[TechAssist] Re: Semiconductor purchasing question
- From: Wayne Vanaman <Wayne@xxxxxxxxxxxxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Thu, 06 Oct 2005 06:33:52 -0500
Bill:
Identifying the knock-offs aside, buy semis like these from B&D Enterprises.
www.bdent.com
LA7838 in quantity of 1, $1.56.
You will not get knock offs from B&D, you get Good Stuff. 2SC4834P, $2.10.
I have bragged on B&D on this list several times lately, has anyone here
ever received anything bad from B&D?
Wayne Vanaman
Omega Electronics
6904 W Fairfield Dr
Pensacola, Fl. 32506-3310
Wayne@xxxxxxxxxxxxxxxxxxxxx
WWW.PensacolaTVRepair.Com
850-456-5995 voice
850-458-6369 fax
Premium Technologies wrote:
> 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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