Xerox 4400DT - Phaser B/W Laser Printer Service Manual page 123

Tray Motor Assembly Checkout
Note: Tray 1 interlocks the 24 VDC supply to the Tray 1 Size PWB,
Tray 1 Feeder PWB, Tray 2 and Tray 3. Tray 2 interlocks the
24 VDC supply to the Tray 2 Size PWB, Tray 2 Feeder PWB,
and Tray 3. Tray 3 interlocks the 24 VDC supply to the Tray
3 Size PWB and the Tray 3 Feeder PWB.
Tray Motor Assembly Checkout Procedure
Step Actions and Questions
1 1. Switch the printer power OFF.
2. Remove the Paper Tray to be tested.
3. Switch the printer power ON.
4. Measure the voltage from the lower contact of the
Paper Feeder Socket to frame ground.
Is the voltage +24 VDC?
2 On the left side of the paper tray, measure the motor
winding resistance from the middle contact to the lower
contact of the Paper Feeder Connector.
Is the resistance reading between
110 - 130 ohms?
3 On the paper tray, disconnect J673 from the Paper
Feeder Connector. Measure resistance between pins 1
and 4.
Is the resistance reading between
110 - 130 ohms?
4 Check the Paper Tray for damage, contamination,
binding, misalignment or obstruction.
Are all components clean, connected properly,
aligned properly and without damage?
3-26
Yes
Go to step 2.
Go to step 4.
Replace
Paper
Feeder
Connector
(PL 2.2 on
page
Replace the
Motor
Assembly
(RRP 2.4 on
page
Phaser 4400 Laser Printer Service Manual
No
Go to DC
Power
(LVPS) on
page 3-4.
Go to step 3.
Replace the
Motor
Assembly
(RRP 2.4 on
page 6-24).
7-8).
Repair/
replace as
necessary.
6-24).