Sony MHC-VX3 (serv.man2) Service Manual ▷ View online
HCD-VX3A
21
21
TAPE DECK SECTION
R-CH
74
CAP-M CNT 2
• Signal Path
• RCH is omitted
: PLAYBACK (DECK A)
: PLAYBACK (DECK B)
: RECORD
CAPSTAN MOTOR
CONTROL SWITCH
Q1001
R-CH
L-CH
HRP1
(PLAYBACK)
E
MAIN
SECTION
PB EQ AMP
(DECK A)
IC611
PB LEVEL (L)
(DECK A)
RV311
PB EQ AMP
(DECK A)
IC601
PB LEVEL (L)
(DECK B)
RV301
R-CH
L-CH
R-CH
HRP2 (1/2)
(RECORD/PLAYBACK)
3
1
R-CH
R-CH
4
2
REC/PB SWITCH
IC602
BIAS OSC
Q621,622
Q621,622
REC BIAS
SWITCH
Q623
BIAS
TRAP
C331,L331
REC BIAS (R)
(DECK B)
RV441
REC BIAS (L)
(DECK B)
RV341
R-CH
BIAS OSC
T621
HRP2 (2/2)
(ERASE)
A+7V
A IN (L)
48
B IN (L)
46
R IN (L)
43
ALC (L)
44
BIAS (N)
33
BIAS (C)
32
BIAS (M)
31
70
120
L.P.F
R-CH
ALC
34
35
DOLBY NR
AMP
CIRCUIT
DOLBY PASS
PB OUT (L)
40
REC EQ
AMP
REC LEVEL (L)
(DECK B)
RV301
AMS
CIRCUIT
TC L
F
MAIN
SECTION
LM ON/OFF
25
DECK PROCESSOR
DECK A/B SELECT,PB/REC EQ AMP
DOLBY NR AMP,ALC,AMS
IC301
REC-L
REC/PB/P
ASS
24
NR ON/OFF
23
RM ON/OFF
22
BIAS ON/OFF
20
NORM/HIGH
18
PB A/B
16
ALC ON/OFF
15
B NORM/CROM
19
A 120/70
17
S1004
(DECK A 120/70)
S1008
(DECK B 120/70)
77
AMS IN
B-PLA
Y SW
86
SYSTEM CONTROL
IC501 (2/3)
S1001
(DECK-A PLAY)
100
TC-RELA
Y
85
ALC-ON/OFF
84
PB -A/B
83
EQ-H/N
82
BIAS
81
REC-MUTE
80
NR-ON/OFF
79
R/P-P
ASS
78
TC-MUTE
A-PLA
Y SW
87
A-SHUT
91
A-HALF
88
B-HALF
89
S1002
(DECK-B PLAY)
S1003
(DECK-A HALF)
S1006
(DECK-B HALF)
S1005
(DECK-A REC)
S1009
(DECK-B REC)
ROTATION
DETECT SENSOR
(DECK A)
IC001
B-SHUT
90
ROTATION
DETECT SENSOR
(DECK B)
IC002
A-TRG
73
TRIGGER
PLUNGER DRIVE
(DECK A)
Q333,334
TRIGGER PLUNGER
(DECK A)
SL1
B-TRG
72
TRIGGER
PLUNGER DRIVE
(DECK B)
Q331,332
TRIGGER PLUNGER
(DECK B)
SL2
76
CAP-M H/L
TAPE SPEED
(HIGH)
RV1001
87
16
Q335
TAPE SPEED
(NORMAL)
RV1002
CAPSTAN
MOTOR DRIVE
Q336-339
75
CAP-M CNT 1
CAPSTAN
MOTOR DRIVE
Q340-343
M
M1
(CAPSTAN)
(Page 22)
(Page 22)
39
28
38
27
36
26
HCD-VX3A
22
22
MAIN SECTION
SPEAKER
IMPEDANCE
USE 6-16
Ω
MIC1
J711
MIC AMP
IC712(1/2)
MIC AMP
IC712(2/2)
MIC VOL
RV712
C
VIDEO
SECTION
(Page 19)
F
E
TAPE DECK
SECTION
(Page 21)
L
AM
VIDEO/MD
(AUDIO) IN
J101 (1/2)
R-CH
FM75
Ω
FM ANT
AM ANT
ST-L
ST-MUTE
STEREO
TUNED
ST-DIN
FM ANT
AM ANT
ST-R
ST-DOUT
ST-CLK
ST-CE
R-CH
ANTENNA
FM/AM TUNER UNIT
IN F2
64
SOUND
CONTROL
CIRCUIT
INPUT
SELECT
33
66
68
67
IN D2
IN B2
IN C2
CPU
INTERFACE
32 34
D
ATA
CLOCK
LA
TCH
60
59
14
11
KEY IN2
B OUT
GRAPHIC
EQUALIZER
CONTROL
CIRCUIT
FOUT2
REC B2
REC A2
MIC IN
2
58
30
MIC IN
L+R
57
VOLUME
CONTROL
BASS BOOST
CONTROL
CIRCUIT
VOL IN2
41
VOL OUT2
72
OUT2
36
DBFB CONTROL
SWITCH
Q111
GRAPHIC EQUALIZER CONTROL,
ELECTRICAL VOLUME
IC101
38 39
.
BB B2
BB A2
FEED BACK
SWITCH
Q112
MUTE
Q113
MUTE
Q411
MUTE
Q191
POWER AMP
IC801
14
18
R-CH
Q113
D141
D191
MUTE SWITCH
Q412
R-CH
R-CH
OVER LOAD
DETECT
Q801
RELAY DRIVE
Q431
PROTECTOR
Q435,436
OVER LOAD
DETECT SW
Q432,437
PROTECTOR
Q439
R-CH
R-CH
R-CH
R-CH
D803
DC DEFECT
SWITCH
Q433,434
R-CH
Q192
MUTE SWITCH
Q508,509
RESET SIGNAL
GENERATOR
IC502
RESET
SWITCH
Q501
3
1
+5V
RY401
L
R
TM401
J
DISPLAY
SECTION
SECTION
R-CH
SPEANA
L
R
J101 (2/2)
SUPER WOOFER
J191
PHONES
J701
SYSTEM CONTROL
IC501 (3/3)
52 55 54 53
51 50 49
7
DBFB-H/L
ST
-MUTE
STEREO
TUNED
ST
-DIN
ST
-DOUT
ST
-CLK
ST
-CE
65 63 61 60
DISC-SENS
T-SENS
TBL-L
TBL-R
67 66
LOAD-OUT
LOAD-IN
68
ENC3
70 69
ENC2
ENC1
71
OUT
-OPEN
59
XRST
47
M62493-DA
TA
48 38
M62493-CLK
M62493-LA
TCH
BY
-P
ASS
L+R/L-R
6
LINE-MUTE
22
AC-CUT
12
RESET
13
X OUT
36
R
Y
-SW
3
F-RELA
Y
27
PROTECTOR IN
I
DISPLAY
SECTION
SECTION
G
DISPLAY
SECTION
SECTION
RESET
• Signal Path
• RCH is omitted
: TAPE PLAY
: RECORD
: CD PLAY
: TUNER (FM/AM)
: MIC INPUT
16
15
X IN
30
IIC-DA
TA
11
XC OUT
10
XC IN
X613
16MHz
X601
32.768kHz
29
IIC-CLK
2
POWER
5
CD-POWER
H
POWER
CD-POWER
POWER
SECTION
VIDEO/MD
(REC OUT)
R
1
STK-MUTE
MUTE SWITCH
Q803,804,865
TAPE DECK
SECTION
(Page 21)
(Page 23)
D
VIDEO
SECTION
(Page 20)
(Page 23)
(Page 23)
(Page 23)
42
2
3
SURROUND AMP
IC1201
41
40
XRST
I
2
C.CLK
I
2
C.DATA
I
2
C.CLK
I
2
C.DATA
T. SENS
OPEN
TBL.L
TBL.R
DISC SENS
ENC 1
ENC 2
ENC 3
LOAD IN
LOAD OUT
B
CD
SECTION
(Page 19)
HCD-VX3A
23
23
DIPLAY/KEY/POWER SECTION
G
I
MAIN
SECTION
J
RESET
SPEANA
SDA
78
SCL
79
73
DATA
CLK
17
F01
LINE IN
4
BAND-PASS FILTER
IC603
13
L+R
16
F02
15
F03
14
F04
JOG-A
80
FUNCTION
KEY
BPF1
14
ALL BAND
18
BPF2
15
BPF3
16
BPF4
17
REMOTE CONTROL
RECEIVER
IC602
S631-663
S751-757
2
ROTARY
ENCODER
S601
ROTARY
ENCODER
S602
S601
(JOG DIAL)
S602
VOLUME
VOL-A
9
SIRCS
1
KEY-0
KEY-2
JOG-A
8
VOL-A
10
FLUORESCENT INDICATOR TUBE DRIVE
LED DRIVE,KEY CONTROL
IC601
RESET
ANODE 0
ANODE 23
SWITCH
Q620
41
GRID0
GRID1
GRID11
SWITCH
Q621
39
GRID12
FLUORESCENT
INDICATOR TUBE
FLC601
F1
F1
F2
7
L.SEL
Q603
B+ SWITCH
Q601,602
D+5V
LED DRIVE
Q611-617
LED
LED
D751-753
LED DRIVE
Q604
74
STBY
D754
PWR STBY
LED DRIVE
Q605
75
TMR SELECT
D626
TIMER
X-O
72
X-I
70
X601
12.5MHz
D611-625
+7V
REGULATOR
Q901,902,913
SWITCH
Q870
D832
D831
F953
POWER
AMP
IC801
+VH
+VH
-VH
+VL
-VL
VP
VF
F955
F956
F954
R951
R952
T952
D901-904
-7V
REGULATOR
Q9144,951,952
+5V
REGULATOR
IC902
1
3
B+
SWITCH
Q904,905
+7V
-7V
CD D+5V
CD A+5V
+5V (STBY)
D501
D502
µ
CON +B
µ
CON +B
D912
AUDIO D+5V
D507
D+5V (UNSW)
D907-910
R953
+12V
REGULATOR
IC903
1
3
B+
SWITCH
Q909
ST 10V
TC M+12V
CD M+7V
+7V
REGULATOR
IC901
1
3
+5V
REGULATOR
IC904
1
3
B+
SWITCH
Q911,912
H
MAIN
SECTION
CD-POWER
POWER
JW256
VOLTAGE
SELECTOR
AC IN
VS901
220/240V
120V
F951
REGULATOR
CONTROL SW
Q903,923
16
(Page 22)
MAIN
SECTION
(Page 22)
MAIN
SECTION
(Page 22)
(Page 22)
I
2
C.CLK
I
2
C.DATA
13
11
19
21
5
4
6
.
67
.
66
22
2
.
.
.
65
.
.
28
38
40
42
64
.
EXCEPT TH MODEL
EXCEPT TH MODEL
TH MODEL
D918
HCD-VX3A
24
24
IC101
@∞
MDP
1
2
3
4
Waveforms
CD SECTION
CD SECTION
IC101
%º
RFAC
IC101
$¡
TE
IC101
#ª
FE
1.3Vp-p
APPROX 500mVp-p
2.5V
APPROX 200mVp-p
2.5V
2.6Vp-p
7.5
µ
sec
1
2
3
IC505
&∞
COUT
IC505
^ª
YOUT
4
5
6
7
8
9
IC509
!¶
BCLK
IC509
!ª
LRCK
0
!¡
!™
IC502
!£
XOUT
4Vp-p
10MHz
IC401
7
COUT
IC401
1
YOUT
J302 VOUT
IC509
1
XT1
27MHz
5.8Vp-p
4.6Vp-p
44.1kHz
4.8Vp-p
2.11MHz
IC504
8
384FS
4.8Vp-p
33.8MHz
IC504
6
27M
3.8Vp-p
27MHz
2.8Vp-p
33.8MHz
IC504
!™
VIDEO SECTION
H
1Vp-p
H
1Vp-p
2Vp-p
H
2Vp-p
H
H
1.2
Vp-p
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• 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.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
For printed wiring boards.
Note:
• X
: parts extracted from the component side.
• Y
: parts extracted from the conductor side.
•
p
: parts mounted on the conductor side.
•
®
: Through hole.
• b
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
• 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
g
: VIDEO/MD
E
: PB (DECK A)
d
: PB (DECK B)
G
: REC (DECK B)
m
: CHROMA
n
: Y
o
: VIDEO
J
: CD
c
: digital out
• Abbreviation
EA
: Saudi Arabia model
MY
: Malaysia model
SP
: Singapore model
IA
: Indonesia model
TH
: Thai model
TW
: Taiwan model
JE
: Tourist model
Note: The components identified by mark
!
or dotted line
with mark
!
are critical for safety.
Replace only with part number specified.
• Indication of transistor
C
These are omitted
E
B
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side: Parts on the parts face side seen from the
(Side A)
(Side A)
parts face are indicated.
Q
C
These are omitted
E
B
PANEL SECTION
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