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 Post subject: Studio Pre troubles
PostPosted: Sun Nov 20, 2016 10:15 am 
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Bottle Rocket

Joined: Wed Nov 09, 2016 9:07 am
Posts: 7
Hi all

I probably have an LDR-problem.

It is a come/go problem - sometimes it is powering up OK but after a while i get:
Noise, standbyswitch is "bypassed" - very thin and weak signal.

So: tapping on the top side of R211 - sometimes - makes the amp work correctly for a while.
That resistor is connected to LDR 2.
I will replace that resistor - but maybe also the other LDR resistors also?

Does anybody have a list and chart over which resistors that needs to be changed?
Also what type of resistors are used and their size in W.

Thanks in advance
ReidarNikolai


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 Post subject: Re: Studio Pre troubles
PostPosted: Mon Dec 05, 2016 5:24 am 
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Bottle Rocket

Joined: Mon Jul 18, 2011 6:11 pm
Posts: 15
Do the LDRs first, search down I think I posted on how I replaced mine. That resistor you are tapping might just be resoldered.


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 Post subject: Re: Studio Pre troubles
PostPosted: Mon Dec 05, 2016 2:48 pm 
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Bottle Rocket

Joined: Wed Nov 09, 2016 9:07 am
Posts: 7
Thanks for the heads up (and pictures).

Will try this ASAP

Get back when I have tried replacing the LDR´s.

ReidarNikolai


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 Post subject: Re: Studio Pre troubles
PostPosted: Mon Dec 12, 2016 3:08 pm 
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Bottle Rocket

Joined: Wed Nov 09, 2016 9:07 am
Posts: 7
Replaced LDR 1, 2 and 3.
Everything is working as it should.
I will keep it open for a while - I am gonna give it a cap-job while I it is out of the rack.

Heads up about availability for those LDR´s the firm making them in the States have stopped doing so.
You can find cheaper ones on eBay from China - I don´t know how good they are.

Thanks
ReidarNikolai


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