HELP! My remote volume control stopped working! :(

paulspencer · 14th October 2006, 01:24 AM

I built this kit from Altronics and it worked fine for about half an hour, then just stopped, the lights to indicate a signal received don't operate.

http://www.altronics.com.au/index.as...=item&id=K5026

I know my mistake, but don't know how to fix it. It requires 12 - 15V and by wiring the power supply incorrectly, I was feeding it 30V! Oooops!

Looking at the board, there are no signs of damage. I have taken my multimeter and tried to find any obvious signs of components that are fried, by measuring the resistance across all the resistors, and the motor itself. I can't find anything.

Can anyone suggest how I might find the problem and fix it?

Edit:

Here are the images:

XEAGLEKEEPER · 14th October 2006, 01:41 AM

My best guess is the controller chips are

XEAGLEKEEPER · 14th October 2006, 01:47 AM

maybe just the regulator . Does anything work ie LED's......

paulspencer · 14th October 2006, 01:47 AM

How would I determine this? I don't want to randomly buy and replace parts as I could spend the cost of the kit and not fix it. Or maybe even damage parts in the process.

LEDs don't light up now, however whether they still work is another thing. Can I test them with a multimeter?

Tube_Dude · 14th October 2006, 01:55 AM

Inspect if you have 5 Volts at the output of the regulator and also inspect the 100 uF capacitor at the input of the regulator , this capacitor has only 25 volts ratings and can be destroyed by the 30 Volts input voltage...

XEAGLEKEEPER · 14th October 2006, 01:57 AM

Did your 30 volt supply blow a fuse ? I'd also take a good look at the input elect cap it was only rated for 25 vdc.

XEAGLEKEEPER · 14th October 2006, 02:02 AM

5 volts at output of regulator with the proper voltage applied

paulspencer · 14th October 2006, 02:08 AM

There are no fuses to blow. The power supply comes from an ESP preamp power supply.

Regarding checking caps, is it sufficient to just measure capacitance with my DMM?

Tube_Dude · 14th October 2006, 02:14 AM

Put a 200 Ohms resistor for protection and to bring the input voltage down ,in series with the positive input of the regulator and inspect the voltages first...

XEAGLEKEEPER · 14th October 2006, 02:16 AM

Does it appear to have gotten warm or hot ie shrunken plastic or bulged or expanded about allyou can tell is if it is shorted or not .

14th October 2006, 01:24 AM	#1
paulspencer diyAudio Member Join Date: Sep 2003 Location: Melbourne, Australia	HELP! My remote volume control stopped working! :( I built this kit from Altronics and it worked fine for about half an hour, then just stopped, the lights to indicate a signal received don't operate. http://www.altronics.com.au/index.as...=item&id=K5026 I know my mistake, but don't know how to fix it. It requires 12 - 15V and by wiring the power supply incorrectly, I was feeding it 30V! Oooops! Looking at the board, there are no signs of damage. I have taken my multimeter and tried to find any obvious signs of components that are fried, by measuring the resistance across all the resistors, and the motor itself. I can't find anything. Can anyone suggest how I might find the problem and fix it? Edit: Here are the images: __________________ AUDIO BLOG \| Bass integration guide My work: www.redspade.com.au web design studio

14th October 2006, 01:41 AM	#2
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	My best guess is the controller chips are __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

14th October 2006, 01:47 AM	#3
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	maybe just the regulator . Does anything work ie LED's...... __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

14th October 2006, 01:47 AM	#4
paulspencer diyAudio Member Join Date: Sep 2003 Location: Melbourne, Australia	How would I determine this? I don't want to randomly buy and replace parts as I could spend the cost of the kit and not fix it. Or maybe even damage parts in the process. LEDs don't light up now, however whether they still work is another thing. Can I test them with a multimeter? __________________ AUDIO BLOG \| Bass integration guide My work: www.redspade.com.au web design studio

14th October 2006, 01:55 AM	#5
Tube_Dude diyAudio Member Join Date: Mar 2002 Location: Aveiro-Portugal	Inspect if you have 5 Volts at the output of the regulator and also inspect the 100 uF capacitor at the input of the regulator , this capacitor has only 25 volts ratings and can be destroyed by the 30 Volts input voltage... __________________ Jorge


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14th October 2006, 01:57 AM	#6
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	Did your 30 volt supply blow a fuse ? I'd also take a good look at the input elect cap it was only rated for 25 vdc. __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

14th October 2006, 02:02 AM	#7
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	5 volts at output of regulator with the proper voltage applied __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

14th October 2006, 02:08 AM	#8
paulspencer diyAudio Member Join Date: Sep 2003 Location: Melbourne, Australia	There are no fuses to blow. The power supply comes from an ESP preamp power supply. Regarding checking caps, is it sufficient to just measure capacitance with my DMM? __________________ AUDIO BLOG \| Bass integration guide My work: www.redspade.com.au web design studio

14th October 2006, 02:14 AM	#9
Tube_Dude diyAudio Member Join Date: Mar 2002 Location: Aveiro-Portugal	Put a 200 Ohms resistor for protection and to bring the input voltage down ,in series with the positive input of the regulator and inspect the voltages first... __________________ Jorge

14th October 2006, 02:16 AM	#10
XEAGLEKEEPER diyAudio Member Join Date: Jan 2006 Location: central Iowa	Does it appear to have gotten warm or hot ie shrunken plastic or bulged or expanded about allyou can tell is if it is shorted or not . __________________ Ret. USAF... AKA- Avionic * Solder slinger for hire...*

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