GENERAL
The TapeChek 4100 transports the videotape at approximately 120 ips. The machine also has many
mechanisms which are operated by 11 different motors. We have tried to design the product with
assemblies to be self-adjusting where possible, but, obviously, some parts of the machine do require
adjustment if new parts or assemblies are installed.
In general, anything in the threading path of the videotape that touches the tape should be
perpendicular to the transport panel. The exceptions to this rule are the crown threading arm rollers
and the tape tach timing assembly. The operating tape path height is 1.145" from the bottom edge of
tape to the top of the transport panel.
CASSETTE CARRIER
The carrier should be aligned with the opening in the front panel of the machine. If it is not,
cassette may not load properly. To adjust the carrier height, up and down, so that it matches the
opening of the front panel, the entire transport panel is raised and lowered by moving its mounting
brackets on the left and right sides of the bottom part of the cabinet. This adjustment is made when
the carrier lift assembly is in its full "up" position.
The left/right position of the carrier is determined by 2 small brackets which have black plastic
rollers that ride on the sides of the carrier assembly. The carrier brackets are adjusted left and right
so that when the cassette is lowered onto the transport panel, the cassette is in alignment with the
cone shaped support pins and other sensors on the transport panel. Using just the bottom half of a
Betacam cassette shell will show when the carrier is in alignment with the transport mechanism.
The carrier floor is adjustable by its four mounting screws to the carrier arms. This adjusts the
position of the carrier floor (and the cassette) toward the front or back of the machine. These four
screws also allow you to adjust the height of the carrier floor when the carrier is in the down position.
In the down position the carrier floor should drop away from the video cassette and leave
approximately a 1/16" gap between a small cassette shell bottom and the carrier floor so that the
cassette is solely resting on the support posts of the transport panel.
MAGNETIC HEADS (Optional)
The face if the magnetic heads should be square to the panel as measured with a triangle or other
square block. This is also true for the tape guide post next to the moveable erase head. Also, the head
should be adjusted so that the wrap of the tape is sufficient to cover the black area of the face of the
head.
Head
Tape Wrap
The angle of the tape going into the head should also be approximately equal to the angle of the
tape leaving the head. This is adjusted by the mounting screws for the head itself. It is normal for the
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