Operation Board Section - Panasonic UF-5500 Service Manual

UF-5500 / 4500

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 STOP COPY
KSL1 3 6
KSL2 2 5
KSL3 REDIAL/PAUSE Abbr Dial
KSL4 1 4
(LED7)
*LED7 should be set to KSL4. "8 x 5" key matrix is executed by hardware scanning.
b. Soft Scan
2. LED
• Active port---LED2 (IC1-36pin)
• Status---LED3 (IC1-37pin)
• Scan----LED4 (IC1-38pin) (UF-5500 only)
• Lower---LED5 (IC1-41pin)
CN511 CN2
3x2
KEYS
MATRIX
(Soft)
KIN1 KIN2
Lower S16/32
S7/23 S6/22
MONITOR
S2/18 S10/26
7 S4/20
SKIN0(XLED9)
SKS0
(LED6)
SKS1 SCAN
(LED8) (UF-5500 only)
RESOLUTION
(UF-4500 only)
LCD MODULE
CN1
GATE ARRAY IC
IC1
OPERATION BOARD
KIN3 KIN4
START S8/24
9 #
8 0
Set
Flash/Sub addr
SKIN1(XLED10) SKIN2(XLED12)
Function Clear
RESOLUTION Contrast
(UF-5500 only)
62
8x5
KEYS
MATRIX
(Hard)
LED
KIN5 KIN6
S14/30 S15/31
S5/21 S13/29
S12/28 S11/27
S9/25 S1/17
S3/19
KIN7