Phenomena
Cause
positions
Cause 1
Cause 2
Remedy
Dirt
(background
copy)
OPC
drum
unit
OPC drum charging defect (charging amount
insufficient)
Main charger dirt
OPC drum cleaning blade defect
Waste toner collection section jam
OPC drum surface dirt
Charging insufficient because of fatigue
Electrode contact failure
Main charger cleaning
OPC drum cleaner section cleaning
OPC drum unit replacement
Discharge lamp
Discharge lamp light quantity insufficient
Discharge lamp does not turn on.
Discharge lamp dirt
Discharge lamp defect
Discharge lamp cleaning
Discharge lamp replacement
High voltage
PWB
Main charger output failure (abnormally low)
Developing bias output failure (abnormally high)
High voltage PWB defect
High
voltage
PWB
replacement
Developing unit
Toner developer charging insufficient (humidity
absorption, insufficient stirring)
Overtoner
Developing unit dirt
Shutter ring failure
Doctor gap failure (too large)
Developing roller main electrode position improper
Developing shutter spring defect
Developing shutter defect
Developing unit replacement
Developing unit cleaning
Drive
section
Toner supply failure
Shutter ring 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
Toner clutch replacement
Developing shutter clutch solenoid position adjustment
Developing shutter clutch replacement
Developing shutter drive gear replacement
Developing roller clutch replacement
Charger roller
Charger roller dirt
Toner concentration sensor signal line failure
Charger roller cleaning
Sensor
Toner concentration sensor malfunction
Toner concentration sensor (developing unit) defect
Developing unit replacement
Clean or replace developing unit connector
PCU PWB
Print quality control data (NV-RAM) defect
Sensor malfunction
Load control data defect
NV-RAM data disturbance, defect, peripheral 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
Main charger control circuit defect
Developing bias control circuit defect
Discharger control circuit defect
Print quality control data (NV-RAM) repair correction
by diag
PCU PWB repair, replacement
11 – 23
SHARP SERVICE MANUAL JX8200SM [11] TROUBLESHOOTING
Содержание JX-8200
Страница 201: ...14 2 ...
Страница 202: ...14 3 ...
Страница 203: ...14 4 ...
Страница 204: ...14 5 ...