Operation Board Section - Panasonic KX-FT902LS-B Service Manual

KX-FT902LS-B / KX-FT904LS-B

8.11. OPERATION BOARD SECTION

The unit consists of an LCD (Liquid crystal display), KEYs and LED (light-emitting diode). They are controlled by the Gate Array
(IC1) and ASIC (IC1: on the DIGITAL BOARD). The key matrix table is shown below.
ASIC
CN7
IC1
DIGITAL BOARD
CN1
XLED11,12
LED5
READ POSITION SENSOR
DOCUMENT SENSOR
LCD
(Chip on board type)
CN2
XLED13, 14
GATE ARRAY
IC1
KSL0~4
KIN0
KIN2~7
XLED 15
OPERATION BOARD
KX-FT902/904LS-B OPERATION BOARD: BLOCK DIAGRAM
142
SW41
SW42
7X5
KEYS
MATRIX
LED