Operation Board Section - Panasonic KX-FHD333BR Service Manual

KX-FHD333BR

8.12. 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).
The key matrix table is shown below.
ASIC
IC501
DIGITAL BOARD
Refer to BUTTON LISTS (P.4).
Key Matrix
LED
Caller IQ LED ON/OFF port.....LED2 (IC301-36)
CN504 CN301
XL9, 10
DOCUMENT TOP SW
DOCUMENT SET SW
OPERATION BOARD
LCD MODULE
CN302
GATE ARRAY
IC301
KIN0~7
LED2
KX-FHD333BR : OPERATION BOARD BLOCK DIAGRAM
154
KSL0~4
8x5
KEYS
MATRIX
LED