Kyocera KM-3035 Service Manual page 197

Code
C0450 Mailbox* communication problem
• Communication errors from the com-
munication microcomputer on the
main PCB.
No communication: there is no reply
after 5 retries.
Abnormal communication: a commu-
nication error (parity or checksum er-
ror) is detected five times in succes-
sion.
C0470 Switchback unit* communication
problem
• Communication errors from the com-
munication microcomputer on the
main PCB.
No communication: there is no reply
after 5 retries.
Abnormal communication: a commu-
nication error (parity or checksum er-
ror) is detected five times in succes-
sion.
C0610 Bitmap problem
• There is a problem with the data or
address bus of the bitmap DRAM.
• The DIMM on the memory PCB does
not operate correctly.
C0630 DMA problem
• DMA transmission of compressed,
decompressed, rotated, relocated or
blanked-out image data does not
complete within the specified period
of time.
*: Optional
Contents
Causes Check procedures/corrective measures
Poor contact in Check the connection of connectors YC3
the connector ter- on the main PCB and CN1 on the mailbox
minals. main PCB, and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective main Replace the main PCB and check for cor-
PCB. rect operation.
Defective mailbox Replace the mailbox main PCB and check
main PCB. for correct operation.
Poor contact in Check the connection of connectors YC3
the connector ter- on the main PCB and the continuity across
minals. the connector terminals. Repair or replace
if necessary.
Defective main Replace the main PCB and check for cor-
PCB. rect operation.
Defective switch- Replace the switchback unit main PCB and
back unit main check for correct operation.
PCB.
Defective main Replace the main PCB and check for cor-
PCB. rect operation.
DIMM installed Check if the DIMM is inserted into the
incorrectly. socket on the main PCB correctly.
Defective DIMM. Replace the DIMM and check for correct
operation.
Defective main Replace the main PCB and check for cor-
PCB. rect operation.
2FD/2FF/2FG
Remarks
1-5-23