Sony HCD-PX333 specifications Focus Bias Adjustment, Enter, Yes R

8. Press the . “R” or >“R” button so that the waveform of

the oscilloscope becomes the specified value.
(When the . “R” or > “R” button is pressed, the	of

“EFB= ” changes and the waveform changes) In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

(Write power traverse adjustment)

Traverse Waveform

A

VC

B

Specification A = B

9.Press the ENTER/YES “R” button, and save the adjustment results in the non-volatile memory. (“EFB = SAVE” will be displayed for a moment)

10.“EFB = MO-P” will be displayed.

The optical pick-up moves to the pit area automatically and servo is imposed.

11.Press the . “R” or > “R” button until the waveform of the oscilloscope moves closer to the specified value.

In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

Traverse Waveform

A

VC

B

Specification A = B

12.Press the ENTER/YES “R” button, and save the adjustment results in the non-volatile memory. (“EFB = SAVE” will be displayed for a moment)

Next “EF MO ADJUST” (C07) is displayed. The disc stops rotating automatically.

13.Press the Z (MD) button and take out the disc.

14.Load the check disc (TDYS-1).

15.Press the . “R” or > “R” button to display “EF CD ADJUST” (C08).

16.Press the ENTER/YES “R” button to display “EFB = CD”. Servo is imposed automatically.

17.Press the . “R” or >“R” button so that the waveform of the oscilloscope moves closer to the specified value.

In this adjustment, waveform varies at intervals of approx. 2%. Adjust the waveform so that the specified value is satisfied as much as possible.

Traverse Waveform

A

VC

B

Specification A = B

HCD-PX333

18.Press the ENTER/YES “R” button, display “EFB = SAVE” for a moment and save the adjustment results in the non-volatile memory.

Next “EF CD ADJUST” (C08) will be displayed.

19.Press the Z (MD) button and take out the check disc.

Adjustment Location: BD (MD) board (see page 47)

13.FOCUS BIAS ADJUSTMENT

Procedure:

1.Load the continuously-recorded disc. (Refer to “5. USING THE CONTINUOUSLY RECORDED DISC” (See page 40))

2.Press the . “R” or > “R” button to display “CPLAY2 MODE” (C36).

3.Press the ENTER/YES “R” button to display “CPLAY2MID”.

4.Press the MENU/NO “R” button when “C = AD = )” is displayed.

5.Press the . “R” or > “R” button to display “FBIAS ADJUST” (C09).

6.Press the ENTER/YES “R” button to display “ / a = ”. The first four digits indicate the C1 error rate, the two digits after “/ ” indicate ADER, and the 2 digits after “a =” indicate the focus bias value.

7.Press the >“R” button and find the focus bias value at which the C1 error rate becomes about 200 (refer to Note 2).

8.Press the ENTER/YES “R” button to display “ / b = ”.

9.Press the .“R” button and find the focus bias value at which the C1 error rate becomes about 200.

10.Press the ENTER/YES “R” button to display “ / c = ”.

11.Check that the C1 error rate is below 20 and ADER is 00. Then

	press the	ENTER/YES “R”		button.
12.	If the “(	)” in “ - -		( )” is above 20, press the
						ENTER/
		button.
	YES “R”
	If below 20, press the				button and repeat the
			MENU/NO “R”
	adjustment from step 2.
13.	Press thet	Z (MD) button and take out the disc.

Note 1: The relation between the C1 error and focus bias is as shown in the following figure. Find points A and B in the following figure using the above adjustment. The focal point position C is auto- matically calculated from points A and B.

Note 2: As the C1 error rate changes, perform the adjustment using the average vale.

C1 error

about 200

Focus bias value

BCA

45