Reply To: Beogram 4004 (Type 5526) Issues

#10637
StanfordBeogram
BRONZE Member
  • Topics Started 3
  • Total Posts 15

Hi Mark,

I am currently in the process of replacing all associated components in both the servo motor control and solenoid circuits. Upon inspecting TR-22, (the BC143 transistor)I found that it does not test properly and I compared it with the one on my other 4004 board that functions properly. I suspect that this transistor has failed and I ordered a NOS replacement from Littlediode in the UK. It should arrive in the next few weeks. I will report back the findings and hopefully this solves the issues with this board. Thanks!

Ian