T&T: ancient electronics

[Mike Euritt]

my boat came with Furuno equipment, a model 1800 radar, which I have the
manual for and a FMV-602 video fish finder that I have part of the manual,
poorly photocopied. Both the units are late 80's radar is 1987 manufactured
date, no date on the fish finder

I've googled and can find a FMV-601, but
mine is 602,  Does anyone have any ideas where I might locate a manual?
thanks

Mike
San Rafael