I purchased a Tascam DA-30 for a mastering project and this deck is totally new to me.

Some n00b questions:
- What are some ways to test it? (I'm mostly concerned with playback)
- Any common failure points that I should be weary of?
- Any maintenance I should do? e.g., lubricating gears, etc.
- Should I send it to a pro to be serviced? (Any service folks you recommend?)
I'm not afraid to open it up and get my hands dirty, so any tips, experience, and/or links to YouTube videos are appreciated!
Thanks!

P.S. Can someone DM me the Tascam DA-30 Owner Manual (PDF)? (Not the service manual, not the DA-30MKII manual). HiFi Engine closed their site to new registrations, so I can't download if from
https://www.hifiengine.com/manual_library/tascam/da-30.shtml.
Thx