LG 55UF6800 Service Manual page 37

LM14A CPU
+12V
L2502
PZ1608U121-2R0TF
Placed on SMD-TOP
UF64/68 UF64/68 UF77
UF77
C2510-*1
C2512-*1 C2510 C2512 C2513
10uF 10uF 10uF 0.1uF
10uF
16V 16V 16V
25V 25V OPT
R2519-*1
27K
CPU_VID_LM14_A0
1/16W
1%
+3.3V_NORMAL +3.3V_NORMAL
R2513 D R2517 D
10K 10K
R2514 R2518
G G
CPU_VID0 CPU_VID1
S S
0 5% 0 5%
D D
Q2502-*1 Q2503-*1
G G
2N7002K 2N7002K
S S
DIODEDS_CPU_CORE_VID_FET(SUB) DIODEDS_CPU_CORE_VID_FET(SUB)
THE SYMBOL MARK OF THIS SCHEMETIC DIAGRAM INCORPORATES
SPECIAL FEATURES IMPORTANT FOR PROTECTION FROM X-RADIATION.
FIRE AND ELECTRICAL SHOCK HAZARDS, WHEN SERVICING IF IS
ESSENTIAL THAT ONLY MANUFACTURES SPECIFIED PARTS BE USED FOR
THE CRITICAL COMPONENTS IN THE SYMBOL MARK OF THE SCHEMETIC.
+1.1V_VDDC_CPU
R1
IC2502
C2514
TPS54427DDA
[EP]GND
100pF
10K
50V
R2524
EN VIN 16V
1 8 0.1uF
C2517
POWER_ON/OFF2_4
VFB VBST
2 7 L2503
2.2uH
R2 VREG5 SW
3 6
PS064T-2R2MS
SS GND
4 4A 5
C2519
C2518
22uF
22uF
10V
10V
DCDC_DIODE_0DR050008AA(SEMTECH)
0DR050008AA
C2515 C2516
ZD2501-*1
1uF 2200pF
10V 50V
LM14_A1
LM14_A0
R2-1 R2-2
V_out
V_out
Boot High 1.06
High 1.163
Kernel
High Low 1.01 1.013
Kernel Low Low 0.96 0.969
Vout=0.765*(1+R1/R2)
LM14A CORE
+12V
IC2501
L2501
L2500 BD86106EFJ
2uH
EAN62653301
PZ1608U121-2R0TF [EP]
PGND SW_2
1 8
Placed on SMD-TOP
VIN SW_1 OPT
2 7
OPT
C2504 C2505 C2506
AGND EN 0.0068uF
C2500 C2501 C2502 3 6 10uF 10uF
R2500 50V
10uF 10uF 0.1uF 6.8K 10V 10V
FB 6A COMP
25V 25V 25V 4 5
POWER_ON/OFF2_4
R2501
C2503 10K
0.1uF
16V
+3.3V_NORMAL
LM14A_A0_ONLY
CORE_VID0
LM14_A1 LM14_A0
V_out
V_out Delete this part when LM14A0 used all.
Boot 0.98 1.15
Kernel
0.98 0.98
Vout=0.8*(1+R1/R2)
MAX 3A
OPT OPT
R2510
C2508 C2509 15K
C2507
10uF 10uF 1%
100uF
10V 10V C2511
47pF
50V
R2-1.13V
LM14A_A0_ONLY
R2504
15K
1%
LM14A_A0_ONLY
R2505
56K
1%
R2502 D
10K DCDC_DIODE_0DR050008AA(SEMTECH)
0DR050008AA
R2503
G ZD2500-*1
0 5% S
LM14A_A0_ONLY
D
Q2500-*1
G
2N7002K
S
DIODEDS_CPU_CORE_VID_FET
LM14A1 CORE_VID1 NOT USE.
CORE_VID1
LM14A
LM15U_PWR_2_ALL
+1.1V_VDDC
R1
R2
BSD-15Y-LM14A-025_00-HD
2015-01-21
25