Xerox 7750DXF - Phaser Color Laser Printer Service Manual page 87

Troubleshooting Procedure (Continued)
Step Actions and Questions
8 1. Using a Type II Toner Vacuum, vacuum
out the belt cleaner and waste auger.
2. Is the actuating lever broken off of the
belt cleaner toner gate?
9
1. Remove the waste toner cartridge.
2. Enter service diagnostics and run the
Agitator Motor test.
3. Does the motor operate correctly?
10 1. Check the voltage at J532A16 on the
harness.
2. Is the voltage +24 VDC?
11 1. Check the voltage at J43-12 on the
harness.
2. Is the voltage +24 VDC?
12 1. Check the voltage at J532A17 on the
harness.
2. Is the voltage +24 VDC?
13 Is +24 VDC present at the low-voltage
power supply board?
14 1. Remove the accumulator belt
assembly.
2. Enter Service Diagnostics and run the
Accum Belt Motor test.
3. Does the motor turn?
Error Messages and Codes
Yes
Replace the belt
cleaner assembly.
Verify the waste
toner cartridge is
fully seated.
Complete.
Go to step 12.
Replace the
engine control
board.
Replace the
engine control
board.
Troubleshoot the
wiring between
the +24 VDC
LVPS and the
Engine Control
Board.
Diagnose and
repair the
mechanical
condition binding
the accumulator
belt assembly.
No
Go to step 9.
Go to step 10.
Go to step 11.
Go to step 13.
Replace the
waste toner
agitator motor.
See
"Troubleshooting
the Low-Voltage
Power Supplies"
on page 4-17.
Since the
accumulator belt
drive motor is a
servo motor,
there are no
voltage checks.
This failure can
be caused by 1 of
3 components.
Replace and test
in the following
order:
motor
interface
board
engine control
board
3-21