Xerox 5400N - Phaser B/W Laser Printer, Service Quick Reference Manual

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114 Phaser 5400 Laser Printer Service Guide
RAP 40 DC Power (LVPS)
.
Table 64 DC (LVPS) Troubleshooting Procedure
Step Actions and Questions Yes No
1 1. Perform RAP 38 before starting this RAP.
2. If RAP 38 checks out OK, switch the main power OFF
and disconnect the printer power.
3. Remove the Lower Rear Cover ( RRP 1.7, page 256 ).
4. Connect printer power.
5. Switch the printer power ON.
6. Measure the voltage on the LVPS between P/ J167
pins 1 and 3.
Does the voltage match the line voltage?
Go to Step 2. Replace the
AC Input
Assembly
(RRP 8.8,
page 314 ).
2 Measure the voltage between the bottom of Fuse F101
and P/ J167 pin 3.
Does the voltage match the line voltage?
Go to Step 4. Go to
Step 3.
3 1. Switch the main power OFF.
2. Replace fuse F101.
3. Switch the main power ON.
4. Measure the voltage between the bottom of Fuse
F101 and P/ J167 pin 3.
Does the voltage match the line voltage?
Problem
Solved. Replace the
LVPS
(RRP 8.6,
page 312 ).
4 Measure the voltage between LVPS P/ J162 pin 3 and
frame ground.
Is the v24 VDC?
Go to Step 8. Go to
Step 5.
5 On the LVPS, measure the voltage between P/ J162
pin 1 and frame ground.
Is the v24 VDC?
Go to Step 6. Replace the
LVPS
(RRP 8.6,
page 312 ).
6 Check the Top Cover and the printer Upper Rear
Cover.
Are both covers properly closed and actuating
the interlock switches?
Go to Step 7. Repair or
replace the
defective
cover/
interlock
switch as
necessary.
7 Check the continuity through the interlock switches.
Do both switches exhibit continuity?
Replace if
necessary
(RRP 7.4,
page 302 /
RRP 10.9,
page 326 ).
Go to
Step 8.
8 Check the voltages listed in Table 65.
Are the voltages correct as measured?
Return to the
procedure
that sent you
here. Go to
RAP 41.