Read LG 42PG3HD-UA (CHASSIS:PU84A) Service Manual online
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Power flow diagram
IC100
LGE1854C
+3.3V_VDDP
+3.3V_AVDD_MPLL
+3.3V_AVDD_OTG
+3.3V_AVDD_ADC
+3.3V_AVDD_DVI
+3.3V_AVDD_SIF
+3.3V_AVDD_AU
+3.3V_AVDD_MEMPLL
+3.3V_AVDD_LPLL
TU400
LGIT TUNER
IC105
Flash Memory
S25Fl064A
IC200, 201
DDRAM
HY5DU561622FTP*2ea
IR
IC102
NVRAM
AT24C512W
Regulator
IC
16V_AUDIO
IC703
MP2305DS
+5V_TUNER
12V
Q706
SI3865BDV
+5V_GENERAL
+5V_ST
IC708
AZ1117H-
3.3V
+3.3V_MULTI
IC706
AZ1085S
+2.6V_MVDD
+2.6V_VDD_DDR
IC705
AZ1085S
+3.3V_VDDP_ST
IC709
AZ1085S-Adj
+1.25V
IC702
SC156515M
+3.3V_PVSB
IC701
SC4215IS
+1.2V_PVSB
IC715
M62320FP
IC805
AZ1117-3.3V
IC803
TMDS351PA
G
+3.3V_MST
IC801,2,4
AT24C02*3ea
IC601
STMAV340
IC602
74HC4066
IC603
MAX3232
IC604
AT24C02
IC502
NTP3000A
IC501
AZ1117H-
1.8V
+1.8V_NTP
+1.25V_AVDD_DVI
+1.25V_VDDC
IC104
Reset triger
74LVC14APW
1
2
17
5
6
19
20
9
4
8
12
16V
12V
5VST
AC_DET
VAVS_ON
M5V_ON
GND
5V_MNT
RL_ON
18
21
3
7
14
16
13
15
+2.6V_VDD_DDR
+1.25V_VDDC
+1.25V_AVDD_DVI
$0.3
$0.1
$0.3
$0.07
$0.26
$0.08
$0.13
$0.13
$1.36
$4.5
$0.05
$0.13
$0.35
$0.05
$0.07
$1.31
$0.13
$0.06
$0.82
$7.9
$
IC400
LGDT3304
+3.3V_DVDD
+3.3V_AVDD
+1.2V_DVDD
$2.55
$0.2
$0.05
$0.74
USB
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