CDP-CE575 - Sony Audio Service Manual (repair manual). Page 19

19

Procedure:
1.

Set the test disc (PATD-012). Disc chucking operation is
complete, then press the 

[POWER]

 button to turn the power

off.

2.

Connect an oscilloscpe to test point TP (TE1) and TP (VC) on
the BD board.

3.

Connect between test point TP (ADJ) on the MAIN board and
GND by lead wire.

4.

Press the  

[POWER]

 button to turn the power on and enter the

ADJ mode, then playback the number two track automatically.

5.

Press the 

[TIME]

 button.  (The tracking servo and the sledding

servo are turned OFF)

6.

Check the level B of the oscilliscope waveform and the A (DC
voltage) of the center of the Traverse waveform.
Confirm the following :
A/B x 100 = less than ± 22%

Traverse Waveform

7.

Press the 

[TIME]

 button. (The tracking servo and sledding servo

are turned ON)
Confirm the C (DC voltage) is almost equal to the A (DC
voltage) is step 6.

Traverse Waveform

Checking Location: BD board

+
–

BD board

TP (TE1)

TP (VC)

oscilloscope

0V

B

level: 1.15 

±

 0.5 Vp-p

Center of 
the waveform

A (DC 

voltage)

0V

Tracking servo

Sled servo

ON

C (DC 
voltage)

Tracking servo

Sled servo

OFF

TP 

(RFDC)

TP

 (FE1)

TP

 (VC)

IC131

IC150

IC101

TP

 (TE1)

TP 

(RFAC)