Table Of Contents - IBM 4975 02L Maintenance Information

Service check ......................... 3-55 Reinstallation ......................... 3-84
Adjustment ........................... 3-55 3452 Circuit Breaker ..................... 3-86
Removal ............................. 3-56 Removal ............................. 3-86
Reinstallation ......................... 3-56 Reinstallation ......................... 3-86
3352 Print Head Forms Guide .............. 3-59 3453 Power Supply ....................... 3-88
Adjustment ........................... 3-59 Removal ............................. 3-88
Removal ............................. 3-59 Reinstallation ......................... 3-88
Reinstallation ......................... 3-59 3454 Power Supply Board ................. 3-91
3353 Print Head Cable .................... 3-60 Removal ............................. 3-91
Removal ............................. 3-60 Reinstallation ......................... 3-91
Reinstallation ......................... 3-60
3455 AC Capacitor ...................... 3-92
Alternate Method ...................... 3-60
Removal ............................. 3-92
3354 Oil Felt ........................... 3-63 Reinstallation . . . . . . . . . . . . . . . . . . . . . . .. 3-92
Removal ............................. 3-63 3456 Power Supply Transformer ............ 3-95
Reinstallation ......................... 3-63 Removal ............................. 3-95
3355 Print Head Ribbon Shield ............. 3-64 Reinstallation ......................... 3-95
Adjustment ........................... 3-64 3457 Fan .............................. 3-96
Removal ............................. 3-64 Removal ............................. 3-96
Reinstallation ......................... 3-64 Reinstallation ......................... 3-96
3356 Print Head Ribbon Lifter .............. 3-66 3458 Resistor Assembly ................... 3-99
Adjustment ........................... 3-66 Removal ............................. 3-99
Removal ............................. 3-66 Reinstallation ......................... 3-99
Reinstallation ......................... 3-66 3501 Logic/Control Board ................ 3-100
3357 Copy Control Dial ................... 3-68 Removal ............................ 3-100
Removal ............................. 3-68 Reinstallation ........................ 3-100
Reinstallation ......................... 3-68
3502 Logic/Control Board Safety Cover ..... 3-102
3358 Print Head Retract Ramp ............. 3-69
Removal ............................ 3-102
Adjustment ........................... 3-69 Reinstallation ........................ 3-102
3359 Pivot Block and Yoke ................ 3-71 3503 Signal Cable ....................... 3-104
Removal ............................. 3-71 Model02L .......................... 3-104
Reinstallation ......................... 3-71 Removal ............................ 3-104
3360 Print Head Solenoid .................. 3-72 Reinstallation ........................ 3-104
Service Check ......................... 3-72
Model02R .......................... 3-105
Adjustment ........................... 3-72 Removal ............................ 3-105
Removal ............................. 3-74 Reinstallation ........................ 3-105
Reinstallation ......................... 3-74
3504 Print Cartridge ..................... 3-106
3401 Ribbon Drive Assembly ............... 3-76
Removal ............................ 3-106
Removal ............................. 3-76 Reinstallation ........................ 3-106
Reinstallation ......................... 3-76 Cleaning the Cartridge Contacts .......... 3-107
3402 Ribbon Drive Clutches ............... 3-77 Cleaning Connector Contacts ............ 3-108
Removal ............................. 3-77
3651 Print Quality ...................... 3-111
Reinstallation ......................... 3-77 3652 Print'Test Sample ................. 3-112
3403 Ribbon Drive Shaft .................. 3-78 3654 Test Mode ........................ 3-115
Removal ............................. 3-78 Returning the Printer to Operating Mode ... 3-115
Reinstallation ......................... 3-78
3654 Test Mode (continued) .............. 3-116
3404 Ribbon Drive Cords .................. 3-79 To operate the printer in wrap'mode: ...... 3-116
Removal ............................. 3-79 To return the printer to operating mode: 3-116
Reinstallation ......................... 3-79
3405 Ribbon Cartridge .................... 3-81
Chapter 4. Theory ....................•.... 4-1
Removal ............................. 3-81 Functional Units .......................... 4-1
Reinstallation ......................... 3-81 Power Supply .......................... 4-1
3441 Power Switch ....................... 3-82
Forms Feed Emitter ..................... 4-1
Removal ............................. 3-82 Print Emitter and Print Emitter Pickup ....... 4-1
Reinstallation ......................... 3-82 Ribbon Drive .......................... 4-2
3451 Line Filters ........................ 3-84 Print head ............................. 4-2
Removal ............................. 3-84
Print Cartridge ......................... 4-3
x SY34-0613