Operating instructions

The optional CB-148 Auto Locator with a built-in stop watch attaches to the
same stand as the CB-147 and provides independent readouts and controls
for the elapsed tape time and locate time. The locator also features zero cue,
10 keyboard assignable memories (keyboard or direct tape time memories)
with direct recall, a shuttle function for repeating any desired segment of the
tape, and other time saving functions.
The optional EC-101 Plug-in Chase Synchronizer allows the MTR-90III to be
controlled via SMPTE/EBU time code for slave operation. With the optional
CB-121 Synchronizer Remote Control Unit, the EC-101 can input TC offset as
well as monitor master TC, slave TC and difference of time codes.
CAUTION: The DC reel motors develop substantial torque. Never place a
hand, clothing or other objects inside, on top or near a reel or swing arm
when initiating tape motion. When using the Remote Session Controller or
Auto Locator, always make sure anyone near the transport is aware of the
potential hazard posed by the high torque motors which are capable of
increasing the tape tension very rapidly.
1.2 Using This Manual
1.2.1 Organization
This manual is divided into nine sections beginning with this Introduction
which contains general information about the machine and about the manual.
Section 2 Installation and Inspection: This section of the manual contains
the information required when unpacking and installing the MTR-90III for the
first time or when interfacing the machine to a mixing console or other
equipment.
Section 3 Controls and Indicators: This section of the manual contains a
keyed guide to the controls and indicators and provides detailed information
about each control and its functions. This section of the manual should be
used whenever a question about the function of a particular control or
indicator arises.
Section 4 Operation: This section of the manual describes the operation of
the MTR-90III. It contains a list of all the operating modes of the machine
and an in-depth description of all MTR-90III operations organized by
function. The functional checkouts in Section 2 should be carefully
performed when the MTR-90III is first installed.
Section 5 Maintenance: This section covers the routine maintenance
procedures necessary to keep the MTR-90III in peak operating condition.
Section 6 Alignment: This section of the manual covers the information
needed to perform the routine alignments and calibrations associated with
normal operation of the MTR-90III. You should refer to this section of the
manual when performing the normal maintenance and calibration routines
that must be done to keep the recorder operating at peak performance.
Section 7 Specifications: This section of the manual contains the operating
specifications for MTR-90III series machines.
SECTION 8 Printed Circuit Board Layouts: This section of the manual
contains two-color "x-ray" views of major printed circuit boards showing
component locations and foil traces.
MTR-90III Operation and Maintenance Manual
October 1990
Section 1 Introduction
1 - 3