TS24 - C30

Founded in 1973, Soundcraft first made its mark with the launch of the Series 1, the first mixing console in a flightcase.

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TS24 - C30

Postby rekorder » Tue Feb 24, 2009 7:02 am

Hello there,

I'm just having the fun of replacing the caps and switches in my TS24 to the few thousand replacements I have purchased recently... But there is one strange thing I realized with C30 on the left-hand PCB: In some modules it is soldered in the opposite way than in the other. And it looks as this was not done when replacing them They all look original.

Look:
Image
Image

Since it's axial there is no hint printed on the PCB like for the radial ones. The schematics:

Image

Any idea which is right here and why some are wrong?

thanks

Chris
rekorder
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Re: TS24 - C30

Postby GJC Designs » Fri Mar 20, 2009 3:28 am

In reality it probably does not really matter which way round the cap goes as the DC accross it should be in the millivolt range. If you want to be absolutely 100% sure you are putting the cap in the optimal orientation, measure accross it with a DC meter whilst the module is powered-up. Take measurements in the two console / channel modes that switch audio through TR9 and TR10.
Take a look at other similar circuit blocks in the console where FETs feed a cap, then a resistor then a TL072 op-amp. Which way round are the caps in those other circuits?

Hope this helps.
Gareth
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Re: TS24 - C30

Postby rekorder » Fri Jun 26, 2009 2:25 am

Well,

I didn't have to measure, since I found there is one Rev 4 Module in my desk other than the Rev 3's. The 4 doesn't have any axial caps an the direction is printed on the boars, so I guess this is the direction to use. Just I don't remember the orientations right know. So, if there is any interest, I may look it up and if not, well...

Thanks anyway GJC

Chris
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