LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3.11.4 Key Pad
There are 24 buttons and 3 side keys in Figure. Shows the Keypad circuit. ‘END’ Key is connected
On_SW to PMIC(PM6650).
3. TECHNICAL BRIEF
- 52 -
Figure. Keypad Circuit
COL0
COL1
COL2
COL3
COL4
COL5
COL6
ROW0
MP3
C/BACK
MENU
Side
MOD
(up)
(FF)
ROW1
1
2
3
Left
Up
Side
MOD
(down)
(Play/Pause)
ROW2
4
5
6
OK
Right
Side
MOD
(function)
(REW)
ROW3
7
8
9
SEND
Option
ROW4
*
0
#
Down
Camera
8
HOT5
9
HOT3
2
OK
0
SND
CLR
KEY
HOT4
1
RIGHT
6
LEFT
3
4
SEARCH
DN
5
MENU
UP
7
BACK
504
RIGHT500
501
SEARCH500
10K
R403
HOT504
OK500
2
4
6
8
1
3
5
7
10K
RA500
509
506
500
505
SND500
CLR500
503
HOT503
DN500
MENU500
507
BACK500
508
502
LEFT500
UP500
HOT502
KEY_COL(0)
KEY_COL(2)
KEY_ROW(0)
KEY_ROW(2)
KEY_COL(1)
KEY_ROW(1)
KEY_ROW(3)
KEY_COL(4)
KEY_COL(3)
KEY_ROW(4)
VREG_MSMP_2.7V
Summary of Contents for TU550
Page 1: ...Date May 2007 Issue 1 0 Service Manual Model TU550 Service Manual TU550 Internal Use Only ...
Page 185: ...Note ...
Page 186: ...Note ...