C3721: Fusing Abnormally High Temperature Detection (Heating Side); C3723: Fusing Abnormally High Temperature Detection (Pressurizing Side); C3821: Fusing Abnormally Low Temperature Detection (Heating Side); C3823: Fusing Abnormally Low Temperature Detection (Pressurizing Side)327 - Konica Minolta Magicolor 8650 Service Manual

Field Service Ver. 2.0 Nov. 2007
14.5.42

C3721: Fusing abnormally high temperature detection (heating side)

14.5.43

C3723: Fusing abnormally high temperature detection (pressurizing side)

Fusing unit
Step
Check the fusing unit for correct installation
1
(whether it is secured in position).
Check the open/close operation of the
2
upper right door.
Check the fusing unit, PRCB and DCPU for
3 proper connection and correct or change
as necessary.
4 Change fusing unit
5 Change PRCB
6 Change DCPU
14.5.44

C3821: Fusing abnormally low temperature detection (heating side)

14.5.45 C3823: Fusing abnormally low temperature detection (pressurizing side)
Fusing unit
Step
Check the fusing unit for correct installation
1
(whether it is secured in position).
Check the open/close operation of the
2
upper right door.
Check the fusing unit, PRCB and DCPU for
3 proper connection and correct or change
as necessary.
4 Change fusing unit
5 Change PRCB
6 Change DCPU
Confidential – for internal use only, do not distribute
Relevant parts
Action
Relevant parts
Action
DC power supply (DCPU)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
—
—
—
—
—
DC power supply (DCPU)
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
—
—
—
—
—
—
14. Malfunction code
Location (Electri-
cal component)
—
—
—
—
—
—
Location (Electri-
cal component)
—
—
—
—
—
—
327