Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 133

550-Sheet Feeder Feed Clutch
The 550-Sheet Feeder is not feeding paper or not feeding paper at the correct time.
550-Sheet Feeder Feed Clutch Troubleshooting Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics and select Clutch Tests.
2. Scroll to Tray 2 Feed or Tray 3 Feed and press OK.
Can you hear the clutch energize?
2 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. Enter Service Diagnostics and select Clutch Tests.
4. Scroll to Tray 2 Feed or Tray 3 Feed and press OK.
5. Check the voltage between each of the following pins
on the Engine Logic Board and frame ground:
For Tray 2, check P/J33 pin 13
I
For Tray 3, check P/J33 pin 14
I
Is the voltage +24.0 VDC?
3 1. Remove the Sheet Feeder Drive Assembly (RRP
11.6, page
2. Disconnect P/J651 from the Feed Clutch.
3. Measure the resistance between the two pins on the
feed clutch.
Does the resistance measure 140 to 170 ohms?
4 Press the Enter key.
Does the voltage drop from +24.0 VDC to
0.0 VDC?
5 1. Remove the Sheet Feeder Drive Assembly (RRP
11.6, page
2. Check the Paper Feed Rolls for contamination and
wear.
Are the Paper Feed Rolls clean and in good
condition?
6 Check the Paper Feed Assembly for binding,
obstructions, or contamination.
Is the feed assembly clean and in good
condition?
7 If the problem persists, replace the following in order
until the problem is found:
Engine Logic Board (RRP 9.3 on
I
Feeder PWB (RRP 11.9,
I
Size PWB (RRP 11.19,
I
Paper Feed Clutch (RRP 11.10,
I
3-36
page 6-16).
6-125) for the affected feeder.
6-125) for the affected feeder.
page 6-128)
page 6-139)
page 6-7), and the
page 6-89)
page 6-129)
Phaser 4400 Laser Printer Service Manual
Yes No
Go to step 5. Go to step 2.
Go to step 4. Go to step 3.
Replace the Replace the
Feeder PWB Paper Feed
(RRP 11.9, Clutch
page 6-128). (RRP 11.10,
If the page
problem
persists,
replace the
Size PWB
(RRP 11.19,
page 6-139).
Replace the Replace the
Paper Feed Engine Logic
Clutch Board (RRP
(RRP 11.10, 9.3 on
page 6-129). page
Go to step 6. Replace the
Paper Feed
Rolls
(RRP 11.11,
page
Go to step 7. Clean, repair,
or replace as
necessary
(RRP 11.12,
page
6-129).
6-89).
6-130).
6-131).