Sony HCD-DX70 Service Manual ▷ View online
21
21
HCD-DX70
6-1. CIRCUIT BOARD LOCATION
POWER board
MAIN board
SENSOR board
SUB TRANS board
MAIN TRANS board
CD SW board
PAD SWITCH board
PANEL board
DRIVER board
VIDEO board
SW board
HEAD (B) board
HEAD (A) board
BD board
MOTOR board
CD SENSOR board
• WAVEFORMS
1
IC101 yj (XTAO)
CD PLAY MODE
6.4Vp-p
16.9344MHz
1.2Vp-p
2
IC101 ta (RFAC)
CD PLAY MODE
3
IC101 ra (TE)
CD PLAY MODE
4
IC101 el (FE)
CD PLAY MODE
400nsec/div
approx 200mVp-p
approx 170mVp-p
1
IC501 qa (XC-OUT)
STOP MODE
3.0Vp-p
32.768kHz
3.4Vp-p
2
IC501 qd (X-OUT)
STOP MODE
3
T301 4
TAPE B REC MODE
16MHz
120Vp-p
80.7kHz
1
IC601 is (XOUT)
STOP MODE
4.8Vp-p
4MHz
– BD BOARD –
– MAIN BOARD –
– PANEL BOARD –
HCD-DX70
22
22
6-2. BLOCK DIAGRAMS
– TUNER/CD SECTION –
: FM
: AM
: CD
• Signal Path
• RCH is omitted
: DIGITAL OUT
FM 75
Ω
G
AM
TM1
ANT IN
1
7
IF OUT
8
OSC OUT
5
VT
FE1
DX7,DX7J MODEL
JR9
+B
A+12V
Q2
FM
10
FM OSC
16
AOUT
20
AIN
19
PD
18
PLL
IC51
12
FM/AM IF
7
FM
15
AM OSC
9
VCO STOP
8
IF REQ
6
DO
4
DI
5
CL
3
CE
XIN
1
XOUT
22
X51
4.5MHz
RF IF
AMP
AMP
Q1
CF1
CF2
DO
DI
CL
CE
2
11
4
9
RB4
6
3
10
7
8
1
2
AM MIX OUT
IF OUT
9
FM
11
OSC FM
24
VCO STOP
12
IF REQ MUTE
10
AM RF IN
21
AM OSC
23
VCC
9
FM IF
1
AM/FM IF MPX
IC11
13
L OUT
14
R OUT
BUFFER
Q11
LPF11
LPF
4
AM IF IN
IF11
R-CH
A
MAIN
SECTION
6
TUNED
7
STEREO
RV11
ST MUTE
21
CE
22
CL
27
MC DI
25
MC DO
23
STEREO
2
TUNED
3
MASTER CONTROL
IC501(1/2)
DO
CL
CE
DI
DI
OPTICAL PICK-UP
BLOCK
(A,MAX3)
+5V
LD
DRIVE
Q101
RF AMP
IC103
VC
27
A
6
B
7
C
VCC
8
D
9
E
10
F
11
LD
1
PD
2
IC102
MOTOR/COIL DRIVE
CH1OUTR
13
CH1OUTF
14
CH2OUTR
11
CH2OUTF
12
CH3OUTR
18
CH3OUTF
17
M
M102
SLED
MOTOR
CH4OUTR
16
CH4OUTF
15
M
M101
SPINDLE
MOTOR
3
CH1RIN
2
CH1FIN
6
CH2RIN
5
CH2FIN
23
CH3RIN
24
CH3FIN
25
CH4INSIN
20
MUTE
MDP
26
SFDR
28
SRDR
29
TRDR
31
TFDR
30
FRDR
33
FFDR
32
SSTP
27
DIGITAL SIGNAL PROC.
D/A CONV.
IC101
DIGITAL SERVO
60
D OUT
29
RFDCI
28
RFDCO
16
FE
18
TE
22
VCC
12
HOLD SW
RFDC
43
FE
39
TE
41
SE
40
RFAC
51
15
72
L OUT1
DIGITAL
OUT
OPTICAL
CD
DIGITAL OUT
IC201
75
L OUT2
5
DATA
B
MAIN
SECTION
R-CH
L OUT
L-CH
7
CLOK
6
XLAT
2
SQCK
9
SCLK
20
SCOR
1
SQSO
66
XTAI
67
XTAO
3
XRST
X101
16.9344MHz
CD DATA
35
CD CLK
37
XLT
42
SQ CLK
33
SCOR
19
SQ DATA
32
XRST
43
HOLD
41
TBL ADDRESS
SENSOR
49
T SENS
IC711
48
BU UP/DOWN SW
46
OPEN SW
47
CLOSE SW
44
MTR CNT2
OPEN/CLOSE
S701
BU UP/
DOWN
S711
45
MTR CNT1
MOTOR
DRIVE
9
7
4
2
M
IC701
TURN
MOTOR
M721
(Page 23)
(Page 23)
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)
HCD-DX70
24
24
6-3. SCHEMATIC DIAGRAM – BD SECTION – • See page 21 for Waveforms. • See page 49, 50 for IC Block Diagrams. • See page 44 for IC Pin Function.
IC B/D
IC B/D
IC B/D
(Page 28)
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