Sony D-E330 - Portable Cd Player, Service Manual

6

D-E330/E331

SECTION 4

ELECTRICAL ADJUSTMENTS

The CD section adjustments are done automatically in this set.

Precautions for Check

1. Perform check in the order given.
2. Use YEDS-18 disc (Part No.: 3-702-101-01) unless otherwise

indicated.

3. Power supply voltage requirement : DC4.5 V in DC IN jack.

             (J401)

VOLUME button : Minimum
HOLD switch : OFF

Focus bias Check

Condition:
• Hold the set in horizontal state.

Connection:

Procedure:
1. Connect the oscilloscope to the test points TJ503(RFI) and TJ610

(VBIAS) on the MAIN board.

2. Set a disc. (YEDS-18)
3. Press the  

>B

  button.

4. Check the oscilloscope waveform is as shown below.

A good eye pattern means that the diamond shape (

◊

) in the cen-

ter of the waveform can be clearly distinguished.

RF Signal reference Waveform (Eye Pattern)

To watch the eye pattern, set the oscilloscope to AC range and
increase the vertical sensitivity of the oscilloscope for easy
watch-ing.

5. Stop revolving of the disc motor by pressing the 

 x 

 button.

[MAIN BOARD] (SIDE B)

S801

(OPEN/CLOS

C301

C619

C802

IC603

TP814

C106

R620

TAP806

C634

TJ502

R631

TJ608

TP817

TP609

TP616

R824

0

TP503

TJ303

C306

R209

C10

TJ603

C203

TP507

TJ610

R205

TP603

TJ604

D801

TAP803

TJ405

TJ601

TJ602

TJ607

TAP805

TJ501

Q601

TJ503

TAP601

TP621

IC302

R109

C206

C610

R605

R107

D805

R617

R613

R614

R615

L601

HPLOUT

AVDD

AGND

LD

RFI

AVDD

LASER

MON1

MON2

CLK4M

FOK

RF1

SCOR

XBUSY

C2POEN

PD

VBIAS

OPSTB

RFGO

.4V

TJ610 (VBIAS)

TJ503(RFI)

oscilloscope

(AC range)

RF level
0.45 to 0.65 Vp-p

VOLT/DIV : 100 mV (With the 10 : 1 probe in use)
TIME/DIV : 500n

s