9
1.6 DISPLAY
The TFT LCD module is employed for the presentations. The control circuit and fluorescent
lamp for backlighting are molded in the LCD unit "EDTCA14QCF". The life of the fluorescent
lamp is approx. 20,000 hours if it is used with max. brightness.
High voltage for LCD backlighting is generated on the MAIN board and is outputed from J4-#1
and #2 to the LCD unit. Figure 1.9 shows the LCD inverter circuit. The output level between J4-
#1 and #2 is approx. 1.6 to 2.0kVpp when LCD unit is connected.
Waveform between J4-#1 and J4-#2
Figure 1.9 LCD inverter circuit on the MAIN board
1.6 DISPLAY
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