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Use the neg end of bridge for ground. It looks like they used cold ground
for the voltages !
R601 just to limit inrush current while big filter cap charges.
First be sure there are no shorts on the 3 secondaries The
120 V is most likely.
R602 & R607 give IC a kick start. If you dont get neg feedback to
that pin IC will blow. Open resistors will give "dead set"
R609 & R628 are the low end ( E ) of the IC's output. Over current will be seen here if a short on chassis & shut down the IC.
If IC isnt blowing you can monitor to see if IC is trying to start etc.
Unplug the DGS coil so it wont confuse you. Let us know how you do !
good luck
Zeno
LFOD !
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