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

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130 Phaser 5400 Laser Printer Service Guide
RAP 48 Laser Assembly
.
Table 77 Laser Assembly Troubleshooting Procedure
Step Actions and Questions Yes No
1
LASER SCANNER MOTOR
1. Enter Diagnostics mode.
2. From the Main Menu, select Component Test / ROS
Motor / press [4] to start, [0] to stop.
Do you hear the Laser Scanner motor spin up?
Go to
Step 5. Go to
Step 2.
2 “NO” FROM STEP 1 ABOVE
1. Switch printer power OFF.
2. Remove the Left Side Cover [RRP 1.1, page 250 ].
3. Switch printer power ON.
4. Measure the voltage between P/J11-11 on the Print
Engine Controller Board and frame ground.
Does the voltage between P/J11-11 and frame
ground m24.0 VDC?
Go to
Step 4. Go to
Step 3.
3 “NO” FROM STEP 2 ABOVE
Measure the voltage between P/J16-9 on the Print
Engine Controller Board and frame ground.
Does the voltage between P/J16-9 on the Print
Engine Controller Board and frame ground
m24.0 VDC?
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
Replace the
LVPS
[RRP 8.6,
page 312 ].
4 “YES” FROM STEP 2 ABOVE
1. Enter Diagnostics mode.
2. From the Main Menu, select Component Test / ROS
Motor.
3. Measure the voltage between P/J11-13 and frame
ground.
4. Press [4] and observe the voltmeter.
Does the voltage drop from +5.8 VDC to 0.6
VDC?
Replace the
Laser
Assembly
[RRP 7.1,
page 297 ].
Replace the
Print Engine
Controller
Board
[RRP 8.5,
page 310 ].
5 “YES” FROM STEP 1 ABOVE
1. Switch printer power OFF.
2. Remove the Left Side Cover [RRP 1.1, page 250 ].
3. Remove the Print Engine Controller Board Cover
[RRP 8.5, page 310 ].
4. Switch printer power ON.
5. Measure the voltage between P11-8 and frame
ground.
Does the voltage between P11 and frame ground
m5.0 VDC?
Go to
Step 13. Go to
Step 6.
6 “NO” FROM STEP 6 ABOVE
Measure the voltage between P/J21-4 and frame
ground.
Does the voltage between P/J21-4 and frame
ground m5.0 VDC?
Go to
Step 9. Go to
Step 7.