panasonic nv-d80 vcr - no tuner
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panasonic nv-d80 vcr - no tuner

 
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b
Guest
Posted: Thu Dec 08, 2005 9:00 am    Post subject: panasonic nv-d80 vcr - no tuner Reply with quote
....just a black screen - no audio or image. channel numbers change
thats all. Playback is Ok, it seems just the e-e signal has got lost.
measuring the tuner pins I have the following:

bu - 15v (=uhf band selected)
bt - 15v
afc - 6v
bm -15v

.....should there not be a 33v somewhere there?
the unit was initially dead when I got it. Have replaced all the caps
in the psu to bring it back to life....What should the voltages be on
the psu output connector? or better still, anyone have a schematic?
thanks in advance for any suggestions.
Ben

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b
Guest
Posted: Thu Dec 08, 2005 5:35 pm    Post subject: Re: panasonic nv-d80 vcr - no tuner Reply with quote
b wrote:
Quote:
...just a black screen - no audio or image. channel numbers change
thats all. Playback is Ok, it seems just the e-e signal has got lost.
measuring the tuner pins I have the following:

bu - 15v (=uhf band selected)
bt - 15v
afc - 6v
bm -15v

I forgot to mention, the unit 'goes thru the motions' of searching for
channels. As it does so, the voltage on the the BT pin does in fact
vary from about 0-33 volts as I suspect it should....At this point I am
looking at changing the tuner.
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