AC servo motor help !

[vre]

The pcb over the rectifiers has some ceramic caps as shown in photos. So its probably better to not modify the pcb.
I will check what these small ceramic caps do...
I think (please correct me if iam wrong) that if you bridge 2 ~ of 1st rectifier (means to bridge L1 with L2) and connect phase/neutral to L1-L2/L3 i think all diodes (8 from 8) used without modifying the pcb.
To understand why this happens see following the image

(In second rectifier the 2 ~ are allready bridged so you must bridge the 2 ~ of first rectifier to make all diodes to work with single phase 230VAC)

I will check with oscilloscope if the smoothing in single phase is ok with default caps and if the driver need more caps for smoothing...

I have tested the servo motor/driver with phase/neutral connected in L1/L2 and L3 unconnected (using only 1 rectifier) and seems to working.
To use 6 diodes from 8 totally with this type of pcb wiring you must connect phase/neutral to L3/L1 or L3/L2 because the in 2nd rectifier
the 2 ~ legs are bridged. With phase/neutral to L1/L2 only 4 diodes of 8 used.

I have understand what missing components do. They are very cheap and i can't undestand why the manufacturer did not added them to give rs232/485 communication port.
The question is if LCMXO640C-3TN144C chip supports rs232/485...
Iam not having schematic for missing components but i found what they do.
U22 is a max232 ic (for rs232) and u35 is a sp485 ic (for rs485) 6 pin cn1 connector is a mini 6pin din ( PS/2 ) connector witch provides rs232 & rs485 connection.
I have downloaded the datasheets of these ics (show in example circuits adjacent components values) and followed the traces in pcb and from that i read in manual you send me i beleive that i would find the extra smd resistors/caps/choke coils/diodes.
I have already ordered from ebay max232 & sp485 also i have oscilloscope & some spare smd resistors/caps/chokes/diodes so i would try
to add in this servo driver serial communication port.
The is no risk to burn some critical because D11 & D12 missing diodes is for protecting the LCMXO640C-3TN144C chip.