Rap 32 Registration Sensor; Rap 33 Mbf No Paper Sensor - Xerox DocuPrint N2025 Service Manual

RAP 32 Registration Sensor

Procedure
Open the Top Cover and extend the MBF and remove the Print Cartridge. Enter Diagnostics
and select Component Test. Scroll to Sensor Input test and press Enter. Actuate and deactuate
the Registration Sensor. The number on the LCD increments each time you press and
release the actuator.
Y N
Open the MBF Door and visually inspect the Registration Actuator. The actuator moves
freely and is in good condition (not broken or damaged).
Y N
Replace the Registration Actuator (REP 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/J18 from the Print Engine Controller
PWB. Switch the printer power on. On the Print Engine Controller PWB, measure the volt-
age between P18 pin 11 and frame ground and between P18 pin 13 and frame ground.
There is +3.3VDC between P18 pin 11 and frame ground and 3.3VDC between P18
pin 13 and frame ground.
Y N
Replace the Print Engine Controller PWB (REP 8.5).
Switch the printer power off. Reconnect P/J18 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/J18 pin 13 and frame
ground. There is +3.3VDC between P18 pin 13 and frame ground when the Registra-
tion Sensor is deactuated and 0.1VDC when actuated.
Y N
Replace the Registration Sensor (REP 4.6).
Replace the Print Engine Controller PWB (REP 8.5).
It appears that the Registration Sensor is working correctly. If a problem persists, replace the
Print Engine Controller PWB (REP 8.5).
Status Indicator Repair Analysis Procedures
RAP 32, RAP 33

RAP 33 MBF No Paper Sensor

Procedure
Open the MBF Door and remove all paper from the MBF. Enter Diagnostics and select Compo-
nent Test. Scroll to Sensor Input test and press Enter [4]. Actuate and deactuate the MBF No
Paper Sensor Actuator. The number on the LCD increments each time you press and
release the actuator.
Y N
Visually inspect the MBF No Paper Sensor Actuator. The actuator moves freely and is
in good condition (not broken or damaged).
Y N
Replace the MBF No Paper Sensor Actuator (REP 2.7).
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. 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 7 and frame ground and between P12 pin 9 and frame ground.
Both voltages are +3.28VDC.
Y N
Replace the Print Engine Controller PWB (REP 8.5).
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 9 and frame
ground. There is +3.28VDC between P12 pin 9 and frame ground when the MBF 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.
• J121-9 and J12-7
• J121-8 and J12-8
• J121-7 and J12-9
There is continuity between each of the wires.
Y N
Replace the MBF Combo Harness (PL 4.2).
Remove the MBF Assembly and disconnect P/J125 from the MBF No Paper Sensor.
Check the continuity between P/J125 and P/J121 as follows.
• J125-3 and J121-4
• J125-2 and J121-5
• J125-1 and J121-6
There is continuity between each of the wires.
Y N
Replace the MBF Combo Harness (PL 4.2).
Replace the MBF No Paper Sensor Assembly (REP 2.7).
A B
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WARNING
Initial Issue
DocuPrint N2025/N2825