January 2010
2-42
Phaser 7760 Color Laser Printer
004-348
Revised
Status Indicator RAP’s
5 1. Switch the printer power On.
2. Remove the Rear Cover.
3. Measure the voltage between the
Engine Control Interface Board and
J533A+11 (refer to section 7, I/F PWB,
MAIN Motor, LVPS T11 Plug/Jack
Locations - Figure 16) and Frame
ground.
4. Does the voltage measure between +1
to +3 VDC?
Go to step 8. Go to step 6.
6 1. Measure the voltage between the
Engine Control Interface Board and
J533A-9 and Frame ground.
2. Does the voltage measure +5 VDC?
Go to step 7. Replace in the fol-
lowing order:
1. Engine Con-
trol Interface
Board (REP
1.8)
2. Engine Con-
trol Board
(MCU PWB)
(REP 1.2)
7 1. Measure the voltage between the
Engine Control Interface Board and
J533A-10 (refer to Section 7, I/F PWB,
MAIN Motor, LVPS T11 Plug/Jack
Locations - Figure 16) and Frame
ground.
2. Does the voltage measure +5 VDC?
Replace in the fol-
lowing order:
1. Engine Con-
trol Interface
Board (REP
1.8)
2. Engine Con-
trol Board
(MCU PWB)
(REP 1.2)
The Edge Sensor is
defective, replace
the Accumulator
Belt (REP 9.15).
8 1. Remove the Accumulator Belt Assem-
bly.
2. 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 Steering
Motor test.
3. Does the Motor run?
Replace the Accu-
mulator Belt Assem-
bly (REP 9.15).
If the problem is
unresolved, replace
the Engine Control
Board (MCU PWB)
(REP 1.2).
Go to step 9.
Table 2 Procedure
Step Actions and Questions Yes No
9 1. Measure the voltage between the
Engine Control Interface Board J551-5
(refer to Section 7, I/F PWB, MAIN
Motor, LVPS T11 Plug/Jack Locations
- Figure 16) and Frame ground.
2. Is the voltage +24 VDC?
Go to step 10. Replace the follow-
ing order:
1. Engine Con-
trol Interface
Board (REP
1.8)
2. Engine Con-
trol Board
(MCU PWB)
(REP 1.2)
10 1. Measure the voltage between the
Engine Control Board J551 Pins 1, 2,
3, 4, 5 and Frame ground.
2. Is the voltage +24 VDC?
Replace in the fol-
lowing order:
1. Engine Con-
trol Interface
Board (REP
1.8)
2. Engine Con-
trol Board
(MCU PWB)
(REP 1.2)
Replace the Steer-
ing Drive Assembly
(REP 9.12).
Table 2 Procedure
Step Actions and Questions Yes No
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