C2650: Main Backup Media Access Error - Konica Minolta Magicolor 8650 Service Manual

14. Malfunction code
14.5.25

C2650: Main backup media access error

Service EEPROM board (SV ERB)
Step
Check the connector (CN23PRCB) on
PRCB, the connector (CN1SV ERB) on SV
1 ERB, and the harness between the boards
for proper connection and correct as nec-
essary.
Change PRCB
1. Turn OFF the power switch and replace
the current PRCB with a new one.
(When using a PRCB of another
machine in service, be sure to use a
PRCB installed in the same model.)
See P.99
2. Update the PRCB firmware.
3. After completing the firmware update,
turn OFF and ON the power switch and
check to see that warm-up is started.
2
Make sure that malfunction codes other
than C2650 or improper IU/TC place-
ment is not detected.
4. When the trouble cannot be solved, rein-
stall the removed PRCB to the original
board.
NOTE
• When taking the above steps, check
whether PRCB is defective or not
without replacing the SV ERB.
Change SV ERB
1. Replace the current SV ERB with a new
one.
See P.106
2. Turn ON the power switch and check to
see that warm-up is started. (One
minute is spent to prepare the new SV
3
ERB for use. During the period, the con-
trol panel backlight stays off.)
Make sure that malfunction codes other
than C2650 or improper IU/TC place-
ment is not detected.
3. Make the specified readjustments.
See P.106
If the above actions do not solve the prob-
4
lem, contact KMBT.
322
Confidential – for internal use only, do not distribute
Relevant parts
Action
Field Service Ver. 2.0 Nov. 2007
Printer control board (PRCB)
WIRING DIAGRAM
Control signal
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Location (Electri-
cal component)
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