Xerox Phaser 7760 Service Manual page 231

010-505 Fuser Warm Up
Message is displayed, Fuser is warming up, during jam clearance when a cover is open and
the Fuser has dropped below operating temperature.
Procedure
Clear the jam. Close any covers or doors. The machine is comes to ready.
Y N
Go to 008-900 Static Jam RAP.
Return to Service Call Procedures.
Revised
Phaser 7760 Color Laser Printer
010-600 Bottom, Developer Fan Fail
The machine logic detected a failure of the Bottom Fan or the Developer Fan.
Procedure
Enter Service Diagnostics Menu: Printer Menu > Troubleshooting > Service Tools > Printer
Status Page > hold the Up and Down buttons simultaneously > Run Service Diagnostics >
OK.
Run the Fan Motors test. The Developer Fan
Y N
There is +24 VDC from J404A pin 1 to frame gnd.
Y N
Check the wires and connectors to the Developer Fan
replace the Engine Control Board (MCU PWB)
replace the I/F PWB
Check the wires and connectors to the Developer Fan
replace the Developer Fan
The Bottom Fan (PL 8.1) revolves at high speed.
Y N
There is +24 VDC from J534 pin 1 to frame gnd.
Y N
Check the wires and connectors to the Bottom Fan
replace the Engine Control Board (MCU PWB)
Check the wires and connectors to the Bottom Fan
the Bottom Fan (PL 8.1).
Perform Service Diagnostics. The display is L.
Y N
Check the fan failure wires and connectors for an open circuit
OK, replace the fans, one at a time. If this does not resolve the problem, replace the
Engine Control Board (MCU PWB)
The Fans are operating correctly. If the problem continues replace the Engine Control Board
(MCU PWB) (PL 13.1).
January 2010
2-195
(PL 9.1) revolves at high speed.
(Figure
(PL 13.1). If the problem continues
(PL 9.1).
(Figure
(PL 9.1).
(Figure
(PL 13.1).
(Figure 1). If the check is OK, replace
(Figure
(PL 13.1).
Status Indicator RAP's
010-505, 010-600
1). If the check is OK,
1). If the check is OK,
1). If the check is OK,
1). If the check is