Sony HCD-GX450 / MHC-GX450 Service Manual ▷ View online
41
41
HCD-GX450
5-17. PRINTED WIRING BOARD – AMP SECTION –
• See page 21 for Circuit Boards Location.
•
: Uses unleaded solder.
Ref. No.
Location
D401
F-3
D441
D-6
D442
D-6
D443
D-2
D481
D-6
D482
D-4
D483
C-9
IC441
B-7
Q441
D-6
Q442
D-6
Q481
D-9
Q482
D-8
Q483
D-8
Q484
D-8
Q485
C-4
Q486
C-4
Q487
C-4
Q488
C-5
Q489
C-9
• Semiconductor
Location
IC441
SPEAKER
(IMPEDANCE USE 6–16 )
+
-
+
-
L
R
(CHASSIS)
(CHASSIS)
(CHASSIS)
MAIN
BOARD
CN307
(Page 30)
TRANS
BOARD
CN905
(Page 40)
SUB-WOOFER
BOARD
CN502
(Page 35)
E
E
E
E
E
E
E
E
E
E
1
7
1
3
13
1
1
2
A
B
C
D
E
F
G
3
4
5
6
7
8
9
10
R462
JW400
JW472
L442
R461
RY441
L441
D443
JW408
R407
JW409
JW416
JW418
JW419
JW415
CN441
JW410
JW433
C406
JW407
JW411
JW412
JW417
R402
D401
C404
C403
JW445
R401
JW444
JW443
JW402
C405
JW434
JW401
R489
JW435
JW436
JW446
JW447
JW454
JW453
JW452
CN443
JW455
JW456
JW457
JW458
JW459
JW460
JW461
JW462
JW437
JW438
JW439
JW440
D481
D482
R490
JW422
JW433
JW424
JW425
JW473
JW474
Q488
JW426
JW427
JW420
JW421
JW414
C402
Q487
C408
EP401
JW413
C407
C486
R482
R488
R487
C487
Q485
R481
R448
R446
R442
Q486
C411
C442
C448
C444
R444
R414
R412
R413
R441
R447
JW451
JW442
C446
JW450
C447
R445
C445
JW449
C443
R443
C441
R411
JW441
C489
JW428
JW429
R460
R458
D442
D441
R457
R459
R456
Q442
Q441
R455
JW430
JW431
R495
JW463
JW432
R496
R452
JW404
JW403
R451
JW466
JW467
TH441
C452
C454
Q483
Q484
EP491
R454
JW464
R453
JW465
JW469
JW470
JW471
C492
Q489
C453
C451
R485
R484
R483
R486
C481
Q481
Q482
R466
R465
R492
R494
R493
D483
C488
R491
R467
JW468
JK441
CN442
EP402
LP401
42
42
HCD-GX450
5-18. SCHEMATIC DIAGRAM – AMP POWER SECTION –
C403
C404
C441
C442
C908
EP401
EP402
Q441
Q442
Q481
Q482
Q483
Q484
Q485
Q486
Q487
R441
R442
R446
R458
R459
R460
R495
RY901
D908
R902
C
4
0
7
C
4
08
D
9
0
6
R492
R494
JW917
JW401
J
W
4
0
2
JW403
JW404
RY441
R481
R487
R488
R490
C911
C447
C448
L441
L442
R461
R462
D401
IC441(1/2)
IC441(2/2)
TH441
JW909
C405
C406
Q488
R451
R452
R411
R412
C446
JW441
JW442
FH908
FH907
FH910
FH912
FH909
FH911
F904
F905
F906
FH913
FH914
F907
C906
R908
C910
C909
R903
R904
Q902
C
9
2
4
C
9
2
5
C
9
2
6
CN906
CN902
D905
D903
D902
D904
D
9
0
1
JW903
JW906
JW910
JW902
W001
CN901
PT901
CN905
CN907
C402
R
4
5
6
D
4
4
2
D
4
4
1
C489
R402
EP491
Q489
R467
R491
C445
R413
R493
C488
R447
C451
C453
D
4
8
1
R453
C481
R485
R483
R484
R486
C444
R444
R414
C487
R489
D
4
82
C411
R401
D443
R407
R455
R466
R465
JW407
R496
R457
C486
R482
C454
C452
R454
R448
R445
R443
C443
C492
D483
CN442
CN443
JK441
CN441
PT902
CN904
C
9
2
0
C
9
2
1
C
9
2
2
C
9
2
3
CN903
0.1
100V
0.1
100V
10
50V
10
50V
220
63V
63V
TERMINAL, EARTH
TERMINAL, EARTH
2SC1841
2SC1841
2SC2785
2SC2785
2SC2785
2SC2785
2SA1175
2SC2785
2SC2785
1k
1k
1k
22k
47k
47k
1
1/4W
FR
RELAY U
10EDB40-TB3
0
.0
1
1
6
V
0
.01
1
6
V
M
T
Z
J-T
7
2
-2
7
D
1k
1/4W
2.2k
1/4W
1/4W
JW
JW
JW
JW
JW
SP RELAY
12V
4.7k
1/4W
1/4W
33k
1/4W
22k
1/4W
4.7k
1/4W
1/4W
1000
25V
22
35V
22
35V
10 1/2W
10 1/2W
0.1
1 1/4W
100
50V
50V
10
50V
12k
1k
2SA1932
0
.1
0
.1
0
.1
3P
3P
10EDB40-TB3
10EDB40-TB3
10EDB40-TB3
10EDB40-TB3
1
S
S
1
3
3T
-7
7
2P
3P
10P
0.01
16V
1
k
1
S
S
1
3
3
T
-7
7
1
S
S
1
3
3
T
-7
7
100
100V
100k
TERMINAL,
EARTH
2SC1841
33k
1/4W
22k
1/4W
33k
1/4W
22
35V
0.1
0.1
1
S
S
1
33
T
-7
7
10
1/2W
100
10V
10V
100k
1/4W
1/4W
100k
1/4W
1/4W
1000p
4.7
50V
50V
4.7k
1/4W
1/4W
1S
S
1
3
3
T
-77
0.01
16V
100k
1SS133T-77
100
1/2W
1k
56k
1/4W
47k
1/4W
JW
100 1/4W FR
22k
2.2
50V
50V
10k
1/4W
0.1
0.1
10
1/2W
1k
1000p
0.01
1SS133T-77
3P
13P
2P
0
.0
1
0
.0
1
0
.0
1
0
.0
1
2P
3.3M
1/2W
1/2W
JW
3300
63V
3300
63V
0.22
5W
0.22
5W
STK403-130
STK403-130
TH-10K
D10XB20
2SC2001
LK
2.2k
1/4W
1/4W
2.2k
1/4W
1/4W
100p
50V
JW
JW
T8.0AL/125V
T8.0AL/125V
T3.15AL/125V
T3.15AL/125V
JW
JW
JW
JW
AC CORD U
100p
50V
4.7k
1/4W
47k
1/4W
22
1/4W
56k
1/4W
47k
1/4W
4.7k
1/4W
47k
1/4W
47k
1/4W
7P
43
HCD-GX450
• IC BLOCK DIAGRAMS
IC251 BA5947FM (BD81A BOARD)
IC701, 712 BA6956AN (DRIVER BOARD)
1
2
3
4
5
6
7
8
9
CONTROL LOGIC
TSD
VREF
OUT2
OUT1
RNF
VM
VCC
FIN
GND
RIN
15
16
17
18
19
20
21
22
23
24
25
26
27
36
28
29
30
31
32
33
34
35
1
2
3
4
5
6
7
8
9
10
11
12
13
14
LEVEL
SHIFT
SHIFT
F
R
R
F
R
F
F
19k
6.5k
50k 50k
100k
50k
PIN3
10k
Vref
50k 50k
PIN26
(ch1, 2)
POW
VCC
(ch3, 4)
SW
Pre
Vcc
INTER
FACE
INTER
FACE
INTER
FACE
R
F
50k 50k
POW
VCC
MUTE
Vref
POW
VCC
R
F
10k
CH1PUTF
CH1OUTR
CH2OUTF
CH2OUTR
POWVCC
CNF4
GND
C-M
C-P
VG
CH2RIN
CH2FIN
CH1RIN
CH1FIN
SW
OPIN+
OPIN-
NC
CH4OUTR
CH4OUTF
CH3OUTF
CH3OUTR
POWVCC
MUTE
GND
GND
PREGND
CT
CH3RIN
CH3FIN
CH4IN
CH4CAPA
OUTVREF
DPOUT
TREVCC
NC
D
D
D
D
D
D
D
D
44
HCD-GX450
IC301 TC94A34FG-002 (BD81A BOARD)
33
34
35
36
37
38
39
40
41
42
1
8
43
61
62
63
64
60
59
56
52
50
47
46
45
44
48
49
25
26
27
28
29
30
31
32
17
18
19
20
21
22
23
24
9
10
11
2
3
4
5
6
7
58
57
55
53
51
12
13
14
15
16
54
RAS
CAS
OE
WE
PIO7
PIO6
PIO5
PIO4
Bus
Switch
BUCK
CCE
AD12
AD11
Gener
al
In/Output P
or
t
Address Calc.
2sets
Y-
Po
inter
register
C-P
ointer
register
X-P
ointer
register
VDDM
SRMSTB
VDDT
AD10
AD9
ERAM
2k w
ord
CRAM
4k w
ord
CR
OM
4k w
ord
YRAM
4k w
ord
XRAM
4k w
ord
SRAM/
DRAM I/F
SRAM I/F
1Mbit
SRAM
X-Bus
Y-
Bus
AD7
AD6
AD5
AD8
VC0
Timing
Generator
PRAM
Instr
uction
Decoder
Prog
ram
Control
MCU
. I/F
register
XO • X1 • X2
Y0 •
Y1 •
Y2
MX
MY
MZ
MA
C
A0
A1
AX
A
Y
ALU
A2
A3
DIT
round & limit
round & limit
Au
d
io I/F
LRCKIA
BCKIA
SDI0
LRCKO
BCKO
SDO0
VSS
VDDT
MIACK
MICK
MIDIO
MILP
MICS
STANBY
RESET
VDDP
AD4
AD3
AD2
AD1
AD0
VSS
VDD
CK
O
VDDX
XO
TEST
VCOI
VSSX
XI
MIMD
VSSP
PIO3
PIO2
PIO1
PIO0
VSS
CKI
VDD
TXO
SFSY
SBSY
DA
T
A
POM
Sub code
I/F
CDP Cont
I/F
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