MX-5001N SELF DIAG AND TROUBLE CODE 7 – 17
F2-72 Improper toner cartridge detection
(MAGENTA)
F2-73 Improper toner cartridge detection
(YELLOW)
F2-74 Black CRUM error
F2-75 Cyan CRUM error
F2-76 Magenta CRUM error
F2-77 Yellow CRUM error
F2-78 Registration image density sensor
trouble (Transfer belt substrate
reflection rate abnormality)
F3-12 Paper feed tray 1 lift operation trouble
F3-22 Paper feed tray 2 lift operation trouble
Trouble content
Detail PCU
Cause An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
PCU PWB trouble.
Check & Remedy Replace the toner cartridge.
Replace the PCU PWB.
Trouble content
Detail PCU
Cause An improper toner cartridge is inserted. (The main
unit detects a toner cartridge of a different
specification.)
Toner cartridge trouble.
PCU PWB trouble.
Check & Remedy Replace the toner cartridge.
Replace the PCU PWB.
Trouble content
Detail PCU
Cause Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail PCU
Cause Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail PCU
Cause Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail PCU
Cause Toner cartridge (CRUM) trouble.
PCU PWB trouble.
Connector/harness trouble.
Check & Remedy Replace the toner cartridge.
Replace the PCU PWB.
Connector/harness trouble.
Trouble content
Detail PCU
Cause Image density (registration) sensor trouble (Sensor
sensitivity adjustment trouble).
PCU PWB trouble.
Connection trouble of the connector and the
harness.
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.
Clean the image density (registration) sensor.
Clean or replace the transfer belt.
Trouble content
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.
Harness and connector connection trouble.
Check & Remedy Check connection of the harness and the connector
of LUD1.
Replace the lift-up unit.
Replace the PCU PWB.
Trouble content 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.
Harness and connector connection trouble.
Check & Remedy Check the harness and the connector of LUD2.
Replace the lift-up unit.
Replace the PCU PWB.
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