[TechAssist] Re: Semiconductor purchasing question
- From: Al Gutz <alg@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 08 Oct 2005 21:25:42 -0400
Ed
He has been buying his ICs at wall-fart again.
Al G
Gary McCartney wrote:
> Ed, I don't off-hand recall mentioning anything about 10 IC's for a
> buck, or a buck each even. Maybe I just don't remember.
>
> I haven't had any problems with their parts up until this one I posted.
>
> Gary
>
>
>
>
> Gary McCartney
>
> McCartney Electronics
> Guelph Ontario Canada
> Est. 1984
> email: gary (at) number63.ca
>
>
>
>
>
>
>
> Tel-Tek Electronics wrote:
>
>>Gary;
>>
>>Is that the place you told me about....10 IC's for a Buck?;-)
>>
>>-Ed-
>>E.G.
>>Tel-Tek Electronics
>>Ontario-Canada
>>
>>teltek3@xxxxxxxxxxxx
>>----- Original Message -----
>>From: "Gary McCartney" <gary@xxxxxxxxxxx>
>>To: <techassist@xxxxxxxxxxxxx>
>>Sent: Thursday, October 06, 2005 10:01 AM
>>Subject: [TechAssist] Re: Semiconductor purchasing question
>>
>>
>>
>>
>>>I recently had a similar problem. I had a Hitachi 27" that I replaced
>>>the vertical IC LA7838 and when I plugged it in, got a buzzing sound,
>>>like the SMPS wasn't working. So I replaced some caps, only to
>>>eventually find that pin 11 in the LA7838 was shorted to pin 12, the B+
>>>pin, causing the SMPS to growl. Put in a new 7838 and away it went, no
>>>problem. I got those chips at AA Electronics in Mississauga ON, run by
>>>Chinese people.
>>>
>>>
>>>
>>>
>>>Gary McCartney
>>>
>>>McCartney Electronics
>>>Guelph Ontario Canada
>>>Est. 1984
>>>email: gary (at) number63.ca
>>>
>>>
>>>
>>>
>>>
>>>
>>>
>>>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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>>>
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