IBM 3420 Reference Manual Download

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Summary of Contents for 3420

Page 1: ...J 1 1 1 1 1 J J 1 1 J 1 1 J l 1 1 J 1 I 1 J J 1 1 1 1 __ I 1 1 1 1 1 I 1 1 1 J 1 J J J l 1 1 J J J J J J 0 J J J J J J J J J J J J J J l J J IBM 3420 3803 Magnetic Tape Subsystem Reference Guide...

Page 2: ...through the guide and get an idea of what is included Pay particular attention to the NTF Service Checks portion of each area It is intended to give you a list of actions to be performed which may hel...

Page 3: ...ysis Read Write Head Service Hints 3420 Read Write NTF Ch ck1ist Tape Developing Procedure Developed Tape Samples 3420 RD WR Data Flow 3420 Tape Motion Service Techniques 3420 Tape Motion NTF Checklis...

Page 4: ...Channel Interface 3803 DC Voltages 3803 Mod 1 to 2 6250 Conversion Tips 3803 Conversion Tips from Data Bank 3803 Preventive Maintenance Schedule 3803 Sales Feature Codes 3803 1 Feature Identifier 3803...

Page 5: ...GENERAL...

Page 6: ...00 bpi NRZI 16 7 10 0 6 2 556 bpi NRZI 24 0 14 4 9 0 200 bpi NRZI 66 7 40 0 25 0 Passing Times IBG ms 6250 bpi 4 0 2 4 1 5 9 Track PE and NRZI 8 0 8 0 4 8 4 8 3 0 3 0 7 Track NRZI 10 0 6 0 3 75 Rewin...

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Page 8: ...e subsystem connects to the Magnetic Tape Adaptor MTA inter face of system 3115 or system 3125 The term MTA interface refers to a set of lines over which control and data signals are exchanged between...

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Page 10: ...lity even with existing tape libraries Greatly expanded error correction capability has been engineered into GCR Higher data rates and lower access times give higher throughput and reduced channel tim...

Page 11: ...Redundancy Check group is encoded This group with the auxiliary check character ensures the integrity of the read and write operation including verifying any error corrections which may have taken pl...

Page 12: ...RECORDING PHILOSOPHY continued NRZI Example A o o o o 1 u L Write Signal Analog Read Signal Read Digital Output PE Example B Write Signal Read Digital Output 7...

Page 13: ...RECORDING PHILOSOPHY continued GCR Example C o o o o J I I I ________ n_______1 L J I I I I I I I Physical Size of a 4K Byte Record NRZI 800 PE 1600 D GCR 6250 8...

Page 14: ...stand ing that they are intended to be a national average They are not a certain indication of reliability to be obtained in individual accounts because of the influence of unmeasured variables ie cus...

Page 15: ...s a media failure Try to recreate write failure using same tape and 3420 if possible Use pro c dure shown on Permanent Read Analysis Sheet 3 except perform write instead of read Also see MLM 5A 105 10...

Page 16: ...mark failure with felt pen read tape on another tape unit Permanent Read Error Analysis Chart Reference MLM 00 011 Sheet 3 Online Run FRIEND OLT T0200A or have customer run ditto or equiv alent tape...

Page 17: ...EREPI continued Yes Return to original tape unit Look for physical damage on tape Develop tape Refer to section on tape damage No Permanent Read Error Analysis Chart Sheet 4 Refer to section on devel...

Page 18: ...re in this book The purpose of scoping a permanent read error is to locate the failure within the block and determine the cause Proceed as follows 1 Locate the failing block offline 2 Loop on the fail...

Page 19: ...any portion of the block in detail Note Detailed observation of a PE block is difficult due to normal distor tion of the PE signal and the high amount of skew the PE detection circuits can tolerate Ex...

Page 20: ...0 SIOs I Any CUA entry meeting criteria may be ignored Those not meeting criteria should be logged in a manner so as to give the CE a method of spotting consistently outside criteria volumes or CUAs S...

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Page 22: ...yte 4 High and Low Tape Unit Serial Number G05 Byte 5 Air Flow High Order High Order Voltage Check Serial Number Serial Number G04 Byte 6 Allows Read Bus and Tach Pulses Crease Tape G03 Byte 7 Load Bu...

Page 23: ...fer Check CRC III 17 54017 590 6250 Tape Control Spare Spare Tape Control Unit 17 600 Write 16 180 17 600 17 600 00 007 Reserved 00 007 D Byte 10 Command Status Reject Spare Control Status Reject No B...

Page 24: ...Review 3803 3420 Service Aids on microfiche C Always clean the R W head before adjusting the AMP Sensors A build up in the head slots can make it difficult to clean thoroughly at times D R W card to h...

Page 25: ...0 C If Not Ready Go to 15 090 A Auto Cleaner Binding B Not Able to Read Track 1 6250 or Track P 1600 Dirty or Defective Head C Damaged Tape in Inverse TM Area But After SAGC Area D Read Card or Cable...

Page 26: ...03 C Could be a Signal Line Grounded to the Plated Connector on the Cable Going from the CU to TU D 6A 160 Modell 5 7 5B 000 Model 4 6 8 E 15 020 16 160 22 No Bor WritelWTM A Capstan Moved but Tape Di...

Page 27: ...ach Busy line at Tape Drive Interface E 17 600 and 16 180 23 A Losing a Track on WTM Usually Caused by Tape Lift Off Inspect R W Head and Tape_ B Read or Write Card C 5A ooo 5B 000 D 17 180 A Tape Cre...

Page 28: ...4 6 8 D 17 170 A 1600 bpi WTM Read Card B Not Able to Detect EOO C 5A 000 Model 3 5 7 5B 000 Model 4 6 8 D 17 150 A Check Byte 2 for Error Track B Generally Caused by Lift Off Due to Head Being Dirty...

Page 29: ...Tach Cover Rubbing Capstan D Check for ENV Envelope or MTE on 5A QOO Model 3 5 7 5B 000 Model 4 6 8 E 17 170 A Very Unlikely a Tape Drive Problem Except in NRZI Mode B 5A 000 Model 3 5 7 5B 000 Model...

Page 30: ...Operation Check for Proper Seating of Read and Write Cards B Erase Head Not Erasing Properly C 5A 000 and 17 370 A 5A 000 B 17 170 26 A 7 Track C Compare is Set When Combined Data P Does Not Match Re...

Page 31: ...NRZIOnly Functional P 7 Track Functional Tests Tape Unit NRZIOnly Functional Q Long Record Write RDB Read Subsystem PE 6250 NRZI Functional R Write Reliability Subsystem PE 6250 NRZI Reliability RO MA...

Page 32: ...sleading This is due to errors that are forced by the OLTs OLT WR has an EXT option whereby sense data to be analyzed can be entered from the keyboard Example DEVj3420WRjEXT SNS 804400 8000002C0000080...

Page 33: ...eters of the 3803 Mod 2 has been been generated by a unique machine for this purpose and cannot be created or duplicated by any other known method This tape is used in conjunction with OLT diagnostic...

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Page 35: ...in the machines sense byte chart with references to descriptions a symptom index page 0 010 for normal entry into the MAPs a quick index page 0 009 for entry into the MAPs when you have one of the sym...

Page 36: ...failures offline and procedures for performing various CE panel functions extracting sense data restart on ALV error etc MAP procedures for ALV hangs or loops channel busy timeout or other indications...

Page 37: ...for each card to assist in card swapping Logic net cross reference list The MAP scoping procedures allow you to identify a failing line and the FRU from which this line originates If replacing that F...

Page 38: ...ite service requirements Microprocessor theory TCV oscillators clocks counters and controls second levels and theory TV selection and priority Loop write to read LWR purpose operation and data flow NR...

Page 39: ...CE panel Sync on Go Forward T AIF2J10 and scope all tracks read card test points and ensure that the signal is good on all tracks in zones 1 and 2 tracks P 0 5 and 2 6 7 Measure the amplitude on trac...

Page 40: ...ng backspace after a write error caused by erratic tape motion not installed 3420 R W head forward to backward ratio is out of specifications 3420 Tape sticking 3420 Dirty capstan 3803 Missing Suppres...

Page 41: ...rewind Models to allow autocleaner to return is not installed 4 6 8 3420 Damaged tape at load point 3420 Contamination on the Read Write head or the capstan is glazed 3803 Defective 01 A A2D2 MST car...

Page 42: ...3 1 Tape Tracking leaves a faint TM where existing files are updated because of the overwriting of the old EOF TM In this case the writeheads actually do the erasing of the old TM 3803 1 Defective 01...

Page 43: ...and 4 Degausser see Note 1 Developing Solution Digtec 251 Meter Digitec 201 Meter PIN 453046 may be used if it is avail able Scale 0 to 6 pounds belt adjustment Capstan Prealignment Gauge Capstan Adju...

Page 44: ...Tee and Hose Assembly see Note 2 Tape Development Solution Tape Unit Tester Shim Right Reel Hub Adjustment Hex Wrench Right Reel Hub Adapter Hose see Note 2 Pressure Divider see Note 2 Tape Unit Clea...

Page 45: ...unit at the Tape Test Center with accuracy held to within 0 375 usec total skew between the leading and lagging bits of a 112 ips tape unit The master skew tape will run off the reel when reading forw...

Page 46: ...nit Do not place the tape on top of the tape unit 2 Plug degausser into 110 Vac receptable 3 Press the pushbutton on the degausser while it is at least one foot 30 5 cm away from the read write head a...

Page 47: ...quantities of resistors on hand See part numbers below 3803 MST Flat Cable Replacement see General CEM 251 3420 MST Flat Cables Replacement PIN 5802133 uses PIN 580218048 in PIN 5802181 64 in PIN 5802...

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Page 49: ...MEDIA...

Page 50: ...bad tapes then consider contacting your IRD PEP Specialist The PEP performance Evaluation Program Specialist is a person expertly trained in all phases of magnetic tape evaluation He can provide assis...

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Page 52: ...should be stored in an area where the temperature is between 40 degrees to 90 degrees F 4 degrees to 32 degrees C and 20 to 80 percent relative hum idity nominally 70 degrees F at 35 percent relative...

Page 53: ...s of the follOwing test procedure the tape should average at least 40 000 read passes before a permanent error is encountered Procedure Write a length of tape from load point with ten 2000 character r...

Page 54: ...order to determine the effect of wear part icles generated during the test do not clean the tape unit between passes 3 library Quality Definition A measurement of the quality of tape is its write cap...

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Page 56: ...nt over This may be due to improper stacking of multiple reels not in con tainers or cartridges designed to be stacked or squeezing the flanges while handling or mounting a tape 4 The flanges of the r...

Page 57: ...nst loose wraps further in causing Z fold Z folds can be avoided by adequate customer controls in tape handling properly crimp ing end of tape and library management Also beware of poor temperature co...

Page 58: ...3420...

Page 59: ...number 10 EREP would show nine erase gaps actual number but only one temporary write error The reason for this is that write errors occurring while ERP has control are not logged to EREP while all er...

Page 60: ...Tape slip causes the tape to be incorrectly positioned When the write head becomes active it then erases part of the previous record The record before the error record that the erase gap command was s...

Page 61: ...oad Point Possible Causes Record t I IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII IIIIIIIIIII tFaint Line Approximately 050 1 3 mm After End of Record a Gaussed or magnetized read write head b Erase head not work...

Page 62: ...a customer good quality representative tape and write it at 1600 bpi on the unit being checked Write it from the field tester with frequency switch set to 32 3 Read forward to the middle of the reel...

Page 63: ...e the Read card test points to determine the fwd to bkwd ratio Display three Dr four cycles of read signal and use as much of the scope display as possible for measurements 2v cm For ease or recording...

Page 64: ...her densities several problems are encountered As density in creases the preceding and following bits flux fields tend to interfere with the middle bit see Figure 1 This phenomenon is known as phase s...

Page 65: ...on is displayed ie logic XC701 drive 0 A3Q2 DI2 Refer to Chart L for your machine configuration If you have the entire subsystem sync point mark 1 logic BW151 Al G3 M12 may be used If any phase point...

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Page 67: ...lean the head Read head card and write head card seating Failure Analysis Sense Data Sense can be obtained from the following areas EREP Console messages OLTs The sense data can be analyzed using the...

Page 68: ...5 in the backward direction Note This is a check Do not use for adjustment See MLM 08 150 08 151 08 160 Bit Positioning Improper bit positioning can be caused by an improperly adjusted skew plate Fai...

Page 69: ...justments of 5 volts or greater in a short period of time Factors that may indicate a failing head when the head is not failing 1 Low vacuum 2 Tape hitting obstructions in the tape path Erase head Fil...

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Page 71: ...use on the 3420 3803 Read Write Problems Models 3 5 7 Most probable causes 1 Read head card defective 2 Write head card defective 3 T AIL2 T A112 T AtM2 NRZI tlefective 4 R W head defective 5 Erase h...

Page 72: ...ressure and vacuum see 08400 2 4 Vdc and 6 Vdc power supplies in tolerance see 08 570 3 R W head and cleaner blade must be clean see Note 4 on SB 001 4 Capstan tachometer timing see 08 120 5 Degauss t...

Page 73: ...on oxide side of tape on each side of R W head with a felt tip marker Carefully remove enough tape to reach the flat surface table etc Shake the developing solution then immerse the affected area of t...

Page 74: ...the drives themselves Conclusions Some of the more common problems which will be detected by tape devel oping are a Partially erased records before an ERG Usually caused by a glazed capstan b Noise in...

Page 75: ...Relationships 15 1 18 Erase Gap ERG Distances Density 6250 1600 800 7 Track Interblock Gap Size Density 6250 1600 800 7 Track Developed Tape Examples __ To BOT t Data Block Single Successive ERG ERGs...

Page 76: ...small Z folds area appeared area A Prior to performing an erase gap the software tried to back tape up to last interblock gap but stopped in creased area instead thought it was the gap From there a no...

Page 77: ...ata Flow AIK6 AIJ2 Read Data Flow AIL2 71 Connector AIN2 Connector AIT3 R W Head Pin Layout Models 4 6 8 Only L Mounting Plate 4 0 0 0 t 0 6 0 0 0 0 0 0 0 0 t o 0 1 0 0 0 a 0 2 0 0 0 r 0 en p 0 0 0 en...

Page 78: ...middle pin on each track Read Pata Flow ectQr 1 4 AIL2 Read and Write Data Flow Within 3420 Models 3 5 7 Only See MLM 5A 100 or PF 5 100 for Details AIM2 NRZI Read Deskew NRZI Only 72 Connector AITJ...

Page 79: ...apstan Service Techniques Glazed Capstan Leaky Transfer Valve or Column Vacuum Door Open Capstan Motor Segment Open Capstan Motor Segment This procedure is performed only if glaze cannot be removed by...

Page 80: ...scrub the capstan rubber thoroughly until the capstan attains a dull rubber finish d Follow up with a lint free cloth moistened with tape cleaner to remove all traces of the cotton swab e Verify the e...

Page 81: ...oon crack again Transfer Valve Leakage Test 1 Cover the stubby column ports with masking tape See Figure 1 Do not let the tape overlap the stubby bars 2 Place an 8 inch piece of magnetic tape in the b...

Page 82: ...AA2D2 Byte 7 Leaking File Bit 6 Hub Air Bearing or Hub Switch Byte 18 Check Voltages Bit 0 Dirty Filter Defective Cooling Fan Check Cooling Air Sensor A1C2 A1H2 Fuse Detect Card Models 3 5 7 At E2B09...

Page 83: ...ION NTF CHECKLIST Perform these checks precisely as described in MLM Check adjust if necessary BOT EOT 08 580 Capstan Tachometer Adjustment 08 120 or 08 130 Pneumatics 08 400 all and 08420 Reference M...

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Page 85: ...int Threading Chute Left Threading Channel Upper Right Threading Channel Upper Cleaner Blade Capstan Motor Right Threading Channel Lower Transfer Valve Assembly Actuated for Threading Left Reel Hub l...

Page 86: ...l 8 Only Automatic Latch Upper Restraint Cartridge Pressure Lower Restraint Threading Chute Left Threadi ng Channel Upper Right Threading Channel Upper Cleaner Blade Capstan Motor Right Threading II C...

Page 87: ...7 Power check light flashes Phasing bad or TPl 1 2 3100se 8 Drops vacuum Bad solder connection O V U V reference card socket 9 Power check load check lights flicker K1 relay on reel board points burn...

Page 88: ...ted cap Cll on XFMR 38 Blows OVjUV card HS l transistor on power interface board 39 Load check light flashes loose fuse 3 or F3 holder 40 Lights flicker with vibration suspect any fuse holder 41 Plus...

Page 89: ...POWER NTF CHECKLIST Check that air filter is clean and blower is running smoothly Check adjust DC voltages watch for excessive ripple content Check for loose power supply screws if problem is recurrin...

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Page 91: ...at T Al G2Bl1 If voltage exceeds 6 24 V check the file protect circuitry for re sistance 2 The maximum allowable ripple voltage is 24 mv peak to peak measured at the power supply Models 3 5 and 7 If...

Page 92: ...Supply Value Test Point Ground 6v O 05v See Note 1 and 2 T A1G1E09 T A1G2D08 11v 2v 1 2v TB2 1 TB2 4 4 05v O 05v See Note 2 T A1N3D02 T A1N3D08 48v 7v 9v TB1 9 TB1 8 12v 1v TB3 1 TB1 8 12v 1v TB3 5 TB...

Page 93: ...Note 2 T A1 H1C09 T A1G2D08 48v 9v 9 6v TB1 9 TB1 8 12v 1 4v O 9v TB2 1 TB2 4 12v 1 4v TB2 5 TB2 7 11v 1 7v 1 1v TB3 12 TB2 4 If you have a modified power supply check voltages at the following points...

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Page 95: ...3 RPQ features If features and or RPQs were ordered for the 3803 1 3420 3 5 7 they must be installed and operational before doing the conversion If features and or RPQs were ordered for the 3803 2 co...

Page 96: ...e that the R W card cables are connected correctly It is possible to miss the top pins of the R W card connector 2 Before removing the R W cable guide observe how it is mounted on cable connector and...

Page 97: ...ace power supply 16 Rework or replace power interface miscellaneous board If converted to a Model 6 or 8 1 Replace vacuum column glass with one that has a resonator The following additional rework is...

Page 98: ...t part number was stamped on the assembly 3420 No read or write after conversion to 6250 Open paddle land to AIN7D02 or could be an open solenoid or cable 3420 Various errors after model change check...

Page 99: ...mirror 6 Clean the fiber optic lamp Use a tissue lightly moistened with water CAUTION Allow lamp to cool before cleaning Remove the manifuld and fiber bundles to provide access to the lamp Replace th...

Page 100: ...required Replace parts ment B M 8492273 Puralator type filter B M 8492274 Cuno type filter Tape 12 months Replace the tape cleaner block Supplied with Cleaner parts replacement B M Block Pneumatic 12...

Page 101: ...s will clean the reflective strips located inside the left reel Reel Tach 12 months Check reel tachs for glaze Replace reel tachs if glazed Glass Bead 12 months Inspect glass bead tape on stubby bar a...

Page 102: ...ubing Tubing order B M 4416409 Note Inspect the glass bead surface of the stubby bars and vacuum columns Replace if the glass bead is nicked scratched burred or has an area obviously worn to the touch...

Page 103: ...0 6250 Density Choose X l 6425 6250 1600 Density Only One X 9903 208 Vac Power Choose X X 9905 230 Vac Power Only One X X 9041 Red Covers X X 9042 Yellow Covers X X 9043 Blue Covers X X rJ l 1 4 9045...

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Page 105: ...Check for spring loaded guides attached to the D bearing and ramp Check for a large visible capacitor just below fuses 10 13 on the outside rear of the power supply Piggy back supply Check rear castin...

Page 106: ...Correct mid tape load failures REA 24 23860 paper only composites E004 008 734062 A Prevent tape damage Prevent catch from popping out of lower restraint when using a cartridge REA 24 23847 103 Check...

Page 107: ...damage and tape dump REA 24 23866 picked up by E026 014 734056 E Prevent velocity checks air bearing collapse due to low air bearing pressure 104 Checkpoint Check for 16 holes in high speed rewind pl...

Page 108: ...ic page ZT023 paper only 021 734068 A Correct PE write cur rent for the P burst and tape mark 105 Checkpoint Check for large 0 38 diameter hole in right threading channel Ensure proper belt align ment...

Page 109: ...lash on tape during a mid tape load REAs 24 23889 24 23874 029 734456 E Add integrator to window closed switch This EC cor rects a safety prob lem REA 24 25031 106 Checkpoint Check for EC 734280 on YB...

Page 110: ...rld Trade Only 036 734288 E 50 Hz only Pre vents transfer valve solenoid from burn ing up 037 734504 E Installs 15 amp fuse for F12 and F13 in stead of lOA Used for 48V in left right reel motor Tradem...

Page 111: ...CA E031 composites E031 042 734754 E Capstan cover holder 043 734470 A Reduce exposure to picked bit dual density only Im prove PE write performance 108 Checkpoint Check for 15 amp fuse in F12 and F13...

Page 112: ...on Elimin ates intermittent shorts dropping ready caused by leads shorting to ac ground 048 734532 E Solder the slip on blade connectors on the power interface board Decreases power checks Com posites...

Page 113: ...055 734956 A Eliminate mechan ical noise caused by the file protect pin hitting a file protect sensor on some tape reels 110 Checkpoing Check for 45 degree bracket holding fiber optics lamp Check for...

Page 114: ...M Provide correct Ioca tion of capstan motor removal instructions 063 736803 E Remove filler block from actual inter ference 064 736932 E Power logic update 111 Checkpoint None Check for EC 734949 st...

Page 115: ...leaner ribbon still on head 074 736683A E Install latest level logic page YC031 112 Checkpoint 3420 4 6 and 8 check 01A A1K2 for PIN 8237090 3420 all remove left or right reel tach and look for white...

Page 116: ...e 113 Checkpoint 3420 4 6 and 8 check 0IA AIH2 card for PIN 8237044 3420 4 6 and 8 with piggy back power supply check for wire No 1 of cable PIN 1767877 on TB 3 5 on front of the power supply 3420 3 5...

Page 117: ...World Trade Only 091 World Trade Only 092 World Trade Only 093 World Trade Only 094 443899 A Provides plated I O cable connectors to minimize ESD prob lems 114 Checkpoint Inspect three way valve atta...

Page 118: ...de Only 099 World Trade Only 100 World Trade Only 101 449068 E To provide a current bypass for an inter mittent connection between heat sink and land pattern at the unregulated portion of the 4 and 6...

Page 119: ...ent of the cartridge retaining button Released for recording of time and parts Cannot be ordered as EC 106 449093 E Decrease reel motor circuit board failure Installs 1 3 ohm reel motor current limit...

Page 120: ...se Write Load Current I Rewind Control Sense Read Reel Cartridge Capstan Byte Deskew and Door Control Power Control Interlock Unused On and FT10X 3 4 5 i I Reels Sense Write Decode Loaded Resets Data...

Page 121: ...SAGC Reel Cartridge Control Control Decode Erase Check Control and Door FT28X Reel Interlock Mech Bus Out Control Cartridge Reel Write Ready Controls Polarity Control Data Density Tach Busy Window Ho...

Page 122: ...Component Side A1 L2 Card Connector Edge o 1 1 2 4 8 16 32 64 32768 128 Serial Number Reference Logic A61 06 Serial Number Multiply Model Number Times 10 000 Example Model 3 x 10 000 30 000 Subtract...

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Page 124: ...CARD JUMPERS MODELS 3 5 7 continued A B F1 F2 Example NRZI A B Features Basic NRZI 7 Track E1 EC Level E2 Example EC734030 E3 E4 EC 733999 EC 734030 123 F1 A B A F2 A A B E1 E2 E3 E4 A A A A B A A A...

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Page 126: ...EC I I 1 Level 1 1 1 I 1 1 1 I I 1 L____J I I I r l _I I I I I Features I L___ J IModule I IModule I r Component Side A1 L2 Card Connector Edge n n I J3 I Models Model 8 4 and 6 2 IgggC I I DJ Write H...

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Page 128: ...riginally Model 3 64 128 Example 37485 Plug all Bits Either 0 or 1 Plugged 30000 Serial No 10 000 x 3 A 3 C1 C2 Example C3 Model 5 A B 7485 to be Plugged Old Model Number Plug Original Before Conversi...

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Page 130: ...854 Model 3 4 5 6 8 7 3 4 5 6 7 8 8 i1ti 2 26 38 25 59 27 95 20 28 19 69 Note If pneumatic belts come off do not reinstall use new belt When installing new belts do not roll them onto pulleys Loosen m...

Page 131: ...4 5 6 Elbow nears IDE pointed away from the casting Preliminary performance at 750 F 23 90 C and 25 00 inches 635 mm Hg for B M 8492827 and 8492829 vacuum 21 70 1 50 inches 551 2 38 mm H20 at 16 70 1...

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Page 133: ...5 6 7 8 7 8 3 4 5 6 7 8 3 4 5 6 7 8 BM Bottom Mounted Motor 2 39 37 39 37 40 55 19 17 20 28 Note If pneumatic belts come off do not reinstall use new belt When installing new belts do not roll them on...

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Page 135: ...ging altitude with a flat belt pneumatic supply Altitude 60 Hz Altitude 50 Hz 3420 Above Above Models 0 4000 4000 0 4000 4000 3 5 8493017 8493015 8493022 8493019 7 8493018 8493016 8493023 8493020 4 6...

Page 136: ...LEFT 2515410 60 Hz 1765389 LEFT 1767850 60 Hz 1765390 LEFT 373065 1767833 50 Hz 2513074 RIGHT 2522837 50 Hz 1765390 RIGHT 2524644 50 Hz 1766045 50 Hz 1767849 50 Hz Note Motor PIN 2513168 and board PI...

Page 137: ...9448 4169449 4169450 4169451 Manifold Color Grey Black Green Red Model 7 NRZI 7 PE 3 5 4 6 8 If the 3420 was ever NRZI or had EC 736028 installed on a Model 7 due to use of back coated tape the red ma...

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Page 140: ...croprocessor Card Locations MP1 ALU B2C2 RDS B2H2 RDS Reg B2D2 B2E2 Clock B2F2 Instruction B2D2 Decode LSRs B2C2 Xout A A2T2 Xout B A2T2 D Reg B2C2 Write TUBa TGRS 1 Ecc A1D2 MP2 A1G2 A2N2 A2H2 A2M2 A...

Page 141: ...n Bfr A1F2 32 x 9 CRIC CROC 141 Chan Bfr Gate A1G2 Write Group Bfr 1 4 x 9 A1H2 Write Group Bfr 4 x 9 A1H2 Xlator Y1K2 Y1 L2 Y1M2 Write Encode A1H2 Fon nat CTRL A1G2 Group Bfr Y1K2 Y1 L2 Y1M2 5 x 9 Po...

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Page 143: ...is field may be a branch condition or ROS page number Field 2 is generally a constant referred to as a decimal number or by a symbolic name The value of symbolic constants for each microprocessor is l...

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Page 145: ...tool This card plugs into A2G2 for MP2 B2J2 for MPI Reference MLM 80 030 or PF for a description of patch card plugging Microprocessor Card Interchange List The following is a list of cards that can...

Page 146: ...Make the ALU Loop on an Error There are two positions on the ROS mode switch that can be used to make the ALU loop the RST ERR and RST CMPR If the RST CMPR position is used the ALU is reset before the...

Page 147: ...d out something else must be wrong within the net If an I O command is involved in troubleshooting a problem offline a contingent con nection might occur This condition is apparent if ALUI stops with...

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Page 149: ...IBG all tracks down anytime the P track is tested and not seen If no IBG a 6250 tape is assumed track 1 active and not capable is set FIX The ALU 2 patch works as follows W O 7 track drives attached...

Page 150: ...error on specific tape Error every record PROBLEM ISOLATION AIDS Tape reads error free on 2803 and may on 3803 Mod 1 2803 does not check postamble length on a read 3803 Mod 1 allows about 49 zeros whi...

Page 151: ...tes lost device end Also have contingent connection This patch may be applicable to 3158 and 30XX systems PROBLEM ISOLATION AIDS Install CE latch to test for the following conditions AND A2R2PI0 FD041...

Page 152: ...Busy ALU 1 Change 02 4 to unconditional branch to next instruction Mod 1 Change 02DD to unconditional branch to next instruction Mod 2 yelocity Patch 3803 Mod 1 I P 2 0 3 0 4 0 5 202 6 N A 3803 Mod 2...

Page 153: ...at EREP would do a sense and print out the sense bytes thereby telling what type of error existed The MVS and VS1 zaps have been tested at the stated levels correctly but the zap for SVS has not been...

Page 154: ...VSl Zap Tested for Release 050 and 060 Module IGE03001 VER 32A 4710 F33A 9103 A008 4770 F340 VER 3B8 0008 OOOA 0000 REP 332 47FO F3CO REP 3CO 9103 A008 4770 F340 9120 A002 4780 F336 9601 A008 47FO F34...

Page 155: ...se time if no other bit is on in sense byte O ALUI Error W O ALU2 Error 1 Disconnect in is raised and an interface control check results Channel issues selective reset 2 Unit check is presented in ini...

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Page 157: ...el 1 2 N P12 p J1 0 B2V5D09 I Channel A S05 PIN 8235422 Plug in any Unused Socket 3803 2 A1N2 I L__ B2T5D09 Channel B Holley is prewired to stop if J09 interface pin goes active Use Tri Leads for Back...

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Page 159: ...e customer to experience a job abort andlor system hang instead of a probable recoverable error when the ALU error occurs 2 Use MST CE indicator latch card PIN 5851882 see Tools and Test Equipment CEM...

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Page 161: ...008000AOOOO REP 30E 47FOF39E REP 39E 9103A008 4770F320 9120A002 4780F316 9601A008 47FOF320 VS1 R030 Name IGE03001 VER 316 4710F326 9103A008 4770F326 VE R 3A4 0008000AOOOO REP 314 47FOF3AA REP 3AA 9103...

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Page 163: ...453585 or equivalent when making adjustments and exercise all standard safety practices VOLTAGE SIGNAL LEVELS 12V MST 1 6V 4V 12 0 8 0 0 7 o 0 61 0 96 1 57 2 35 6 0V 4 0V 0 3V O lV Gnd Shorted Open O...

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Page 165: ...e prerequisite E Cs must be installed on the machine and the machine tested prior to installing the conversion kit 3 RPQ features If features and or RPQs were ordered for the 3803 1 3420 3 5 7 they mu...

Page 166: ...les and jumpers have not C Double check all card plugging to ensure that they reflect the converted status of the machine The original serial number of the TU should be plugged not the new model that...

Page 167: ...3803 MOD 1 TO 2 6250 CONVERSION TIPS continued 6 When installing the channel flat cables in the B2 board hold them firmly seated in the logic board while tightening the clamp 167...

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Page 169: ...y to 4 03V FIX Install as required ECA 039 EC733838 The EC is an as required for a Mod 1 but this ECA is not available for a Model 2 3803 Therefore if it is not installed prior to conversion you may h...

Page 170: ...version Inversed tape mark is missing Sense on write from load point is 1044000000403B000808000000875A Read operation in 6250 mode and read write operation in PE mode runs error free Microprogram dete...

Page 171: ...for mounting capacitors C1 C2 and C4 B2M2 PIN incorrect per EC 734874 checklist for conversion to 6250 bpi Current plug chart in 3803 Volume 1 may reflect B2M2 to be PIN 8218309 at EC 733816 and PIN 8...

Page 172: ...u have exceed the allowable lengths or do not match in length order new cables Cables of different lengths can cause timing differences The total cable length from a 3803 to any 3420 must not exceed 1...

Page 173: ...Unit Code Location U R Operation Frequency Action 0 Air Filter 2 months Check cooling air fIlter for restriction of air flow Clean or replace as required 2 dc voltage 6 months Check dc voltages Adjust...

Page 174: ......

Page 175: ...s u 9046 White Covers cc 9903 208 VAC Power 9905 230 VAC Power 5310 9 TRK NRZI 6250 1600 800 co 6320 See Note 7 TRK NRZI 800 556 200 c 7850 2860 Channel Attachment 0 i 9181 First 2860 Channel c J 9182...

Page 176: ...071 2x8 2 Control Switch 1792 Communicator 1 2 9071 9071 9071 3x8 3 Control Switch 1793 Communicator 1 2 9071 9071 9071 9071 4x8 4 Control Switch 1794 Communicator 1 2 9071 9071 2 x 16 2 Control Switc...

Page 177: ...four light gray I O connectors on the left side of I O tailgate 1 x 8 Nothing will he on left side of I O tailgate 2 x 8 Check for two light and two dark I O connectors on the left side of I O tailgat...

Page 178: ...r 007 7 Track Basic None 054 Remote Channel Switch 870054 069 Force NRZI Write EB7207 079 7 9 Track Compatibility 870046 101 Character Insert single 870053 or dual density A17 Character Insert 870053...

Page 179: ...O MIS to 9TK W MIS B M2520838 9TK W O MIS to 7TK W MIS B M2520839 DD W O MIS to PE W MIS B M2520840 PE W O MIS to 7TK W MIS 8100 B M2520848 PE W O MIS to PE W MIS B M2520849 PE W MIS to PE W O MIS B M...

Page 180: ...vert COM1 to 2XB OB 5 0 9 1793 B M2521371 Convert COMI to 3XB W COMI 09 0 0 9 1794 B M2521372 Convert COMI to 4XB W COMI 11 4 0 9 9071 B M2521373 Convert COM2 to COMI 02 B 0 2 9071 B M2521374 Remove 2...

Page 181: ...95 7TK W MIS to 9 NRZI W O MIS 05 7 0 6 8100 B M2524296 7TK W O MIS to 7TK W MIS 04 1 0 9 B M2524280 DD W MIS to DD W O MIS 03 0 0 6 8100 B M2524281 7TK W O MIS to 9TK W MIS 05 7 0 6 8100 B M2524282 7...

Page 182: ......

Page 183: ...02 5 0 2 B M1766248 DC Voltage Conversion 03 9 0 2 8100 B M1767978 Install MIS W EC733814 04 1 0 9 B M1767979 Remove MIS W EC733814 03 0 0 6 5310 B M1846295 Install 9TK NRZI 00 7 0 5 B M1846297 Remove...

Page 184: ...COM2 03 5 0 9 1793 B M1846332 Convert 2X8 to 3X8 10 0 1 5 9071 B M1846333 Convert COM2 to COM1 02 8 0 2 1 93 B M1846334 Same as 1846332 but Aux Gate 08 5 1 5 1794 B M1846335 Convert 2X8 to 4X8 10 5 1...

Page 185: ...EC 734700 007 733810 E Sys logic update REAs Check for wire 01 A A2T2D09 24 22893 24 22906 to 01A A2USD13 24 22907 908 909 911 and 24 22919 008 733763C A Mechanical brackets mach Check for U shape br...

Page 186: ...nes only Check EC level of logic page Supply logic pages to AA003 machines W 0 RPQ 870054 018 733816 E REAs for emulator 145 Check for wire on 01A1 attach disable ripple at board from H3B10 to L2B05 b...

Page 187: ...skew hand Check 01A A1H2 Refer to ling capability REA card location list for card EC 24 24002 prerequis level ite to E046 028 733829 E Correct problem when Check 01A A1C2 Refer to a one bit splash oc...

Page 188: ...for EC 734247 on composite with E029 power supply logic page YF031 036 733841 E Tie down unused net to Check for tiedown resistor prevent noise from caus PIN 2520942 yellow from ing ROS errors REA A2...

Page 189: ...her problems See EC listing 045 733152 E RPQ machines only Check 01 A AI J2 Refer to Corrects LRC spacing 200 card location list for card EC bpi RPQ 870045 level 046 733843 E Lost record due to crease...

Page 190: ...latch tools installation of the 3420 called out in 3420 ECA E033 new reel latch 055 734501 E Installs a plastic insul Check for this insulator ator on top of the fan guards in the power supply 056 73...

Page 191: ...per clip in the slotted holes the ft1ter capacitors of the for the mounting of capaci 4V reg board Manda tors in the 4V power sup tory on machines W O EC ply Round mounting holes 734512 do not need E...

Page 192: ...and wire ME0704 and basic 3803 1 from A AIL3B03 to machine features A AIB4B07 073 905986 World Trade Only 074 734098 E Established level of box 3803 2 Check logic for EC for C exit 734098 or higher 07...

Page 193: ...Improve 4V regulation 3803 2 On 3803 2 lX8 on the power supply check for 16 Ohm resistor R8 PIN 2521454 on reg ulator board A2 086 736698 E MLMupdate 3803 2 and 3420 Check MLM for EC 736698 or high er...

Page 194: ...over to access rear bracket for the mounting of 20 amp CB located below of 20A circuit breaker the power sequence switches Check for a one piece bracket that encompasses the 20 amp CB 096 443802 E MLM...

Page 195: ...ons A B2E2M11 to A B2E2P08 107 448502 Established factory first None customer ship level for 3803 Model 3 The Model 3 attaches to the 31151 3125 MTA only 108 448503 E Provides MSTA ROS 1 Check for car...

Page 196: ...ncorrectable 448505 data error on a channel control check during paging or a halt 113 845987 E Logic update replace logic YF037 at PIN 2521590 for page YF037 at EC 449058 a Mod 1 YF037 at PIN with the...

Page 197: ...g the tape units IBM System 360 370 Reference Data 2401 2402 2415 3410 3411 and 3420 Magnetic Tape Units Order Number GX35 5001 for guidelines for estimating tape processing times and block capacities...

Page 198: ...magnetic tape to be used with IBM magnetic tape units IBM System 370 Reference Data Order Number GX20 18S0 for the summary of System 370 operation codes condition codes etc IBM Field Engineering Hand...

Page 199: ...74 Capstan Part Numbers 137 Capstan Test 74 Card Locations 3803 001 Microprocessor 139 Card Jumpering 121 127 Channel Interface 155 161 Characteristics Subsystem 1 Codes Type of Recording 5 Column Va...

Page 200: ...Postamble 150 152 Feature Codes 3420 99 Feature Codes 3803 175 176 Feature Identifier 3420 101 Feature Identifier 3803 Modell 177 178 Feature Installation Times 3803 Modell and 2 179 184 Forward Backw...

Page 201: ...MST Board Ordering 42 Noise in Interblock Gap 55 NRZI 3 5 7 NRZI Tape Path 101 NTF No Trouble Found Checklist Power 85 NTF Read Write 66 NTF Tape Motion 77 Online Tests OLTs 27 29 Part Numbers Common...

Page 202: ...ing 73 76 Recording Philosophy 5 8 Reel Board and Motor Part Numbers 136 Resistor Tie Up Tie Down 43 RPQ 178 ROS Patch Card 145 ROS Patches 149 152 SAGC 62 Sales Feature Codes 3420 99 Scopjng Procedur...

Page 203: ...n 51 Temporary Errors 9 53 Tie Up Tie Down Resistors 43 Tools and Test Equipment 39 43 Transfer Valve Leaking 75 Transfer Valve Leaking Part Numbers 137 Turn Around Delay 152 Unexpected Interrupt 151...

Page 204: ...will help us improve it and will be appreciated Each comment will be reviewed carefully by those responsible for the publication Thank you for your cooperation Is the level of coverage adequate Is th...

Page 205: ...rvice Planning Department 96C Building 005 Tucson Arizona 85744 Fold and Tape Please Do Not Staple _ Int rnational Business Machines Corporation Hefd Engineering Division 360 Hamilton Avenue White Pla...

Page 206: ...A S229 6 Il lllI1 1 I l I I II II I Y 1 I _ I llllll l I ll1 111111 I lllllll f11 1 11 j lll ll I llJlllll11J tl11111P111 1l ll I 1111111 III 11 t lJlJ Llllil LllllJllllll Illm mll 111 111111 ___ c o...

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