stk 463

nbcd · 2nd November 2004, 09:26 AM

hy all , i just want to ask which are the signal input pins into these circuits. can you tell me please.Thanks. I foung a link where you can find a datasheet of it.
http://www.alldatasheet.co.kr/datash...57.html:smash:

soundNERD · 2nd November 2004, 10:44 PM

according to the datasheet, its pin 1 and 2

nbcd · 3rd November 2004, 07:05 AM

soundNERD:
cool site you got there! , i found some interesting schematics.

I want to ask you something. I got this SHARP stereo amp that uses STK 463 as a final chip amp. The thing is that one channel is working fine but when i plug the speaker to the other i hear a brum sound - something like when a transformer is making that 50Hz sound. If the input signal rises much i can here some vague noises (secialy when the bass rises)- but the sounds arent clean. I don't think the stk is burned because at full load he gets 3.2 Ampers and i have 2A fuses.
What do you supose it has , and what to do to check it out
Best regards!

soundNERD · 3rd November 2004, 12:50 PM

Thanks for the comment!

Depending on if the amp is inverting or non-inverting, you can try connecting an input sound directly to the amp input. How I'd do it is take a portable cd player, put it on minimum, and use a cable that turns the stero plug into 3 wires. Touch the ground wire (usually bare) to the ground connection of the amp, and touch the output directly to either pin 1 or 2, depending on the amp configuration.

If that works, there is probably a short or bad solder connection between the input jack, the volume control and the amp. Check for that.

If it doesn't work, then I am thinking your chip is probably fried.

2nd November 2004, 09:26 AM	#1
nbcd diyAudio Member Join Date: Apr 2003 Location: suceava	stk 463 hy all , i just want to ask which are the signal input pins into these circuits. can you tell me please.Thanks. I foung a link where you can find a datasheet of it. http://www.alldatasheet.co.kr/datash...57.html:smash: __________________ eugen

3rd November 2004, 07:05 AM	#3
nbcd diyAudio Member Join Date: Apr 2003 Location: suceava	soundNERD: cool site you got there! , i found some interesting schematics. I want to ask you something. I got this SHARP stereo amp that uses STK 463 as a final chip amp. The thing is that one channel is working fine but when i plug the speaker to the other i hear a brum sound - something like when a transformer is making that 50Hz sound. If the input signal rises much i can here some vague noises (secialy when the bass rises)- but the sounds arent clean. I don't think the stk is burned because at full load he gets 3.2 Ampers and i have 2A fuses. What do you supose it has , and what to do to check it out Best regards! __________________ eugen

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2nd November 2004, 10:44 PM	#2
soundNERD diyAudio Member Join Date: Sep 2003 Location: Illinois	according to the datasheet, its pin 1 and 2

3rd November 2004, 12:50 PM	#4
soundNERD diyAudio Member Join Date: Sep 2003 Location: Illinois	Thanks for the comment! Depending on if the amp is inverting or non-inverting, you can try connecting an input sound directly to the amp input. How I'd do it is take a portable cd player, put it on minimum, and use a cable that turns the stero plug into 3 wires. Touch the ground wire (usually bare) to the ground connection of the amp, and touch the output directly to either pin 1 or 2, depending on the amp configuration. If that works, there is probably a short or bad solder connection between the input jack, the volume control and the amp. Check for that. If it doesn't work, then I am thinking your chip is probably fried.