[TechAssist] Re: Sansui CTV model TVS2540C, dead, smps pulses.
- From: John at Main TV <maintv@xxxxxxxxxxx>
- To: techassist@xxxxxxxxxxxxx
- Date: Sat, 09 Aug 2003 10:37:53 -0600
It appears tje TVS2540C is similar to the TVS2740 which is in Sams 4428.
It has a D528 (5.6v zener) in the feedback circuit, that could explain
why the TV shuts down now. TVS2740 uses a SMPS with IC STR-F6624.
Please let me know if this works out so I can add it to my notes. John.
Jim Myers wrote:
> Update:
> With the shorted zener removed the pwr supply comes on then off right away
> and no drive to the HOT, looks like I'm gonna need a print to trace the
> problems, does anyone have one they could share? Temporary loan of course!
> Thanks,
> **************************************************
> Jim Myers
> Since 1972
> Telrad Electronic Services Co.
> Fort Wayne, IN 46815
> *************************************************
> ----- Original Message -----
> From: "Jim Myers" <jr.myers@xxxxxxxxxxx>
> To: "TechAssist" <techassist@xxxxxxxxxxxxx>
> Sent: Friday, August 08, 2003 5:02 PM
> Subject: [TechAssist] Sansui CTV model TVS2540C, dead, smps pulses.
>
>
> Found a shorted Zener, D528, in the opto isolator circuit cold ground side.
> Can anyone help ID the zener, the numbers on it look like 55B or B55.
> Thanks,
> **************************************************
> Jim Myers
> Since 1972
> Telrad Electronic Services Co.
> Fort Wayne, IN 46815
> *************************************************
>
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--
John Mielke
Main TV
Longmont,Co 80501
303 776 6955
303 776 0792 fax
maintv@xxxxxxxxxxx
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