Phenomena
Cause
positions
Cause 1
Cause 2
Remedy
Color
spot
Drive section
Shutter ring defect
Developing shutter clutch solenoid position improper
Developing shutter clutch defect
Developing shutter drive gear defect
Developing roller clutch defect
Developing shutter clutch solenoid position adjustment
Developing shutter clutch replacement
Developing shutter drive gear replacement
Developing roller clutch replacement
Developing roller drive gear replacement
Developing unit
Overtoner
Developing unit dirt
Developing shutter spring defect
Developing shutter defect
Developing unit seal defect
Doctor gap defect (large)
Developing roller main electrode position improper
Developer defect
Developing unit replacement
Developing unit cleaning
Developing unit replacement
Base reference toner concentration level (NV-RAM
data) correction by diag
Developing unit replacement
Sensor
Temperature/humidity sensor malfunction
Toner concentration sensor malfunction
Temperature/humidity sensor defect
Toner concentration sensor (developing unit) defect
Temperature/humidity sensor replacement
Developing unit replacement
PCU PWB
Print quality control data (NV-RAM) defect
Sensor malfunction
Load control defect
NV-RAM data disturbance, defect, peripheral circuit
defect
Temperature/humidity sensor input circuit defect
Toner concentration sensor input circuit defect
Developing shutter clutch control circuit defect
Developing roller clutch control circuit defect
Toner clutch (color) control circuit defect
Toner motor (black) control circuit defect
Transfer bias control circuit defect
Developing bias control circuit defect
Discharger control circuit defect
Main charger control circuit defect
Print picture control data (NV-RAM) correction by diag
PCU PWB repair, replacement
Picture
deformation
(friction)
Developing
unit
Contact between developer/toner (on the developing
unit) and the OPC drum
Developing roller main electrode position improper
Developing shutter spring defect
Developing shutter defect
Developing unit replacement
Developing unit cleaning
Replace developing shutter clutch spring
Drive section
Shutter ring defect
Developing shutter clutch solenoid position defect
Developing shutter clutch defect
Developing shutter drive gear defect
Developing roller clutch defect
Developing shutter clutch solenoid position adjustment
Developing shutter clutch replacement
Developing shutter drive gear replacement
Developing roller clutch replacement
Charger roller
lift drive section
Charger roller position improper (transfer drum)
Lift
clutch
defect
Lift mechanism section (cam, gear, spring) defect
Paper feed unit installing position improper
Lift clutch adjustment, replacement
Lift mechanism parts replacement (cam, gear, spring)
Paper feed unit installing position correction
Transfer
drum
Transfer drum cleaner section foreign material, paper
jam
Transfer discharger section foreign material, paper
jam
Transfer drum cleaner clutch defect
Fusing motor defect
Transfer drum cleaner section cleaning/removing
foreign material
Transfer drum cleaner unit replacement
Fusing motor replacement
Fusing
section
Fusing section paper guide (deformation, foreign
material)
Removing foreign material, paper guide repair
PCU PWB
Load control failure
Developing shutter clutch control circuit defect
Developing roller clutch control circuit defect
Lift clutch control circuit defect
Resist roller clutch control circuit defect
Cleaning clutch control circuit defect
PCU PWB repair, replacement
11 – 28
SHARP SERVICE MANUAL JX8200SM [11] TROUBLESHOOTING
Содержание JX-8200
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