Olivetti d-COLOR P2026, Service Manual, Page: 79 / 207

Check procedures/
corrective measures
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Toner motor Y and engine PWB (YC26)
Check if the rollers and gears rotate
smoothly. If not, grease the bushes and
gears. Check for broken gears and replace if
any.
Replace the toner motor Y.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit K and Drum relay PWB
(YC6)
Drum relay PWB (YC1) and engine PWB
(YC34)
Replace the developing unit K (see page 1-
5-18).
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit C and Drum relay PWB
(YC10)
Drum relay PWB (YC1) and engine PWB
(YC34)
Replace the developing unit C (see page 1-
5-18).
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developing unit M and Drum relay PWB
(YC7)
Drum relay PWB (YC1) and engine PWB
(YC34)
Replace the developing unit M (see page 1-
5-18).
Replace the engine PWB and check for cor-
rect operation (see page 1-5-26).
Code
7004
Contents
Toner motor Y error
When the toner motor Y is
driven, the motor over-current
detection signal is detected
continuously for 50 times (5 s)
at 100 ms intervals.
Causes
Defective connec-
tor cable or poor
contact in the con-
nector.
Defective drive
transmission sys-
tem of the toner
motor Y.
Defective toner
motor Y.
Defective engine
PWB.
7401 Developing unit K non-
installing error
No density detection signal is
output from toner sensor K in
developing unit K.
Defective connec-
tor cable or poor
contact in the con-
nector.
Defective toner
sensor K.
Defective engine
PWB.
7402 Developing unit C non-
installing error
No density detection signal is
output from toner sensor C in
developing unit C.
Defective connec-
tor cable or poor
contact in the con-
nector.
Defective toner
sensor C.
Defective engine
PWB.
7403 Developing unit M non-
installing error
No density detection signal is
output from toner sensor M in
developing unit M.
Defective connec-
tor cable or poor
contact in the con-
nector.
Defective toner
sensor M.
Defective engine
PWB.
1-4-25