How easy is sony kp-43ht20 converge ic chip replacement?
Easy is not a good description... due to the cabinet size of this model, there is not much room to work. You will need to disconnect a lot and unfasten a lot of wires so that you can pull the chassis out of the lower cabinet. Then you will need to remove the D board screws and the Convergence amplifier screws (the amp will be right in your face, you can;t miss them... 2 large heat sinks right in a row. After you do that, you will probably need to change 1 of the 2 fuse links on the G board (the board the power cord plugs into). These are the supply Vcc for the convergence amps. They are 5A fuse links located on the upper/mid, right side on the PCB. Use caution, you need to discharge the circuit before you place the fuse in or you may pop the new (or remaining old) fuse. it's best to use a 100 ohm resistor to bleed the circuit on the input side of the fuse. You can do this by touching a legs of the resistor to the fuses legs. To be sure, just do it on both sides of the fuses. (resistor touch to fuse 1, side 1... and also to fuse 2, side 1. Repeat on other side of fuses.) Bleed for at least 5 seconds. After that, change the fuse(s), put it back together, power it up... press the Flash Focus button on the front of the TV. It you need to do further convergence, you can find information all over the place... or post it here.
Mar 13, 2010 |
Sony KP-43HT20 43" Rear Projection...