[hcraig244]

Found this in a 2012 – 2022 archived post “justins BG4000”

Powered up and this is what transpired:

unit sat powered up with no actions
upon hitting Start the platter drive started up at 33rpm
the panel ilumination lamps came on
the 33rpm speed selector lamp cam on
However the transport drive motor didn’t run, I could change the speed from 33rpm to 45rpm but no other functions responded. Time to look at the circuit diagrams…… 

This is what I found….the following components where shot:

 

1D11 Diode
1TR33
1TR31
1TR30
1TR32
 

All of the components on the opposite side of the motor tested good.