Technicolor - Thomson CDP-CX57 RF PLL Free-run Frequency Check, About RV601 on the Main board

When a general remote commander is not used:

1.Solder lead wires to TP (DVDD) and TP (TOFF) on the BD board severally.

2.Connect the oscilloscope to TP (TE) of the BD board.

3.Press the I/u button and turn ON the power supply.

4.Open the front cover, and press the [PLUSÊONE] button.

5.Set the disc (YEDS-18) into the “PLUS ONE” slit.

6.Close the front cover, and chuck the disc.

7.Playback the fifth track of the disc.

8.Short-circuit the lead wire connected at step 1. (The tracking servo is turned OFF)

9.Check the level B of the oscilliscope's waveform and the A (DC voltage) of the center of the Traverse waveform. Confirm the following :

A/B x 100 = less than ± 10%

RF PLL Free-run Frequency Check

Procedure :

1. Connect the frequency counter to TP (PCK) of the BD board.

frequency counter

BD board

TP (PCK)

2.	Press the	I/u	button and turn ON the power supply.
3.	Open the front cover, and press the [PLUSÊONE] button.
4.	Set the disc (YEDS-18) into the “PLUS ONE” slit.
5.	Close the front cover, and chuck the disc.
6.	Playback th e fifth track of the disc.
7.	Confirm that reading on frequency counter is 4.3218 MHz ±

Traverse waveform

Center of the waveform

30 kHz.

B

About RV601 on the MAIN board

RV601 of the MAIN board requires no adjustments. Please note that it should be dixed to mechanical center position when you

0 V

A (DC voltage)

moved and do not know origin position.

level: 1.3 ± 0.5 Vp-p

10.Disconnect the lead wire short-circuited at step 8. (The track- ing servo is turned ON.) Confirm the C (DC voltage) is almost equal to the A (DC voltage) is step 8.

Traverse waveform

0 V

Tracking servo	Tracking servo
OFF	ON

C(DC

voltage)

11.Turn OFF the power, and remove the lead wire connected at step 1.

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