Question about Samsung HCM4216W 42" Rear Projection Television

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Samsung Rear Projection HD tv IC convergence green only messed up now. Help please

Had this problem about a yr ago. New ic's and a few new fuses and it was fixed. I had a tv repair guy solder the ic's in but now the blue , red work fine. I can move them up down left right but the green looks to be messed up. It seems blurred or out of focus. The tv looks fine except the green. Any Ideas? I want to check the fuses on the board so I can ask the tv repair guy to fix the fuses or I could do them myself. What settings on a multimeter do i use to read these small fuses on the IC board? I can provide pictures as well. NEw ics are in I just dont get why the green is messed up still. Im guess a fuse on the IC board is blown.

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Re: Samsung Rear Projection HD tv IC convergence green...

To check the pico fuses you're merely testing for continuity. If you get an infinate reading you're in good shape - if it doesn't budge the meter the fuse is open... That's a really easy set to work on for convergence problems - the convergence board is easily removed..
Another cause for mis-alignment like that are the youke return resistors... There are several out front of the convergence amps that may have changed in value. They are 3.9 ohm - 2w resistors and will look identical to Rz123 and Rz124 (same banding). For those simply select a low ohm setting on the meter and check to see if any of them have some way low or way high reading...
Need anything else just ask...

Posted on Dec 10, 2007

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