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SONY CXJN44
Service Manual


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

Description of SONY CXJN44 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 21 (click to view)
CX-JN44 SECTION 5 ELECTRICAL CHECK
Note: 1. CD Block is basically constructed to operate without adjustment. 2. Use YEDS-18 disc (3-702-101-01) unless otherwise indicated. 3. Use an oscilloscope with more than 10 MΩ impedance. 4. Clean the object lens by an applicator with neutral detergent when the signal level is low than specified value with the following checks. 5. Check the focus bias check when optical block is replaced. FOCUS BIAS CHECK
oscilloscope (DC range) BD board TP012 (RFACO) TP013 (VC)
+ –

Procedure : 1. Connect the oscilloscope to TP012 (RFACO) and TP013 (VC) on the BD board. 2. Insert the disc (YEDS-18). (Part No. : 3-702-101-01) 3. Press the H button. 4. Confirm that the oscilloscope waveform is as shown in the figure below. (eye pattern) A good eye pattern means that the diamond shape (◊) in the center of the waveform can be clearly distinguished. • RF signal reference waveform (eye pattern)
VOLT/DIV: 0.2 V (with the 10: 1 probe in use.) TIME/DIV: 500 ns

1.1

0.2 Vp-p

When observing the eye pattern, set the oscilloscope for AC range and raise vertical sensitivity.

Checking Location: – BD BOARD (Conductor Side) –

TP012 (RFACO)

TP013 (VC)

21

21

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