Sony HCD-GX750 / HCD-RG551 / HCD-RX550 / MHC-GX750 / MHC-RG551S Service Manual ▷ View online
49
49
HCD-GX750/RG551/RX550
5-26. PRINTED WIRING BOARD — POWER AMP SECTION (RG551) — • Refer to page 30 for Circuit Boards Location.
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
JW400
JW408
JW409
JW410
JW412
JW413
JW414
JW415
JW416
JW418
JW419
JW420
JW421
JW422
JW423
JW430
JW431
JW433
JW434
JW435
JW436
JW437
JW438
JW439
JW440
JW443
JW444
JW446
JW447
JW449
JW451
JW452
JW453
JW454
JW455
JW456
JW457
JW458
JW459
JW460
JW463
JW445
JW432
JW461
JW462
JW469
JW470
JW471
JW411
JW417
JW465
JW464
JW450
JW468
JW467
JW466
JW424
JW425
JW426
JW427
JW429
JW428
JW473
JW474
JW472
D401
R455
C406
R466
R447
C492
C408
JW402
R495
C489
R496
R489
C402
C407
JW401
C411
EP491
R411
D481
R460
R459
Q442
Q441
D442
D441
R458
R457
R412
R456
EP402
C488
R494
R493
R492
D483
Q489
R467
R491
C448
C447
C444
C443
C442
R454
R453
R452
R451
R448
R446
R445
R444
R443
R442
JW403
CN443
R441
JW442
C404
CN441
IC441
EP401
JW405
JW406
TH441
RY441
L441
L442
R461
R462
C403
R487
D443
C445
JW441
C405
R401
R402
R407
C486
R482
Q485
Q486
Q487
R481
R490
D482
C487
R488
R486
Q483
Q484
R483
R484
R485
JW404
R465
Q481
Q482
C481
C451
C452
C453
C454
C446
CN442
JW407
LP401
R413
Q488
R414
C441
JK441
(Page 38)
(Page 50)
(Page 44)
Ref. No.
Location
D401
H-6
D441
E-5
D442
E-4
D443
J-4
D481
E-5
D482
G-4
D483
B-4
IC441
D-3
Q441
D-5
Q442
D-4
Q481
B-4
Q482
B-4
Q483
B-5
Q484
B-5
Q485
G-3
Q486
G-4
Q487
G-4
Q488
F-4
Q489
B-4
• Semiconductor
Location
50
50
HCD-GX750/RG551/RX550
5-27. PRINTED WIRING BOARDS — TRANSFORMER SECTION (RG551) — • Refer to page 30 for Circuit Boards Location.
: Uses unleaded solder.
(Page 38)
Ref. No.
Location
D901
C-3
D902
B-2
D903
B-2
D904
B-2
D905
B-2
D906
C-12
D908
C-10
Q902
C-12
• Semiconductor
Location
(Page 49)
1
A
B
C
D
E
F
G
H
I
2
3
4
5
6
7
8
9
10
11
12
13
14
JW900
PT901
JW926
JW929
JW930
JW917
FH907
FH909
F904
CN907
FH912
FH911
F905
F906
F907
FH913
FH914
R908
C908
C909
R903
D906
R904
C910
Q902
JW909
JW908
JW912
C906
FH910
CN905
FH908
JW907
D908
C925
LP902
LP903
CN904
C911
CN906
C920
C921
C924
C923
C926
C922
JW918
JW920
JW921
JW922
JW923
JW924
JW903
D902
JW906
JW910
CN901
CN902
JW902
JW904
RY901
JW901
S901
D901
CN903
JW905
PT902
D905
D903
JW925
LP901
D904
51
51
HCD-GX750/RG551/RX550
C404
FH910
FH909
FH911
FH912
FH913
FH914
FH907
FH908
C441
C442
C908
Q441
Q442
Q483
Q484
Q485
Q486
Q487
R441
R442
R446
R457
R458
R459
R460
D441
D442
D443
D482
D483
D906
JW917
JW401
JW402
JW403
JW404
C447
C448
CN905
CN907
C920
C921
C922
C923
C924
C925
C926
C910
R904
R903
C909
Q902
C906
CN902
CN906
C911
D903
D902
D904
RY901
R491
R467
C443
C492
R495
C444
C488
CN443
R496
C452
C489
R494
C454
R492
C451
C453
R488
R487
R490
R481
D908
R908
D905
D901
CN901
R455
R456
R493
R445
R454
D481
R453
C481
Q482
Q481
R466
R465
R485
R482
C486
C487
R489
R407
R401
R462
R461
L442
L441
JW407
R402
C403
C408
C407
C411
C402
CN441
CN442
JW907
JW908
JW912
JW909
JW902
JW901
JW910
JW925
JW903
JW904
JW905
JW906
TH441
R483
R447
R448
C446
R444
R412
JW442
R411
JW441
C445
R443
EP491
EP401
EP402
RY441
R486
IC441(1/2)
Q489
R484
JK441
C405
C406
IC441(2/2)
PT901
CN904
CN903
PT902
S901
R413
R451
R414
R452
Q488
D401
F904
F905
F906
F907
5-28. SCHEMATIC DIAGRAM — POWER SECTION (RG551) —
(Page 45)
(Page 37)
(Page 36)
52
52
HCD-GX750/RG551/RX550
IC301 TC94A34FG-002 (BD81A BOARD)
5-29. IC BLOCK DIAGRAMS
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-
P
ointer
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
A
udio 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
D
ATA
POM
Sub code
I/F
CDP Cont
I/F
IC251 BA5947FM (BD81A BOARD)
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
IC701 BA6956AN (DRIVER BOARD)
IC712 BA6956AN (DRIVER BOARD)
IC712 BA6956AN (DRIVER BOARD)
1
2
3
4
5
6
7
8
9
CONTROL LOGIC
TSD
VREF
OUT2
OUT1
RNF
VM
VCC
FIN
GND
RIN
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