2KA
1-4-27
C1950 Transfer belt unit EEPROM error
No response is issued from the device in
reading/writing for 5 ms or more and this
problem is repeated five times succes-
sively.
Mismatch of reading data from two loca-
tions occurs eight times successively.
Mismatch between writing data and
reading data occurs eight times succes-
sively.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC28 on
the engine PWB and the connector of the
transfer belt unit, and the continuity across
the connector terminals. Repair or replace if
necessary.
Defective transfer
belt speed PWB
(inner transfer belt
unit).
Replace the transfer belt unit (see page 1-5-
28).
C2101 Developing motor K error
The rated speed achievement signal
does not turn to L within 2 s since devel-
oping motor K is activated.
The rated speed achievement signal is
at the H level for 1 s continuously after
developing motor K is stabilized.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC16 on
the engine PWB and the connector of the
developing motor K, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective drive
transmission sys-
tem.
Check if the rollers and gears rotate
smoothly. If not, grease the bushings and
gears. Check for broken gears and replace if
any.
Defective develop-
ing motor K.
Run maintenance item U030 and check if
the developing motor K operates when
YC16-B4 (remote signal) on the engine
PWB goes low. If not, replace the develop-
ing motor K.
Defective engine
PWB.
Run maintenance item U030 and check if
YC16-B4 (remote signal) on the engine
PWB goes low. If not, replace the engine
PWB.
C2102 Developing motor MCY error
The rated speed achievement signal
does not turn to L within 2 s since devel-
oping motor MCY is activated.
The rated speed achievement signal is
at the H level for 1 s continuously after
developing motor MCY is stabilized.
Poor contact in the
connector termi-
nals.
Check the connection of connector YC16 on
the engine PWB and the connector of the
developing motor MCY, and the continuity
across the connector terminals. Repair or
replace if necessary.
Defective drive
transmission sys-
tem.
Check if the rollers and gears rotate
smoothly. If not, grease the bushings and
gears. Check for broken gears and replace if
any.
Defective develop-
ing motor MCY.
Run maintenance item U030 and check if
the developing motor MCY operates when
YC16-A4 (remote signal) on the engine
PWB goes low. If not, replace the develop-
ing motor MCY.
Defective engine
PWB.
Run maintenance item U030 and check if
YC16-A4 (remote signal) on the engine
PWB goes low. If not, replace the engine
PWB.
Code Contents
Remarks
Causes Check procedures/corrective measures
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