Sony MDS-S38 / MDS-S39 / MDS-S707 Service Manual ▷ View online
— 33 —
5-7. TRAVERSE ADJUSTMENT
Connection :
Oscilloscope
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
H : 10 ms/div
Input : DC mode
BD board
CN110 pin
3
(TEO)
CN110 pin
2
(VC)
Adjusting method :
1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110
1. Connect an oscilloscope to CN110 pin 3 (TEO) and CN110
pin 2 (VC) of the BD board.
2. Load a disc (any available on the market). (Refer to Note 1.)
3. Press the
3. Press the
0 button or ) button and move the optical pick-
up outside the pit.
4. Rotate the AMS knob and display “EFBAL ADJUST”.
5. Press the YES button and display “EFB =
5. Press the YES button and display “EFB =
MO-R”.
(Laser power READ power/Focus servo ON/tracking servo OFF/
spindle (S) servo ON)
spindle (S) servo ON)
6. Rotate the AMS knob so that the waveform of the oscilloscope
becomes the specified value.
(When the AMS knob is rotated, the
(When the AMS knob is rotated, the
of “EFB=
” changes
and the waveform changes.) In this adjustment, waveform var-
ies at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Read power traverse adjustment)
ies at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Read power traverse adjustment)
(Traverse Waveform)
VC
A
B
Specification A = B
7. Press the YES button 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).
8. Rotate the AMS knob so that the waveform of the oscilloscope
becomes the specified value.
(When the AMS knob is rotated, the
(When the AMS knob is rotated, the
of “EFB-
” changes
and the waveform changes.) In this adjustment, waveform var-
ies at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Write power traverse adjustment)
ies at intervals of approx. 2%. Adjust the waveform so that the
specified value is satisfied as much as possible.
(Write power traverse adjustment)
(Traverse Waveform)
VC
A
Specification A = B
B
9. Press the YES button, 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.
is imposed.
11. Rotate the AMS knob 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)
VC
A
B
Specification A = B
12. Press the YES button, and save the adjustment results in the
non-volatile memory. (“EFB =
SAVE” will be displayed for
a moment.)
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.
13. Press the
§ button and remove the disc.
14. Load the check disc (MD) TDYS-1.
15. Press the YES button and display “EFB =
15. Press the YES button and display “EFB =
CD”. Servo is
imposed automatically.
16. Rotate the AMS knob 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)
VC
A
B
Specification A = B
17. Press the YES button, display “EFB =
SAVE” for a moment
and save the adjustment results in the non-volatile memory.
Next “EFBAL ADJUST” will be displayed.
Next “EFBAL ADJUST” will be displayed.
18. Press the
§ button and remove the check disc (MD) TDYS-1.
Note 1 : MO reading data will be erased during if a recorded disc is
used in this adjustment.
Note 2 : If the traverse waveform is not clear, connect the oscillo-
scope as shown in the following figure so that it can be
seen more clearly.
seen more clearly.
Oscilloscope
330 k
Ω
10pF
BD board
CN110 pin
3
(TEO)
CN110 pin
2
(VC)
— 34 —
5-8. FOCUS BIAS ADJUSTMENT
Adjusting Method :
1. Load a continuously recorded disc (Refer to “5-4. Creating Con-
1. Load a continuously recorded disc (Refer to “5-4. Creating Con-
tinuously Recorded Disc”.).
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press the YES button and display “CPLAY MID”.
4. Press the NO button when “C1 =
3. Press the YES button and display “CPLAY MID”.
4. Press the NO button when “C1 =
AD =
” is displayed.
5. Rotate the AMS knob and display “FBIAS ADJUST”.
6. Press the YES button and display “
6. Press the YES button and 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. Rotate the AMS knob in the clockwise direction and find the
focus bias value at which the C1 error rate becomes 220 (Refer
to Note 2).
to Note 2).
8. Press the YES button and display “
/
b =
”.
9. Rotate the AMS knob in the counterclockwise direction and find
the focus bias value at which the C1 error rate becomes 220.
10. Press the YES button and display “
/
c =
”.
11. Check that the C1 error rate is below 50 and ADER is 00. Then
press the YES button.
12. If the “(
)” in “
-
-
(
)” is above 20, press the YES
button.
If below 20, press the NO button and repeat the adjustment from
step 2.
If below 20, press the NO button and repeat the adjustment from
step 2.
13. Press the
§ button to remove the continuously recorded 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 automatically calculated from points a
and b.
following figure using the above adjustment. The focal
point position C is automatically calculated from points a
and b.
Note 2 : As the C1 error rate changes, perform the adjustment us-
ing the average vale.
5-9. ERROR RATE CHECK
5-9-1. CD Error Rate Check
Checking Method :
1. Load a check disc (MD) TDYS-1.
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press the YES button twice and display “CPLAY MID”.
4. The display changes to “C1 =
1. Load a check disc (MD) TDYS-1.
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press the YES button twice and display “CPLAY MID”.
4. The display changes to “C1 =
AD =
”.
5. Check that the C1 error rate is below 20.
6. Press the NO button, stop playback, press the
6. Press the NO button, stop playback, press the
§ button, and
remove the test disc.
5-9-2. MO Error Rate Check
Checking Method :
1. Load a continuously recorded disc (Refer to “5-4. Creating Con-
1. Load a continuously recorded disc (Refer to “5-4. Creating Con-
tinuously Recorded Disc”.).
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press the YES button and display “CPLAY MID”.
4. The display changes to “C1 =
3. Press the YES button and 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 NO button, stop playback, press the
6. Press the NO button, stop playback, press the
§ button, and
remove the continuously recorded disc.
5-10. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Method :
1. Load a continuously recorded disc (Refer to “5-4. Creating Con-
Checking Method :
1. Load a continuously recorded disc (Refer to “5-4. Creating Con-
tinuously Recorded Disc”.).
2. Rotate the AMS knob and display “CPLAY MODE”.
3. Press the YES button twice and display “CPLAY MID”.
4. Press the NO button when “C1 =
3. Press the YES button twice and display “CPLAY MID”.
4. Press the NO button when “C1 =
AD =
” is displayed.
5. Rotate the AMS knob and display “FBIAS CHECK”.
6. Press the YES button and display “
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 00.
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 00.
7. Press the YES button and display “
/
b =
”.
Check that the C1 error is not below 220 and ADER is not
above 00 every time.
above 00 every time.
8. Press the YES button and display “
/
a =
”.
Check that the C1 error is not below 220 and ADER is not above
00 every time.
00 every time.
9. Press the NO button, next press the
§ button, and remove the
continuously recorded disc.
Note 1 : If the C1 error and ADER are above 00 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 properly. Ad-
just perform the beginning again.
adjustment may not have been carried out properly. Ad-
just perform the beginning again.
220
C1 error
b
c
a
Focus bias value
(F. BIAS)
(F. BIAS)
— 35 —
— 36 —
5-11. ADJUSTING POINTS AND CONNETING POINTS
[BD BOARD] (SIDE A)
IC192
NOTE : It is useful to use the jig. for checking the waveform.
(Refer to Servicing Note on page 5.)
[BD BOARD] (SIDE B)
1
5 CN110
RF
VC
TEO
IOP
I + 3V
NOTE
CN101
D101
IC171
IC101
IC121
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
TRANSFORMER board
MAIN board
SW board
PANEL board
BD board
— 37 —
— 38 —
6-2. BLOCK DIAGRAMS
— BD SECTION —
— BD SECTION —
MDS-S38
HR901
OVER WRITE
HEAD
HEAD
DRIVE
Q181,182
11
14
15
17
3
9
18
2
1
18
Q180
FILTER
PCO
FILI
FILO
CLTV
PLL
EFM,
ACIRC,
ENCODER/
DECODER
RF AGC & EQ
AGCI
RFO
MORFI
MORFO
RF AMP
1
2
BPF
P-P
AT
AMP
BPF
VC
VC
ANALOG
MUX
27
16
17
18
SERIAL
PARALLEL
DECODER
VICONV
20
25
22 23
4
5
6
7
8
9
IV AMP
IV AMP
E-F
BALANCE
14
15
3
VCC
VC
D101
12
11
10
LASER ON
SW
Q101
PD
APC
Q162,163
HF
MODULE
HF MODULE
SW
IC103,Q102-104
TRAKING
COIL
FOCUS
COIL
10
12
DRIVER
21
DRIVER
23
27
DRIVER
25
6
8
DRIVER
16
TFDR
PSB
XRST
SLED/SPINDLE MOTOR DRIVE
FOCUS/TRACKING COIL DRIVE
FOCUS/TRACKING COIL DRIVE
IC152
09
M
M
M902
SLED MOTOR
M901
SPINDLE MOTOR
DETECTOR
F
I
J
C
D
D
B
A
E
VC
LD
PD
ILCC
15
14
ATRAC
ENCODER/
DECODER
SAMPLING
RATE
CONVERTER
DTRF
CKRF
XLRF
FOCNT
79
82
81
80
93
94
95
10
SPRD
SPFD
FG IN
XRST
SPINDLE
SERVO
ADIP
DEMODULATOR/
DECODER
78
ADFG
A/D
CONVERTER
APC
SERVO
DSP
PWM
GENERATOR
DIGITAL
AUDIO
I/F
22
24
23
21
SUBCODE
PROCESSOR
11
12
MONITOR
CONTROL
4
3
2
1
3
CPU
I/F
AUTO
SEQUENCER
16
25
26
7
5
6
8
9
1
5
512FS
M
M903
LOADING MOTOR
BCK
LRCK
BUFFER
IC123
DRAM
IC124
SQSY
DQSY
MNT3
MNT2
MNT1
MNT1
MNT0
SENS
SRDT
SCLK
SWDT
XLAT
DIN
ADDT
DADT
DOUT
91
92
85
86
89
88
83
13
RECP
APCREF
FFDR
FRDR
TFDR
TRDR
SFDR
SRDR
FOCNT
XLAT
SCLK
SWDT
CSLED
SE
TE
26
28
32
30
ADFG
ADIN
ADFM
29
31
34
65
67
74
73
EE
VC
TE
SE
33
66
36
37
35
63
62
64
AUX
BOTM
PEAK
ABCD
FE
AUX1
BOTM
PEAK
ABCD
38
RF
55
RFI
58
59
60
60
61
ABCD
AMP
FOCUS
ERROR
AMP
I
J
A
B
C
D
D
E
F
F
VC
CVB
TEMP
AMP
TEMPR
TEMPI
APC
APCREF
EQADJ
3TADJ
WBLADJ
TRACKING
ERROR
AMP
OPTICAL PICK-UP BLOCK
(KMS-260A/J1N)
48 47 46 40
RF AMP
IC101
EFMO
TX
XINIT
CLOCK
GENERATOR
85
86
89
88
92
91
94
93
SPFD
SPRD
SPRD
SFDR
SRDR
TRDR
FRDR
FFDR
OVER WRITE HEAD DRIVE
IC181
OSCI
XBCK
LRCK
VC
VC
PEAK
&
BOTTOM
TRK–
TRK+
FSC+
FSC–
SLED+
SLED–
SPDL+
SPDL–
DIGITAL SERVO SIGNAL PROCESSOR, DIGITAL SIGNAL PROCESSOR
EFM/ACIRC ENCODER/DECODER, SHOCK-PROOF MEMORY CONTROLLER,
ATRAC ENCODER/DECODER, 2M-BIT DRAM
IC121
IC122
4
2
1
SCTX
XINT
XINT
DIN
ADDT
DADT
DOUT
SQSY
DQSY
MNT3
MNT2
MNT1
MNT0
MNT1
MNT0
SENS
SRDT
SRDT
SCLK
SWDT
XLAT
SWDT
XLAT
LDON
WRPWR
MOD
6
5
SDA
SDA
SCL
SCL
LIMIT
REFLECT
REFLECT
PROTECT
CHUCK IN
PACK OUT
CHUCK IN
PACK OUT
PB P
REC P
EEP ROM
IC171
LOAD-IN
LOAD-OUT
LOAD-OUT
XRST
MAIN
SECTION
DETECT SW
S681 - 683,
S685 - 688
100
• Signal path
: PB
: REC
: PB (Digital out)
: REC (Digital in)
: PB
: REC
: PB (Digital out)
: REC (Digital in)
47 • 46 • 48 • 49
32 29 • 34 38 • 43
D0
D3
A0
A9
45
44
3
4
17
16
1
2
18
19
6
9
11
15
5
XWE
XRAS
XCAS
XCAS
XOE
DQ1
DQ4
•
•
•
•
A0
A9
42
41
20
XWE
XRAS
XCAS
XOE
•
SHOCK
RESISTANT
MEMORY
CONTROLLER
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