Lexmark T520 Service Manual page 32

Infoprint 1120 and 1125
Error Code
940 Service LV
Power Supply
941 Controller
Code CRC
941 Controller
Font CRC
943 Controller
Font Version
944 Controller
Board Failure
945 Controller
Board Failure -
ASIC Failure
946 Controller
Board Failure -
SRAM Failure
947 PQET Error
948 PEL Clock
Error
949 Delay Line
Calibration
Failure
953 NVRAM
Failure
954 NVRAM
Failure
Action
The low voltage power supply zero crossover test failed.
• Check the LVPS for correct installation. Ensure that
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.
A 941 error can be created by a defective code overlay
card, a code upgrade, a defective IPDS or a
PRESCRIBE card. These should be checked before
replacing the controller board.
Replace the controller board.
Indicates that the controller code and FONT ROM are
incompatible.
Replace the controller board.
Replace the controller board.
Replace the controller board.
Replace the engine board.
Indicates the PEL clock check failed. Replace the engine
board.
Indicates a delay line calibration failure. Replace the
engine board.
Indicates the NVRAM chip on the engine board has
failed. Replace the engine board.
Indicates the NVRAM experienced a CRC failure.
Replace the engine board.
Diagnostic Information
2-5