Sharp JX-8200, Руководство по обслуживанию

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Phenomena
Cause
positions
Cause 1
Cause 2
Remedy
Color balance trouble
Developing
unit
Too much distance between developing roller and OPC unit Toner concentration failure Insufficient development (Insufficient toner on the developing roller) Developing shutter ring failure Developing bias failure
Improper installation of OPC drum unit Developing unit positioning collar defect (deformation, attachment of foreign materials) Improper installation of developing unit Improper doctor gap Improper position of developing roller main electrode Developer defect Toner concentration sensor defect Developing shutter spring defect Developing shutter defect Developing roller rotation defect Developing bias line failure
Developing unit replacement Replace developing bias harness and connector
Drive section
Insufficient toner supply Developing shutter ring failure Power supply failure
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 Power supply 24V failure
Toner clutch replacement Replace toner motor Developing shutter clutch solenoid position adjustment Developing shutter clutch replacement Developing shutter drive gear replacement Developing roller clutch replacement Repair or replace power supply unit
OPC
drum
unit
Too much distance between developing roller and OPC unit OPC drum grounding failure
OPC unit mechanism section defect
OPC drum unit replacement
High voltage PWB
Main charger output failure Developing bias output failure (low) Transfer bias voltage failure
High voltage PWB defect OPC drum grounding line contact failure
High voltage PWB replacement Adjust OPC drum-transfer drum nip
Transfer drum section
Uneven
transfer
Transfer drum defect Dew Transfer voltage improper OPC drum-transfer drum nip failure
Transfer drum replacement
Sensor
Temperature/humidity sensor malfunction Toner concentration sensor malfunction Image density sensor malfunction
Temperature/humidity sensor defect Toner concentration sensor (developing unit) defect Image density sensor defect
Temperature/humidity sensor replacement Developing unit replacement Image density sensor replacement
PCU PWB
Print quality control data (NV-RAM) defect Sensor malfunction Load control failure Picture correction failure
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 Developing motor control circuit defect Main charger control circuit defect Transfer bias control circuit defect Developing bias control circuit defect Discharger control circuit defect
Print quality control data (NV-RAM) correction by diag PCU PWB repair, replacement
SHARP SERVICE MANUAL JX8200SM [11] TROUBLESHOOTING