Sony MHC-VX3 (serv.man2) Service Manual ▷ View online
17
VIDEO SECTION
Frequency adjustment
1.
Connect the frequency counter to check point of the VIDEO
board.
board.
2.
Adjust CT503 of the VIDEO board so that the frequency
counter read 27MHz ± 80Hz at STOP condition.
counter read 27MHz ± 80Hz at STOP condition.
[ VIDEO BOARD ] – SIDE B –
Adjustment Location :
[ VIDEO BOARD ] – SIDE A –
frequency counter
VIDEO board
(27 MHz)
(27 MHz)
+
–
–
SL501
IC502
IC506
(27MHz)
(GND)
SL502
SL503
TEST
MODE
SL501
D502
SL502
CT503
SL503
TEST MODE
VIDEO
FREQUENCY
(27MHz)
(GND)
IC507
IC505
Adjustment Location :
[ BD BOARD ] — SIDE B —
TP
(VC)
(VC)
TP
(RF)
(RF)
TP
(TE)
(TE)
TP
(IOP)
(IOP)
TP
(FE)
(FE)
TP
(AGCCON)
(AGCCON)
18
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARD LOCATION
AC SEC board
CD SW board
ST-BY board
PANEL board
MAIN board
TUNER UNIT
VIDEO board
SENSOR board
MOTOR (TURN) board
MOTOR (SLIDE) board
BD board
LEAF SW board
AUDIO board
CONNECTOR board
HCD-VX3A
19
19
7-2. BLOCK DIAGRAMS CD SECTION
E
F
A
B
C
D
DRIVE
Q101
LD
RF EQ
AMP
RF
SUMMING
AMP
FOCUS
ERROR
AMP
TRACKING
ERROR
AMP
APC LD
AMP
VC
BUFFER
VC
REF
RF AMP
IC103
DIGITAL SERVO
DIGITAL SIGNAL PRCESSOR
IC101
IC381
LASER
DIODE
DETECTOR
OPTICAL PICK-UP BLOCK
(KSS-213D/Q-RP)
A
C
D
B
E
F
LD
POWER
PD
LD
PD
LD
A
C
D
B
E
F
TE
FE
RFO
RFI
ASYMMETRY
CORRECTION
CORRECTION
SERVO
AUTO
SEQUENCER
INTEG-
RATOR
RATOR
DIGITAL
PLL
EFM
DEMODULATOR
REGISTER
SUB CODE
PROCESSOR
ERROR
CORRECTOR
DATA BUS
32K
RAM
D/A
INTERFACE
CD DIGITAL
OUT
OPTICAL
DIGITAL
OUT
DOUT
SERVO
INTERFACE
DIGITAL
CLV
LD ON
OP AMP
ANALOG SW
A/D
CONVERTER
TRACKING
PWM
GENERATOR
FOCUS
PWM
GENERATOR
SLED
PWM
PWM
GENERATOR
PWM
GENERATOR
VC
TRACKING
SERVO
FOCUS
SERVO
SERVO
SLED
SERVO
SERVO DSP
TFDR
TRDR
FFDR
FRDR
SFDR
SRDR
MDP
DETECTOR
MIRR
DFCT
FOK
D OUT
PCM-D
S STOP
RFDC
FE
TE
CE
VC
SE
CPU
INTERFACE
SENS
DATA
XLAT
CLOK
CLOCK
GENERATOR
XTAI
XTSL
M
M
TRACKING
COIL
FOCUS
COIL
SLED
MOTOR
M102
SPINDLE
MOTOR
M101
T+
T
F+
F
SD+
SD
SP+
SP
FOCUS/TRACKING COIL DRIVE
SPINDLE/SLED MOTOR DRIVE
IC102
VC
TFDR
TRDR
FFDR
FRDR
SFDR
SRDR
XRST
MUTE
16
S101
LIMIT SW
SQCK
A+5V
IC104
XRST
ADATA
BCLK
LRCK
MCK
SENS
CTRL1
DATA
SCLK
SCLK
XLT
CLK
SCOR
SQSO
SCOR
SUBQ
SQCK
LPH
XRST
LD ON
LRCK
BCLK
C2PO
MUTE
MUTE
C2PO
RF AC
ASYI
ASYO
CONTROL
SIGNAL
BLOCK
SERVO
BLOCK
BLOCK
VCC
VC
: VIDEO
VIDEO
SECTION
(Page 20)
MAIN
SECTION
(Page 22)
M
TABLE SENSOR
IC702
T. SENS
OPEN
S801
OPEN/CLOSE
DET
OUT1
IN1
IN2
OUT2
M
M701
TURN
TURN
MOTOR
TBL.L
TBL.R
DISC SENSOR
IC703
ROTARY
ENCODER
S811
Q701
DISC SENS
ENC 1
ENC 2
ENC 3
ENC 2
ENC 3
M801
SLIDE
MOTOR
OUT2
OUT1
OUT1
RIN
FIN
SLIDE
MOTOR DRIVER
IC801
TURN
MOTOR DRIVER
IC701
LOAD IN
LOAD OUT
A
B
(XTAL 33.8MHz)
4
2
5
7
8
6
11
10
3
4
23
24
27
25
20
22
21
12
13
17
14
16
50
48
49
43
38
41
39
40
42
32
31
34
33
30
29
25
64
67
66
14
65
71
3
7
69
15
6
5
4
77
76
8
26
6
3
82
10
2
2
7
7
4
1
12
11
14
13
17
18
15
16
3
2
6
5
INTEG-
RATOR
RATOR
• SIGNAL PATH
: CD
: Digital out
HCD-VX3A
20
20
VIDEO SECTION
SYSTEM
SELECT
S501
65
15
13
16
29
I
2
C.CLK
30
I
2
C.DATA
XRESET
TEST LED
NT/PAL
XOUT
+5V
D502
A7
DF LATCH
SHARPNESS
XIN
24
45
BUS
DSP DATA
DSP LATCH
SENSE CLK
DSP CLK
SENSE
DSP MUTE
CTRL1(L:DOUBLE)
CTRL2
LDON
SCOR
SUBQ DATA
22
34
X501
NTSC
AUTO
PAL
10MHz
X503
27MHz
MECHA. CONTROL
IC502
LEVEL SHIFT
IC504
LEVEL SHIFT
IC501
D-RAM
IC507
ROM
IC506
AMP
IC101
OUTPUT AMP
IC401
VIDEO/CD DECODER
IC505
DIGITAL FILTER & D/A CONVERTER
IC509
DATA1O
DATA1I
CLK1
CL680 INT
DATA0
DATAI
CLK1
DATAI
CLK1
ADATA
BCLK
LRCK
C2P0
DATA
XLT
CLK
SENS
SCLK
MUTE
CTRL1
CTRL2
LDON
SCOR
SUBQ
SQCK
XRST
MCK
A
CD
SECTION
(Page 19)
SUBQ CLK
DEVICE RESET
23
93
73
12
3
4
5
1
2
10
11
27
28
18
37
36
77
20
21
33
32
31
69
HD-OUT
6
CD-C2P0
CD-LRCK
CD-BCK
HRDY
HD-IN
HCK
HINT
HSEL
RESET
PGIO2/VSYNC/CSYNC
INVERTER
Q502
CD-DATA
MWE
WE
RAS
UCAS
LCAS
A0
A8
DQ1
DQ16
RASO
CAS
MCE
MD0
MD15
MA10
MA0
C-OUT
Y-OUT
75
DA-DATA
DA-BCK 111
VCK-IN 106
DA-XCLK 86
110
DA-LRCK 108
112
119
117
113
114
121
93
60
3
5
5
4
13 14 28 29
38 42
40
10
8
4
13
5
1
1
3
7
5
1
3
19
17
DATA0
CLK1
8
7
10
20
4
11
18
MODE
PLM
D/A
CONV
CLOCK
DIVIDER
9
24
1
16-19•22-26
2-5•7-10•31-34•36-39
O0
O7
A11
A17
A0
A10
CE
13-15•17-21
25•4•28•29•3•2•30
12-5•27•26•23
58-56•54•52-50•48•46-44
10-15•17•19•21•23-29
22
37
MUTE
Q454
BUFFER
Q301
MUTE
Q453
MIX AMP
Q308,310
BUFFER
Q303,304
TRAP
Q302,306,307
1
3
2
4
14
VIDEO OUT
J302
J301
VIDEO
FREQUENCY
CT503
L - CH
R-CH
XRST
27MHz
384FS
768FS
S VIDEO
OUT
OUT
DATAI
DATAO
CLK1
CLK1
HRDY
INT
HSEL
INT
HSEL
RST
CLK1, DATA0
(XTAL 33.8MHz)
RSTB
3.3V REG
Q531
+3.3V
D5V
: VIDEO
• R CH is omitted
• SIGNAL PATH
• SIGNAL PATH
: CD
: Y
: CHROMA
MAIN
SECTION
(Page 22)
C
MAIN
SECTION
(Page 22)
D
I
2
C.CLK
I
2
C.DATA
680 RESET
CL680 HRDY
CL680 HSEL
RESET
HRDY
HSEL
INT
11
1
3
8
12
6
21
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