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JVC AV21PM
Service Manual


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

Description of JVC AV21PM 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.

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Text excerpt from page 25 (click to view)
AV-21PM

PURITY, CONVERGENCE ADJUSTMENT PURITY ADJUSTMENT
1. Demagnetize CRT with the demagnetizer.
WEDGE DEFLECTION YOKE

2. Loosen the retainer screw of the deflection yoke.
P

3. Remove the wedges. (Fig. 1.)

CRT
46

4. Input a green raster signal from the signal generator, and turn the screen to green raster.

P/C MAGNETS

5. Move the deflection yoke backward.

⢠P/C MAGNETS P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets)

6. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig. 2)

7. Adjust the gap between two lugs so that the green raster will come into the center of the screen. (Fig. 3)

Fig. 1

8. Move the deflection yoke forward, and fix the position of the deflection yoke so that the whole screen will become green.
Long lug

PURITY MAGNETS

9. Insert the wedge to the top side of the deflection yoke so that it will not move.

10. Input a cross-hatch signal.

Short lug Bring the long lug over the short lug

11. Verify that the screen is horizontal.

and position them horizontally.

Fig. 2 12. Input red and blue raster signals, and make sure that purity is properly adjusted.

(FRONT VIEW) GREEN RASTER

CENTER

Fig. 3

No. 56055

25

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