Sony MDS-S50 - Manual (Page 31)

31
MDS-S50
5-14. ERROR RATE CHECK
5-14-1. CD Error Rate Check
Procedure:
1. Load the check disc (TDYS-1).
2. Turn the
[ AMS ] knob to display “CPLAY1MODE”
(C34).
3. Press the [YES] button twice and display “CPLAY1MID”.
4. The display changes to “C = AD = )”.
5. Check that the C1 error rate is below 20.
6. Press the
[MENU/NO] button to stop playback, then press
the Z button and take out the check disc (TDYS-1).
5-14-2. MO Error Rate Check
Procedure:
1. Load the continuously-recorded disc. (Refer to “5-5. USING
THE CONTINUOUSLY RECORDED DISC” (See page 25))
2. Turn the [ AMS ] knob to display “CPLAY1MODE”
(C34).
3. Press the [YES] button to display “CPLAY1MID”.
4. The display changes to “C = AD = )”.
5. If the C1 error rate is below 20, check that ADER is 00.
6. Press the
[MENU/NO] button to stop playback, then press
the Z button and take out the disc.
5-15. FOCUS BIAS CHECK
Change the focus bias and check the focus tolerance amount.
Procedure:
1. Load the continuously-recorded disc. (Refer to “5-5. USING
THE CONTINUOUSLY RECORDED DISC” (See page 25))
2. Turn the [ AMS ] knob to display “CPLAY1MODE”
(C34).
3. Press the [YES] button twice to display “CPLAY1MID”.
4. Press the [MENU/NO] button when “C = AD = )” is
displayed.
5. Turn the [ AMS ] knob to display “FBIAS CHECK”
(C16).
6. Press the [YES] button to display “ / c = T”.
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.
7. Press the [YES] button and display “ / b = T”.
Check that the C1 error is below 100 and ADER is below 2.
8. Press the [YES] button and display “ / a = T”.
Check that the C1 error is below 100 and ADER is below 2
9. Press the [MENU/NO] button, then press the Z button and
take out the disc.
Note: If the C1 error and ADER are above other than the specified
value at points a (step 8. in the above) or b (step 7. in the above),
the focus bias adjustment may not have been carried out prop-
erly. Adjust perform the beginning again.
5-16. AUTO GAIN CONTROL OUTPUT LEVEL
ADJUSTMENT
Be sure to perform this adjustment when the optical pick-up is
replaced.
If the adjustment results becomes “Adjust NG!”, the optical pick-
up may be faulty or the servo system circuits may be abnormal.
5-16-1. CD Auto Gain Control Output Level Adjustment
Procedure:
1. Load the check disc (TDYS-1).
2. Turn the
[ AMS ] knob to display “AG Set (CD)” (C11).
3. When the [YES] button is pressed, the adjustment will be per-
formed automatically.
“Complete!!” will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to “AG Set (CD)” (C11).
4. Press the Z button and take out the check disc (TDYS-1).
5-16-2. MO Auto Gain Control Output Level Adjustment
Procedure:
1. Load the test disc (MDW-74/GA-1).
2. Turn the
[ AMS ] knob to display “AG Set (MO)” (C10).
3. When the [YES] button is pressed, the adjustment will be per-
formed automatically.
“Complete!!” will then be displayed momentarily when the
value is recorded in the non-volatile memory, after which the
display changes to “AG Set (MO)” (C10).
4. Press the Z button and take out the test disc
(MDW-74/GA-1).
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