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1) Circuit Operation
The LCD data is output from pins 32 to 35, 40 to 47 and 11 of IC6.
LCD contrast adjustment is performed by the circuit composed of Q28, Q29, R109, R108 and
R106.
The contrast is determined only by the voltage level between V5 and VEE of IC203, IC204 and
IC205.
Higher potential makes the contrast high.
18
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