Sony MDS-DRE1 Service Manual ▷ View online
– 17 –
Traverse Adjustment
Connection:
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. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
12. Press the
[ENTER/YES]
button, display “EFB = $ SAV” for
a moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.
memory.
Next “EFBAL CD” is displayed. The disc stops rotating auto-
matically.
13. Press the
[ EJECT]
button and remove the MO disc.
14. Load the check disc (MD) TDYS-1.
15. Press the
15. Press the
[ENTER/YES]
button and display “EFB = $ CD”.
Servo is imposed automatically.
16. Rotate the
[AMS]
knob so that the waveform of the oscillo-
scope moves closer to the specified value.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
In this adjustment, waveform varies at intervals of approx. 3%.
Adjust the waveform so that the specified value is satisfied as
much as possible.
(Traverse Waveform)
17. Press the
[ENTER/YES]
button, display “EFB = $ SAV” for
a moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL ADJUS” is displayed.
memory.
Next “EFBAL ADJUS” is displayed.
18. Press the
[ EJECT]
button and remove the test disc TDYS-1.
Note 1:
Data will be erased during MO reading if a recorded disc is used
in this adjustment.
in this adjustment.
Note 2:
If the traverse waveform is not clear, connect the oscilloscope as
shown in the following figure so that it can be seen more clearly.
shown in the following figure so that it can be seen more clearly.
Adjusting method:
1. Connect an oscilloscope to TP75 (TEO) and TP31 (VC) of the
1. Connect an oscilloscope to TP75 (TEO) and TP31 (VC) of the
BD board.
2. Load a MO disc (any available on the market). (Refer to Note
1)
3. Press the
[ ]
button or
[ ]
button and move the optical
pick-up outside the pit.
4. Rotate the
[AMS]
knob and display “EFBAL ADJUS”.
5. Press the
[ENTER/YES]
button and display “EFBAL MO-W”.
(Laser power WRITE power/Focus servo ON/tracking servo
OFF/spindle (S) servo ON)
OFF/spindle (S) servo ON)
6. Adjust RV101 of the BD board so that the waveform of the
oscilloscope becomes the specified value.
(MO groove write power traverse adjustment)
(MO groove write power traverse adjustment)
(Traverse Waveform)
7. Press the
[ENTER/YES]
button and display “EFB = $ MO-
R”.
(Laser power: MO reading)
(Laser power: MO reading)
8. Rotate the
[AMS]
knob so that the waveform of the oscillo-
scope becomes the specified value.
(When 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. 3%. Adjust the waveform so that
the specified value is satisfied as much as possible.
(MO groove read power traverse adjustment)
ies at intervals of approx. 3%. Adjust the waveform so that
the specified value is satisfied as much as possible.
(MO groove read power traverse adjustment)
(Traverse Waveform)
9. Press the
[ENTER/YES]
button, display “EFB = $ SAV” for
a moment and save the adjustment results in the non-volatile
memory.
Next “EFBAL MO-P” is displayed.
memory.
Next “EFBAL MO-P” is displayed.
10. Press the
[ENTER/YES]
button and display “EFB = $ MO-
P”.
The optical pick-up moves to the pit area automatically and
servo is imposed.
The optical pick-up moves to the pit area automatically and
servo is imposed.
Oscilloscope
BD board
TP75 (TEO)
TP31 (VC)
VC
A
B
Specification A = B
VC
A
B
Specification A = B
VC
A
B
Specification A = B
VC
A
B
Specification A = B
0
)
§
§
Oscilloscope
330 k
Ω
10 pF
BD board
TP75 (TEO)
TP31 (VC)
– 18 –
Focus Bias Adjustment
Adjusting Method:
1. Load a continuously recorded disc (Refer to “Page 15 Creat-
1. Load a continuously recorded disc (Refer to “Page 15 Creat-
ing Continuously Recorded Disc”).
2. Rotate the
[AMS]
knob and display “CPLAY MODE”.
3. Press the
[ENTER/YES]
button twice and display “CPLAY
MID”.
4. Press the
[EDIT/NO]
button when “C1 =
AD =
” is
displayed.
5. Rotate the
[AMS]
knob and display “FBIAS ADJUS”.
6. Press the
[ENTER/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 about 200
(Refer to Note 2) .
(Refer to Note 2) .
8. Press the
[ENTER/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
about 200.
The C1 error rate at this time should be almost same as the
value set in step 7.
about 200.
The C1 error rate at this time should be almost same as the
value set in step 7.
10. Press the
[ENTER/YES]
button and display “
/
c =
”.
11. Check that the C1 error rate is below 50 and ADER is 00.
Then press the
[ENTER/YES]
button.
12. If the “(
” in “
-
-
(
” is above 20, press the
[ENTER/YES]
button.
If below 20, press the
[EDIT/NO]
button and repeat the adjust-
ment from step 2 again.
13. Press the
[EDIT/NO]
button and press the
[ EJECT]
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.
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.
Note 2:
As the C1 error rate changes, perform the adjustment using the
average value.
average value.
Error Rate Check
CD Error Rate Check
Checking Method:
1. Load a check disc (MD) TDYS-1.
2. Rotate the
1. Load a check disc (MD) TDYS-1.
2. Rotate the
[AMS]
knob and display “CPLAY MODE”.
3. Press the
[ENTER/YES]
button twice and display “CPLAY
MID”.
4. “C1 =
AD =
” is displayed.
5. Check that the C1 error rate is below 20.
6. Press the
6. Press the
[EDIT/NO]
button, stop playback, press the
[ EJECT]
button, and remove the check disc.
MO Error Rate Check
Checking Method:
1. Load a continuously recorded disc (Refer to “Page 15 Creat-
1. Load a continuously recorded disc (Refer to “Page 15 Creat-
ing Continuously Recorded Disc”).
2. Rotate the
[AMS]
knob and display “CPLAY MODE”.
3. Press the
[ENTER/YES]
button twice and display “CPLAY
MID”.
4. “C1 =
AD =
” is displayed.
5. If the C1 error rate is below 50, check that ADER is 00.
6. Press the
6. Press the
[EDIT/NO]
button, stop playback, press the
[ EJECT]
button, and remove the continuously recorded disc.
Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Method:
1. Load a continuously recorded disc (Refer to “Page 15 Creat-
Checking Method:
1. Load a continuously recorded disc (Refer to “Page 15 Creat-
ing Continuously Recorded Disc”).
2. Rotate the
[AMS]
knob and display “CPLAY MODE”.
3. Press the
[ENTER/YES]
button twice and display “CPLAY
MID”.
4. Press the
[EDIT/NO]
button when “C1 =
AD =
” is
displayed.
5. Rotate the
[AMS]
knob and display “FBIAS CHECK”.
6. Press the
[ENTER/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
[ENTER/YES]
button and display “
/
b =
”.
Check that the C1 error is not below about 200 and ADER is
not above 00 every time.
not above 00 every time.
8. Press the
[ENTER/YES]
button and display “
/
a =
”.
Check that the C1 error is not below about 200 and ADER is
not above 00 every time.
not above 00 every time.
9. Press the
[EDIT/NO]
button, next press the
[ EJECT]
button,
and remove the continuously recorded disc.
Note 1:
If the C1 error and ADER are above 00 at points a or b, the focus
bias adjustment may not have been carried out properly. Adjust
perform the beginning again.
bias adjustment may not have been carried out properly. Adjust
perform the beginning again.
about 200
b
c
a
Focus bias
value
(F. BIAS)
value
(F. BIAS)
C1 error
§
§
§
§
– 19 –
Adjusting Points and Connecting Points
[BD Board] (Side A)
[BD Board] (Side B)
D101
IC191
TP58
(IOP) TP57
(IOP) TP57
(I + 5V)
TP31
(VC)
TP75
(TEO)
RV102
IC171
IC121
IC101
RV101
MDS-DRE1
– 21 –
– 22 –
SECTION 6
DIAGRAMS
6-1.
BLOCK DIAGRAM – SERVO Section –
INTERNAL BUS
FFDR
FRDR
TFDR
TRDR
I
J
F
C
B
D
A
E
I
J
I
J
B
A
C
D
E
F
DETECTOR
A
E
F
F
RV101
RV102
B
C
D
OPTICAL PICK-UP
(KMS-210A/J-N)
LASER DIODE
PD
LD
PD
ILCC
LASER ON
SWITCH
Q101
I-V AMP
IC172
E-F BALANCE
LASER
POWER
OVER WRITE
HEAD DRIVE
IC181, Q181, 182
PD
AAPC
APC
RF
AMP
RF AMP, FOCUS/TRACKING
ERROR AMP
IC101
HR901
OVER WRITE HEAD
MORFO
RFO
RF
AGC & EQ
MORFI
AGCI
RF
AUX
SWITCH
AUX
PEAK &
BOTTOM
PEAK
BOTM
TLB
4
IC102
2
4
IC182
2
I-V
AMP
ADFM
ADIN
ADFG
ABCD
FOCUS
ERROR AMP
ABCD
AMP
FE
TE
SE
TRACKING
ERROR AMP
I-V
AMP
FI
FO
SWDT
SCLK
XLAT
XRST
SERIAL TO PARALLEL
DECODER
FO4
RO4
M102
(SPINDLE)
FO2
RO2
M101
(SLED)
FO3
RO3
FO1
RO1
TRK+
05
TRK–
FCS+
FCS–
WRPWR
MOD
2-AXIS
DEVICE
(FOCUS)
(TRACKING)
RI4
F/R4
SPFD
SPRD
FI2
RI2
FI3
RI3
FI1
RI1
SPINDLE/SLED MOTOR DRIVE,
FOCUS/TRACKING COIL DRIVE
IC151
SFDR
SRDR
PWM GENERATOR
SERVO
SIGNAL PROCESSOR
APCREF
DIGITAL SERVO SIGNAL
PROCESSOR
IC121 (2/2)
APC PWM
GENERATOR
LDDR
APC
COMP./
FILTER
WRPWR
FE
TE
SE
ABCD
PEAK
BOTM
AUX1
AUX2
ANALOG MUX
A/D CONVERTER
OFTRK/
DFCT/FOK/
COUT/SHCK/
FS256
PROCESSOR
OFTRK
DFCT
FOK
COUT
SHCK
FS256
SERVO
AUTO
SEQUENCER
SENS
CONTROL
HF
MODULE
HF MODULE SWITCH
Q164
SENS
FILTER
FILTER
34MHz
PLL
CLTV
EFMO
FILI
FILO
PCO
EFM
MODULATOR
REGISTER
REGISTER
SUBCODE
P TO W
PROCESSOR
SUBCODE Q
READER/
GENERATOR
COMPARATOR
RFI
EFM
DEMODULATOR
PEAK
DETECT
EFM
DIGITAL
PLL
ASYI
ASYO
XPLCK
GTOP
EFM-SYNC
DETECTOR/
PROTECTOR
WFCK
GFS
TIMING GENERATOR
DIGITAL
CLV
PROCESSOR
ADIP
DEMODU-
LATOR
ADIP
DECODER
FMCK
ADFG
ADSY
ATER
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER
IC121 (1/2)
SPRD
SPFD
DIGITAL
AUDIO
IN/OUT
DIN PLL
(22MHz)
AUDIO
DATA
CONTROL
SQSY
DQSY
ECC
ENCODER/
DECODER
TIMING
GENERATOR
CLOCK
GENERATOR
DIN
DOUT
DIFI
DIFO
DICV
DIPD
DODT
DIDT
DTI
DTO
C2PO
LRCK
BCK
MCLK
XBCK
WDCK
RFCK
FS4
XTAI
XTAO
CPU INTERFACE
SWDT
SCLK
XLAT
SRDT
REC
REC/PB
SCL
SDA
SCL
SDA
B.P.F.
AT
AMP
32K
RAM
2
30
37
35
26
29
31
33
27
3
47
48
46
44
41
58
30
31
33
32
36
37
39
39
40
8 9 10 11
16 24
65
75
74
6
5
SQSY
5
WPOWER
71
68 69 70 76 66
LD-ON
FG
FOK
SHOCK
SENSE
MOD
79
35
34
29
52
49
51
53
27
28
21
20
60
62
45
61
63
56
55
41
44
42
43
22
82
23 13
93 94
14 15
34
39
38
45
43
6
7
8
9
10
14
11
67
6
76
77
66
64 65 68 78
98
3
2
99
4
1
12
84
92
91
17
18
33
19
20
22
24
86
85
87
89
31
32
6
5
CLK
18
19
20
17
4
5
AUTOMATIC
POWER CONTROL
Q162, 163
4
2
IC122
Q151
SPINDLE
MOTOR DRIVE
15
13
SLED
MOTOR DRIVE
29
26
TRACKING
COIL DRIVE
8
11
FOCUS
COIL DRIVE
M
M
OE
A
(Page 23)
SCTX
C
(Page 23)
DATA
D
(Page 23)
BCK, LRCK, C2PO
E
(Page 24)
512FS
•
SIGNAL PATH
: PLAY
: REC
XRST
B
(Page 23)
DODT
F
(Page 23)
SWDT, SCLK, XLAT, SRDT
H
(Page 23)
SCL
G
(Page 24)
XRST
M
9
10
4
2
MOTOR
DRIVE
LOADING MOTOR DRIVE
IC901
EEPROM
IC171
SYSTEM CONTROLLER
IC101 (1/4)
OUT1
OUT2
IN1
IN2
M191
(LOADING)
REFLECT
OUT SW
PROTECT
57
S102
(REFLECT/PROTECT DETECT)
S102
80
58
LIMIT-IN
PLAY SW
S101
(LIMIT)
59
REC SW
S191
(PLAY POSITION)
S191
S193
(REC POSITION)
S193
S192
(PACK OUT)
S192
77 78
LOAD IN
LOAD OUT
61 60
HIGH REFELECT RATE/
WRITE PROTECT
LOW REFELECT RATE/
UN-PROTECT
3
90
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