stetsom 1k5 h

megael9 · 25th July 2011, 04:30 AM

Im working with this baby amp, the driver ic was burt out,
there are 2 diodes, one under the ic socket, and the
other just next to the socket, both of this diodes went
bad, I replace all 3 components and the amp came on normally.
the output valtage was .0 v, but after about
40 seconds with just the power on, the ic burt out, and the diode
on the side of the amp, went bad. replace all 3 components
againg, but now all 3 leds are on. all components near the ic
measure ok.

megael9 · 25th July 2011, 04:41 AM

one more thin, the audio out mosfet that came with the
amp are 1a41ah, and the ones I got from stetsom are 1a44ah.
this amp came from an electronic shop, I think this mosfet
ware replaced before. can that be the cause of my problem?

Perry Babin · 25th July 2011, 05:15 AM

Confirm that the 5v regulator feeding the PIC controller is within tolerance.

megael9 · 25th July 2011, 02:46 PM

regulator have 5.1v

fcruz · 25th July 2011, 05:01 PM

FETs are the original irfb4127

fcruz · 25th July 2011, 05:21 PM

check the zener diodes of d4 and d7 5v6

megael9 · 25th July 2011, 06:48 PM

d4 is shoted, and is lavel BZX 55C 15.
Do you know the value of d4?
thanks in advance.

fcruz · 25th July 2011, 06:55 PM

d4- 5v6

ejds · 26th July 2011, 01:03 AM

Hi there!

25th July 2011, 04:30 AM	#1
megael9 diyAudio Member Join Date: Oct 2009	stetsom 1k5 h Im working with this baby amp, the driver ic was burt out, there are 2 diodes, one under the ic socket, and the other just next to the socket, both of this diodes went bad, I replace all 3 components and the amp came on normally. the output valtage was .0 v, but after about 40 seconds with just the power on, the ic burt out, and the diode on the side of the amp, went bad. replace all 3 components againg, but now all 3 leds are on. all components near the ic measure ok. __________________ fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.

25th July 2011, 04:41 AM	#2
megael9 diyAudio Member Join Date: Oct 2009	one more thin, the audio out mosfet that came with the amp are 1a41ah, and the ones I got from stetsom are 1a44ah. this amp came from an electronic shop, I think this mosfet ware replaced before. can that be the cause of my problem? __________________ fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.

25th July 2011, 05:15 AM	#3
Perry Babin diyAudio Member Join Date: Nov 2003 Location: Louisiana	Confirm that the 5v regulator feeding the PIC controller is within tolerance. __________________ Links >> Basic Car Audio Amp Repair --- Basic Car Audio Electronics --- Basic Transistor Testing --- Basic Switching Power Supply Design --- Basic Computer Skills << Links

25th July 2011, 02:46 PM	#4
megael9 diyAudio Member Join Date: Oct 2009	regulator have 5.1v __________________ fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.

25th July 2011, 06:48 PM	#7
megael9 diyAudio Member Join Date: Oct 2009	d4 is shoted, and is lavel BZX 55C 15. Do you know the value of d4? thanks in advance. __________________ fluke 50 mhz scope,35 amp power supply,0.5-12v adj power supply, fluke 179,hot air desolder gun, merit multyfuntion signal tracer/generator.


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25th July 2011, 05:01 PM	#5
fcruz diyAudio Member Join Date: Apr 2011	FETs are the original irfb4127

25th July 2011, 05:21 PM	#6
fcruz diyAudio Member Join Date: Apr 2011	check the zener diodes of d4 and d7 5v6

25th July 2011, 06:55 PM	#8
fcruz diyAudio Member Join Date: Apr 2011	d4- 5v6

26th July 2011, 01:03 AM	#9
ejds diyAudio Member Join Date: Aug 2010 Location: Sao paulo	Hi there!

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