5 V Interlock, Interlock Switch Assembly - Xerox Phaser 4500 Service Manual

5 V Interlock, Interlock Switch Assembly

Phaser 4500/4510 Service Manual
Troubleshooting Reference
Applicable Parts
5 V Interlock
Interlock switch assembly
Laser unit harness assembly
LVPS harness assembly
LVPS
HVPS/engine logic board
Troubleshooting Procedure
Steps Actions and Questions
Check the 5 V Interlock:
1
1. Disconnect P/J142.
2. Test for continuity across P/J142-1 <=>
P/J142-2 while manually operating the
switch.
Is the switch continuous when pushed and
open when released?
2 Check the interlock switch assembly
1. Disconnect P/J144.
2. Test for continuity across P/J144-1 <=>
P/J144-2 while manually operating the
Laser Interlock.
Is the switch continuous when pushed and
open when released?
3 Check the LVPS harness assembly
1. Disconnect P/J141, P/J142 and P/J144
of LVPS harness assembly.
2. Test for continuity across the following
points:
J141-2 <=> P142-1
J141-1 <=> P144-2
J142-2 <=> P144-1
Are all continuous?
Check the laser unit harness assembly:
4
1. Disconnect P/J141, P/J14 and P/J140 of
the laser unit harness assembly.
2. Test for continuity across the following
points:
P141-1 <=> J14-1
P141-2 <=> P140-8
Are both continuous?
General Troubleshooting
Wiring and Plug/Jack Map References
"Laser Unit, 5 V Interlock, Interlock Switch
Assembly" on page 10-29
"Print Engine Wiring Diagrams" on page 10-19
"Print Engine Plug/Jack Locator" on page 10-3
Yes
Go to step 2.
Go to step 3.
Go to step 4.
Go to "LVPS
(Low Voltage
Power
Supply)" on
page 4-4.
No
Replace the 5
V Interlock
(page 8-40).
Replace the
interlock
switch
assembly
(page 8-12).
Replace the
LVPS harness
assembly.
Replace the
laser unit
harness
assembly.
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