How to diagnose transformer failure or expected output
Could be the transformer.  The circuit works this way:  when DMMP is high, Q10-C is pulled low, disabling the power supply.  When DMMP is low, Q10-C should be high and is no longer part of the circuit.  To troubleshoot, remove Q10 and the oscillator network containing Q9 should run, giving the desired outputs.  R41 pulls up the base and turns Q9 (NPN, not a PNP) which should then provide a negative voltage pulse on T1-1, turning off Q9 and starting the oscillator.  From your measurements, Q9 may be blown, but that could be a secondary failure to the transformer if it is bad.