Read Sony HCD-DX70 Service Manual online
23
23
HCD-DX70
– MAIN SECTION –
: FM
: CD
• Signal Path
• RCH is omitted
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
REC
BIAS
BIAS
TRAP
TRAP
R-CH
R-CH
R CH
BIAS
OSC
Q302,303
RV304
Q301
TA+12V
C332,L301
ERASE
HEAD
REC/PB
HEAD
PB EQ
AMP
IC304
RV303
IC302
REC/PB SWITCH
REC
EQ
BIAS
SW
DOLBY
B
NORM
CROM
REC(L)
LEVEL
LEVEL
RV301
40
1
2
3
4
48
46
A
B
70
120
PB
REC
DOL
PAS
PB
REC
36
33
32
38
39
43
BIAS ON/OFF
20
B NORM/CROM/METAL
ALC ON/OFF
15
RM ON/OFF
22
NR ON/OFF
23
REC /PB/PASS
24
LM ON/OFF
25
MS OUT
26
A
TUNER
SECTION
B
CD
SECTION
MD/VIDEO
(AUDIO)
R-CH
L-CH
LOUT
L-CH
J101
L
R
R-CH
PB
HEAD
DECK-B
DECK-A
PB EQ
AMP
IC303
RV302
SWITCH
Q304,305
17
A120/70
PB A/B
16
NORM/HIGH
18
DECK PROC.
IC301
INPUT SELECT
TONE/VOL CONT
IC101
IN2A
40
IN2C
38
IN2D
37
INVOL OUT2
35
IN2B
39
24
VOL OUT2
DATA
21
CLOCK
22
R-CH
1
REF
DBFB
SWITCH
Q503
DBFB
CONT
Q101,102
5
6
7
IC102
MUTE
Q103
Q103
MUTE
CONT
CONT
Q504,505
POWER
AMP
IC501
18
12
10
R CH
J102
MUTE
Q581
MUTE
CONT
CONT
Q503,504
MUTE
Q862
MUTE
CONT
CONT
Q861
D551
OVER LOAD
DETECTOR
Q501, 551
OVER HEAT
DETECTOR
Q505,506
+B
D502
PROTECT
DETECTOR
Q821,822
PROTECT
CONT
Q823
PROTECT
SWITCH
Q828,829
RELAY
DRIVE
DRIVE
Q824,825
RY801
J631
PHONES
R CH
R CH
SURROUND
SPEAKER
L
R
TM801
SPEAKER
90
B SHUT
89
A SHUT
57
B PLAY
56
A PLAY
91
B HALF
70
A HALF
67
PB A/B
A TRIG
DRIVE
CAP MOTOR
DRIVE
Q396,397
Q393,394
CN304
B TRIG
DRIVE
Q391,392
CAP MOTOR
SPEED CONT
Q395
A TRIG
51
B TRIG
52
CAP M H/L
54
CAP M CONT
55
TC BLOCK
A120/70
B120/70
A HALF
B HALF
A PLAY
B PLAY
A SHUT
B SHUT
A TRG M+
B TRG M+
CAP M H/L
CAP M+
19
69
TC RELAY
IC501(2/2)
MASTER CONTROL
66
EQ H/N
68
ALC
65
BIAS
61
REC MUTE
60
NR ON/OFF
59
R/PB PAS
58
TC MUTE
53
AMS IN
80
GEQ DATA
81
GEQ CLK
79
DBFB ON/OFF
DC
BIAS
Q141
+6V
A+12V
82
LINE MUTE
83
STK MUTE
87
FRONTRELAY
88
PROTECT
30
IIC DATA
10
XC IN
11
XC OUT
15
X IN
13
X OUT
32.768kHz
X501
16MHz
X502
BPF 0
BPF 5
P1
P47
G1
G13
FLOURESCENT
INDICATOR TUBE
DISPLAY CONTROL
IC601
F1
F2
LED
DRIVER
Q606-614
D604-609
D612-618
D612-618
11
FUCTION
KEY
60 IIC DATA
61 IICCLOCK
VOL 1A
80
VOL 1B
79
S751
VOLUME
X601
4.0MHz
FL601
IC602
6
47
1
5
93
100
67
72
ALL BAND
73
HEADPHONE
78
S768-781
10
10
5
PLAY1-3
EXIST1-3
LED
DRIVER
Q630-635
D630-632
54
TAPE/A/B LED
55
TUNER A/B LED
52
REC/PAUSE LED
53
ENTER LED
56
MD/VIDEO LED
57
CD/VCD LED
58
GAME IN LED
LED
DRIVER
Q601-605
D791-793
LED
DRIVER
Q791-793
D751,752
LED
DRIVER
Q751,752
59
DISC 1 LED
74
DISC 2 LED
75
DISC 3 LED
POWER
D794
LED
DRIVER
Q694
12
18
SPEANA
BPF
6
5
4
3
KEY0
CDM M+7V
64
FUCTION
KEY
S753-767
KEY1
65
FUCTION
KEY
S601-606
KEY2
66
77 RESET
83
XIN
82
XOUT
MIC 1
J721
MIC
VOL
RV722
IC722
IC722
29
IIC CLK
100
AC CUT
STBY RELAY
RESET
74
POWER KEY
CD POWER
T301
D822
(Page 22)
(Page 22)
38
12
84
•
T910
EXCEPT MX
MX
MX
EXCEPT MX
S901 (1/2)
AC
IN
IN
REG
VH
-VH
VL
-VL
D541
D543
1
3
REG
1
3
REG
1
3
REG
1
3
RESET
Q891,892
FAN
DRIVER
RELAY
DRIVER
Q971
IC502
IC911
IC951
IC921
IC961
+5.6V
REG
1
3
IC971
CD D+5V
D901-904
D906-909
CD A+5V
A+5V
A+12V
TCA+12V
MCA+12V
VP
VF(1)
VF(2)
STA+12V
CDM M+7V
LED+7V
TCMM+9V
JW975
2
1
CN974
FAN
Q575
F971
F977
F974
F975
F976
JW971
JW974
JW973
JW993
JW954
RY971
D972-975
SUB
TRANSFORMER
T972
D920-922
120
220
230-240
120
220
230-240
JW990
MX
EXCEPT MX
S901 (2/2)
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