LG 50PK550 Service Manual page 29

POWER B/D
+5V_ST
R837
2K R801
100
RL_ON/PWR_ONOFF
C805
0.1uF
+5V_ST
16V
R838 R803
10K
100
MODULE_ON
C807
0.1uF
16V
Stand-by +3.3V
+5V_ST
IC802
AP2121N-3.3TRE1
VIN VOUT
3 2
1
C806
C802 C803 GND
10uF 0.1uF 10uF
16V 16V
+3.3V_AVDD
+5V
IC801
AP1117E33G-13
ADJ/GND
IN
3 1
2
OUT
C800 C801
C842
10uF
0.1uF
100uF
6.3V 16V
16V
+1.8V_DDR
+3.3V
IC800
AZ1085S-ADJTR/E1
INPUT OUTPUT
3 2
1
ADJ/GND
C878
C883
10uF 0.1uF
6.3V 16V
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.
POWER
Copyright © 2010 LG Electronics Inc. All rights reserved.
Only for training and service purposes
P800
SMAW200-H18S1
L801
MLB-201209-0120P-N2
1 2
3 4
5 6
L800
7 8 C813
MLB-201209-0120P-N2
10uF
16V
9 10
11 12
R804
13 14 0
C837
15 16 10uF
16V
17 18
19
+3.3V_ST
+3.3V_AVDD_MPLL
+3.3V_ST
R858
0
C815
0.1uF
16V
+3.3V_HDMI_ST
C892 C808
10uF 0.1uF
16V
6.3V 16V
R859
READY
0
C816
0.1uF
16V
320 mA
+3.3V_AVDD
+3.3V_AVDD
IC803
AP1117E18G-13
IN ADJ/GND
3 1
2
C814
OUT
0.1uF
16V
C811
C888
0.1uF
10uF
6.3V 16V C841
100uF
16V
450 mA
+1.8V_DDR
C880
C893 C877
10uF 10uF 0.1uF
6.3V
6.3V 16V
R861 READY
75
1%
P_17V
+5V
C818 P_+5V
C817
0.1uF
100uF
50V
25V
C890
C804 C820
10uF
470uF 0.1uF
6.3V
16V
READY
PSU_ERR_DET READY
C809
+5V_ST
16V
0.1uF
READY
C839
C835
C834
10uF
100uF 0.1uF
6.3V
16V
READY
AC_DET
RL_ON/PWR_ONOFF
C812
16V
0.1uF
R828
120K
+5V
C829
10uF
16V
S6 core 1.26 volt
50 mA
+1.8V_TU
L805
C822 C889 C827 C824 C825
10uF 0.1uF 0.1uF
10uF 100uF
6.3V 6.3V 16V 16V 16V
READY READY
MLB-201209-0120P-N2
Placed on SMD-TOP
+5V_ST +5V_ST P_+5V
C854
0.1uF
Q806
SI4925BDY
R856 R834
10K 10K
S1 1 8 D1_2
G1 2 7 D1_1
S2 3 6 D2_2
R835
560
Q803
C G2 4 5 D2_1
2SC3052
B
R829
10K
E
READY
L806
MLB-201209-0120P-N2
C826 C885
0.1uF
0.1uF
16V
16V
GND
IC804
AZ1085S-3.3TR/E1
+3.3V_CI
MAX 3A
L814
INPUT MLB-201209-0120P-N2
OUTPUT
3 2
$0.122
1
ADJ/GND
C852
0.1uF
16V
C831
0.1uF
GND
0
R862
C850
10uF
6.3V
GND
+5V_GENERAL
465 mA @85% efficiency
P_+5V
MAX 3A
R831
L802 Replaced Part
10K
READY
R827
10K C899 READY
R2 = R1/(Vout/0.8-1)
0.1uF
16V
IC805
READY MP2212DN
R824
50V
360K R1
100pF
C870
1%
FB EN/SYNC
1 8
R825 L813
R2
620K
3.6uH
GND SW_2
2 7
1%
NR8040T3R6N
IN SW_1
3 6
C843
10uF
6.3V
BS VCC
4 5 C830
C838
C898 0.01uF
10uF
10uF
50V
16V
16V
R830
10
C836
1uF
1%
10V
+5V
L817
C865
C862 C857
0.1uF
10uF 220uF
16V 16V 16V
+5V_GENERAL
L808
C864 C866
C858
10uF
0.1uF
220uF
16V
16V
16V
+3.3V_TU
C828
68uF
10V
40 mA
+3.3V
650 mA
C897 C844 C891
10uF
220uF 0.1uF
6.3V 6.3V
READY
GND
+1.26V_VDDC
TP1451
1600 mA
R802
0
1/4W
C OUT
C894 C896
C856
10uF 10uF
0.1uF
6.3V 6.3V
READY
MSD3368EV Platform
POWER 7 10
LGE Internal Use Only