CIRCUIT DIAGRAM-MAIN BOARD
TP13 TP14 TP15
TP12
5
5
4
4
3
3
2
2
1
1
CON5/1.25MM/DIP
J2
TO KEY BOARD
S5
KEY
KD1
1N4148
S2
KEY
S3
PGND
KEY
IN TFT BOARD
7-3
S6
KEY
S1
KEY
KD2
1N4148
S4
KEY
P_P+3V3
KR1
10K
P_P+3V3
KR2
10K
P_P+3V3
KR3
10K
P_KEY0
P_KEY0
P_KEY1
P_KEY1
P_KEY2
P_KEY2
P_KEY3
P_KEY3
P_P+3V3
KR4
10K
5
5
5
5