Xerox Phaser 7700 Service Manual page 80

Error Chain /
Code Link
31 04-347 ERROR 31 Accumulator Belt HOME POSITION FAILURE
Lower the Main Release Lever and return to the upright position to reestablish electrical
connections to the belt.
Open the RH Door and defeat the interlock switch.
Look for rotation of the Accumulator Belt during the following test.
Run the "Belt Edge Learn" test.
Did the Accumulator Belt rotate?
Yes No
Remove the Accumulator Belt Assembly (RRP 35, on page 7-180).
Caution
Removing the Accumulator Belt Assembly allows ambient
light into the print cartridge area. Avoid exposing the print
cartridge drums to light.
Manually rotate the gear that drives the Accumulator Belt.
Does it move freely?
Yes No
Inspect the Accumulator Belt Cleaner Waste Auger for packed toner.
Is the area inside the auger relatively clear of toner?
Yes No
Note
Remove the Waste Toner Cartridge.
Run the "Agitator Motor Test."
Does the Waste Toner Agitator Motor rotate?
Yes No
Measure the voltage at the Engine Control Board J404B-3
(see figure page 3-47).
Does the voltage measure +24 VDC?
Yes No
Measure the voltage at the Engine Control Board J408-7
(see figure page 3-47).
Does the voltage measure +24 VDC?
Yes No
Check for +24 VDC at the supply using the "Troubleshooting
+24 VDC LVPS" procedure in the Troubleshooting Section,
Troubleshooting the 24 VDC LVPS on page 3-89
Replace the Engine Control Board (RRP 42, on page 7-190).
Repeat the "Agitator Motor" test while measuring the voltage at the
Engine Control Board J404B-4.
Does the voltage measure 0 VDC when the test is run and +24 VDC
when the test is not run?
Yes No
Replace the Engine Control Board (RRP 42, on page 7-190).
Replace the Waste Toner Agitator Motor (RRP 31, on page 7-176).
A B C D
Service Quick Reference Guide - Diagnostics, Error Codes & Messages
Front Panel Message
It is easy to spill toner in the next step.
2-57