Sony MDS-JA20ES Service Manual ▷ View online
– 33 –
5-13. ERROR RATE CHECK
5-13-1. CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
1. Load a check disc (MD) TDYS-1.
A disc is loaded automatically, if pushing the tray.
2. Rotate the
[ AMS ]
knob and display “CPLAY MODE”
(C30).
3. Press the
[YES]
button twice and display “CPLAY MID”.
4. The display changes to “C =
AD =
”.
5. Check that the C1 error rate is below 20.
6. Press the
6. Press the
[MENU/NO]
button, stop playback, press the
§
button, and remove the test disc.
5-13-2. MO Error Rate Check
Checking Procedure :
1. Load a test disc (MDW-74/AU-1).
1. Load a test disc (MDW-74/AU-1).
A disc is loaded automatically, if pushing the tray.
2. Rotate the
[ AMS ]
knob and display “CPLAY MODE”
(C30).
3. Press the
[YES]
button and display “CPLAY MID”.
4. The display changes to “C =
AD =
”.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the
6. Press the
[MENU/NO]
button, stop playback, press the
§
button, and remove the test disc.
5-14. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a test disc (MDW-74/AU-1).
Checking Procedure :
1. Load a test disc (MDW-74/AU-1).
A disc is loaded automatically, if pushing the tray.
2. Rotate the
[ AMS ]
knob and display “CPLAY MODE”
(C30).
3. Press the
[YES]
button twice and display “CPLAY MID”.
4. Press the
[MENU/NO]
button when “C =
AD =
” is
displayed.
5. Rotate the
[ AMS ]
knob and display “FBIAS CHECK”
(C05).
6. Press the
[YES]
button and display “
/
c =
”.
The first four digits indicate the C1 error rate, the two digits
after [/] indicate ADER, and the 2 digits after [c =] indicate
the focus bias value.
Check that the C1 error is below 50 and ADER is below 2.
after [/] indicate ADER, and the 2 digits after [c =] indicate
the focus bias value.
Check that the C1 error is below 50 and ADER is below 2.
7. Press the
[YES]
button and display “
/
b =
”.
Check that the C1 error is below 220 and ADER is below 2.
8. Press the
[YES]
button and display “
/
a =
”.
Check that the C1 error is below 220 and ADER is below 2
9. Press the
[MENU/NO]
button, next press the
§ button, and
remove the continuously recorded disc.
Note 1:
If the C1 error and ADER are above other than the specified
value at points a (step 8. in the above) or b (step 7. in the above),
the focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
value at points a (step 8. in the above) or b (step 7. in the above),
the focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
±
≠
±
≠
±
≠
5-15. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the pickup is replaced.
If the adjustment results becomes “Adjust NG!”, the pickup may
be faulty or the servo system circuits may be abnormal.
If the adjustment results becomes “Adjust NG!”, the pickup may
be faulty or the servo system circuits may be abnormal.
5-15-1. CD Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Insert the check disc (MD) TDYS-1.
1. Insert the check disc (MD) TDYS-1.
A disc is loaded automatically, if pushing the tray.
2. Rotate the
[ AMS ]
knob to display “AG Set (CD)”
(C26).
3. When the
[YES]
button is pressed, the adjustment will be per-
formed automatically.
“Complete!!” will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to “AG Set (CD)”.
“Complete!!” will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to “AG Set (CD)”.
4. Press the
§ button to remove the disc.
5-15-2. MO Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Insert the reference disc (MDW-74/AU-1) for recording.
1. Insert the reference disc (MDW-74/AU-1) for recording.
A disc is loaded automatically, if pushing the tray.
2. Rotate the
[ AMS ]
knob to display “AG Set (MO)”
(C25).
3. When the
[YES]
button is pressed, the adjustment will be per-
formed automatically.
“Complete!!” will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to “AG Set (MO)”.
“Complete!!” will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to “AG Set (MO)”.
4. Press the
§ button to remove the disc.
±
≠
±
≠
±
≠
– 34 –
5-16. ADJUSTING POINTS AND CONNECTING POINTS
[BD Board] (SIDE A)
Note:
It is useful to use the jig. for checking the waveform. (Refer to
Servicing Notes on page 7.)
Servicing Notes on page 7.)
[BD Board] (SIDE B)
CN110
NOTE
D101
I+3V
IOP
IOP
TEO
RF
VC
GND
IC171
IC121
IC101
IC192
CN101
MDS-JA20ES
– 35 –
– 36 –
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – MD SERVO Section –
F
C
B
D
A
E
I
J
J
I
B
A
C
D
D
E
F
DETECTOR
1
2
J
I
4
5
6
7
A
B
C
D
D
8
9
E
F
LD
PD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP
(KMS-260A/J1N)
AUTOMATIC
POWER
CONTROL
Q162, 163
LASER ON
SWITCH
Q101
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
HF MODULE
SWITCH
IC103, Q102 – 104
11
10
APC
PD
LD/PD
AMP
APCREF
I-V
AMP
I-V
AMP
AT
AMP
B.P.F.
29
30
WBL
ADFM
ADIN
32
ADFG
ABCD
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
35
34
26
28
ABCD
FE
TE
SE
V-I
CONVERTER
20
F0CNT
WBL
3T
EQ
SERIAL/
PARALLEL
CONVERTER,
DECODER
COMMAND
17
16
18
SWDT
SCLK
XLAT
RF AMP
B.P.F.
46
RFO
40
RF AGC
& EQ
AGCI
EQ
38
RF
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
TEMP
48 47
MORFO
MORFI
3T
PEAK &
BOTTOM
WBL
33
AUX
63
37
PEAK
36
BOTM
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC152
6
8
OUT4F
OUT4R
M
M101
(SPINDLE)
27
25
OUT2F
OUT2R
M
M102
(SLED)
21
23
OUT1F
OUT1R
12
10
OUT3F
OUT3R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
3
4
IN4R
IN4F
29
30
IN2F
IN2R
19
18
IN1F
IN1R
14
15
IN3F
IN3R
MOD
SPFD
SPRD
92
91
88
89
86
85
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
16
PSB
PWM GENERATOR
AUTOMATIC
POWER
CONTROL
DIGITAL
SERVO
SIGNAL
PROCESS
75
66
65
67
ANALOG MUX
A/D CONVERTER
AUTO
SEQUENCER
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC121 (2/2)
RECP
AUX1
ABCD
FE
TE
SE
PEAK
BOTM
81
80
82
XLRF
CKRF
DTRF
XLAT
SCLK
SWDT
PLL
FILTER
60
59
62
61
FILI
PCO
CLTV
FILO
100
EFMO
25
ADDT
22
DATAI
512FS
OSC
IC123
IC121 (1/2)
15
TX
53
54
57
ASYO
ASYI
RFI
SCTX
HR901
OVER WRITE HEAD
ADIP
DEMODULATOR/
DECODER
78
ADFG
SPINDLE
SERVO
F0CNT
94 93
SPFD
SPRD
SUBCODE
PROCESSOR
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE
DIN0
DOUT
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER
IC121 (1/2)
DADT
INTERNAL BUS
CLOCK
GENERATOR
XBCK
LRCK
FS256
OSCI
OSCO
CPU
INTERFACE
MONITOR
CONTROL
CONTROL
10
XRST
12
DQSY
11
SQSY
14
XINT
9 8
5 6 7
SENS
SRDT
SWDT
SCLK
XLAT
1
2
3
4
MNT0
MNT1
MNT2
MNT3
FOK
SHOCK
XBUSY
SLOCK
SWDT
SCLK
SWDT
SCLK
XLATCH
53
31 33 70
67 54 52 60
MNT0 (FOK)
MNT1 (SHOCK)
MNT2 (XBUSY)
MNT3 (SLOCK)
DIG-RST
SQSY
DQSY
LDON
WR-PWR
MOD
XINT
SENS
SRDT
78
79
LDIN
LDOUT
5
6
05
2
10
4
M
IN1
IN2
OUT1 OUT2
VZ
LOADING
MOTOR DRIVE
IC400
REFERENCE
VOLTAGE SWITCH
Q400, 401
M10
(LOADING)
49, 48, 50, 51
1, 2, 18, 19
DQ1 – DQ4
34 – 31, 36 – 40, 45
6 – 9, 11 – 15, 5
A0 – A9
D0 – D3
A00 – A09
43
16
47
3
46
4
44
17
XOE
XWE
XRAS
XCAS
XOE
XWE
XRAS
XCAS
D-RAM
IC124
DIN1
SYSTEM CONTROLLER
IC800 (1/2)
74
13
64
69
79
83
12
HF MODULE
16
17
ADDT
DADT, BCK, LRCK
A
(Page 37)
DIGITAL IN
B
(Page 38)
D
512FS
(Page 37)
(Page 37)
SWDT, SCLK
F
(Page 37)
DIGITAL OUT
C
(Page 38)
E
5 20 55 32
18
56
59
SCTX 65
REFLECT
PLAY1
PROTECT
75
LD-LOW
B+
80
S102
(REFLECT/PROTECT DETECT)
68
77
LIMIT-IN
PLAY2
S101
(LIMIT IN)
76
REC
•
SIGNAL PATH
: PLAY (ANALOG OUT)
: PLAY (DIGITAL OUT)
: PLAY (DIGITAL OUT)
: REC (ANALOG IN)
: REC (DIGITAL IN)
COMPA-
RATOR
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC
ENCODER/DECODER
26
S13
(PLAY POSITION)
S12
(REC POSITION)
S11
(CHUCKING IN)
OPEN
S10
(TRAY OPEN)
28
21
20
19
29
27
24
XBCKI
23
LRCKI
58
57
HIGH REFELECT RATE/
WRITE PROTECT
LOW REFELECT RATE/
UN-PROTECT
74
MDS-JA20ES
– 37 –
– 38 –
6-2.
BLOCK DIAGRAM – MAIN Section –
05
X200
45MHz
LED DRIVE
Q756
ROTARY
ENCODER
FL DRIVE
Q781, 782
D756
STANDBY
LED DRIVE
Q754
D754
P
LED DRIVE
Q755
D755
r REC
D758
MEGA
CONTROL
LED DRIVE
Q758
D757
FILTER
LED DRIVE
Q757
D753
(
LED DRIVE
Q753
72 74
A/D CONVERTER
IC100
BUFFER
IC101
11
15
16
10
ADDT
ADDT
DADT,
BCK,
LRCK
BCK,
LRCK
INLP
VREF
VREFL
R-CH
R-CH
R-CH
BCK1
MCKI
LRCK1
12
AOUTL–
13
AOUTL+
12
INLM
INRP
INRM
16
AINL+
AINL–
(Page 36)
(Page 36)
(Page 36)
A
DIGITAL
IN
IN
B
DIGITAL
OUT
OUT
C
LINE AMP
IC103
ROTARY
ENCODER
S740
BUFFER
IC241
SIRCS
BUFFER
Q800
REMOTE CONTROL
RECEIVER
IC761
OSC
RV760
ANALOG
REC LEVEL
S740
DIGITAL
REC LEVEL
J100
RV790
PHONE
LEVEL
R-CH
R-CH
R-CH
D802
D803
LINE IN
(ANALOG)
LINE OUT
(ANALOG)
J790
PHONES
L
R
L
R
87
6
DALATCH
DA
P3
73
P2
75
P4
P1
61 62
COM24
COM23
67
1
3
88
DVOL1
DVOL0
22 21
MUTE
83
DARST
CP
CS
+5V REGULATOR
IC205
+7V REGULATOR
IC703
–7V REGULATOR
IC702
–32V
REGULATOR
IC701
+5V
REGULATOR
IC704
+3.3V
REGULATOR
IC192
+5V REGULATOR
IC102
–32V
(FL DRIVER (IC771) B–)
AC IN
AC
(TO FL781)
T701
POWER
TRANSFORMER
RY700
RELAY CIRCUIT B+
+3.3V
MD MECHANISM DECK SECTION,
DIGITAL IN/OUT CIRCUIT B+
+5V
MD MECHANISM DECK
SECTION B+
BACK UP +3.3V
SYSTEM CONTROLLER
(IC800) B+
BT701
LITHIUM
BATTERY
RECT
D706
D706
RECT
D719, 720
D806
D710
D709
D721
D805
+7V
VCC
AUDIO
CIRCUIT
–7V
RECT
D711, 712
RECT
D715 – 718
RELAY DRIVE
Q705
RELAY DRIVE
Q703
POWER DOWN
DETECT
IC801
79, 80, 1
39 – 60
3 – 37
AD1 – AD3
97, 95 – 93
KEY0 – KEY3
COM01 – COM22
SEG01 – SEG35
SEG01 – SEG35
SEG36 – SEG38
G23
G24
G01 – G22
FLUORESCENT
INDICATOR TUBE
FL781
FL/LED DRIVER
IC771
OUTPUT
INTERFACE
DECIMATION/
LOW-CUT
FILTER
DECIMATION/
LOW-CUT
FILTER
PLM & BUFFER
∆Σ
MODULATOR
∆Σ
MODULATOR
+
–
–
+
–
–
+
–
–
+
–
–
MODE
CONTROL
CLOCK
BUFFER
CLOCK
GENERATOR
1024FS
CLOCK
BUFFER
TIMING
CONTROL
+5V
A/D CONVERTER (IC100) B+
(FOR ANALOG SECTION)
+5V
A/D, D/A CONVERTER (IC100, 200) B+
(FOR DIGITAL SECTION)
LOADING MOTOR
DRIVER
(IC400) B+
SYS +3.3V
+5V
D/A CONVERTER (IC200) B+
(FOR ANALOG SECTION)
82
A1OUT
7
A1IN
D/A CONVERTER
IC200
CURRENT PULSE
IC204
2
6
29
4
41
47
43
DATA
IN1+
DADT
BCK
LRCK
BCK
LRCK
L1+
R-CH
BCK
ATT
XIN
48
64FSI
28
40
XOUT
64FSO
35
FLDATA
37
FLCLK
34
70 69 68
FLCS
2
JOG0
GND
SW
1
JOG1
92
SOURCE
91
TIMER
12
19
P.DOWN
84
STB
≠ AMS ±
PUSH ENTER
S713
S701 – 706, 711, 712,
S714, 716, 722 – 726,
S714, 716, 722 – 726,
S731 – 734
A
B
7
SHIFT
SWDT
SCLK
8
LATCH
LRCK
RMC
89 LED0
90 LED1
90 LED1
65 OSCI
C772, R772
66 OSCO
256FSO
54
128FSO
MCLKI
LVCKO
3
OVFLAG
52
25
IN1–
MIX AMP
IC243 (1/2)
LOW-PASS
FILTER
IC243 (2/2)
HEADPHONE
AMP
IC790
24
IN2+
27
IN2–
28
21
I01+
1
I02–
2
I02+
5
I01–
4
L1–
20
L2+
24
L2–
25
R1+
36
R1–
37
R2+
33
R2–
INIT
32
5
(Page 36)
D
SWDT, SCLK
(Page 36)
F
512FS
(Page 36)
E
S/P
ATT & IIR
FIR
OVERFLOW
DETECTOR
ATT & L.I.P.
NOISE
SHAPER &
REGISTER
SWITCHING
CIRCUIT
CONTROL
CIRCUIT
COAX/XOPT
OPT2/XOPT1
86 85
3
ANA5
4
SYS3.3
5
BACK
6
STBY
2
S.RESET
12
J800
S-LINK
CONTROL A1
+3.3V
S741
INPUT
S751
TIMER
1
2
56
55
19
18
•
SIGNAL PATH
: PLAY (ANALOG OUT)
: PLAY (DIGITAL OUT)
: PLAY (DIGITAL OUT)
: REC (ANALOG IN)
: REC (DIGITAL IN)
OUT
OPT1
WAVE
SHAPER
IC301
WAVE
SHAPER
IC305
OPTICAL
RECEIVER
IC303
OPTICAL
RECEIVER
IC302
OPTICAL
TRANSCEIVER
IC304
OPT1
DIGITAL IN
OPT2
DIGITAL IN
OPTICAL
DIGITAL OUT
OPT2
COAX
COAX
SEL0
SEL1
SEL0
SEL1
SEL0
SEL1
DIGITAL INPUT SELECTOR
IC300
COAXIAL
DIGITAL IN
J300
7
6
5
4
3
14
2
COAXIAL
DIGITAL OUT
J301
T301
RESET
6
5
SDA
SCL
EEPROM
IC171
XIN
SDA
SCL
XOUT
X800
7MHz
15
13
XT-IN
XT-OUT
X801
32.768kHz
10
11
61
66
4
5
REC
OFF
PLAY
ANALOG
COAX
OPT1
OPT2
SYSTEM CONTROLLER
IC800 (2/2)
REGULATOR
IC700
S.RST
DPD
RY200
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