Beomaster 3000-2 Type 2402 15V Power Supply Not Activating

[Johnny Law]

Hi All –

This is a cross-post from AudioKarma (thread here) but I am hoping folks here may have more experience with this …

Basically, in my 3000-2, the 15V power supply is not activating unless I touch TR17B or TR17C with something metal.

Once I do that and it switches on, the 15V power supply works great and I can listen to music (via Tape input) no problem.

The unit has all new electrolytic capacitors including the main PS cap and both output caps, and new rectifiers.  I’ve confirmed every single component in the 15V PS circuit is operational.  I’ve also de-oxited all the pots that are fed by the 15V PS.

Through a DBT, the below in yellow are the values before it starts conducting, but after I touch TR17B or TR17C and switches on, then the green values appear and all is good.

Any ideas as to why TR17 doesn’t start conducting on its own when the unit is powered on?

Scratching my head over here.  Appreciate any tips, suggestions, follow-up questions … thank you!

[Author]

Posts