Prob with DOD FX-7 Effects - diyAudio
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Old 22nd November 2004, 04:15 PM   #1
mpm32 is offline mpm32  United States
diyAudio Member
Join Date: Dec 2003
Location: New England
Default Prob with DOD FX-7 Effects

Hi, I have a DOD FX-7 multi effects unit that worked when I put it away a while ago. When I recently pulled it out, I was missing the power cord. I ordered one from PE, it called for 9V @ 500mA. The reason I like this unit is it has a headphone jack.

I don't get any sound anymore out of unit. It works as far as the leds and parameter changes are concerned but nothing out of the headphones.

I thought that it might be the power supply so I measured the voltage and got 14+volts.

I then tried a 9v battery, which I thought would work and get the same result.

Took the unit apart and all jacks and solder points are fine.

Tried many different guitars and cables with the same result. Also changed headphones.

Any suggestions?
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Old 22nd November 2004, 10:23 PM   #2
moamps is offline moamps  Croatia
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Join Date: Oct 2002
Location: Croatia

Adapter should be 9V/500mA AC, not DC.

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Old 23rd November 2004, 01:57 AM   #3
Enzo is offline Enzo  United States
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Join Date: Sep 2004
Location: Lansing, Michigan
I agree. You have th epositive voltages the computer section runs on, but by not having AC power, you are missing half the analog voltages so nothing comes out.

I run a repair shop and I can count on a portion of those units that come in with "no sound" as the complaint having the wrong power adaptor as the cause.
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Old 23rd November 2004, 12:01 PM   #4
mpm32 is offline mpm32  United States
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Join Date: Dec 2003
Location: New England
Ah, I knew it had to be something simple like that.

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