Pin Connection Diagram - Yamaha GX-900 Service Manual

A B
GX-900
PRINTED CIRCUIT BOARD (Foil side)
1
P.C.B. MAIN(2)
FROM: POWER CORD
AC1
AC2
2
GY
BR
TO: MAIN(3)
FROM: INPUT(1)
3
P.C.B. MAIN (3)
HAC
4
LAC
E
E
E
LAC
HAC
CDAC2
CDAC1
FAC2
FAC1
#10
W203
5
TO: MAIN (1)
#9
W204
TO: MAIN (1)
82
6
C
P.C.B. MAIN(6)
ACIN
SUBB
PRON
SUBE
P.C.B. MAIN (5)
FROM: MAIN(1)
TO: MAIN (2)
D E

PIN CONNECTION DIAGRAM

ICs
NJM78L05A M5237L
1:INPUT
1:OUTPUT 2:COMMON
2:COMMON 1 3:OUTPUT
1
2 3 2 3
3:INPUT
µPC4570G2
BA3835S
5
8
9
18
1
LA1838
LA6541D
YSS247-D
12
30
24
1
CXA1897Q
36 25
37 24
48 13
1 12
Diodes
1SS133 1SS355
1SS270A 1SS380
MA8039-H
MTZJ13.0B
MTZJ27.0D MA8047-H
MA8051-H
MA8056-M
Anode
E
E
-LB
-HB
-12V
Cathode
-27V
Transistors
2SA933S (Q, R) 2SA893 (D, E)
2SC1740S (R, S) 2SB647 (C, D)
DTA114ES 2SC535 (A, B, C)
DTC114ES 2SC1815 (Y)
2SC1890A (D, E)
2SC2878 (A, B)
2SC4208A (Q, R, S)
B
C
E
E
C
B
83
F G
µPC4570HA
BA15218N TA8409S
µPC1330HA
9
8
1 1
1
µPD4066BG
TC4052BF LC72131M
TC74HC125AF TA2040AF
TC74HC04AF TC74VHC153F
9
8
20
16
8
4 14
7
1
1
1
AN8806SB M66004MASP
19
15 18
36
1 1
LC75393E MN662741RPB1
60
41
48 33
61 40
49 32
64 17
80
1 16
1 20
MA8056-L S1VB20 D3SBA20
MA8062-M D5SB20
MA8068-L
MA8068-M
MA8091-H
Anode
MA8091-M
MA8100-L
MA8100-M
–
+
Cathode
2SD1938 (S, T) 2SB1565 (E, F) 2SB1237 (Q, R)
DTA114EKA 2SD2394 (E, F) 2SD1858TV2 (Q, R)
DTA144EKA 2SD2396 (J, K)
DTC114EKA
DTC124EKA
DTC144EKA
DTC143XKA
DTC143TKA
C
E
B C C
B E
E
H
LB1641 STK496-420Y
10
9
2 2
1
1
LC72720NM
13
11
12
10 24
1
1
32
64
1
M38199EFFP
M30624FG
80 51
81 50
21
100 31
1 30
–
+
B