Diagnostic information 2-19
5025-2xx, 4xx
929.xx Service
Toner Sensor
The printer doesn't register a transition
on the toner sensor for a set period of
time. Either the printer's toner sensor is
faulty or its print cartridge is defective.
The Servicer should follow these steps to
resolve this problem:
• Use the base sensor test in
Diagnostics Menu to inspect the toner
sensor's operation.
• If the toner sensor is operating
correctly, then the problem is the print
cartridge.
930.xx Service
LVPS Error
The LVPS did not detect zero crossing.
931.xx Service
Printhead Error
There is no first HSYNC. Go to “930.xx–935.xx—Printhead errors
service check” on page 2-25.
932.xx Service
Printhead Error
The HSYNCs are lost. Go to “930.xx–935.xx—Printhead errors
service check” on page 2-25.
933.xx Service
Printhead Error
Mirror motor is locked. No HSYNC
received.
Go to “930.xx–935.xx—Printhead errors
service check” on page 2-25.
935.xx Service
Printhead Error
Mirror motor is unable to reach
operating speed.
Go to “930.xx–935.xx—Printhead errors
service check” on page 2-25.
936.xx Service
Transport Motor
The transport motor had an initial lock
failure.
Go to “936.xx, 937.xx—Transport motor
service check” on page 2-26.
937.xx Service
Transport Motor
The transport motor lost lock. Go to “936.xx, 937.xx—Transport motor
service check” on page 2-26.
940.xx Service
LV Power Supply
A RIP to engine communication failure.
The zero crossing signal used for fuser
control in the low-voltage (LV) power
supply has failed, or the wrong low-
voltage power supply has been
installed.
Replace the low-voltage power supply.
See “Low-voltage power supply (LVPS)
assembly removal” on page 4-37.
940.0x Service
Cyan TMC Sensor
The cyan cartridge toner meter cycle
(TMC) switch error.
Go to “Toner meter sensors (Y, C, M, K)
on TMC card” on page 2-52
.
941.0x Service
Magenta TMC
Sensor
The magenta cartridge toner meter
cycle (TMC) switch error.
Go to “Toner meter sensors (Y, C, M, K)
on TMC card” on page 2-52.
942.0x Service
Yellow TMC Sensor
The yellow cartridge toner meter cycle
(TMC) switch error.
Go to “Toner meter sensors (Y, C, M, K)
on TMC card” on page 2-52.
943.0x Service
Black TMC Sensor
The black cartridge toner meter cycle
(TMC) switch error.
Go “Toner meter sensors (Y, C, M, K) on
TMC card” on page 2-52.
948.xx Service
Engine Card
The pel clock check failed. If this error message persists, replace the
controller board. See “Controller board
removal” on page 4-19.
949.xx Service
Engine Card
Delay line calibration failure If this error message persists, replace the
controller board. See “Controller board
removal” on page 4-19.
Service error messages (1xx, 9xx) (continued)
Error code Description Action
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