2KZ/2K0
1-4-32
7614 ID sensor (Y) density error
When ID sensor 2 detected
CTD is 500 or less.
Defective ID sen-
sor.
Replace the ID sensor.
Defective PWB. Replace the engine PWB check for correct
operation (see page 1-5-31).
7620 ID sensor timing error
Color registration correction
was failed.
Defective ID sen-
sor.
Replace the ID sensor.
Defective PWB. Replace the engine PWB check for correct
operation (see page 1-5-31).
7800 Broken external thermistor
wire
The external thermistor deliv-
ers 0.3V or more.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Temperature sensor and engine PWB
(YC21)
Defective tempera-
ture sensor.
Replace the temperature sensor.
7810 Short-circuited external
thermistor wire
external thermistor delivers
3V or more.
Defective connec-
tor cable or poor
contact in the con-
nector.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Temperature sensor and engine PWB
(YC21)
Defective tempera-
ture sensor.
Replace the temperature sensor.
7901 Drum K EEPROM error
No response is issued from
the device in reading/writing
for 5 ms or more and this
problem is repeated five times
successively.
Mismatch of reading data from
two locations occurs eight
times successively.
Mismatch between writing
data and reading data occurs
eight times successively.
Poor contact in the
connector termi-
nals.
Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Drum unit (K) and drum connect PWB(YC5)
drum connect PWB and engine connect
PWB (YC4)
Engine connect PWB and engine PWB
(YC9)
Defective drum
PWB.
Replace the drum unit K (see 1-5-16).
Code Contents Causes
Check procedures/
corrective measures
Service Manual Y113010-4
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