LG 37LV370S Service Manual page 35

IR & KEY
IR
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FILRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFATURES SPECFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
Copyright © 2010 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
+3.5V_ST
R4702
R4701
10K
10K
1% 1%
R4710
100
KEY1
R4711
100
+3.5V_ST
KEY2
+3.5V_ST
R4712
47K
COMMERCIAL
+3.5V_ST
R4714
47K
R4713 COMMERCIAL
C 10K
Q4701
B R4717
2SC3052
3.3K
E COMMERCIAL
COMMERCIAL R4716
OPT
C 47K
B
Q4702 E COMMERCIAL
2SC3052
COMMERCIAL
R4709
0
COMMERCIAL +3.5V_ST
+3.5V_ST
R4719
47K
R4715
COMMERCIAL
22
R4721
IR_OUT
47K
COMMERCIAL
R4720 COMMERCIAL
C
10K
Q4703
B
2SC3052
E
COMMERCIAL_EU
R4722
COMMERCIAL_EU C 47K
B
Q4704 COMMERCIAL
E
2SC3052
COMMERCIAL
OPT
R4718
0
DUAL COMPONENT
D4703,D4704
1ST : EAH42720601, 2ND : EAH60994401
D4705,D4706
EEPROM_SCL R4705
100
R4706
EEPROM_SDA 100
D4702
5.6V
AMOTECH
C4701 C4703
0.1uF 0.1uF
D4701
5.6V
AMOTECH
+3.5V_ST
L4701
BLM18PG121SN1D
OPT OPT
R4707 1.5K
C4702 C4704 C4705
0.1uF 0.1uF 1000pF LED_B/LG_LOGO
16V 16V 50V
D4705
C4708 5.6V
AMOTECH
100pF
+3.3V_Normal
50V
L4702
BLM18PG121SN1D
C4709 C4710
OPT OPT
0.1uF 0.1uF
LED_R/BUZZ
16V 16V
R4703
S/T_SCL
100
D4703
CDS3C05HDMI1
5.6V
R4704
S/T_SDA
100
D4704
CDS3C05HDMI1
5.6V
P4701 P4702
12507WR-15L 12507WR-12L
D4706
CDS3C05HDMI1
5.6V IR_15PIN IR_12PIN
1 1
2 2
D4707
CDS3C05HDMI1
5.6V 3 3
4 4
5 5
6 6
7 7
8 8
9 9
10 10
11 11
R4708
12 12
1.5K
13
13
14
15
16
LV7 EU IR
BCM35230
47 50
LGE Internal Use Only