Search found 3 matches

by daveben
Sat Nov 07, 2015 10:49 am
Forum: Korg Pa2XPro - Pa800 - Pa500
Topic: PA800 distortion and RAM
Replies: 9
Views: 17439

Antony Sharman you are a hero! I have fixed the faulty resistor pack and keybaord has now been playing distortion free for several days. I haven't yet sourced and fitted a suitable fan, that is my next task, but I wanted to say thanks for pointing me to the problem. I never would have thought of ...
by daveben
Sun Oct 25, 2015 2:33 pm
Forum: Korg Pa2XPro - Pa800 - Pa500
Topic: PA800 distortion and RAM
Replies: 9
Views: 17439

Hi Antony Sharmman, I had just about given up on this keyboard but, prompted by your post, today I have spent a couple of hours and measured every resistor pack used in the various data and addresses busses and guess what? I have found 1 resistor in 1 pack which reads 500R but should be 47R! This is ...
by daveben
Wed Sep 09, 2015 6:38 pm
Forum: Korg Pa2XPro - Pa800 - Pa500
Topic: PA800 distortion and RAM
Replies: 9
Views: 17439

PA800 distortion and RAM

Hi, I am an electronics engineer attempting to repair a PA800 which has intermittently distorted sound on both headphones and speakers. This forum has led be to believe the RAM is often the culprit for this problem. It certainly sounds like a digital problem as there is all sorts of noise and ...

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