NOTE The 15 tolerance in this st...

Page 45: ...hototransistor to the light emitting diode An adjusting screw on the phototransistor assembly permits positioning the phototransistor along the arc of the disk holes so that the leading edge of the in...

Page 46: ...c cm FIGURE 13 6 Access track 56 address 491520 1049472 for the right drive address 360448 896 for the left drive 7 Repeat step 5 8 If tolerances specified in steps 5 and 7 are not met perform index a...

Page 47: ...rotate detector shaft as required to position burst within first 20 ms of oscilloscope sweep 4 Expand oscilloscope time base to 1 msec cm 5 Rotate detector shaft to adjust burst so that first peak occ...

Page 48: ...tolerance specified may be caused by poor optical coupling between led and phototransistor misaligned track position actuator broken carriage or damaged Field Service alignment disk 5 4 CARRIAGE STOP...

Page 49: ...swit h is actuated hv 1 t im surfaCl on the c 1rr i 1gl assl mhly whvn the carr i age is in t i track fl position Fnllnwing the he 1d radial al ig1rnwnt tlii switch must he positi inecl so Lliilt ii...

Page 50: ...head so that the track 00 switch is dis engaged 7 Place 049 124 cm gauge between rear carriage stop and carriage 8 Retract head by turning head screw 9 With 049 124 cm gauge between the rear carriage...

Page 51: ...1048736 1048751 11 176 191 1048752 1048767 12 192 207 1048768 1048783 13 208 223 1048784 1048799 14 224 239 1048800 1048815 15 240 255 1048816 1048831 16 256 271 1048832 1048847 17 272 287 1048848 104...

Page 52: ...9248 1049263 43 688 703 1049264 1049279 44 701 719 1049280 1049295 45 720 735 1049296 1049311 46 736 751 1049312 1049327 47 752 767 1049328 1049343 48 768 783 1049344 1049359 49 784 799 1049360 104937...

Page 53: ...127 11 45056 49151 176128 180223 12 49152 53247 180224 184319 13 53248 57343 184320 188415 14 57344 61439 188416 192511 15 61440 65535 192512 196607 16 65536 69631 196608 200703 17 69632 73727 200704...

Page 54: ...07200 311295 438272 442367 44 311296 315391 442368 446463 45 315392 319487 446464 450559 46 319488 323583 450560 454655 47 323584 327679 454656 458751 48 327680 331775 458752 462347 49 331776 335871 4...

Page 55: ...2 32 47 3 48 63 4 64 79 5 80 95 6 96 111 7 112 127 8 128 143 9 144 159 10 160 175 11 176 191 12 192 207 13 208 223 14 224 239 15 240 255 16 256 271 17 172 287 18 288 303 19 304 319 20 320 335 21 336...

Page 56: ...75 36 576 591 37 592 607 38 608 623 39 624 639 40 640 655 41 656 671 42 672 687 43 688 703 44 704 719 45 720 735 46 736 751 47 752 767 48 768 783 49 784 799 50 800 815 51 816 831 52 832 847 53 848 863...

Page 57: ...ion from 640 740 to 2240 1 Change PROMs on 6298 board 2 Change jumper on 6395 from SMHz to lOMHz and turn all switches ON 3 Change the I O cable END Amphenol Fingerboard WIRE FROM Pin 33 Pin 13 54 WIR...

Page 58: ...I...

Page 59: ...nance Only unit differences are explained in this Bulletin NOTICE This document is the property of Wang Laboratories Inc Information contained herein is considered company propri etary information and...

Page 60: ...ts and Switches for 2242 and 2243 3 2 Loading and Handling of Jisk Cartridges 3 3 Disk Formatting 3 4 Addressing the Disk Cartridges in Each Model 2240 2242 2243 DIAGNOSTICS 4 1 2240 2242 2243 Microco...

Page 61: ...sequentially from 0 1023 The 2242 is identical to the 2240 except for the following a Only one disk drive is used it is located on the left of the unit h The door on the right is secured by bolls to h...

Page 62: ...378 0283Rl L4 378 0285Rl 17 378 0284Rl c The motherboard is changed from a 6390 to a 6538 LB 378 0286Rl d The power supply motherboard is changed from a 6391 to a 6539 e The front panel is changed to...

Page 63: ...539 POWER SUPPLY COMPONENT SIDE L 6540 REAR 6538 MOTHERBOARD w 0 H CJ E 6399 6298 6297 1 6296 z 0 6537 t u Jl J2 L 651 DISK DRIVE 651 DISK DRIVE 651 DISK DRIVE DISK Ill DISK 112 DISK 113 FRONT FI GU R...

Page 64: ...hanging on its resting surface Remove the two front mounting bolts With the center disk removed all the adjustments outlined in S B 46 should be performed CAUTION Upon assembly of the front panel insu...

Page 65: ...when any disk is being formatted Flashes when data transfer is attempted while the format key is ON DISK SELECT LIGHTS 1 2 and 3 2243 ONLY Indicates which disk is being formatted or accessed 3 2 LOADI...

Page 66: ...imately 40 seconds to fonnat a disk if the first attempt is successful The 2242 and 2243 automatically try to fonnat a disk four times Should the fonnat light remain on for more than 3 minutes the sys...

Page 67: ...OT LEGAL MODEL 2243 DISK Ill DISK 12 A special procedure is required to address the third disk The F or R parameter must be included in a disk statement to access a particular disk cartridge For examp...

Page 68: ...zes disks tll and t 2 with the F and R parameters respectively Disk t 3 is considered as being a separate unit and is accessed by the F or R parameter and address 350 For example 10 LOAD DC F 350 PROG...

Page 69: ...he 2240 2242 2243 Microcode Diagnostic checks the following instructions a DALALOAD DATASAVE DC OPEN b DATALOAD DATASAVE DC c DATALOAD DATASAVE DA d DATALOAD DATASAVE BA e DSKIP DBACKSPACE f VERIFY g...

Page 70: ...3 Hardware Diagnostic checks the following instruc tions a TEST 1 Writes at every sector address and reads the information to check for errors b DATASAVE DA DATALOAD DA from 1 to 10 variables c ALPHAN...

Page 71: ...2 Operating Instructions a Fomrat all disks to be used b Insert tape into tape drive c Key CLEAR EXECUTE LOAD EXECUTE RUN EXECUTE d Key correct number EXECUTE if not already formatted and rewind e Key...

Page 72: ...n 113 of 6395 board and remove the ground 3 Remove the right door and hold bracket for the right disk 4 Install right disk drive and interface cable 5 Connect AC line to disk drive 6 Replace front pan...

Page 73: ...o w L 4 fT l70 0llJ go L 11140 w z 10 0111 2 DO NOT la ST OH MOOU U O r Jt no1 1 C 4 101 1 t fMuDUll 1 i iic _ lr11 11 c tl rliiO ir_ 1 i _ f7 t t t OA_ D f ___ l_ _CJCT i D 0 c c i 1 li L 1 P wo s 8...

Page 74: ...I L_ l Jrf 1l 1 p r _ lllfllftr QJl I I kUWf l f 1l 1 r Bfl Oil l f 1 t m f _ _ _ 1 r i t l li tt _ _ _ l _ _ _ __ ___ le r 1 G I j t 11 ___ __ 1 L l Ii 1 1 _ 11_ _1 i10 l t_ _lHf _ p _ f__ __ ll _ 4...

Page 75: ...II 1 b 1 u uu I 11 1 ______r 1 __J J__ l TIO I I IO...

Page 76: ...1 J I mmrnmrm mnIB l I r 1 k to t t 1 1...

Page 77: ......

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