Question about Samsung HCM4215W 42" Rear Projection Television

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Samsung hcm4215w keeps blowing conv resistors

Hi i have this tv and replaced rz142 and rz143 and the stk 392-040 next to those resistors.....the same 2 resistors keep blowing as soon as i power the tv on and try to do convergence......

i didnt repalce the other stk since i didnt think it has anything to do with the res blowing...prior to this happening i couldnt move blue up or down...everything else worked fine....and when i originally checked the rz142 143 they were both blown so i replced them and they blew again so i repalced them and the stk 392-040 right next to the two res and they blew again but i didnt repalce the other stk......

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  • dcxguy48080 Jan 11, 2009

    these resisitors are convergence resistors usually bad stk cause them to blow..but i replaced the stk and they keep blowing the same 2 resistors

    rk142 and rk143 on the convergence board........i just want to know what could be causing these to blow all the time instantly


  • dcxguy48080 Jan 11, 2009

    could you tell me if rk142 and rk143 are 3.9 ohm 1 watt??

    thats what i keep repalcing them with and they blow everytime


  • dcxguy48080 Jan 11, 2009

    well ii look slike they should be 3.9 ohm 2 watt......is that correct And if so if i use 3.0 ohm 1 watt would that cause them to blow??

  • dcxguy48080 Jan 11, 2009

    yes it says 3.9 ohm 2 watt..........i dont have any

    can i uses 2.2 ohm 2 watt and try that???

    the 3.9 ohm 1 watt i have kept blowing




  • dcxguy48080 Jan 12, 2009

    i have replaced the stks.......and there is no pico fuse on the convergence board......where is fd102 at?

  • dcxguy48080 Jan 12, 2009

    i coukld not see any pico fuse at all on the convergence board

    usually they are green..........but nothing there..


  • Shahid Electronics
    Shahid Electronics May 11, 2010

    you should use 3.9 2w resistor as recommended in schematics. alternate part can cause of more damage. if you still want to give a try, can do it at own risk.

  • Shahid Electronics
    Shahid Electronics May 11, 2010

    Resistor value should be as per service manual specifications. I do not have this particular model schematics thats why asked you, do you have its service manual?

  • Shahid Electronics
    Shahid Electronics May 11, 2010

    Do you have service manual or schematics of same model to check what can be cause of these resistors blown off?

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  • 240 Answers

Look Do this
Replace your STK's
I dont trust them any more after all that info, wow

anyway
replace them
and yes you need Rz123 and Rz124 to be 3.9Ohm @ 2w don't sub.
Now also order a, 3.5a pico fuse for location Fd102s.


regards,
hope this helps you.
daniel.

Posted on Jan 12, 2009

  • Daniel Conklin
    Daniel Conklin Jan 12, 2009

    you have to finde the right parts no subing.

    and yes if you are yousing 1 wat and not 2w thay wiil burn..

    fuse is not on schematic its located under fins of heat sink on convergence ic's sum times ther are two of them. fd101s and fd102s

    samsung part number is 3601-001065 thay are all on convergance amp pcb.



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William Rayburn, CET
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