Diagnostic information 2-3
4060-xxx
924 Fuser Error An open circuit has been detected in the Fuser Thermistor Circuit. Go to “Fuser
service checks” on page 2-52.
925 Fuser Error Wrong fuser lamp installed. Go to “Cold fuser service check” on page 2-52.
927 Fan Stalled This is an indication that a printer fan has stalled. Go to “Main fan service check”
on page 2-69.
929 Toner Sensor The toner sensor is not operating properly, the developer drive assembly is not
operating properly or the print cartridge is defective. Go to “Toner sensor service
check” on page 2-93.
930 Printhead Error The wrong printhead may be installed. If you have not replaced the system board
recently, replace the correct printhead. If the problem remains, replace the system
board. If you have recently replaced the system board and you still have a 930
error, the wrong system board may be installed. Replace the system board with
the correct system board.
931-935 Printhead Error These errors represent a problem with the printhead. Go to “Printhead service
check” on page 2-78.
932 - Printhead: Lost
Hsync
933 - Mirror Motor
Locks/Lost Hsync
934 - Mirror Motor Lost
Lock
935 - Mirror Motor
unable to reach
operating speed.
936-937 Transport
Motor
Indicates a problem with the main drive motor. Go to “Main drive service check”
on page 2-68.
936 - Main Drive Motor
initial lock failure
937 - Main Drive Motor
lost lock
940 Service LV Power
Supply
The low voltage power supply zero crossover test failed.
Check the LVPS for correct installation. Make sure the connector on the LVPS
assembly is firmly seated with the connector on the interconnect card connector.
This error may also be caused by a noisy AC input power source.
• Be sure the correct LVPS has been installed.
• If all the above are correct, replace the LVPS assembly.
948 PEL Clock Error Indicates the pel clock check failed. Replace the system board.
949 Delay Line
Calibration Failure
Indicates a delay line calibration failure. Replace the system board.
950 NVRAM
Mismatch
Go to “950 Error Code service check” on page 2-42.
951 NVRAM
Secure NVRAM Missing
Replace the system board.
953 NVRAM Chip
Failure
Indicates the NVRAM chip on the interconnect board has failed. Replace the
interconnect board.
Service error code (continued)
Error code Action
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