RIBBON DRIVE

TM 11-7025-233-23

2-10. RIBBON DRIVE

The ribbon cartridge fits onto the end of the ribbon drive motor shaft. The shaft

turns the cartridge mechanism to move the ribbon. The logic board controls the

ribbon drive stepping motor so that the ribbon advances only while the teleprinter

is receiving data and the carriage is in motion.

2-11. CONTROL PANEL

The control panel (fig. 2-8) allows the operator to set, control and store

teleprinter functions in memory and to display status on the print position

indicator. This panel mates with the T3NC circuit board which provides a matrix

signal for each key on the panel. The T3NC board connects to and provides its

signals to the logic board. The T3NC board has no power connections, fuses, or

jumpers. It is replaceable.

Figure 2-8.

Control Panel

2-7