Sony CMT-VB5 / HCD-VB5 Service Manual ▷ View online
9
CD SECTION
Note :
1. CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated.
3. Use an oscilloscope with more than 10M
3. Use an oscilloscope with more than 10M
Ω
impedance.
4. Clean the object lens by an applicator with neutral detergent
when the signal level is low than specified value with the
following checks.
following checks.
S-Curve Check
Procedure :
1. Connect oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn ?/1 button on.
5. Load a disc (YEDS-18) and actuate the focus search. (In
1. Connect oscilloscope to TP (FEO).
2. Connect between TP (FEI) and TP (VC) by lead wire.
3. Connect between TP (AGCCON) and TP (GND) by lead wire.
4. Turn ?/1 button on.
5. Load a disc (YEDS-18) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
6. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 4 ±1 Vp-p.
within 4 ±1 Vp-p.
7. After check, remove the lead wire connected in step 2 and 3.
Note :
• Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
• Take sweep time as long as possible and light up the
brightness to obtain best waveform.
RF Level Check
Procedure :
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turned ?/1 button on.
4. Load a disc (YEDS-18) and playback.
5. Confirm that oscilloscope waveform is clear and check RF signal
1. Connect oscilloscope to TP (RF).
2. Connect between TP (AGCCON) and TP (GND) by lead wire.
3. Turned ?/1 button on.
4. Load a disc (YEDS-18) and playback.
5. Confirm that oscilloscope waveform is clear and check RF signal
level is correct or not.
6. After check, remove the lead wire connected in step 2.
BD board
Oscilloscope
TP(FEO)
TP(VC)
TP(VC)
Symmetry
S-curve waveform
Wthin 4
±
1Vp-p
A
B
TP(RF)
TP(VC)
TP(VC)
BD board
Oscilloscope
Note :
Clear RF signal waveform means that the shape “
◊
” can be
clearly distinguished at the center of the waveform.
E-F Balance (1 Track jump) Check
Procedure :
1. Connect oscilloscope to TP (TEO) and TP (VC).
2. Turned ?/1 button on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the 7 button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
1. Connect oscilloscope to TP (TEO) and TP (VC).
2. Turned ?/1 button on.
3. Load a disc (YEDS-18) and playback the number five track.
4. Press the 7 button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
6. After check, remove the lead wire connected in step 1.
Adjustment Location:
[BD BOARD] (Conductor Side)
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
Level : 1.45
±
0.3Vp-p
TP(TEO)
TP(VC)
TP(VC)
BD board
Oscilloscope
Level=1.3
±
0.6 Vp-p Symmetry
A (DC voltage)
Center of
waveform
waveform
B
0 V
1 track jump waveform
Specified level:
×
100 = less than
±
22 %
B
A
TP (RF)
TP (VC)
IC103
IC101
TP (TEO)
TP (FE0)
TP (AGCCON)
TP
(GND)
(GND)
SECTION 4
ELECTRICAL ADJUSTMENTS
10
VIDEO SECTION
Frequency Adjustment
Connection:
Procedure:
1. Connect the frequency counter to check point of the VIDEO
1. Connect the frequency counter to check point of the VIDEO
board.
2. Turned ?/1 button switch on.
3. Press the FUNCTION button to select the CD.
4. Adjust CT503 on the VIDEO board so that the frequency counter
3. Press the FUNCTION button to select the CD.
4. Adjust CT503 on the VIDEO board so that the frequency counter
reading 27.0 MHz
±
80 Hz at stop status.
Adjustment Location:
[VIDEO BOARD] (SIDE A)
J301
J302
CN501
CN503
SL503
SL502
SL501
CHECK LED
CN502
IC507
(GND)
(27MHz)
CT503
VIDEO
Frequency
Adjustment
VIDEO
Frequency
Adjustment
VIDEO board
(27 MHz)
frequency counter
HCD-VB5
11
11
SECTION 5
DIAGRAMS
OPTICAL PICK-UP
BLOCK
(KSM-213D)
A
B
C
D
E
F
LD
VC
+5V
GND
PD
VR
LD
DRIVE
FOCUS
COIL
TRACKING
COIL
16
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
VO1(+)
14
VO1(-)
13
12
11
15
16
M
M102
SLED
MOTOR
17
18
M
M101
SPINDLE
MOTOR
F+
F-
T+
T-
2
OP1(+)
3
OP1(-)
5
6
27
26
23
20
STBY2
MDP
25
SRDR
30
SFDR
29
TRDR
32
TFDR
31
FRDR
34
FFDR
33
DIGITAL SIGNAL PROC.
IC101
DIGITAL SERVO
64
D OUT
RFAC
50
17
RFI
16
15
RFO
14
FE
13
TE
22
LD ON
21
HOLD SW
RFDC
43
FE
39
TE
41
SE
40
4
DATA
6
CLOK
5
XLAT
3
MUTE
76
SQSO
77
SQCK
7
SENS
26
SSTP
2
XRST
S101
LIMIT
IN SW
DEVICE RST
9
STBY1
66
PCMD
67
BCLK
65
LRCK
14
C2PO
71
XTAI
69
XTSL
LEVEL SHIFT
B
A
CD DATA
CD BCK
CD LRCK
C2PO
C
CD MECHA CONT
IC502(1/2)
30
I2C.DATA
DSP DATA
95
8
SCLK
15
SCOR
12
XRESET
XRST
DSP CLK
5
DSP LATCH
97
DSP MUTE
10
SUBQ DATA
36
SUBQ CLK
37
SENSE
1
SENSE CLK
2
SCOR
18
CTRL1
11
LDON
28
LPH
27
29
30
29
I2C.CLK
D
VO2(+)
VO2(-)
VO4(+)
VO4(-)
VO3(+)
VO3(-)
OP2(+)
OP2(-)
OP4(+)
OP4(-)
OP3(-)
A+5V
4
2
IC104
I2C-DATA
I2C-CLK
MCLK
RFE
53
54
55
52
51
50
49
66
67
70
71
5
6
2
10
FM
AM
ANTENNA
TUNER UNIT
ST-L
ST-R
ST DOUT
ST DIN
ST CLK
ST CE
TUNED
STEREO
MUTE
TUNER-L
R-CH
STDI
STDO
STDO
STCK
STCE
TUNED
STEREO
STMT
STDI
STDO
STDO
STCK
STCE
TUNED
STEREO
STMT
IC101
DIGITAL
OUT
OUT
CD
DIGITAL OUT
OPTICAL
DIGITAL OUT
OPTICAL
IC601 (1/3)
SYSTEM CONTROLLER
IC501
MOTOR DRIVER
IN1
IN2
OUT1
OUT2
M103
LOADING
MOTOR
LOADING
MOTOR
S1
LOADING
SWITCH
LOADING
SWITCH
CLOSE
OPEN
ST_DIN
ST_DOUT
ST_CLK
ST_CE
TUNED
STEREO
ST_MUTE
59
XRST
LOAD_OUT
LOAD_IN
IN_SW
OPEN_SW
M
Signal path
: FM
: CD
: CD DIGITAL OUT
R-ch is omitted due to same as L-ch.
IIC_DATA
MAIN
SECTION
(Page 13)
VIDEO
SECTION
(Page 12)
VIDEO
SECTION
(Page 12)
VIDEO
SECTION
(Page 12)
IC501
5-1. BLOCK DIAGRAM – CD SECTION –
Ver 1.1 2003.11
HCD-VB5
12
12
– VIDEO SECTION –
CD MECHA CONT
IC502(2/2)
3
RESOLUTION
4
CHROMA LEVEL
26
BGP
32
DATA1 I
31
DATA1 O
22
DF LATCH
33
CLK1
25
H SYNC IN
BUFFER
20
CL680 HINT
45
V SYNC
BUFFER
21
CL680 HSEL
23
CL680 HRDY
24
680 RESET
65
V MUTE
HD OUT
112
HD IN
119
HCK
117
H SYNC
101
V SYNC
93
HINT
114
HSEL
121
HRDY
113
RESET
60
CD DATA
4
CD BCK
3
CD LRCK
5
CD C2PO
6
MPEG VIDEO/AUDIO DEC
VIDEO SIGNAL PROC
IC505
MD
9
MC
8
ML
7
DATA
18
BCK
17
LRCK
19
384FSO
20
MCKO
4
111
110
DA DATA
DA BCK
86
DA XCLK
106
VCK IN
75
C OUT
DIGITAL FILTER
D/A CONV
IC509
108
DA LRCK
IC504
IC504
27MHz
RSTB
10
14
V OUT L
11
V OUT R
1
XT1
24
XT2
L.P.F
IC101
R-CH
X503
27MHz
X501
10MHz
E
MAIN
SECTION
(Page 13)
(Page 13)
CD-L
C
CD
SECTION
(Page 11)
(Page 11)
L.P.F
VIN
1
BGP
5
6
VOUT
C AMP
IC302
TINT
8
VIN
10
CCT
5
1
VOUT
Y AMP
IC303
69
Y OUT
B
CD
SECTION
(Page 11)
(Page 11)
CD DATA/CD BCK/CD LRCK/C2PO
D
CD
SECTION
(Page 11)
(Page 11)
DEVICE RST
S VIDEO
OUT
J301
4
3
2
1
Y IN
2
C IN
7
MUTE A
1
MUTE B
8
VIDEO AMP
IC304
15
Y OUT1
9
C OUT
12
MIX OUT1
11
MIX OUT2
14
Y OUT2
VIDEO
OUT
J302
: VIDEO
• Signal Path
• R-ch is omitted due to same as L-ch.
: CD
MD0
MD15
54
52
50
48
.
46
58
56
.
.
44
17
19
21
.
23
.
10
15
.
29
.
.
MA0
MA10
16
19
22
26
.
DQ1
DQ16
A0
A8
RAS
14
UCAS
28
LCAS
29
WE
13
DRAM
IC507
O0
O7
A0
A10
CE
22
MICROCODE ROM
IC506
12
5
27
.
26
23
.
.
17
21
25
.
4
.
13
15
.
28
29
3
.
.
2
30
.
.
.
42
RAS0
40
CAS
38
MWE
37
MCE
11
10
IC301
C
Y
7
10
31
.
34
.
2
5
.
36
39
16
77
DEVICE RESET
7
5
L.P.F
MCLK
A11
ı
A17
15
13
XIN
XOUT
Q501
Q502
Q531
+3.3V REG
+3.3V
(IC505 VDD)
+5V
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