Xerox Phaser 7760 Service Manual page 74

Figure 1 004-345 MCU/HVPS Communication
Status Indicator RAP's
004-345, 004-561, 004-346, 004-347
004-346, 004-347 Accumulator Belt Home Position Fail Too
Long or Out of Position
The IBT Home Sensor does not detect the Belt Home signal or does not sense the Transfer
Belt edge in the correct position. This procedure can be used for troubleshooting Chain Link
code 004-346 or 004-347.
NOTE: If this failure reoccurs three times successively, an Engine NVRAM value is set prevent-
ing further printer use until the
Troubleshooting References
Applicable Parts Parts List Wiring and Plug/Jack References
Belt Cleaner PL 5.3
Accumulator Belt PL 5.2
Waste Toner PL 4.1
Auger Assembly PL 5.2
I/F PWB PL 9.1
Engine Control Board PL 13.1
(MCU PWB)
Troubleshooting Procedure
If the Accumulator Belt is damaged, determine the cause of the damage before installing a new
assembly.
• Visually inspect the Accumulator Belt area inside the printer and inside the Left-Hand
Door for foreign objects or damaged parts.
• Inspect the belt steering mechanism to determine if it is operable.
• It may be necessary to query the user for additional information as to likely causes.
Step Actions and Questions
1 Have the Accumulator Belt shipping
restrains been completely removed?
January 2010
2-38
Clear Tech Rep Faults (Section 6) is performed.
Table 1 References
Section 7, IBT Belt Assembly Plug/Jack Locations -
Figure 11
Section 7, I/F PWB, Main Motor, LVPS T11 Plug/Jack
Locations - Figure 16
Section 7, Engine Control Board (MCU PWB) Plug/
Jack Locations - Figure 15
CAUTION
Table 2 Procedure
Yes
Go to step 2.
Phaser 7760 Color Laser Printer
No
Remove the
restraints.
Revised