FET47 Clone Repair Advice - Possibly Phantom Power related?

[JamieOxford]

Hello, I'm looking for some help repairing a FET47 Clone.

This mic was dropped and the capsule replaced and while the mic outputs sound, there are regular pops from the circuit every 10 seconds or so.

I noticed that wiggling R1/C1 was causing pops to occur more regularly, so have replaced those along with C2 & C3, which has reduced the amount of popping but also muted the output of the capsule (I think due to low polarisation voltage - it seems to only be getting a few volts). I've traced a voltage drop to T3/R9 and a transient pop (negative voltage) to R9/T5 but I'm not sure what could be causing these as the circuit is very interconnected.
Can anyone help with suggestions of what the cause of these pops might be? (I've attached the original FET47 schematic which is almost identical)

Thanks!

 

[Whoops]

have replaced those along with C2 & C3, which has reduced the amount of popping but also muted the output of the capsule

Replacing C2 & C3 for new caps of the same value should not cut the output,
so something happened there....

Are you sure you replaced for the same values?
Are they soldered properly?
Did any PCB trace was damaged with you desoldered the components?
Did any wire connection inside the mic broke while swapping/soldering components?