开云体育

Ihave a trouble QMX+

? ?The voltage display ?fluctuates between 10V and 12V. ? ? ? ? ?

In the receiving state, with L502 removed.
the source voltage of Q507 (AOD403) is stable at 12V,
but the drain voltage fluctuates between 10V and 11V.
The Vgs of Q507 is unstable ?around 3.8V (-3.8V).
?Is it a damage to Q507 (AOD403)　or a damage in the?
circuit of Q512 to Q514?