[TechAssist] Re: Emerson TS2750D, STR51041 repeat failure and runs hot

  • From: "David Lessard" <mrfixit@xxxxxxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Mon, 9 Jun 2003 13:25:59 -0400

Jim, Which two transistors and two resistors have failed before? In the P.S.
ciruit? The more information we have the better we can all help.

David Lessard
Alexandria Electronics
Ontario-Canada
mrfixit@xxxxxxxxxxx

-----Original Message-----
From: techassist-bounce@xxxxxxxxxxxxx
[mailto:techassist-bounce@xxxxxxxxxxxxx]On Behalf Of Jim Myers
Sent: Monday, June 09, 2003 1:13 PM
To: TechAssist
Subject: [TechAssist] Emerson TS2750D, STR51041 repeat failure and runs
hot


Would anyone have an idea on this problem? The set seems to work ok but the
regulator IC, STR51041 seems very hot. The case temp gets up about 70 c
after 30 minutes or so, that's about 158 f. The data sheet shows the max
operating temp as 125 c or 257 f. Well within specs but still pretty hot. It
has failed twice along with two transistors and two resistors. Capacitors
have been checked and/or replaced also.
**************************************************
Jim Myers
Since 1972
Telrad Electronic Services Co.
Fort Wayne, IN 46815
*************************************************

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