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Old 18th March 2007, 05:10 PM   #1
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Default Problem with STK401-130

HI all
i've a proble with STK401-130
the problem are:
when i make the pcb as shown in datasheet i found it have some error (short circuit) between +ve and -ve pins
there are some different between the schematic and pcb in this datasheet so i don't know who is right schematic or pcb
at any way when i make the pcb it fails
and when i make a new pcb from the schematic the amp work good with good sound but
R9 and R5 have been burned due to very high heat
i don't know why
then the IC it self burned
so can any one help me in this problem or can suggest any circuit compatible with this IC
THANKS
this is the datasheet for IC
http://www.egytronics.agff.net/upcenter/stk401-130.pdf
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Old 19th March 2007, 10:12 AM   #2
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PLEASE I NEED A HELP
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Old 19th March 2007, 11:47 AM   #3
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Can you point us to the difference between PCB and schematic?

/Hugo
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Old 19th March 2007, 04:12 PM   #4
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one of the different
pin10 ,11 in schematic are not connectd but in yhe pcb are connected
pin 12 are not connected in pcb but connected in schematics
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Old 19th March 2007, 04:31 PM   #5
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Pin 10 and 11 are not connected inside the IC so it doesn’t matter if they are connected on the PCB trace or not. No worries here.
Pin 12 should go to the –ve trace. I accentuated the trace, see if it matches your design.

/Hugo
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Old 20th March 2007, 12:27 PM   #6
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ok,
but why R9 and R5 have been burned due to very high heat?
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Old 20th March 2007, 12:33 PM   #7
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Most likely, when the chip went up in smoke, it took R9 and R5 along with him.

/Hugo
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Old 20th March 2007, 01:02 PM   #8
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It might also be that the wattage you used is inadequate. Try a few watts for these R's.

-=Hugo=-
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Old 20th March 2007, 02:18 PM   #9
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ok i'll try then give u a result
thanks for your help
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Old 21st March 2007, 10:22 AM   #10
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the problem is still
after replaced the resistor with other one 7watt
the resistor was heated
then burned
i don't know why?
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