Sony MDS-JE640 Service Manual ▷ View online
25
5-6-8. C PLAY Check
MO Error Rate Check
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. The display changes to “C1 =
3. Press the YES button and display “CPLAY1 MID”.
4. The display changes to “C1 =
AD =
”.
5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the MENU/NO button, stop playback, press the A but-
6. Press the MENU/NO button, stop playback, press the A but-
ton, and test disc.
CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button twice and display “CPLAY1 MID”.
4. The display changes to “C1 =
1. Load a check disc (MD) TDYS-1.
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button twice and display “CPLAY1 MID”.
4. The display changes to “C1 =
AD =
”.
5. Check that the C1 error rate is below 20.
6. Press the MENU/NO button, stop playback, press the A but-
6. Press the MENU/NO button, stop playback, press the A but-
ton, and the test disc.
5-6-9. Self-Recording/playback Check
Prepare a continuous recording disc using the unit to be repaired
and check the error rate.
and check the error rate.
Checking Procedure :
1. Insert a recordable test disc (MDW-74/GA-1) into the unit.
2. Rotate the AMS knob to display “CREC1 MODE”.
3. Press the YES button to display the “CREC1 MID”.
4. When recording starts, “
1. Insert a recordable test disc (MDW-74/GA-1) into the unit.
2. Rotate the AMS knob to display “CREC1 MODE”.
3. Press the YES button to display the “CREC1 MID”.
4. When recording starts, “
REC
” is displayed, this becomes
“CREC (@@@@)” (@@@@ is the address), and recording
starts.
starts.
5. About 1 minute later, press the MENU/NO button to stop
continuous recording.
6. Rotate the AMS knob to display “C PLAY1 MODE”.
7. Press the YES button to display “C PLAY1 MID”.
8. “C1 =
7. Press the YES button to display “C PLAY1 MID”.
8. “C1 =
AD =
” will be displayed.
9. Check that the C1 error becomes below 20 and the AD error
below 2.
10. Press the MENU/NO button to stop playback, and press the
A button and remove the disc.
330 k
Ω
Oscilloscope
10pF
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
5-6-7. Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
Checking Procedure :
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. Press the MENU/NO button when “C =
3. Press the YES button and display “CPLAY1 MID”.
4. Press the MENU/NO button when “C =
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 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. Press the YES button and display “
/
b =
”.
Check that the C1 error is below 100 and ADER is below 2.
8. Press the YES button and display “
/
a =
”.
Check that the C1 error is below 100 and ADER is below 2.
9. Press the MENU/NO button, next press the A button, and
remove the test disc.
16. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the AMS knob.
(Traverse Waveform)
17. Press the YES button and display “EF CD CHECK”.
18. Press the A button and remove the check disc (MD) TDYS-1.
18. Press the A 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.
VC
A
B
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
26
5-7. INITIAL SETTING OF ADJUSTMENT VALUE
Note:
Mode which sets the adjustment results recorded in the non-vola-
tile memory to the initial setting value. However the results of the
temperature compensation offset adjustment will not change to the
initial setting value.
If initial setting is performed, perform all adjustments again ex-
cluding the temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions on Ad-
justments” and execute the initial setting before the adjustment as
required.
Mode which sets the adjustment results recorded in the non-vola-
tile memory to the initial setting value. However the results of the
temperature compensation offset adjustment will not change to the
initial setting value.
If initial setting is performed, perform all adjustments again ex-
cluding the temperature compensation offset adjustment.
For details of the initial setting, refer to “5-4. Precautions on Ad-
justments” and execute the initial setting before the adjustment as
required.
Setting Procedure :
1. Rotate the AMS knob to display “ADJ CLEAR”.
2. Press the YES button. “Complete!” will be displayed momen-
1. Rotate the AMS knob to display “ADJ CLEAR”.
2. Press the YES button. “Complete!” will be displayed momen-
tarily and initial setting will be executed, after which “ADJ
CLEAR” will be displayed.
CLEAR” will be displayed.
5-8. RECORDING AND DISPLAYING THE Iop
INFORMATION
The IOP data can be recorded in the non-volatile memory. The Iop
value on the label of the optical pick-up and the Iop value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
value on the label of the optical pick-up and the Iop value after the
adjustment will be recorded. Recording these data eliminates the
need to read the label on the optical pick-up.
Recording Procedure :
1. While pressing the AMS knob and x button, connect the
1. While pressing the AMS knob and x button, connect the
power plug to the outlet, and release the AMS knob and x
button.
button.
2. Rotate the AMS knob to display “[Service]”, and press the
YES button.
3. Rotate the AMS knob to display “Iop.Write”, and press the
YES button.
4. The display becomes Ref=@@@.@ (@ is an arbitrary number)
and the numbers which can be changed will blink.
5. Input the Iop value written on the optical pick-up.
To select the number : Rotate the AMS knob.
To select the digit : Press the AMS knob
To select the digit : Press the AMS knob
6. When the YES button is pressed, the display becomes
“Measu=@@@.@” (@ is an arbitrary number).
7. As the adjustment results are recorded for the 6 value. Leave it
as it is and press the YES button.
8. “Complete!” will be displayed momentarily. The value will be
recorded in the non-volatile memory and the display will be-
come “Iop Write”.
come “Iop Write”.
Display Procedure :
1. Rotate the AMS knob to display “Iop.Read”.
2. “@@.@/##.#” is displayed and the recorded contents are dis-
1. Rotate the AMS knob to display “Iop.Read”.
2. “@@.@/##.#” is displayed and the recorded contents are dis-
played.
@@.@ indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment
@@.@ indicates the Iop value labeled on the pick-up.
##.# indicates the Iop value after adjustment
3. To end, press the AMS button or MENU/NO button to display
“Iop Read”.
5-9. TEMPERATURE COMPENSATION OFFSET
ADJUTMENT
Save the temperature data at that time in the non-volatile memory
as 25 ˚C reference data.
Note :
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to
as 25 ˚C reference data.
Note :
1. Usually, do not perform this adjustment.
2. Perform this adjustment in an ambient temperature of 22 ˚C to
28 ˚C. Perform it immediately after the power is turned on when
the internal temperature of the unit is the same as the ambient
temperature of 22 ˚C to 28 ˚C.
the internal temperature of the unit is the same as the ambient
temperature of 22 ˚C to 28 ˚C.
3. When D101 has been replaced, perform this adjustment after
the temperature of this part has become the ambient tempera-
ture.
ture.
Adjusting Procedure :
1. Rotate the AMS knob and display “TEMP ADJUST”.
2. Press the YES button and select the “TEMP ADJUST” mode.
3. “TEMP =
1. Rotate the AMS knob and display “TEMP ADJUST”.
2. Press the YES button and select the “TEMP ADJUST” mode.
3. “TEMP =
[OK]” and the current temperature data will be
displayed.
4. To save the data, press the YES button.
When not saving the data, press the MENU/NO button.
5. When the YES button is pressed, “TEMP =
SAVE” will be
displayed and turned back to “TEMP ADJUST” display then.
When the MENU/NO button is pressed, “TEMP ADJUST”
will be displayed immediatelly.
When the MENU/NO button is pressed, “TEMP ADJUST”
will be displayed immediatelly.
Specified Value :
The “TEMP =
” should be within “E0 - EF”, “F0 - FF”, “00 -
0F”, “10 - 1F” and “20 - 2F”.
5-10. LASER POWER ADJUSTMENT
Check the Iop value of the optical pick-up before adjustments.
(Refer to 5-8. Recording and Displaying Iop Information.)
(Refer to 5-8. Recording and Displaying Iop Information.)
Connection :
Adjusting Procedure :
1. Set the laser power meter on the objective lens of the optical
1. Set the laser power meter on the objective lens of the optical
pick-up. (When it cannot be set properly, press the m button
or M button to move the optical pick-up.)
Connect the digital volt meter to CN105 pin 1 (I+3V) and
CN105 pin 2 (IOP).
or M button to move the optical pick-up.)
Connect the digital volt meter to CN105 pin 1 (I+3V) and
CN105 pin 2 (IOP).
2. Rotate the AMS knob and display “LDPWR ADJUST”.
(Laser power : For adjustment)
3. Press the YES button once and display “LD 0.9 mW $
”.
4. Rotate the AMS knob so that the reading of the laser power
meter becomes 0.85 to 0.91 mW. Press the YES button after
setting the range knob of the laser power meter, and save the
adjustment results. (“LD SAVE $
setting the range knob of the laser power meter, and save the
adjustment results. (“LD SAVE $
” will be displayed for a
moment.)
5. Then “LD 7.0 mW $
” will be displayed.
6. Rotate the AMS knob so that the reading of the laser power
meter becomes 6.9 to 7.1 mW, press the YES button and save
it.
it.
Note : Do not perform the emission with 7.0 mW more than 15
seconds continuously.
Laser power
meter
meter
Optical pick-up
objective lens
objective lens
Digital volt meter
BD board
CN105 pin
1
(I+3V)
CN105 pin
2
(IOP)
27
KMS
260B
20101
H0576
H0576
Iop = 57.6 mA in this case
Iop (mA) = Digital voltmeter reading (mV)/1 (
Iop (mA) = Digital voltmeter reading (mV)/1 (
Ω
)
7. Then, rotate the AMS knob and display “LDPWR CHECK”.
8. Press the YES button once and display “LD 0.9 mW $
8. Press the YES button once and display “LD 0.9 mW $
”.
Check that the reading of the laser power meter become 0.85 to
0.91 mW.
0.91 mW.
9. Press the YES button once more and display “LD 7.0 mW $
”. Check that the reading the laser power meter and digital
volt meter satisfy the specified value.
Note down the digital voltmeter reading value.
Note down the digital voltmeter reading value.
Specified Value :
Laser power meter reading : 7.0 ± 0.2 mW
Digital voltmeter reading : Optical pick-up displayed value ± 10%
Digital voltmeter reading : Optical pick-up displayed value ± 10%
(Optical pick-up label)
10. Press the MENU/NO button and display “LDPWR CHECK”
and stop the laser emission.
(The MENU/NO button is effective at all times to stop the
laser emission.)
(The MENU/NO button is effective at all times to stop the
laser emission.)
11. Rotate the AMS knob to display “Iop.Write”.
12. Press the YES button. When the display becomes
12. Press the YES button. When the display becomes
Ref=@@@.@ (@ is an arbitrary number), press the YES button
to display “Measu=@@@.@” (@ is an arbitrary number).
to display “Measu=@@@.@” (@ is an arbitrary number).
13. The numbers which can be changed will blink. Input the Iop
value noted down at step 9.
To select the number : Rotate the AMS knob.
To select the digit : Press the AMS knob
To select the number : Rotate the AMS knob.
To select the digit : Press the AMS knob
14. When the YES button is pressed, “Complete!” will be displayed
momentarily. The value will be recorded in the non-volatile
memory and the display will become “Iop Write”.
memory and the display will become “Iop Write”.
Note 1: After step 4, each time the YES button is pressed, the
display will be switched between “LD 0.7 mW $
”, “LD
6.2 mW $
”, and “LD Wp $
”. Nothing needs
to be performed here.
(For details of the method for checking
this value, refer to “5-8. Recording and
Displaying IOP Information”.)
this value, refer to “5-8. Recording and
Displaying IOP Information”.)
5-12. TRAVERSE ADJUSTMENT
Connection :
Adjusting Procedure :
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin
1. Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin
6
(VC) of the BD board.
2. Load a test disc (MDW-74/GA-1). (Refer to Note 1.)
3. Press the M button and move the optical pick-up outside the
3. Press the M button and move the optical pick-up outside the
pit.
4. Rotate the AMS knob and display “EF MO 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)
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-
MO-W”
changes and the waveform changes.) In this adjustment, wave-
form varies at intervals of approx. 2%. Adjust the waveform so
that the specified value is satisfied as much as possible.
(Write power traverse adjustment)
form varies 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)
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.
V : 0.5 V/div
H : 10 ms/div
Input : DC mode
H : 10 ms/div
Input : DC mode
Oscilloscope
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
VC
A
B
Specification A = B
VC
A
B
Specification A = B
R
5-11. Iop NV SAVE
Write the reference values in the nonvolatile memory to perform
“Iop compare”. As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the Optical pick-up and when replacing the
IC102. Otherwise the Optical pick-up check may deteriorate.
“Iop compare”. As this involves rewriting the reference values, do
not perform this procedure except when adjusting the laser power
during replacement of the Optical pick-up and when replacing the
IC102. Otherwise the Optical pick-up check may deteriorate.
Note: Perform this function with the optical pick-up set at room
temperature.
Procedure
1. Rotate the AMS knob to display “Iop NV Save” (C06).
2. Press the YES button and display “Iop [stop]”.
3. After the display changes to “Iop =xxsave?”, press the YES
1. Rotate the AMS knob to display “Iop NV Save” (C06).
2. Press the YES button and display “Iop [stop]”.
3. After the display changes to “Iop =xxsave?”, press the YES
button.
4. After “Complete!” is displayed momentarily, the display changes
to “Iop 7.0 mW”.
5. After the display changes to “Iop=yysave?”, press the YES
button.
6. When “Complete!” is displayed, it means that Iop NV saving
has been completed.
28
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)
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” is displayed. The disc stops rotating
automatically.
Next “EF MO ADJUS” is displayed. The disc stops rotating
automatically.
13. Press the A button and remove the disc.
14. Load the check disc (MD) TDYS-1.
15. Roteto AMS knob and display “EF CD ADJUS”.
16. Press the YES button and display “EFB =
14. Load the check disc (MD) TDYS-1.
15. Roteto AMS knob and display “EF CD ADJUS”.
16. Press the YES button and display “EFB =
CD”. Servo is
imposed automatically.
17. 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)
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 ADJUST” will be displayed.
Next “EF CD ADJUST” will be displayed.
19. Press the A 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/GA-1).
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. Press the MENU/NO button when “C1 =
1. Load a test disk (MDW-74/GA-1).
2. Rotate the AMS knob and display “CPLAY1 MODE”.
3. Press the YES button and display “CPLAY1 MID”.
4. Press the MENU/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.
220.
10. Press the YES button and display “
/
c =
”.
11. Check that the C1 error rate is below 20 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 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.
13. Press the A button to remove the test 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.
VC
A
B
Specification A = B
VC
A
B
Specification A = B
330 k
Ω
Oscilloscope
10pF
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
C1 error
220
b
c
a
Focus bias value
(F. BIAS)
(F. BIAS)
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