Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 93

Load Envelope Troubleshooting Procedure (cont'd.)
Step Actions and Questions
3 Check the voltage between P/J23 Pin 3 and frame
ground.
Is the voltage 3.3 VDC with the Envelope Feeder
No Paper Sensor de-actuated, and 0.0 VDC with
the sensor actuated?
4 1. Switch the Printer power OFF and remove the
Envelope Feeder.
2. Check for continuity between J418 (Envelope
Connector Assembly) and P/J23 Pin 3 on the Engine
Logic Board.
Is there continuity between the pins?
5 1. Remove the Front Cover (RRP 1.6 on
and the Left Front Cover (RRP 1.7 on
2. Check for continuity between P/J41 Pin 5 on the
Connector PWB and P/J23 Pin 3 on the Engine Logic
Board.
Is there continuity between the pins?
2-56
Yes
Replace the
Engine Logic
Board (RRP
9.3 on
page
Replace the
Envelope
Feeder PWB
(RRP 13.3 on
page
If the problem
persists,
replace the
Envelope
Feeder No
Paper Sensor
(RRP 13.10
on
page
page 6-11) Replace the
page 6-12).
Envelope
Connector
Assembly
(RRP 4.10 on
page
Phaser 4400 Laser Printer Service Manual
No
Go to step 4.
6-89).
Go to step 5.
6-159).
6-166).
Check the
Connector
Harness
Assembly for
proper
6-56). connection
and for
defective
wires. Repair
or replace if
necessary. If
Harness is in
good
condition,
replace the
Connector
PWB (RRP
9.7 on
page 6-94).