Panasonic FP-7718

(3) Fuser abnormal detecting circuit
Thermistor
8
9
14
D7
R58
R61
R59
R60
To AC Drive P.C.B
Abnormal temperature
detecting circuit
Standard voltage :
Approx. 1.6V
1
CN6
TA4
DT35
IC13D
5V
RA21
TA4
DT42
5V
RA21
R65
5V
R64
RA18
Q8
Q9
100
IC1
24
IC5
13
14
CN7
5V
R62
L : Fuser lamp OFF
H : Fuser lamp ON
CPU P.C.B
L
( 0V) : Fuser lamp OFF
H ( 5V) : Normal
L
( 0V) : Fuser lamp OFF
H ( 5V) : Normal
Thermistor open circuit
deceting circuit
L (Less than 0.7V) : Open circuit
H (More than 0.7V) : Normal
L (Less than 1.6V) : Abnormal temperature
H (More than 1.6V) : Normal
RA21