TM
11-5835-243-34/EE641-AA-MMl-010/E154 MTT/TO 31S3-4-110-1
input of the power supply.
b. Read/Write Electronics. The read/write elec-
tronics consists of three digital read/write circuit
f. Tape Deck Assembly. The tape deck assembly
(A8, fig. 1-2) is mounted on the frame assembly of
card assemblies (Al, A2, A3, fig. 1-2), which are
the tape transport and provides a positive, spring-
plugged into the vertically-mounted harness and
loaded mechanism for the insertion, retention, and
interface board assembly (A 10). The interface board
removal of the tape cartridge. The tape deck serves
is secured to the tape transport frame assembly.
as' a compact package for electromechanical
Each read/write circuit card assembly contains
assemblies and interconnecting wiring. The capstan
three read amplifiers and three write amplifiers,
motor assembly (B1); magnetic head assembly
providing a total capability of nine-track reading
(PU1); power amplifier assembly (A9); the low tape,
and nine-track writing. This parallel nine-track 888
hole, and strip sensors; and the write permit and
bpi, NRZ1 configuration is compatible with
cartridge in place switches are all mounted on the
ANSI/IBM computer digital recording.
tape deck.
c. Control Logic. Digital parallel interface logic is
g. Front Panel Assembly. The front panel
controlled by the control logic circuit card assembly
assembly (A7, fig. 1-2) consists of the front panel on
(A4, fig. 1-2). The control logic circuit card
which the operating controls and indicators are
assembly is plugged into the same vertically-
mounted, and the access door which protects the
mounted harness and interface board assembly as
the three read/write circuit card assemblies.
tape deck mechanism. Controls and indicators are
d. Servo-Control. Electronics controls for the
described in TM 11-5805-681-12-1 and TM
11-5805-683-12-1. The hinged access door con-
servo system are mounted on the servo control
tains an EMI gasket which provides a seal when the
circuit card assembly (A5, fig. 1-2). The servo
door is closed. The door is secured in the closed
system includes the capstan motor assembly (B1)
position by two captive wing studs. A door-operated
and power amplifier assembly (A9). The servo
front panel switch prevents the tape transport from
control circuit card assembly is also plugged into
operating when the door is open.
the vertically-mounted harness and interface board
h. Tape Track Allocation. The tape transport rec-
assembly (A10).
e. Power Supply. The power supply assembly
ords and reproduces digital data utilizing a nine-
track parallel format on the magnetic tape con-
(PS1, fig. 1-2) is mounted inside the rear of the tape
tained within the magnetic tape cartridge. The nine-
transport frame, behind the circuit card assemblies.
track parallel format is compatible with ANSI and
Forced air cooling is not required. An EMI/RFI line
IBM track format as shown in figure 1-3.
filter assembly (FL1, fig. 1-2), is coupled to the line
EL4RD004
Figure 1-3. Tape Track Allocation.
1-5
