Service Manual needed for a HAMEG HM303-6 35MHz Oscilloscope

[graybeard]

I picked up this HAMEG HM303-6 35MHz cathode ray oscilloscope a few weeks ago a local auction with built-in component tester. 

It mostly is working but it has some issues I would like to fix.  The chief issue is that the intensity control must be turn up all the way yo get any trace, and that trace is not very bright.  My dilemma is I am unable to find a service manual or schematics for this model.  I can find schematics and service manuals for the HM303-6 and HM303-5, but those models are built mostly with through hole components.  This seems to be the last model of the line and is mostly surface mount components.

I would greatly appreciate if you can hook me up with a service manual an/or schematics for this HM303-6.

Thank You,
Chris