Printer Service Manual

4026-0XX

Diagnostic Information 2-17

Exit Sensor Service Check

Fan Service Check

FRU Action

Engine Board Disconnect the exit sensor cable from the

engine board. Check for +4.5 V dc to +5.5 V dc

at CN8-1. If incorrect, replace the engine board.

Exit Sensor Be sure the exit sensor is snapped in place and

the cable is firmly connected.

Exit Sensor

Flag

Check the flag for damage and free movement

and replace as necessary. Be sure the exit sen-

sor spring is properly installed and not discon-

nected, damaged, or missing.

Reconnect the exit sensor cable and check the

voltage at CN8-3 on the engine board as you

press the exit sensor flag. The voltage should

change as the flag is moved in and out of the

sensor.Ifincorrect,replacetheexitsensor.

Exit Sensor

Cable

Check the continuity of the cable. If incorrect,

replace the exit sensor cable.

FRU Action

Engine Board Turn the printer power off. Disconnect CN11

on the engine board. Turn the printer on and

measure the voltage between CN11-1 and

CN11-2. The voltage should read approxi-

mately +24 V dc. If incorrect, replace the

engine board.

If correct, turn the printer off and connect

CN11. Monitor the voltage between ground

and CN11-1 (FAN*) immediately as you power

on the printer. The voltage should go from +24

V dc with the fan motor off to approximately 0

V dc when the motor turns on. If incorrect,

replace the fan motor and cable assembly.

Fan Motor/

Cable

Be sure the fan is properly installed if the fan

is noisy. If correct, replace the fan motor

assembly.