[TechAssist] Re: Semiconductor purchasing question
- From: "Shoreline Electronics" <jstielau@xxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Thu, 6 Oct 2005 08:13:11 -0400
We had the same type issues with the seal plastic bag SK series of the
LA7838 a few years back. Started buying them in 25 lots from Elecrosound.
Never had these problems ever again!
You would think that the RCA bagged ones would be real Sanyo parts.....who
knows.....
==========================
Jeff Stielau
Shoreline Electronics Repair
344 East Main Street
Clinton,CT 06413
860-399-1861
860-664-3535 (fax)
jstielau@xxxxxxxx
========================
----- Original Message -----
From: "Premium Technologies" <premtech@xxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Thursday, October 06, 2005 6:14 AM
Subject: [TechAssist] Semiconductor purchasing question
> Group,
> I had a Panasonic 27" in for repair today, with a not uncommon 3" high pic
> across the screen. Found three caps behind the vertical heat shield and
> the vertical IC LA7838 at fault. Replaced these and still had the
> problem. Traced and tested for about a half hour more and replaced the IC
> again, still same problem. At this point I'm fuming, going over the
> print, retesting up the circuit, ESR testing caps that I had done at least
> twice and looking for any clue as to why the IC looked as though it had
> failed.
> Finally I tried a third IC and to my surprise the pic was restored. I
> looked at the packaging and found that these three ICs were purchased from
> Tritronics and they didn't appear to be the cheap TT Chinese knock-offs.
> I'm at least intelligent enough to knowingly avoid those. In fact, I
> noted that I had paid almost nine bucks a piece for these.
> So, I went to order some things from Tritronics this evening and searched
> the LA7838 on their site. It came-up with several brands all using the
> LA7838 and all of them a different price, ranging from a couple of bucks
> to eleven plus dollars a piece. So what denotes a knock-off from an
> original Sanyo made component when all you have is the price to go by??
> None of the brands listed were Sanyo and most of them showed each of the
> brand part numbers, Hitachi and Toshiba for example, identifying it as a
> LA7838 or OEM part. It's probably how I ordered the last ones - middle of
> the road price or manufacturer number.
> This makes a about four times in the last month I've had to replace a
> component because it was a failure right out of the box.
> I'll be calling Tritronics tomorrow but this seems like an epidemic that
> obviously could be cured at the supplier's end. Besides, I just hate
> wasting money on such a small margin repair as this one.
> Anyone else had a similar problems lately with Tritronics parts?
> Bill
> William Rayburn, CET
> Premium Technologies
> PO Box 442
> Long Beach, WA. 98631
> 360-642-4993
>
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