Keypad Switching & Scanning - LG KE600 - Cell Phone Service Manual

3.8. Keypad Switching & Scanning
The keypad interface is a peripheral which can be used for scanning keypads up to 8 rows (outputs
from Port Control Logic) and 8 columns (inputs to PCL). The number of rows and columns depend on
settings of the PCL.
CN101
G1
1
2
3
R108 0 4
JOG_DISK_A
R110 0 5
JOG_DISK_B
R113 0 6
JOG_PWDN
7
8
JOG_LED_ANODE
9
JOG_LED_CATHODE
10
G3
AXK7L20227G(0.9T)
SOCKET
KEY-JOG MODULE 20 PIN CONNECTOR
ENBY0016601
2V72_IO
G2
20
19 R106 0
18
17
16
15
14
13
12
11
G4
Figure 12 SUB PCB part Jog-key matrix
KB401 KB402 KB403
1 4 7
KB404 KB405 KB406
2 5 8
KB408 KB409 KB410
3 6 9
Figure 13 MAIN PCB part numeric key matrix
VBAT
END
END_KEY
KP_IN0
END
KP_IN1
KP_IN2
KP_IN3
KP_IN4
KP_OUT3
KP_OUT4
SLIDE KEYPAD ARRAY
KEYPAD
CN401
NEO_LEFT_SIDEKEY_PAD
4
3
2
1
KB_star
R422 680
*
KB407
R423 680
0
KB_shap
R427 680
#
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3. TECHNICAL BRIEF
C101 C102
R102 R103
NA NA
0 0
MP3 SEND
OK SNED
R112
0
C103
NA
NEO_RIGHT_SIDEKEY_PAD
CN402
1
2
3
KP_OUT0
KP_OUT1
KP_OUT2
KP_OUT3