[sdiy] Siel PX

[Jason Zastrow]

Hello,
        I recently purchased a siel px piano from somebody on e-bay and I don't think that it's working properly. Has anybody heard of this model? I searched the internet up and down and I couldn't find ANYTHING at all about this keyboard. 

The chorus button seems to give little, if any effect on the sounds. Sometimes when it is depressed, six or seven of the preset LEDs will light dimly, along with the preset that I have chosen. I was wondering if it could be a problem with the power supply. 

Another problem with the unit is that with most of the presets except for about two or three, the keyboard seems to be one third a "rhodes" type sound, the middle being a raspy "loose tine" rhodes and the last third is the same sound as the first third. I notice that there are three boards on the inside of the piano, one labeled low, middle and high. Each of these boards has two Texas Instrument chips labeled "TMS3617NS", except for one board which looks like one has been replaced with a "TMX3617ANS", I'm assuming that both are probably simlar. These chips are in sockets, this could mean that they have a chance of failing. I'm not sure what these do, though. 

It seems as if the presets just aren't working right. I don't know what's wrong with it. Maybe it could be those TI chips? 

Would it be worth it to take this piano to a repair tech? Would it be difficult to find parts for it?

Looking inside of this thing is a far cry from the insides of my Crumar Performer and Elka Rhapsody. I'm somewhat confused, and I'd like to get this thing running.

Any help and suggestions would be most appreciated.

Sincerely,
Jason Zastrow
Rockford, IL USA
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