Smps - Key/ Led/ Usb Port/ Ir Circuit Diagram - LG BP340 Service Manual

2. SMPS - KEY/ LED/ USB PORT/ IR CIRCUIT DIAGRAM

KEY
12
VSTB
11
10
9
LED
8
7
LED
6
5
4
P1 P1
USB USB
3
2
1
A B C D
R1 R1 100 100 KEY1 KEY1 STANBY/ON STANBY/ON
VSCK R2 R2 100 100 KEY2 KEY2 OPEN/CLOSE OPEN/CLOSE
C1 C1 C2 C2
R509 R509 0 0
VCC
R6 R6
200 200
LED1 LED1
LED_GREEN LED_GREEN
R7 R7 10K 10K Q1 Q1
NPN_3DG3904M NPN_3DG3904M
C6 C6
R8 R8
4.7K 4.7K
USB_VCC
1
USBM
2
USBP
3
USB_GND
4
5
6
7
C506 C506
8
10UF/6.3V/X 5R 10UF/6.3V/X 5R
C7 C7
0.1uF/25V/X7R 0.1uF/25V/X7R
E F G H
DuPont pin
+12V +12V +12V
GND GND GND
IROUT IROUT IROUT
VCC VCC VCC
USBP USBP USBP
USBM USBM USBM
USB_VCC USB_VCC USB_VCC
VSTB VSTB VSTB
VSCK VSCK VSCK
VSDA VSDA VSDA
IR
IR1 IR1
3
VCC
2
GND
1
IR
IRM IRM
FB503 FB503 120/2A 120/2A
I J K L M
3-15 3-16
1
+12V
1
2
2
3 IROUT R3 R3 100 100 IR
3
4
VCC
4
5
USB_GND
5
6 USBP
6
7 USBM
7
8
USB_VCC
8
9 VSTB
9
10 VSCK
10
11 VSDA LED
11
12
12
XP1 XP1
12PIN/2.0MM 12PIN/2.0MM
VCC
R4 R4 470 470
IR
R5 R5 2.2K 2.2K
C3 C3 C4 C4 C5 C5
47pF/50V/NP0 47pF/50V/NP0 0.1uF/50V/X7R 0.1uF/50V/X7R 1uF/10V/Y5V 1uF/10V/Y5V
N O P Q R S T