Read Sony HCD-GX750 / HCD-RG551 / HCD-RX550 / MHC-GX750 / MHC-RG551S Service Manual online
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28
HCD-GX750/RG551/RX550
5-3. BLOCK DIAGRAM — MAIN SECTION —
TBL ADDRESS SENS
OPEN SW
E-2
E-1
E-3
LM-R
LM-F
LM-F
TM-R
TM-F
LM-R
LM-F
TM-R
TM-F
TM-F
D
CD
SECTION
INVERTER
Q371
SW ON/OFF
SW OUT
SW LIMITER
OVERLOAD/DC
RELAY-
C
SUB WOOFER
SECTION
E
SUB WOOFER
SECTION
TM901
TUNER
TUNER
SOUND PROCESSOR
IC101
BUFFER
IC102
61 TUNER_L
19 SI
SP R-CH
18 SO
59 GAME-L
9 TAPEA1
11 TAPEB1
15 REC-OUT1
DATA
RCLK
1 CDL
24 I-STREEMA/VACS
75 SYSTEM-MUTE
69 AMS
69 AMS
19
WFR/HP/MIC
18
PROTECT
73
CD NUM SENSOR
21
CD-OPEN/CLOSE
20
CD ENCORDER
CLK
DATA
DATA
91
88
25
SW OUT
35
34
BBIN1
BBNF1
31
BBNF2
40
ASMOUT
11 Q5
12 Q6
7 Q1
6 Q0
CD-R
R-CH
R-CH
CD-L
MP3-STB
R-CH
FRONT SP RELAY
R-CH
SP DRIVER
IC371
BUFFER
IC104
SELECTOR
IC201
IC601(1/2)
OVERLOAD DET
Q481,482
OVERLOAD DET
Q441,442
RELAY DRIVE
Q485-488
R-CH
RY441
3 DATA
DO
5 LCK
LCH
4 CLK
18 SO
10 WIRELESS
11 MP3 STB
CLK
SO
7
8
SOL-B
SOL-B
SOL-A
MOTOR
6 SOL-A
MOTOR
VIDEO BUFFER
IC602
L
R
GAME INPUT
WIRELESS
LED602
GX750
M+9V
VIDEO OUT
JK441
BUFFER
Q106
BUFFER
Q107
BUFFER
Q327
MUTE
Q103
MUTE
Q108
MUTE
CONTROL
Q101,102
MUTE
STK
AC3
RELAY+B
+Vcc
GX750/RX550:Q489-491
RG551:Q489
FAN
DRIVE
Q310-Q312
OVERHEAT
DET
Q483,Q484
TH441
MUTE
Q306
CD-MUTE
MUTE
CONTROL
Q304,305
TUNER-L
TUNER-R
DO
DI
CLK
CE
TUNED
STEREO
TU-MUTE
DO
DI
CLK
CE
TUNED
STEREO
J804
J803
DECK-A
DECK-B
VIDEO
R-CH
L
R
BIAS
OSC
Q321
Q324
+9V
STK
CD-MUTE
R-CH
REC SW
CONT
P/B SW
R-CH
L
R
HP2
HP1
L
R
HRP2
HRP1
HE1
L101
TAPE
STK MUTE
CONTROL
Q308
10 Q4
FRONT SP RELAY
17 Q11
LM-R
13 Q7
LM-F
14 Q8
TM-R
15 Q9
TM-F
16
4
Q10
DATA
AC4
SO
CLOCK
B
CD
SECTION
J801
PHONES
FAN901
I-REEL-A
23
22
70
70
TAPE B START+
TAPE A START+
A SOL
A-PHOTO
REC(FWD)
B MODE
A MODE
B HALF
A HALF
REC(REW)
I-REEL-B
71
CLK
84
85
85
86
CE
DI
DO
LCH
87
B-PHOTO
B SOL
CLK
CE
68 STEREO
67 TUNED
STEREO
TUNED
DATA
RCLK
DO
83
DI
LCH
CAPM+
55
SAOUT2
30
BBIN2
SWITCH
Q351,Q352
STK MUTE
CONTROL
Q309,313
SWITCH
Q105
DEF
Q303
SPEAKER
33
VOUT1
32
VOUT2
5
1
9
7
4
SWITCH
Q322,323
3
5
LCH
CAP M DRIVE
Q601
B TRIP DRIVE
Q602
A TRIP DRIVE
Q603
POWER AMP
IC441
AUDIO
MECHANISM DECK
SOL-B
SOL-A
MOTOR
SYSTEM CONTORLLER
GX750/RX550
RG551
• Signal Path
• R-CH is omitted due to same as L-CH.
: TUNER
: CD
: PB(DECK A)
: PB(DECK B)
: AUDIO
: REC(DECK B)
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