1604 VLZ PRO Mackie mixer schematic / advice please

[zen]

Hi all , this unit has an issue on the back end input board .

Flexing the board causes cracking & distorted audio .

Struggling to isolate cause .

[CapLeaker]

Re: 1604 VLZ PRO Mackie mixer schematic / advice please

figure out on where the problem lies by flexing or poking with a wooden spoon at things or heating up or freezing certain areas. Maybe you could isolate down to an area, then resolder or reflow it. Sometimes you have to totally desolder the offending part, clean the through hole and put it back in.

[zens electronics]

Re: 1604 VLZ PRO Mackie mixer schematic / advice please

Cheers , but issue is so sensitive .

Tried heat / freeze aswell

Most components on the board are SMD types , which are so difficult to access , as ports in the way .

Absolute nightmare to work on .