Read LG 37LT770H (CHASSIS:LA2FF) Service Manual online
THERMAL
T
H
E
R
M
A
L
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.
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.
@partN
@refer
@compC
@suppr
12/06/08
EAX64677901.cir/086.sht
@area
C8607
47uF
10V
47uF
10V
C8603
10uF
25V
10uF
25V
C8600
2.2uF
10V
IC8600
SC632ULTRT
3
C1-
2
C1+
4
IN
1
GND
5
EN
6
OUT
7
C2+
8
C2-
9
[EP]GND
C8601
2.2uF
10V
2.2uF
10V
C8606
47uF
10V
47uF
10V
+3.5V_ST
+5V_ST
R8644
0
PTC_TX_MTK
UART3_RX
C8632
0.1uF
0.1uF
SOC_RX
8:AK23
RS232_RX38:X21
R8622
47K
+3.5V_ST
+3.5V_ST
/UPDATE_BY_CPU
PTC_RX_MTK_3.3V
R8646
47K
C8633
0.1uF
0.1uF
+3.5V_ST
+3.5V_ST
UPDATE_SW
87:L19
R8637
10K
10K
RESET_HIGH
87:M27
PTC_RX_5V
87:X7
IC8604
MC14053BDR2G
3
Z1
2
Y0
4
Z
1
Y1
6
INH
5
Z0
7
VEE
8
VSS
9
C
10
B
11
A
12
X0
13
X1
14
X
15
Y
16
VDD
Q8603
2SC3875S(ALY)
E
B
C
R8641
10K
+3.5V_ST
R8645
0
IC8605
MC14053BDR2G
3
Z1
2
Y0
4
Z
1
Y1
6
INH
5
Z0
7
VEE
8
VSS
9
C
10
B
11
A
12
X0
13
X1
14
X
15
Y
16
VDD
R8621
10K
RS232_TX38:X21
UART_SWA
87:AA21
UART3_TX
S27;87:N15;87:Y26;
87:AA4
87:AA4
R8627
0
PTC_TX
87:X7
UART3_RX
Y25;87:N15;87:Y26;
87:AA4
87:AA4
UART3_TX
S21;87:N15;87:Y26;
87:AA4
87:AA4
UART_SWB
87:AA21
SOC_TX
8:AK24
R8638
10K
10K
Q8602
2SC3875S(ALY)
E
B
C
R8643
10K
R8626
100
R8629
100
R8630
100
R8628
100
R8634
100
R8633
100
R8632
100
R8635
100
R8631
100
R8636
100
R8639
1K
R8640
1K
RESET_BY_CPU
C8639
10uF
25V
10uF
25V
C8602
0.1uF
16V
16V
OPT
R8663
18K
1%
D8600
40V
SMAB34
R8660
0
R8662
56K
1%
R8661
100K
1%
+3.5V_ST
+12V_ST
C8640
1uF
10V
1uF
10V
MPI_PWR_ON/OFF
L8600
3.6uH
C8655
22uF
16V
22uF
16V
C8644
1uF
16V
1uF
16V
OPT
IC8602
TPS61087DRC
3
EN
2
FB
4
AGND
1
COMP
5
PGND
6
SW_1
7
SW_2
8
IN
9
FREQ
10
SS
11
[EP]AGND
C8617
10uF
10V
10V
C8641
0.1uF
16V
16V
R8664
75K
C8643
100pF
50V
100pF
50V
OPT
C8642
1200pF
50V
1200pF
50V
EXT_AMP_L_IN
C8609
0.1uF
0.1uF
C8608
22uF
16V
16V
R8611
1K
1K
+5V_SUB_AMP
Q8601
MMBT3904(NXP)
E
B
C
IC8601
TPA6011A4PWPRG4
3
PVDD_1
2
ROUT-
4
RHPIN
1
PGND_1
6
RIN
5
RLINEIN
7
VDD
8
LIN
9
LLINEIN
10
LHPIN
11
PVDD_2
12
LOUT-
13
PGND_2
14
LOUT+
15
SHUTDOWN
16
FADE
17
BYPASS
18
AGND
19
SEMAX
20
SEDIFF
21
VOLUME
22
HP/LINE
23
SE/BTL
24
ROUT+
+5V_SUB_AMP
C8612
1uF
25V
25V
L8605
BLM18PG121SN1D
EXT_AMP_R_IN
+5V_SUB_AMP
R8609
100
100
OPT
EXT_SPK_R-
R8608
4.7K
4.7K
R8601
1K
1K
R8603
1K
1K
R8602
100
+5V_NORMAL
R8605
3.3K
3.3K
R8610
100
EXT_SPK_L-
EXT_SPK_R+
C8611
1uF
10V
C8610
1uF
10V
EXT_SPK_L+
R8606
10K
R8604
0
0
EXT_SPK_MUTE
R8607
100
100
R8615
1K
1K
+3.5V_ST
EXT_SPK_L+
EXT_SPK_L-
EXT_SPK_R-
C8614
39pF
OPT
L8602
C8613
39pF
OPT
R8617
470K
OPT
JK8600
PEJ029-02
3
E_SPRING
6
T_TERMINAL
7
B_TERMINAL
5
T_SPRING
4
R_SPRING
8
G_SPRING
EXT_SPK_R+
TP8604
C8615
39pF
OPT
L8604
R8618
470K
OPT
R8619
470K
OPT
TP8603
R8620
470K
OPT
TP8602
TP8601
L8603
C8616
39pF
OPT
L8601
R8665
0
R8667
470K
OPT
C8660
6800pF
OPT
OPT
R8671
470K
OPT
OPT
C8661
33pF
+12V
IC8606
AZ4580MTR-E1
3
IN1+
2
IN1-
4
VEE
1
OUT1
5
IN2+
6
IN2-
7
OUT2
8
VCC
C8662
0.1uF
50V
R8670
2.2K
EXT_SPK_ROUT_MAIN
C8657
6800pF
OPT
OPT
EXT_AMP_R_IN
R8666
2.2K
R8673
10K
L8606
120-ohm
C8658
33pF
R8668
33K
EXT_SPK_LOUT_MAIN
R8672
33K
EXT_AMP_L_IN
R8669
10K
+3.3V_NORMAL
EXT_SPK_DET
4.7uF
C8664
10V
C8665
0.47uF
OPT
OPT
R8613
1K
R8612
15K
IC8607
74LVC1G126
OPT
3
GND
2
A
4
Y
1
OE
5
VCC
+3.3V_NORMAL
R8675
10K
10K
OPT
R8676
100
R8674
10K
R8677
0
* 3.5V_ST -> 5V_ST Step-up Power
Serial for Commercial
SELECT PTC OAD OR NOT
SELECT PTC OR BCM DEBUG
1
COM/MON
1
BCM DEBUG
PTC DEBUG
SIMULATION
SW_B
Objective
X
1
0
SW_A
PTC USB
0
X
X
1
X
2011.02.09
xxLT760H-UA
86
Commercial Power
R2
R1
* 3.5V_ST -> 12V_ST Step-up Power
EXT_SPK AMP
400mA
EXT_SPK OUT
EXT_SPK OP AMP
EXT_SPK_DET
Connected
Disconnected
Low
High
Y
QE
A
Input
H
L
Output
H
L
H
X
L
H
Z
X = don’t care
Z = high-impedance OFF-state
74LVC1G126
Click on the first or last page to see other 37LT770H (CHASSIS:LA2FF) service manuals if exist.