Try These links 
http://www.marsport.org.uk/smd/mainframe.htm
http://www.elektronik-kompendium.de/service/smdcode.php
http://www.tkb-4u.com/code/smdcode/indexsmdcode.php
Also check for the logo of manufacturer
http://www.chipdocs.com/logos/logotypes.html
http://www.marsport.org.uk/smd/mainframe.htm
http://www.elektronik-kompendium.de/service/smdcode.php
http://www.tkb-4u.com/code/smdcode/indexsmdcode.php
Also check for the logo of manufacturer
http://www.chipdocs.com/logos/logotypes.html
It is one of the amplifier board from the creative labs gigaworks S750 speaker system! The color band on the resistors are red, black, red, gold. I was sent the board to source the defective parts. I am not able to answer the very technical questions. I did try to get info on the parts from creative labs. But, they would not release any technical info on their products. They were more willing to sell me a new speaker system.
You need to understand the circuit around a component if you are measuring it in circuit. The solder tooks untouched so I assume you have measured it in circuit, it may not be faulty at all.
The resistor is a 5% 2k ohm resistor and appears large enough to be a hefty wattage. To get enough current to get a 2k resistor hot you need lots of volts so I think what you have there might be a switched mode power supply or a very powerful amplifier.
If you can figure enough of the circuit to work out what it needs to do you might be able to stick any old diode of X voltage and Y current rating in it's place.
You'll be lucky to positively identify a part with so few numbers on it. Often SMT parts have no markings whatsoever, all of the ID is on the bulk reel they come on. Being a semiconductor that may only be a date code.
The resistor is a 5% 2k ohm resistor and appears large enough to be a hefty wattage. To get enough current to get a 2k resistor hot you need lots of volts so I think what you have there might be a switched mode power supply or a very powerful amplifier.
If you can figure enough of the circuit to work out what it needs to do you might be able to stick any old diode of X voltage and Y current rating in it's place.
You'll be lucky to positively identify a part with so few numbers on it. Often SMT parts have no markings whatsoever, all of the ID is on the bulk reel they come on. Being a semiconductor that may only be a date code.
Most likely the amplifier is not a mono-block. Look at the other channel. You may need to desolder one end to see all of the markings. Depending what it is in the circuit a 1n4007 or a 1n4148 should work in most cases depending on exactly what the diode is being used for. measure the volt drop across it with a meter while you have one end lifted, this can tell you if it's a Schottky or a normal diode.
Diodes used like that are to exploit the volt drop across them, it is to provide a low impedance way to get a 0.7V drop for the bias of the power transistors. The PN junction in the transistors is also about 0.7V
The good news: any old standard diode should work provided the current rating is suitable. (no schottkys/high speed, just a dumb ol diode)
The bad news: usually the diode is killed by a shorted transistor.
while you have the diode tester out look for a shorted Base-emitter or base-collector on one or more transistors.
When powering up for testing use safety resistors, (see elliot sound products webpage for tips)
The good news: any old standard diode should work provided the current rating is suitable. (no schottkys/high speed, just a dumb ol diode)
The bad news: usually the diode is killed by a shorted transistor.
while you have the diode tester out look for a shorted Base-emitter or base-collector on one or more transistors.
When powering up for testing use safety resistors, (see elliot sound products webpage for tips)
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