Sony HCD-C5 service manual Read power traverse adjustment

HCD-C5

Procedure:

1.Connect an oscilloscope to CN105 pin 4 (TE) and CN105 pin 6 (VC) on the BD (MD) board.

2.Load a disc (any available on the market). (Refer to Note 1)

3.Press the M “R” button to move the optical pick-up outside the pit.

4.Press the . “R” or > “R” button to display “EF MO ADJUST” (C07).

5.Press the ENTER/YES “R” button to display “EFB = MO- R”. (Laser power READ power/Focus servo ON/tracking servo OFF/spindle (S) servo ON)

6.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.

(Read power traverse adjustment)

Traverse Waveform

A

VC

B

Specification A = B

7.Press the ENTER/YES “R” button and save the result of

adjustment to the non-volatile memory (“EFB = SAVE”

will be displayed for a moment. Then “EFB = MO-W” will be displayed).

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 MD Z 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

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 MD Z button and take out the check disc.

Adjustment Location: BD (MD) board (see page 44)

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