Xerox Phaser 7760 Service Manual page 162

Troubleshooting Procedure
Table 2 Procedure
Step Actions and Questions
1 1. Enter Service Diagnostics Menu:
Printer Menu > Troubleshooting >
Service Tools > Printer Status Page
> hold the Up and Down buttons
simultaneously > Run Service Diag-
nostics > OK. Run the 2nd BTR
Motor test.
2. Does the Motor operate correctly?
2 1. Clean the 2nd BTR Retract Sensor.
2. Does the error still occur?
3 1. Run the Transmissive Sensor test.
2. Does the Sensor operate correctly?
4 1. Check the Transfer Roller Transmis-
sion Gears for damage.
2. Are the gears damaged?
5 1. Remove the Left-Hand Rear Mid
Cover.
2. Inspect the Left-Hand Cover Assembly
wiring harness for damage and ensure
the connectors are all properly seated.
3. Is the wiring harness damaged?
6 1. Remove the Rear Cover.
2. Reconnect power and enter Service
Diagnostics.
3. Measure the voltage at the Engine
Control Board J540B4 while running
the 2nd BTR Motor test several times.
4. Does the voltage between +5 VDC
and 0 VDC when the test running?
Status Indicator RAP's
009-342, 009-343
Yes No
Go to step 2. Go to step 5.
Go to step 3. Complete.
Go to step 4. Replace the Sen-
sor or Left Hand
Door Assembly
(REP 8.1).
Replace the Left Go to step 6.
Hand Door Assem-
bly (REP 8.1).
Replace the Left- Go to step 6.
Hand Cover Assem-
bly (REP 8.1).
Replace the Engine Replace the Trans-
Control Board fer Roller Retract
(MCU PWB) (REP Sensor.
1.2).
January 2010
Figure 1 009-342, 009-343 2nd BTR Retract Sensor
2-126
Revised
Phaser 7760 Color Laser Printer