Sony CX-JV77 / JAX-V77 Service Manual ▷ View online
21
CX-JV77
SECTION 5
ELECTRICAL ADJUSTMENTS
– BD49 BOARD (Conductor Side) –
TP4 (FE)
TP5 (RFAC)
TP (DVC)
TP6
(RFDC)
TP2 (TE)
Note:
Clear RF signal waveform means that the shape “
◊
” can be clearly
distinguished at the center of the waveform.
TRAVERSE LEVEL CHECK
Procedure :
1. Connect an oscilloscope to TP70 (TE) and TP73 (DVC) on
the BD49 board.
2. Press the
I
/1
button to turn the power on.
3. Load the disc (LUV-P01) and playback the number nine track.
4. Press the
4. Press the
hH
button. (Becomes the 1 track jump mode.)
5. Confirm that the level B and A (DC voltage) on the oscilloscope
waveform.
Connecting Location:
Note:
1.
CD Block is basically designed to operate without adjustment.
Therefore, check each item in order given.
Therefore, check each item in order given.
2.
Use LUV-P01 (Part No. 4-999-032-01) unless otherwise indicated.
3.
Use an oscilloscope with more than 10MW 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.
signal level is low than specified value with the following checks.
S-CURVE CHECK
Procedure :
1. Connect an oscilloscope to TP68 (FE) and TP73 (DVC) on
the BD49 board.
2. Press the
I
/1
button to turn the power on.
3. Load the disc (LUV-P01) and actuate the focus search. (In
consequence of open and close the disc tray, actuate the focus
search)
search)
4. Confirm that the oscilloscope waveform (S-curve) is
symmetrical between A and B. And confirm peak to peak level
within 2
within 2
±
0.5 Vp-p.
Note:
•
Try to measure several times to make sure than the ratio
of A : B or B : A is more than 10 : 7.
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.
brightness to obtain best waveform.
RF LEVEL CHECK
Procedure :
1. Connect an oscilloscope CH1 to TP71 (RFDC), CH2 to TP72
(RFAC) and TP73 (DVC) on the BD49 board.
2. Press the
I
/1
button to turn the power on.
3. Load the disc (LUV-P01) and playback the number nine track.
4. Confirm that oscilloscope waveform is clear and check if RF
4. Confirm that oscilloscope waveform is clear and check if RF
signal level is correct or not.
level=1.2
±
0.55Vp-p
symmetry
A (DC voltage)
center of
waveform
waveform
B
DVC
1 track jump waveform
TP70 (TE)
TP73 (DVC)
BD49 board
+
–
–
oscilloscope
RF signal waveform
VOLT/DIV : 200mV
TIME/DIV : 500ns
TIME/DIV : 500ns
level : 0.75
±
0.1Vp-p (RFDC)
1.05
±
0.3Vp-p (RFAC)
+
–
–
oscilloscope
TP71 (RFDC)
TP72 (RFAC)
BD49 board
TP73 (DVC)
symmetry
S-curve waveform
within 2
±
0.5Vp-p
A
B
+
–
–
oscilloscope
BD49 board
TP68 (FE)
TP73 (DVC)
CD SECTION
22
CX-JV77
– VMP43GY BOARD (Component Side) –
TP70
(54 MHz)
TP182
(4.2336 MHz)
TP415
(L-OUT)
TP413
(R-OUT)
VIDEO SECTION
AUDIO LEVEL, VIDEO CLOCK, AUDIO SERVO
CLOCK CHECK
CLOCK CHECK
Procedure :
1. Connect an oscilloscope to TP308 (V-OUT) on the VMP43GY
board.
2. Connect a level meter to TP415 (L-OUT) and TP413 (R-OUT)
on the VMP43GY board.
3. Connect a frequency counter to TP70 (54 MHz) and TP182
(4.2336 MHz) on the VMP43GY board.
3. Press the
I
/1
button to turn the power on.
4. Set a test disc (HLV-402 (Part No. 8-909-870-00))
5. Set to the MPEG AV TEST mode. (Refer to the CD SERVICE
5. Set to the MPEG AV TEST mode. (Refer to the CD SERVICE
MODE (See page 17))
6. The message “MPEG AV” is displayed on the flourescent
indicator tube. Color bar signal outputs and sine-wave (1 kHz
0dB) appears.
0dB) appears.
7. Confirm that the value of level meter is 2.5
±
2.0 dBs. (If audio
output disappear, press the [PRESET EQ] button, and the
message “SERVICE MODE” is displayed on the flourescent
indicator tube)
message “SERVICE MODE” is displayed on the flourescent
indicator tube)
8. Confirm that the value of frequency counter is 54 MHz
±
400
Hz.
9. Confirm that the value of frequency counter is 4,2336 MHz.
10. Change disc to a MP3 test disc (MP3 1kHz 0dB sine-wave is
10. Change disc to a MP3 test disc (MP3 1kHz 0dB sine-wave is
recorded)
11. Confirm that the value of level meter is 2.4
±
2.0 dBs.
+
–
–
level meter
VMP43GY board
TP415 (L-OUT)
TP413 (R-OUT)
VMP43GY board
TP70 (54 MHz)
TP182 (4.2336 MHz)
+
–
–
frequency counter
CX-JV77
23
23
CX-JV77
SECTION 6
DIAGRAMS
6-1. BLOCK DIAGRAM – CD SERVO Section –
FD–
FD+
6
7
8
9
16
18
11
10
12
2
1
173
137 138
140 141
142 143
4
5
7
6
23
22
14
13
16
15
DETECTOR
A
B
C
D
RF
SUMMING
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RFAC
FE
RF AMP,
FOCUS/TRACKING ERROR AMP
IC103
TE
E
F
F I-V AMP
E I-V AMP
AUTOMATIC
POWER
CONTROL
Q101
APC LD
AMP
LD
LD
PD
LASER DIODE
RFAC
164 FE
160 RFDC
162 TE
163 SE
DIGITAL SIGNAL PROCESSOR,
DIGITAL SERVO PROCESSOR
IC505 (1/2)
TO IC505 (2/2)
AUDIO/VIDEO
SECTION
MDP
133
SFDR
SFDR
SRDR
SD+
SD–
TRDR
TFDR
FRDR
FFDR
SRDR
TFDR
TRDR
FFDR
FRDR
SSTP
135
SP+
27
SP–
M102
(SPINDLE)
MOTOR
DRIVE
MOTOR
DRIVE
TD–
TD+
M
M
M101
(SLED)
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC150
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
OPTICAL PICK-UP
BLOCK
(KSM-213DHAP)
SW
PD
11
12
18
17
168
170 171
169
FILTER
FILO
PCO
CLTV
FILI
EQ
IN
IN
3
4
EQ
AC
SUM
17
FEI
RF DC
AMP
28
RFDCO
29
RFDCI
COIL
DRIVE
COIL
DRIVE
D/A1
D/A3
D/A4
D/A2
D/A
CONVERTER
IC506
• SIGNAL PATH
: CD PLAY
19
TE_BAL
FEBAL
RFAC
VCA
S101
(LIMIT)
When the optical
pick-up is inner
position
pick-up is inner
position
ON :
RFC
26
FREQUENCY
SELECT SWITCH
Q102
93
91
88
124
PCMD
BCK
LRCK
C2PO
C2PO
111
102
109
113
DATA
CLOK
XLAT
SENS
96
126
98
114
SCOR
SQSO
L SQCK
L SCLK
131
121
105
GFS
L FOK
L CDXRST
189
XTSL
6
5
3
AO5
AO4
AO3
9
AO6
D/A4
D/A2
D/A1
2
AO2
FEBAL
D/A3
MUTE
20
RST
4
CLK
DATA
LD
11
12
CLK
10
LD
DI
DATA, CLK, LD
C
SYS RST
D
15
24
2
9
RIN
LM-R
4 OUT1
2 OUT2
M751
(LOADING)
M
LOADING MOTOR DRIVE
IC701
S751
OPEN/CLOSE
DETECT
OPEN
CLOSE
LEVEL SHIFT
Q731
TABLE ADDRESS
SENSOR
IC731
ROTARY
ENCODER
S711
7
FIN
LM-F
9
RIN
TM-R
TRAY
TABLE
O/C
4 OUT1
2 OUT2
M741
(TABLE)
M
TABLE MOTOR DRIVE
IC712
7
FIN
TM-F
LM-F, LM-R,
TM-F, TM-R
A
TABLE,
TRAY, O/C
B
DISC TRAY
ADDRESS DETECT
92
90
87
123
L CDDATA
L CDBCK
L CDLRCK
L CDC2PO
L CDC2PO
110
103
108
112
L DDAT
L DCLK
L XLAT
L SENS
L SENS
95
125
99
115
L SCOR
L SQSO
SQCK
SCLK
SCLK
132
120
106
L GFS
FOK
XRST
24
GPIO9
81
SYSRST
(Page 25)
(Page 24)
(Page 24)
(Page 24)
CX-JV77
24
24
CX-JV77
6-2. BLOCK DIAGRAM – AUDIO/VIDEO CD Section –
PROGRAM ROM
IC508
• SIGNAL PATH
: CD PLAY (AUDIO)
: CD PLAY (VIDEO)
: MIC
DIGITAL FILTER,
D/A CONVERTER
IC504
MPEG VIDEO/AUDIO DECODER,
VIDEO SIGNAL ENCODER
IC505 (2/2)
7
8
VOUTL
VOUTR
1
2
3
DATA
BCK
LRCK
DRADR0 – DRADR10
DRDAT0 – DRDAT15
D0 – D15
D0 – D15
A0 – A10
A0 – A10
74
18
73 72 68
6
201
203
204
CPSIG
AUDDTO0
AUDBCK
AUDLRCK
16
MLCK
205
AUDXCLKO
14
13
15
DATA
CLK
LAT
DATA
CLK
LAT
30
29
26
GPIO14
GPIO13
GPIO11
28
GPIO12
34 – 37, 39 – 45
49 – 56, 59 – 66
23 – 26, 29 – 34, 22
A0 – A10
12 – 5, 27, 26, 31
D8 – D15
A10 – A17
23, 25, 4, 28, 29, 3, 2, 30
D0 – D7
DQ0 – DQ7
A0 – A9, A18
DQ0 – DQ15
ADDRESS BUS
DATA BUS
D-RAM
IC507
A0 – A10
13 – 15, 17 – 21
WE
24
OE
RAS
CAS
DRCAS
DRRAS
DRWEL
NVOEL
B.P.F.
LOW-PASS
FILER
IC102
IC102
70 76 77 78
DRDQM1
DRDQM0
DRBS
DRCK
13 14
GPIO1
GPIO0
15 19 18 16
GPIO3
GPIO4
GPIO5
GPIO2
• R-ch is omitted due to same as L-ch.
E
CD-L
J
CD-MUTING
C
DATA, CLK, LD
F
MIC
G
HP DET
B
TABLE,
TRAY, O/C
TRAY, O/C
R-CH
2, 4, 5, 7, 8, 10, 11, 13, 42,
44, 45, 47, 48, 50, 51, 53
16
17
20
CLK
BA0
LDQM
38
15
UDQM
39
+3.3V
REGULATOR
Q581
CD +5V
5
VDD
6
VCC
VIDEO AMP
IC307
SYNC BUFFER
Q301
6
OUT
5
OUTSAG
3
IN
2
STBY
VIDEO MUTING
CONTROL SWITCH
Q370
J310
VIDEO OUT
207
206
CLKB
CLKA
X502
27MHz
97
O-SYS-REQ
96
O-SYS-OK
95
I-SYS-CS
100
I-SYS-CLK
99
I-SYS-IN
98
O-SYS-OUT
SYSTEM CONTROLLER
IC601 (1/3)
7
O-VIDEO-MUTE
19
WFR/HP/MIC-IN
MIC +9V
150
149
XTAO
XTAI
X501
33.8688MHz
FROM IC505 (1/2)
CD SERVO
SECTION
73 I-CD NUM SENSER
20 I-CD ENCODER
21 I-CD OPEN/CLOSE
TABLE
TRAY
O/C
D
93 O-XRES
SYS-RST
MIC AMP
IC801 (1/2)
MIC AGC
Q801
MIC DETECT
Q372
MUTING
Q802
MIC AMP
IC801 (1/2)
ECHO AMP
IC802
VR801
MIC LEVEL
J802
MIC
VR802
ECHO LEVEL
+
R-CH
MUTING
Q306
MUTING
CONTROL
Q304, 305
(Page 25)
(Page 25)
(Page 23)
(Page 25)
(Page 25)
(Page 23)
(Page 23)
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