Sharp VT-3428X, Service Manual, Page: 15 / 136

PRECAUTIONS IN REASSEMBLING
MOUNTING THE CONTROLLER
Initial setting is indispensable
before placing the cassette controller in the mechanism. The initial setting is
made in two ways; electrical and mechanical.
Electrical setting:
Make a short-circuit between and both located at the center on your side on VCR
with a ohm resistor and be sure that the mechanism is back to its initial setting position Now place
the cassette controller in position. (This method is used when the mechanism has been already set on its
Cassette control
drive gear
Phase matching point
Mechanical setting:
Turn the loading motor’s
pulley feed gear using a
screwdriver and be sure
that the mechanism is
back to its initial setting
position
Now place
the cassette controller in
position. (This method is
applicable f o r t h e
mechanism alone.)
COUPLING THE MECHANISM TO THE
Match the mechanism’s projections with the two symbols (round reference and oval sub-reference) on the
VCR Place the mechanism straight down in position with due care so that the mechanism chassis’s
outer edges should not damage any parts nearby.
Tighten up the two screws (one for fixing the mechanism and the head amplifier shield, the other on the
VCR
soldering side and located near the loading motor) to fix the mechanism and VCR
Reconnect the cables and and harnesses (ED and between the mechanism and VCR
Parts to pay attention to:
Start and end
Record tip switch:
Take special care of the MC-EC connector
(board
to
board) between
the mechanism
and VCR