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Horz Output p#274762 & G2 to set for 290v

I changed the HVT on my RCA 32 inch 32v434t and now at least it will power on......Now it stay's on for about 10 second's just as you said and it shut's off. Where do I find this Horz Output p# 274762 on the board? And also where do I find the G2 to set for 290v. Is this adjustment on the side of the HVT or somewhere else. Also where do I hook up my volt meter to make this adjustment?
My e-mail is : morgan3@vtisp.com if you can help me out here please...
Thanks Clay,

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4 Suggested Answers

  • 1694 Answers

SOURCE: power problem rca 32v434t

RCA 32V434T likely has a bad flyback--#271996. RCA 32F531T flyback no longer available,#262343 Fix one,dispose of other.

Posted on Sep 26, 2007

SOURCE: RCA 32v434t loss of power

yepp. throw it away and buy something better than RCA. these sets are the worst RCA ever made.they dont even supply parts during the warranty anymore........

Posted on Jan 11, 2008

  • 71 Answers

SOURCE: RCA 32V434T (32'') TV has no Red or Green pixels, only Blue

The color problems are caused by cracked/broken solder joints on the circuit that controls the display.  Usually this is located at the back of the tube on a small circuit board. Your description suggests that only the blue signal circuit is intact. I suggest these joints be resoldered for more strength.
It's a possibility that another IC senses this problem (or another one) and then shuts down the system.
Resolder those joints and see what happens.

Posted on Jun 03, 2009

artiedc
  • 35 Answers

SOURCE: got an rca 32v434t, plugged in hooked up, and it

we would need more information:

has TV worked before
how many hours has TV been used

I have seen this 'ShutDown' on many failing monitors..


Typicaly the Power Supply circuit in your TV
have 'Over Current' detection\protection
and your 10 second is just about how long somthing is probly taking to either:

over current and shut down
or more specifically:

one or both things wrong with it:

bad electrolytic capacitors ( maybe )
but if it's a perfect picture for all 10 seconds then probobly some specific semiconductor or module is: 'Heating Up' then 'OverTemperature' and failing in a manner that causes an immediate overcurrent condition, shutting off the TV.


- give more information

- if capable of safely removing the back of the TV to allow for inspection...
,
WITHOUT GETTING ELECTROCUTED
by the high voltage that remains stored inside the tube, even after power has been removed !
,
then pop her open and have a look at
the PCB's ( circuit boards )

if somthing has been running hot and has led to this type of failure; then your circuit board will be discolored near the mounting of that device... You may even notice a burnt pcb smell at that area.

anyhow

somtimes you can find these semiconductors or modules in catalogs or online ( OfCourse )

and yourself or sombody with sufficient knowledge of soldering and the
' Potentially Life Threatening Hazzardes '
that exist around CRT monitor repair....

... can go ahead ad replace the suspect part.


Ed

Posted on Jun 16, 2009

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When the HVT goes out, it will take the HORZ output, in short, you will hear a high pitch noise for a sec, when pluged in. As to your question, Its not a hard repair, however its not what I would call a begainer repair. This is what make the high voltage (about 32,000 volts) for you set to work. If you DO try it, becareful. And don't forget to change Horz output p# 274762. After changing the parts, unit will not run for more then 10 seconds. You have to use a volt meter and set the G2 for 290v, with no signal and blue screen. + or - 5 volts will cause unit to shut off.

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2 Answers

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You can get one from Here
http://www.partstore.com/Part/Thomson/RCA/237470/New.aspx
I would only use the original part. This site I gave you is for the original Horizontal output transistor. If the part goes bad again, or runs hot, the capacitors in the circuit or the flyback is bad. Good Luck

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  • proceed as given after your power supply is ok (your statement)
  • isolate power supply from h/output stage.
  • check diodes & capacitors connected with flyback transformer.
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  • ckeck h/output transistor.
  • connect supply to h/output stage.
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still there is a drop in voltage then your fly back transformer faulty.

 

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please go according to procedure 1 isolate h/output section supply. 2 check power supply output is ok if not repaire it. 3 after power supply is ok 4 check hor osc, driver &output if problem repair it. 5 check for loose contact or print break. 6 connect supply to hor section. set will work fine. good luck.

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