[TechAssist] Re: Zener diode test
- From: "J Silverman" <greentron@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 9 Jun 2005 16:09:05 -0400
That sounds like 2 zeners in series back to back in one package. They would
conduct at approximately 9.1 volts with either polarity.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
Fax/Phone 864 232 3889
mail to: greentron@xxxxxxx
----- Original Message -----
From: "Paul" <dntwntv@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, June 09, 2005 2:02 PM
Subject: [TechAssist] Re: Zener diode test
> Yes, I agree. They appear to be just 1/2w Zeners, although very small
glass cases. I measured a 9.1v, 1w that I had in stock and it measured fine
on both meters. Interesting though, I checked to see if they would zener and
they do 9.4v. They still don't front to back. How do you figure that? These
are in a 2 year old set and are used in the A/V input circuit apparently as
protect.
> Paul
>
> Jerome Silverman <greentron@xxxxxxx> wrote:
> Sounds like plain vanilla 9.1 volt zeners. But to answer your question,
some
> "zeners" are actually ICs and some have one or more forward biased diodes
in
> series with the zener element and some may consist of two or more zener
> elements in series.
> Jerry Silverman
> Greentron Inc
> 4 Newland Ave Greenville SC 29609
> Fax/Phone 864 232 3889
> greentron@xxxxxxx
>
> ----- Original Message -----
> From: "Paul"
> To:
> Sent: Wednesday, June 08, 2005 9:44 PM
> Subject: [TechAssist] Zener diode test
>
>
> > Are there zener diodes that cannot be measured? I have 4 Sony zeners P/N
> MTZJ-T-77-9.1B on a board. They do not cross and I am guessing they are
9.1v
> zeners. They all are either open or they do not measure. Have lifted one
end
> and measured with two different meters,Beckman and a Fluke still no
reading.
> Can't believe all 4 are open.
> > Paul
> >
> > Paul ,B
> > Central TV&Video
> > 911W Grand Ave
> > Grover Beach Ca.
> > (805)481-8084
> >
>
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> Paul ,B
> Central TV&Video
> 911W Grand Ave
> Grover Beach Ca.
> (805)481-8084
>
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