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

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154 Phaser 5400 Laser Printer Service Guide
5 “BTR -” VOLTAGE CHECK
1. Scroll to “BTR -”.
2. Measure the voltage between the left end of the BTR
shaft and frame ground.
Warning: The next step will result in very high
voltage being placed on an exposed
contact. Use all standard high voltage
safety practices and avoid getting in
close proximity of the contact or meter
probe.
3. Press [4] to read, [0] to stop.
Does the voltage measure approximately
770 ±25 VDC?
Replace the
HVPS
[RRP 8.2,
page 307 ].
Go to
Step 6.
6 +24 VDC CHECK
1. Switch printer power OFF.
2. Remove the Lower Rear Cover [RRP 1.7, page 256 ],
Duplex Assembly [RRP 9.1, page 404 ] if installed,
and the HVPS Cover [RRP 1.6, page 255 ].
3. Switch printer power ON.
4. Measure the voltage between P/J181-10 and frame
ground.
Does the voltage m24 VDC?
Replace the
HVPS
[RRP 8.2,
page 307 ].
Go to
Step 7.
7
“NO” FROM STEP 6 ABOVE
1. Switch printer power OFF.
2. Remove the Left Side Cover [RRP 1.1, page 250 ] and
the Print Engine Controller Board Cover [RRP 8.5,
page 310 ].
3. Switch printer power ON.
4. Measure the voltage between P/J18-1 on the Print
Engine Controller Board and frame ground.
Is the v24 VDC?
Check the
wires for
continuity
between
P/J181 and
P/J18.
Repair or
replace as
necessary. Go to
Step 8.
8 “NO” FROM STEP 7 ABOVE
Measure the voltage between P/J16-9 on the Print
Engine Controller Board and frame ground.
Is the v24 VDC?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Replace the
LVPS
[RRP 8.6,
page 312 ].
9 “YES” FROM STEP 4 ABOVE
1. Check the wiring connections and continuity between
the charge contact on the Right Side Guide and P186
on the HVPS.
2. Repair or replace as necessary.
Does wiring check OK?
Replace the
HVPS
[RRP 8.2,
page 307 ].
Repair or
replace wire
harness as
necessary.
Table 89 HVPS Assembly Troubleshooting Procedure (cont'd.)
Step Actions and Questions Yes No