Epson PX-8 Technical Manual page 11

REV.-A
1.3.3 Keyboard
Matrix keyboard uses mechanical contact switches. Switches, reverse-current protection diode
and mode indication LED lamps are implemented on the control board.
Fig. 1-5
1.3.4 LCD
The LCD is a twist pneumatic (TNM) effect type liquid-crystal display. The screen angle can be
changed arbitrarily. VIEW ANGLE volume is provided to correct the change of liquid crystal dis-
play condition caused by temperature rise or fall.
r
Fig. 1-6
1.3.5 Main battery
The main battery is Ni-Cd with a nominal voltage of 4.8V. When the battery is fully charged, the
voltage is 5.0V or more, enough to provide power for circuit operation. The battery can be easily
removed and replaced by removing the battery cover on the bottom of the unit.
Fig. 1-7
1-7