Hi!!!
I am experiencing pretty much the same problem with a nsx-v70 or CX-NV70.
The schematic has the same philosophy with the above and I took some measurements.
FIL1, FIL2 were at the correct value with 5,5V ac.
On Q102 on emitter I measured -28,9V which is close to -28,8V.
On Q112 on...