Kyocera TASKalfa 7002i Service Manual page 1317

Step Check description
4 Checking the DF paddle
sensor
5 Replacing the DF main
PWB
C8300: Main program error / Folding unit communication error
Object: 4000-sheet finisher + Folding unit
The main program of the folding unit is faulty when turning the power on. The communication error appears
10 times continuously after finishing the folding unit firmware version reading.
Step Check description
1 Resetting the main power
2 Firmware upgrade
3 Checking the BF set switch The BF set switch is not
4 Checking the connection
5 Replacing the BF set
switch
6 Replacing the BF main
PWB
7 Replacing the DF main
PWB
Assumed cause
The DF paddle sensor is
not properly attached or
faulty.
The DF main PWB is
faulty.
Assumed cause
The operation program
does not properly operate.
The firmware is not the lat-
est version.
properly attached.
The connector is not prop-
erly connected. Or, the
wire is faulty.
The BF set switch is faulty. Execute U241 [Booklet] >
The BF main PWB is
faulty.
The DF main PWB is
faulty.
7-457
Measures
Reattach the DF paddle sen-
sor and execute U241 [Fin-
isher] > [Lead Paddle]. If the
sensor does not properly
operate, replace it.
Replace the DF main PWB.
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 BF firmware and
the DF firmware to the latest
version.
Reattach the BF set switch.
Clean the terminal of the fol-
lowing wire connectors and
reconnect the connectors. If
there is no continuity, replace
the wire. • BF main PWB -
DF main PWB
[Set]. If the BF set switch
does not properly operate,
replace it.
Replace the BF main PWB.
Replace the DF main PWB.
2WA/2NJ/2RK
Reference
Executing
U241
Detaching
and reat-
taching the
DF main
PWB
Reference
Firmware
Update
Wiring dia-
gram
Executing
U241
Detaching
and reat-
taching the
DF main
PWB