Philips PD7013 Service Manual page 22

CIRCUIT DIAGRAM-KEY BOARD
S1
KEY
S2
KEY
S4
KEY
S6
KEY
K_GND
IN KEY BOARD
7-7
KD1
1N4148
S3
KEY
S5
KEY
S7
KEY
5
K0
4
K1
3
K2
2
K3
1
K_GND