2-52
Service Manual
4069-XXX
Input Sensor Service Check
Service Tip: Run the Base Sensor Test. Check the input sensor for
proper operation. The display changes from open to closed as the
sensor flag is manually moved in and out of the sensor.
Service Tip: Run a Diagnostic Print Test in the continuous mode with
the controller board removed. A defective input sensor or circuit
causes the first copy to exit only partially through the fuser assembly.
3
LVPS
Interconnect Board
If the +42 V dc test point does not
measure approxi42 V dc,
check the voltage at CN3-18 on the
LVPS. The voltage measures
approximately
+42 V dc. If the voltage is correct,
replace the interconnect board
assembly. If the voltage is incorrect,
replace the LVPS.
4
Fuser DC Cable (Engine
Board to Fuser Board Cable)
Engine Board
Check for continuity of the DC fuser
cable that is attached between J2 on
the engine board and J1 on the fuser
control board. If the cable does not
measure continuity, replace the cable.
If the cable measures continuity,
replace the engine board.
FRU
Action
1
Input Sensor Flag
Check the input sensor flag for
damage and proper operation. If a
problem is found, repair as
necessary.
2
Engine Board
Check for approxi5 V dc at
J10-10 on the engine board. If
incorrect, replace the engine board.
FRU
Action
