MTP2850 Multimeter (Mastech MS8226 pcb)

[Metermeister]

Hello All

I'm in the process of repairing an old MTP 2850 DMM, I've replaced 5 caps and 1 resistor. Repaired the display and a few other quirks...a PCB schematic would make things alot easier so my question is...anyone have any idea where I could find such a schematic for this board? The PCB states it's an MS8226 clone. Alternatively if someone can point me to a good source for meter schematics in general that would also suffice.