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A
B
PRINTED CIRCUIT BOARD (Foil side)
1
P.C.B. INPUT (1)
2
3
t
4
5
6
C
(Surface Mount Device)
8
5
1
4
e
Point r (Pin39 of IC8)
Point e (Pin37 of IC8)
H : 20 µsec/div
V : 2V/div
V : 2V/div
DC range
1 : 1 probe
DC range
0V
0V
D
E
7
1
8
1
8
14
9
16
8
1
9
16
8
5
1
4
4
1
5
8
Point t
r
CH1 : Collector of Q19
CH2 : Anode of D11
H : 0.5 sec/div
(This waveform is not available by pushing the power switch ON and OFF.)
CH 1
H : 50 nsec/div
1 : 1 probe
CH 2
With the POWER ON,
disconnect the A/C power
cord. Reconnect the A/C
power cord and the above
waveforms will start.
76
F
G
P. C. B. INPUT ( 2 )
(Surface Mount Device)
16
9
1
8
V : 2V/div (CH1)
V : 2V/div (CH2)
DC range
1 : 1 probe
Disconnect the
power cord from
the AC outlet.
H
GX-900
77
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