A
B
C
D
E
F
G
H
1
2
3
4
5
6
GX-900
■
PRINTED CIRCUIT BOARD (Foil side)
70
71
CIRCUIT CHANGES BY MARKET.
U, C, R, T, L, A
B, G
J
X3
X
X
O
X4
X
O
X
IC3
X
X
O
IC4
X
O
X
Q4
X
X
O
D6 ~ 8, 10
X
X
O
L7 ~ 9
X
O
X
C68, 71 ~ 74
X
O
X
C46, 52 ~ 54
X
X
O
C29
O
O
X
C42 ~ 51, 55, 56
X
X
O
C67, 69, 70
X
O
X
R33 ~ 38
X
X
O
R54
X
O
X
R25
O
O
X
R39
X
X
O
J21
X
O
X
J1, 40, 44
X
X
O
O : USED
X : NOT USED
Point
u
(Pin12 of IC4)
V : 2V/div
H : 0.1
µ
sec/div
DC range
1 : 1 probe
Point
y
(Pin20 of IC2)
V : 2V/div
H : 0.1
µ
sec/div
DC range
1 : 1 probe
0V
0V
TUL
E
TUR
12V
TUMUTE
TUCE
TUDATA
TUCLK
TUDO
STAD
STEIN
P.C.B. TUNER
(Lead Type Device)
16
30
11
5
W1
AM
GND
FM
FR
OM:
INPUT(1)
P.C.B. TUNER
(Surface Mount Device)
16
30
11
5
9
16
8
1
1
1
10
11
20
12
13
24
u
y
Point
i
(Pin13 of IC2)
V : 2V/div
H : 50 nsec/div
DC range
1 : 1 probe
0V
+B
GND
GND
GND d
DIG in
FROM : INPUT
(1)
FROM : INPUT
(2)
FROM : MD MAIN
FROM : MAIN (1)
ROUT
AGND
LOUT
AGND
RIN
AGND
LIN
12V
—12V
SYSCTL
SYSCK
SYSI
SYSO
/RES
/PDN
DGND
u5.6V
P. C. B. MD
(Lead Type Device)
AGND
AGND
AGND
AVCC
PSWCK
D6.5/5V
GNDd
GNDd
MDDATA
SEARCH
MD—ST
PDOWN
DIGin
DIGout
ROUT
LOUT
RIN
LIN
/LOADSW
D6.5/5V
GNDd
GNDd
DSTB
KDATA
DSCK
/MD—RES
BACKUP
GNDd
P. C. B. MD
(Surface Mount Device)
1
30
31
50
51
80
81
100
14
85
1
4
8
5
1
7
14
8
8
Summary of Contents for GX-900
Page 103: ...GX 900 GX 900 ...