Panasonic NV series VHS - M type video recorder wear fault maintenance methods of systems -Service Manual Download|Circuit Download|Download Drawings|schematic download|route map download|free download user manual

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Panasonic NV series VHS - M type video recorder wear fault maintenance methods of systems

Time：2014-05-31 17:08:56 Source：Network Author：Unknown Clicks：1765

Second, the main components of the adjustment method

Wear belt system is a VCR for rules that can make the track important guarantee, is also the important guarantee of good image and sound quality. Therefore, when he wears some parts in the system failure, replace or system was disorderly, must according to certain procedures accurately with adjusting. When adjustment, need to have the following special tools and testing instruments.

1.20 MHz double trace oscilloscope, can monitor video envelope signals of the flatness and the output of audio signal amplitude.

2. Guide pin height adjusting plate, used to regulate the relative to the height of the video head wear belt system.

3 X position adjustment jig for A/C head height, orientation, obliquity, the adjustment of the horizontal position.

4. Zhang Ligui, the size of the measuring tape tension.

5. Torque gauge, check and adjust the torque, supply reel.

6. A standard correction tape (PAL), used for precision adjustment electrical properties.

If have more adjustment tools and instruments, readjust wear running state with the system will be very convenient, but also more accurate. Do not have these special tools, but many amateurs here, focus on does not have the special tools and instruments (amateur) under the condition of adjusting method.

(a) preparation before the adjustment.

Prepare a color television or the color monitor; Made a special screwdriver adjustment guide pin (to find a common screwdriver blade width is 5 mm, use of files in the middle a width of 2.5 mm incision) : in addition to prepare a few corresponding to machine various Allen wrench nut.

(2) tape into or out of the side rotating guide pin (P2, P3) height adjustment.

1. Open video power switch, loaded with content of VHS videotape, then make the video finished loading action. The charging after the replay button (PLAY), after being loaded immediately without electricity. Form the state as shown in figure 2.

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