Question about Philips 28PW6506 28" TV
Pinkish purple colour with thin white horizontal zigzag strips (from top to bottom). Strips moves only slightly. I have had the painter chip board checked and found faulty and it was replace by me but still same problem can not get a picture just this pinkish purple colour with thin horizontal zigzag strips (from top to bottom). Same as before I replaed the supposed painter chip.
What most likely happened is that the person who checked it saw that there was a fault in the operation of the mentioned board. But, what he could not see because of the complexity of the set, there is a problem somewhere else that is causing this failure. There are many interactive circuits where some sections will effect others on different boards. The different boards have a high degree of interaction between them.
These TV sets are extremely complicated. What is one in the factory service, is they test the set by doing a number of test measurements, and then trying out the suspect boards in a group. Then they use the process of elimination to zero in on the faulty board. When they find the defective board they leave the new board in the set, adjust it according to the service information in the service manual, and then return the set to the customer.
Like computers, most of the service is done with board swapping. The authorized service rep will have the instrumentation and service setups to do the proper calibrations to match up the new board.
This is why I never encouraged a customer to service his own TV set. He can end up buying parts and boards that he may not need because he was testing the set by guessing. These boards are not returnable, because after the board was handled and tried, there is no guarantee that a new problem was introduced on the board. Sometimes there can be a problem on another board that damages other boards that are connected to it.
In the end, we found that it does not usually pay to try to service these sets yourself. At home you don't have the facilities to properly test the set for calibration and performance. You also don't have the diagnostics facilities, training, and engineering information to be able to properly work on the set.
Posted on Jun 01, 2008
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Posted on Jan 02, 2017
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