Digitech QC1924 oscilloscope

I'm looking for a manual and schematics for a Digitech QC1924 40MHz dual trace scope sold by Jaycar in Australia late 2000's if anybody has one please (good PDF OK).

Trying to help someone else get one going - horizontal side has partially failed ie half a screen display only.

I expect it's failed drive transistor(s) but trying to do this remotely without a schematic isn't helping the cause.

Here's a pic of the scope, it most likely is a re-branded scope out of Taiwan.