My Beogram 8000 is up and running but......

23 replies

the platter is turning in the wrong Direction!

I finished it tonight and I must have put a cap reversed or something. I did one at a time but I may have did something wrong. I notice as I turned on the power strip on the table was already on without me pushing the power button on and was going backwards. I will go back and double check everything with schematics. I also hear a slight hum when I turned on the power strip.

All the LED are now on so that is working now.

Has this happened to anyone here?

Any advice or info will be greatly appreciated.

Thanks

One of my Beogram 8002 turntable projects was doing that. There are a number of things you have to go through and check on those turntables (BG 8000 being very similar to the BG 8002).  Those old decks often require more than just a recap. The board connectors often need to have the solder joints reflowed.  Sometimes other components need reflowed solder joints. First though, just double-check that all of the connectors are connected properly.

Before you did the recap, was the turntable non-functional or was it turning okay?

Hi sonavor,

The BG 8000 was not working when I bought it. I received the recap kit from Dillen and started the repair. I will go back and double check the connections.

I removed and resoldered all the connectors on the main PCB. I replaced all the caps even the one inside the with the Microprocessor.

I must have did something wrong. I will look again.

Thanks

On the smaller board with the microprocessor there are some components (i.e. film capacitors) that have some solder points on the trace side and some solder points on the component side of the board. Make sure you examine that part thoroughly.

One more thing....if you post some detailed pictures of your repair, other sets of eyes here on the forum might be able to spot something you are missing.

Check your connector solders with a magnifying glass. You may have a solder bridge.

It happened to me, however cautious I was!

I will check those pcbs again. Also My digital camera is not working properly and it will not focus in close to the PCB that's why I haven't posted pictures. I will try to get some posted soon. Sorry about this.

I did get some bridges while soldering and had to remove them after I view with a magnifying glass. I will recheck again. A few of the cable came out of the connector that goes to the Microprocessor. I reconnected them and had to really push down in the connector to make sure they were secure in the connector. I did make sure the cable were in properly.

Hi Chartz,

I forgot to mention that I haven't installed the new tachodisc I got form Dillen as to just see if the unit would just power up. Would a bad tachodisc cause the platter to spin baclwards? since I heard some hum and from what I have been reading in the archieves about bad tachodisc causing the drive to hum. Could this maybe bethe cause? I didn't want to change out to many things at once but I will change that out and see if that fixes the problem. Also I only saw 00.00 in the display when I plug it in to the ac outlet. The original problem was no power, nothing else worked except for the sensor arm light and the last far right display blinking a Reversed "C" in the lower segment.

I have the service manual but is there anything I should know before I try to replace the tachodisc? The service manual seems straight forward but I have learned from experience there are always some sort of little trick/info that is left out and I dont want to break or mess anything else up more.

I will try to see if I can get that digital camera to focus in so I can show some pics of what I'm working on.

Thanks

last night I was looking at the PCB again and didn't see any solder bridges or broken/cracked traces. What I did find was the display accidently came loose and when I went to put it back I notice there were a lot of really bad soldering on some joint pads. Also there were some not even soldered. I will resolder the bad ones and double to see if the ones that are not soldered are supposed to be.

So starting today I will desolder and resolder all the solder joints in this BG8000. The soldering and solder used to me was not of good quality so the only way to make sure is to redo everything again. I will also resolder all the components again inside with the MPU and reseat the MPU itself. 

After all the resoldering is done and if there are still issues I will start the troubleshooting. Only then I will know all the solder joints are of good quality and making a secure contact, just one thing less to worry about

I will try get some pics up on the forum.

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