[TechAssist] Re: warning about sony horiz output transistors
- From: Jorge Camboni <geomvd@xxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sun, 20 Jan 2002 01:09:43 -0600
YOU KNOW WHAT? U CAN USE A D1881 WITH GREAT ADVANTAGE, IT WILL RUN COOLER
AND SAFER (THOSE "ORIGINALS" USUALLY RUN HOT AND DIE FREQUENTLY)... AND
THAT'S ONLY ONE EXAMPLE AMONG HUNDREDS. JUST SUBSTITUTE WISELY
JORGE GY ELECTRONICS, DALLAS
At 05:11 p.m. 19/01/02 -0500, you wrote:
>Hi fellow techs,
>I thought I would pass this along....
>
>I had a sony tv come in the shop with blown horiz output transistor.
>I am very firm on using sony original parts on these.(even with higher costs)
>I ordered the horiz output from a sony supplier in michagan.(has been my
>source for sony parts for years).
>after getting the set running, the h.o.t. ran too hot after 4 mins.
>the right side started bowing in so I removed power.
>Knowing this is sony orig part I did the usual, changing caps in drive
>circuit etc....
>Checked waveforms, replaced several parts incl the drive transformer.
>So I called them up and got the sony service tech, he tells me that there
>are several counterfeit transistors on the market,and they are now finally
>working thier way into the sony suppliers and sony factory parts.
>now we have to be careful with sony orig parts too??????
>go figure!
>I did reorder and get an actual orig one and set worked fine.
>I noticed on the counterfiet one the 2sc4927 numbers were very bright white
>and the orig was faded dark.
>keep this in mind the next time you have this problem.
>so much time and parts spent because of this bogus part!
>I do thank the tech for being honest.
>sorry so long,
>gary
>CHAMBERS TV
>BRADENTON,FL
>SINCE 1982
>
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