[Madcat05]

Ok so my pimeta has been working fine for the last couple days. Today I got a new ad8620, I put it in to test and when I turned the power on, the amp doesn't turn on.

The led isn't lit. I've tried a new switch with no luck. I've checked my solder points and appear to be the same as they were.

anyone have some ideas as to what the problem is?

EDIT. I also desoldered the switch and left rca jack to see if they fit my case. That was the last thing changed to the amp.

 

[Madcat05]

I just measured the voltages of each battery with the amp on and the amp is recieving power. When I tried the amp earlier there was no sound.

I'll try the amp again later.

 

[tangent]

Quote:

I put it in to test and when I turned the power on, the amp doesn't turn on.

Did you put it in in the right direction? There is a square pad on the adapter that is pin 1. The text on the chip will be upside down when the notch on the socket is upward and the chip is inserted correctly.

 

[Madcat05]

It's in the right way.

 

[tangent]

What happens when you replace the previous chip?

 

[Madcat05]

I put a TL082 in and the amp's led still isn't lit.

Last night I was finishing up the case, and I had to place the board in the case a few times with the components hooked up. I had to bend back some of the wires a few times as they are a tad long. Could that have affected anything.

I really think a wire must be loose. But the amp is getting power.

 

[Madcat05]

bump

 

[tangent]

New troubleshooting article

 

[Madcat05]

I tired measuring from the PG pad to the input jacks but I get 0.

 

[tangent]

So the jacks are broken or the source is. Or the interconnect cable, I suppose.

Change these three one at a time until something fixes it. I'd start with the jacks, since you say you were messing with them.

 

[Madcat05]

What would explain the LED not being lit?

My source is fine I just tried it. I'll try the interconnect now since I don't have any more rca jacks right now.

 

[PeterR]

Quote:

Originally Posted by Madcat05 I tired measuring from the PG pad to the input jacks but I get 0.

Sorry for asking, but "0" what? What was your meter set to?
I suppose you've checked that there is voltage reaching the chip's supply pins (as suggested in tangent's article)?

 

[Madcat05]

The 0 was on the Voltage scale.

I just measured from PG to all the pins on the Ad8620 and I get 0V.

 

[PeterR]

Quote:

Originally Posted by Madcat05 The 0 was on the Voltage scale.

AC or DC ? (

)

Quote:

I just measured from PG to all the pins on the Ad8620 and I get 0V.

So there's no power reaching the chip? Start from the battery and check voltages along the supply path...

 

[Madcat05]

I'm pretty sure it was AC. On my meter I used the scale with the capital A with a line and two dots above it.

I've measured from the pads where the battery straps are soldered and I get about 8.75V on each pad which is about 18V. And I'm using two 9v batterys.