Sony MDS-JB930 Service Manual ▷ View online
29
13. ERROR RATE CHECK
13-1. CD Error Rate Check
Checking Procedure :
1. Load the check disc (MD) TDYS-1.
2. Turn the
1. Load the check disc (MD) TDYS-1.
2. Turn 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 to stop playback, then press the
[EJECT ]
button and take out the check disc.
13-2. MO Error Rate Check
Checking Procedure :
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
ING CONTINUOUSLY-RECORDED DISC”)
2. Turn the
[ AMS ]
knob to display “CPLAY MODE”
(C30).
3. Press the
[YES]
button to display “CPLAY MID”.
4. The display changes to “C1 =
AD =
”.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the
6. Press the
[MENU/NO]
button to stop playback, then press the
[EJECT ]
button and take out the test disc.
14. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
1. Load the continuously-recorded disc. (Refer to “5. CREAT-
ING CONTINUOUSLY-RECORDED DISC”)
2. Turn the
[ AMS ]
knob to display “CPLAY MODE”
(C30).
3. Press the
[YES]
button twice to display “CPLAY MID”.
4. Press the
[MENU/NO]
button when “C =
AD =
” is
displayed.
5. Turn the
[ AMS ]
knob to display “FBIAS CHECK”
(C05).
6. Press the
[YES]
button to 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 about 200 and ADER is below 2.
8. Press the
[YES]
button and display “
/
a =
”.
Check that the C1 error is about 200 and ADER is below 2
9. Press the
[MENU/NO]
button, then press the
[EJECT ]
but-
ton and take out the 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.
§
±
≠
§
±
≠
±
≠
§
15. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the optical pick-up is
replaced.
If the adjustment results becomes “Adjust NG!”, the optical pick-
up may be faulty or the servo system circuits may be abnormal.
replaced.
If the adjustment results becomes “Adjust NG!”, the optical pick-
up may be faulty or the servo system circuits may be abnormal.
15-1. CD Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Load the check disc (MD) TDYS-1.
2. Turn the
1. Load the check disc (MD) TDYS-1.
2. Turn 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
[EJECT ]
button and take out the check disc.
15-2. MO Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Load the test disc (MDW-74/AU-1).
2. Turn the
1. Load the test disc (MDW-74/AU-1).
2. Turn 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
[EJECT ]
button and take out the test disc.
§
§
±
≠
±
≠
±
≠
30
CN110
NOTE
D101
I+3V
IOP
IOP
TEO
RF
VC
RF
VC
GND
IC171
IC121
IC101
IC192
CN101
Note:
It is useful to use the jig for checking the waveform. (Refer to Ser-
vicing Notes on page 6)
vicing Notes on page 6)
– BD BOARD (Side B) –
Adjustment Location:
– BD BOARD (Side A) –
31
31
F
C
B
D
A
E
I
J
J
I
B
A
C
D
E
F
DETECTOR
J
I
A
B
C
D
D
E
F
LD
PD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP
(KMS-260A/J1N)
AUTOMATIC
POWER CONTROL
Q162, 163
APC
PD
APCREF
AT
AMP
B.P.F.
WBL
ADFM
ADIN
ADFG
ABCD
AMP
ABCD
FE
TE
SE
F0CNT
WBL
3T
EQ
COMMAND
SWDT
SCLK
XLAT
RFO
RF AGC
& EQ
AGCI
EQ
RF
RF AMP,
FOCUS/TRACKING ERROR AMP
IC101
TEMP
MORFO
MORFI
3T
WBL
AUX
PEAK
BOTM
FOCUS/TRACKING COIL DRIVE,
SPINDLE/SLED MOTOR DRIVE
IC152
OUT4F
OUT4R
M101
(SPINDLE)
OUT2F
OUT2R
M102
(SLED)
OUT1F
OUT1R
OUT3F
OUT3R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
IN4R
IN4F
IN2F
IN2R
IN1F
IN1R
IN3F
IN3R
MOD
SPFD
SPRD
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
PSB
PWM GENERATOR
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC121 (2/2)
RECP
AUX1
ABCD
FE
TE
SE
PEAK
BOTM
XLRF
CKRF
DTRF
XLAT
SCLK
SWDT
FILI
PCO
CLTV
FILO
EFMO
ADDT
DATAI
DIVIDER
IC123
IC121 (1/2)
TX
ASYO
ASYI
RFI
SCTX
HR901
OVER WRITE HEAD
ADFG
F0CNT
SPFD
SPRD
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)
INTERNAL BUS
DADT
XBCK
LRCK
FS256
OSCI
OSCO
DQSY
SQSY
XINT
SENS
SRDT
SWDT
SCLK
XLAT
MNT0
MNT1
MNT2
MNT3
FOK
SHOCK
XBUSY
SLOCK
SWDT
SCLK
SWDT
SCLK
XLATCH
MNT0 (FOK)
MNT1 (SHOCK)
MNT2 (XBUSY)
MNT3 (SLOCK)
DIG-RST
SQSY
DQSY
LDON
WR-PWR
MOD
XINT
SENS
SRDT
LDIN
LDOUT
05
IN1
IN2
OUT1
OUT2
VZ
LOADING
MOTOR DRIVE
IC400
M103
(LOADING)
DQ1 – DQ4
A0 – A9
D0 – D3
A00 – A09
XOE
XWE
XRAS
XCAS
XOE
XWE
XRAS
XCAS
D-RAM
IC124
DIN1
SYSTEM CONTROLLER
IC800 (1/2)
HF MODULE
ADDT
DADT, BCK, LRCK
(Page 32)
512FS
(Page 32)
(Page 32)
SWDT, SCLK
(Page 32)
SCTX
COAX/XOPT
OPT2/XOPT1
SEL1
SEL0
REFLECT
PROTECT
LD-LOW
UNREG
+12V
80
LIMIT-IN
REC-P
S101
(LIMIT IN)
PACK-OUT
•
SIGNAL PATH
: PLAY (ANALOG OUT)
: PLAY (DIGITAL OUT)
: PLAY (DIGITAL OUT)
: REC (ANALOG IN)
: REC (DIGITAL IN)
S601
(REC POSITION)
S602
(PACK OUT)
PB-P
S604
(PLAY POSITION)
XBCKI
LRCKI
S102
(REFLECT/PROTECT DETECT)
HIGH REFELECT RATE/
WRITE PROTECT
LOW REFELECT RATE/
UN-PROTECT
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
OUT
OPT1
WAVE
SHAPER
IC301
OPTICAL
RECEIVER
IC303
OPTICAL
RECEIVER
IC302
DIGITAL
OPTICAL IN 1
DIGITAL
OPTICAL IN2
OPT2
COAX
COAX
SEL0
SEL1
DIGITAL INPUT SELECTOR
IC300
DIGITAL
COAXIAL IN
J300
WAVE
SHAPER
IC305
OPTICAL
TRANSCEIVER
IC304
DIGITAL
OPTICAL OUT
DIGITAL
COAXIAL OUT
J301
T301
11
9
8
4
1
2
48
47
46
40
33
38
37
36
32
35
34
26
28
18
17
16
20
12
30
29
5
6
7
10
LASER ON
SWITCH
Q101
LD/PD
AMP
I-V
AMP
I-V
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RF AMP
B.P.F.
PEAK &
BOTTOM
6
8
92
91
88
89
86
85
81
80
83
13
67 65 66 75 74 63 64
82
27
25
21
23
12
10
14
15
19
18
29
30
3
4
16
M
M
M
AUTOMATIC
POWER
CONTROL
DIGITAL SERVO
SIGNAL
PROCESS
ANALOG MUX
A/D CONVERTER
SERIAL/PARALLEL
CONVERTER,
DECODER
AUTO
SEQUENCER
V-I
CONVERTER
HF MODULE
SWITCH
IC103, Q102 – 104
100
60
59
62
61
53
54
57
78
79
94 93
10
12 11
14
9
8
5 6 7
1 2 3 4
43
47
16
29
27
28
26
21
20
19
23
24
22
25
7
14 2
4
3
5
6
17
46
44
16
3
4
17
15
ADIP
DEMODULATOR/
DECODER
SPINDLE
SERVO
COMPA-
RATOR
PLL
FILTER
SUBCODE
PROCESSOR
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC
ENCODER/DECODER
CPU
INTERFACE
MONITOR
CONTROL
CONTROL
18
56
53
59
69
5
23
55 32
33 70
67 54 52 60
31
XRST
CLOCK
GENERATOR
49, 48, 50, 51
1, 2, 18, 19
34 – 31, 36 – 40, 45
6 – 9, 11 – 15, 5
C
D
B
A
78 79
5
6
4
2
10
68
77
76
74
57
58
86
85
65
M
REFERENCE
VOLTAGE SWITCH
Q400, 401
MDS-JB930
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – SERVO Section –
32
32
05
X200
45MHz
LED DRIVE
Q756
ROTARY
ENCODER
FL DRIVE
Q781, 782
D756
STANDBY
D757
FILTER
LED DRIVE
Q757
A/D CONVERTER
IC100
SDTO
ADDT
DADT, BCK, LRCK
AINL
R-CH
R-CH
BICK
LRCK
CDTI
CCLK
CS
CS
XTI
AINR
(Page 31)
LINE AMP
IC103
MUTING
Q200 – 203
MUTING
CONTROL SWITCH
Q702
BUFFER
IC241
SIRCS
BUFFER
Q800
BUFFER
Q870, 871
BUFFER
Q802
REMOTE CONTROL
RECEIVER
IC761
OSC
RV760
REC LEVEL
A
B
A
B
J100
RV790
PHONE
LEVEL
R-CH
R-CH
R-CH
D704
D703
–1
–2
LINE
(ANALOG)
IN
LINE
(ANALOG)
OUT
J790
PHONES
L
R
L
R
DALATCH
ADLATCH
DA
P4
P2
P1
COM24
COM23
DVOL1
DVOL0
MUTE
DARST
CP
CS
+5V
REGULATOR
IC205
+7V
REGULATOR
IC703
–7V
REGULATOR
IC702
–32V
REGULATOR
IC701
POWER ON/OFF
RELAY DRIVE
Q701
+5V
REGULATOR
IC705
+3.3V
REGULATOR
IC192
+5V
REGULATOR
IC102
–32V
(FL DRIVER (IC771) B–)
AC IN
AC
(TO FL781)
RY700
RY701
T701
POWER
TRANSFORMER
UNREG +12V
LOADING MOTOR DRIVER (IC400) B+
+3.3V
MD MECHANISM DECK SECTION,
DIGITAL IN/OUT CIRCUIT B+
+5V
MD MECHANISM DECK SECTION B+
BACK UP +3.3V
BT701
LITHIUM
BATTERY
RECT
D706
D706
RECT
D720, 721
D701
D719
D800
D710
D709
D700
+7V
VCC
AUDIO
CIRCUIT
–7V
RECT
D722, 723
RECT
D711, 712
RELAY B+
RECT
D715 – 718
POWER DOWN
DETECT
IC704
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
AUDIO
INTERFACE
CONTROLLER
HIGH-PASS
FILTER, DIGITAL
ATTENUATOR
CLOCK GENERATOR,
CLOCK DIVIDER
CONTROL
REGISTER
INTERFACE
PLM & BUFFER
A/D CONVERTER
BLOCK
SUB-
TRACKTION
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)
SYS +3.3V
+5V
D/A CONVERTER (IC200) B+
(FOR ANALOG SECTION)
A1OUT
A1IN
D/A CONVERTER
IC200
CURRENT PULSE
IC204
DATA
IN1+
IN1–
IN2+
IN2–
I01+
I02–
I02+
I01–
DADT
BCK
LRCK
LRCK
BCK
LRCK
SWDT
SCLK
L1+
R-CH
BCK
ATT
XIN
64FSI
XOUT
64FSO
FLDATA
FLCLK
FLCS
JOG0
GND
SW
JOG1
MONO/ST
SOURCE
TIMER
KBDTIN
KBCLKIN
KBCLKOUT
P.DOWN
STB
≠ AMS ±
PUSH ENTER
S713
S701 – 706, 711, 712,
S714, 716, 721 – 724,
S714, 716, 721 – 724,
S732, 733, 731
A
B
SHIFT
SWDT
SCLK
LATCH
LRCK
RMC
OSCI
C772, R772
OSCO
256FSO
128FSO
MCLKI
LVCKO
OVFLAG
PD
MIX AMP
IC243 (1/2)
LOW-PASS
FILTER
IC243 (2/2)
ROTARY
ENCODER
RV760
HEADPHONE
AMP
IC790
L1–
L2+
L2+
L2–
R1+
R1–
R2+
R2+
R2–
INIT
(Page 31)
SWDT, SCLK
(Page 31)
512FS
(Page 31)
S/P
ATT & IIR
FIR
OVERFLOW
DETECTOR
ATT & L.I.P.
NOISE
SHAPER &
REGISTER
SWITCHING
CIRCUIT
CONTROL
CIRCUIT
3
ANA5
4
SYS3.3
5
KEY+5V
PH5
1
BACK
6
STBY
2
S.RESET
12
J800
CONTROL
A1 II
SYS +3.3V
S746
REC MODE
S741
INPUT
S751
TIMER
J701
KEY BOARD
•
SIGNAL PATH
: PLAY (ANALOG OUT)
: REC (ANALOG IN)
: REC (ANALOG IN)
RESET
SDA
SCL
EEPROM
IC171
XIN
SDA
SCL
XOUT
X800
10MHz
XT-IN
XT-OUT
X801
32.768kHz
STEREO
MONO
REC
OFF
PLAY
ANALOG
COAX DIGITAL
OPT2 DIGITAL
OPT1 DIGITAL
SYSTEM CONTROLLER
IC800 (2/2)
REGULATOR
IC700
S.RST
3
2
4
47
54
43
41
6
7 8
48
40
28
29
5
32
33
37
36
25
24
20
21
28
27
24
25
4
5
2
1
52
19
13
12
11
15
16
17
9
2
3
87
40
6
35 37 34
70 69 68
65
66
2
1
3
1
88
82
7
61
5
6
66
42 43
100 92 91
19 12 84
83
13
15
11
10
4
67
5
62
61
75
D759
PITCH CONTROL
LED DRIVE
Q759
73
72
D
C
B
A
POWER ON/OFF
RELAY DRIVE
Q700
BUFFER
Q872, 873
KEY+5V
1
5
4
D
ATA
CLK
VCC
21
20
27
MDS-JB930
6-2.
BLOCK DIAGRAM – MAIN Section –
Click on the first or last page to see other MDS-JB930 service manuals if exist.