Grundig Satellit 3000 Receiver - Page 1
Forum section: electronics / rf-microwave

author: Technomaniac
author_rank: Contributor
timestamp: November 06, 2019, 12:11:04 am
content: Hi. At our local Car Swap a few months ago, I purchased a non-functioning Satellit 3000 for AU$10. I found a couple of u/s transistors in a power switching circuit, which I replaced, but the thing still didn't even light up! The power supply is a semi-removable module, attached by several single-strand wires, and whether or not I broke them, I have four wires no longer attached to the PC board. The only manual I could download is printed in German, which is NOT YET a problem, but it contains no physical layouts of the boards, and the silkscreening of the board, on the component side only, leaves a lot of room for improvement. I reckon I have figured out where ONE wire goes, but the others are a bit dodgy. I doubt that there has ever been a decent manual with board layouts but if anyone has one, I need a copy. Otherwise I will probably have to seek out a cheap second set and hope that no wires have yet detached.CheersTechnomaniacAnd I'm looking for a 12v battery cable for it - they have a most unusual connector, which has to hold aside a heavily-spring-loaded cover/switch slide for Mains/battery selection. I can't post a photo as I don't have one to photograph.

author: ozcar
author_rank: Frequent Contributor
timestamp: November 06, 2019, 02:10:43 am
content: I found what must be the same manual that you did. From the schematic there (bummer that it is split up the way that it is) you'd think the power supply and audio amp was all in one. So what exactly is in the “semi-removable module”?I don't know what to make of the multi-lingual rainbow of colours listed just below the power transformer in the schematic.

author: m3vuv
author_rank: Super Contributor
timestamp: November 06, 2019, 03:37:52 am
content: when ive come across this situation,i firstly look to see what tracks the neg side of the electolytics go to,that normaly sorts the ground out,then for example look for the vcc pin on the audio amp from a datasheet and try and see if you power it with a psu see if it back feeds the rest of the radio,thats what i would try.

author: Technomaniac
author_rank: Contributor
timestamp: November 07, 2019, 02:38:05 am
content: Hi. Yes, the power supply and audio amp ARE all in one assembly, and that assembly is what I have halfway out. To release it from the plastic frame which holds the whole set together, (and considering that it probably hadn't been apart since manufacture), there are plastic lengths which slide into plastic slots (makes it sound easy!) but dust in between,not much clearance, and a barbed clip on the side of the mainframe closest to the cabinet front, which I had released, it still didn't want to come out, and I have had no prior experience with the model, so, wiggling and levering to get the power amp/supply module out, may have caused the wires to break. There are many wires running together, not exactly a harness, but all crammed into a plastic channel which is part of the mainframe, right next to the end of the removed module, and the wires only just long enough for the purpose. You can't see where they go after they leave the module, some go between boards that can't be removed as they have the bandswitches and front panel controls mounted to them. If you tried to take it completely apart there'd be lots more wires broken off, as they are single strand wires (possibly knicked partway through when originally stripped of insulation), soldered on the foil sides of boards with no anchorage and no markings.I was looking on line for a better service manual, and I found one that looked like it might have been different. The site said ALL FREE, and I signed up, but then they wanted credit card details, on the other hand promising that I would never be charged, it was just to prove my identity. I thought it a bit fishy, so chickened out.For the record, the faulty transistors I replaced were T608 (s/c base to collector) and T609 (s/c base to collector as well) They are in circuitry which feeds power from 9v battery or the bridge rectifier through numerous sections of the sliding switch that covers the mains socket or external DC input, depending on position of the spring loaded sliding plate. I couldn't manage to remove the sliding plate to get to the switch sections underneath (you can't see the actual switch contacts) so I was in with the ohmmeter, trying to figure out the path between p/s and just about everything else, when I discovered the broken wires.The power module PC board has another board slotted and soldered into it at right angles, the other board has mounted on it a row of front panel potts and switches, including the main power and dial lamp switches. It is this larger board which has the severed wires. I carefully looked for stubs of broken wires, but when I tried to get agreement between the schematic and how it looked in the set, I couldn't verify what I thought. I've had past situations where design modifications haven't shown up in the schematic, this could be another...Thanks for your interest.Technomaniac.

author: ozcar
author_rank: Frequent Contributor
timestamp: November 07, 2019, 04:48:43 am
content: I'm not sure that I was looking at the same manual as you yesterday, because I only noticed today that on elektrotanya.com there are two PDFs, and there is also a zip file containing the schematic in the form of several JPGs. I guess you have seen all of those. Somewhat oddly, the schematics in those three are not just copies of the same original document, so maybe there is other documentation out there somewhere.Edit:I found yet another service manual - maybe you have see this too, but just in case you have not:http://freeservicemanuals.info/en/servicemanuals/viewmanual/Grundig/SATELLIT3000/Filename is just “satellit” but it is a PDF.

author: Technomaniac
author_rank: Contributor
timestamp: November 08, 2019, 12:02:25 am
content: Thanks, Ozcar. I'll check it out. There are several "Satellit" models.