Question about Televison & Video
Above is your user manual, below is your service manual. It is a pay for one, but i searched and was unable to find a free one, but to even have a chance you MUST get a service manual.
Before we can attempt to repair anything at all, there is one thing that one MUST do before anything else is done. Now that is, the making sure that the Power Supply,of the unit, no matter what it is, has the correct Voltages, coming into it, and more importantly, coming OUT of it. This is absolutely imperative, as, IF these Voltages are NOT correct then NOTHING will work, properly at all. So we must measure these voltages with a Volt Meter. All Voltage measurements are made with reference to ground. Meaning we clip, our Black, Minus, Lead onto the Earth, or Chassis, or Negative (-) "Rail" of the Power Supply. Now with the Red lead, we can now, measure these Voltages. Now sometimes, the Voltage of each Output is annotated,or written, onto the PCB, that will indicate the Voltage of that output. However most usually they are NOT, so in this case we MUST have a manual to tell us. Now this manual is called a "Service Manual" or sometimes a "Repair manual" This manual is absolutely vital so much so, that it can be near impossible to do without it. As apart from having "Troubleshooting" step through's, it also has our Voltages. When we measure these Voltages they are 100% EXACT, so IF the Voltage you measure, except for a few rare exceptions, the "Rail" that is NOT at the correct voltage is the one, that the "Fault/Cause" is "ON". Therefore we can now work outwards from the Power Supply, looking for the cause of that problem. Now if the Voltage is Lower than specified, we are invariably looking for a "Short", something has "Faulted" and is "Dragging" the Power Rail down to earth. Now if the "Rail" is "Higher" than the specified Voltage then the fault we are looking for is usually some sort of "Open Circuit" possibly a Diode, or resistor that has changed it's "Value". Now knowing this and knowing that the Power Supply is the FIRST place to start you troubleshooting and repair from. You now have a MUCH better chance of a "Fix". One thing more, DO NOT forget to get your SERVICE MANUAL. for you exact make & model. even if you pay for it, you will be glad you did.
The set Turning OFF is the key after a while, what is happening is that some component most likely in the PSU, is breaking down, under thermal load, now the fix for this is to get some Freeze Spray, from say Radio Shack etc, and in the PSU, carefully spray it on the components that are hot, try the hottest first, and the one that when you spray it clears or reduces the fault, is the faulty one.
But as always first you must check, are your voltages correct, measure them all.
Posted on Sep 10, 2010
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Jan 19, 2010 | Office Equipment & Supplies
Nov 22, 2009 | Televison & Video
Nov 17, 2009 | Sharp Office Equipment & Supplies
Nov 17, 2009 | Optoma DS303 DLP Projector
Jul 20, 2009 | Samsung DLP HL-P4663W 46" Rear Projection...
Mar 17, 2009 | Samsung HLR5067WX 50" Rear Projection HDTV
Mar 12, 2009 | Samsung HL-P5063W 50" Rear Projection HDTV
56 people viewed this question
Usually answered in minutes!