Question about Samsung TXN3245FP 32" TV

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Hey tech got a tough dog on this samsung model txn3245fp set was dead .h.o.t was shorted replaced it and the flyback after i did i had standby power as soonas i hit the power buttion hot shorted again cheaked r818 and r821 and all other componenets esr all the caps im begaining to think it might be the smaller flyback that is in tamdum with main fly dont know about b+ voltage ive not had it on long enouh to know is there something im missing thanks

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  • Samsung Master
  • 5,807 Answers

To determine the cause, you might have to take out

the Horizontal Output Transistor.


There can be two points , where you can check

the Supply B+ to your Flyback

a ) Direct measurement on the Collector terminal

pin on the PCB ( after you have extracted )


b ) Direct measurement on the 200V line and post

the voltages.




Next after noting it down,


You will need to unplugged the yoke


You will also measure the voltages later

When you reinstall a new one ( But do not , yet

till I know the B+ you are having )


when these is connected and unconnected,



These is it for a while , while I would be suggesting

more, after I have known the B+ that your

Flyback is having.




These are your possible causes:

a ) capacitor parallel to the Horizontal Out Transistor

b ) bad yoke

c ) partially shorted Flyback

d ) fake Horizontal Output transistor

e ) Over driven Horizontal output due to

HDT and onwards to the osc.

( from the jungle IC )

f ) High B+

h ) High Voltage has exceeded its limit.

Posted on Sep 15, 2010

  • 1 more comment 
  • Rommel Cana
    Rommel Cana Sep 15, 2010




    • here is where you can measure B+




    The unit will run, if there is no Hor Out Xsistor


    There will be about 215V on D411 if the


    Flyback




    oscillates

    ( H Out Xsistor connected of course )

  • Rommel Cana
    Rommel Cana Sep 15, 2010





    • you may have to check on these circuits


    if your B+ is higher than Normal


  • Rommel Cana
    Rommel Cana Sep 15, 2010





    • and you might also have the CRT Board disconnected

    from the CRT Socket , only when troubleshooting.

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