Sony MDS-JE480 Service Manual ▷ View online
29
MDS-JE480
7. Press the YES button and display “EFB =
MO-W”.
8. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the l AMS L
knob.
(Write power traverse checking)
knob.
(Write power traverse checking)
(Traverse Waveform)
11. Press the YES button display “EF MO CHECK”
The disc stops rotating automatically.
12. Press the A EJECT button and remove the disc.
13. Load the check disc (MD) TDYS-1.
14. Rotate the l AMS L knob and display “EF CD CHECK”
13. Load the check disc (MD) TDYS-1.
14. Rotate the l AMS L knob and display “EF CD CHECK”
(C04).
15. Press the YES button and display “EFB =
CD”. Servo is
imposed automatically.
9. Press the YES button display “EFB =
MO-P”.
Then, the optical pick-up moves to the pit area automatically
and servo is imposed.
and servo is imposed.
10. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the l AMS L
knob.
knob.
(Traverse Waveform)
Checking 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 l AMS L knob and display “EF MO CHECK”.
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)
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
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
VC
A
B
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
5-6-4. Auto Check
This test mode performs CREC and CPLAY automatically for
mainly checking the characteristics of the optical pick-up. To
perform this test mode, the laser power must first be checked.
Perform Auto Check after the laser power check and Iop compare.
mainly checking the characteristics of the optical pick-up. To
perform this test mode, the laser power must first be checked.
Perform Auto Check after the laser power check and Iop compare.
Procedure
1. Press the YES button. If “LDPWR
1. Press the YES button. If “LDPWR
” is displayed, it
means that the laser power check has not been performed. In
this case, perform the laser power check and Iop compare, and
then repeat from step 1.
this case, perform the laser power check and Iop compare, and
then repeat from step 1.
2. If a disc is in the mechanical deck, it will be ejected forcibly.
“DISC IN” will be displayed in this case. Load a test disc (MDW-
74/GA-1) which can be recorded.
74/GA-1) which can be recorded.
3. If a disk is loaded at step 2, the check will start automatically.
4. When “XX CHECK” is displayed, the item corresponding to
4. When “XX CHECK” is displayed, the item corresponding to
XX will be performed.
When “06 CHECK” completes, the disc loaded at step 2 will be
ejected. “DISC IN” will be displayed. Load the check disc (MD)
TDYS-1.
When “06 CHECK” completes, the disc loaded at step 2 will be
ejected. “DISC IN” will be displayed. Load the check disc (MD)
TDYS-1.
5. When the disc is loaded, the check will automatically be resumed
from “07 CHECK”.
6. After completing to test item 12, check OK or NG will be
displayed. If all items are OK, “CHECK ALL OK” will be
displayed. If any item is NG, it will be displayed as “NG:xxxx”.
displayed. If any item is NG, it will be displayed as “NG:xxxx”.
When “CHECK ALL OK” is displayed, it means that the optical
pick-up is normal. Check the operations of the other spindle motor,
thread motor, etc.
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.
pick-up is normal. Check the operations of the other spindle motor,
thread motor, etc.
When displayed as “NG:xxxx”, it means that the optical pick-up is
faulty. In this case, replace the optical pick-up.
5-6-5. Other Checks
All the following checks are performed by the Auto Check mode.
They therefore need not be performed in normal operation.
They therefore need not be performed in normal operation.
1. Load a continuously recorded test disc (MDW-74/GA-1).
(Refer to “5-5. Using the Continuously Recorded Disc”.)
5-6-6. Traverse Check
Connection :
VC
A
B
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
6. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the AMS knob.
(Read power traverse checking)
(Read power traverse checking)
(Traverse Waveform)
30
MDS-JE480
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 l AMS L knob and display “CPLAY1
MODE”.
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 test disc.
CD Error Rate Check
Checking Procedure :
1. Load a check disc (MD) TDYS-1.
2. Rotate the l AMS L knob and display “CPLAY1
1. Load a check disc (MD) TDYS-1.
2. Rotate the l AMS L knob and display “CPLAY1
MODE”.
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 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 l AMS L 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 l AMS L 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 1 (@@@@)” (@@@@ is the address), and recording
starts.
starts.
5. About 1 minute later, press the MENU/NO button to stop
continuous recording.
6. Rotate the l AMS L knob to display “C PLAY1 MODE”.
7. Press the YES button to display “C PLAY1 MID”.
8. “C =
7. Press the YES button to display “C PLAY1 MID”.
8. “C =
AD =
” will be displayed.
9. Check that the C error becomes below 50 and the AD error
below 2.
10. Press the MENU/NO button to stop playback, and press the A
EJECT button and remove the disc.
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 l AMS L knob and display “CPLAY1
MODE”.
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 and display “CPLAY1 MODE”.
6. Rotate the l AMS L knob and display “FBIAS CHECK”.
7. Press the YES button and display “
6. Rotate the l AMS L knob and display “FBIAS CHECK”.
7. Press the YES button and display “
/
c =
”.
The first four digits indicate the C error rate, the two digits after
[/] indicate ADER, 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 ADER, 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 test disc.
330 k
Ω
Oscilloscope
10pF
BD board
CN105 pin
4
(TE)
CN105 pin
6
(VC)
16. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not rotate the l AMS L
knob.
knob.
(Traverse Waveform)
17. Press the YES button and display “EF CD CHECK”.
18. Press the A EJECT button and remove the check disc (MD)
18. 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.
VC
A
B
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
31
MDS-JE480
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 l AMS L knob to display “ADJ CLEAR”.
2. Press the YES button. “Complete!” will be displayed momen-
1. Rotate the l AMS L 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 l AMS L knob and x button, con-
1. While pressing the l AMS L knob and x button, con-
nect the power plug to the outlet, and release the l AMS
L knob and x button.
L knob and x button.
2. Rotate the l AMS L knob to display “[Service]”, and
press the YES button.
3. Rotate the l AMS L 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 l AMS L knob.
To select the digit : Press the l AMS L knob
To select the digit : Press the l AMS L 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 l AMS L knob to display “Iop.Read”.
2. “@@.@/##.#” is displayed and the recorded contents are
1. Rotate the l AMS L knob to display “Iop.Read”.
2. “@@.@/##.#” is displayed and the recorded contents are
displayed.
@@.@ 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 l AMS L button or MENU/NO
button to display “Iop Read”.
5-9. TEMPERATURE COMPENSATION OFFSET
ADJUSTMENT
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 l AMS L knob and display “TEMP ADJUST”.
2. Press the YES button and select the “TEMP ADJUST” mode.
3. “TEMP =
1. Rotate the l AMS L 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 l AMS L knob and display “LDPWR
ADJUST”.
(Laser power : For adjustment)
(Laser power : For adjustment)
3. Press the YES button once and display “L 0.93 mW $
”.
4. Rotate the l AMS L knob so that the reading of the laser
power meter becomes the specified value. Press the YES
button after setting the range knob of the laser power meter, and
save the adjustment results. (“L SAVE $
button after setting the range knob of the laser power meter, and
save the adjustment results. (“L SAVE $
” will be displayed
for a moment.)
5. Then “L 7.25 mW $
” will be displayed.
6. Rotate the l AMS L knob so that the reading of the
laser power meter becomes the specified value, press the
YES button and save it.
YES button and save it.
Note : Do not perform the emission with 7.25 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)
32
MDS-JE480
7. Then, rotate the l AMS L knob and display “LDPWR
CHECK”.
8. Press the YES button once and display “L 0.93 mW $
”.
Check that the reading of the laser power meter become the speci-
fied value.
fied value.
9. Press the YES button once more and display “L 7.25 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 : L 0.93mW : 0.85-0.91mW (260B)
0.90-0.96mW (260E)
L 7.25mW : 6.90-7.10mW (260B)
7.20-7.30mW (260E)
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 l AMS L knob to display “Iop.Write”.
12. Press the YES button. When the display becomes Ref = @@@
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).
“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 l AMS L knob.
To select the digit : Press the l AMS L knob
To select the number : Rotate the l AMS L knob.
To select the digit : Press the l AMS L 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 “L 0.73 mW $
”, “L
6.40 mW $
”, and “L Wp
$
”. Nothing needs
to be performed here.
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 l AMS L knob and display “EF MO AD-
JUST”.
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 l AMS L knob so that the waveform of the
oscilloscope becomes the specified value.
(When the l AMS L knob is rotated, the
(When the l AMS L knob is rotated, the
of “EFB=
” changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the wave-
form so that the specified value is satisfied as much as possible.
(Read power traverse adjustment)
form 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 l AMS L knob so that the waveform of the
oscilloscope becomes the specified value.
(When the l AMS L knob is rotated, the
(When the l AMS L knob is rotated, the
of “EFB-
MO-W” changes and the waveform changes.) In this adjustment,
waveform varies at intervals of approx. 2%. Adjust the wave-
form so that the specified value is satisfied as much as possible.
(Write power traverse adjustment)
waveform varies at intervals of approx. 2%. Adjust the wave-
form 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.
servo 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
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 OP and when replacing the IC701.
Otherwise the OP 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 OP and when replacing the IC701.
Otherwise the OP check may deteriorate.
Note: Perform this function with the optical pick-up set at room
temperature.
Procedure
1. Rotate the l AMS L knob to display “Iop NV Save”
1. Rotate the l AMS L 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
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.
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
)
(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”.)
R
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