Utax P-4030 MFP, Service Manual

Page: 205 / 488

2NM/2NX/2NY/2NZ/2P0/2P6
1-4-40
7400 Developer unit non-install-
ing error
Sensor output value of 31 or
less continuously for 5 s.
Connector cable or
poor contact in the
connector Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Developer unit and drum PWB (YC3)
Drum PWB and drum connect PWB (YC1)
Drum connect PWB and connect left PWB
(YC3)
Connect left PWB and control PWB (YC2)
Toner sensor Replace the developer unit.
(See Page 1-5-30)
Connect left PWB
Replace the connect left PWB (see page 2-
2-12).
Control PWB Replace the control PWB and check for cor-
rect operation (see page 2-2-12).
7410 Drum unit type mismatch
error
The drum PWB EEPROM
does not communicate
normally.
Absence of the drum unit
is detected.
Connector cable or
poor contact in the
connector Reinsert the connector. Also check for conti-
nuity within the connector cable. If none,
replace the cable.
Drum unit and drum connect PWB (YC1)
Drum connect PWB and connect left PWB
(YC3)
Connect left PWB and control PWB (YC2)
Toner sensor Replace the drum unit.
(See Page 1-5-34)
Connect left PWB
Replace the connect left PWB (see page 2-
2-12).
Control PWB Replace the control PWB and check for cor-
rect operation (see page 2-2-12).
7800 Broken temperature sensor
wire
Input from temperature sensor
is 1019 or more continuously
for 160 ms.
Input from temperature sensor
is 930 or more continuously
for 5 s.
Temperature
sensor
1. Confirm that the wiring connector is
firmly connected and, if necessary,
connect the connector all the way in.
Temperature sensor and control PWB
(YC30)
2. If the wiring is disconnected, shorted or
grounded, replace the wiring.
3. Replace the key right PWB.
Control PWB 1. Check the control software and upgrade
to the latest, if necessary.
2. Replace the control PWB and check for
correct operation (see page 2-2-12).
Code Contents Related parts
Check procedures/
corrective measures