DOWNLOAD LG 42LA6900 (CHASSIS:LC33B) Service Manual ↓ Size: 10.53 MB | Pages: 122 in PDF or view online for FREE

Model
42LA6900 (CHASSIS:LC33B)
Pages
122
Size
10.53 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42la6900-chassis-lc33b.pdf
Date
PREV: LG 42LA6800-CA.AHK (CHASSIS:LC33B) Service Manual

LG 42LA6900 (CHASSIS:LC33B) Service Manual ▷ View online

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.
+5V_CI_ON
+5V_NORMAL
R6217
100
CI
C6210
1uF
25V
CI
R6218
10K
CI
PCM_5V_CTL
IC6200
AP2151WG-7 
CI
3
FLG
2
GND
4
EN
1
OUT
5
IN
R6219
10K
CI
62
CI SLOT
2011.10.31
CI POWER ENABLE CONTROL
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.
SIGN630028
P6300
10057542-1311FLF(B CAS Slot)
JAPAN
C1
VCC
C2
RST
C3
CLK
C4
RESERVED_1
C5
GND
C6
VPP
C7
I/O
C8
RESERVED
S1
SW1
S2
SW2
C6301
10uF
10V
JAPAN
R6301
2.7K
JAPAN
ZD6300
5V
JAPAN
SMARTCARD_VCC/SD_EMMC_CMD
R6302
OPT
R6310
22
JAPAN
C6304
0.1uF
16V
JAPAN
+3.3V_NORMAL
SMARTCARD_PWR_SEL/SD_EMMC_DATA[1]
R6315
1.2K
JAPAN
SMARTCARD_RST/SD_EMMC_DATA[2]
R6316
1.2K
JAPAN
R6300 22
JAPAN
R6305
2.7K
JAPAN
IC6300
TDA8024TT
JAPAN
3
5V/3V
2
CLKDIV2
4
PGND
1
CLKDIV1
6
VDDP
5
S2
7
S1
8
VUP
9
PRES
10
PRES
11
I/O
12
AUX2
13
AUX1
14
CGND
15
CLK
16
RST
17
VCC
18
PORADJ
19
CMDVCC
20
RSTIN
21
VDD
22
GND
23
OFF
24
XTAL1
25
XTAL2
26
I/OUC
27
AUX1UC
28
AUX2UC
R6309
22
JAPAN
+3.3V_NORMAL
C6300
0.1uF
16V
JAPAN
C6303
0.1uF
16V
JAPAN
L6300
BLM18PG121SN1D
JAPAN
R6312
10K
JAPAN
R6311
22
JAPAN
SMARTCARD_DATA/SD_EMMC_CLK
C6307
0.33uF
16V
JAPAN
+5V_NORMAL
R6303
OPT
+3.3V_NORMAL
+3.3V_NORMAL
R6304
2.7K
JAPAN
R6306
OPT
R6314
1K
JAPAN
C6306
0.1uF
16V
JAPAN
R6308
22
JAPAN
SMARTCARD_DET/SD_EMMC_DATA[3]
L6301
BLM18PG121SN1D
JAPAN
R6307
22
JAPAN
C6302
0.1uF
16V
JAPAN
R6313
75
JAPAN
ZD6301
5V
JAPAN
SMARTCARD_CLK/SD_EMMC_DATA[0]
C6305
0.1uF
16V
JAPAN
R6317
1.2K
JAPAN
R6318
1.2K
OPT
R6319
1.2K
OPT
CI SLOT
2011.04.17
62
Place CLK C3 far from C2,C7,C4 and C8
75 ohm in I/O is for short circuit Protection
B-CAS SLOT
  INT    CMDVCC  :     STATUS
---------------------------------
  HIGH    HIGH      CARD PRESENT
  LOW     HIGH      CARD not PRESENT
CLKDIV1  CLKDIV2  : F_CRD_CLK
-----------------------------
   1        0        CLKIN
B-CAS (SMART CARD) INTERFACE
THERMAL
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.
FE_DEMOD1_TS_DATA[1]
FE_DEMOD1_TS_DATA[0]
FE_DEMOD1_TS_DATA[5]
FE_DEMOD1_TS_DATA[3]
FE_DEMOD1_TS_DATA[2]
FE_DEMOD1_TS_DATA[7]
FE_DEMOD1_TS_DATA[4]
FE_DEMOD1_TS_DATA[6]
RF_SWITCH_CTL_TU
+1.23V_D_Demod
C6515
0.1uF
TU_Q/W
/TU_RESET2
/S2_RESET
C6542
0.1uF
I2C_SCL6_TU
+1.23V_D_Demod
C6529
22uF
10V
85C
+3.3V_TU
R6508
100
TU_S/N/Q/W
R6515
4.7K
OPT
C6550
0.1uF
16V
TU_W_BR/TW/CO
R6527
20K
1%
TU_Q/N/M/W
I2C_SDA6_TU
IF_P
R6521
200
TU_A_GLOBAL_6/7
Q6500
MMBT3906(NXP) 
OPT
E
B
C
I2C_SDA4_TU
C6522
0.1uF
16V
OPT
C6554
100pF
50V
+1.8V_TU
Power_D_Demod_TU
TUNER_SIF_TU
L6503
BLM18PG121SN1D
IF_AGC_TU
+3.3V_TU
+1.8V_TU
LNB_TX
FE_DEMOD1_TS_DATA[0]
/TU_RESET1
TUNER_SIF
+1.23V_D_Demod_TU
FE_DEMOD1_TS_SYNC
FE_DEMOD1_TS_VAL
+3.3V_TU
C6500
18pF
50V
TU_Q/W_KR/BR/CO/TW_H
+3.3V_TU
FE_DEMOD1_TS_ERROR
R6520
200
TU_A_GLOBAL_6/7
R6529
10K
1%
TU_Q/N/M/W
0.1uF
C6540
TU_Q/N/M/W
I2C_SDA6
+3.3V_TU
L6508
BLM18PG121SN1D
TU_Q/W_KR/BR/TW/CO/JP
RF_SWITCH_CTL_50
FE_DEMOD1_TS_CLK
R6500 1K
TU_N/M_TW/BR
FE_DEMOD1_TS_DATA[7]
FE_DEMOD1_TS_ERROR
+3.3V_TU
FE_DEMOD1_TS_DATA[1]
TU_+1.8V_TU
C6504
18pF
50V
TU_Q/W_KR/BR/CO/TW_H
FE_DEMOD1_TS_DATA[4]
FE_DEMOD1_TS_DATA[5]
RF_SWITCH_CTL_50
+3.3V_NORMAL
R6506
100
TU_S/N/Q_T/US/KR/TW
IF_AGC
FE_DEMOD1_TS_DATA[0-7]
+3.3V_TU
R6516
470
OPT
+3.3V_TU
IF_N
C6521
0.1uF
OPT
CN_RESET_TU
C6526
0.1uF
16V
R6518
82
OPT
R6534
0
TU_A_GLOBAL_6/7
FE_DEMOD1_TS_DATA[6]
R6503
22
TU_Q/W
LNB_OUT
C6520
0.1uF
16V
TU_S/N/Q/W
RF_SWITCH_CTL
L6501
BLM18PG121SN1D
TU_Q/W
+1.8V_TU
L6502
BLM18PG121SN1D
TU_N/M_CN/BR
IF_N
I2C_SCL6
+3.3V_TU
R6528
11K
1%
TU_Q/N/M/W
L6500
BLM18PG121SN1D
FE_DEMOD1_TS_DATA[2]
C6530
0.1uF
16V
C6501
0.1uF
TU_N_TW/BR
IC6501
AP2132MP-2.5TRG1
EAN61387601
TU_Q/N/M/W
3
VIN
2
EN
4
VCTRL
1
PG
5
NC
6
VOUT
7
ADJ
8
GND
9
[EP]
FE_DEMOD1_TS_ERROR
IF_P
FE_DEMOD1_TS_SYNC
TU_CVBS
C6538
10uF
10V
+3.3V_TU
+3.3V_TU
FE_DEMOD1_TS_VAL
L6507
BLM18PG121SN1D
TU_Q/W_KR/BR/TW/CO/JP
Q6501
MMBT3906(NXP) 
TU_A_GLOBAL_6/7
E
B
C
I2C_SCL4_TU
R6513
10
TU_Q
I2C_SCL4
I2C_SDA4
+3.3V_TU
R6508-*1
1K
5%
TU_N/M/W_CN/TW/BR/CO
C6503
0.1uF
16V
TU_S/N/Q_T/US/KR/TW
R6502
10
TU_N/M
/S2_RESET_TU
R6510
33
FE_DEMOD1_TS_DATA[3]
LNB_OUT
R6531
1
C6531
0.1uF
LNB_TX
/S2_RESET
+1.23V_D_Demod
C6516
0.1uF
16V
TU_N/M/Q/W_KR/CN/BR/JP
IC6503
AZ1117BH-1.8TRE1
1
ADJ/GND
2
OUT
3
IN
+5V_NORMAL
FE_DEMOD1_TS_CLK
TU_CVBS_TU
R6509
33
C6535
1uF
TU_Q/N/M/W
R6504
22
TU_Q/W
+3.3V_TU
/TU_RESET1_TU
R6523
10K
TU_Q/N/M/W
C6549
10uF
10V
TU_Q/N/M/W
C6533
10uF
10V
TU_Q/N/M/W
C6546
10uF
10V
C6548
10uF
10V
R6505
10K
TU_N/M_TW/BR
C6506
47pF
50V
TU_N/Q/W_KR/TW/BR/CO_H
C6508
47pF
50V
TU_N/Q/W_KR/TW/BR/CO_H
R6502-*1
1K
5%
TU_N_BR
C6502
0.1uF
TU_M/W_BR/TW/CO/CN
R6501 1K
TU_M/W_BR/TW/CO/CN
R6513-*1
1K
5%
TU_W_BR/TW/CO/JP
R6506-*1
100
TU_W_BR/TW
C6514
0.1uF
16V
TU_W_BR/TW/CO
C6503-*1
0.1uF
16V
TU_W_BR/TW
C6516-*1
0.1uF
16V
TU_W_BR/TW/CO
65
TUNER
2012.07.10
T2 : Max 1.7A
6
11
14
12
1608 perallel 
because of derating
close to Tuner
25
mA(MAX)
7
27
26
2
3
30
Signal to Signal Width = 12mils
22
Ground Width >= 24mils
23
33
close to TUNER
13’ Tuner Type for Global 
TDS’S’-G501D : T/C Half NIM Horizontal Type
TDS’Q’-G501D : T/C/S2 Combo Horizontal type
TDS’Q’-G601D : T2/C/S2 Combo Horizontal Type
TDS’Q’-G651D : T2/C/S2 Combo Vertical Type
TDS’M’-C601D : China NIM with Isolater Type
TDS’W’-J551F : Japan Dual NIM
TDS’W’-B651F : Brazil 2Tuner
TDS’W’-A651F : Taiwan 2Tuner
TDS’W’-K651F : Colombia DVB-T2 2Tuner
18
16
Global F/E Option Name
1. TU
2. Tuner Name = TDS’S’,TDS’Q’...
3. Country Name = T,T2,S2,KR,US,BR ...
Example of Option name
TU_Q_T2 = apply TDSQ type tuner and T2 country 
TU_M/W = apply TDSM&TDSW Type Tuner 
else : Max mA
36
8
24
CHB : Max mA
21
1. should be guarded by ground
31
R2
Close to the tuner
R1
35
close to TUNER
9
Vout=0.6*(1+R1/R2)
4
19
2A
should be guarded by ground
3. Signal Width >= 12mils
close to Tuner
34
17
1
2. No via on both of them
5
10
32
20
13
else : Max 0.7A
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.
TUNER_SIF_TU
C6601
0.1uF
16V
TU_W
FE_DEMOD1_TS_DATA[1]
FE_DEMOD1_TS_DATA[3]
TU_+1.8V_TU
LNB_OUT
+3.3V_TU
I2C_SCL6_TU
TUNER_SIF_TU
I2C_SCL6_TU
C6602
0.1uF
TU_M/W
TU_CVBS_TU
R6610
0
TU_W
I2C_SDA6_TU
IF_N
TU_GND_B
I2C_SDA6_TU
+3.3V_TU
+3.3V_TU
R6608
0
TU_W
FE_DEMOD3_TS_DATA
FE_DEMOD1_TS_SYNC
FE_DEMOD1_TS_DATA[0]
TUNER_SIF_TU
I2C_SCL4_TU
I2C_SCL6_TU
FE_DEMOD1_TS_ERROR
LNB_TX
FE_DEMOD2_TS_VAL
+3.3V_TU
FE_LNA_Ctrl2
R6606
0
TU_S/N/Q/W
TU_PIN2
R6611
0
TU_W
TUNER_SIF_TU
R6604
0
TU_S/N/Q/W
+3.3V_TU
TU_GND_A
TU_+1.8V_TU
TU_+1.8V_TU
FE_DEMOD2_TS_ERROR
C6600
0.1uF
16V
TU_W
FE_DEMOD1_TS_DATA[2]
R6607
0
TU_S/N/Q/W
LNB_OUT
I2C_SDA4_TU
FE_DEMOD3_TS_CLK
FE_DEMOD1_TS_CLK
R6609
0
TU_W
Power_D_Demod_TU
FE_DEMOD2_TS_SYNC
R6612
0
TU_Q
RF_SWITCH_CTL_50
FE_DEMOD1_TS_DATA[4]
FE_DEMOD1_TS_DATA[5]
FE_DEMOD1_TS_DATA[6]
FE_DEMOD3_TS_ERROR
I2C_SDA6_TU
IF_AGC_TU
I2C_SCL6_TU
TU_GND_A
CN_RESET_TU
TU_GND_B
FE_DEMOD3_TS_VAL
TU_GND_B
R6605
0
TU_S/N/Q/W
+3.3V_TU
R6602
100
TU_M/W
RF_SWITCH_CTL_TU
FE_DEMOD3_TS_SYNC
FE_DEMOD2_TS_CLK
FE_DEMOD1_TS_DATA[7]
FE_DEMOD2_TS_ERROR
TU_GND_A
FE_LNA_Ctrl1
LNB_TX
TU_PIN2
/TU_RESET1_TU
FE_DEMOD2_TS_DATA
TU_GND_B
I2C_SDA6_TU
RF_SWITCH_CTL_50
+1.23V_D_Demod_TU
/TU_RESET2
FE_DEMOD3_TS_ERROR
TU_+1.8V_TU
FE_DEMOD1_TS_VAL
/S2_RESET_TU
IF_P
TU_PIN2
TU_GND_B
R6601
10K
TU_W
R6600
10K
TU_W
TU6601-*1
TDSQ-G601D(B) 
TU_Q_T2/S2
1
NC_1
2
RESET
3
SCL
4
SDA
5
+B1[3.3V]
6
SIF
7
+B2[1.8V]
8
CVBS
9
NC_2
10
NC_3
11
NC_4
12
NC_5
13
NC_6
14
NC_7
15
GND_1
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
GND_2
29
GND_3
30
+B3[1.23V]
31
DEMOD_RESET
38
SHIELD
32
+B4[3.3V]
33
F22_OUTPUT
34
DEMOD_SCL
35
DEMOD_SDA
36
LNB
37
GND_4
A1
A1
B1
B1
TU6600
TDSS-G501D(B) 
TU_S_T
5
3.3V
11
DLIF_[N]
2
RESET
10
DLIF_[P]
4
SDA
1
NC_1
9
IF_AGC
8
NC_3
3
SCL
7
1.8V
6
NC_2
12
SHIELD
A1
A1
B1
B1
TU6503
TDSM-C601D(B) 
TU_M_CN
8
CVBS
9
NC_1
10
NC_2
11
NC_3
12
+B3[3.3V]
13
+B4[1.23V]
14
DEMOD_RESET
15
GND
16
NC_4
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
RF_S/W_CTL
50
RESET
51
SHIELD
59
SIF
55
+B1[3.3V]
54
SDA
53
SCL
52
+B2[1.8V]
56
A1
A1
A2
A2
B1
B1
B2
B2
TU6601
TDSQ-G501D(B) 
TU_Q_T/S2
1
NC_1
2
RESET
3
SCL
4
SDA
5
+B1[3.3V]
6
NC_2
7
+B2[1.8V]
8
NC_3
9
IF_AGC
10
DIF[P]
11
DIF[N]
12
NC_4
13
NC_5
14
NC_6
15
GND_1
16
ERROR
17
SYNC
18
VALID
19
MCLK
20
D0
21
D1
22
D2
23
D3
24
D4
25
D5
26
D6
27
D7
28
GND_2
29
GND_3
30
+B3[1.23V]
31
DEMOD_RESET
38
SHIELD
32
+B4[3.3V]
33
F22_OUTPUT
34
DEMOD_SCL
35
DEMOD_SDA
36
LNB
37
GND_4
A1
A1
B1
B1
TU6602
TDSW-J501F(B) 
TU_W_JP
1
+5V_OR_+3.3V_SPLITTER
2
RESET_T1
3
SCL_T
4
SDA_T
5
+3.3V_T1
6
NC_1
7
+1.8V_T1
8
NC_2
9
NC_3
10
NC_4
11
NC_5
12
+3.3V_T2
13
+1.8V_T2
28
GND_2
29
GND_3
30
+B5[1.23V]
31
D_RESET
36
LNB
32
+B6[3.3V]
33
GND_4
34
D_SCL
35
D_SDA
GND_5
37
GND_6
38
GND_7
39
TS1_ERROR
40
TS1_SYNC
41
TS1_VALID
42
TS1_MCLK
43
TS1_DATA
44
TS2_ERROR
45
TS2_SYNC
46
TS2_VALID
47
TS2_MCLK
48
TS2_DATA
49
NC_6
50
RESET_T2
51
LNA_CTRL_1
57
LNA_CTRL_2
58
SHIELD
59
NC_7
55
+3.3V[S_TUNER]
54
SDA_S
53
SCL_S
52
NC_8
56
A1
A1
B1
B1
C6603
1000pF
TU_M_CN
C6604
1000pF
TU_M_CN
66
TU_SYMBOL_EU_M
2012.07.10
52
50
9
31
13
3
33
46
26
11
58
49
18
12
19
27
22
GND seperation for CHINA tuner
53
56
7
55
6
23
20
42
30
41
34
40
25
57
35
48
21
44
24
32
16
45
4
10
17
14
54
36
1
8
51
2
43
47
5
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