Panasonic FP-7718

(4) Copy density sensor
6
97
60
98 5 6
5
7
CN501
VR501
VR502
PS501
(Rear side)
PS502
(Front side)
1
2
3
4
CN7
1
5V
R22
IC5
IC1
RA18
IC9
R21
Q2
2
3
4
Copy density sensor P.C.B Drum
CPU P.C.B
L (0V) : Sensor ON
H (5V) : Sensor OFF