2FB/2FC-4
1-5-29
C0640 Hard disk problem
• The hard disk cannot be accessed.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC11 on
the engine PWB and the hard disk, and the
continuity across the connector terminals.
Repair or replace if necessary.
Defective hard
disk.
Run U906 (Resetting partial operation con-
trol) to cancel partial operation control.
Run U024 (HDD formatting) without turning
the power off to initialize the hard disk.
Replace the hard disk drive and check for
correct operation if the problem is still
detected after initialization.
Defective main
PWB.
Replace the main PWB and check for cor-
rect operation.
Defective cable. Replace cable of the hard disk.
C0700 Side feeder EEPROM error (optional
side feeder)
• An error occurs in EEPROM (U4) data
read or write for the side feeder main
PWB.
Defective side
feeder main PWB.
Replace the side feeder main PWB.
C0750 Document finisher* EEPROM error
• A backup memory error is received in
serial communication data from the fin-
isher.
Defective optional
document finisher.
Replace the document finisher with another
unit and check the operation. If the operation
is normal, replace or repair the document
finisher (see the service manual for the doc-
ument finisher).
C0960 Developing unit EEPROM error Poor contact in the
connector termi-
nals.
Check the connection of connector YC5 on
the engine PWB and the developing unit,
and the continuity across the connector ter-
minals. Repair or replace if necessary.
Defective engine
PWB.
Replace the engine PWB.
Defective develop-
ing unit.
Replace the developing unit (see page 1-6-
60).
C0970 Cleaning unit EEPROM error Poor contact in the
connector termi-
nals.
Check the connection of connector YC5 on
the engine PWB and the cleaning unit, and
the continuity across the connector termi-
nals. Repair or replace if necessary.
Defective engine
PWB.
Replace the engine PWB.
Defective cleaning
unit.
Replace the cleaning unit (see page 1-6-66).
Code Contents
Remarks
Causes Check procedures/corrective measures
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