A
B
C
D
E
F
G
H
1
2
3
4
5
6
GX-500/GX-500VCD
■
PRINTED CIRCUIT BOARD (Foil side)
48
49
Point
e
(Pin37 of IC8)
V : 2V/div
H : 20
µ
sec/div
DC range
1 : 1 probe
Point
r
(Pin39 of IC8)
V : 2V/div
H : 50 nsec/div
DC range
1 : 1 probe
Point
t
CH1 : Collector of Q19
CH2 : Anode of D11
H : 0.5 sec/div
DC range
1 : 1 probe
V : 2V/div (CH1)
V : 2V/div (CH2)
(This waveform is not available by pushing the power switch ON and OFF.)
CH 1
CH 2
With the POWER ON,
disconnect the A/C power
cord. Reconnect the A/C
power cord and the above
waveforms will start.
Disconnect the
power cord from
the AC outlet.
0V
0V
GX-500 P.C.B. INPUT(1) (Surface Mount Device)
36
25
1
12
48
13
37
24
16
1
33
48
32
49
17
64
80
51
1
30
100
31
81
50
1
4
8
5
7
1
8
1
9
16
8
14
1
4
8
5
1
4
8
5
e
r
t
