Sony MZ-R50 service manual Connection, Adjusting Method, Traverse Waveform, RF waveform

5-7. Low Reflection CD Traverse Adjustment

Connection :

Oscilloscope

MAIN board

TP5980 (TE)

AP5430 (VC)

Adjusting Method :

1.Set the servo mode of the test mode (Mode : 000).

2.Press the Ó key, and set the low reflection CD playback adjust- ment mode (Mode : 040) using the volume + and – keys.

3.Load any MO disc available on the market.

4.When the Ókey is pressed, the low reflection CD playback EF balance adjustment mode (Mode : 042) will be set after low re- flection CD focus search ON (Mode : 041).

5.Press the P key to perform automatic adjustment, and check

that the traverse waveform is symmetrical at the top and bottom.

(Traverse Waveform)

A

0V C

B

Specification : A = B, C >= 0.9Vp-p

6.Check that the traverse level at this time is above 0.9Vp-p.

7.Press the p key.

8.Exit the test mode.

5-9. CD RF Level Check

Connection :

Oscilloscope

MAIN board

AP5500 (RF)

AP5430 (VC)

Digital voltmeter

MAIN board

AP5117 (VCC)

AP574 (LDIO)

Adjusting Method :

1.Set the servo mode of the test mode (Mode : 000).

2.Press the Ókey, and set the CD playback adjustment mode (Mode : 050) using the volume + and -keys.

3.Press the =and +keys and move the optical pickup to the center circumference.

4.Load a CD test disc (TDYS-1).

5.When the Ókey is pressed, the CD EF balance adjustment mode (Mode : 052) will be set after CD focus search ON (Mode : 051).

6.When the Ó key is pressed, the ABCD level adjustment mode (Mode : 053) is set.

7.Press the P key to perform automatic adjustment, and check that the RF level is 1.1 ±0.3Vp-p.

(RF waveform)

5-8. CD Traverse Adjustment

Connection :

Oscilloscope

MAIN board

TP5980 (TE)

AP5430 (VC)

Adjusting Method :

1.Set the servo mode of the test mode (Mode : 000).

2.Press the Ókey, and set the CD playback adjustment mode (Mode : 050) using the volume + and – keys.

3.Press the =and +keys and move the optical pickup to the center circumference.

4.Load a CD test disc (TDYS-1).

5.When the Ókey is pressed, the CD playback EF balance adjust- ment mode (Mode : 052) will be set after CD focus search ON (Mode : 051).

6.Press the P key to perform automatic adjustment, and check that the traverse waveform is symmetrical at the top and bottom.

(Traverse Waveform)

A

0V C

B

Specification : A = B, C >= 1.0 Vp-p

7.Check that the traverse level at this time is above 1.0Vp-p.

8.Press the p key.

9.Exit the test mode.

1.1 – 0.3 Vp-p

8.Check that the voltage between AP574 (LDIO) and AP5117 (VCC) and at this time is below 40mV.

9.Press the p key.

10.Exit the test mode.

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