Electronics > Repair
Repair attempt TC-Electronic Nova System: DSP Audio (guitar)
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Zucca:
1) Did you check how many Ampere the board is sucking up?
2) Can you desolder the chips suspected brocken? You should than check how the current at the power supply will than change.
obiwanjacobi:
No I only measured the supply voltages. Because two chips were getting really hot, I did not bother to look further.

I am (still) not sure if I am willing to cough up the money for the new chips. But your suggestion is a good one and I can do that before buying anything.

Thanx!
nilton:
A bit off topic maybe but I am planning to get a Nova system and modify it for 4-cable method. From your pictures i can make a qualified guess that the drive unit is on a separate board. Is that so? and could you take some pictures of that maybe since you have already disassembled it?
obiwanjacobi:
That sounds like an interesting mod. I would be interested in hearing the details. There is enough room to drill holes for 1 or 2 more jack connectors.

It is correct that the drive input comes in on its separate board and -I haven't decoded the chips there- I suspect it does contain the drive circuit. The tc site boasts with having an analog drive circuit - so.

The white 'cable'/connector on the right goes to the main board and comes in near some analog multiplexers -if I remember correctly. The (empty) connector on the bottom left comes from the top board that contains the display and buttons. No idea what that is for to be honest.

Drive input board.


Here's an overview shot. The main board on the bottom is normally positioned on top of the power supply (left) and the drive board (right).


Hope it helps.
Marc
obiwanjacobi:
Oh and I have measured the current for the +3.3V and +5V rails:

With faulty chips on Main Board:

+3.3V   0,227A
+5V      0,145A

Not blazingly high to my surprise...

I have successfully removed the DSP package with hot air and am now turning my attention to the Audio Receiver chip. After that I think I also remove the ADC/DAC chip and measure current again - to see what the difference is.
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