Sony HCD-GX450 - Stereo Mini System, Service Manual

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19 19
HCD-GX450
HCD-GX450
4-2. BLOCK DIAGRAM – AUDIO/VIDEO SECTION –
INPUT SELECT,
TONE CONTROL,
ELECTRICAL VOLUME
IC101
37 TONE OUT1
15 REC OUT1
33 VOL OUT1
35
BBIN1
25 SW OUT
VOL OUT1
DBFB
R-CH
R-CH
R-CH
SW OUT
19
SI
1 CD L
61 TUNER L
3 TAPE L
9 TAPE A1
7 PB OUT1
11 TAPE B1
63 MD L
36 VIN1
CD-L
A
BD/DRIVER
Section
HP IN
•
SIGNAL PATH
: CD
(DECK B)
: TAPE PLAY (DECK A)
: REC
•
R-ch is omitted due to same as L-ch.
: TAPE PLAY (DECK B)
: TUNER
: AUDIO
: VIDEO
CE
TUNED
STEREO
DO
DI
CLK
40
AMS OUT
BAND-PASS
FILTER
Q111, 112
FEED BACK
SWITCH
Q141
55
SAOUT1
18
SC
66
I-LC72121-DI
65
O-LC72121-CLK
68
O-LC72121-CE
69
I-TUNED
70
I-STEREO
90
O-REC/PB
91
O-BIAS
67
O-LC72121-DO
TU-MUTING
71
O-ST-MUTE
HP IN
81
I-HP/AUDIO IN
92
I-TAPE-AMS
93
I-STREAM
94
I-VACS
D923 D921
1
O-BD3401-DATA
2
O-BD3401-CLK
87
O-B-SOL
86
O-A-SOL
85
O-MOTOR
CAPSTAN/REEL
MOTOR DRIVE
Q341, 342
PLUNGER DRIVE
(DECK-A)
Q345, 346
M M
(CAPSTAN/REEL)
(DECK-A)
(DECK-B)
PLUNGER DRIVE
(DECK-B)
Q343, 344
A-HALF
A-MODE
REC (REW)
A-PHOTO
B-PHOTO
I-REEL-A
I-REEL-B
88
83
84
I-TAPE-A-STAT
B-HALF
B-MODE
REC (FWD) 89 I-TAPE-B-STAT
SYSTEM CONTROLLER
IC901 (2/4)
TAPE MECHANISM
DECK BLOCK
TUNER PACK
AM
L
R
VIDEO
AUDIO
J803
J804
FM ANT
AM ANT
TUNER-L
TUNER-R
LC72121 CE
CE
R-CH
R-CH
ANT GND
ANT GND
TUNED
TUNED
STEREO
STEREO
TU MUTE
TU-MUTING
LC72121 DI
DO
LC72121 DO
DI
LC72121 CLK
CLK
FM 75
Ω
COAXIAL
VIDEO
OUT
GEME
INPUT
BIAS OSC
L201
REC BIAS
SWITCH
Q231, 232
+9V
BIAS OSC
Q201
PB MUTING
Q209
REC MUTING
Q205, 207
ERASE
HRPE1
(REC/PB/ERASE)
(DECK-B)
HP1
(PB)
(DECK-A)
L-CH
R-CH R-CH
R-CH
Q203
L-CH
R-CH R-CH
R-CH
B
AMP
Section
32 VOL OUT2
30
BBIN2