LG 32LD350 - Key Board Section

KEY BOARD SECTIONKEY BOARD SECTION
The Key board is routed to the IR board from P3000 to J3 and output on J1 Key 1 and Key 2 lines.
Key Board
p/n: EBR65863602
The
Key
board
is
routed
to
the
IR
board
from
P3000
to
J3
and
output
on
J1
Key
1
and
Key
2
lines.
Arriving at P2401 pins 4 and 5 on the Main Board.
Then to the Microprocessor Pins A4 and B4.
On P3000 (Key 1 is pin 1 and Key 2 is pin 3), Pins 2 and 4 are ground.
Key 1 / 2 Voltage and Resistance Chart with buttons pressed.
Label Function Resistance Voltage
K
ey
1
Vo
l + 17M 1.7
0V
Voltage and Resistance taken
with AC applied to the set.
NBtt dR it
ey
o
0
Vol - 10M 1.09V
Menu 5.27M 0.52V
Enter 0.98M 0.10V
N
o
B
u
tt
on presse
d
R
es
i
s
t
ance
is Open and Voltage is 3.4V.
Diode Check on Key 1 and Key
2 is O
p
en.
Label Function Resistance Voltage
Key 2 CH + 17M 1.70V
p
Voltage with no key pressed
3.4V STBY and 3.39V RUN
CH - 10M 1.09V
Power 5.27M 0.52V
Input 0.98M 0.10V
November LCD TV 32LD350
65