Kyocera TASKalfa 3050ci Service Manual page 284

Code Contents
3900 Backup memory read/write
error (ISC PWB)
Read and write data does not
match.
3910 Backup memory data error
(ISC PWB)
Data in the specified area of
the backup memory does not
match the specified values.
4001 Polygon motor K synchroni-
zation error
After polygon motor K is
driven, the ready signal does
not turn to L within 30 s.
4002 Polygon motor C synchroni-
zation error
After polygon motor C is
driven, the ready signal does
not turn to L within 30 s.
4003 Polygon motor M synchro-
nization error
After polygon motor M is
driven, the ready signal does
not turn to L within 30 s.
Causes
Defective backup Replace the ISC PWB and check for correct
memory or PWB. operation.
Defective backup Replace the ISC PWB and check for correct
memory or PWB. operation.
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Polygon motor K and LSU relay PWB (YC4)
LSU relay PWB (YC4) and engine PWB
(YC12)
Defective polygon Replace the laser scanner unit (see page 1-
motor K. 5-25).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-54).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Polygon motor C and LSU relay PWB (YC9)
LSU relay PWB (YC3) and engine PWB
(YC12)
Defective polygon Replace the laser scanner unit (see page 1-
motor C. 5-25).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-54).
Defective connec- Reinsert the connector. Also check for conti-
tor cable or poor nuity within the connector cable. If none,
contact in the con- replace the cable.
nector. Polygon motor M and LSU relay PWB (YC7)
LSU relay PWB (YC3) and engine PWB
(YC12)
Defective polygon Replace the laser scanner unit (see page 1-
motor M. 5-25).
Defective engine Replace the engine PWB and check for cor-
PWB. rect operation (see page 1-5-54).
1-4-44
2LK/2LN/2LM/2LC
Check procedures/
corrective measures