Help: National Panasonic SG 1070L stopped playing audio. - UK Vintage Radio Repair and Restoration Discussion Forum

setareh · 21st Jul 2017, 8:35 pm

Hello all.
This is my first time here and first time owning a vintage record player/cassette player. My knowledge of this topic is very limited, so disclaimer and apologies.

Was very happy with this deck, the sound and all components worked nicely when I hooked it up to my logitech speakers (through the phones input).
Today I got some old JVC speakers that worked fine. Bought the pin plug to insert the speaker wire into the rear inputs for the sound. It worked briefly and then something popped loudly and now no sound anymore

Not even when I plug in the first pair of speakers.

When I turn on the phono I can hear the record playing softly, as in the grooves make sound. Nothing else works anymore.

Please, any input?

'LIVEWIRE?' · 21st Jul 2017, 11:44 pm

Are you sure you wired the pin (?DIN) speaker plugs correctly, in particular making certain, preferably by sleeving one of the two wires, that no short circuit would ensue? It's possible that internal fuse(s) have blown, which, if you're lucky, wil be all that's wrong. If you're not so lucky, the output stage, which may be an IC, could well have failed.

Diabolical Artificer · 22nd Jul 2017, 6:40 am

Unplug it, take the back off and look for burnt or blown component's. While your at it take some good pictures and post here. Does the front light up/cassette work?

Being a music centre you've probably blown a fuse that protects the amplifier, hopefully.

Andy.

21st Jul 2017, 8:35 pm	#1
setareh Retired Dormant Member Join Date: Jul 2017 Location: Rotterdam, Netherlands Posts: 1	Help: National Panasonic SG 1070L stopped playing audio. Hello all. This is my first time here and first time owning a vintage record player/cassette player. My knowledge of this topic is very limited, so disclaimer and apologies. Was very happy with this deck, the sound and all components worked nicely when I hooked it up to my logitech speakers (through the phones input). Today I got some old JVC speakers that worked fine. Bought the pin plug to insert the speaker wire into the rear inputs for the sound. It worked briefly and then something popped loudly and now no sound anymore Not even when I plug in the first pair of speakers. When I turn on the phono I can hear the record playing softly, as in the grooves make sound. Nothing else works anymore. Please, any input?

21st Jul 2017, 11:44 pm	#2
'LIVEWIRE?' Rest in Peace Join Date: Mar 2006 Location: N.W. Oxfordshire(Chipping Norton) Posts: 7,306	Re: Help: National Panasonic SG 1070L stopped playing audio. Are you sure you wired the pin (?DIN) speaker plugs correctly, in particular making certain, preferably by sleeving one of the two wires, that no short circuit would ensue? It's possible that internal fuse(s) have blown, which, if you're lucky, wil be all that's wrong. If you're not so lucky, the output stage, which may be an IC, could well have failed.

22nd Jul 2017, 6:40 am	#3
Diabolical Artificer Dekatron Join Date: Jul 2009 Location: Sleaford, Lincs. UK. Posts: 7,669	Re: Help: National Panasonic SG 1070L stopped playing audio. Unplug it, take the back off and look for burnt or blown component's. While your at it take some good pictures and post here. Does the front light up/cassette work? Being a music centre you've probably blown a fuse that protects the amplifier, hopefully. Andy. __________________ Curiosity hasn't killed this cat...so far.