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Subject: RE: [PolySix] KLM376A1-PS delivering undervoltage at test points

From: tim p <target9@hotmail.com>
Date: 2014-03-04

Am using an original Korg Uk 240v txr. Does not get hot.
From:Chromatest J. Pantsmaker
Sent:‎04/‎03/‎2014 05:18
To:PolySix@yahoogroups.com
Subject:Re: [PolySix] KLM376A1-PS delivering undervoltage at test points

 

The transformer might be under-sized... so it can't provide enough current, so the voltage is dropping.  Does the transformer get hot?


On Mon, Mar 3, 2014 at 3:52 PM, tim p <target9@hotmail.com> wrote:


In my ongoing P6 power supply saga, have got UK transformer hooked up ok but test points are reading

+5 = 3.6
+15 = 10.8
-15 = -10.7

Is this likely a problem with the transformer or more likely the voltage regulating components on the 376 board? Rectifiers shot?

Have tried adjusting trimpots but that does not make result in a noticeable voltage difference on the test points.

Have tested the two main Caps and they are within tolerance.

Any help or ideas appreciated.

Cheers