spacers under two of the mounting screws, and
a stack of spring washers under the third
mounting screw.
Before removing the board, turn the screw
going through the spring washers clockwise
and count the revolutions of your screwdriver
until the screw stops turning. Mark this down
so that the new circuit board can be adjusted to
that same adjustment point. Also note the
number and orientation of the spring washers
so you can duplicate that when installing the
new circuit board.
CARRIER BOARDS
Upper carrier circuit board
The Upper Carrier circuit Board contains the
phototransistors that sense the presents of the
cassette in the loading slot and carrier. It is
screwed in place with four mounting screws to
the 1/4" square horizontal carrier bars.
Lower carrier circuit boards
Underneath the floor of the carrier, there are
three circuit boards containing LED's for the
carrier cassette sensors as well as two opto-
interrupters for the carrier up/down sensing.
To replace these boards, raise the transport
panel to its upright position and detach the
metal "E" rings that secure the spring linkage
arms to the rotating carrier lift arms. Take care
not to drop washers or "E" rings down onto the
circuit boards. With the carrier linkage arms
detached, lower the transport panel so you
may raise the carrier assembly for easy access
to the bottom carrier circuit boards. The
bottom carrier circuit boards are attached with
4-40 elastic stop nuts and three nylon washers
between the circuit boards and metal carrier
floor. Make sure to duplicate this arrangement
of hardware when installing the new circuit
boards. Also be very careful not to break the
wires at the point where they are soldered to
the circuit board. This might happen if the
wires are bent at sharp angles Route the wires
through the cable clamps as the old boards
were mounted.
Beta, Betacam, and Betacam SP are Trademarks of SONY Corporation.
Tapechek is a registered Trademark of Research Technology International Company.
The TAPECHEK 4100 is a professional machine built to the highest standards. RTI
maintains a staff of service technicians at the factory as well as many qualified service dealers
throughout the world. We recommend that you contact RTI of your dealer if you notice a problem
that is not addressed in this manual - before attempting any repairs on your own. Our address is:
RESEARCH TECHNOLOGY INTERNATIONAL COMPANY
4700 CHASE AVENUE
LINCOLNWOOD, ILLINOIS, U.S.A.
Phone: 708 677-3000 Toll Free: 1-800-323-7520
Fax: 708 677-1311
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