DOWNLOAD Sony HCD-GX20 / MHC-GX20 Service Manual ↓ Size: 4.53 MB | Pages: 53 in PDF or view online for FREE

Model
HCD-GX20 MHC-GX20
Pages
53
Size
4.53 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
hcd-gx20-mhc-gx20.pdf
Date
PREV: Sony CMT-EP303 / HCD-EP303 Service Manual

Sony HCD-GX20 / MHC-GX20 Service Manual ▷ View online

26
26
HCD-GX20
5-7. Schematic Diagram – MAIN Section (1/4) –
• See page 34 for IC Block Diagrams.
• See page 19 for Waveforms.
2.3
5.3
2.6
1
1
2.6
2.6
5.1
6.9
0
0
0
0
0
0
11.9
6.4
2.3
8
8
2.3
2.3
4.5
8.1
8
0
6.9
3.4
3.1
3.1
0.3
0
2.5
2.3
2.1
2.2
3.4
3.4
0
0
4.9
0
0
0
0.2
0.2
9.6
11.8
5.6
4
1
2
3
4
5
6
9
10
11
12
14
15
17
18
16
13
MAIN BOARD
    
(1/4)
TO
MAIN BOARD
(3/4)
TO
CD
BOARD
CN734
(Page 24)
TO
MAIN BOARD
(3/4)
TO
MAIN BOARD
(2/4)
TO
MAIN BOARD
(3/4)
TO
MAIN BOARD
(2/4)
AM
ANTENNA
FM75
Ω
RF IF
AMP
+B SWITCH
3
4
2
4
1
B
IC102
PLL
IC101
AM FM IF MPX
0.022
0.022
MUTE
MUTE
RV101
FM TUNED
LEVEL
IFT101
AM IF
T101
NULL
CN704
IC B/D
IC B/D
27
27
HCD-GX20
5-8. Schematic Diagram – MAIN Section (2/4) –
• See page 19 for Waveforms.
0.6
0.6
0
0
0
4.5
0
0.6
1.2
9.4
0.2
3.7
2.5
0.6
4.7
2.9
12
12
0
0
0.7
0.7
0.7
0.7
0
0
0
0.7
0.7
5.7
1.3
1.2
0.6
4.8
3.4
0
0
0
4.7
0
0
4.8
4.7
0
5
4
4.4
4.7
0.2
0.2
4.8
4.4
4.7
4.8
0
4.7
5.9
5.9
5.9
11.5
7.1
0.2
0.8
0.2
0.8
5.5
5.6
2.7
3.4
5.1
0
0
0
0
0
0
0
0
0
9
9
9
9.1
9.1
9.1
9.1
9.1
9.1
0
0
11.9
11.2
11.9
11.9
2.9
4.7
4.7
1.2
4.8
2.9
2.9
4.7
4.8
4.7
2.4
4.8
AMS
AMS
AMS
SPEANA(R)
SPEANA(L)
5
4
20
19
1
21
22
2
24
3
25
28
29
1211 26 27
23
30
31
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
33
32
MAIN BOARD
    
(2/4)
TO
MAIN BOARD
(3/4)
TO
MAIN BOARD
(3/4)
TO
MAIN BOARD
(3/4)
TO
MAIN BOARD
(1/4)
TO
MAIN BOARD
(1/4)
TO
MAIN BOARD
(4/4)
7
C
1
6
2
8
5
IC303
BUFFER
IC202
BUS SHIFT 
REGISTER
TO
PANEL BOARD
CN601
(Page 31)
TAPE DECK
(2/2)
TAPE 
DECK
(1/2)
RESET
Q222,223
B SOL DRIVE
Q224,225
A SOL DRIVE
Q226,227
M +B CONT
BIAS OSC
Q201-204
SWITCH
SWITCH
SWITCH
BIAS
REC BIAS
IC201
DECK A/B SELECT
PB/REC EQ AMP
DECK A
DECK B
CN603
50V
50V
28
28
HCD-GX20
5-9. Schematic Diagram – MAIN Section (3/4) –
• See page 34 for IC Block Diagrams.
11.4
4.4
4.7
11.4
4.3
4.6
5
13.6
13.6
13.6
5.6
9
15.4
0
0
0
0
0
0.8
0.7
0
4.3
2.9
11.9
12
12
4.6
0.7
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
4.6
9.2
0
0
4.6
4.6
4.6
4.6
4.6
4.6
24.6
0.6
13.6
13.6
4.8
13.6
CN402
26
27
49 50
20
19
21
51
2829
52 53 54
25
55
585960616263646566
67 69 70
80
71 74
75 76 77 78 79
4
5
24
6
23
9
10
13
14
15
16
17
18
22
4
8
9
5
TO
MAIN BOARD
(1/4)
TO
MAIN
BOARD
(2/4)
TO
MAIN
BOARD
(4/4)
TO
MAIN
BOARD
(2/4)
TO
MAIN BOARD
(1/4)
TO
MAIN BOARD
(2/4)
MAIN BOARD
    
(3/4)
3
6
IC301
SOUND PROCESSOR
IC804
+5V REG
IC803
+5.6V REG
IC801
+9V REG
IC802
+12V REG
BUFFER
BUFFER
SWITCH
PROTECT CONT
PROTECT SWITCH
Q806,813
RELAY DRIVE
RELAY DRIVE
F
TO
POWER BOARD
CN502
(Page 33)
IC B/D
29
29
HCD-GX20
5-10. Schematic Diagram – MAIN Section (4/4) –
4.0
0
0
0
0
12
11.8
0
0
0
0.7
11.9
11.9
11.1
4.8
4
4.4
4.4
4.4
4.4
4
0.7
0.7
0
0
0
5.6
4.4
4.4
4.4
4.4
0.7
0
0
0
0
0
0
6.6
1.2
1.9
0.7
0.7
5.8
1.5
2.1
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
TO
MAIN BOARD
(2/4)
TO
MAIN BOARD
(3/4)
49 50
51
52 53 54
55
58596061626364656671 67 69 70
80
74 75 76 77 78 79
MAIN BOARD
    
(4/4)
7
9
+
+
-
-
SPEAKER
TO
PANEL 
BOARD
CN691
E
(Page 31)
TO
POWER
BOARD
CN503
D
(Page 33)
SWIITCH
Q331,332
MUTE
Q315,316
MUTE
Q313,314
MUTE CONT
Q809,810
PROTECT DETECT
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
BUFFER
SWITCH
SWITCH
SWITCH
JK303
CN403
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