Canon imageCLASS X LBP1238, Service Manual

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E744-0002-- Language file error
Detection Description The size of the language file exceeded the allowed size.
Remedy
1. Update the firmware.
E744-1001-- Version mismatch between BOOTABLE and BOOTROM
Detection Description A version mismatch between the main program and the start-up program.
Remedy 1. Update the firmware.
E744-4000-- Invalid engine connection error
Detection Description It was detected that an invalid engine was connected.
Remedy 1. Check whether a proper Engine Controller PCB (UN1) is installed.
2. Update the firmware.
3. Replace the Engine Controller PCB (UN1).
E744-5000-- Communication error between Control Panel PCB and Main Controller PCB
Detection Description Communication with the Control Panel PCB could not be established.
Remedy 1. Check the harness/connector between the Panel PCB (UN31) and the Main Controller PCB
(UN30).
2. Replace the Control Panel (including the Panel PCB (UN31)).
3. Replace the Main Controller PCB (UN30).
E744-6000-- Communication error with Wireless LAN PCB
Detection Description Communication with the Wireless LAN PCB could not be established.
Remedy 1. Turn OFF and then ON the main power.
2. Check the harness/connector between the Wireless LAN PCB (UN35) and the Main Controller
PCB (UN30).
3. Install the set of controller firmware.
4. Replace the Wireless LAN PCB (UN35).
5. Replace the Main Controller PCB (UN30).
E744-7000-- Backup microcomputer error
Detection Description An error in the microcomputer that retains fax job information of the Main Controller PCB.
Remedy 1. Update the firmware.
2. Replace the Main Controller PCB (UN30).
E766-8000-- Firmware error
Detection Description Information on digital registration could not be obtained.
Remedy 1. Install the Engine Controller firmware.
2. Install the set of controller firmware.
3. Replace the Engine Controller PCB (UN1).
E766-9000-- Scanner power state error
Detection Description Error in the power state of the Laser Scanner Unit (firmware-dependent).
Remedy
1. Update the firmware.
2. Replace the Laser Scanner Unit.
E804-0004-- Controller FAN Error
Detection Description
Remedy 1. Verify power to FAN.
2. Replace the FAN
3. Check if FAN is connected.
E806-0000-- Main Fan error
Detection Description The Main Fan fails to rotate at the specified rotation speed.
Remedy 1. Check the connection of the Main Fan (FM1).
2. Replace the Main Fan (FM1).
8. Error/Jam/Alarm
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