Sony MXD-D400 Operating Instructions (primary manual), Руководство по обслуживанию

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38
MXD-D400
5-7-8. C PLAY Check
MO Error Rate Check
Checking Procedure:
1. Load the test disk (MDW-74/GA-1).
2. Turn the
l AMS L (MD) knob to display “CPLAY 2
MODE” (C36).
3. Press the
[YES]
button to display “CPLAY 2MID”.
4. The display changes to “C = AD = ”.
5. If the C error rate is below 20, check that ADER is 00.
6. Press the
[MENU/NO]
button to stop playback, then press the
[EJECT]
button and take out the test disc.
CD Error Rate Check
Checking Procedure:
1. Load the check disc (MD) (TDYS-1).
2. Turn the
l AMS L
(MD) knob to display “CPLAY 2
MODE” (C36).
3. Press the
[YES]
button to display “CPLAY 2MID”.
4. The display changes to “C = AD = ”.
5. Check that the C error rate is below 20.
6. Press the
[MENU/NO]
button to stop playback, then press the
[EJECT]
button and take out the check disc.
5-7-9. Self-Recording/playback Check
Prepare a continuous recording disc using the unit to be repaired
and check the error rate.
Checking Procedure:
1. Load a recordable disc (blank disc).
2. Turn the
l AMS L (MD) knob to display
“CREC 2MODE” (C37).
3. Press the
[YES]
button to display “CREC 2MID”.
4. When recording starts, lights up “
REC
” and display “CREC
2 @@@@” (@@@@ is the address).
5. About 1 minute later, press the
[MENU/NO]
button to stop
continuous recording.
6. Turn the
l AMS L
(MD) knob to display “CPLAY 2
MODE” (C36).
7. Press the
[YES]
button to display “CPLAY 2MID”.
8. “C = AD = ” will be displayed.
9. Check that the C error becomes below 20 and the AD error
below 2.
10. Press the
[MENU/NO]
button to stop playback, then press the
[EJECT]
button and take out the disc.
8. Press the
[YES]
button to display “EFB = MO-P”.
Then, the optical pick-up moves to the pit area automatically
and servo is imposed.
9. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not turn the l AMS L (MD)
knob.
Traverse Waveform
10. Press the
[YES]
button to display “EF MO CHECK (C14)”.
The disc stops rotating automatically.
11. Press the
[EJECT]
button and take out the disc.
12. Load the check disc (MD) (TDYS-1).
13. Turn the
l
AMS
L (MD) knob and display “EF CD
CHECK” (C15).
14. Press the
[YES]
button to display “EFB = CD”. Servo is
imposed automatically.
15. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not turn the
l AMS L
(MD)
knob.
Traverse Waveform
16. Press the
[YES]
button to display “EF CD CHECK” (C15).
17. Press the
[EJECT]
button and take out the check disc (MD)
(TDYS-1).
Check Location: BD (MD) board (see page 43)
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
A
B
VC
Specified value : Below 10% offset value
Offset value (%) = X 100
IA – BI
2 (A + B)
5-7-7. Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Procedure:
1. Load the test disk (MDW-74/GA-1).
2. Turn the
l AMS L (MD) knob to display “CPLAY 2
MODE” (C36).
3. Press the
[YES]
button to display “CPLAY 2MID”.
4. Press the
[MENU/NO]
button when “C = AD = ” is
displayed.
5. Turn the l
AMS
L (MD) knob to display “FBIAS
CHECK” (C16).
6. Press the
[YES]
button to 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.
7. Press the
[YES]
button to display “ / b = ”.
Check that the C error is about 220 and ADER is below 2.
8. Press the
[YES]
button to display “ / a = ”.
Check that the C error is about 220 and ADER is below 2.
9. Press the
[MENU/NO]
button, then press the
[EJECT]
button
and take out the test disc.
5-8. INITIAL SETTING OF ADJUSTMENT
VALUE
Note:
Mode which sets the adjustment results recorded in the non-volatile
memory to the initial setting value. However the results of the tempera-
ture compensation offset adjustment will not change to the initial setting
value.
If initial setting is performed, perform all adjustments again excluding the
temperature compensation offset adjustment.
For details of the initial setting, refer to “5-5. Precautions for Adjustments”
and execute the initial setting before the adjustment as required.
Setting Procedure:
1. Turn the
l
AMS
L (MD) knob to display “ADJ CLEAR”
(C28).
2. Press the
[YES]
button. “Complete!” will be displayed mo-
mentarily and initial setting will be executed, after which “ADJ
CLEAR” (C28) will be displayed.