General information
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Job Number |
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0210-65 |
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Equipment type |
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VCR |
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Maker + Model # |
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Roadstar VCR-750 |
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Made in |
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Date in |
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16-Oct |
2002 |
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Date of repair |
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26-Oct |
2002 |
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Date out |
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2002 |
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Comments |
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Reported that video has no picture and does not
record |
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Symptoms observed
BAD |
1 |
Bands of snow which rolls vertcally in picture. |
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2 |
On pause one or two bands of snow |
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3 |
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GOOD |
1 |
Good mechanical and electronical functions |
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2 |
Good sound |
Repair notes
Full repair description and observations |
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1 |
At first, the head was the first suspect. A
good cleaning improved the picture but
the vertical snowy bars were not eliminated |
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2 |
Playing with the right rabbit setting
improved and finally eliminated the bars from the picture giving a detailed
unsnowy picture. This needed patience and a good content of trial and error
skill. |
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3 |
However when the tape reached the end, the
snow bars where visible again. Further setting adjustment did eliminate the
snow bars but then they re-appeared at the beginning position of the tape.
Ultimately the control/audio - head screws had to be adjusted as well so that
finally a good picture is obtained throughout the whole tape. |
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4 |
The setting involved opening back the VCR
for about 5 times because at a certain point in the tape, the snow bars would
appear again, but finally the ideal settings of the rabbits (left and right)
and the control head was established giving good results |
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5 |
Additinally, the REW did
not rewound the tape till the end. This was due to a
loosey rubber belt which when repalced, it solved the problem out. The belts
came in a set of 3 c (1: capstan belt (wide thickness) 2: main pinch roller
belt, 3: Eject Belt). |
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Repair summary |
MIS-ALIGNMENT
OF THE TAPE GUIDES AND AUDIO/CONTROL HEAD |
Precautions, fouls and advises |
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1 |
The adjustment of the
rabbits is very akward. The rollers are quite tight and damage to the head is
easy achieved if the tools slip from the mms away head and break it. Adequate
rabbit turning tool is adviced as the screwdriver serious corroded and
tampared the grooves that it was not possible to rotate it with the
screwdriver. Actually it was then rotated by means of pliers, |
Other measurements and technical comments
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1 |
n/a |
