Kyocera TASKalfa 7002i Service Manual page 1329

C8800: Main program error (DF) / Engine - DF communication error
Object: 4000-sheet finisher
The main program is faulty when turning on the power. The Engine -DF communication error is detected 10
times continuously.
Step Check description
1 Resetting the main power
2 Firmware upgrade
3 Checking the connection
4 Replacing the DF main
PWB
5 Firmware upgrade
6 Replacing the engine PWB The engine PWB is faulty.
Assumed cause
The program does not start
up properly.
The firmware is not the lat-
est version.
The connector is not prop-
erly connected. Or, the
wire is faulty.
The DF main PWB is
faulty.
The firmware is not the lat-
est version.
7-469
Measures
Turn the power switch and
the main power switch off .
After 5s passes, turn the
main power switch and the
power switch on.
Upgrade the DP firmware to
the latest version.
Clean the terminal of the fol-
lowing wire connectors and
reinsert the connectors.
Replace the wire when it has
no continuity. • DF main PWB
- Engine PWB
Replace the DF main PWB.
Upgrade the engine firmware
to the latest version
Replace the engine PWB.
2WA/2NJ/2RK
Reference
Firmware
Update
Wiring dia-
gram
Detaching
and reat-
taching the
DF main
PWB
Firmware
Update
Detaching
and reat-
taching the
engine
PWB