Question about Philips Magnavox 51MP392H Rear Projection Television

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Where is the aluminum heat sink at!!!

Where

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  • Philips Master
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Its on the large signal panel. The vertical IC has 9 pins on it with the numbers TDA36540 stamped on it. your model may not have a heatsink. It could just be mounted on the circuit but look for the TDA number and you will have found the right component when you find those numbers

Posted on Jun 01, 2008

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1 Answer

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1 Answer

The sound on the TV completely stopped in the middle of a program. There is no sound at all now, even when the cable TV is disconnected. I tried checking all cords and wires to the speaker and TV.


Hello, I am John at J. D. Electronics. You have a D6 model. This is caused by a defective spacer under the A / V board. This is not recommended for owner repair, since it involves removal of other PCBs, Sheilds and "spacers" and connectors. On the A / V board ( the one with all the jacks ), is an audio IC that normally runs fairly hot. Therefore, the MFG had to use an aluminum heat sink on the top and bottom of the IC. The problem is that there is a "clay like " spacer pressed between the bottom PCB at the audio IC and an aluminum plate, or heat sink, underneath that sets against the metal back of the LCD panel. Here is what happened; The "spacer " turns into a "sticky goop" causing the whole pcb move towards the Heat Sink under the A / V board. This causes the connections at A / V pcb at the audio IC to come in contact with the bottom aluminum heat sink, thus shorting out the audio IC and then no sound or popping noises. This is common on the D4 and D6 models.We charge about $325 for this repair since it is very time consuming. I have repaired dozens of these sets with this problem. I hope this helps! John

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1 Answer

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1 Answer

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1 Answer

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1 Answer

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1 Answer

Convergence


Okay thats the P51A chassis that should have a small PC board on the extreme right hand side with two large black ICs mounted onto a large aluminum heat sink. they should be stamped with STK392-040 on them. can you locate the board on the right? Does it have the two large heat sinks on the baord?

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1 Answer

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