LG 42lk530 Service Manual page 25

IR & KEY
+3.5V_ST
+3.5V_ST
R903
47K
R905
IR
47K
R904
C 10K
Q901
B R909
2SC3052
3.3K
E
R908
OPT
C 47K
B
Q902 E
2SC3052
R902
0
OPT
COMMERCIAL
R911
R906 COMMERCIAL_EU
22
IR_OUT
COMMERCIAL
Q903
2SC3052
COMMERCIAL_EU
COMMERCIAL_US
WIRELESS
R912
R907
WIRELESS
22
IR_PASS
WIRELESS
Q904
2SC3052
WIRELESS
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.
Q901,Q902,Q903
Q904,Q905,Q906
D903,D904
D905,D906
+3.5V_ST
R920
R919
10K 10K
1% 1%
R915
100
KEY1
R916
D902
100
5.6V
KEY2
AMOTECH
C901 C903
0.1uF 0.1uF
+3.5V_ST
D901
5.6V
AMOTECH
+3.5V_ST
L901
BLM18PG121SN1D
C902 C904 C905
0.1uF 0.1uF 1000pF LED_B/LG_LOGO
16V 16V 50V
OPT OPT
+3.3V_Normal
+3.5V_ST
BLM18PG121SN1D
+3.5V_ST
47K
C912
0.1uF
R917 16V
47K ESD_ATSC
R913 COMMERCIAL
C 10K
B
E S/T_SCL R935
R921
100
COMMERCIAL_EU C 47K
B
Q905 COMMERCIAL
E
2SC3052
COMMERCIAL
R910 R936
S/T_SDA
0 100
+3.5V_ST
+3.5V_ST Zener Diode is
47K
R918 close to wafer
47K
R914 WIRELESS
C 10K
B
E WIRELESS
R922
C 47K
B
Q906 WIRELESS
E
2SC3052
WIRELESS
DUAL COMPONENT
1ST : 0TRIY80001A 2ND : 0TR387500AA
1ST : EAH42720601, 2ND : EAH60994401
IR_12P
R933
EEPROM_SCL P902
100
12507WR-12L
D905
CDS3C05HDMI1
5.6V
1
R934
EEPROM_SDA
100
2
D906
CDS3C05HDMI1
5.6V 3
4
5
6
R928 1.5K
7
8
9
D907
C911 5.6V
AMOTECH
100pF
10
50V
L902
11
C913 R929
0.1uF 12
LED_R/BUZZ
16V
1.5K
ESD_ATSC
D903
CDS3C05HDMI1
5.6V
D904
CDS3C05HDMI1
5.6V
IR_15P
P901
12507WR-15L
EEPROM_SCL
1
EEPROM_SDA
2
GND
3
KEY1
4
KEY2
5
3.5V
6
GND
7
LED_B/LOGO
8
IR
9
GND
10
3.3V
11
LED_R/BUZZ
12
13 GND
13
S/T_SCL
14
ST_SDA
15
16
.
BCM35230
IR/KEY 9 50