Yamaha GX-700 Service Manual page 40

A B
GX-700/GX-700VCD
PRINTED CIRCUIT BOARD (Foil side)
1
GX-700 P.C.B. CD (Lead Type Device)
2
3
12V
-12V
L
AGND
R
DGND
U5.5V
DSO
/CS
/CDRES
DSI
/DCLK
VSEL
AGND
AGND
4
GND
GND
+B
TX
GND
+5
5
42
6
C
FROM: MOTOR UNIT
FROM: PICK UP HEAD
(LOADING)
LIMITSW
LIMITSW
FEED-
FEED+
SPD-
SPD+
ROTARY+
ROTARY-
ADRESS SW
ADRESS SW
STOP SW
STOP SW
TU UP SW
COM
TU DOWN SW
D E
q
w
Point q (Pin59 of IC5)
V : 5V/div
DC range
0V
43
F G
GX-700 P.C.B. CD (Surface Mount Device)
Point w (Pin39 of IC11)
H : 50 nsec/div V : 2V/div H : 50 nsec/div
1 : 1 probe DC range 1 : 1 probe
0V
H