Sharp MX-2314N Service Manual page 273

F2-78 Registration image density
sensor trouble (Transfer belt
substrate reflection rate abnormality)
Trouble content
Detail PCU
Cause Image density (registration) sensor trouble (Sensor
sensitivity adjustment trouble).
PCU PWB trouble.
Image density (resist) sensor connector and harness
connection trouble
Image density (registration) sensor dirt.
Transfer belt dirt, scratch.
Check & Remedy Replace the image density (registration) sensor.
Replace the PCU PWB.
Check connection of the connector and the harness
of the image density (resist) sensor.
Clean the image density (registration) sensor.
Clean or replace the transfer belt.
Use SIM44-2 to perform the sensibility adjustment of
the process control sensor.
F2-91 High density process control high
voltage error (K)
Trouble content For the production process (Not occur in the market.)
Detail PCU
Cause —
Check & Remedy —
F2-92 High density process control high
voltage error (C)
Trouble content For the production process (Not occur in the market.)
Detail PCU
Cause —
Check & Remedy —
F2-93 High density process control high
voltage error (M)
Trouble content For the production process (Not occur in the market.)
Detail PCU
Cause —
Check & Remedy —
F2-94 High density process control high
voltage error (Y)
Trouble content For the production process (Not occur in the market.)
Detail PCU
Cause —
Check & Remedy —
F3-12
Trouble content
Check & Remedy
F3-22
Trouble content
Check & Remedy
F6-00
Trouble content
Section
Case 1
Case 2
Case 3
Case 4
F6-01
Trouble content
Section
Case 1
Case 2
MX3114N TROUBLESHOOTING 7 – 18
Paper feed tray 1 lift operation trouble
Detail PCU
Cause LUD1 is not turned ON within the specified time.
CLUD1 sensor trouble.
Paper feed tray 1 lift unit trouble.
PCU PWB trouble.
Sensor harness and connector connection trouble
Check connection of the harness and the connector
of LUD1.
Replace the lift-up unit.
Replace the PCU PWB.
Paper feed tray 2 lift operation trouble
LUD2 does not turn ON within the specified time.
Detail PCU
Cause LUD2 does not turn ON within the specified time.
CLUD2 sensor trouble.
Paper feed tray 2 lift unit trouble.
PCU PWB trouble.
Sensor harness and connector connection trouble
Check the harness and the connector of LUD2.
Replace the lift-up unit.
Replace the PCU PWB.
MFPC PWB - FAX communication
trouble
MFP - FAX communication establishment error /
Framing / Parity / Protocol error
MFP
Cause FAX control PWB trouble.
Check Replace the FAX control PWB.
and
Remedy
Cause FAX control PWB - MFPC PWB connector and
harness trouble
Check Check the connector and the harness between the
and FAX control PWB and the MFPC PWB.
Remedy
Cause FAX control PWB - Mother board connector and
harness trouble
Check Check the connector and the harness between the
and FAX control PWB and the mother board.
Remedy
Cause FAX control PWB ROM trouble / ROM pin breakage
Check Check the ROM of the FAX control PWB.
and
Remedy
FAX control PWB EEPROM read/write
error
FAX control PWB EEPROM access error (Read and
write)
FAX
Cause FAX control PWB EEPROM trouble
Check Check that no trouble occurs after replacement of
and EEPROM. Execute the memory check of SIM66-3 to
Remedy insure that EEPROM can be accessed.
Cause FAX control PWB EEPROM access circuit trouble
Check Replace the FAX control PWB.
and
Remedy