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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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panasonic nv-d80 vcr - no tuner
....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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panasonic nv-d80 vcr - no tuner
b wrote: ...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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