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NATIONAL PANASONIC SA-6800X NO LIGHTS

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nicolas25

Active Member
good day everyone. a friend of mine gave me an old amp.a vintage receiver national panasonic sa-6800x. all is working fine except no lights at all.or the only light which work is the power indicator.i test all the lamps using a power supply and all are ok.i checked the cables for the connection and all ok, i checked also the two fuses on the near back and all ok.i checked the voltage for the line which supply power to the lamps and i got only 0.4 volts.suppose to be its 6v+ because the lamps are 6.3v 0.25A. any help please!!! thanks
 
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The 6.3 volt source should be near the power transformer on the power supply board. I'm thinking you may have missed a fuse or a fuse resistor. If not you'll have to physically trace the wiring back to the failure. A schematic would be a great help. Nice looking amp. Looks like a high quality quad receiver. 42 watts X 4.
 
thank you very much regore.i checked again the whole unit for possible hidden fuses and found nothing.only the two on the near back.i checked again the two fuses using a digital multimeter and both of them have continuity.i removed them and replace them both and voila, the reading is 6.7 volts.i dont know why the old ones produce only 0.4 v. BIG THANKS FOR THE HELP, NOW ALL LIGHTS ARE WORKING FINE
 
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