Xerox 4400DT - Phaser B/W Laser Printer, Service Manual, Page: 112 / 503

Phaser 4400 Laser Printer Service Manual 3-15
Main Motor Assembly
4 1. Switch the printer power OFF.
2. Reconnect all the P/Js to the LVPS.
3. Disconnect the following from the Engine Logic
Board:
■
P/J35 (Stacker PWB) (RRP 10.7 on page 6-107 )
■
P/J34 (Duplex PWB) (RRP 12.4, page 6-144 )
■
P/J33 (Size 1 PWB) (RRP 3.13 on page 6-42 )
■
P/J22 (Laser) (RRP 7.4, page 6-82 )
■
P/J21 (Laser) (RRP 7.4, page 6-82 )
■
P/J23 (Connector PWB) (RRP 9.7, page 6-94 )
■
P/J31 (Output Tray Full Sensor) (RRP 6.6,
page 6-72 )
■
P/J30 (Rear Interlock Switch) (RRP 9.10,
page 6-97 )
■
P/J25 (Print Cartridge Sensor) (RRP 7.3,
page 6-81 )
■
P/J32 (Exit Motor) (RRP 6.5, page 6-71 )
■
P/J29 (Main Motor) (RRP 8.1 on page 6-84 )
■
P/J26 (HVPS PWB) (RRP 9.6, page 6-92 )
■
P/J27 (Fuser Sensors) (RRP 6.2 on page 6-66 )
4. Switch the printer power ON and measure the
voltages listed in Step 1.
Are all voltages correct?
Go to step 5. Replace the
Engine Logic
Board (RRP
9.3 on
page 6-89 ).
5 1. Switch the printer power OFF.
2. Reconnect one of the plugs disconnect in step 4.
3. Switch the printer power ON.
4. Measure the voltages listed in Step 1.
Are all voltages correct?
Repeat the
step with the
next
disconnected
plug. Replace the
component
just
connected to
the Engine
Logic Board.
Main Motor Assembly Troubleshooting Procedure
Step Actions and Questions Yes No
1 1. Enter Service Diagnostics and select the Motors/Fan
Test.
2. Scroll to Main Motor and press OK .
Does the Main Motor rotate?
Problem
solved,
return to
Service
Flowchart
on
page 2-2 and
continue.
Go to step 2.
Power Supply Troubleshooting Procedure (cont'd.)
Step Actions and Questions Yes No