Sony MDS-JE780 Service Manual ▷ View online
31
MDS-JE780
12. Press the YES button, and save the adjustment results in the
non-volatile memory. (“EFB =
SAVE” will be displayed for
a moment.)
Next “EF MO ADJUS” (C07) is displayed. The disc stops ro-
tating automatically.
Next “EF MO ADJUS” (C07) is displayed. The disc stops ro-
tating automatically.
13. Press the A EJECT button and remove the disc.
14. Load the check disc (MD) TDYS-1.
15. Rotate l AMS L knob and display “EF CD ADJUS”
14. Load the check disc (MD) TDYS-1.
15. Rotate l AMS L knob and display “EF CD ADJUS”
(C08).
16. Press the YES button and display “EFB =
CD”. Servo is
imposed automatically.
17. Rotate the l AMS L 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)
18. Press the YES button, display “EFB =
SAVE” for a mo-
ment and save the adjustment results in the non-volatile memory.
Next “EF CD ADJUS” (C08) will be displayed.
Next “EF CD ADJUS” (C08) will be displayed.
19. Press the A EJECT 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.
5-13. FOCUS BIAS ADJUSTMENT
Adjusting Procedure :
1. Load a test disk (MDW-74/GA1).
2. Rotate the l AMS L knob and display “CPLAY1 MODE”
1. Load a test disk (MDW-74/GA1).
2. Rotate the l AMS L knob and display “CPLAY1 MODE”
(C34).
3. Press the YES button and display “CPLAY1 MID”.
4. The display change to “C =
4. The display change to “C =
AD =
”.
5. Press the MENU/NO button.
6. Rotate the l AMS L knob and display “FBIAS ADJUS”
6. Rotate the l AMS L knob and display “FBIAS ADJUS”
(C09).
7. Press the YES button and display “
/
a =
”.
The first four digits indicate the C error rate, the two digits after
[/] indicate ADER, and the 2 digits after [a =] indicate the focus
bias value.
[/] indicate ADER, and the 2 digits after [a =] indicate the focus
bias value.
8. Rotate the l AMS L knob in the clockwise direction and
find the focus bias value at which the C error rate becomes 200
(Refer to Note 2).
(Refer to Note 2).
9. Press the YES button and display “
/
b =
”.
10.Rotate the l AMS L knob in the counterclockwise di-
rection and find the focus bias value at which the C error rate
becomes 200.
becomes 200.
VC
A
B
Specification A = B
330 k
Ω
Oscilloscope
10pF
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
C error
200
b
c
a
Focus bias value
(F. BIAS)
(F. BIAS)
11. Press the YES button and display “
/
c =
”.
12. Check that the C error rate is below 50 and ADER is 2. Then
press the YES button.
13. If the “(
” in “
-
-
(
” is above 20, press the YES
button.
If below 20, press the MENU/NO button and repeat the
adjustment from step 2.
If below 20, press the MENU/NO button and repeat the
adjustment from step 2.
14. Press the A EJECT button to remove the test disc.
Note 1 : The relation between the C 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 C error rate changes, perform the adjustment using
the average vale.
5-14. ERROR RATE CHECK
5-14-1. CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the l AMS L knob and display “CPLAY 1MODE”
1. Load a check disc (MD) TDYS-1.
2. Rotate the l AMS L knob and display “CPLAY 1MODE”
(C34).
3. Press the YES button twice and display “CPLAY1 MID”.
4. The display changes to “C =
4. The display changes to “C =
AD =
”.
5. Check that the C error rate is below 50.
6. Press the MENU/NO button, stop playback, press the A EJECT
6. Press the MENU/NO button, stop playback, press the A EJECT
button, and remove the test disc.
5-14-2. MO Error Rate Check
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA1).
1. Load a continuously recorded test disc (MDW-74/GA1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the l AMS L knob and display “CPLAY 1 MODE”
(C34).
3. Press the YES button and display “CPLAY1 MID”.
4. The display changes to “C =
4. The display changes to “C =
AD =
”.
5. If the C error rate is below 50, check that ADER is 2.
6. Press the MENU/NO button, stop playback, press the A EJECT
6. Press the MENU/NO button, stop playback, press the A EJECT
button, and remove the test disc.
32
MDS-JE780
NOTE:It is useful to use the jig. for checking the waveform. (Refer
to Servicing Note on page 6.)
[BD BOARD] (SIDE B)
5-17. ADJUSTING POINTS AND CONNECTING
POINTS
POINTS
[BD BOARD] (SIDE A)
5-16. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the Optical pick-up is re-
placed.
If the adjustment results becomes “Adjust NG!”, the Optical pick-
up may be faulty or the servo system circuits may be abnormal.
placed.
If the adjustment results becomes “Adjust NG!”, the Optical pick-
up may be faulty or the servo system circuits may be abnormal.
5-16-1. CD Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Insert the check disc (MD) TDYS-1.
2. Rotate the l AMS L knob to display “AG Set (CD)”
1. Insert the check disc (MD) TDYS-1.
2. Rotate the l AMS L knob to display “AG Set (CD)”
(C11).
3. When the YES button is pressed, 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. Press the A EJECT button to remove the disc.
5-16-2. MO Auto Gain Control Output Level Adjustment
Adjusting Procedure :
1. Insert the reference disc (MDW-74/GA-1) for recording.
2. Rotate the l AMS L knob to display “AG Set (MO)”
1. Insert the reference disc (MDW-74/GA-1) for recording.
2. Rotate the l AMS L knob to display “AG Set (MO)”
(C10).
3. When the YES button is pressed, 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. Press the A EJECT button to remove the disc.
D101
CN101
IC803
12
1
CN103
CN102
CN105
IC701
IC201
IC101
IC195
IC933
1
41
58
1
1
7
27
23
1
3
1
30
90
61
1
3
5
4
24
13
37
48
4
1
5
8
31
60
1
12
36
25
120
91
5-15. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA1).
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the l AMS L knob and display “CPLAY 1MODE”
(C34).
3. Press the YES button twice and display “CPLAY1 MID”.
4. The display change to “C =
4. The display change to “C =
AD =
”.
5. Press the MENU/NO button.
6. Rotate the l AMS L knob and display “FBIAS CHECK”
6. Rotate the l AMS L knob and display “FBIAS CHECK”
(C16).
7. Press the YES button and display “
/
c =
”.
The first four digits indicate the C error rate, the two digits after
[/] indicate ADR, and the 2 digits after [c =] indicate the focus
bias value.
Check that the C error is below 50 and ADER is below 2.
[/] indicate ADR, and the 2 digits after [c =] indicate the focus
bias value.
Check that the C error is below 50 and ADER is below 2.
8. Press the YES button and display “
/
b =
”.
Check that the C error is below 100 and ADER is below 2.
9. Press the YES button and display “
/
a =
”.
Check that the C error is below 100 and ADER is below 2
10.Press the MENU/NO button, next press the A EJECT button,
and remove the continuously recorded disc.
Note 1 : If the C error and ADER are above other than the speci-
fied value at points a (step 9. in the above) or b (step 8. in
the above), the focus bias adjustment may not have been
carried out properly. Adjust perform the beginning again.
the above), the focus bias adjustment may not have been
carried out properly. Adjust perform the beginning again.
33
33
MDS-JE780
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed
in each block.)
For schematic diagrams.
Note:
• All capacitors are in
µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
• C : panel designation.
For printed wiring boards.
Note:
• X : parts extracted from the component side.
• Y : parts extracted from the conductor side.
•
• Y : parts extracted from the conductor side.
•
a
: Through hole.
•
: Pattern from the side which enables seeing.
(The other layers' patterns are not indicated.)
• A : B+ Line.
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
• B : B– Line.
• H : adjustment for repair.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : STOP
(
)
: PLAY
<
>
: REC
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
j
: REC
l : REC (DIGITAL IN)
p : PLAY (DIGITAL OUT)
p : PLAY (DIGITAL OUT)
• Abbreviation
SP
: Singapore model
RU
: Russian model
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
C
B
These are omitted.
E
Q
B
These are omitted.
C
E
B
These are omitted.
C
E
Note:
The components identified by mark 0 or dotted
line with mark 0 are critical for safety.
Replace only with part number specified.
line with mark 0 are critical for safety.
Replace only with part number specified.
• WAVEFORMS
– MAIN Board –
– BD Board –
2
IC101
ef
(FE)
(Play mode)
4
IC803
1
(XIN)
5
IC201
w;
(OSCO)
6
IC201
ef
(LRCK)
7
IC201
eg
(XBCK)
3
IC101
ek
(RF)
1.2Vp-p
0.1Vp-p
1
IC101
wh
(TE)
(Play mode)
1.5Vp-p
On track jumping
2Vp-p
11.2896 MHz
2.5Vp-p
90.3 MHz
3.2Vp-p
23
µ
sec
0.36
µ
sec
3.2Vp-p
1
IC1 qd (XOUT)
2
IC500 8 (XTO)
3.0Vp-p
4.5Vp-p
10 MHz
11.2896 MHz
– DISPLAY Board –
1
IC760 yh (OSC0)
3.2Vp-p
0.47
µsec
SECTION 6
DIAGRAMS
6-1. CIRCUIT BOARDS LOCATION
KEY-SW board
PT board
MAIN board
BD board
DISPLAY board
KB board
HP board
USB board
VOL SEL board (SP model only)
– USB Board –
1
IC201 rj (XTAL)
3.7Vp-p
12MHz
Ver. 1.2
MDS-JE780
34
34
6-2. BLOCK DIAGRAMS – BD SECTION –
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-260B/260E)
(KMS-260B/260E)
LD DRIVER
Q202, 203
Iop MONITOR
AMP
IC701
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
OUT1F
OUT1R
FCS+
FCS–
TRK+
TRK–
2-AXIS
DEVICE
(TRACKING)
(FOCUS)
IN4R
IN4F
IN2F
IN2R
IN3F
IN3R
IN1F
IN1R
MOD
SPFD
SPRD
APCREF
SFDR
SRDR
FFDR
FRDR
TFDR
TRDR
PSB
FROM CPU
INTERFACE
DIGITAL SERVO
SIGNAL PROCESSOR
IC201 (2/2)
PRWR
AUX1
ABCD
FE
TE
SE
PEAK
BOTM
XLRF
CKRF
DTRF
XLAT
SCLK
SWDT
FILI
PCO
CLTV
FILO
EFMO
ADDT
DATAI
NC
D+3V
DIN1
IC151 (1/2)
TX
ASYO
ASYI
RFI
SCTX
EFMO
HR901
OVER WRITE HEAD
ADFG
F0CNT
SPFD
SPRD
SAMPLING
RATE
CONVERTER
DIGITAL
AUDIO
INTERFACE
DIN0
DOUT
OSCN
DIGITAL SIGNAL PROCESSOR,
EFM/ACIRC ENCODER/DECODER,
MEMORY CONTROLLER,
ATRAC ENCODER/DECODER
IC201 (1/2)
INTERNAL BUS
DADT
XBCK
LRCK
FS256
OSCI
OSCO
DQSY
SQSY
XINT
SENS
XRST
SRDT
SWDT
SCLK
XLAT
MNT0
MNT1
MNT2
MNT3
SHOCK
XBUSY
SWDT
SCLK
XLATCH
SELECT
MNT1 (SHOCK)
MNT2 (XBUSY)
DIG-RST
SQSY
DQSY
LDON
NC
NC
IOP
WRPWR
MOD
XINT
SENS
SRDT
LDIN
LDOUT
IN1
IN2
OUT1
OUT2
VZ
LOADING
MOTOR DRIVE
IC461
M103
(LOADING)
D+3V
DQ1 – DQ4
A0 – A9
D0 – D3
A00 – A09
XOE
XWE
XRAS
XCAS
OE
WE
RAS
CAS
D-RAM
IC153
CLOCK
GENERATOR
IC803
DIN1
SYSTEM CONTROLLER
IC1 (1/2)
HF MODULE
ADDT
(Page 35)
(Page 35)
(Page 35)
(Page 35)
(Page 35)
SP
AEP, UK, RU
DIN1, LRCKI, DATAI, XBCKI
DATAI
XBCKI
LRCKI
DADT, BCK, LRCK
SWDT, SCLK
SWDT
REFLECT
PROTECT
LD-LO
SDA
SCL
EEP-WP
UNREG
+12V
65
LIMIT-IN
OUT-SW
S101
(LIMIT IN)
PLAY-SW
• SIGNAL PATH
• Abbreviation
SP : Singapore model
RU : Russian model
SP : Singapore model
RU : Russian model
: PLAY (ANALOG OUT)
: REC (ANALOG IN)
: REC (ANALOG IN)
: REC (DIGITAL IN)
S103
(OUT SW)
S104
(PLAY SW)
REC-SW
S105
(REC POSITION)
XBCKI
LRCKI
S102
(REFLECT/PROTECT DETECT)
HIGH REFELECT RATE/
WRITE PROTECT
LOW REFELECT RATE/
UN-PROTECT
OVER WRITE
HEAD DRIVE
IC181
, Q181, 182
WAVE SHAPER
IC641
SELECTOR
IC651
OPTICAL
RECEIVER
IC611
OPTICAL
RECEIVER
IC621
OPTICAL
TRANSMITTER
IC631
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
4
3
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
108
107
104
105
103
102
98
97
100
15
80 78 79 86 85 76 77
99
27
25
12
10
21
23
19
18
14
15
29
30
3
4
16
M
M
M
SERVO
DSP
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
110 109
14 13
16 12 11 10
6 7 8
1 2 3 4
38
37
19
36
21
34
35
33
26
25
24
28
29
27
32
20
5
1
47
46
22
3
4
23
17
ADIP
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
PLL
(X8)
CLKA
XIN
18
57
89
52
52
54
56
20
25
58 32
33 50
59 48
80
31
CLOCK
GENERATOR
43, 45, 44, 42
1, 2, 24, 25
48, 49, 51 – 56, 59, 60
5, 9 – 12, 14 – 18
C
B
A
E
67 66
5
6
4
VCC2 8
VCC1 7
SCL
WP
6
7
SDA
5
45
60
2
10
55
49
51
53
61
44
M
REFERENCE
VOLTAGE SWITCH
Q461,462
+5V
D+3V
A+3V
+3.3V
REG.
IC933
D+2.5V
+2.6V
REG.
IC926
EEPROM
IC195
47
PWM GENERATOR
SCLK
13
11
10
8
9
6
4
3
4
1
13
5
10
2
1
12
D
IN
IN
IN
J601
COAXIAL
OUT
OPTICAL
DIGITAL
Ver. 1.2
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