Sony HCD-VR50 / HCD-VR50XR / HCD-VR70 / LBT-VR50 / LBT-VR50R Service Manual ▷ View online
HCD-VR50/VR70
– 17 –
– 18 –
SECTION 7
DIAGRAMS
7-1. CIRCUIT BOARDS LOCATION
TUNER UNIT
VIDEO board
JACK board
TC-B board
TC-A board
PANEL FL board
PANEL VR board
FRONT INPUT board
TRANS board
MAIN board
PA board
CD-L board
CD-R board
LED (PANEL) board
DOOR SWITCH board
BD board
LED (CD) board
CD MOTOR board
TABLE SENSOR board
AUDIO board
LEAF SW board
TUNER UNIT is supplied
as the assembled block.
as the assembled block.
VIDEO SECTION
Frequency adjustment
1. Connect the frequency counter to check point of the VIDEO
board.
2. Adjust CT503 of the VIDEO board so that the frequency 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)
HCD-VR50/VR70
– 19 –
– 20 –
7-2. BLOCK DIAGRAMS
– BD SECTION –
E
F
A
B
C
D
DRIVE
Q101
LD
RF EQ
AMP
SUMMING
AMP
RF
ERROR
AMP
FOCUS
ERROR
AMP
TRACKING
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-NP)
A
C
D
B
E
F
LD
POWER
PD
LD
PD
LD
A
C
D
B
E
F
TE
FE
RFD
RFI
ASYMMETRY
CORRECTION
AUTO
SEQUENCER
SERVO
INTEG-
RATOR
DIGITAL
PLL
EFM
DEMODULATOR
REGISTER
SUB CODE
PROCESSOR
ERROR
CORRECTOR
DATA BUS
32K
RAM
D/A
INTERFACE
DIGITAL
CD DIGITAL
OUT
OPTICAL
OUT
DOUT
SERVO
INTERFACE
DIGITAL
CLV
LD ON
OP AMP
ANALOG SW
A/D
CONVERTER
PWM
GENERATOR
TRACKING
PWM
GENERATOR
FOCUS
PWM
GENERATOR
SLED
PWM
GENERATOR
VC
TRACKING
SERVO
FOCUS
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
09
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
D+5V
MD2
RF AC
ASYI
ASYO
CONTROL SIGNAL
BLOCK
SERVO
BLOCK
VCC
VC
VIDEO
SECTION
• SIGNAL PATH
: CD
: VIDEO
(Page 27)
MAIN
SECTION (2/2)
(Page 25)
TABLE
SENSOR
IC702
T. SENS
OUT1
IN1
IN2
OUT2
M
M701
TURN
TURN
MOTOR
TBL.L
TBL.R
TURN
MOTOR DRIVER
IC701
DISC
SENSOR
IC703
ROTARY
ENCODER
S811
Q701
DISC SENS
ENC 2
ENC 3
ENC 3
A
C
(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
63
67
66
14
65
71
3
7
69
15
6
5
4
77
76
8
26
6
3
82
2
7
1
12
11
14
13
17
18
15
16
3
2
6
5
INTEG-
RATOR
HCD-VR50/VR70
– DECK SECTION –
– 21 –
– 22 –
IC611
R CH
HP101
PB HEAD
(DECK A)
(DECK A)
L
R
RV311
PLAYBACK
LEVEL
DECK A
IC601
R CH
L
R
RV301
PLAYBACK
LEVEL
DECK B
3
1
IC602
4
REC/PB
EQOUT
REC BIAS
BIAS OSC
T621, Q621, 622
ERASE HEAD
ERASE BIAS
46
48
B IN
A IN
16
PB-A/B
EQIN
38
36
RV301
REC LEVEL
39
RECOUT
BIAS SW
D
M
70
120
DOLBY
TYPE B
TYPE B
+7.5V
Q623
LIN
43
PB
24
18
20
22
40
25
PB OUT
LM ON/
OFF
BIAS ON/OFF
RM ON/OFF
ALC ON/OFF
TC PB L
TC REC L
PB A/B
NORM/HIGH
REC/PB/PASS
BIAS ON/OFF
RM ON/OFF
15
ALC ON/OFF
RELAY
09
B
MAIN
SECTION (1/2), (2/2)
LM ON/OFF
NORM/
HIGH
PAS
DOL
P
R
REC/PB HEAD
(DECK B)
X
DOLBY NR
IC301
IC301
DOLBY NR
HRPE101
RV341
REC
BIAS
32
23
NR ON/
OFF
NR ON/OFF
17
S1004
A CrO
2
S1008
B CrO
2
19
A 120/70 B NORM/CROM/
METAL
M
CAP MOTOR
CONTROL
Q336-343
CONTROL
Q336-343
SPEED
CONTROL
Q1001
SWITCH
Q335
RV1001
HIGH
SPEED
RV1002
NORMAL
SPEED
M1
CAPSTAN
MOTOR
CAPM CNT2
CAP M H / L
CAPM CNT1
REEL
DETECT
IC1001
A SHUT
B SHUT
REEL
DETECT
IC1002
S1001 (A PLAY)
+5V
S1002 (B PLAY)
A PLAY
B PLAY
A HALF
B HALF/REC A/REC B
S1003
(A HALF)
+5V
+5V
S1005
(REC A)
S1006
(B HALF)
S1009
(REC B)
(Page 23, 24, 25)
• R CH : Same as L ch
• SIGNAL PATH
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
• SIGNAL PATH
: PB (DECK A)
: PB (DECK B)
: REC (DECK B)
R CH
CN301
3
1
28 27
26
MS
MS OUT
B TRIG
A TRIG
TRIGGER
MOTOR
CONTROL
Q331-334
MOTOR
CONTROL
Q331-334
A DECK/
B DECK
PLUNGER
B DECK
PLUNGER
• PLUNGER SOLENOID is supplied
as the MECHANICAL BLOCK ASSY.
as the MECHANICAL BLOCK ASSY.
31, 33
HCD-VR50/VR70
– 23 –
– 24 –
– MAIN (1/2) SECTION –
SPEANA
MD OUT
(L)
J701
L-CH SIG
BBA2
BUS OUT2
REC B2
REC A2
BBB2
VD OUT
1
8
VIDEO 1
IN
IN4
IN3
IN1
J702
10
2
3
5
C
B
A
VCD VIDEO
46
45
28
X
12
14
VIDEO 1
(L IN)
X1
X0
J701
13
10
9
B
A
VIDEO 2
(L IN)
J804
09
46
45
IC181 SELECTOR
IC191
AV SWITCH
PHONO
(L IN)
J701
VIDEO
SECTION
TC PB L
MD IN
(L)
MD (L IN)
69
68
66
IN D2
IN B2
IN A2
IC101
SOUND PROCESSOR 1
IC601 (1/2)
PHONO AMP
65
2
67
IN C2
MIC IN
IN E2
64 IN F2
MUTE
SWITCH
Q803
MAIN CONTROL
IC501 (1/2)
6
3
LINE-MUTE
F-RELAY
7
28
34
38
44
47
45
DBFB-H/L
V-MUTE
SW-MODE
493-LAT
BASS FREQ
493-DATA
FUNC-SEL1
22
1
3
AC-CUT
46
FUNC-SEL0
48
493-MUTE
RESET
7
28
34
38
44
47
45
46
46
48
RESET
SWITCH
Q801
12
RESET
D805
EVER+5V
44
34
37
BUF IN2
SWITCH
Q114
SWITCH
Q115
7
(TA-MUTE)
SWITCH
Q111
SWITCH
Q112
57
36
39
38
58
L+R
30
MUTE
SWITCH
Q113
VIDEO
OUT
J702
TC REC L
DECK
SECTION
POWER
SECTION
MIC-SIG
ST-L
CD-L
J701
B
(Page 22)
VIDEO
SECTION
O
(Page 28)
M
(Page 25)
C
(Page 30)
DECK
SECTION
B
(Page 22)
POWER
SECTION
E
(Page 29)
DISPLAY
SECTION
D
(Page 31)
TC REC L
6
VIDEO 2
IN
J804
3
1
DISPLAY
SECTION
F
(Page 31)
F-RELAY
POWER
SECTION
G
(Page 29)
• R CH: Same as L ch
• SIGNAL PATH
: FM
: CD
: PB
: REC
: VIDEO/MD
• SIGNAL PATH
: FM
: CD
: PB
: REC
: VIDEO/MD
FM/AM TUNER
TUNER UNIT IS
SUPPLED AS THE
ASSEMBLED
BLOCK
TUNER UNIT IS
SUPPLED AS THE
ASSEMBLED
BLOCK
RESET
IC801
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