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-   -   Soundigital 8K (http://www.diyaudio.com/forums/car-audio/217481-soundigital-8k.html)

brandes.cm 6th August 2012 11:23 PM

Soundigital 8K
 
What is the IC located next to the IR2010's, the number is scratched off. I will post a pic in a bit.

brandes.cm 7th August 2012 08:13 PM

1 Attachment(s)
Photo

I need a resistor value also circled on the pic. Emails sent off to Jose Diaz and others, no reply yet.

brandes.cm 8th August 2012 06:40 PM

Anyone from Brazil that can get any info, reps in the US are non-existent.

brandes.cm 8th August 2012 11:27 PM

HEF4070 is the IC and the resistor is 10ohm .25watt

timwebb 8th August 2012 11:47 PM

i never seen one.... thought it would be kinda bigger for a 8k amp.

brandes.cm 9th August 2012 01:53 AM

Efficient, using a microprocessor for all the pwm signals and IC's for the drive signals. All that is left would be the supply and input circuitry.

brandes.cm 18th September 2012 01:26 AM

The clip light is always on when I have the outputs enabled. If I disable the outputs with the switch clip light goes out until the input signal is increased.

Anyone have thoughts on this amp?

brandes.cm 18th September 2012 02:58 AM

The clip light is figured out, switch was put in the wrong state.

I get very little output of this thing, I can see the carrier with the 40hz on it, but after the filter I get nothing. The inductors are not open, maybe the cap?

Perry Babin 18th September 2012 11:49 AM

Is the pulse width of the PWM signal on the carrier going from near 0% to near 100%?

If not, the problem is the signal driving the input of the class D circuit.

brandes.cm 18th September 2012 05:45 PM

Quote:

Originally Posted by Perry Babin (Post 3169316)
Is the pulse width of the PWM signal on the carrier going from near 0% to near 100%?

If not, the problem is the signal driving the input of the class D circuit.


It doesn't seem to be, the layout of the 3 quad package op-amps has me baffled. A few have a square wave on the outputs while others have a triangle waveform and a few have the sine wave input signal.


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