Jack/ Led/ Touch Key Circuit Diagram - LG SH2 Service Manual

4. JACK/ LED/ TOUCH KEY CIRCUIT DIAGRAM

From MAIN
12
C505
11
10
L501
9
10
8
9
7
6
From Touch
5
4
3
2
1
: WAVEFORM NUMBER
A B C D
POWER
FUNC
VOL_UP
VOL_DN
IC501
LD504
LD502 LD503 LD505
PORTABLE
OPTICAL BLUTOOTH LG TV
(MUTE)
OPTION : PORTABLE FUNCTION
MLC3730,A2 : HIGH
OPTICAL / BT / LG TV / PORTABLE
MLC3730,A2 : LOW
OPTICAL / BT / LG TV / MUTE
E F G H
3-27
From MAIN
From MAIN
PN505
PN508
EUROPE
LD501
STBY
I J K L M
3-28
OPTICAL IN
JK551
L551
FB552
FB553
PORTABLE IN
FB554
AGNDJ
JK553
L552
LUG501
EMI
N O P Q R
SUB WPPFER OUTPUT
SP_TERMINAL
JK552
DOWN LOAD
S T