Sony MDS-JA333ES Service Manual ▷ View online
29
5-5. Creating Continuos Recorded Disc
• This disc is used in focus bias adjustment and error rate check.
The following describes how to create a continuos recording disc.
1. Load a disc (blank disc) commercially available.
the disc is loaded by pushing the tray.
2. Rotate the lAMSL knob and display “CREC 1MODE”
(C35).
3. Press the YES button to display “CMEC 1MID”.
“CREC1 (0300)” is displayed for a moment and recording starts.
4. Complete recording within 5 minutes.
5. Press the MENU/NO button to stop recording.
6. Press the A button to eject the disc.
5. Press the MENU/NO button to stop recording.
6. Press the A button to eject the disc.
The above has been how to create a continuos recording data for
the focus bias adjustment and error rate check.
Note:
• Be careful not to apply vibration during continuos recording.
the focus bias adjustment and error rate check.
Note:
• Be careful not to apply vibration during continuos recording.
5-6. Check before Repairing
This check aims at locating the approximate position of cause of
trouble before starting to replace parts using specifications.
For detailed information, refer to [Checks before Part Replacement
and Adjustment] of Service note.
trouble before starting to replace parts using specifications.
For detailed information, refer to [Checks before Part Replacement
and Adjustment] of Service note.
5-6-1. Temperature Compensation Offset Check
Before adjustment, set the internal temperature and the ambient
temperature are between 22 and 28
temperature are between 22 and 28
°
C.
Checking procedure:
1. Rotate the lAMSL knob to display “TEMP CHECK”
1. Rotate the lAMSL knob to display “TEMP CHECK”
(C12).
2. Press the YES button.
3. It is OK when “T=@@(##)[OK” appears. It is NG when
3. It is OK when “T=@@(##)[OK” appears. It is NG when
“T=@@(##)[NG” appears. (@@ is the current value. ## is the
value that is written in the non-volatile memory.)
value that is written in the non-volatile memory.)
5-6-2. Laser Power Check
Before check:
Before check:
• Refer to Section 1 “Service note” How to open the disc tray when
power switch is turned off, and laser power check.
• Check the IOP value of optical pick-up. (Refer to Section 5-8
“Recording and displaying the IOP information”.)
Connection:
Checking procedure:
1. Insert the laser power meter from the disc inlet and set it on the
objective lens of the optical pick-up. (When it cannot be set
properly, press the m button and M button to move the
optical pick-up.)
Connect the digital voltmeter to CN110 5-pin (I+3V) and the
CN110 4-pin (IOP).
properly, press the m button and M button to move the
optical pick-up.)
Connect the digital voltmeter to CN110 5-pin (I+3V) and the
CN110 4-pin (IOP).
2. Rotate the lAMSL knob to display “LDPWR CHECK”
(C13).
3. Press the YES button once to display “LD 0.9mW $ ”.
Confirm that the reading of the laser power meter is 0.84 to
0.92 mW.
0.92 mW.
4. Press the YES button once again to display “LD 7.0mW $ ”.
Confirm that the readings of the laser power meter and digital
bolt meter satisfy the specified value.
bolt meter satisfy the specified value.
5. Then press the YES button once again to display “LD
6.2mW $ ”.
Specification:
Laser power meter reading: 7.0 ± 0.2 mW
Digital bolt meter reading: Optical pick-up displayed value ± 10 %
Laser power meter reading: 7.0 ± 0.2 mW
Digital bolt meter reading: Optical pick-up displayed value ± 10 %
6. Press the MENU/NO button to display “LDPWR CHECK”
(C13) and stop 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.)
Note 1
: After step 4, the display of “LD 0.7mW$ ” “LD
6.2mW$ ”, “LD Wp $ ” is switched every
time when pressing the YES button. Operation is not
necessary for these displays.
time when pressing the YES button. Operation is not
necessary for these displays.
Laser power meter
Optical pick-up
objective lens
Digital voltmeter
CN110
5
-pin (I+3V)
CN110
4
-pin (IOP)
BD board
KMS
260B
24391
H0528
(For the checking procedure of
this value, refer to Section 5-8
“Recording and displaying the
IOP information”.)
this value, refer to Section 5-8
“Recording and displaying the
IOP information”.)
IOP = 52.8 mA in this case
IOP (mA) = digital bolt meter reading (mV)/1 (W)
IOP (mA) = digital bolt meter reading (mV)/1 (W)
(Optical pick-up label)
30
5-6-3. Traverse Check
Note 1 : If the recorded disc is used for this adjustment, the
data is deleted.
Note 2 : If the traverse waveform is not clear, connect the
oscilloscope as shown below so that it can be seen more
clearly.
clearly.
Connection:
Checking procedure:
1. Connect the oscilloscope to the CN110 3-pin (TEO) and the
CN110 1-pin (VC) of the BD board.
2. Load a recordable disc (any available on the market). (Refer to
Note 1.)
The disc is loaded by pushing the tray.
The disc is loaded by pushing the tray.
3. Press the M button to move the optical pick-up outside the
pit.
4. Rotate the lAMSL knob to display “EF MO CHECK”
(C14).
5. Press the YES button to display “EFB = MO-R”.
(Laser power READ power, focus servo ON, tracking servo OFF,
and spindle (S) servo ON are set)
and spindle (S) servo ON are set)
6. Observe the waveform of the oscilloscope and confirm it is
within the specified value. Do not rotate the lAMSL
knob at that time.
(Read power traverse check)
knob at that time.
(Read power traverse check)
7. Press the YES button to display “EFB = MO-W”.
Oscilloscope (DC range)
CN110
3
-pin (TEO)
CN110
1
-pin (VC)
BD board
330k
Ω
10pF
Oscilloscope (DC range)
CN110
3
-pin (TEO)
CN110
1
-pin (VC)
BD board
V : 0.5V/div
H : 10ms/div
H : 10ms/div
Specification: Offset value 10% or less
Offset value % =
AB
×
100
(Traverse Waveform)
VC
2(A+B)
A
B
8. Observe the waveform of the oscilloscope and confirm it that is
within the specified value. Do not rotate the lAMSL
knob at this time.
(Write power traverse check)
knob at this time.
(Write power traverse check)
9. Press the YES button to display “EFB = MO-P”. The
optical pick-up moves to the internal circumference of the pit
area automatically and servo is imposed.
area automatically and servo is imposed.
10. Observe the waveform of the oscilloscope and confirm that it is
within the specified value. Do not rotate the lAMSL
knob at this time.
knob at this time.
11. Press the YES button to display “EF MO CHECK” (C14).
The disc stops rotating automatically.
12. Press the A button to eject the disc.
13. Load the check disc (MD) TDYS-1.
14. Rotate the lAMSL knob to display “EF CD CHECK”
13. Load the check disc (MD) TDYS-1.
14. Rotate the lAMSL knob to display “EF CD CHECK”
(C15).
15. Press the YES button to display “EFB = CD”. The servo is
imposed automatically.
16. Observe the waveform of the oscilloscope and confirm that it is
within the specified value. Do not rotate the lAMSL
knob at this time.
knob at this time.
17. Press the YES button to display “EF CD CHECK” (C15).
18. Press the A button to eject the check disc (MD) TDYS-1.
18. Press the A button to eject the check disc (MD) TDYS-1.
Specification: Offset value 10% or less
Offset value % =
AB
×
100
(Traverse Waveform)
VC
2(A+B)
A
B
Specification: Offset value 10% or less
Offset value % =
AB
×
100
(Traverse Waveform)
VC
2(A+B)
A
B
Specification: Offset value 10% or less
Offset value % =
AB
×
100
(Traverse Waveform)
VC
2(A+B)
A
B
31
5-6-4. Focus Bias Check
Change the focus bias to check the focus tolerance amount.
Checking procedure:
1. Load the test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display “CPLAY1MODE”
(C34).
3. Press the YES button to display “CPLAY1MID”.
4. After “C = AD = ” appears, press the MENU/NO
4. After “C = AD = ” appears, press the MENU/NO
button.
5. Rotate the lAMSL knob to display “FBIAS CHECK”
(C16).
6. Press the YES button to display “ / c = ”.
The first four digits indicate the C1 error rate, the two digits
after “/” indicate ADER, and the two digits after “c = “ indicate
the focus bias amount.
Confirm that the C1 error is below 220 and the ADER is below
2.
after “/” indicate ADER, and the two digits after “c = “ indicate
the focus bias amount.
Confirm that the C1 error is below 220 and the ADER is below
2.
7. Press the YES button to change the display to “ / b
= ”.
Confirm that the C1 error is below 220 and the ADER is below
2.
Confirm that the C1 error is below 220 and the ADER is below
2.
8. Press the YES button to change the display to “ / a
= ”.
Confirm that the C1 error is below 220 and the ADER is below
2.
Confirm that the C1 error is below 220 and the ADER is below
2.
9. Press the MENU/NO button and press the A button to eject
the test disc.
5-6-5. C PLAY Check
MO Error rate check
Checking procedure:
MO Error rate check
Checking procedure:
1. Load a test disc (MDW-74/GA-1).
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display “CPLAY1MODE”
(C34).
3. Press the YES button to display “CPLAY1MID”.
4. The display is changed to “C = AD = ”.
5. Confirm that the C1 error rate is below 80 and the ADER is
4. The display is changed to “C = AD = ”.
5. Confirm that the C1 error rate is below 80 and the ADER is
below 2.
6. Press the MENU/NO button to stop playing back. Press the A
button to eject the test disc.
CD Error rate check
Checking procedure:
Checking procedure:
1. Load a check disc (TDYS-1).
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display “CPLAY1MODE”
(C34).
3. Press the YES button to display “CPLAY1MID”.
4. The display is changed to “C = AD = ”.
5. Confirm that the C1 error rate is below 50.
6. Press the MENU/NO button to stop playing back. Press the A
4. The display is changed to “C = AD = ”.
5. Confirm that the C1 error rate is below 50.
6. Press the MENU/NO button to stop playing back. Press the A
button to eject the check disc.
5-6-6. Self Record/Playback Check
• The error rate is checked using the self record/playback disc.
Manufacture the self record/playback disc by user locally using
the MDS-JA333ES that is going to be measured of its error rate
by means of continuous recording.
the MDS-JA333ES that is going to be measured of its error rate
by means of continuous recording.
Checking procedure:
1. Load a recordable disc (blank disc) into the unit.
The disc is loaded by pushing the tray.
2. Rotate the lAMSL knob to display “CREC 1MODE”
(C35).
3. Press the YES button to display “CREC 1MID”.
4. When recording starts, the message appears and the
4. When recording starts, the message appears and the
message changed to “CREC (@@@@” (@@@@ is an address)
and recording starts.
and recording starts.
5. After one minute, press the MENU/NO button to stop continuos
recording.
6. Rotate the lAMSL knob to display “CPLAY1MODE”
(C34).
7. Press the YES button to display “CPLAY1MID”.
8. Display “C = AD = ”.
9. Confirm that the C1 error rate is below 80 and the AD error rate
8. Display “C = AD = ”.
9. Confirm that the C1 error rate is below 80 and the AD error rate
is below 2.
10. Press the MENU/NO button to stop playing back. Press the A
button to eject the check disc.
5-7. Returning to Initial Setup of Adjustment Value
Note:
The adjustment result that is stored in the non-volatile memory is
all cleared and returned to the initial setup value when procedure is
performed. However, the adjustment result of the temperature
compensation offset adjustment remains unchanged.
When this procedure is performed, be sure to perform all adjustments
from very beginning to the end again except the temperature
compensation offset adjustment. Perform this procedure as
necessary before starting adjustment referring to section “5-4.
Precautions for Adjustments”.
The adjustment result that is stored in the non-volatile memory is
all cleared and returned to the initial setup value when procedure is
performed. However, the adjustment result of the temperature
compensation offset adjustment remains unchanged.
When this procedure is performed, be sure to perform all adjustments
from very beginning to the end again except the temperature
compensation offset adjustment. Perform this procedure as
necessary before starting adjustment referring to section “5-4.
Precautions for Adjustments”.
Setting procedure:
1. Rotate the lAMSL knob to display “ADJ CLEAR”
(C28).
2. After pressing the YES button, “Complete!” appears for a
moment and the initial setting is started. Then, “ADJ CLEAR”
(C28) appears.
(C28) appears.
REC
32
5-8. Recording and Displaying the IOP Information
The IOP data that is indicated on the pick-up, can be saved in the
non-volatile memory of the MDS-JA333ES. The IOP data that is
printed on the optical pick-up and the IOP data after adjustment is
completed can be saved in the memory. Saving the IOP data in the
memory eliminates the needs to look at the printed value on the
label that is attached on the surface of optical pick-up, and enables
to view the IOP data on display.
non-volatile memory of the MDS-JA333ES. The IOP data that is
printed on the optical pick-up and the IOP data after adjustment is
completed can be saved in the memory. Saving the IOP data in the
memory eliminates the needs to look at the printed value on the
label that is attached on the surface of optical pick-up, and enables
to view the IOP data on display.
Recording procedure:
1. Rotate the lAMSL knob to display “Iop Write” (C05).
Press the YES button.
2. “Ref=@@@.@” (@ is arbitrary number.) appears and the values
that can be changed flash.
3. Input the value of IOP that is written in the optical pick-up.
Selecting figure: Rotate the lAMSL knob.
Selecting digit : Press the lAMSL knob.
Selecting digit : Press the lAMSL knob.
4. Press the YES button and “Measu=@@@.@” (@ is arbitrary
number.) appears.
5. The value of step 4 is used to record the adjustment result, so
press the YES button.
6. “Complete!” appears for a moment, and the value is recorded
in the non-volatile memory. Then, “Iop Write” (C05) appears.
Displaying procedure:
1. Rotate the lAMSL knob to display “Iop Read” (C26)
and press the YES button.
2. “@@.@/##.#” appears and the contents that is recorded are
displayed.
@@.@: The value of IOP that is described in pick-up
##.#: The value of IOP after adjustment
@@.@: The value of IOP that is described in pick-up
##.#: The value of IOP after adjustment
3. When the display is completed, press the lAMSL knob
or MENU/NO button to display “Iop Read” (C26).
5-9. Temperature Compensation Offset
Adjustment
The temperature data at 25
°
C is used as the reference data and is
saved in the non-volatile memory for offset adjustment.
Note.
1. Do not perform this adjustment normally.
2. Perform this adjustment under the ambient temperature in the
1. Do not perform this adjustment normally.
2. Perform this adjustment under the ambient temperature in the
range of 22 to 28
°
C. Perform this adjustment immediately after
the main power is turned on in which the internal temperature
of MDS-JA333ES is still the same as the ambient temperature.
of MDS-JA333ES is still the same as the ambient temperature.
3. After replacing the D101, wait the until the temperature of the
parts become the same as the ambient temperature and perform
this adjustment.
this adjustment.
Checking procedure:
1. Rotate the lAMSL knob to display “TEMP ADJUS”
(C03).
2. Press the YES button and select the “TEMP ADJUS” (C03) mode.
3. “TEMP= [OK” and the current temperature data appear.
4. When the data is saved: Press the YES button
3. “TEMP= [OK” and the current temperature data appear.
4. When the data is saved: Press the YES button
When the data is not saved: Press the MENU/NO button
5. When the YES button is pressed, “TEMP = SAVE” and
“TEMP ADJUS” (C03) appear.
When the MENU/NO button is pressed, the display is changed
to “TEMP ADJUS” (C03) immediately.
When the MENU/NO button is pressed, the display is changed
to “TEMP ADJUS” (C03) immediately.
Specified value:
The value of TEMP = is within E0 to EF, F0 to FF, 00 to 0F, 10
to 1F, and 20 to 2F.
to 1F, and 20 to 2F.
5-10. Laser Power Adjustment
Before adjustment:
Confirm the IOP value of optical pick-up. (Refer to Section 5-8
“Recording and displaying the IOP information”.)
“Recording and displaying the IOP information”.)
Connection:
Adjustment procedure:
1. Insert the laser power meter from the disc inlet and set it on the
objective lens of the optical pick-up. (When it cannot be set
properly, press the m button and M button to move the
optical pick-up.)
Connect the digital voltmeter to CN110 5-pin (I+3V) and the
CN110 4-pin (IOP).
properly, press the m button and M button to move the
optical pick-up.)
Connect the digital voltmeter to CN110 5-pin (I+3V) and the
CN110 4-pin (IOP).
Laser power meter
Optical pick-up
objective lens
Digital voltmeter
CN110
5
-pin (I+3V)
CN110
4
-pin (IOP)
BD board
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