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Old 9th Oct 2015, 9:34 pm   #15
ben
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Join Date: Aug 2006
Location: Madrid, Spain / Wirral, UK
Posts: 6,214
Default Re: Help with National NV-780EM VHS

This is a relatively early front loader from the mid 80s. D deck.
If it's the one I'm thinking of, it has a transformer PSU.

On powerup, the mech should 'shuffle' the reel idler. If this doesn't happen, then the drive belts should be replaced and the mode switch cleaned. That shoud solve this fault.
There was also a resistor of very low ohms/safety type, that used to go high, cannot recall if it was in the PSU or on the main PCB where the voltage lines come in. Will try and find some info.
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