E-F Balance (1 Track Jump) Check (Without remote commander)

oscilloscope

BD (CD) board

 

TP (TEO)

+

TP (VC)

Procedure :

1.Connect oscilloscpe to test point TP (TEO) on BD board.

2.Turn Power switch on.

3.Put disc (YEDS-18) in to play the number five track.

4.Press the “ P(Pause)” button. (Becomes the 1 track jump mode)

5.Confirm that the oscilloscope waveform is symmetrical on the top and bottom in relation to 0Vdc, and check this level.

1 track jump waveform

A

0V

B

LEVEL : 300 ± 100 mVp-p

A – B

Specified level: • 2 (A + B) x 100 = less than ± 7%

• A + B = 300 ± 100 mVp-p

Focus/Tracking Gain Adjustment (RV102, RV103)

This gain has a margin, so even if it is slightly off. There is no problem.

Therfore, do not perform this adjustment.

Please note that it should be fixed to mechanical center position when you moved and do not know original position.

Adjustment Location:

[BD (CD) BOARD] — Component Side —

RF

 

 

FOK

 

(Focus Bias Adjust)

 

RV101

 

IC102

 

TEI

 

IC101

 

RV103

 

 

TEO

FEO

 

FEI

 

VC

RV102

 

 

 

IC104

PCK

GND

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Image 15
Sony hcd-sd1 Balance 1 Track Jump Check Without remote commander, Focus/Tracking Gain Adjustment RV102, RV103