Lcd Section - Panasonic KX-FHD333BR Service Manual

8.13. LCD SECTION

The Gate Array (IC301) works only for writing the ASCII code from the data bus (D4~D7). V0 is supplied for the crystal drive.
R303, R305, and R306 are density control resistors.
Consequently, in this unit, the timing (positive clock) is generated by the LCD interface circuitry in the gate array (IC301).
DIsplay mode
2 lines (X1. 0) LED1 (IC301-22pin)
XLD15 (IC301-21pin)
X1. 5 LED1
XLD15
Density Normal
H
L
H
Hi-Z
155
KX-FHD333BR
Darker
L
L
H
L