Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 125

Turn Roller Clutch Assembly
Turn Roller Clutch Assembly Troubleshooting Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics and select Clutch Tests.
2. Scroll to Tray 1 Turn Roller Clutch and press OK.
Can you hear the Tray 1 Turn Roller Clutch
energize?
2 1. Remove Tray 1.
2. Check the voltage between the lower contact of the
Paper Feeder Connector and frame ground
Is the voltage +24.0 VDC?
3 1. Switch the printer power OFF.
2. Remove the Left Interface Cover (RRP 1.1 on
page 6-6), Left Cover (RRP 1.2 on
Left Plate (RRP 1.11 on
3. Switch the printer power ON.
4. On the Engine Logic Board, check the voltage
between P/J33 pin 6 and frame ground.
Is the voltage +24.0 VDC?
4 On the left side of the Paper Tray, measure the
resistance between the upper and lower contacts on
the Paper Feeder Connector.
Is there continuity between the two contacts?
5 1. Switch the printer power OFF.
2. Remove the Paper Feeder Assembly (RRP 3.1,
page 6-28).
3. Disconnect P/J64 from the Feeder PWB.
4. Measure the resistance between pins 1 and 2 on the
disconnected plug.
Is there continuity between the two pins?
6 1. Switch the printer power OFF.
2. Remove the Front Cover (RRP 1.6,
3. Enter Service Diagnostics.
4. Select Main Motor + Clutch/Sol Tests and press OK.
5. Scroll to Motor + Tray 1 Turn Roll.
6. Cheat the Front Cover Interlock Switch, then press
OK.
Do the Turn Rolls rotate smoothly without
stalling or jerking?
3-28
page 6-7), and the
page 6-16).
page 6-11).
Phaser 4400 Laser Printer Service Manual
Yes No
Go to step 6. Go to step 2.
Go to step 4. Go to step 3.
Replace the Replace the
Feeder PWB Engine Logic
(RRP 3.9 on Board (RRP
page 6-37). 9.3 on
page
Go to step 5. Replace the
Paper
Feeder
Connector
(RRP 2.5 on
page
Replace the Replace the
Feeder PWB Turn Roller
(RRP 3.9 on Clutch
page 6-37). If Assembly
the problem (PL 3.1,
persists, page
replace the
Size PWB
(RRP 3.13
on
page 6-42).
Replace the Replace the
Turn Roller Turn Roller
Clutch (RRP Assembly
3.2, (RRP 3.2).
page 6-29). If
the problem
persists,
replace the
Engine Logic
Board (RRP
9.3 on
page 6-89).
6-89).
6-26).
7-10).