VCR Repair Secrets 1. Articles of the Free Technical Library

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VCR Repair Secrets 1

Secrets of repairing household radio-electronic equipment

PHILIPS VP-58/55

Fault: Automatic switching from stereo to mono.

Remedy: Adjust by manual tracking in one direction or another, if the device stops switching, then the synchronization head may not be accurately adjusted. Change the position (height) of the tape guides located on the left and right of the drum with video heads.

SONY SLV-X711

Fault: When the tape recorder is operating, the cassette eject button is pressed and the tape recorder tries to perform the operation, but, without completing it, it freezes and all buttons are blocked. After turning the power off/on, the cassette ejects.

Remedy: Possibly contamination of the command device. It is located under the tape drive mechanism. It should be removed, washed with alcohol, lubricated and assembled. Or the loader/unloader is defective. The bushing on the shaft of the loading / unloading motor bursts, it starts to slip and the machine enters the blocking mode with an error indication on the F03 display. It is also possible that there is sparking of the brush contacts on the load motor manifold, which leads to the processor freezing, then it is necessary to shunt the outputs of the load motor with a capacity of 0.1 microfarads.

AIWA HV-CX7KE

Fault: Arbitrarily goes into standby mode, the cassette is not ejected.

Remedy: Clean and lubricate the program gear.

TOSHIBA V-206R

Fault: On the TV screen, wide white stripes of 15-20% of the image size fall vertically, lines are knocked out, the sound floats.

Remedy: The high-voltage capacitor at the output of the diode bridge at the network input of the switching power supply is damaged.

AKAI VS-P120EM

Fault: Autotracking does not stop during playback (it constantly works, passing the optimum), therefore it reproduces with varying success

Remedy: Check the signal flow from the synchronizing head. Possibly poor contact, head contamination, break in the loop, dried electrolytes, are there any mud rims on the drive motor shaft, etc. If the bushings on the drive motor are broken, then the tape can “walk” up and down the sync head or even pass above it .

LG W162W

Fault: When loading a cassette, periodic loading and unloading occurs. When removing the top case cover, the video player works normally

Remedy: The central infrared sensor has failed.

SAMSUNG TVP-5070W/BWX

Malfunction: At regular intervals (10 seconds), the tape stops in the tape recorder in all modes, both during playback, recording, rewinding.

Remedy: Check if the pause mode turns off. If not, then most likely the problem is with the reel sensor (sensors for controlling the movement of the cassette). It is necessary to check its power circuits, whether it is clean (optocoupler), clean the reflective sectors on the cassette. The sensor may need to be replaced.

KANSAI KN5002.

Problem: All functions work except tape rewind. When you turn on the rewind 2-3 sec. engine running is heard, then it turns off

Remedy: Clean command device.

PANASONIC NV-SD205

Fault: Video and sound playback is normal, but as soon as the device is put into standby mode and turned on again, noise appears on the image at the top of the screen or at the bottom, or there may be no image at all, while the sound is normal.

Remedy: Replace the Hall sensor in the BVG.

SONY SLV-X311

Malfunction: After some time after the start of the run, the device stops, after that it does not respond to any command. After a complete shutdown (everything is restored for a while), and then everything repeats from the beginning. Cleaning the programmer did nothing.

Remedy: Check the power supply of the device as a whole. It is possible that the capacitance has dried up in the secondary circuits, in the rectifier, especially 5 V), or in the rectifier of the PSU primary circuit. The protection in the power supply may work. High-resistance resistors, chokes, capacitors should be checked. Check power to control circuits. Perhaps cracks in the conductors on the board at the attachment points of the broach.

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