Sony MXD-D5C Service Manual page 40

[YES]
9. Press the button to display "EFB =
Then, the optical pick-up moves to the pit area automatically
and servo is imposed.
10. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not turn the
(MD) knob.
Traverse Waveform
VC
Specified value : Below 10% offset value
Offset value (%) =
2 (A + B)
[YES]
11. Press the button to display "EF MO CHECK" (C14).
The disc stops rotating automatically.
[ EJECT]
12. Press the button and take out the disc.
A
13. Load the check disc (MD) TDYS-1.
[ AMS
14. Turn the
l L
CHECK" (C15).
[YES]
15. Press the button to display "EFB =
imposed automatically.
16. Observe the waveform of the oscilloscope, and check that the
specified value is satisfied. Do not turn the
(MD) knob.
Traverse Waveform
VC
Specified value : Below 10% offset value
Offset value (%) =
2 (A + B)
[YES]
17. Press the button to display "EF CD CHECK" (C15).
[ EJECT]
18. Press the button and take out the check disc (MD)
A
TDYS-1.
Checking Location: BD (MD) board (see page 45)
40
MO-P".
[ AMS
l
A
B
I A – B I
X 100
]
(MD) knob and display "EF CD
CD". Servo is
[ AMS
l
A
B
I A – B I
X 100
6-7. Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Procedure:
1. Load the test disc (MDW-74/GA-1).
] [
L 2. Turn the l
MODE" (C36).
[YES]
3. Press the
[MENU/NO]
4. Press the
displayed.
[
5. Turn the l
CHECK" (C16).
[YES]
6. Press the
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.
[YES]
7. Press the
Check that the C1 error is about 100 and ADER is below 2.
[YES]
8. Press the
Check that the C1 error is about 100 and ADER is below 2.
[MENU/NO]
9. Press the
and take out the test disc.
6-8. C PLAY Check
MO Error Rate Check
]
L
Checking Procedure:
1. Load the test disc (MDW-74/GA-1).
[
2. Turn the l
MODE" (C36).
[YES]
3. Press the
4. The display changes to "C =
5. If the C1 error rate is below 20, check that ADER is 00.
[MENU/NO]
6. Press the
[ EJECT]
button and take out the test disc.
A
CD Error Rate Check
Checking Procedure:
1. Load the check disc (MD) TDYS-1.
[
2. Turn the l
MODE" (C36).
[YES]
3. Press the
4. The display changes to "C =
5. Check that the C1 error rate is below 20.
[MENU/NO]
6. Press the
[ EJECT]
button and take out the check disc.
A
6-9. 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
MODE" (C37).
[YES]
3. Press the
4. When recording starts, lights up "
2 @@@@" (@@@@ is the address).
5. About 1 minute later, press the
continuous recording.
[
6. Turn the
l
MODE" (C36).
[YES]
7. Press the
8. "C = AD =
9. Check that the C1 error becomes below 20 and the AD error
below 2.
[MENU/NO]
10. Press the
[ EJECT]
A button and take out the disc.
AMS ]
L (MD) knob to display "CPLAY2
button to display "CPLAY2MID".
button when "C =
AMS ]
L (MD) knob to display "FBIAS
button to display " / c =
button to display " / b =
button to display " / a =
[ EJECT]
button, then press the A
AMS ]
L (MD) knob to display "CPLAY2
button to display "CPLAY2MID".
AD = ".
button to stop playback, then press the
AMS ]
L (MD) knob to display "CPLAY2
button to display "CPLAY2MID".
AD = ".
button to stop playback, then press the
AMS ]
L (MD) knob to display "CREC 2
button to display "CREC 2MID".
REC
" and display "CREC
[MENU/NO]
AMS ]
(MD) knob to display "CPLAY2
L
button to display "CPLAY2MID".
" will be displayed.
button to stop playback, then press the
AD = " is
".
".
".
button
button to stop