Nakamichi 680ZX : PB head replaced.. it was worn.. bad FR for right channel. Now, it is just perfect!!! From donor unit :-(.
Nakamichi RX-505 : tape tension issue fixed. Belt replaced, flywheels polished, they had issues with surface. Now it works as it should!
Nakamichi RX-505 : trying to figure out very rare issue... After starting recording for some tapes.. rec level drops down to zero.. I have checked and corrected everything I was able to do.. finally, it seems it is a main belt. Diff velocity on pinch rollers.. will check tmrw
TDK MA 110 : the one of the best cassette ever! Shipped my test one with the latest serviced deck by mistake.. so, need to open another one to make regular testing and calibration






