Question about Samsung HCM4215W 42" Rear Projection Television

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Red convergence is bad.

I can not get the red gun to align with either the auto or manual convergence modes. It will align in the center but towards the outside corners it is skewed and impossible to align. Any ideas? Thank you very much.

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Re: Red convergence is bad.

The red convergence amp has probably failed and both STK's should be replaced, along with two or more of the 3.9 ohm fusible resistors in the circuit. This is one of the more easily repairable units in the Samsung line because the convergence circuit is a separate board mounted up and away from the signal and deflection boards. But if you're not too tech savy don't tackle this yourself. Icz103 and Icz104 are both STK392-040. Check and possibly replace both FD101 and FD102 pico fuses (3.5 amp) and check all 3.9ohm/1w fusible resistors. At least two of these will be open when the corresponding STK failed. Replace the STK's with Samsung parts or genuine Sanyo STk's not their JApan knock-offs which are VERY hard to tell apart. And use a good heat sink compound when mounting the IC's for proper heat dissipation. If you have any questions let me know... Bill PS: Many Techs have taken to mounting fans on this board to cool the IC's... Fans have proven to reduce operating temps by as much as 40 degrees and extending the IC's life limit by as much as 50%...

Posted on Jun 03, 2007

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Click on the following link : Go to the following section

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(2) (3) (4)
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1 Answer

Thought I had a convergence problem - red is still broke


I dont think you have problem with Red Gun.
One of your Convergence IC is faulty with 2 RK series Resisitor(Low Value) in Convergence
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Dont forget to Rate!

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1 Answer

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Sincerely the Hammerman

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Hi, you need to change the convergence ICs , STKs: and some resistors,low values; , after changing them, you will have to go into the service mode, to do some adjustments.that's it.

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Have a great day!

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