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SONY DEJ855
Service Manual


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  • Contains Circuit Diagrams
  • Download
  • PDF Format
  • Complete manual
  • Language: English
Price: $4.99

Description of SONY DEJ855 Service Manual

Complete service manual in digital format (PDF File). Service manuals usually contains circuit diagrams, printed circuit boards, repair tips, wiring diagrams, block diagrams and parts list. Service Manual ( sometimes called Repair Manual ) is used mainly by technicians.

If You just want to know how to use Your tv, video, mp3 player etc. You should look for Owner's Manual. After placing order we'll send You download instructions on Your email address.

The manual is available in languages: English

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Text excerpt from page 9 (click to view)
D-EJ855 SECTION 4 ELECTRICAL CHECK
The CD section adjustments are done automatically in this set. In case of operation check, confirm that focus bias. 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 : Minimum AVLS switch : NORM HOLD switch : OFF G�PROTECTION switch : 1
R604 C606 K A R305 + C404 C449 C301 VDR303 FB101 55

Focus bias Check Condition: � Hold the set in horizontal state. Connection:
oscilloscope (AC range) MAIN board TP601 (RF) TP418 (GND) 2k�
+ �

Connecting and Checking Location: � MAIN Board (Component Side) �

Procedure: 1. Connect the oscilloscope to the test points TP601 (RF) and TP418 (GND) on the MAIN board. 2. Set a disc. (YEDS-18) 3. Press the > N button. 4. Check the oscilloscope waveform is as shown below. A good eye pattern means that the diamond shape (�) in the center of the waveform can be clearly distinguished.

VDR101 C102

RF Signal reference Waveform (Eye Pattern)
TP418 (GND)
J301 LINE OUT (OPTICAL)

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

TP601 (RF)

RF level 0.4 to 0.6 Vp-p
D403
R489

1

R410

VDR304

OPTICAL PICK-UP BLOCK DAX-25E

CN503

VDR301

FB201 VDR201

To watch the eye pattern, set the oscilloscope to AC range and increase the vertical sensitivity of the oscilloscope for easy watching.
R303 R304

C605

12

13

C202

C448

R102

R602 R601 C601 R603 C603

C604

IC404

R469

15

1

24

FB301

5. Stop revolving of the disc motor by pressing the x button.

C452 C453 C454

R101

R202 R201

9

9

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