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Amp repair advice

I have Sony Xplod Amplifier XM-SD51X - Class D 1100W Mono Amplifier the surface mounted resistors burned up along with the chips I replaced the chips but don’t know what to replace the surface mounted resistors with can I use the color code resistors if so what color codes should I use?

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Check on the board to see if there is a resistor that looks similar, 90% of amps amps are matched in there design, meaning the left side is usally a carbon copy of the right, so if you look at one side and there is a resistor that looks like it's in the same spot on the other side, good chance thats the same one, read the colors off the one thats not burnt up. resistors come in different wattages,1/8,1/4 1/2 up to 10 watts, each wattage is a different size, most of the ones you see in the amp are 1/4 watt but some are 1/2 and 1/8. some on the output are 2 to 5 watt, but those are generally 10-18 mm in length, they are big ones you cant miss those. so once you get the color code, read the colors, ex red,gree,brown,last line is either silver or gold, that will tell you the resitor value. then google resistor color codes and then you can match the color sequence with the value codes, and that will tell you the value you need in ohms but then you have to get the size 1/4 watt resistors are generally about 6 mm in legnth, im measuring the actual part of the resistor not including the metal leads, just the body, so if its larger its probally a 1/2 watt if smaller its an 1/8 watt, 1/8 watt are about 4 mm. now go buy the resistor, but you might find it that tough, if its a common value radio shack might have it, but resistors are so cheap, pennies for a handful, good luck on your search.

Posted on Jul 01, 2009

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