LG 22LN45 Series Service Manual page 31

NETCAST4.0 EU(DVB-T/C)_TUNER_BLOCK
TU2600
TDSS-G501D
NC
1
RESET
2
SCL
3
SDA
4
3.3V
5
ALIF_[N]
6
1.8V
7
ALIF_[P]
8
IF_AGC
9
DLIF_[P]
10
DLIF[N]
11
B1 A1
B1 A1
12
SHIELD
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 © 2013 LG Electronics. Inc. All rights reserved.
Only for training and service purposes
RF_SW_OPT
R2603
0
RF_SWITCH_CTL
+3.3V_TU
Close to TUNER
C2603
0.1uF
16V
RF_SW_OPT
R2614
100K
R2611
12.08.14
100
diagonal noise improve
TUNER_RESET
OPT
C2624
C2622
0.1uF
0.1uF
16V TU_I2C_FILTER
16V
R2609-*1
MLG1005SR27JT
+3.3V_TU
TU_I2C_FILTER
R2610-*1
MLG1005SR27JT
R2870 R2871
1K 1K
TU_I2C_NON_FILTER
R2609 33
TU_SCL
+3.3V_TU
TU_I2C_NON_FILTER
R2610 33
TU_SDA
C2607 C2612
C2651 C2652
20pF 20pF
20pF 20pF
50V 50V
50V 50V
C2623
C2621 C2628
100pF 0.1uF 100uF
+1.8V_TUNER
50V 16V 16V
OPT
C2627
C2602 C2604
100pF 0.1uF 100uF
16V
50V 16V
OPT
IF_AGC_MAIN
R2635
680
R2608 NON_A_DEMODE
C2600 should be guarded by ground
0
0.1uF
16V R2602
0
R2601
0
+3.3V_TU
+3.3V_TU
A_DEMODE
A_DEMODE
R2618
R2619
470
82
close to TUNER
TU_SIF
R2624 R2625
E
220 220
C2626 A_DEMODE
Q2600 A_DEMODE A_DEMODE
A_DEMODE MMBT3906(NXP)
0.1uF B
16V R2616
C
A_DEMODE 4.7K
E
R2638 0
Q2601
A_DEMODE
A_DEMODE MMBT3906(NXP)
B
C
R2637
680
R2636 NON_A_DEMODE
2K
NON_A_DEMODE
IF_P_MSTAR
IF_N_MSTAR
TU_CVBS
DEMOD_RESET
This was being applied to the only china demod,
so this has to be deleted in both main and ISDB sheet.
IF_AGC_SEL
LNA2_CTL
+3.3V_TU
+3.3V_TUNER
L2606
CIS21J121
C2643 C2646 C2648
C2644
22uF 0.1uF 22uF 0.1uF
10V 16V 10V 16V
NC4_S7LRM
TUNER_EU
EAX65077401
2012.09.15
26 12
LGE Internal Use Only