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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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Samsung hcm4215w projection tv
I have a rear projection tv I'm trying to get running. Originally it
wouldn't stay on. If I unplugged the convergence board it would stay on. I bought two new stk392-040's and installed them. The right hand side ic would get really hot really fast. So I took that one out and installed one of the older ones and the tv works now sort of. The picture is really bowtied shaped. Should I order another stk392-040 and try that, or order a replacement convergence board? Thanks for any help. jim |
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Samsung hcm4215w projection tv
On Sep 29, 11:27 am, Meat Plow wrote:
On Sat, 29 Sep 2007 05:41:33 -0700, jimmyjet wrote: I have a rear projection tv I'm trying to get running. Originally it wouldn't stay on. If I unplugged the convergence board it would stay on. I bought two new stk392-040's and installed them. The right hand side ic would get really hot really fast. So I took that one out and installed one of the older ones and the tv works now sort of. The picture is really bowtied shaped. Should I order another stk392-040 and try that, or order a replacement convergence board? Thanks for any help. jim In any event be careful with samsung sets as some can burn the crt very fast when you have problems with the convergence. Also make sure you use the exact replacement STK and clean the heatsink surface and use proper thermal goop. Myself I would go over the converge board with a fine tooth comb and look for low value 1/10 watt resistors that may be damaged and replace before trying another STK. Thank you for the reply. I bought the stk ic's from mcminone. It had the same numbers except for the date code. Someone else mentioned I should use panasonic stk's, but I haven't found any yet. The heatsink had an insulator on it and no thermal goop. Do you think I should use goop with the insulator? I will check the resistors. I appreciate the advice. jim |
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