Yamaha DVX-700 Service Manual page 68

DVR-700/NS-PSW700/NS-P700
Detection for AD port: KEY0 (39 pin of sub-microprocessor IC303 of OPERATION P.C.B.)
KEY1 (41 pin of sub-microprocessor IC303 of OPERATION P.C.B.)
Key Input(A-D) Pull-Up Resistance 10 k-Ohms
Ohm
V
A/D value
KEY0 (39 pin)
Ohm
V 0 – 0.1
A/D value 0 – 14
KEY1 (41 pin)
68
0 + 680
0 – 0.2 0.2 – 0.4
0 – 8 10 – 20
— EJECT
0 + 1.2k
0.3 – 0.7
15 – 38
— —
+ 680
0.5 – 1.8
24 – 94
PLAY
+ 1.2k + 12.7k
0.8 – 1.7 1.8 – 2.7
39 – 89 90 – 141
STOP INPUT
+ 15k + 13.5k
1.9 – 3.4 3.5 – 4.0
95 – 175 176 – 206
VOLUME UP VOLUME DOWN
+ 5.3k + 2.7k
2.8 – 3.2 3.3 – 3.6
142 – 166 167 – 184
— PAUSE