Read LG 50PM4700-UA / 50PM4700-UB (CHASSIS:PU22A) Service Manual online
THERMAL
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.
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.
DCDC_GND
IC1200
A8290SETTR-T
S
1
BOOST
3
TCAP
7
TDI
9
VREG
10
SDA
11
ADD
12
SCL
13
NC_2
14
IRQ
15
NC_3
16
NC_4
17
NC_5
18
NC_6
19
BFC
20
NC_7
21
NC_8
22
BFO
23
NC_9
24
BFI
25
VIN
26
LX
27
GNDLX
28
LNB
5
TDO
8
GND
6
EXTM
4
NC_1
2
VCP
29
[EP]
C1200
0.22uF
25V
S
C1201
1uF
50V
1uF
50V
S
I2C_SDA4
C1204
0.1uF
50V
0.1uF
50V
S
A_GND
LNB_OUT
A_GND
R1203
33
S
D1203
40V
SMAB34
S
LNB_TX
DCDC_GND
C1210
27pF
OPT
C1207
22000pF
S
R1202
33
S
R1201
0S
0S
C1208
0.01uF
50V
0.01uF
50V
S
+3.3V_MULTI
I2C_SCL4
A_GND
A_GND
C1209
0.22uF
S
A_GND
A_GND
A_GND
R1204
0
OPT
DCDC_GND
C1213
0.1uF
50V
0.1uF
50V
S
A_GND
L1200
33UH
SP-7850_33
S
D1202
40V
SMAB34
S
R1200
0S
0S
DCDC_GND
C1205
0.1uF
S
R1205
4.7K
S
D1201
40V
SMAB34
S
C1211
27pF
OPT
+12V_LNB
A_GND
C1202
68uF
35V
68uF
35V
S
C1203
68uF
35V
35V
S
D1200
30V
MBR230LSFT1G
S
C1212
10uF
16V
S
close to VIN pin(#25)
close to Boost pin(#1)
PCB_GND and A_GND are connected
DVB-S2 LNB Part_Allegro
DCDC_GND and A_GND are connected
DCDC_GND and A_GND are connected in pin#27
2.4A
3A
2A
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