Phenomena
Cause
positions
Cause 1
Cause 2
Remedy
Density
unevenness
OPC
drum
unit
OPC drum charging unevenness
Too much distance between developing roller and
OPC drum
Too much nip between transfer drum and OPC drum
Sectional fatigue (OPC drum defect)
OPC drum unit mechanism defect
OPC drum unit replacement
Discharge lamp
Discharge lamp light quantity unbalance
Discharge lamp dirt
Discharge lamp defect
Discharge lamp cleaning
Developing unit
Undertoner
Toner charging unevenness
Too much distance between developing roller and
OPC drum
Developing shutter ring defect
Developing insufficient (insufficient toner and
developer on developing roller)
Developing unit defect (moisture absorption of
toner/developer)
Doctor gap improper
Developing roller main electrode position improper
Developing unit positioning collar defect
Developer defect
OPC drum unit installation incomplete
Developing unit positioning collar defect (deformation,
foreign material)
Developing unit installation incomplete
Developer defect
Developing shutter spring defect
Developing shutter defect
Developing roller rotation failure
Developing bias improper
Developing unit replacement
Drive section
Toner supply insufficient
Developing shutter ring defect
Toner clutch defect (color)
Toner motor defect (black)
Developing shutter clutch solenoid position improper
Developing shutter clutch defect
Developing shutter drive gear defect
Developing roller clutch defect
Developing motor defect
Toner clutch replacement
Developing shutter clutch solenoid position adjustment
Developing shutter clutch replacement
Developing shutter drive gear replacement
Developing roller clutch replacement
Developing motor defect
Optical unit
Optical unit (mirror, lens) dirt
Optical unit cleaning
Optical unit replacement
Transfer drums
section
Transfer drum unevenness (shape, resistance)
Too much nip between transfer drum and OPC drum
Transfer drum defect (dirt, deformation)
Dew
Transfer voltage failure
Transfer drum replacement
Transfer drum holding section repair
Discharger
Discharge defect (side shift)
Discharger
defect
Discharger dirt
Discharger rail defect
Discharger cleaning
Discharger replacement
Discharger rail replacement
High voltage
PWB
Transfer bias voltage output failure
Developing bias voltage failure
High voltage PWB defect
Transfer bias electrode section contact failure
High voltage PWB replacement
Discharger bias electrode replacement
Charger
roller
Charger roller pressure failure
Lift mechanism section defect (cam, tension spring,
lift lever)
Lift clutch defect
Lift mechanism section (cam, tension spring, lift lever)
repair, replacement
Lift clutch replacement
Paper
Moisture absorption of paper
Paper replacement
Sensor
Temperature/humidity sensor malfunction
Temperature/humidity
sensor
defect
Temperature/humidity sensor replacement
Sensor
Toner concentration sensor malfunction
Toner concentration sensor (developing unit) defect
Developing unit replacement
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SHARP SERVICE MANUAL JX8200SM [11] TROUBLESHOOTING
Содержание JX-8200
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