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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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Schematic for a Philips 55p8241 projection TV
Hello All,
Being a long time lurker here I'm turing to all of You for help. My mother-in-law has been after Me for some time now to come over and look at her late husband's bigscreen TV.I'm getting it from the wife now too, so I can not put this off any longer. The unit works great for a short time, but then the sound cuts out(thermal/solder joint/cap trouble). I am going to be going into this unit in the next couple of weeks, but I'd rather have a schematic to save me time tracing the whole chassis. I'm a 24 year electronic tech, have all of the equipment and can do it the hard way, I'd just like not to have to spend any more time than I have to on this one. Can anyone help??? Thanks! |
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Schematic for a Philips 55p8241 projection TV
"LTT" wrote in message ... Hello All, Being a long time lurker here I'm turing to all of You for help. My mother-in-law has been after Me for some time now to come over and look at her late husband's bigscreen TV.I'm getting it from the wife now too, so I can not put this off any longer. The unit works great for a short time, but then the sound cuts out(thermal/solder joint/cap trouble). I am going to be going into this unit in the next couple of weeks, but I'd rather have a schematic to save me time tracing the whole chassis. I'm a 24 year electronic tech, have all of the equipment and can do it the hard way, I'd just like not to have to spend any more time than I have to on this one. Can anyone help??? Thanks! I think you're on the right track, just look for cold solder joints in the power supply or horizontal section, a can of freeze spray might be useful too. |
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Schematic for a Philips 55p8241 projection TV
First off, you need to determine the general area where to look.
It is also possible that the set is in the wrong audio mode in the user menu, check that first. Does it lose audio only on the tuner? Does it lose audio on the A/V inputs? If the set has audio output jacks, does it lose audio there also? You will need to buy the Service manual from Philips as there is no way to copy it from the copyrighted Philips Force CD-Rom service information that authorized servicers have to use. At least audio problems are generally easy to trace back with little equipment, an audio signal injector and an audio signal tracer (amplified speaker). David LTT wrote in message ... Hello All, Being a long time lurker here I'm turing to all of You for help. My mother-in-law has been after Me for some time now to come over and look at her late husband's bigscreen TV.I'm getting it from the wife now too, so I can not put this off any longer. The unit works great for a short time, but then the sound cuts out(thermal/solder joint/cap trouble). I am going to be going into this unit in the next couple of weeks, but I'd rather have a schematic to save me time tracing the whole chassis. I'm a 24 year electronic tech, have all of the equipment and can do it the hard way, I'd just like not to have to spend any more time than I have to on this one. Can anyone help??? Thanks! |
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Schematic for a Philips 55p8241 projection TV
Hi David,
I got a look at the set the other day and I know the following: The sound is set up correctly. All menu items have been checked and rechecked. The set drops audio only to the internal speakers. The AV outputs still function normally.(I'm guessing the audio amp is My first stop.) The audio starts off(cold set) working normally, then after a short time the audio just cuts out(sounds like solder joints/thermal trouble.) I can trace the set, and have all of the equipment to do so. I was just hoping that I wouldn't have to go in "Blind" and that someone here might have the schematic. I will have to see if I can get a cost for the service manual Does anyone have an address(web site) for them? Thanks! "David" wrote in message ... First off, you need to determine the general area where to look. It is also possible that the set is in the wrong audio mode in the user menu, check that first. Does it lose audio only on the tuner? Does it lose audio on the A/V inputs? If the set has audio output jacks, does it lose audio there also? You will need to buy the Service manual from Philips as there is no way to copy it from the copyrighted Philips Force CD-Rom service information that authorized servicers have to use. At least audio problems are generally easy to trace back with little equipment, an audio signal injector and an audio signal tracer (amplified speaker). David LTT wrote in message ... Hello All, Being a long time lurker here I'm turing to all of You for help. My mother-in-law has been after Me for some time now to come over and look at her late husband's bigscreen TV.I'm getting it from the wife now too, so I can not put this off any longer. The unit works great for a short time, but then the sound cuts out(thermal/solder joint/cap trouble). I am going to be going into this unit in the next couple of weeks, but I'd rather have a schematic to save me time tracing the whole chassis. I'm a 24 year electronic tech, have all of the equipment and can do it the hard way, I'd just like not to have to spend any more time than I have to on this one. Can anyone help??? Thanks! |
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