beomaster 1900 no 15v supply

[astro]

11.3 at 9 &10 from transformer. No 15v supply, Beomaster doesnt start, no red light diode …..Hmm… 22v at base and emittor, but 0v at collector (transistor 27  TIP22a) Clues anyone?

 

cheers, Göran

[astro]

It turned out to be two faulty transistors. So now the 15v is back, hooray! But the touch buttons dont do anything, the relay doesnt click. Any ideas what can be the problem?

 

cheers, Göran

[Pindsen]

Hi,

You need to ensure the Switch On signal is present on TR32 Basis after you have activated the touch buttons, otherwise you will not have voltage over the relay coil.

Location: Denmark

[Imax5353]

For my beomaster 2400, the 15v transistor 2TR27 that connects to the IO planel on the bottom was grounded. The plastic ring that isolates it from the screw wasn’t seated properly

[Author]

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