Pin identification of transistor and transformer from photo of module
? how can one reason-out the E, B, and C... and the coil pairing of transformer?


123 = BCE

1st locate rectifed DC(-)  on (7). let's call this gnd. (i.e. 0V)
2nd Pin (1) is connected to 30k (304) and diode to gnd
  for BASE reverse clamp.  (which also comes from C then 33//33 then (5)
3rd (3) goes to 10R0//10R0 which is emitter needed to raise input Z and limit current.   

( thus (2) is Collector to (6)  with (4)to storage cap (-).

thus 







simulate this circuit &ndash; Schematic created using CircuitLab

only specific parts shown

Since oscillators require positive feedback the Base to Collector is opposing dots with B to C inverting to complete the loop.