Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 135

Stacker Offset Operation Not Performed
Stacker Offset Operation Not Performed Troubleshooting Procedure
Step Actions and Questions
1 Manually move the Offset Assembly from one side to
the other.
Does the Offset Assembly move smoothly?
2 1. Enter Service Diagnostics and select Motors/Fans
Test.
2. Scroll to Stacker Offset Motor and press OK.
Does the Offset Assembly shift right, then return
left?
3 1. Switch the printer power OFF.
2. Remove the Inner Exit Chute Assembly (RRP 10.6,
page 6-106).
3. Disconnect P/J229 from the Stacker PWB.
4. On the disconnected plug, measure the resistance
between pins 1 and 3, pins 1 and 5, pins 2 and 4, and
between pins 2 and 6.
Does the resistance measure between 245 and
265 ohms?
Envelope Feed Clutch
Envelopes fail to feed, or feed incorrectly.
Envelope Feed Clutch Troubleshooting Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics and select Clutch Tests.
2. Scroll to Envelope Feeder and press OK.
Can you hear the clutch energize?
2 1. Switch Power Off.
2. Remove the Left Interface Cover (RRP 1.1 on
page 6-6), Left Cover (RRP 1.2 on
the Left Plate (RRP 1.11 on
3. Enter Service Diagnostics and select Clutch Tests.
4. Scroll to Envelope Feeder.
5. On the Engine Logic Board, check voltage between
P/J23 Pin 1 and frame ground.
6. Press OK.
Does the voltage pulse from 0.0 VDC to 3.3 VDC
then return to 0.0 VDC?
3-38
page 6-7), and
page 6-16).
Phaser 4400 Laser Printer Service Manual
Yes No
Go to step 2. Replace the
Offset Roller
Assembly
(RRP 10.14,
page
Replace the Go to step 3.
Engine Logic
Board (RRP
9.3 on
page 6-89).
Replace the Replace the
Stacker PWB Stacker
(RRP 10.7 Offset Motor
on (RRP 10.17,
page 6-107). page
If the
problem
persists,
replace the
Engine Logic
Board (RRP
9.3 on
page 6-89).
Yes No
Go to step 5. Go to step 2.
Go to step 4. Go to step 3.
6-114).
6-118).