[TechAssist] Re: ctc187cl3 F32672sb
- From: "Webster TV" <webstertv@xxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 23 Mar 2004 08:35:47 -0600
Peggs,
R4402(#175374) in base circuit of H.O.T. can cause instant failure of H.O.T.
even at reduced AC voltage. Replace resistor even if it checks OK. Also I
assume you checked the solder connections on the horiz. driver transformer?
Dan Webster
Webster's TV
Shullsburg, Wi.
----- Original Message -----
From: "peggs" <peggs@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Monday, March 22, 2004 7:02 PM
Subject: [TechAssist] ctc187cl3 F32672sb
> This 32" rca had a shorted HOTransistor.
> I replaced it with a 2sd1879(winstips)
> along with C4105 10uf/250v.
> Flyback rings good as well as the Yoke.
>
> It ate the new HOTransistor.
> I noticed B+ was about 150v at plug-in,and it popped at turn on
> and ate the HOT.
> With the HOT out,the B+ is at 150v in stand-by,and only drops
> to 147v at power on.
> I replaced the regulator STK730-150,with the same results.
>
> The Flyback(as well as an OEM HOT) is now on order because
> of the 'pop',but I'm still worried about the B+.
>
> I resoldered the PCB also.....
>
> Peggs
> Peggs' Electronics
> 1519 West 2nd Street
> Owensboro,KY 42301
> 270-926-4968
> fax 270-686-7399
> peggs@xxxxxxxxxxxxx
>
>
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