From time to time my 668 PSU shuts down the -+15v rails
when many faders need to move to a new value for ex jumping between different mixes etc-
Also when doing the Wave test program it shuts down the two 15v rails
so PSU has to be restarted.
Could it be that the additional circuit for shutting down the two 15v rails are too sensitive?
There are two jumpers (LK3-4) that could be removed for bypassing the function
but don't know how safe that is.
Other than that all faders and motors works perfect.
Attached are the schematic and PSU information
