RE: Still trying to solve this K6100 HV

No, but I checked its output on my counter and got 19.8khz. Seems to be working (though I didn’t scope the output).

From: owner-vectorlist@vectorlist.org [mailto:owner-vectorlist@vectorlist.org] On Behalf Of Malcolm Mackenzie
Sent: Saturday, October 15, 2011 8:21 AM
To: vectorlist@vectorlist.org
Subject: Re: VECTOR: Still trying to solve this K6100 HV

Have you replaced the 555 timer ic?

--- On Fri, 10/14/11, David Shoemaker <davids@oz.net> wrote:

From: David Shoemaker <davids@oz.net>
Subject: VECTOR: Still trying to solve this K6100 HV
To: vectorlist@vectorlist.org
Date: Friday, October 14, 2011, 11:24 PM

I am still digging into this HV unit which is giving me some troubles. Here is what I have observed.

The collector of q901 is way off of spec and I don’t understand the circuit well enough to understand what is causing it. And the base / emitter of Q900 are about double what they should be.

I have checked the values of all the resistors and they are fine.

I have replaced q900 with a bu406d (verified good in another HV unit).

I have replaced q901 & q902.

Any suggestions? Thanks.

I have attached a copy of the schematic with my noted values in red.

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Received on Sat Oct 15 12:55:35 2011