Operation Board Section - Panasonic KX-FP81BX Service Manual

6.11. OPERATION BOARD SECTION

The unit consists of a LCD (Liquid crystal display), KEYs and LEDs (light-emitting diodes). They are controlled by the Gate Array
(IC301) and ASIC (IC501: on the DIGITAL BOARD). (Fig.-a)
The key matrix table is shown below.
ASIC
CN504
IC501
DIGITAL BOARD
Key Matrix
CN302
CN301
GATE ARRAY
IC301
XL11, 12
DOCUMENT TOP SW
DOCUMENT SET SW
169
LCD MODULE
KSL0~4
7x5
KEYS
KIN0~6
MATRIX
OPERATION BOARD
KX-FP81BX / KX-FP81CX / KX-FP82CX