Kyocera TASKalfa 420i Service Manual page 185

Code
C0630 DMA problem
DMA transmission of image data does
not complete within the specified period
of time.
C0640 Hard disk drive problem
The hard disk cannot be accessed.
C0650 FAX image DIMM check problem
Improper DIMM is installed.
C0800 Image processing problem
JAM05 is detected twice.
C0830 Fax control PWB flash program area
checksum error
A checksum error occurred with the pro-
gram of the fax control PWB.
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.
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.
C0920 Fax file system error
The backup data is not retained for file
system abnormality of flash memory of
the fax control PWB.
Contents
Causes Check procedures/corrective measures
Poor contact in the Check the connection the signal cable for
connector termi- CIS and the main PWB, and the continuity
nals. across the connector terminals. Repair or
replace if necessary.
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Poor contact in the Check the connection of connector YC49 on
connector termi- the main PWB and the connector on the
nals. hard disk. Repair or replace if necessary.
Defective hard Run U024 (HDD formatting) without turning
disk. 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 Replace the main PWB and check for cor-
PWB. rect operation.
DIMM installed Check if the DIMM is inserted into the socket
incorrectly. on the main PWB correctly.
DIMM of another Perform maintenance mode U671 (RECOV-
machine is ERY FAX DIMM).
installed.
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
Defective fax soft- Install the fax software.
ware.
Defective fax con- Replace the fax control PWB and verify the
trol PWB. operation.
Defective main Replace the main PWB and check for cor-
PWB. rect operation.
The battery is dis- Check visually and remedy if necessary.
connected from the
main PWB.
Poor contact in the Check the connection of connector on the
connector termi- interface PWB and the connector on the fax
nals. 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.
Defective fax con- Replace the fax control PWB and verify the
trol PWB. operation.
Remarks
2KR/2KS
1-4-27