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SL1600mk2 Pitch Control LED Repair

wiztstar said:
I replaced IC427; it did not fix the problem. It isn't any worse, just not fixed.
Click to expand...

Sounds like we are in the same boat. Everything works correctly except the diodes only show centered speed or max -.

Tracks back to the motor board where there is a chip in common with the control board, but I haven’t changed it out because I wasn’t sure if it was the problem or not.
 
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JJCalvillo said:
Sounds like we are in the same boat. Everything works correctly except the diodes only show centered speed or max -.

Tracks back to the motor board where there is a chip in common with the control board, but I haven’t changed it out because I wasn’t sure if it was the problem or not.
Click to expand...
I’m going to change IC426 and see what happens.

UPDATE: There is an adjustment for the pitch LEDs, VR425. I sprayed the trimmer with tech cleaner and made the adjustment while moving the pitch knob back and forth and that solved the problem.

So the solution is to change IC427 and then make the adjustment.
 
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