Grundig Satellit 300 - UK Vintage Radio Repair and Restoration Discussion Forum

Uncle Bulgaria · 24th Jul 2020, 9:28 pm

I have been given this by a friend to repair. I've dealt with the egregious problems such as dry joints and broken wires, and it now receives on all bands (though reception here is v. poor so I'll have to give it back to him to test in his house to see if the receiver needs attention).

The tuning meter is not responding, though when I started it was (at least on AM), which leads me to think it's a dry joint somewhere. It reads battery state accurately when depressed, with the battery terminals connected to a PSU, so the movement is OK.

I have a block schematic from ElektroTanya but haven't got a circuit diagram or service manual. Does anyone have such a thing, or top tips for the meter circuit on this model?

ms660 · 24th Jul 2020, 9:43 pm

https://archives.doctsf.com/document...6979&ref=27484

Lawrence.

OldTechFan96 · 24th Jul 2020, 9:47 pm

I found this cache of Grundig service manuals the other day.

Satelite 300 is near the bottom of the page.

Uncle Bulgaria · 25th Jul 2020, 1:27 am

Thanks both! Better than what I managed to come up with. I'll try my best to make sense of the German and have a poke around using the international language of circuits...

Boulevardier · 25th Jul 2020, 5:14 pm

Quote:

Originally Posted by OldTechFan96

I found this cache of Grundig service manuals the other day.

Satelite 300 is near the bottom of the page.

Wow! What a hugely useful collection of Grundig manuals - hundreds and hundreds of models. There are many that I haven't found anywhere else. Thanks for posting OldTechFan.

Does anyone know a way of saving all those pdfs fairly quickly (webpages like this can just vanish overnight)?

Mike

Uncle Bulgaria · 26th Jul 2020, 12:33 am

No, I'm afraid not. Perhaps there's some addon?

I'm now confused further - the tuning meter is now responding, but only when the circuit board corner by the 30V transformer is depressed. I've reflowed all the joints around there and the transformer is reliably outputting 30V.

The display only shows the frequency when the corner is depressed, otherwise it has the --:-- for 'time'. If the radio is tuned to a frequency with the corner depressed, then the corner is released, it remains tuned with the meter at the same position, playing the station. However, there is no frequency displayed. I can't work out what around here apart from a general earthing intermittency could have this effect. There are some through-board soldered connections, so I could try re-soldering them with wires, but the bending of the board is local and nothing within its radius responds.

Uncle Bulgaria · 26th Jul 2020, 1:32 am

And as is so often the case, the act of writing out the issue clarifies it. I found a PCB link between pin C of SW2 and R580, which was the final link in the chain back to the LCD screen, that was intermittent. The printed side was inaccessible, so I soldered a jumper between these two points and the problem has gone. Now to give it back to my friend and see what the reception's like where he is!

24th Jul 2020, 9:28 pm	#1
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Grundig Satellit 300 I have been given this by a friend to repair. I've dealt with the egregious problems such as dry joints and broken wires, and it now receives on all bands (though reception here is v. poor so I'll have to give it back to him to test in his house to see if the receiver needs attention). The tuning meter is not responding, though when I started it was (at least on AM), which leads me to think it's a dry joint somewhere. It reads battery state accurately when depressed, with the battery terminals connected to a PSU, so the movement is OK. I have a block schematic from ElektroTanya but haven't got a circuit diagram or service manual. Does anyone have such a thing, or top tips for the meter circuit on this model?

24th Jul 2020, 9:43 pm	#2
ms660 Dekatron Join Date: Apr 2011 Location: Cornwall, UK. Posts: 13,454	Re: Grundig Satellit 300 service manual? https://archives.doctsf.com/document...6979&ref=27484 Lawrence.

24th Jul 2020, 9:47 pm	#3
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,186	Re: Grundig Satellit 300 service manual? I found this cache of Grundig service manuals the other day. Satelite 300 is near the bottom of the page.

25th Jul 2020, 1:27 am	#4
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Re: Grundig Satellit 300 service manual? Thanks both! Better than what I managed to come up with. I'll try my best to make sense of the German and have a poke around using the international language of circuits...

26th Jul 2020, 12:33 am	#6
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Re: Grundig Satellit 300 No, I'm afraid not. Perhaps there's some addon? I'm now confused further - the tuning meter is now responding, but only when the circuit board corner by the 30V transformer is depressed. I've reflowed all the joints around there and the transformer is reliably outputting 30V. The display only shows the frequency when the corner is depressed, otherwise it has the --:-- for 'time'. If the radio is tuned to a frequency with the corner depressed, then the corner is released, it remains tuned with the meter at the same position, playing the station. However, there is no frequency displayed. I can't work out what around here apart from a general earthing intermittency could have this effect. There are some through-board soldered connections, so I could try re-soldering them with wires, but the bending of the board is local and nothing within its radius responds.

26th Jul 2020, 1:32 am	#7
Uncle Bulgaria Nonode Join Date: May 2016 Location: Cornwall, UK. Posts: 2,339	Re: Grundig Satellit 300 And as is so often the case, the act of writing out the issue clarifies it. I found a PCB link between pin C of SW2 and R580, which was the final link in the chain back to the LCD screen, that was intermittent. The printed side was inaccessible, so I soldered a jumper between these two points and the problem has gone. Now to give it back to my friend and see what the reception's like where he is!