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SHARP SERVICE MANUAL JX8200SM [11] TROUBLESHOOTING
Display 1
During printing
During diagnostics
Section
Scanning unit
PCU PWB
Content
Optical system error
Occurrence conditions
Laser scanning trouble
Details, causes
(The laser beam scanning synchronization signal (HSYNC) is not recognized. (The signal synchronization is not
498usec.))
PCU PWB (HSYNC) signal input circuit trouble
Scanning motor trouble
The optical section cabinet is open. (The cabinet lock switch (DOP) is off.)
Remedies
Replace the scanner unit.
Repair the PCU PWB (HSYNC) signal input circuit.
Replace the PCU PWB.
Replace the cabinet lock switch.
Display 2
During printing
During diagnostics
Section
Developing section
Drive section
PCU PWB
Content
Developing motor trouble
Occurrence conditions
Developing drive system trouble (motor)
Details, causes
(The developing motor rotation lock signal (DVMLK) is not recognized.)
Developing drive system trouble
Developing motor trouble
Remedies
Replace the developing motor.
Repair the PCU PWB developing motor rotation lock signal (PMTLK) input circuit.
Repair the drive system.
Replace the PCU PWB.
Display 3
During printing
During diagnostics
Section
Scanning unit
PCU PWB
Content
Scanning motor trouble
Occurrence conditions
Scanner motor trouble
Details, causes
(The scanning motor rotation lock signal (PMTLK) is not recognized.)
Scanning motor trouble
PCU PWB PMTLK signal input circuit trouble
Remedies
Replace the scanning unit.
Repair the PCU PWB scanning motor rotation lock signal (PMTLK) input circuit.
Replace the PCU PWB.
LED
All LEDs are blink
MESSAGE
SERVICE (C1)
MESSAGE
OPTICAL ERROR
Must be 498µsec.
HSYNC
LED
All LEDs are blink
MESSAGE
SERVICE (C2)
MESSAGE
DV MOTOR ERROR
Within 10sec.
Within 2sec.
PMD
PMTLK
DVMON
DVMLK
LED
All LEDs are blink
MESSAGE
SERVICE (C3)
MESSAGE
POLY MOTOR ERROR
Within 10sec.
Within 2sec.
PMD
PMTLK
DVMON
DVMLK
11 – 3
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