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DIY soldering on Sony KP-46WT520

sjt1985
08-05-2009, 08:04 AM
I recently picked up this TV from the curb and wanted to plug it in to see if it worked. Well, it didn't turn on, but it does flash the standby light 9 times, then pause, then 9 flashes again. After doing some research, I have found that there are 2 diodes that need to be replaced (and hopefully that will solve the problem). The parts are going to run $15-20.

Has anybody done any soldering on small boards like this? I've recently soldered some new guitar components into an electric guitar, but never worked with anything this small. Any advice or tips?

BANDB
08-05-2009, 02:53 PM
Has anybody done any soldering on small boards like this? I've recently soldered some new guitar components into an electric guitar, but never worked with anything this small. Any advice or tips?
Get a good soldering iron with a pointed tip, some good rosin core solder, and a solder sipper. A hemostat is helpful, too. Melt the solder connection, sip the solder out (a spring loaded sipper works best), and lift the diode out with the hemostat.
I would think that a radio shack will have what you need. Careful with polarity on the diodes.
Good luck!

sjt1985
08-06-2009, 11:47 AM
Get a good soldering iron with a pointed tip, some good rosin core solder, and a solder sipper. A hemostat is helpful, too. Melt the solder connection, sip the solder out (a spring loaded sipper works best), and lift the diode out with the hemostat.
I would think that a radio shack will have what you need. Careful with polarity on the diodes.
Good luck!

Thanks BandB,

Would I be able to re-use the solder that is already in there, or would I have to use new solder? Also, how can I check the polarity of the diode? Some people at work said there is a stripe, but I couldn't believe how small one of the diodes is!

Thanks again!

SJ44
08-06-2009, 09:26 PM
You need fresh solder to resolder, and use a fine point soldering pencil.
Look on the diode already installed for the marking at one end.

sjt1985
08-13-2009, 06:41 AM
Thanks for the help, I was able to replace the diodes, and it fired right up! Pretty nice TV somebody was tossing out only cost me $21 to fix! Anyhow, I need to find an HD tuner now since it's only HD Ready...

BANDB
08-13-2009, 11:36 AM
Thanks for the help, I was able to replace the diodes, and it fired right up! Pretty nice TV somebody was tossing out only cost me $21 to fix! Anyhow, I need to find an HD tuner now since it's only HD Ready...

Congratulations! I worked my way thru college as a TV repairman and found many good TVs this way. All time record was one that needed a 56 part to be like new!