Question about Samsung HCL4715W 47" Rear Projection Television

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Red CRT is dim....

Please read. Everyone keeps writing the same thing, without reading the description. Put in new PCB SUB to fix convergence (fixed) But Red CRT is now dim (all connections checked) Screen controls are located directly on each CRT board, NOT the Focus block. (Focus controls work) Screen control wire from PCB SUB directly goes to Red CRT first, then Green and Blue complete the series. Tried to adjust the Red CRT screen control dial so red is not dim. (No response). Green and Blue CRT are fine in brightness, but their screen controls do not work also, probably becuase they are in series with Red. MY QUESTION: How do I diagnose, why the screen controls do not work. I need increase the Red, so it is not so dim. Or do I have other problems. Someone mentioned to me the 220V line....

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Yes I did. You will need to get a service manual for this TV set to trace the voltage coming from the sweep power supply. If this is a problem that is new after you replaced the convergenbce4 board, you for sure have a broken wire or connection somewhere in the set. Have seen this happen may many times after a novice repairs a TV set. Good Luck

Posted on Sep 07, 2007


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