[TechAssist] Re: Magnavox 25p6 chassis, 130v is too high

Chg the STR30130. john q.

----- Original Message -----
From: W. Blakey <wblakey@xxxxxxxxxxxxxxxx>
To: tech assist <techassist@xxxxxxxxxxxxx>
Sent: Friday, December 28, 2001 4:34 PM
Subject: [TechAssist] Magnavox 25p6 chassis, 130v is too high


> I have been working on this beast trying to find the reason for the b+
being too high. It has an STR30130 regulator which is used in a special
circuit that drops the b+ to about 17v in standby. That is ok but when the
unit is turned on there should be about 132v applied to pin 2 of the
regulator creating 130v at pin 4 but I get 143-4 on pin 2 and about 140v on
pin 4. I have tested all transistors, diodes and resistors around the power
supply circuit and found nothing to cause this problem. I hope that someone
can help me with this as it is driving me crazy. Thank you.
> Wilf Blakey/Blakey TV,Kirkland Lake,Ont
> wblakey@xxxxxxxxxxxxxxxx
>
>
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