[TechAssist] Re: FW: Samsung TXE2546, shuts down in about 2 seconds
- From: "Gemini Computer & TV" <geminitv@xxxxxxxxxxx>
- To: <techassist@xxxxxxxxxxxxx>
- Date: Tue, 10 Aug 2004 08:05:48 -0400
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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SAMSUNG TXE2545
Dead, Led Blinks On/Off, No Hv
Fred.Bobbyjonestv@xxxxxxxx
Change Q801 Tip102 And C815 10uf @ 160vdc
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SAMSUNG TXE2545
Dead, Possible Storm Damage..
D.A. Electronics
Ic801 Strs6709a
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SAMSUNG TXE2545
Dead. Q401 Shorted
Big Pines Tv
Replace Q401 (Ecg2353)
Also Check Base Resistors R413 (.39) And R407 (47).
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SAMSUNG TXE2545
Power Cycles On And Off
T.V. Doctor - Thousand Oaks, California
Bad Flyback
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SAMSUNG TXE2545
Power Supply Stalls After Set Has Run Then Turned Off & Back On
Dan Mundy Cet/Csm
Replace Ic 851 (Opto) 0640-000117
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SAMSUNG TXE2545
Shuts Down After 5-10 Min
Dennis Mcmanis Atlanta Ga
Resolder All Leads On 2 Rectifier Diodes Mounted On Lowe Side Of Pcb O Ff
Pin 1 Of Strs6301
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SAMSUNG TXE2545
Vertical Ic301 Failure Replacement Kit
Kit P/N St301 Available. You Have To Add 4 Parts And Change The Value Of
Another. Does Not Include The Ic (TDA8350)
1 - Change Value Of C302 (Ic Pin 9 To Ground) From .15uf To .22uf@100v
2 - Add A Zener Diode (Ma2560, Ecg5090a, 56v, 1w) In Parallel With C302.
Cathode To Pin 9 Of Ic301, Anode To Ground.
3 - Add A Zener Diode (Mtz15c, Ecg5024, 15v, 1/2 W) From Ic301 Pin 3 To
Ground. Cathode To Pin 3, Anode To Ground.
4 - Add A .47uf@100v Capacitor From The Yoke Pin "V2" (Green Wire) To
Ground.
5 - Add A 10uh Coil In Series With Existing Coil L304 Located Off Pin 9 Or
Ic301 Just Behind The Chip.
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Text pasted from WinSTIPS 2.0
http://www.ServiceSoftware.com
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SAMSUNG TXE2546
Width - Pulling In From Sides
Gilbert Kelley
Symptom: Picture Tearing Or Pulling In From The Side. Looks Like Black
Flames Shooting Across The Screen, And Sometimes The Black Covers The
Entire Screen.
Cure: Found C414 Cracked
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Bob Waterman, CET® #RI-28
Master Technician License #9109
Service Manager / Parts Manager
Gemini Computer, TV, & Security Alarms
(508)695-7302
(508)695-7769 FAX
geminitv@xxxxxxxxxxx
geminitv@xxxxxxx
www.geminicomputertvsecurityalarms.com
----- Original Message -----
From: "Art Bevilacqua" <abevilac@xxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Tuesday, August 10, 2004 7:58 AM
Subject: [TechAssist] FW: Samsung TXE2546, shuts down in about 2 seconds
>
> This set begins to start up, you can hear high voltage, but then it =
> shuts
> down in just a second or two.
>
> I had a "close" schematic, and was able to prove that pretty much all of =
> the
> power supply voltages, standby, from the switching power supply and from =
> the
> secondary of the flyback are all ok. The 130V supply to the horizontal
> section is good, as are the 17 and 45 volt supplies to the vertical =
> chip.
> All voltages on the vertical and audio output chips seem good, and I =
> scoped
> the flyback area and found good clean pulses (no ringing at all).
>
> Since that day (Saturday), I found the exact schematic, but wonder =
> whether
> this problem has been encountered before,
>
> Thanks, Art Bevilacqua
> Essex Radio & TV
> 40 Main St
> Essex, MA 01929
>
>
>
>
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