Tandon TM100-1 Operating And Service Manual page 9

INTRODUCTION
This document provides required information in
order to evaluate and incorporate Tandon' s disk
drive into a system.
Tandon Corporation' s Model Number TM100-1
and TM100-2 are full-feature, 5-1/4-inch, flexi­
ble disk drives. They are compact data storage
devices that use an ANSI-compatible, industry
standard, 5 - 1/4-inch diskette.
Model Number TM100-1 and TM100-2 drives
each have forty-eight (48) tracks per inch. The
TM100-1 is a single-sided recording device. The
TM100-2 is a double-sided recording device.
Both drives are capable of reading and writing
in single-density format on a diskette, using a
proprietary read/write head patented by
Tandon. The drives have a double density capa­
bility when Modified Frequency Modulation
(MFM) or other appropriate recording technique
is used. Encoding and decoding of the data is
done by the user' s controller.
1.1 S C O P E OF THE
DOCUMENT
This document contains the major features,
physical and functional specifications, mounting
and power requirements, the interface, and typi­
cal timing characteristics of the TM100-1 and
TM100-2 drives. In addition, there is a theory of
operation, checks and adjustment procedures,
troubleshooting guide, replacement procedures,
assembly drawings, and schematics.
1.2 PURPOSE OF THE DRIVE
The TM100-1 and TM100-2 drives are rotating
disk memories designed for random access data
SECTION 1
GENERAL DESCRIPTION
entry, storage, and retrieval applications.
Typical applications include intelligent terminal
controllers, microcomputers, word processing
systems, data communication systems, error
logging, program loading, and point-of-sale
terminals.
1.3 MAJOR FEATURES
WRITE PROTECT
When a write protected diskette is inserted into
the drive, the write electronics are disabled.
DAISY CHAIN CAPABILITY
The drive provides the address selection and
gating functions necessary to daisy chain a
maximum of four units at the user' s option. The
last drive on the daisy chain terminates the
interface. The terminations are accomplished by
a resistor array plugged into a DIP socket.
INTERNAL TRIM ERASE
The drive provides the control signals necessary
for proper trim erasure of data.
INDUSTRY STANDARD INTERFACE
COMPATIBILITY
The drive is compatible with controllers that use
an industry standard interface.