AKAI S1100 INVERTER MOD: SUCCESS
My S1100 inverter was very loud (hight pitch buzzing noise) so here's what i did to solve the problem. Perhaps it could help or inspire someone else so i took pictures during the whole project. As safety precautions, don't forget to unplug the machine BEFORE you work in/on it.
1) Troubleshoot: I made sure there was no noise coming out of the audio (this would indicate a problem coming from the capacitor on the inverter circuit). Tested with headphones, zero noise.
2) I bought from MisterWhite: a brand new backlight for my S1100 (can sometimes help with the inverter noise but in my case, it didn't) and i also bought a brand new display for my S950. With those displays, you don't need the inverter anymore so once installed, i was left with a spare S950 inverter (wich was 110% quiet).
3) Here's the S1100 inverter on its circuit board:
Here's the S950 inverter on its circuit board:
4) Here's what you'll need to make this mod a success:
a) Soldering station/iron
b) S950 inverter
c) S1100 circuit board
d) 3 x 3'' wires (i used solid core)
e) Heatshrink material
f) Solder
g) Desoldering pump
e) Love and respect for old samplers
5) I started by soldering the 3 wires to the 3 feets of the S950 inverter.
6) I then heated the heatshink material in place.
7) Then i soldered the other end of the 3 wires to the S1100 circuit board.
8 ) To help me out, MisterWhite provided me with this nice drawing:
9) Now all that was left to do was to put the circuit board + inverter back into my S1100 using sticky velcro (so it can be removed if needed). I added electrical tape on the inverter connectors for extra safety.
10) Close the chassis, put the screws back on, plug the sampler and your all done, success ! Zero noise.
Special thanks to you Matt for your top quality products and your top-notch after market service.