Sony HCD-MD555, Service Manual

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Error Rate Check
CD Error Rate Check
Checking Method :
1. Load a check disc (MD) TDYS-1.
2. Rotate the MULTI JOG knob and display “CPLAY MODE”
(30).
3. Press the ENTER/YES button twice and display “CPLAY
MID”.
4. “C = AD = ” is displayed.
5. Check that the C1 error rate is below 20.
6. Press the MENU/NO button, stop playback, press the MD
§
button, and remove the check disc (MD).
MO Error Rate Check
Checking Method :
1. Load a test disc (MDW-74/AU-1).
2. Rotate the MULTI JOG knob and display “CPLAY MODE”
(30).
3. Press the ENTER/YES button twice and display “CPLAY
MID”.
4. “C = AD = ” is displayed.
5. If the C1 error rate is below 50, check that ADER is 2.
6. Press the MENU/NO button, stop playback, press the MD
§
button, and remove the test disc.
Focus Bias Check
Change the focus bias and check the focus tolerance amount.
Checking Method :
1. Load a test disc (MDW-74/AU-1).
2. Rotate the MULTI JOG knob and display “CPLAY MODE”
(30).
3. Press the ENTER/YES button twice and display “CPLAY
MID”.
4. Press the MENU/NO button when “C = AD = ” is
displayed.
5. Rotate the MULTI JOG knob and display “FBIAS CHECK”
(05).
6. Press the ENTER/YES button and display “ / c
= ”.
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 50 and ADER is 2.
7. Press the ENTER/YES button and display “ / b
= ”.
Check that the C1 error is not below 220 and ADER is 2.
8. Press the ENTER/YES button and display “ / a
= ”.
Check that the C1 error is below 220 and ADER is 2.
9. Press the MENU/NO button, next press the MD
§
button,
and remove the continuously recorded disc.
Note 1 : If the C1 error and ADER are above 00 at points a (step
8.) or b (step 7.), the focus bias adjustment may not have
been carried out properly. Adjust perform the beginning
again.
Auto Gain Control Output Level Adjustment
Be sure to perform this adjustment when the pickup is replaced.
If the adjustment ends in the message “Adjust NG!”, it is suspected
that the optical pickup is defective or the servo system circuit is
defective.
CD Auto Gain Control Output Level Adjustment
Adjusting Method :
1. Insert the check disc (MD) TDYS-1.
2. Rotate MULTI JOG and let the display “AG Set (CD)” (26)
appear.
3. When the ENTER/YES button is pressed, the adjustment is
performed automatically and result of the adjustment is saved
in the non-volatile memory. After the adjustment result is saved
in the non-volatile memory, “Complete!” appears and then “AG
Set (CD)” is displayed indicating that the adjustment is complete.
4. Press the MD
§
button and remove the MO disc.
MO Auto Gain Control Output Level Adjustment
Adjusting Method :
1. Insert the recording reference disc (MDW-74/AU-1).
2. Rotate MULTI JOG and let the display “AG Set (MO)” (25)
appear.
3. When the ENTER/YES button is pressed, the adjustment is
performed automatically and result of the adjustment is saved
in the non-volatile memory. After the adjustment result is saved
in the non-volatile memory, “Complete!” appears and then “AG
Set (MO)” is displayed indicating that the adjustment is
complete.
4. Press the MD
§
button and remove the MO disc.