TCL L40B2800 Service Manual page 31

ZL
T
!
!
F81
NTC82
!
T 1R5
3.15A !
250VAC
VR81
!
!
680V
!
L81
!
!
NTC81 !
!
T
1R5
BR
R801 R802
R803
VCC1
300K 300K 300K
R804
510K
FB
PGND
PGND
LED Driver
+50VLED
R770 100R
12V
U770
C770 1U
13
VDD
BL_ON R771
R775 470K
FSW
8
FSW
10K
R776
1K
15
COMP
C773 1U
3
GND1
ISET 6
GND ISET
PWMI 16
PWMI
EN 9
EN
GND LED4 5
FB4
GB98A
DIM_PWM R773
PWMI
R779B
FSW
10K
NC
R777
200R
GND
GND
HV
BR
ZHV
!
D81 T
D82
RL255
RL255
D83 D84
RL255 RL255
!
GND
L82
!
!
T
ZPGND
PGND
R818
10R R817 22R
U801
1 6
Q802
GND GATE
BT3906 B
VCC1
2 5
FB VDD
PGND
R815 22R
3 4
RT CS
R814
RT7736
470R
ZVCC1
T
D802
FR104 R812 10R
VCC1
C805
C805A
10U
R813
10U
50V
50V
PGND PGND
L770
120UH
B770
VAL?
ZD770 10V
A0D256
1U
C775
VCC
12
VCC
R780 22R
11
GATE
1K
10
CS
14 R781
GND2
7 OVP
OVP
1 LED1
FB1
LED2
2
FB2
4 LED3
FB3
GND
GND
R779A
VCC
100K
R778
ISET
6K8
!
VS
1
N1
2
N4
VAL? 3
B801
FR207
D801
AOTF11C60
Q801
4
E
HV
5
C
N2
12VOUT
6
E1,E2
T801
VS
PGND
HS1
1
2
3
10R
4
CY83
!
PGND
D770
VLED+
SB5200
OVP
LED1
GND
GND
GND
GND
SCH
SCH
2
MBR10150
1 3
D850
D850A
12 MUR460
R850
33R
R851
33R
11 C850
33R R852
220P
N3
2
12VOUT
1 3
10
MBR10150
D830
C830
33R R830
1000P
9
R831
33R
8
GND
ZPC1
R838
7
T
+50VLED 1K
R833
ZFB 1K
T
PC820
!
1
4
3 2
0R R824
FB
TLP781
T
ZPC2
T
GND
ZPCGND
PGND
NC
GND
12V-1
CN802
T
4 12V
3
2
1
GND
T
GND-1
LED2 LED3
LED4
1
1
+50VLED
33V
R853A
4.7K
0.1U C853A
T
Z50V
ZD850
33V
0.1U C853B
4.7K R853B
ZD851
Z12V
T
12V
NC
ZGND
T
12V
12V
R834 R835
C835
0.1U
2K 10K
0.1U
C836
ZLED+
T
VLED+
12V
1
ZLED4
T
2
ZLED3
R798 0R
T
3
LED1
4
R795 0R
LED2
5
R796 0R
LED3
6
R797
0R
LED4
7
T
8
VLED+
T
ZLED2
ZLED1
9
10
CN701
V 1.0
MS08FP.SCH
MS08FP