Forgive me for asking what may seem like a stupid question:

What is an eccentric screwdriver?

My Pioneer service manual calls for using an L-shaped eccentric screwdriver (Pioneer part GGV-129) to adjust certain screws. So what makes it different from a normal L-shaped screwdriver?

Well, whatever it is, I figured out what the adjustment does and made my own custom tool.

i would have posted but didn't know what it was.
could it have been a translation error from Japanese to English or something??

or did it mean one of those split screwdrivers, i have a regular/flat head that has a push shaft to lock the screw
onto the driver.

Well, the term "eccentric driver" was a little misleading. I interpreted it as a screwdriver meaning I would be turning a screw. What you have is a hole that serves as a pivot point for the "driver" and the driver moves (in this case tilts) the laser pickup up or down relative to the pivot point. It's a little hard to explain without a picture.

oh, i sort of understand.
could have used one of those nylon TV adjusters for the trim pots.

Except the "pin" on the tool isn't centered, it's offset (thus eccentric). Used for side B centering on 3090, 501, 95, 97 type players and grating on some models....

I rigged up my own by grinding back most the head of a flathead screwdriver leaving a point on one side.

Very cool. I have one I made in exactly the same way. It never hurts to make your own tools

Um...what is an L-shaped screwdriver?

A screwdriver in the shape of an L

Couldn't have said it better myself

Hmm. I have a huuuuuge tool collection so I probably have whatever it is you guys are talking about, but I don't remember ever seeing a screwdriver that I would describe as "L shaped" in my life. What's the proper name for it?

Pioneer calls it an "eccentric driver". Had a retail price of $123.95 !!!!

i guess it's like those U style security screw drivers but with one part missing to make that L.

i know my father had to make one of those U style with two points for taking apart something.
pain in the A$$ those screws and bits are.

This is what one looks like:

Hmm

Thanks for sharring Ldservice

Ah, I see. There is nothing L-shaped about the actual driving portion of it, just the way they bent the handle. Any driver could be L-shaped like this, but the eccentric part is what matters.

THAT is correct

Now we circle back to the point of the original post