SERVICE DESCRIPTION - PLEASE READ IN FULL! Coppell TV Repair LLC offers a REPAIR SERVICE for the power supply board.
Shown on the picture and used in VIZIO M75-E1 LED TV. REPAIR SERVICE means you have to send us your board, which we will test, service (if necessary) and return back to you. Section below for some guidance on whether you may need this service.
Upon receiving the board it enters a processing queue along with all other packages received on the same day. When we open the package we first evaluate the physical condition of the modules for meeting our board requirement criteria (see below). Then we put the board in a testing jig and verify that it is malfunctioning. Exception is made to power supply boards which are usually only bench tested.
If we determine it functional we get back to you. If the board tests faulty we proceed to troubleshooting and repairing it. If board is repaired and tested properly we directly send it back and do not communicate the success. There are two common failure symptoms for the TV when this board goes bad.
The first is of a totally dead TV, no signs of life and no response to commands. The second is the front LED indicating that the TV is turning on when the power on command is issued with the remote however the TV never starting up. Alas both of those can also be caused by a failed main board and as such can not be reliable indication that the power board is bad. Please make sure to bench test your power supply board before ordering this repair service to avoid spending unnecessary costs and time in moving it back and forth. A blown main fuse is 100% certain to indicate failure on the board.Do not replace just the fuse, though - it'll blow again. If the main fuse is not blown that is still NOT a guarantee that the board is good.
It needs to be bench tested for output and response to control signals. How to test your board We will publish a video in our YouTube channel showing how to test the board and until we do here is a text description of a process that gives you 99% chance of diagnosing the board properly: The board should be tested with nothing else connected to it.Connect it to AC 110V power. There should be 12V DC on CN9101 as indicated on the small table with pinout voltages located nearby on the table.
Using a resistor voltage divider or external 5V DC voltage source sharing ground with the board send +5V DC to pin 14 (PS_ON) on CN9101. With the PS_ON supplied with +5V DC you should be able to measure 390V DC over any of the three large mains capacitors, e. There should also be +24V DC on CN9201/CN9203 (see connector pin allocation printed near the connector itself).
If you miss any of the +12V DC standby voltage or the PFC 390V DC voltage or the +24V DC voltage then the board is likely bad and needs servicing. If it does have those voltages it is 99% certain it is good. While imperfect this is the most fair way we have found over time that addresses the situation of customers returning malfunctioning (for whatever reason, ours or external) or functional boards (problem being elsewhere in the TV) without having to trust either party for deciding who should be paying.The board we receive must be in good physical condition and must not have been tampered with, i. No apparent traces of previous repairs should show. Burned components from natural power failure are OK; mechanical and chemical alternations to the board usually are not (exceptions apply, subject to our decision upon inspection). We reserve the right to reject service to boards that were damaged or tampered with. This item is in the category "Specialty Services\Restoration & Repair\Electronics".
The seller is "coppelltvrepair" and is located in this country: US. This item can be shipped to United States.