LG 50PT350 Service Manual page 18

TU300
TDTJ-S001D
+5V_TU
ANT_PWR[OPT]
1
BST_CNTL
2
+B
3
C307
NC[RF_AGC] C304
4 0.1uF 22uF
16V 10V
AS
5
SCL
R313 22
6
SDA
R314 22
7
NC[IF_TP] C301
8
0.1uF
16V
SIF
9
NC
10
VIDEO
11
GND
+1.26V_TU +3.3V_TU
12
1.2V
13
3.3V
14
RESET
Close to Tuner
15
IF_AGC_CNTL
16
(Should be guarded by GND)
DIF_1
17
DIF_2
18
19 C300 C302
0.1uF 0.1uF
16V 16V
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 © 2011 LG Electronics Inc. All rights reserved.
Only for training and service purposes
H-NIM Tuner
+5V_TU
R341
R344
470
82
ISA1530AC1
Q300
+3.3V_TU
R338
4.7K
R326
R319
1.2K
1.2K
TU_SCL
+5V_TU
TU_SDA
C305 C306
10pF 10pF R345
R343 200
50V 50V
READY 0
READY
READY
E
+3.3V_TU
B
C
R335
10K +5V_TU
R334 100
TUNER_RESET
R342 R346
C308
200
0
IF_AGC_MAIN 0.1uF
READY EU
16V
IF_N_MSTAR
IF_P_MSTAR
- Should be guarded by GND
- No Via
- Width(Signal) : min 12mm
GND(Signal) : min 24mm
+3.3V
R370
10K
READY
C
R367
10K
B
Q303
AMP_MUTE
2SC3052
READY
READY
E
TU_SIF C331
0.1uF
50V
AC_DET
R365
2.2
R371
2K
C327
R349 0.1uF
C328
200 16V
4700pF
R366
50V
TU_CVBS
0
AUD_MASTER_CLK
C355
READY 22pF
50V
Q301 AUD_SCK
C356
ISA1530AC1
READY 22pF
50V
AUD_LRCK
READY
AUD_LRCH
READY
R348
200 AMP_RESET_N
EU
ATV_OUT
R359 2K
AMP_SDA
ISA1530AC1
R360 2K
Q302
EU
AMP_SCL
R372
10K
C329
0.1uF
50V
+3.3V
R809
R781 R807
2.2K 0 4.7K
P_SDA
Q701
2N7002(F)
+3.3V
R780 R806 R808
2.2K 0 4.7K
P_SCL
Q700
2N7002(F)
2D
R794 2D 0 R822
LVDS_DATA_2_E+
2D 2D
R795 0 R823
LVDS_DATA_2_E-
2D 2D
R796 0 R824
LVDS_DATA_2_D+
2D 2D
LVDS_DATA_2_D- R797 0 R825
2D 2D
R798 0 R826
LVDS_CLK_2+
R799 2D 0 2D
R827
LVDS_CLK_2-
2D 2D
R800 0 R828
LVDS_DATA_2_C+
R801 2D 0 R829 2D
LVDS_DATA_2_C-
2D 2D
R802 0 R830
LVDS_DATA_2_B+
2D
R803 2D 0 R831
LVDS_DATA_2_B-
2D 2D
R804 0 R832
LVDS_DATA_2_A+
2D
R805 2D 0 R833
LVDS_DATA_2_A-
R782 2D 0 2D
LVDS_DATA_1_E+ R810
2D 2D
R783 0 R811
LVDS_DATA_1_E-
R784 2D 0 2D
LVDS_DATA_1_D+ R812
2D 2D
R785 0 R813
LVDS_DATA_1_D-
R786 2D 0 R814 2D
LVDS_CLK_1+
2D 2D
R787 0 R815
LVDS_CLK_1-
2D
R788 2D 0 R816
LVDS_DATA_1_C+
2D 2D
R789 0 R817
LVDS_DATA_1_C-
2D
R790 2D 0 R818
LVDS_DATA_1_B+
2D 2D
R791 0 R819
LVDS_DATA_1_B-
2D 2D
R792 0 R820
LVDS_DATA_1_A+
2D 2D
R793 0 R821
LVDS_DATA_1_A-
@compC
R373
0
READY
19 18
EAPD/OUT4B OUT3A/FFX3A
20 17
R374
TWARN/OUT4A OUT3B/FFX3B
0
21 16
VDD_DIG_1 CONFIG
C335
22 15
0.1uF
GND_DIG_1 VDD
50V
23 14
R375
22 PWRDN GND_REG
24 13
VDD_PLL OUT1A
25 12
C333
FILTER_PLL GND1
680pF C336 1uF
50V
26 11
C337
GND_PLL VCC1
Close-by
Close-by
27 10
R376
22 XTI OUT1B
28 9
R377
22 BICKI OUT2A
C338 1uF
C357
29 8
C339
R378
22pF 22
LRCKI VCC2
50V
C358
30 7
22pF R379
22
SDI GND2
50V Close-by
31 6 P_17V
R380
22
RESET OUT2B
C334
32 5
R315 0.1uF
INT_LINE VCC_REG
22 50V
33 4
R316
SDA VSS
22
34 3
SCL TEST_MODE
35 2
GND_DIG_2 SA
Close-by
36 1
C332
VDD_DIG_2 GND_SUB
0.1uF
50V
[EP]GND
STA368BWG
IC303
LVDS
IR
+3.3V_ST
SDA_3.3V_MOD
R632
10K
KEY1
KEY2
LED_RED
+3.3V_ST
R633 R635
4.7K
4.7K
SUB_SCL
SCL_3.3V_MOD
SUB_SDA
+3.3V_ST
0
TE2P
0
TE2N
0
TD2P
0
TD2N
0
TCLK2P
0
TCLK2N
0
TC2P
0
TC2N
0
TOUCH_VER_CHK
TB2P
0
TB2N
0
TA2P
0
TA2N
0
TE1P
0
TE1N
0
TD1P
0
TD1N
0
TCLK1P
0
TCLK1N
0
TC1P
0
TC1N
0
TB1P
0
TB1N
0
TA1P
0
TA1N
Audio AMP
L302
R381 C347 C351
10.0uH
20 0.22uF 1000pF
50V 50V
C345
25V 0.22uF
C342 50V
C348 C352 4
0.1uF 50V 330pF
L303 0.22uF 1000pF
50V
10.0uH
50V 50V
3
L304 2
C343
10.0uH
25V C349 C353
330pF
50V 0.22uF 1000pF
0.1uF 50V C346 1
50V 50V
0.22uF
50V
R382 C350 C354
20 L305 0.22uF 1000pF
10.0uH
50V 50V
C340
C341
C344
0.1uF
68uF
68uF
50V
35V
35V
READY
Key/IR
P602
12507WS-15L
1
C648
10pF
2
R634 R628 R639
10K 10K 10K
3
4
C 5
R629
ZD601
4.7K
B Q602 5.6B
2SC3052
6
E
R630
22
7
R631
22
8
C645 C649
10pF 10pF
9
READY READY
10
C646
0.1uF
11
16V
12
13
14
15
16
GP2R_S7R
2010-08-31
Tuner/Audio Amp
LVDS / Key-IR 3
LGE Internal Use Only