Re: wg6100 HV problem

Well like I said it wokred fine for at least 48 hours, before it started
having problems. Internal Diode short I would imaging. So just doing a ring
test may show up good. The part may not fail until it's been under load.
Could just be a fluke too..

Kevin

On Fri, Oct 30, 2009 at 11:31 AM, Pat Danis <patdanis@verizon.net> wrote:

> Mark:
>
> That flyback was one of 3 of the "new replacements" I purchased from an
> individual who I found had purchased them from Zanen electronics. I let
> Kevin have it so that he could fix his HV cage. I had not used these before
> and assumed he would have no problems.
> Interesting that it has that issue. I will check the other 2 hopefully
> some time this week with my flyback tester and see if they are faulty.
>
> Pat
>
> Mark Shostak wrote:
>
> Where did you get the flyback?
>
>
> On Mon, Oct 26, 2009 at 10:07 PM, Kevin Moore <talon.k@gmail.com> wrote:
>
>> Well orignally, it had a blown flyback, and most of the caps were shot.
>> Replaced the flyback, caps, put a zanen kit in basically. It came right up
>> after all that. Ran for about 48 hours, then blew c902, and took out r901.
>> Replaced the cap, and resistor, now it eats r901 in 10-15 mins. Looks like
>> the new flyback I installed might have gone bad.
>>
>> Kevin
>>
>>
>>
>> On Mon, Oct 26, 2009 at 8:47 PM, Mark Shostak <shostakmark@gmail.com>wrote:
>>
>>> Is it / was it producing any high voltage?
>>>
>>> What was the original symptom when you started?
>>>
>>> What has been done, other than replacing R901, R907, Q900 & Q906?
>>>
>>> Did you install or recently install a cap kit?
>>>
>>> What are the voltages from each pin of Q900 to ground?
>>>
>>> Thanks,
>>> -Mark
>>>
>>>
>>> On Mon, Oct 26, 2009 at 8:04 PM, Kevin Moore <talon.k@gmail.com> wrote:
>>>
>>>> Hello all,
>>>>
>>>> Trying to figure out a problem with a HV board. I'm pulling about 16v
>>>> across R901. R901, and R907 have been replaced with 3.9ohm 5watts. But for
>>>> the life of me I haven't been able to figure out why it's pulling that much
>>>> voltage. My others are only pulling about 2-3v. Naturally it burns up the
>>>> resistor in short order.
>>>>
>>>> q900, and 906 don't appear to be shorted, and I have swapped them for
>>>> good measure. I've been taking measurements, and checking everything, and
>>>> all seems good. I've been staring at these schematics now for hours trying
>>>> to figure out where the problem might be, and I'm at a loss right now. Brain
>>>> has officially locked up for the evening.
>>>>
>>>> Hoping one of you guys can point me in the right direction.
>>>>
>>>> Thanks,
>>>>
>>>> Kevin
>>>>
>>>>
>>>
>>
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Received on Fri Oct 30 12:35:11 2009