SONY HCDMD555 Repair Manual

Error Rate CheckAuto Gain Control Output Level Adjustment
CD Error Rate CheckBe sure to perform this adjustment when the pickup is replaced.
Checking Method :If the adjustment ends in the message OAdjust NG!�, it is suspected
1. Load a check disc (MD) TDYS-1.that the optical pickup is defective or the servo system circuit is
2. Rotate the MULTI JOG knob and display OCPLAdefective.Y MODE�
(30).
3. Press the ENTER/YES button twice and display CD Auto Gain ContrOCPLAYol Output Level Adjustment
MID�.Adjusting Method :
4. OC =AD = � is displayed.1. Insert the check disc (MD) TDYS-1.
5. Check that the C1 error rate is below 20.2. Rotate MULTI JOG and let the display OAG Set (CD)� (26)
6. Press the MENU/NO button, stop playback, press the MD¤appear.
button, and remove the check disc (MD).3. When the ENTER/YES button is pressed, the adjustment is
performed automatically and result of the adjustment is saved
MO Error Rate Checkin the non-volatile memory. After the adjustment result is saved
Checking Method :in the non-volatile memory, OComplete!� appears and then OAG
1. Load a test disc (MDW-74/AU-1).Set (CD)� is displayed indicating that the adjustment is complete.
2. Rotate the MULTI JOG knob and display OCPLA4.Y MODE�Press the MD¤ button and remove the MO disc.
(30).
3. Press the ENTER/YES button twice and display MO Auto Gain ContrOCPLAYol Output Level Adjustment
MID�.Adjusting Method :
4. OC =AD = � is displayed.1. Insert the recording reference disc (MDW-74/AU-1).
5. If the C1 error rate is below 50, check that ADER is 2.2. Rotate MULTI JOG and let the display OAG Set (MO)� (25)
appear.
6. Press the MENU/NO button, stop playback, press the MD¤3. When the ENTER/YES button is pressed, the adjustment is
button, and remove the test disc.
performed automatically and result of the adjustment is saved
Focus Bias Checkin the non-volatile memory. After the adjustment result is saved
in the non-volatile memory, OComplete!� appears and then OAG
Change the focus bias and check the focus tolerance amount.Set (MO)� is displayed indicating that the adjustment is
Checking Method :
1. Load a test disc (MDW-74/AU-1).complete.
4. Press the MD¤ button and remove the MO disc.
2. Rotate the MULTI JOG knob and display OCPLAY MODE�
(30).
3. Press the ENTER/YES button twice and display OCPLAY
MID�.
4. Press the MENU/NO button when OC =AD = � is
displayed.
5. Rotate the MULTI JOG knob and display OFBIAS CHECK�
(05).
6. Press the ENTER/YES button and display O / 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 O / b
=�.
Check that the C1 error is not below 220 and ADER is 2.
8. Press the ENTER/YES button and display O/ 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.
N 50 N