Kyocera KM-4230 Service Manual page 421

2A3/4
Self diagnostic codes
Code Contents
C001 Memory copy PCB 1 com-
munication problem
• Problems with data from
memory copy PCB 1.
C003 Memory copy PCB 2 prob-
lem* 1
• Problems with data from
memory copy PCB 2.
C010 RAM/ROM problem
• Read and write data does
not match.
C011 Backup memory data
problem
• Data in the specified area
of the backup memory
does not match the speci-
fied values.
C021 Operation unit main PCB
communication problem
• There is no reply after 20
retries at communication.
*1: 42 ppm: optional/52 ppm: standard.
3-5-2
Causes
Defective Replace memory copy PCB 1
memory copy and check for correct opera-
PCB 1. tion.
Defective Replace memory copy PCB 2
memory copy and check for correct opera-
PCB 2. tion.
Defective main Replace the main PCB and
PCB. check for correct operation.
Problem with Turn safety switch 1 off and
the backup back on and run maintenance
memory data. item U020 to set the contents
of the backup memory data
again.
Defective If the C011 is displayed after
backup RAM. re-setting the backup memory
contents, replace the backup
RAM.
Poor contact of Check the connection of con-
the connector nectors CN6 on the main PCB
terminals. and CN6 on the operation unit
main PCB, and the continuity
across the connector termi-
nals. Repair or replace if nec-
essary.
Defective main Replace the main PCB or op-
PCB or opera- eration unit main PCB and
tion unit main check for correct operation.
PCB.
Remarks
Check procedures/
corrective measures