Operation Board Section - Panasonic KX-MB771GR Service Manual

KX-MB771GR

6.13. 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
(IC1) on Operation board and IC300 on Main board.
The key matrix table is shown below.
ASIC
IC300
MAIN BOARD
1. Key Matrix
a. Hard Scan
KIN0
KSL0 AUTO ANSWER S1
KSL1 FAX S2
KSL2 COPY COLLATE
KSL3 CONTRAST
KSL4 SCAN RESOLUTION LOWER
(LED7)
*LED7 should be set to KSL4. "8 x 5" key matrix is executed by hardware scanning.
2. LED
• AUTO ANSWER LED ON/OFF port---LED6 (IC1-2pin)
• FAX MODE LED ON/OFF port---XLED8 (IC1-5pin)
• COPY MODE LED ON/OFF port---LED5 (IC1-41pin)
• SCAN MODE LED ON/OFF port---LED2 (IC1-36pin)
CN511 CN2
KIN1 KIN2
S3
ZOOM
N in 1
LCD MODULE
CN1
GATE ARRAY IC
IC1
KIN3 KIN4
↓
MONITOR
←
FLASH
REDIAL SET
↑
MENU
→
CALLER ID
50
8x5
KEYS
MATRIX
(Hard)
LED
OPERATION BOARD
KIN5 KIN6
*
#
7 0
4 9
2 5
1 8
KIN7
-
START
6
STOP
3