Gestetner B147 Service Manual page 17

3.14 DRIVE UNIT ..........................................................................................3-76
3.14.1 REGISTRATION CLUTCH ...........................................................3-76
3.14.2 DEVELOPMENT CLUTCHES ......................................................3-76
3.14.3 DEVELOPMENT MOTOR - CMY .................................................3-77
3.14.4 DRUM DRIVE MOTOR - CMY AND DRUM DRIVE MOTOR - K .3-79
3.14.5 DEVELOPMENT DRIVE MOTOR - K...........................................3-80
3.15 TONER SUPPLY UNIT .........................................................................3-81
M Toner Supply Unit ...........................................................................3-81
C and Y Toner Supply Units ...............................................................3-85
K Toner Supply Unit............................................................................3-86
TROUBLESHOOTING
4. TROUBLESHOOTING ................................................................. 4-1
4.1 PROCESS CONTROL ERROR CONDITIONS .........................................4-1
4.1.1 DEVELOPER INITIALIZATION RESULT .........................................4-1
4.1.2 PROCESS CONTROL SELF-CHECK RESULT ...............................4-3
4.1.3 LINE POSITION ADJUSTMENT RESULT .......................................4-4
4.2 SCANNER TEST MODE ...........................................................................4-7
4.2.1 VPU TEST MODE ............................................................................4-7
SP4-907-1 VPU Test Pattern: R ..........................................................4-7
SP4-907-2 VPU Test Pattern: G ..........................................................4-7
SP4-907-3 VPU Test Pattern: B ..........................................................4-7
4.2.2 IPU TEST MODE..............................................................................4-7
SP4-904-1 Register Write/Read Check Result ....................................4-7
SP4-904-2 Image Path Check Result ..................................................4-7
4.3 SERVICE CALL CONDITIONS .................................................................4-9
4.3.1 SUMMARY .......................................................................................4-9
SC Code Classification .......................................................................4-10
4.4 SC TABLE ...............................................................................................4-11
4.5 TROUBLESHOOTING GUIDE ................................................................4-55
4.5.1 IMAGE QUALITY............................................................................4-55
Work-flow............................................................................................4-55
4.6 TROUBLESHOOTING GUIDE ................................................................4-57
4.6.1 IMAGE QUALITY............................................................................4-57
Detailed Explanation ...........................................................................4-61
Copy Image processing ......................................................................4-66
4.6.2 COLOR SHIFT ...............................................................................4-68
Adjustment Standard: Max. 150 mm..................................................4-70
How to measure the gap between color lines .....................................4-76
4.6.3 COLOR SHIFT AFTER TRANSFER UNIT REPLACEMENT .........4-78
Check the color shift level ...................................................................4-78
Fusing/ Registration Roller Speed Adjustment ...................................4-78
4.6.4 BLACK OVER PRINT .....................................................................4-81
Black Over Print Disabled ...................................................................4-81
Black Over Print Enabled....................................................................4-81
4.7 ELECTRICAL COMPONENT DEFECTS ................................................4-82
4.7.1 SENSORS ......................................................................................4-82
SM v B147/B149/B190