Kyocera TASKalfa 2551ci Service Manual page 379

Code Contents
ISC PWB error C
9520
Machine recovery error
9530
The machine may not be
9540
recovered or may have trou-
ble in its function with
changes of the internal data
when replacing some the
parts at the same time.
F000 Communication error
between main PWB and
operation PWB
Causes
Main PWB
ISC PWB
PWBs
Main PWB
Operation PWB Replace the operation PWB (see page 1-5-
54).
1-4-72
Check procedures/
corrective measures
1. Reinsert the connector if it its connection
is loose.
Main PWB (YC25) and ISC PWB (YC4)
2. Replace the main PWB (see page 1-5-
37).
3. Replace the ISC main PWB
4. Contact the Service Support.
1. Reattach the parts below in case of
replacing 2 or more of them at the same
time.
Affected parts : Memory, HDD, PWBs
* : Do not replace 2 or more of the parts
at the same time
* : And also, do not execute the follow-
ing works when replacing the above
parts.
Do not replace the drum unit or the
developing unit.
Do not replace the drum unit with the
one color for other one in the same
machine.
1. Turn the main power swtch off and after
5 seconds, then turn power on.
2. Check that the wirings and connetors
between the main circuit PWB and the
operation circuit PWB and between the
main circuit PWB and the HDD are
normal.
Main PWB (YC12,YC17,YC30) and
Operation PWB (YC1,YC2,YC3)
3. Check that the DDR memories in the
main circuit PWB are well conducted
and, if not, replace.
4. Execute U024 to initialize (FULL) the
HDD (see page 1-3-33).
5. Execute U021 to initialize memory. (see
page 1-3-32)
6. Replace the Main PWB.
7. Copy the log File saved in the HDD by
U964 in USB memory and contact the
service support (see page 1-3-207).
2NP-5