Kyocera TASKalfa 420i, Service Manual

Page: 185 / 508

2KR/2KS
1-4-27
C0630 DMA problem
DMA transmission of image data does
not complete within the specified period
of time.
Poor contact in the
connector termi-
nals. Check the connection the signal cable for
CIS and the main PWB, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective main
PWB. Replace the main PWB and check for cor-
rect operation.
C0640 Hard disk drive problem
The hard disk cannot be accessed.
Poor contact in the
connector termi-
nals. Check the connection of connector YC49 on
the main PWB and the connector on the
hard disk. Repair or replace if necessary.
Defective hard
disk. 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.
C0650 FAX image DIMM check problem
Improper DIMM is installed.
DIMM installed
incorrectly. Check if the DIMM is inserted into the socket
on the main PWB correctly.
DIMM of another
machine is
installed. Perform maintenance mode U671 (RECOV-
ERY FAX DIMM).
Defective main
PWB. Replace the main PWB and check for cor-
rect operation.
C0800 Image processing problem
JAM05 is detected twice.
Defective main
PWB. Replace the main PWB and check for cor-
rect operation.
C0830 Fax control PWB flash program area
checksum error
A checksum error occurred with the pro-
gram of the fax control PWB.
Defective fax soft-
ware. Install the fax software.
Defective fax con-
trol PWB. Replace the fax control PWB and verify the
operation.
C0840 Faults of RTC
The time is judged to go back based on
the comparison of the RTC time and the
current time or five years or more have
passed.
Defective main
PWB. Replace the main PWB and check for cor-
rect operation.
The battery is dis-
connected from the
main PWB. Check visually and remedy if necessary.
C0870 Fax control PWB to main PWB high
capacity data transfer problem
High-capacity data transfer between the
fax control PWB and the scanner MIP
PWB was not normally performed even if
the data transfer was retried 10 times.
Poor contact in the
connector termi-
nals. Check the connection of connector on the
interface PWB and the connector on the fax
control PWB, and the continuity across the
connector terminals. Repair or replace if
necessary.
Defective PWB. Replace the fax control PWB or main PWB
and check for correct operation.
C0920 Fax file system error
The backup data is not retained for file
system abnormality of flash memory of
the fax control PWB.
Defective fax con-
trol PWB. Replace the fax control PWB and verify the
operation.
Code Contents
Remarks
Causes Check procedures/corrective measures