Sony MHC-DX8 (serv.man2) Service Manual ▷ View online
HCD-DX8
21
21
PANEL board
LEAF SW board
HEAD (A) board
HEAD (B) board
TRANS board
CD SWITCH board
BD board
DRIVER board
MOTOR board
SENSOR board
MAIN board
POWER AMP board
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARDS LOCATION
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
• WAVEFORMS
1
IC101
yj
CD PLAY MODE
6.4Vp-p
16.9344MHz
1.2Vp-p
2
IC101
ta
CD PLAY MODE
3
IC101
ra
CD PLAY MODE
4
IC101
el
CD PLAY MODE
400nsec/div
approx 200mVp-p
approx 170mVp-p
1
IC401
qa
STOP MODE
3.0Vp-p
32.768kHz
3.4Vp-p
2
IC401
qd
STOP MODE
3
T301
4
TAPE B REC MODE
16MHz
120Vp-p
80.7kHz
1
IC601
oa
STOP MODE
4.8Vp-p
12.5MHz
– BD BOARD –
– MAIN BOARD –
– PANEL BOARD –
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
%
: indicates tolerance.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
• Signal path.
F
: FM
f
: AM
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
J
: CD
c
: digital out
• Abbreviation
AUS
: Australian model
EA
: Saudi Arabia model
MX
: Mexican model
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
Note on Printed Wiring Boards:
•
•
X
: parts extracted from the component side.
•
Y
: parts extracted from the conductor side.
•
b
: Pattern from the side which enables seeing.
• Indication of transistor.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
Q
HCD-DX8
22
22
: FM
: AM
: CD (AUDIO)
• Signal Path
• R-CH: Same as L-CH.
: DIGITAL OUT
: CD (VIDEO)
FM 75
Ω
AM
ANTENNA
ANT IN
8
1
IF OUT
3
F OUT
4
VT
FE602
FM FRONT-END
+B
A+12V
Q602
FM
10
FM OSC
15
VT1 IN
18
VT1
17
PD1
19
PLL
IC651
12
FM/AM IF
7
FM
14
AM OSC
2
VCO STOP
8
IF REQ
6
DO
4
DI
5
CL
3
CE
XIN
1
XOUT
24
X651
4.5MHz
IF
AMP
Q601
NULL
T601
B+ SWITCH
CF601
CF602
DO
CL
CE
1
13
3
4
5
5
12
2
14
15
11
6
7
9
RB641
AM FRONT-END
19
AM MIX OUT
IF OUT
9
AM/FM
12
AM OSC OUT
24
VCO STOP
13
IF REQ MUTE
8
AM RF IN
20
AM OSC
22
V REG
23
FM DET
5
FM IF
1
AM/FM IF MPX
IC601
11
L OUT
10
R OUT
BUFFER
Q611
LPF601
LPF
18
AM IF IN
IFT601
R-CH
A
MAIN
SECTION
6
TUNED
7
STEREO
3
FM SD ADJ
RV611
ST MUTE
22
ST CE
25
ST CLK
28
ST DOUT
26
ST DIN
27
STEREO
23
TUNED
24
SYSTEM CONTROLLER
IC401(1/2)
DO
CL
CE
DI
DI
L-CH
TABLE 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)
OPEN
CLOSE
S711
45
MTR CNT1
MOTOR
DRIVE
9
7
4
2
M
IC701
(TURN)
M721
(Page 23)
FM TUNED
LEVEL
TM601
OPTICAL PICK-UP
BLOCK
(KSS-213D/ZN)
A
B
C
D
E
F
LD
VC
+5V
GND
PD
VR
AUTOMATIC
POWER
CONTROL
FOCUS
COIL
TRACKING
COIL
05
Q101
RF AMP
IC103
VC
12
A
5
B
6
C
7
D
8
E
11
F
10
LD
3
PD
4
IC102
MOTOR/COIL DRIVE
CH1RO
13
CH1FO
14
CH2RO
11
CH2FO
12
CH3RO
18
CH3FO
17
M
M102
(SLED)
CH4RO
16
CH4FO
15
M
M101
(SPINDLE)
F+
F-
T+
T-
3
CH1RI
2
CH1FI
6
CH2RI
5
CH2FI
23
CH3RI
24
CH3FI
25
CH4INS
20
MUTE
MDP
26
SFDR
28
SRDR
29
TRDR
31
TFDR
30
FRDR
33
FFDR
32
DIGITAL SIGNAL PROCESSOR,
D/A CONVERTER
IC101
DIGITAL SERVO,
60
D OUT
RFAC
51
17
RFI
16
RFO
14
FE
13
TE
22
LD ON
21
HOLD SW
RFDC
43
FE
39
TE
41
SE
40
XLON
14
72
L OUT
DIGITAL
OUT
OPTICAL
OPTICAL
IC201
75
R OUT
5
DATA
B
MAIN
SECTION
R-CH
CD L
7
CLOK
6
XLAT
2
SQCK
9
SCLK
20
SCOR
1
SQSO
27
SSTP
66
XTAI
67
XTAO
3
XRST
8
SENS
S101
(LIMIT)
X101
16.9344MHz
CD DATA
35
CD CLK
37
XLT
42
SQ CLK
33
SCOR
19
SQ DATA
32
XRST
43
SENS
40
HOLD
41
BU UP/DOWN SW
(Page 23)
7-2. BLOCK DIAGRAMS
– TUNER/CD SECTION –
HCD-DX8
23
23
RESET
: FM
: CD
• Signal Path
• R-CH: Same as L-CH.
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
REC
BIAS
(L-CH)
BIAS
TRAP
TRAP
R-CH
R-CH
R CH
BIAS
OSC
BAIS B+
SWITCH
SWITCH
Q302,303
RV304
Q301
TA+12V
C332,L301
ERASE
TAPE
MECHANISM DECK
BLOCK
(TCM-230AWR11)
IC304
RV303
IC302
REC/PB SWITCH
REC
EQ
BIAS
SW
DOLBY
B
NORM
CROM
REC
LEVEL
(L-CH)
(L-CH)
RV301
REC OUT
(L)
EQ IN
(L)
EQ OUT
(L)
A IBN (L)
B IN (L)
40
1
2
3
4
48
46
A
B
70
120
PB
REC
DOL
PAS
PB OUT (L)
R IN (L)
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
BD
SECTION
MD/VIDEO
(AUDIO)
PLAYBACK LEVEL (DECK-A, L-CH)
PLAYBACK LEVEL (DECK-B, L-CH)
R-CH
L-CH
CD-L
L-CH
J101
L
R
R-CH
R-CH
HP901
(PB)
HRPE901
(REC/PB/ERASE)
L-CH
R-CH
L-CH
DECK-B
DECK-A
PB AMP
PB AMP
DECK-B
PB AMP
PB AMP
IC303
RV302
REC/PB SWITCH
CONTROL
Q304,305
17
A120/70
PB A/B
16
NORM/HIGH
18
PB AMP, REC EQ AMP,
DOLBY B NR
IC301
GRAPHIC EQUALIZER
CONTROL,
ELECTRICAL VOLUME
IC101
IN2A
40
IN2C
38
IN2D
37
INVOL OUT2
35
IN2B
39
24
VOL OUT2
DATA
21
CLOCK
22
DBFB
SWITCH
Q503
MIC
AMP
IC104
DBFB
CONT
Q101,102
5
6
7
IC102
DBFB
AMP
MUTE
Q103
Q103
MUTE
CONT
CONT
Q504,505
POWER
AMP
IC501
15
12
11
MUTE
Q581
MUTE
CONT
CONT
Q503,504
MUTE
Q862
MUTE
CONT
CONT
Q861
D841
OVER LOAD
DETECT
Q551
OVER HEAT
DETECT
Q506,506
+B
RELAY
DRIVE
Q831, 832
D502
R-CH
R-CH
OVER LOAD
DET ECT
Q821,822
PROTECT
CONT
Q823
PROTECT
SWITCH
Q828,829
RELAY
DRIVE
DRIVE
Q824,825
RY801
J631
PHONES
R CH
R CH
FAN
FAN
DRIVE
Q891,892
L
R
TM801
SPEAKER
IMPEDANS USE 6-16
Ω
69
B PLAY
68
A PLAY
93
B HALF
67
A HALF
77
PB A/B
A TRIG
DRIVE
DRIVE
REEL
DETECT
(DECK-B)
IC1002
REEL
DETECT
(DECK-A)
IC1001
CAP MOTOR
DRIVE
Q396,397
M901
(CAPSTAN)
TAPE SPEED
(NORMAL)
RV1002
TAPE SPEED
(HIGH)
R1001
MOTOR
CONTROL
Q1001
CAP MOTOR
SPEED CONT
Q395
Q393,394
B TRIG
DRIVE
DRIVE
Q391,392
A TRIG
57
B TRIG
58
A SHUT
90
B SHOT
CAP H/L
CAP M CONT
91
60
PM1001
(DECK-A)
PM1002
(DECK-B)
19
79
TC RELAY
IC401(2/2)
SYSTEM CONTROLLER
76
EQ H/N
78
ALC
75
BIAS
74
REC MUTE
73
NR ON/OFF
72
R/PB PAS
71
TC MUTE
70
AMS IN
4
DATA
5
CLK
83
DBFB ON/OFF
DC
BIAS
Q141
+6V
AUDIO +5V
S1004
(A 120/70)
AUDIO +5V
S1002 (B PLAY)
S1001 (A PLAY)
A+12V
84
LINE MUTE
100
STK MUTE
87
RELAY H
82
PROTECT
30
IIC DATA
10
XC IN
52
FREQ A
CONT A
3
2
1
12
10
5
8
7
6
4
CONT B
BOOSTER SW
L-OUT
L-OUT
RELAY
RELAY ON/OFF
TO SATELLITE AMPLIFIER (TA-DX8)
R-CH
R-OUT
PROTECT
PROTECT
STK MUTE
LINE MUTE
STANDBY LED
S MUTE
L MUTE
LED
51
FREQ B
89
BOOSTER SW
11
XC OUT
15
X IN
13
X OUT
32.768kHz
X401
16MHz
X402
BPF 0
BPF 5
P1
P35
G1
G17
FLOURESCENT
INDICATOR TUBE
DISPLAY CONTROLLER
IC601
F1
F2
FL
DRIVER
Q606-614
D611-615
D617,618
11
FUNCTION
KEY
SIRCS
IC603
97 I2C DATA
98 I2CCLOCK
VOL A
1
VOL B
2
SIRCS
100
ROTARY
ENCODER
X601
12.5MHz
+5.6V
REG
Q615
FL601
IC602
50
52
85
.
49
33
20
25
ALL BAND
26
HEADPHONE
3
S617,618,623-625,
S627,628,630-636
S627,628,630-636
10
10
5
PLAY1-3
EXIST1-3
LED
DRIVER
Q630-635
D630-632
11
GROOVE LED
12
FILE LED
13
BASS SHIFT LED
14
FUNCTION LED
15
REC/PAUSE LED
16
SURROUND LED
LED
DRIVER
Q621-626
LED
DRIVER
Q604
28
POWER LED
D601
LED
DRIVER
27
TIMER LED
TIMER
D602
VOLUME
D601
VOLTAGE SELECTOR
POWER
TRANSFORMER
230-240V
220V
120V
S951
Q605
17
12
SPEANA
BPF
6
5
4
3
+7V
KEY0
17
FUNCTION
KEY
S611-616
S619-621,626,629
KEY1
18
FUNCTION
KEY
S637-646
KEY2
19
WAKE UP
92 RESET
(AUS)
(MX)
(EXCEPT MX, AUS)
89
XIN
90
XOUT
MIC 1
J721
MIC
LEVEL
RV722
(EA)
IC722
IC722
MIC 2
J722
ECHO
LEVEL
2
6
DIGITAL
ECHO
IC721
RV721
29
IIC CLK
18
WAKE UP
7
AC CUT
T971
AC
IN
IN
F974
F975
-V
REG
+5V
REG
Q941,942
D541
-B
+B
-B
POWER
AMP
D901-904
F1
F2
1
3
+12V
REG
1
3
+9V
REG
1
3
+7V
REG
1
3
CD POWER
SWITCH
+5V
REG
1
3
IC911
Q911,912
IC951
IC921
IC961
IC931
CD D+5V
CD A+5V
RDS D+5V UNSW
AUDIO +5V
A+12V
TC A+12V
MIC A+12V
ST A+12V
TC M+9V
CD M+7V
LED +7V
D906-909
D952
D953
MIC
REG
REG
Q721
MIC B+
MIC A +12V
D822
D824
D511
EVER +5V
D508
D911
D910
85
CD POWER
RESET
12
Q501
IC501
05
T301
(Page 22)
(Page 22)
F971
R-CH
R-CH
L-OUT
DECK-A
RELAY
LED
PROTECT
S MUTE
L MUTE
IC101
SYSYTEM CONTROL
96
59
M
S1008
(A 120/70)
S1003
(A HALF)
S1005
(REC A)
S1006
(B HALF)
S1009
(REC B)
– MAIN SECTION –
HCD-DX8
24
24
05
TP (VC)
TP (FEO)
TP (TEO)
TP (FEI)
TP (AGCCON)
TP
(XPCK)
TP (RF)
CN201
1
2
A
B
C
D
E
3
4
5
6
7-3. PRINTED WIRING BOARD – BD SECTION –
• See page 21 for Circuit Boards Location.
Ref. No.
Location
IC101
C-2
IC102
D-4
IC103
B-3
Q101
A-4
• Semiconductor
Location
(Page 26)
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