Feed Clutches - Xerox Phaser 4500 Service Manual

Feed Clutches

Troubleshooting Reference
Applicable Parts
Feed Clutch
Tray 1 Harness
Tray 2 Harness
Chute Harness
HVPS/Engine Logic Board
LVPS
Troubleshooting Procedure
Steps Actions and Questions
1 Check the Chute Harness:
1. Disconnect P/J24 from the HVPS/
Engine Logic Board.
2. Test for continuity across the following
points:
J24-13 <=> J245-6
J24-12 <=> J245-7
J24-5 <=> J248-1
J24-4 <=> J248-2
Are all continuous?
2 Check the Tray 1 and Tray 2 Harnesses:
1. Remove the Feed Clutch.
2. Disconnect P/J245 (Tray 1 Harness) or
P/J248 (Tray 2 Harness).
3. Test for continuity across the following
points:
Tray 1 Harness:
P/J245-8 <=> P/J242-1
P/J245-7 <=> P/J242-2
Tray 2 Harness:
P/J248-5 <=> P/J247-1
P/J248-4 <=> P/J247-2
Are all continuous
3 Check the resistance of the Feed Clutches:
Measure the resistance between:
P/J242-1 <=> P/J242-2 (Tray 1 Feed
Clutch)
P/J247-1 <=> P/J247-2 (Tray 2 Feed
Clutch)
Does the resistance measure 172 ohms
+/-10% (at 20° C)?
General Troubleshooting
Wiring and Plug/Jack Map References
"150-Sheet Feeder, 550-Sheet Feeder, Main Fan"
on page 10-22
"Print Engine General Wiring Diagram" on
page 10-17
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Go to step 2.
Go to step 3.
Go to step 4.
No
Replace the
Chute Harness.
Replace Tray 1 or
Tray 2 Harness.
Replace Feed
Clutch Assembly.
(page 8-26,
page 8-36,
page 8-110)
4-33