"Bill Carpenter" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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I'm still struggling with the PS7. I've replaced the 723 twice, the zener
diode and the caps seem to be OK to me. The supply works and the voltage
adjusts fine but voltage decreases starting at only about 5-10 watts output
and shuts the PS7 down. I seem to be going backwards as it would go to
about 40 watts before and shut down. I'm a technical dummy so simple
explanations please - if possible :)
ANY help greatly appreciated.
----- Original Message -----
From: "Ron Wagner" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, June 11, 2007 8:50 PM
Subject: Re: [drakelist] PS7 shutting down
Ron Wagner <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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Based on the PS-7 manual page 4, the "120" selection is for 108-132 volts
input. And yes I doubt that voltage that low would run the PS-7.
Given the sequence of events, my personal guess would be that a filter cap
opened or lost capacity. Check the "small" 12 volt power supply used for
the voltage regulator board. The 723 family can get rather strange with
VCC under voltage. Its voltage would sag as you draw from the primary.
Also check the primary supply caps.
73,
Ron WD8SBB
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