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JVC AV21F3
Service Manual


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

Description of JVC AV21F3 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 29 (click to view)
AV-21F3 AV-21FR3 AV-21FMG3B

PURITY / CONVERGENCE ADJUSTMENT
PURITY ADJUSTMENT
1. Demagnetize CRT with the demagnetizer.
W EDGE DEF LECT ION YOKE
P

2. Loosen the retainer screw of the deflec tion yoke.

3. Remove the wedges.
CR T

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

46

5. Move the deflection yoke backward.

P/C MAGNET S

# P/C MAGNETS 6. Bring the long lug of the purity magnets on the short lug and position them horizontally. (Fig.2) P : PURITY MAGNET 4 : 4 POLES (convergence magnets) 6 : 6 POLES (convergence magnets) 7. Adjust the gap between two lugs so that the GREEN RASTER will come into the c enter of the screen. (Fig.3) Fig.1

8. Move the deflection yoke forward, and fix the pos ition of the deflection yoke so that the whole screen will bec ome green.

9. Ins ert the wedge to the top side of the deflection yoke so that it will not move. 10. Input a cross hatch signal.
Long lug

PURIT Y MAGNET S

11. Verify that the screen is horizontal.
Short lug

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

Bring the long lug over the short lug and position them horizontally.

Fig.2

(F RONT VIEW )

GREEN RASTER

CEN TER

Fig.3

No. 52024

29

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