Top cover (or maintenance cover) is down and locked, and the polygon
motor is locked, but laser synchronization could not be achieved within
40 msec.
• The I/F harness of the LDB is loose, broken defective
• Polygon motor is locked
• The angle of incidence of the laser beam and photo-detector is not
correct
• Cycle the machine off/on
• Replace the I/F harness
• Replace polygon motor
• Replace laser unit
• Replace main board
SC400: Around the Drum
SC491
C5
D
Bias Leak
A bias leak has occurred for the drum charge, development charge, or
transfer charge. PWM signals are sampled at 20 msec. intervals. This SC
is issued if 10 PWM samplings within 200 msec. are abnormal.
• HVPS harness loose, broken, defective
• HVPS board defective
• AIO terminal defective
• Cycle the machine off/on
• Check all the harness connections of the HVPS
• Check spring-loaded AIO terminal installation behind the HVPS.
• Replace HVPS
SC500: Paper Feed, Transport
SC500
C6
D
Main Motor Error
Service Calls
195
Содержание M178-21
Страница 2: ......
Страница 24: ...22 ...
Страница 69: ... Front cover Left cover 1 Disconnect the fusing unit harness A 1 2 Free the harness B 2 Basic Procedures 67 ...
Страница 71: ...6 Disconnect the thermistor harness 1 7 Disconnect the exit sensor 1 Basic Procedures 69 ...
Страница 90: ...Friction Pad 1 Remove 3 screws 3 2 Release 2 tabs 2 4 Replacement and Adjustments 88 ...
Страница 103: ...Solenoid 101 ...
Страница 105: ...2 Remove the breaker switch screw A 1 3 Disconnect and remove the switch B 2 Switches 103 ...
Страница 108: ...4 Replacement and Adjustments 106 ...
Страница 117: ...Ground Plate 1 Note the correct position for the ground plate before re installation Fusing Unit 115 ...
Страница 133: ...3 On the left side slide the base of the supply plug off its mount 4 Disconnect both connectors 2 PCB 131 ...
Страница 143: ...Filling the AIO with New Toner 1 Remove the round cap of the toner supply tank with a screwdriver Refilling the AIO 141 ...
Страница 190: ...5 System Maintenance Reference 188 ...
Страница 221: ...MEMO 219 ...
Страница 222: ...MEMO 220 EN ...
Страница 224: ......
Страница 226: ...2 ...
Страница 237: ...Scan Area TWAIN Driver Flatbed Margin Width mm A Left 0 B Right 0 C Leading 0 D Trailing 0 Machine Specifications 13 ...
Страница 250: ...MEMO 26 ...
Страница 251: ...MEMO 27 ...
Страница 252: ...MEMO 28 EN ...