Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 104

DC Power Loading Troubleshooting Procedure (cont'd.)
Step Actions and Questions
5 1. Switch the printer power OFF.
2. Reconnect P/J23.
3. Switch the printer power ON.
4. Measure the voltages listed in Step 2, sub-steps 2
through 4.
Are all the voltages correct?
6 1. Switch the printer power OFF.
2. Disconnect the following from the Connector PWB:
P/J43 (Registration Sensor, Registration Clutch)
I
P/J42 (Toner Sensor)
I
P/J45 (Paper Set Sensor)
I
P/J44 (Pick Up Solenoid)
I
P/J41 (Envelope PWB)
I
3. Switch the printer power ON.
4. Measure the voltages listed in Step 2, sub-steps 2
through 4.
Are all the voltages correct?
7 1. Switch the printer power OFF.
2. Reconnect one of the disconnected plugs.
3. Switch the printer power ON.
4. Measure the voltages listed in Step 2, sub-steps 2
through 4.
Are all the voltages correct?
8 1. Switch the printer power OFF.
2. Reconnect one of the disconnected plugs.
3. Switch the printer power ON.
4. Measure the voltages listed in Step 2, sub-steps 2
through 4.
Are all the voltages correct?
9 1. Switch the printer power OFF.
2. Reconnect one of the disconnected plugs.
3. Switch the printer power ON.
4. Measure the voltages listed in Step 2, sub-steps 2
through 4.
Are all the voltages correct?
Phaser 4400 Laser Printer Service Manual
Yes No
Go to step 8. Go to step 6.
Go to step 7. Replace the
Connector
PWB.
Repeat the Replace the
step with the component
next just
disconnected connected to
plug. the
Connector
PWB.
Repeat the Replace the
step with the component
next just
disconnected connected to
plug. the Engine
Logic Board.
Repeat the Replace the
step with the component
next just
disconnected connected to
plug. the LVPS.
3-7