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VCR panasonic is dead, power supply..........
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bt
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PostPosted: Sun Jan 23, 2005 6:45 pm    Post subject: VCR panasonic is dead, power supply.......... Reply with quote

Panasonics VCR is dead & the problem is on power supply, i have changed the faulty STR, but there is nothing. The voltage is present after the STR, up to the primary of the transformer, but no voltage after the primary of the transformer. that is from the secondary & after..... no voltage. Plz help what can be the possible faults ??
bt
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PostPosted: Mon Jan 24, 2005 9:54 am    Post subject: Reply with quote

change boot elkos..i think that is 1 or 2,2 mf 450 volts and 47mf 26volts..
regards
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bt
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PostPosted: Wed Jan 26, 2005 3:43 am    Post subject: what are boot elkos ?? Reply with quote

I have tried to seefor electrolytic capacitors with that value, but there are not any capacitors with that value. and what is boot elkos ?? the VCR is panasonic NV-SD300. help plz. thnaks
bt
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matir
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PostPosted: Thu Jan 27, 2005 9:14 am    Post subject: sd300 Reply with quote

In this board you need schematics of nv-sd 300 Rolling Eyes
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technic
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PostPosted: Sat Jan 29, 2005 9:54 pm    Post subject: Re: VCR panasonic is dead, power supply.......... Reply with quote

bt wrote:
Panasonics VCR is dead & the problem is on power supply, i have changed the faulty STR, but there is nothing. The voltage is present after the STR, up to the primary of the transformer, but no voltage after the primary of the transformer. that is from the secondary & after..... no voltage. Plz help what can be the possible faults ??
bt
resistors 300v to str... xMohm
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bt
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PostPosted: Sun Jan 30, 2005 6:03 pm    Post subject: Reply with quote

the resistors before the str are ok, they are reading their correct resistance value. please help there is voltage reading in the primary of the transformer but there is no voltage in the secondary & the transformer is ok. plz help
bt
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technic
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PostPosted: Sun Jan 30, 2005 7:44 pm    Post subject: Reply with quote

look for all capacitors electrolytic primar no control change
write your email i send you schematic diagram power suply pdf 150kb
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bt
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PostPosted: Mon Jan 31, 2005 3:05 am    Post subject: Reply with quote

thanks for help, i really apprciate it my email address is [email protected]
the power supply have an STR of M6559 & the VCR is nv-sd300.
There is no voltage present in the secondary transformer ( after primary there is no any voltage).
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PostPosted: Thu Feb 03, 2005 8:19 pm    Post subject: Reply with quote

change all electroly.capacitors and zeners!!!sometimes hiden from the transformer.
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bt
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PostPosted: Mon Feb 07, 2005 4:12 pm    Post subject: Reply with quote

all electrolytes & zeners in primary or in secondary side ???
help
bt
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