LG 32LD350 - Page 61

FRONT (IR and POWER LED) SECTIONFRONT (IR and POWER LED) SECTION
The IR board (located on the bottom left as viewed from the rear) contains the IR (Infrared) Remote
Sensor and Power LEDs. This board also connects to the Key Board.
The IR board receives it operating B+ via J1 pin 6 (STBY 3.5V).
The IR (Infrared) remote receiver can be measured (2V) at pin 9 of connector J1 or P2401 on the Main
board in Stand-By. During run pin 9 reads (1.98V).
The IR pulses (1.6V p/p) J1 pin 9 are sent to P2401 on the Main board and on to the Microprocessor
The
IR
pulses
(1.6V
p/p)
J1
pin
9
are
sent
to
P2401
on
the
Main
board
and
on
to
the
Microprocessor
(IC100) via pin C4.
The Front Power LEDs are controlled by pins 8 (Blue LED) and 12 (Red LED) of J1.
ThK b di tdtthIRb diJ3 d t t J1K 1 dK 2li
Th
e
K
ey
b
oar
d
i
s rou
t
e
d
t
o
th
e
IR
b
oar
d
v
i
a
J3
an
d
ou
t
pu
t
on
J1
K
ey
1
an
d
K
ey
2
li
nes,
(Key 1 pin 4 and Key 2 pin 5). Arriving at P2401 pins 4 and 5 on the Main Board.
Then to the Microprocessor Pins A4 and B4.
November LCD TV 32LD350
61