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Service Manual

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

Description of SONY KV25X5B 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 19 (click to view)


Screen corner convergence.
If you are unable to adjust the corner convergence properly, this can be corrected by the use of permalloy assemblies.

3-3. Screen [G2], White balance
G2 Setting
1. 2. 3. 4. Input a dot signal from the pattern generator. Set the Picture, Brightness and Colour to minimum. Apply 170Vdc from an external power supply to the R, G and B cathodes of the CRT. Whilst watching the picture, adjust the G2 control [RV701 SCREEN] located on the C Board to the point just before the flyback return lines disappear.

a a-d: screen-corner convergence defect c



White balance adjustment
1. 2. 3. 4. 5. Input a ‘PAL’ all-white signal from the pattern generator. Enter into the Service Mode. Enter into the ‘Picture’ service menu. Select the ‘Green drive’ and adjust so that the White Balance becomes optimum. Select the ‘Blue drive’ and adjust so that the White Balance becomes optimum. Set the Picture to MIN. Set the ‘R-cut-off’ to 07. Adjust the ‘G-cut-off’, and the ‘B-cut-off’ so that the White Balance becomes optimum. Press the button to return to TV operation.

Fit the permalloy assembly to the rear of the CRT to correct the area at fault.

6. 7. 8. 10.



R - Drive G - Drive Permalloy
c d

Adj Adj Adj Adj Adj Adj 02 01 01 Adj Adj Adj

B - Drive R - cut - off G - cut - off B - cut - off ID - start ID - stop ID - level Bellfo Sub Colour Sub Brightness

3-4. FOCUS
1. 2. 3.

Input a Phillips colour pattern Set the picture settings to normal. Adjust the focus control located on the Flyback transformer to bring the centre of the screen into focus. Note :Bring only the centre area of the screen into focus, switch to an all-white pattern and confirm that the magenta ring is hardly noticed. To obtain optimum focus balance the focus setting between optimum screen centre focus and a reduced magenta ring level.


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Circuit Diagrams

Set of circuit diagrams. The diagrams will be provided as PDF file. The file will be delivered after…
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