Front Led Display, Key Control Circuit Diagram - LG DP132 Service Manual

5. FRONT LED DISPLAY, KEY CONTROL CIRCUIT DIAGRAM

+5V
2 +5V
12
GND
2 GND_POWER
GND_POWER GND_POWER
11
1
1
2
XS2 XS2
2
14PIN/2.0mm 14PIN/2.0mm 3
3
4 +5V
4
5 KEY2
5
6 LED
6
7
KEY1
7
8
10
8
9 IR_IN
9
10 GND
10
11 USB5V
11
12 FGND
12
13 USB_DP
13
14 USB_DM
14
9
8
7
6
LED CONTROL:
H: ON
L: STANDBY
5
4
3
2
1
A B C D
C302 C302
100pF/50V/NP0 100pF/50V/NP0
C303 C303
100pF/50V/NP0 100pF/50V/NP0
NOTE:
KEY1 USE GPIO 2 DATA ;
KEY2 USE GPIO 1 STB ;
LED USE GPIO 0 CLK ;
+5V
R307 R307
2K 2K
LED301 LED301
LED_RED LED_RED
ON RED
LED R305 R305 4.7K 4.7K Q1 Q1
NPN_3DG3904M NPN_3DG3904M
R306 R306
C301 C301
2.2K 2.2K
1uF/10V/Y5V/NC 1uF/10V/Y5V/NC
LOAD
NOTE:
T=250ms
E F G H
K303 K303
POWER POWER
K301 K301
OPEN/CLOSED OPEN/CLOSED
I J K L M
3-35 3-36
IR1 IR1 IRM_8.3mm IRM_8.3mm
+5V
R308 R308 470 470
IR_IN
C304 C304 C305 C305
47pF/50V/NP0 47pF/50V/NP0 1uF/50V/Y5V 1uF/50V/Y5V
NOTE: R1 for Jumper
P301 P301
USB USB
USB5V
1
USB_DM
2
USB_DP1 USB_DP
3
4
5
C306 C306
6
NC/100pF/50V/NP0 NC/100pF/50V/NP0
7 C307 C307
8
NC/100pF/50V/NP0 NC/100pF/50V/NP0
N O P Q R S T