Sony MDS-NT1 Service Manual ▷ View online
33
MDS-NT1
8. Click the
[JOG UP]
or
[JOG DOWN]
so that the waveform
of the oscilloscope becomes the specified value.
(When the
(When the
[JOG UP]
or
[JOG DOWN]
is clicked, the
of
“EFB=
” changes and the waveform changes.) In this ad-
justment, waveform varies at intervals of approx. 2%. Adjust
the waveform so that the specified value is satisfied as much
as possible.
(Write power traverse adjustment)
the waveform so that the specified value is satisfied as much
as possible.
(Write power traverse adjustment)
Traverse Waveform
9. Click the
[ENTER/YES]
, and save the adjustment results in
the non-volatile memory. (“EFB =
SAVE” will be displayed
for a moment)
10. “EFB =
MO-P” will be displayed.
The optical pick-up moves to the pit area automatically and
servo is imposed.
servo is imposed.
11. Click the
[JOG UP]
or
[JOG DOWN]
until the waveform of
the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
12. Click the
[ENTER/YES]
, and save the adjustment results in
the non-volatile memory. (“EFB =
SAVE” will be displayed
for a moment.)
Next “EF MO ADJUST” (C07) is displayed. The disc stops
rotating automatically.
Next “EF MO ADJUST” (C07) is displayed. The disc stops
rotating automatically.
13. Click the
[EJECT]
and take out the disc.
14. Load the check disc (MD) TDYS-1.
15. Click the
15. Click the
[JOG UP]
or
[JOG DOWN]
to display “EF CD
ADJUST” (C08).
16. Click the
[ENTER/YES]
to display “EFB =
CD”. Servo is
imposed automatically.
17. Click the
[JOG UP]
or
[JOG DOWN]
so that the waveform
of the oscilloscope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 2%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
Traverse Waveform
18. Click the
[ENTER/YES]
, display “EFB =
SAVE” for a mo-
ment and save the adjustment results in the non-volatile
memory.
Next “EF CD ADJUST” (C08) will be displayed.
memory.
Next “EF CD ADJUST” (C08) will be displayed.
19. Click the
[EJECT]
button and take out the disc (MD) TDYS-
1.
Adjustment Location: BD board (see page 35)
5-14. FOCUS BIAS ADJUSTMENT
Adjusting Procedure:
1. Load the continuously-recorded disc. (Refer to “5. USING
1. Load the continuously-recorded disc. (Refer to “5. USING
THE CONTINUOUSLY RECORDED DISC”)
2. Click the
[JOG UP]
or
[JOG DOWN]
to display “CPLAY2
MODE” (C36).
3. Click the
[ENTER/YES]
to display “CPLAY2MID”.
4. Click the
[MENU/NO]
when “C =
AD =
” is displayed.
5. Click the
[JOG UP]
or
[JOG DOWN]
to display “FBIAS
ADJUST” (C09).
6. Click the
[ENTER/YES]
to display “
/
a =
”.
The first four digits indicate the C1 error rate, the two digits
after “/ ” indicate ADER, and the 2 digits after “a =” indicate
the focus bias value.
after “/ ” indicate ADER, and the 2 digits after “a =” indicate
the focus bias value.
7. Click the
[JOG UP]
and find the focus bias value at which the
C1 error rate becomes about 200 (refer to Note 2).
8. Click the
[ENTER/YES]
to display “
/
b =
”.
9. Click the
[JOG DOWN]
and find the focus bias value at which
the C1 error rate becomes about 200.
10. Click the
[ENTER/YES]
to display “
/
c =
”.
11. Check that the C1 error rate is below 20 and ADER is 00.
Then click the
[ENTER/YES]
.
12. If the “(
)” in “
-
-
(
)” is above 20, click the
[ENTER/YES]
button.
If below 20, click the
[MENU/NO]
and repeat the adjustment
from step 2.
13. Click the
[EJECT]
button and take out the disc.
Note 1:
The relation between the C1 error and focus bias is as shown in
the following figure. Find points A and B in the following figure
using the above adjustment. The focal point position C is auto-
matically calculated from points A and B.
the following figure. Find points A and B in the following figure
using the above adjustment. The focal point position C is auto-
matically calculated from points A and B.
Note 2:
As the C1 error rate changes, perform the adjustment using the
average vale.
average vale.
A
B
VC
Specification A = B
A
B
VC
Specification A = B
A
B
VC
Specification A = B
C1 error
about
200
200
B
C
A
Focus bias value
7. Click the
[ENTER/YES]
and save the result of adjustment to
the non-volatile memory (“EFB =
SAVE” will be displayed
for a moment. Then “EFB =
MO-W” will be displayed).
34
MDS-NT1
5-15. ERROR RATE CHECK
5-15-1. CD Error Rate Check
Checking Procedure:
1. Load the check disc (MD) TDYS-1.
2. Click the
1. Load the check disc (MD) TDYS-1.
2. Click the
[JOG UP]
or
[JOG DOWN]
to display “CPLAY2
MODE” (C36).
3. Click the
[ENTER/YES]
twice and display “CPLAY2MID”.
4. The display changes to “C =
AD =
”.
5. Check that the C1 error rate is below 20.
6. Click the
6. Click the
[MENU/NO]
to stop playback, then click the
[EJECT]
and take out the check disc.
5-15-2. MO Error Rate Check
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5-6. USING
1. Load the continuously-recorded disc. (Refer to “5-6. USING
THE CONTINUOUSLY RECORDED DISC”)
2. Click the
[JOG UP]
or
[JOG DOWN]
to display “CPLAY2
MODE” (C36).
3. Click the
[ENTER/YES]
to display “CPLAY2MID”.
4. The display changes to “C =
AD =
”.
5. If the C1 error rate is below 20, check that ADER is 00.
6. Click the
6. Click the
[MENU/NO]
to stop playback, then click the
[EJECT]
and take out the test disc.
5-16. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure:
1. Load the continuously-recorded disc. (Refer to “5-6. USING
1. Load the continuously-recorded disc. (Refer to “5-6. USING
THE CONTINUOUSLY RECORDED DISC”)
2. Click the
[JOG UP]
or
[JOG DOWN]
to display “CPLAY2
MODE” (C36).
3. Click the
[ENTER/YES]
twice to display “CPLAY2MID”.
4. Click the
[MENU/NO]
when “C =
AD =
” is displayed.
5. Click the
[JOG UP]
or
[JOG DOWN]
to display “FBIAS
CHECK” (C16).
6. Click the
[ENTER/YES]
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 20 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 20 and ADER is below 2.
7. Click the
[ENTER/YES]
and display “
/
b =
”.
Check that the C1 error is about 100 and ADER is below 2.
8. Click the
[ENTER/YES]
and display “
/
a =
”.
Check that the C1 error is about 100 and ADER is below 2
9. Click the
[MENU/NO]
, then click the
[EJECT]
and take out
the disc.
Note:
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.
5-17. 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.
5-17-1. CD Auto Gain Control Output Level Adjustment
Adjusting Procedure:
1. Load the check disc (MD) TDYS-1.
2. Click the
1. Load the check disc (MD) TDYS-1.
2. Click the
[JOG UP]
or
[JOG DOWN]
to display “AG Set (CD)”
(C11).
3. When the
[ENTER/YES]
is clicked, the adjustment will be
performed 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)” (C11).
“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)” (C11).
4. Click the
[EJECT]
and take out the check disc.
5-17-2. MO Auto Gain Control Output Level Adjustment
Adjusting Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Click the
1. Load the test disc (MDW-74/GA-1).
2. Click the
[JOG UP]
or
[JOG DOWN]
to display “AG Set
(MO)” (C10).
3. When the
[ENTER/YES]
is clicked, the adjustment will be
performed 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)” (C10).
“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)” (C10).
4. Click the
[EJECT]
and take out the test disc.
35
35
MDS-NT1
Adjustment and Checking Loacation:
– BD BOARD (Component Side) –
– BD BOARD (Conductor Side) –
D101
CN101
IC101
IC201
IC933
CN105
1
1. I+3V
2. Iop
3. GND
4. TE
5. FE
6. VC
7. RF
2. Iop
3. GND
4. TE
5. FE
6. VC
7. RF
7
Note:
It is useful to use the jig for checking the waveform. (Refer to Ser-
vicing Notes on page 8)
vicing Notes on page 8)
36
36
MDS-NT1
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – SERVO Section –
F
C
B
D
A
E
I
J
J
I
B
A
C
D
E
F
DETECTOR
J
I
A
B
C
D
B
C
D
E
F
LD
PD
LASER DIODE
ILCC
PD
OPTICAL PICK-UP BLOCK
(KMS-262E)
AUTOMATIC
POWER CONTROL
Q202, 203
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
IC401
OUT4F
OUT4R
M101
(SPINDLE)
OUT2F
OUT2R
M102
(SLED)
OUT3F
OUT3R
OUT3R
OUT1F
OUT1R
OUT1R
FCS+
FCS–
TRK+
TRK–
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
IN4R
IN4F
IN2F
IN2R
IN3F
IN3R
IN1F
IN1R
MOD
SPFD
SPRD
APCR
SFDR
SRDR
FFDR
FRDR
FRDR
TFDR
TRDR
TRDR
PSB
PWM GENERATOR
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC201 (2/2)
RPWR
AUX1
ABCD
FE
TE
SE
PEAK
BOTM
XLRF
CLRF
CLRF
DTRF
XLAT
SCLK
SWDT
FILI
PCO
CLTV
FILO
EFMO
ADDT
DATAI
IC201 (1/2)
TX
ASYO
ASYI
RFI
SCTX
HR901
OVER WRITE HEAD
ADFG
F0CN
SPFD
SPRD
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE
DIN0
DOUT
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
SHOCK PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER
IC201 (1/2)
INTERNAL BUS
DADT
XBCK
LRCK
LRCK
FS256
DADT
BCK
LRCK
FS256
OSCI
OSCO
DQSY
SQSY
XINT
SENS
SRDT
SWDT
SCLK
XLAT
MNT0 (FOK)
MNT1 (SHCK)
MNT2 (XBUSY)
MNT3 (SLOC)
SHOCK
XBUSY
SWDT
SCLK
SWDT
SCLK
XLATCH
SHOCK
XBUSY
D. RESET
SQSY
DQSY
LDON
WRPWR
MOD
XINT
SENSE
SRDT
LOAD-IN
LOAD-OUT
IN1
IN2
VZ
LOADING
MOTOR DRIVE
IC440
M103
(LOADING)
DQ1 – DQ4
A0 – A10
D0 – D3
A00 – A10
XOE
XWE
XRAS
XCAS
OE
WE
RAS
CAS
WE
RAS
CAS
D-RAM
IC152
DIN1
SYSTEM CONTROLLER
IC301 (1/2)
HF MODULE
DADTI, XBCKI,
LRCKI, DIN1
DADT, BCK,
LRCK, FS256
SWDT, SCLK
REFLECT
PROTECT
LOAD-LO
+5V
63
LIMIT-IN
REC-SW
S101
(LIMIT IN)
OUT-SW
•
SIGNAL PATH
: PLAY
: REC
: REC
S105
(REC)
S103
(OUT)
PLAY-SW
S104
(PLAY)
S102-1
(REFELECT RATE DETECT)
S102-2
(PROTECT DETECT)
–1
S102
–2
XBCKI
LRCKI
DADTI
XBCKI
LRCKI
DIN1
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
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
6
7
10
LASER ON
SWITCH
Q201
LD/PD
AMP
I-V
AMP
I-V
AMP
FOCUS
ERROR AMP
TRACKING
ERROR AMP
RF AMP
B.P.F.
PEAK &
BOTTOM
6
8
98
97
15
80 78 79 86 85 76 77
99
27
25
12
10
10
21
23
23
19
18
18
14
15
15
29
30
3
4
16
M
M
M
DIGITAL SERVO
SIGNAL
PROCESS
ANALOG MUX
A/D CONVERTER
SERIAL/PARALLEL
CONVERTER,
DECODER
AUTO
SEQUENCER
V-I
CONVERTER
HF MODULE
SWITCH
Q701 – 704
115
73
72
75
74
67
68
70
91
94
14 13
16
11 10 6 7 8
1 2 3 4
38
37
37
19
36
34
35
33
26
25
24
28
29
27
32
20
47
46
46
22
4
5
5
23
17
ADIP
DEMODULATOR/
DECODER
SPINDLE
SERVO
COMPA-
RATOR
PLL
FILTER
SUBCODE
PROCESSOR
EFM/ACIRC
ENCODER/DECODER
SHOCK PROOF
MEMORY CONTROLLER
ATRAC/ATRACK3
ENCODER/DECODER
CPU
INTERFACE
MONITOR
CONTROL
CONTROL
16
43
48
46
46
42
18
23
49
XRST
12
30
31 51
55 54
29
CLOCK
GENERATOR
42 – 45
2, 3, 24, 25
48 – 56, 59, 60
8 – 12, 15 – 19, 21
C
B
A
65 64
3
6
5
7
2
45
47
53
50
58
56
52
57
59
M
REFERENCE
VOLTAGE SWITCH
Q401, 440
IOP
87
COMPARATOR
IC701
X801
90.3168MHz
OUT1
OUT2
7
6
5
WP
SCL
SDA
EEP-WP
SCL
SDA
EEPROM
IC195
108
100
107
104
105
105
103
102
102
109
110
(Page 37)
(Page 37)
(Page 37)
Click on the first or last page to see other MDS-NT1 service manuals if exist.