LG MG210 Service Manual page 37

3. H/W Circuit Description
3.5.12. Keypad Switching & Scanning
KBC0
KBR0 LEFT
KBR1 1
KBR2 4
KBR3 7
KBR4 AST
DBB supports 23 Key Map and Switch-ON Key is connected directly to ABB as (Figure18 ).
KBR(2)
KBC(4)
KBR(3)
KEY
PWON
KBR(1)
KBR(2)
KBR(3)
KBR(4)
KBR(0)
KBC(0)
KBC(1)
KBC(2)
KBC(3)
KBC(4)
Table 3-10. Keypad Map
KBC1
RIGHT
2
5
8
0
SIDEKEY(VOLUME)
100
R313
R314 100
R315 100
Close to Side-key PAD
PWR
R336 680
300
R338 680
303
R341 680
306
R342 680
AST
R343 680
LEFT
R344 680
R345 680
R346 680
R347 680
R348 680
R349 680
Figure 16. Keypad Scanning Scheme
- 36 -
KBC2 KBC3
UP DOWN
3 F3
6 F1
9 F2
SHA SEND
CN302
4
3
2
1
301 302 F300
304 305 F301
307 308 F302
309 SHA SEND
RIGHT UP DOWN
KBC4
OK
VOL_UP
VOL_DOWN
OK