Question About Beogram 8002 Recapping

[marcham]

Hey, all. Replaced TR17, but nothing changed.

To confirm the current situation, the display shows four dots and pressing ‘Start’ displays ’33,’ but nothing starts up.

Also, to double check, should the state of each keyboard button be high by default at the CPU, then go low when pressed? That’s the current state at the moment.

Included some readings from the reset section below. It remains high at CPU pin 39 at all times.

Thanks!

[marcham]

Bit of an update. After wondering why my progress regressed, I decided to go through and test the basics (aka power). I found that the 15V line wasn’t producing voltage and quickly traced it back to a loose connection on the P2 connector.

This harkens back to one of the original problems I had when I started working on the unit. Wires started coming loose from the P2 connector. I attempted to fix this by reinserting the wires and using hot glue to hold them in place. While ‘okay,’ this solution hasn’t been great and isn’t producing the most stable connection.

Does anyone have any recommendations on where to find replacement Molex connectors for the wires? I can’t find the exact replacement anywhere.

I also tried removing the metal pins from the connector to reattach the wires correctly, but I couldn’t remove them.

Thanks, all.

• This reply was modified 1 week, 3 days ago by marcham.

[Mark-sf]

You can get an extractor tool cheaply. – i.e. https://a.co/d/j3yLCnU. If you are trying to terminate the wires with new pins, that requires a special crimp tool and new pins and housings are available in kits.

 

[marcham]

Thanks, Mark! Someone on Reddit had suggested this as a replacement, so I’ll grab a few new connectors and clips.

https://www.digikey.com/en/products/detail/molex/0022012121/1090462

https://www.digikey.com/en/products/detail/molex/0008650805/1130600

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