
Field Service Ver. 2.0 Jul. 2009
19. TROUBLE CODE
825
TROUBLESHOOTING
19.5.165 C8302: Cooling fan failure
19.5.166 C8401: EEPROM failure
Relevant parts
Cooling fan (FM1)
DF control board (DFCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Check the connector of FM1 for proper
connection and correct as necessary.
—
—
2
Check the fan for possible overload and
correct as necessary.
—
—
3
FM1 operation check
DFCB PJ7-1 to 3
DF-618 I-2 to 3
4
Change FM1
—
—
5
DFCB F7 conduction check
—
—
6
Change DFCB
—
—
Relevant parts
DF control board (DFCB)
Step
Action
WIRING DIAGRAM
Control signal
Location (Electri-
cal component)
1
Disconnect and then connect the power
cord. Turn OFF the main power switch, wait
for 10 sec. or more, and turn ON the main
power switch.
—
—
2
Rewrite the firmware.
—
—
3
Change DFCB
—
—
Y110571-1 Service Manual
Summary of Contents for d-color MF651
Page 1: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Page 24: ...MEASURES TO TAKE IN CASE OF AN ACCIDENT S 22 Blank Page...
Page 27: ...d Color MF651 d Color MF551 d Color MF451 Color Printer SERVICE MANUAL Code Y110571 1...
Page 1053: ...UPDATING STATUS DATE UPDATED PAGES PAGES CODE 10 2009 1ST EDITION 1053053 Y110571 1...