2PX/2PY
1-4-20
5304 Broken cleaning lamp Y 
wire
When the cleaning lamp Y is 
driven, the lamp over-current 
detection signal is detected 
continuously for 10 times (1 s) 
at 100 ms intervals.
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.
Drum unit Y and Drum relay PWB (YC5)
Drum relay PWB (YC1) and engine PWB 
(YC34)
Defective cleaning 
lamp Y.
Replace the drum unit Y. (see page 1-5-21).
Defective engine 
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-27).
6000 Broken fuser heater wire
The detected temperature of 
fuser thermistor does not rise 
1C/1.8F after the fuser 
heater has been turned on 
continuously for 10 s in warm-
ing up.
The fuser temperature does 
not reach 100C/212F after 
the fuser heater has been 
turned on continuously for 
30 s in warming up.
The detected temperature of 
fuser thermistor does not 
reach the specified tempera-
ture (ready indication temper-
ature) after the fuser heater 
has been turned on continu-
ously for 60 s in warming up.
The detected temperature of 
fuser thermistor does not rise 
1C/1.8F after the fuser 
heater has been turned on 
continuously for 10 s during 
printing.
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.
Fuser heater and power source PWB 
(YC102)
Fuser unit and eject PWB (YC3)
Eject PWB (YC1) and engine PWB (YC19)
Deformed connec-
tor pin.
See page 1-4-21.
Defective triac. See page 1-4-21.
Fuser thermostat 
triggered.
Reinsert the fuser unit (see page 1-5-26).
Broken fuser 
heater wire.
Replace the fuser unit (see page 1-5-26).
Defective engine 
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-27).
6020 Abnormally high fuser 
thermistor temperature
The fuser thermistor detects a 
temperature higher than 
240C/464F.
By the activation of the high 
temperature error detection 
circuit (230C/446F or more) 
of fuser thermistor, the illumi-
nation of fuser heater was 
forcibly turned off and 10 s 
has elapsed.
Deformed connec-
tor pin.
See page 1-4-21.
Defective triac. See page 1-4-21.
Shorted fuser 
thermistor.
Replace the fuser unit (see page 1-5-26).
Defective engine 
PWB.
Replace the engine PWB and check for cor-
rect operation (see page 1-5-27).
Code Contents Causes
Check procedures/
corrective measures