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2A1/2
1-5-2 Self-diagnosis
(1) Self-diagnostic function
This unit is equipped with a self-diagnostic function. When a problem is detected, copying is disabled. "C" and a number
between 011 and 731 altenates, indicating the nature of the problem.
After removing the problem, the self-diagnostic function can be reset by turning safety switch off and back on.
(2) Self diagnostic codes
Code
Contents
C011
Backup memory data problem
• Data in the specified area of the
backup memory does not match the
specified values.
C021
Printer board* communication
problem
• There is no reply after 20 retries at
communication.
C040
DIMM* problem
• Information on DIMM cannot be read
out correctly at power-on.
C041
Bitmap problem
• There is a problem with the data or
address bus of the bitmap DRAM.
C043
DMA problem
• DMA transmission of compressed,
decompressed, rotated, relocated or
blanked-out image data does not
complete within the specified period
of time.
*: Optional.
**: Standard for 18 cpm copier/optional for 15 cpm copier.
1-5-10
Causes
Check procedures/corrective measures
Problem with the
Turn safety switch off and back on and run
backup memory
maintenance item U020 to set the contents
data.
of the backup memory data again.
Defective backup
If the C011 is displayed after re-setting the
RAM.
backup memory contents, replace the
backup RAM.
Poor contact in
Check the connection of connector CN20
the connector ter-
on the main PCB and the connector on the
minals.
printer board. Repair or replace if
necessary.
Defective main
Replace the main PCB or printer board and
PCB or printer
check for correct operation.
board.
Poor contact of
Check the insertion of the memory board**.
the memory
board**.
DIMM installed
Check if the DIMM is inserted into the
incorrectly.
socket on the memory PCB correctly.
Defective DIMM.
Replace the DIMM and check for correct
operation.
Poor contact of
Check the insertion of the memory board**.
the memory
board**.
DIMM installed
Check if the DIMM is inserted into the
incorrectly.
socket on the memory PCB correctly.
Defective DIMM.
Replace the DIMM and check for correct
operation.
Poor contact of
Check the insertion of the memory board**.
the memory
board**.
Defective main
Replace the main PCB or memory board
PCB or memory
and check for correct operation.
board.
Remarks
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