Spica 429P PQC-U troubles

I have a Spica whose ink keys rotate from one direction to the other for no reason. When I do a 0-Set, the digits of the dimm boards (like a drop in current) and my ink keys do not lock, the digits return to 0 but the ink keys remain at their last adjustments. I reset my ink keys to 0 (with the board off) manually and as soon as I reopen the digits of the board to look at the digits, several flashes occur, then I click Off twice to stop flashing but some ink keys go scared of 'one way or the other. A kind of communication bug between the PQC-U and the board controls!

 

Hi sir:

Please do this:

1) Measure +15Vdc if if o.k, or if Higher up or down from 0.7%

1a) Replace the failing S2FT, S2FTB, S2FK5, or S2FK7 PCB.

2) Replace the S2FM PCB.

 

Ok the 15Vdc is at 15.86, i should replace all the cards inside the board?

 

First replace, + 15 VDC .
2) test with the new Power Supply

3) only if after replace,the new Power Supply, if the problem persist, replace it.

Blessing