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SOFT30 0
SEND
DIGIT30 0
DIGIT30 3
DIGIT30 6
STAR
VBAT
U303
4
VIN
3
KEY_LED_ON
EN
C311
KEYIO(0)
KEYIO(1)
KEYIN(2)
KEYIN(1)
KEYIN(0)
KEYOUT(0)
KEYOUT(1)
KEYOUT(2)
KEYOUT(3)
KEYIO(2)
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UP
SOFT301
INT
END
DOWN
DIGIT30 1
DIGIT302
DIGIT30 4
DIGIT305
DIGIT30 7
DIGIT308
DIGIT309
SHARP
1
VOUT
2
GND
R310
C312
LED301
LED302
LED303
KEY LED
SEND
1
2
DIGIT300
DIGIT301
1
2
1
2
DIGIT303
DIGIT304
1
2
1
2
DIGIT306
DIGIT307
1
2
1
2
STAR
DIGIT309
1
2
1
2
KEY MAP
9-14
Flow Chart of Troubleshooting
DOMM201
LED304
LEFT
1
2
DIGIT302
SOFT300
DOWN
1
2
1
2
1
2
DIGIT305
SOFT301
INT
1
2
1
2
1
2
DIGIT308
UP
1
2
1
2
SHARP
RIGHT
1
2
1
2
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