LG 55G2 Service Manual page 52

CORE +1.26V_FRC
+12V
L9802
BLM18PG121SN1D
+3.3V_FRC
C9802
10uF
10K
16V
R9813
POWER_ON/OFF2_2
OPT
R9806
R9814
10K
330K
OPT
R1
R9801 R9803
6.8K 1K
1% 1%
C9804
100pF
50V
R2
Switching freq: 700K
+3.3V_FRC
+12V
L9801
BLM18PG121SN1D
C9801
10uF
16V
POWER_ON/OFF2_2
R9805
10K
R1
R9802 R9804
33K 220
1%
1%
C9803
27pF
50V
R9807
R2 10K C9805
1uF
1%
10V
Switching freq: 700K
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 ⓒ 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
TYPICAL 980mA +1.26V_FRC
IC9802
TPS54327DDAR
[EP]GND
C9821
EN VIN
1uF
1 8
10V
C9810
VFB VBST
2 7
0.1uF L9804
16V
3.6uH
VREG5 SW
3 6
NR8040T3R6N
SS GND
3A
4 5
C9806 C9808
1uF 3300pF
10V 50V
Vout=0.765*(1+R1/R2)
+3.3V_FRC
TYPICAL 300mA
IC9801
TPS54327DDAR
[EP]GND
EN VIN
1 8
C9809
VFB VBST
2 7
0.1uF L9803
16V
3.6uH
VREG5 SW
3 6
NR8040T3R6N
SS GND
3A
4 5
C9807
3300pF
50V
Vout=0.765*(1+R1/R2)
+3.3V_FRC
C9815 C9816
10uF 0.1uF
10V 16V
OPT
C9812
C9814
22uF
22uF
10V 10V
+1.5V of DDR&URSA5 uses same power line
OPT
C9811
C9813
22uF
22uF
10V
10V
+1.5V_FRC
TYPICAL 350mA
IC9803
AP7173-SPG-13 HF(DIODES)
[EP]
1 8
OUT
IN
2 7
PG FB
3 6
SS
VCC
R9809
10K
4 5
GND
EN
EAN41406705
C9817
1uF
10V
Vout=0.6*(1+R1/R2)
LG1152
URSA5 Power Block
+1.5V_FRC_DDR
R1
R9810
4.3K
1%
R9811
3.9K
1%
R2
C9818 R9812 C9819 C9820
560pF 1K 10uF 10uF
50V 1% 16V 16V
2011. 10. 31
LGE Internal Use Only