Discussion about the Korg PolySix synthesizer

Further to my recent question about warming up time. Anyone know 
what is the chip that is affected by the warming up, (or does this 
depend on what problem someone might be having).
 My P6 takes a good few hours (at least 2) to warm up. I get sound 
out of it straight away, but I can't get any editing done. In the 
first couple of hours, the VCF and EG sections do nothing. They do 
respond once it's warmed up, but can't do anything until then. (when 
I say they respond, the cutoff and res make a different tonal 
change, but I wouldn't say they were working to their full ranges.)
So, I'm thinking, is there any chip (or chips) I can replace to help 
remedy this.
I had to change a SSM2056 recently, I'm wondering should I have 
changed all 6 at the same time. (The 6 that were in it, all had a 
number on (other than the 2056), that were the same, now 5 are the 
same and one is different (obviously the replaced chip), does this 
make much difference.

Finally, I have to ask again, coz I didn't get much response last 
time, is there anyway this can be calibrated or re-initialized if 
serviced.

Thanks if anyone can help....   Rob