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

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128 Phaser 5400 Laser Printer Service Guide
RAP 47 Main Motor Assembly
.
Table 75 Main Motor Assembly Troubleshooting Procedure
Step Actions and Questions Yes No
1
PROCEDURE
1. Open the Top Cover.
2. Remove the Print Cartridge.
3. Cheat the Top Cover Interlock.
4. Enter Diagnostics mode.
5. From the Main Menu, select Component Test / Main
Motor / press [4] to start test, [0] to stop.
Does the Main Motor rotate?
Problem
solved. Go to
Step 2.
2 LVPS VOLTAGES
1. Switch print power OFF.
2. Remove the Lower Rear Cover [RRP 1.7, page 256 ].
3. Switch printer power ON.
4. Measure the voltages listed in the table [see Table 76
below] on the LVPS.
Are all voltages correct?
Go to
Step 7. Go to
Step 3.
3 Are the voltages on pins 1 and 2 correct? Go to
Step 4. Replace the
LVPS
[RRP 8.6,
page 312 ].
4 Is the voltage on pin 6 correct? Go to
Step 5. Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
5 Is the voltage on pin 5 correct Replace the
LVPS
[RRP 8.6,
page 312 ].
Go to
Step 6.
6 “NO” FROM STEP 5 ABOVE
Check the voltage between P/J161-11 and frame
ground.
Does the voltage on P/J161-11 measure
+3.3 VDC?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Replace the
LVPS
[RRP 8.6,
page 312 ].
7 “YES” FROM STEP 2 ABOVE
1. With the Top Cover Interlock still cheated, enter
Diagnostics mode.
2. From the Main Menu, select Component Test / Main
Motor.
3. Measure the voltage between P/J164-6 and frame
ground. Note this voltage, then continue with
sub-step 4.
4. Press [4] to start test, [0] to stop.
5. Measure (again) the voltage between P/J164-6 and
frame ground.
Does the voltage drop from +4.7 VDC (measured
in sub-step 3) to 0 VDC (measured in
sub-step 5)?
Go to
Step 9. Go to
Step 8.