help please, 6 ch car audio amp

klevi · 25th April 2011, 08:15 PM

HI TO ALL.
I HAVE THIS CAR AMPLIFIER THAT A FRIEND GIVE TO ME.
I DONT KNOW THE BRAND OR ANOTHER DETAIL.
I SEARCH ON THE INTERNET BUT NOTHINK.
ITS 6 CH -HI,MID,LOW.
MY BROTHER WAS TRYING (I DONT KNOW WHAT) AND HE
CONNECT THE HI OUTPUT OF THE CAR STEREO DIRECTLY TO
THE PREAMP (I THINK)
AND NOW THE NORMAL INPUT IS NOT OK.
I MEAN I CONNECT THE THE AMP FROM THE OUTPUT STEREO AMP
BUT NO AUDIO IS COMMING FROM THE AMP.
I THINK THAT I BURNOUT THE ""KIA 4559 S "" BECAUSE THEY ARE
THE FIRST INPUT IC BEFORE TRANSISTORS AND I HAVE TRY
THE TRANSISTORS AND ARE OK I THINK.
IF ANY ONE KNOW HOW TO TEST THE KIA4559S PLEASE ADVICE ME.
PLEASE IF SOME BODY HAVE ANY IDEA HELP ME.

ps: i have write another one in wrong section.

tinitus · 25th April 2011, 08:21 PM

klevi, please use small 'letters'

moderation

Perry Babin · 25th April 2011, 08:31 PM

Did you remove all of the 4559s?

klevi · 25th April 2011, 08:53 PM

sorry for the (capital).
yes i remove all, and 1 of them is not like others when i test it with diod test.
i dont have one ic (4559s) good to compare the others.

Perry Babin · 25th April 2011, 09:06 PM

It's unlikely that you have more than one defective. If you found a way to compare them and one was different, it's likely defective (assuming that it's from the same manufacturer). In general, the best way to test op-amps is in the circuit.

klevi · 25th April 2011, 09:27 PM

so, we have the 4558s dual side A and B in 9 pin.

Perry Babin · 25th April 2011, 10:30 PM

Is this a question or a statement?

klevi · 25th April 2011, 10:31 PM

so, we have a kia 4558s dual side A snd B,

so your idea is that is unlike that i burnout more than 1 ic???
but "i" try on all low input the hi stereo output and i think that are all burn, this explain the fact that is no diference betwen -IN and +IN in both side and in all 10 circuits all the same and same manuf.
regards

klevi · 25th April 2011, 10:34 PM

Quote:

Originally Posted by Perry Babin

Is this a question or a statement?

no i put a picture but is not here

.
i repost

Perry Babin · 25th April 2011, 10:37 PM

Maybe the amp has a problem that affects all of the channels. Is it producing rail voltage?

Is it producing regulated ±15v on pins 5 and 9 of the op-amps?

25th April 2011, 08:31 PM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Did you remove all of the 4559s? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th April 2011, 09:06 PM	#5
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	It's unlikely that you have more than one defective. If you found a way to compare them and one was different, it's likely defective (assuming that it's from the same manufacturer). In general, the best way to test op-amps is in the circuit. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th April 2011, 10:30 PM	#7
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Is this a question or a statement? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th April 2011, 10:37 PM	#10
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Maybe the amp has a problem that affects all of the channels. Is it producing rail voltage? Is it producing regulated ±15v on pins 5 and 9 of the op-amps? __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

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25th April 2011, 08:21 PM	#2
tinitus diyAudio Moderator Join Date: Nov 2005	klevi, please use small 'letters' moderation

25th April 2011, 08:53 PM	#4
klevi diyAudio Member Join Date: Apr 2011	sorry for the (capital). yes i remove all, and 1 of them is not like others when i test it with diod test. i dont have one ic (4559s) good to compare the others.

25th April 2011, 09:27 PM	#6
klevi diyAudio Member Join Date: Apr 2011	so, we have the 4558s dual side A and B in 9 pin.

25th April 2011, 10:31 PM	#8
klevi diyAudio Member Join Date: Apr 2011	so, we have a kia 4558s dual side A snd B, so your idea is that is unlike that i burnout more than 1 ic??? but "i" try on all low input the hi stereo output and i think that are all burn, this explain the fact that is no diference betwen -IN and +IN in both side and in all 10 circuits all the same and same manuf. regards

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