MX-C250 TROUBLESHOOTING 7 – 10
F2-73
Improper toner cartridge detection
(Y)
F2-74
Toner cartridge CRUM error (BK)
F2-75
Toner cartridge CRUM error (C)
F2-76
Toner cartridge CRUM error (M)
F2-77
Toner cartridge CRUM error (Y)
F3-22
Paper feed tray 2 lift operation trouble
F6-00
Controller - FAX communication
trouble
F6-04
FAX MODEM operation trouble
F6-21
Improper combination of FAX
PWB and FAX soft switch
H2-00
Thermister open trouble
(TH_UM_AD2)
Cause
An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
MFPC PWB trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
Toner cartridge (CRUM) trouble.
MFPC PWB trouble.
Connector/harness trouble.
Check & Remedy
Replace the toner cartridge.
Replace the MFPC PWB.
Connector/harness trouble.
Cause
LUD1 is not turned ON within the specified time.
C2LUD1sensor trouble
Paper feed tray 2 lift unit trouble.
MFPC PWB trouble.
Harness and connector connection trouble.
Check & Remedy
Check connection of the harness and the
connector of C2LUD.
Replace the lift-up unit.
Replace the MFPC PWB.
Trouble content
MFP - FAX communication establishment error /
Framing / Parity / Protocol error
Section
MFP
Case 1
Cause
FAX control PWB trouble.
Check
and
Remedy
Replace the FAX control PWB.
Case 2
Cause
FAX control PWB - MFPC PWB connector and
harness trouble
Check
and
Remedy
Check the connector and the harness between the
FAX control PWB and the MFPC PWB.
Case 3
Cause
FAX PWB trouble
Check
and
Remedy
Check/Replace the FAX PWB (The modem chip is
not soldered correctly)
Case 4
Cause
FAX PWB trouble
Check
and
Remedy
Check/Replace the FAX PWB (The modem chip is
not soldered correctly)
Trouble content
FAX control PWB MODEM chip operation trouble
Section
FAX
Case 1
Cause
FAX MODEM chip operation trouble.
Check
and
remedy
Replace the FAX control PWB.
Case 2
Cause
The FAX MODEM chip cannot be accessed.
Check
and
Remedy
Replace the FAX control PWB.
Trouble content
Incompatibility between the FAX PWB and the FAX
control PWB information (soft switch)
Section
MFP
Case 1
Cause
The destination of the FAX PWB installed is improper.
Check
and
Remedy
Check the destination of the FAX PWB.
Case 2
Cause
FAX PWB trouble.
Check
and
Remedy
Replace the FAX PWB.
Cause
Thermister trouble.
MFPC PWB trouble
Connection trouble of the connector and the
harness.
Fusing unit not installed.
Check & Remedy
Replace the thermister.
Replace the MFPC PWB.
Harness and connector connection trouble.