Operation - Sony TC-42 Service Manual

1-2. AUTO SHUT-OFF MECHANISM OPERATION
TC-42 mechanism is designed so that the unit will shut itself off automatically at tape end in record or playback mode.
Gears in gear block ass''y and FS
gear are not in mesh as long as tape
remains on the spindle in record or
playback mode.
tape tension pick-up
FWD/STOP knob
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At tape end in record or playback
mode. Tape tension pick-up detects
tape tension and gears in gear block
ass'y are moved to mesh with FS
Turning force of FS gear is trans-
mitted to gear B and jut of gear B
pushes function lever ass'y as shown
by the arrow.
function lever ass'y
After automatic shut-off operation
the unit is placed in stop mode.