Vintage Sony reel-to-reel tape deck repair. As usual with equipment like this, the mechanism needed hardened grease cleaned out followed by lubrication.

Sony TC-377 - function knob suddenly doesn't latch into position - UK Vintage Radio Repair and Restoration Discussion Forum

SONY TPS-L2/WM-3 restoration tutorial (mechanical)

Notes on Vintage Electronics Repairs / Stereo / Hi-Fi Repairs

Sandy, Author at Reel-to-Reel Tech

Rebuilding an Aiwa XK-S7000 mechanism : r/cassetteculture

Factory S4 Stereo Information - - Mazda RX7 Forum

Sony WM-EX7 serviced to it's former glory : r/cassetteculture

Repair compact cassette - Tapehead

Joseph Greco Photographer Blog - JOSEPH GRECO PHOTOGRAPHER

Walkman WM-7 excessive wow and flutter : r/cassetteculture

Help repairing a reel to reel deck - Gearspace