Laserprinter Brother DCP-L2530 no power - Power Supply?

Hello

my printer have a problem with the power supply and only measure 6V instead of 24V.
My printer is a Brother DCP-L2530DW
It won't switch on

I've already checked most of the components on the power supply
No short circuit
Fuses - ok
PTC/NTC - ok
Thermal fuse - ok
MOSFET - ok
Optocoupler - ok
Electrolytic capacitors - ok
C10 and c11 - ok (100pF and 470pf / 1000V)
Primär - OK - 320V DC -OK

Unfortunately I don't have a datasheet of the IC MIP0050 and can't make any measurements - ramp voltage, supply voltage etc.

I would be very grateful for tips