Sharp MX-C300F User Manual

MX-C250 TROUBLESHOOTING 7 – 7
E7-22 LSU LD deform error (M)
E7-23 LSU BD(MY) detection error / LSU LD
deform error (K)
E7-28 LSU-MFP connection error
E7-29 LSU ASIC frequency error
E7-38 Zoran chip AD adjustment error
E7-80 Flex RISC- SCU communication error
E7-91 FAX reception image data error
E7-93 Copy, image send, FAX, filing, print
image data process error
EE-EC Automatic toner density adjustment
error
(Sampling level 76 - 117/139 - 178)
EE-EL Automatic toner density adjustment
error (Overtoner)
EE-EU Automatic toner density adjustment
error (Undertoner)
F2-22 Discharge lamp trouble (K)
Cause Reduced laser power, lighting error, laser diode
trouble.
Harness and connector trouble between the LD
PWB and the LSU cnt PWB.
Check & Remedy Use SIM61-1 to check the operation of the LSU.
Check the PWB and connection of the harness in
the LSU.
Replace the LSU.
Cause Optical axis shift.
Reduced laser power, lighting error, laser diode
trouble.
Harness and connector trouble between the
LD(MY) PWB and the LSU cnt PWB.
Check & Remedy Use SIM61-1 to check the operation of the LSU.
Check the PWB and connection of the harness in
the LSU.
Replace the LSU.
Cause Communication error between the CPU in the MFP
PWB and the control ASIC.
Improper connection of the communication
connector between the MFP PWB and the LSU cnt
PWB.
Harness trouble between the MFP PWB and the
LSU cnt PWB
MFP PWB or LSU cnt PWB trouble
Check & Remedy Check connection of the connector and the
harness between the MFP PWB and the LSU cnt
PWB.
Replace the LSU PWB.
Replace the MFP PWB.
Cause Oscillation abnormality of the external oscillator
and the internal oscillating circuit used in the LSU
ASIC.
LSU ASIC abnormality on the LSUcnt PWB.
Check & Remedy Check connection of the connector and the
harness between the MFP PWB and the LSUcnt
PWB..
Replace the MFP PWB.
Replace the LSU.
Cause
The voltage on MFPC PWB is not stable
The parts on the MFPC PWB are not sol-
dered properly
Check & Remedy Replace the MFPC PWB.
Cause FlexRISC trouble
Check & Remedy Check fixation of the MFPC PWB
Replace the MFPC PWB.
Cause FAX control PWB trouble
Image data process abnormality
Flash memory contact error
Image compression data corruption
Control PWB trouble
Check & Remedy Replace the fax control PWB
Sim60-1 to check the read/write operations of the
memory
Replace the MFPC PWB
Cause Image compression data corruption
Image data process abnormality
Control PWB trouble
Check & Remedy Replace the mother board.
Sim60-1 to check the read/write operations of the
memory
Replace the MFPC PWB
Cause Toner density sensor trouble.
Developing unit trouble.
PCU PWB trouble.
Check & Remedy Replace the toner density sensor.
Replace the developing unit.
Replace the PCU PWB.
Cause Toner density sensor trouble.
Charging voltage/ developing voltage trouble, toner
density trouble, or developing unit trouble.
MFPC PWB trouble.
Check & Remedy Replace the toner density sensor.
Replace the developing unit.
Replace the MFPC PWB.
Cause Toner density sensor trouble.
Charging voltage/ developing voltage trouble, toner
density trouble, or developing unit trouble.
PCU PWB trouble.
Check & Remedy Replace the toner density sensor.
Replace the developing unit.
Replace the MFPC PWB.
Cause Contact trouble between the discharge lamp PWB
(K) and the MFPC PWB.
Discharge lamp PWB (K) trouble.
MFPC PWB trouble.
Check & Remedy Replace the discharge lamp PWB (K).
Check the harness and the connector.
Replace the MFPC PWB.

Sharp MX-C300F Specifications

General

Brand	Sharp
Model	MX-C300F
Category	All in One Printer
Language	English