Protek 6510 Oscilloscope User and Service manuals

[EvgenyG]

Hi All,

Does anybody have a user and/or service manual for Protek 6510 Oscilloscope? Also known as Hung Chung 6510 - 100Mhz Oscilloscope.
It is a pretty nice old school analog scope. Had a fat trace fault that I've managed to fix. Would love to calibrate it now.
I've searched the Internet but I could only find user/service manuals for 6502/04/06 scopes but those are completely different inside, both horizontal and vertical units.