9914V TAPE UNIT

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2.3 Data Control Board Description . . . . . . . . . . . . . . . . . . . . . . . . 2 - 102.3.1 Overview......... . . . . . . . . . . . . . . . . . . . . . 2 - 102.3.2 Micro-processor System . . . . . . . . . . . . . . . . . . . . . . 2 - 102.3.3 Communication with the Servo Control Board ........... 2 - 102.3.4 Unbuffered Pertee Interface . . . . . . . . . . . . . . . . . . . . 2 - 112.3.5 Mode Selection ........................... 2 - 122.4 Analogue Data Paths Board Description . . . . . . . . . . . . . . . . . . . 2 - 132.4.1 Overview... . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 132.4.2 Write Channels . . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 132.4.2.12.4.2.22.4.2.32.4.2.42.4.32.4.3.12.4.3.22.4.42.4.4.1Write Drivers & Buffers . . . . . . . . . . . . . . . . . . . . . . . 2 - 13Current Definition . . , , . . . , . . . , . . . . . . . . . , , . . . 2 - 14Write Power Control . . . . . . . , , . . . . . . , . , . . . . . , . 2 - 15Write DACs and Control Buffers , . . . . . . . . , . . . , . . . , 2 - 15Read Channels . . . . , . . . , . . . . . . , , . , , , , . , , . , 2 - 16PE/GCR Densities , , .. , , ................... 2 - 16NRZ Density . , ................. , ...... , .. 2- 18E-E Mode . . . . . . . . . . . . . . , . . . . . , . . , , , , . . . 2 - 18Calibration . . . . . . . . . . . . . . , . . . . . , . . . . . , . , . 2 - 192.5 Digital Data Paths Board, Description . , , , , , , . . , , , , , , . , . . , . 2 - 202.5.1 Overview". , , , , , , , , . , , , , , .. , , , , , , , , .. , 2 - 202.5.2 Initialisation""".,..,.,."".,.". . , , , . 2 - 202.5.3 Write Data Transfers . , . , , .. , . , ......... , , , , . 2 - 202.5.3.1 Control Strategy . . . . . , . , , . , , . . , . , , . , , . . , , , , 2 - 212.5.4 Read Data Transfers , , . , , ... , , , , , , . , , , , , , , , , 2 - 212.5.4.1 Read Control Strategy . , , . , , , , , , , ....... , , , , , 2 - 212.5.4.2 Functional Blocks ......... , , . , ...... , . , , , , , 2 - 212.5,5 Data and Strobe Signal pins . . , . . . . . . . . , . . , . . , . . 2 - 222.6 Pre-Amplifier Description ... , , , , . , , . , , . , , . , , , , , . , , .. 2 - 232.7 AC Power Supply Description , . , . . , , . , , . , , . . , . . . . , , . , , 2 - 242.7.1 Introduction, . . . . . . . . . . . . . , , . . . . . . . . . . . . . 2 - 242.7,2 Power Supply Overview ............ , ..... , , . , 2 - 242.7,3 +5V Regulation . , , . , . . . . . . . . . . . . . . . . . . . . . . 2 - 262.7.4 +12V Regulation . . . . . . . . . . . . . . . . . . . . . . . . . . 2 - 262.7.5 -12V, -6V, and -5V Regulation .......... , , ....... 2 - 262.7.6 +48V Supply ............................. 2 - 272.7.7 +24V Fan Supply ............... , .......... 2 - 272.7.8 Auxiliary Circuits . . . . . . . , . . . . . . . . . . . . . . . . . . 2 - 272.7.9 Power-Up Control . . . . . . . . . . . . . . . . . . . . . . . , . . 2 - 272.7.10 Fault Finding .......... , .... , ......... , . , 2 - 282.8 SCSI Interface Board Description . . . , . . . . . . . . . .'. . . . . . . , . 2 - 292.8.1 General. . , , . , . , , , . . . . . . . . . . . . . . , . . . , . , 2 - 292.8.2 Micro-processor Circuits ................... , .. 2 - 302.8.3 SCSI Interface ...................... , .. , , .2 - 31viii 9914 V Servicing Manual 95 125456 (Draft Issue D)
Section 3 Fault-Finding and Calibration3.1 Scope of Section 3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 -3.2 Interlock Override . . . . . . . . 3 -3.3 Fault Messages . . . . . . . . . . . . . . . . . . . 3 - 43.3.1 Power on Self-check . . . . . . . . . . . . . . . . . . . . . .. 3 - 43.3.1.1 Faulty Indicators . . . . . . . . . . . . . . . . . . . . . . . . .. 3 - 83.3.2 Voltage Rail Failure ......................... 3 - 83.3.3 Loading Indications ......................... 3 - 93.3.4 On-line Indications . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 113.3.5 Operator Diagnostic Indications . . . . . . . . . . . . . . . . . . 3 - 123.4 Fault-Finding Routines . . . . . . . . . . . . . . . . . . . . . . . . . . . . .3 - 133.4.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 133.4.1 .1 Off-line Problems . . . . . 3 - 133.4.1.2 On-line Problems . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 133.5 Possible Fault Causes/Remedies ....................... 3- 133.5.1 Introduction. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 133.5.2 Off-line Faults . . . . . . . . . . . . . .. 3 - 143.5.3 On-line Faults . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 143.6 Manual Tape Loading ............................. 3 - 243.6.1 Switching Off With Tape Laced ................... 3 - 243.6.2 Switching On With Already Tape Laced .............. 3 - 243.7 Azimuth Checking/Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 243.8 Tape Tension Checking/Setting ........................ 3 - 243.9 Tape Speed Checking ............................. 3 - 253.9.1 Average Tape Speed ........................ 3 - 253.9.2 Tape Speed Variations ....................... 3 - 25Re-calibiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3 - 26Section 4 Basic Configuration Options4.1 Configuration Bytes 01 to as - Operator Options ............... 4- 14.2 Configuration Byte 06 - Host Interface Options A . . . . . . . . . 4 - 24.34.44.5Configuration Byte 07 - Host Interface Options B . . . ...... 4- 3Configuration Byte 08 - Host Interface options C . . . . . . ....... .. 4- 4Configuration Byte 09 - Host I nterface options D . . . . . . ....... .. 4- 54.6 Conftguration Byte 10 - Conditions which set Incomplete . . . . . . . . . . 4 - 64.7 Configuration Byte 11 - Conditions Which Set Reject . . . . . . . . . . . . 4 - 74.8 Configuration Byte 12 - IBG Size . . . . . . . . . . . . . . . . . . . . . . . 4 - 84.9 Configuration Byte 13 - Miscellaneous Options A .............. 4 - 94.10 Configuration Byte 16 - Density . . . . . . . . . . . . . . . . . . . . . . . . 4 - 104.11 Configuration Byte 18 - Miscellaneous B. . . . . . . . . . . . . . . . . . . .4 - 1195 125456 (Draft Issue D) Preface & Contents ix
Page 1 and 2: 9914V TAPE UNITSERVICING MANUALDocu
Page 3 and 4: Bescheinigung des HerstellersHiermi
Page 5 and 6: INTERNAL CODE LICENSEPLEASE READ TH
Page 7: Table of ContentsSection 1 9914V Ov
Page 11 and 12: 7.2 MaIns Transformer and Switch ..
Page 13 and 14: 7.17 Pertec Cache Interface Board .
Page 15 and 16: Illustrations of Parts8.2.1 TAPE PA
Page 17 and 18: 1.9914V OverviewThis 9914V Servicin
Page 19 and 20: 1.2.3 Access, Modularity, and Tools
Page 22 and 23: 1.3 Short-Form SpecificationTape Ty
Page 24 and 25: 1.4 StreamingTo maintain streaming,
Page 26 and 27: 1.5 lor. Mains SystemsD€finition:
Page 28 and 29: c) Miscellaneous circuits:i) to acc
Page 30 and 31: !IOperator"s PanelI~Mlcroprocessor~
Page 32 and 33: ) Drive CurrentsThe processor outpu
Page 34 and 35: ) LocatingIn order to check the loc
Page 36 and 37: 2.3 Data Control Board Description2
Page 39 and 40: Signal MODEa MODE1 MODE2 MODE3Meani
Page 41 and 42: 2.4.2.3 Write Power ControlThis blo
Page 43 and 44: Under fixed gain conditions, the am
Page 45 and 46: tilE THRESI-'OLD .. . t ...........
Page 47 and 48: 2.5.3.1 Control StrategyThere are f
Page 49 and 50: 2.6 Pre-Amplifier DescriptionThis s
Page 51 and 52: SKI I! SK2CJ '---..;;.......,;----'
Page 53 and 54: 2.8.3 SCSI InterfaceThe SCSI Contro
Page 55 and 56: 3.Fault Finding3.1 Scope of Section
Page 57 and 58: Hub Sensor pcb-PLHS,ITachoI~PlAL II
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DisplayExplanationSuspect FRU* BOT
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Display Explanation Suspect FRUOKTh
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95 125456 (Draft Issue D) Fault Fin
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3.3.4 On-line IndicationsThe full l
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3.4 Fault-Finding Routines3.4.1 Int
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0lFaultl Possible causesI nvestigat
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Faultl Possible causes Investigatio
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o11Fault I Possible causes Investig
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I\.)I\.)Fault I Possible causesInve
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3.6 Manual Tape ThreadingSince the
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Re-calibration of the 98 i Li.\t ;;
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Configuration bytes 06 onwards are
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4.3 Configuration Byte 07 - Host In
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4.5 Configuration Byte 09 - Host In
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4.7 Configuration Byte 11 - Conditi
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4.9 - Configuration Byte 13 - Misce
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4.11 Configuration BytE.; '~g - Mis
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Option0102030405MeaningDNSDIS-1DNSD
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This page has no technical content4
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5.1.2 ',-ite CurrentFallaw the flow
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No. Function No. Function00 NULL PR
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Program 03NoteDescriptionILWD Line
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When run on-line, the programs expe
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Program 14DescriptionSet Block Leng
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Pro-:;r~UI 25Write, Backspace, Read
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Program 32 ~~;ce " ~IocksNotes - ;"
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i t 1 7 6 5 4 3 1 2 1 0I I I 1 I 1
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L should not be displayed with the
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EXIT Denotes the first exit point o
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Program 65Program 66DescriptionErro
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Prog"ram 69DescriptionError CodesIn
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Error Codes~: : AL f',l;:·)le cali
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Program 80Set Default NVR ValuesNot
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Program 98DescriptionError CodesCle
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6.4 Status Byte F4When an on-line d
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6.7 Status Byte F7Status byte F7 co
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· - -6.9 Status Byte F9Status byte
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6.11 Status By'"_-; ~ i ~Status byt
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6.16 Status Byte F16Bit Name Meanin
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it 7 bit 6bit 5 bit 4 bit 3 bit 2 b
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6.18 Condensed Status BytesThe 9914
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.....(J)ClWRITE ERR LOGbit 7 bit 62
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7.1.3 Electrical Servicing Equipmen
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7.2 Mains Tra.~- ad SWitchThe mains
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7.2.4.1 Wiring the AC Supply PlugWa
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7.4.4 SettingThe Servo Control perf
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Notes to Table 7.5.3:i) dual-functi
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ALLEN KEYE~ECTORSUTTONTOGGLEARf\iv)
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7.8 Tape Path Assembly7.8.1 Functio
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7.9.2 LocationThe tape cleaner is m
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7.11 rension Arm Assembly7.11.1 Fun
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The 9914V Data Central boards use E
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vi) Disconnect the IDC connectors t
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No attempt should be made to discon
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7.17.2 LocationThe PCI board is a p
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8.1 Available Spares8.1.1 Major Spa
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8.1.3 Subsidiary Spares Lisi:Parts
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\\-FIGURE 8.2.1TAPE PATH ASSEMBLY8-
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FIGURE 8.2.2 PARTS ABOVE THE TAPE P
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FIGURE 8.2.3(a) PARTS BELOW THE TAP
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FIGURE 8.2.3(b) PARTS BELOW THE TAP
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02 _____lG(3FIGURE 8.2.4 SUPPLY HUB
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\2II\0FIGURE 8.2.5 COOLING FAN ASSE
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00I~00
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--1LU---a--- 01FIGURE 8.2.7 ANALOGU
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FIGURE 8.2.8 DIGITAL DATA PATHS BOA
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FIGURE 8.2.9 DATA CONTROL BOARD8 -
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00If\.)0>
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l-ClI I",-...1\I,II1\O~\III\----FIG
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loll 'eOIl~~10-I
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FIGURE 8.2.13 OPERATOR PANEL AND SW
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o17--ljII 1011----~.....FIGURE 8.2.
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FIGURE 8.2.15 MAINS SWITCH8 - 36 99
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-----.\2~\\ ~1~IOFIGURE 8.3.1SCSI B
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16 ________15 Y! ! II I' I1 I' ,0\
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\0{1b'5 13 16FIGURE 8.3.3 DC POWER
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~-------~IFIGURE 8.4.1MAINS TRANSFO
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FIGURE 8.4.2 HUB SENSOR PCB8 - 46 9
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12II10-lWI--fl---OIFIGURE 8.4.3 AIR
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D14DFIGURE 8.4.4 AC FUSE KIT8 - 50
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o\ft~o·~)bJa:1FIGURE 8.4.5 DC FUSE
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8 - 54MOTHERBOARDFIGURE 8.4.6 95 12
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This page has no 'technical content
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