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Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this tuner.
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I have this hi-fi system for a long time and I need to repair some things. Founding this manual will be very helpfull :)
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It is pretty good. The schematics were covered all components, the manual also provide the parts list . It's useful for the trouble shooting.
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Very fast service, best quality of the service manual and the schematics
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This service manual of the old video cassette recorder VT-LC50EM is very good readable even the tiniest numbers (i.e. IC-pins). The circuits are very clear. Many details of the schematic are very good described but in GERMAN language. Many schematic details - but complete at all. Common background information of several details are enclosed and physical knowledge of the TFT liquid crystal display for example. The manual lacks PCB drawings. If you understand german I would recommend this manual for you.
AV-21AT
STATIC CONVERGENCE ADJUSTMENT
1. Input a cross-hatch signal.
2. Using 4-pole convergence magnets, overlap the red and blue lines in the center of the screen (Fig. 1) to turn them to magenta (red/blue).
(FRONT VIEW)
3. Using 6-pole convergence magnets, overlap the magenta (red/ blue) and green lines in the center of the screen to turn them to white.
4. Repeat 2 and 3 above, and make best convergence.
Fig. 1
DYNAMIC CONVERGENCE ADJUSTMENT
1. Move the deflection yoke up and down and overlap the lines in the center. (Fig. 2)
(FRONT VIEW) RED GREEN BLUE
BLUE
RED GREEN BLUE
2. Move the deflection yoke left to right and overlap the lines in the periphery. (Fig. 3)
GREEN RED
3. Repeat 1 and 2 above, and make best convergence.
BLUE GREEN RED
Fig. 2
q After adjustment, fix the wedge at the original position. Fasten the retainer screw of the deflection yoke. Fix the PC magnets with glue.
(FRONT VIEW) GREEN RED BLUE GREEN BLUE RED RED GREEN BLUE
BLUE GREEN RED
Fig. 3
No. 56013
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