Read Panasonic KX-T7665UA (serv.man3) Service Manual online
7
KX-T7665UA-B
4.2.2.
LCD Control Circuit
The LCD data is output from pins 52 to 58 of IC6.
LCD contrast adjustment is performed by the circuit composed of R603 and R604.
The contrast is determined only by the voltage level between pin 2 and pin 3 of CN5. Higher potential makes the contrast high.
LCD contrast adjustment is performed by the circuit composed of R603 and R604.
The contrast is determined only by the voltage level between pin 2 and pin 3 of CN5. Higher potential makes the contrast high.
LCD Contrast Control
CONTRAST
IC6 Pin 59
IC6 Pin19
HIGH
L
L
MIDDLE
Z
L
LOW
Z
Z
Click on the first or last page to see other KX-T7665UA (serv.man3) service manuals if exist.