LG 55LF5950 Service Manual page 33

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.
Copyright 2015 LG Electronics Inc. All rights reserved.
Only for training and service purposes
TU_ALL
R6501
0
1 +3.3V_LNA_TU
C6500
0.1uF
TU_ALL
Removed RF Switch(2Pin) 2
3 IF_AGC_TU
4
I2C_SCL2_TU
5
I2C_SDA2_TU
6 IF_P_TU
TU_ALL_IntDemod
7
IF_N_TU
TU_ALL_IntDemod
8 TU_SIF_TU
9
TU_CVBS_TU
10
11 +3.3V_TU
12 FE_DEMOD1_TS_ERROR
14
FE_DEMOD1_TS_CLK
15
FE_DEMOD1_TS_SYNC
16 FE_DEMOD1_TS_VAL
17 FE_DEMOD1_TS_DATA[0]
FE_DEMOD1_TS_DATA[1]
18
FE_DEMOD1_TS_DATA[2]
19
20 FE_DEMOD1_TS_DATA[3]
21 FE_DEMOD1_TS_DATA[4]
FE_DEMOD1_TS_DATA[5]
22
23 FE_DEMOD1_TS_DATA[6]
24 FE_DEMOD1_TS_DATA[7]
25 /TU_RESET1_TU
26 +3.3V_DEMOD_TU
27
I2C_SCL4_TU
28
29
LNB_TX
30
I2C_SDA4_TU
31
LNB_OUT
1. should be guarded by ground
2. No via on both of them
3. Signal Width >= 12mils
close to Tuner
Signal to Signal Width = 12mils
+3.3V_TUNER
close to Tuner
TU_ALL_IntDemod
R6506
10K IF_AGC
TU_ALL_IntDemod
C6502
0.047uF
25V
TU_W_BR/TW
TU_ALL
R6513-*1
R6513
33 200
I2C_SCL2
C6507
R6514-*1
I2C_SDA2
47pF
R6514 200
50V
33
C6503 TU_ALL TU_ALL TU_W_BR/TW
47pF
50V
TU_ALL
R6502
10
IF_P
C6504
33pF
should be guarded by ground,Match GND VIA
R6503
10 TU_ALL_IntDemod
IF_N
C6505
33pF
TU_ALL_IntDemod
+3.3V_TUNER
TU_M/W
R6504
0
C6509
0.1uF
TU_M/W
close to Tuner
FE_DEMOD1_TS_ERROR
FE_DEMOD1_TS_CLK
FE_DEMOD1_TS_SYNC
FE_DEMOD1_TS_VAL
FE_DEMOD1_TS_DATA[0]
FE_DEMOD1_TS_DATA[1]
FE_DEMOD1_TS_DATA[2]
FE_DEMOD1_TS_DATA[3]
FE_DEMOD1_TS_DATA[4]
FE_DEMOD1_TS_DATA[5]
FE_DEMOD1_TS_DATA[6]
FE_DEMOD1_TS_DATA[7]
TU_M/W
R6505
TU_M/W 100 /TU_RESET1 +3.3V_TUNER
C6508
16V TU_M/W
R6507
0.1uF
TU_M/W
0
C6510
0.1uF
R6509 33
I2C_SCL4
TU_M/W
OPT
C6512
18pF
50V
OPT
R6508 33
I2C_SDA4
LNB_TX
C6511
TU_M/W
18pF
50V
LNB_OUT
+3.3V_NORMAL
+3.3V_TUNER
Ground Width >= 24mils
TU_ALL C6501
22uF
10V
85C
+3.3V_TUNER
1608 perallel
because of derating
TU_ALL_2178B
C6513
TU_ALL_2178B
TU_SIF_TU 0.1uF TU_ALL_2178B
R6510 R6511
16V 200
200
TU_CVBS
E
CVBS_TR_NXP
E
B
Q6500
CVBS_TR_KEC
MMBT3906(NXP)
Q6500-*1
C
B 2N3906S-RTK
C
A5LR_Bring_Up
TUNER_1
FE_DEMOD1_TS_ERROR
TU_SIF_TU
2014.11.01
65
LGE Internal Use Only