CDP-XE520 - Sony Audio Service Manual (repair manual). Page 11

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Procedure :
1. Connect the test point JW613 (ADJ) on MAIN board to the

ground with a lead wire on main board.

2. Connect oscilloscpe to test point TP (TE) on BD board.
3. Turn the Power switch on to set the ADJ mode.
4. Put disc (YEDS-18) in to play the number five track.
5. Press the 

4 button. (The tracking servo and the sledding servo

are turned OFF.)

6. 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 ± 22%

Traverse waveform

oscilloscope

BD board

TP (TE)
TP (VC)

[ BD BOARD ] – Side A –

[ MAIN BOARD ] – Component Side –

0V

level :  1.3 

±

 0.6 Vp-p

A (DC voltage)

Center of the waveform

B

7. Press the 

9 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

0V

C (DC 
voltage)

Tracking servo

Sledding servo 

OFF

Tracking servo
Sledding servo
        ON

8. Disconnect the lead wire of JW613 (ADJ) connected in step 1.

CN102

IC101

TP(FEI)

TP(VC)

TP(IOP)

TP(RF)

TP(TE)

TP(FE)

TP

(R151)

0V

level : 1.3       Vp-p

A (DC voltage)

Center of the waveform

B

symmetry

+ 0.7
– 0.6

     1 track jump waveform

JW613 (ADJ)

CN621

JW617 (AFADJ)