Rap 34 Tray 1 No Paper Sensor - Xerox DocuPrint N2025 Service Manual

A B
Replace the Print Engine Controller PWB (REP 8.5).
It appears that the MBF No Paper Sensor is working correctly. If a problem persists, replace the
Print Engine Controller PWB (REP 8.5).
Initial Issue
DocuPrint N2025/N2825

RAP 34 Tray 1 No Paper Sensor

Procedure
Remove Tray 1. Enter Diagnostics and select Component Test. Scroll to Sensor Input test and
press Enter. Actuate and deactuate the Tray 1 No Paper Sensor Actuator. The number on the
LCD increments each time you press and release the actuator.
Y N
Visually inspect the Tray 1 No Paper Sensor Actuator. The actuator moves freely and is
in good condition (not broken or damaged).
Y N
Replace the Tray 1 No Paper Sensor Actuator (PL 4.2).
Switch the printer power off. Remove the Left Side Cover (REP 1.1) and the Print Engine
Controller PWB Cover (REP 8.5). Disconnect P/J12 from the Print Engine Controller
PWB. Switch the printer power on. On the Print Engine Controller PWB, measure the volt-
age between P12 pin 4 and frame ground and between P12 pin 6 and frame ground.
Both voltages are +3.28VDC.
Y N
Replace the Print Engine Controller PWB (REP 8.5).
P12 pin 10 is a +24VDC supply line, if accidently shorted to pin 9 you will destroy
the Print Engine Controller PWB.
Switch the printer power off. Reconnect P/J12 to the Print Engine Controller PWB. Enter
Diagnostics and select Component Test. Scroll to Sensor Input test and press Enter. On
the Print Engine Controller PWB, measure the voltage between P/J12 pin 6 and frame
ground. There is +3.28VDC between P12 pin 9 and frame ground when the Tray 1 No
Paper Sensor is deactuated and 0.0VDC when actuated.
Y N
Switch the printer power off. Disconnect P/J121 from the MBF Assembly and P/J12
from the Print Engine Controller PWB. Check the continuity between P/J121 and P/
J12 as follows.
• J121-12 and J12-4
• J121-11 and J12-5
• J121-10 and J12-6
There is continuity between each of the wires.
Y N
Replace the MBF Harness Assembly (PL 4.2).
Remove the MBF Assembly and disconnect P/J126 from the MBF No Paper Sensor.
Check the continuity between P/J126 and P/J121 as follows.
• J126-3 and J121-1
• J126-2 and J121-2
• J126-1 and J121-3
There is continuity between each of the wires.
Y N
Replace the MBF Combo Harness (PL 4.2).
Replace the Tray 1 No Paper Sensor Assembly (REP 2.7).
A B
02/2000
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WARNING
Status Indicator Repair Analysis Procedures
RAP 33, RAP 34