T
GND
GND
GND
GND
GND
T
GND
GND
GND
T
T
GND/ADJ
OUT
VIN
4
GND/ADJ
OUT
VIN
4
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND
GND/ADJ
OUT
VIN
4
T
T
GND/ADJ
OUT
VIN
4
T
T
T
GND
GND
T
AAM
IN
SW
EN/SYNC
BST
FB
GND
VCC
GND
GND
OUT
AGND
FB
EN
PGND
SW
VIN
PG
T
T
T
Min 1.16V/ Max 1.24V
Vref=0.6V
@max3A
For silicon Tuner Supply
FOR DEMOD IC SUPPLY
300mA
LO=>PS POWER OFF
LO=>LVDS POWER OFF
HI=>LVDS POWER ON
HI=>PS POWER ON
BACKLIGHT DIMMING ADJUST
173mA
POWER & BACKLIGHT CONTROL
PANEL POWER SUPPLY
SWITCH POWER
DDR POWER
STANDBY POWER SUPPLY
MS306*PB
12V TO 5VAIN CIRCUIT
SYSTEM POWER(2/8)
VCC=0.8(1+R007/(R008+R009))=5.18V
(Vin=2.5V-5.5V)
Fixed OCP=4.2A
Fixed Fsw=1.2MHZ
For timing sequence
680mA
CORE POWER
If Vout=1V Set R016=150K R017=4.7K R018=220K
If Vout=1.2V Set R016=150K R017=0R R018=150K
VCC=0.6(1+R016/(R018+R017))=1.2V
If Vout=1.26V Set R016=150K R017=36K R018=100K
If Vout=1.8V Set R016=150K R017=6.2K R018=68K
ZP-ON/OFF
ZBL-ON
Z5VSTB
36K
R017
R018
100K
5
6
7
8
4
3
2
1
U002
MP2143
C013
0.1U
C012
10U
C014
0.1U
R015
510K
R016
150K
+1V2_VDDC
C017
10U
C015
22U
L002
1UH
5VSTB
C048
1000P
R027
22R
NC
C049
470P
NC
0.1U
C010
C042
0.1U
R008
6K8
R010
0R
C006
15P
R007
39K
R006
33K
5VSTB
R014
3.3K
0.1U
C011
R013
2K7
R029
3.3K
R011
4.7K
33K
R012
R031
2K7
B
C
E
Q001
BT3904
0.1U
C041
R034
0R
NC
R035
0R
R030
4K7
+3V3STB
R028
10K
NC
R004
10R
1
2
3
6
5
8
4
7
U001
MP1495
100K
R001
R003
82K
C005
0.1U
C001
10U
C043
10U
10U
C008
0.1U
C003
Z12V
5VSTB
12V
5VAIN
C007
220U
10V
R009
330R
L001
6.8UH
C019
0.1U
0.1U
C025
C027
22U
C020
10U
C022
22U
0.1U
C024
C023
10U
C018
10U
C026
10U
Z3V3STB
VCC-PANEL
Z5VAIN
R032
33K
C030
22P
4K7
100R
R022
1K
R021
NC
1K
R023
4
1
2
3
U003
AS1117-3.3
5VAIN
+3V3STB
5VSTB
+3V3STB
5VAIN
12V
5VAIN
R024
1K
AVDD-DDR-1V8
AVDD_DDR_1V8
0.01U
C028
NC
R020
120R
5VAIN
R019
270R
1
2
3
4
U004
AS1117AD
G
D
S
PMV65XP
Q004
VCC-PANEL
B
C
E
BT3904
Q003
0.01U
C029
R025
10K
NC
S
D
G
PMV65XP
Q002
0.1U
C021
C004
0.1U
0.1U
C002
0.1U
C009
R005
10K
82K
R002
C034
10U
C035
22U
C039
10U
C037
10U
C040
22U
C032
10U
5VAIN
5VAIN
TUNER-3V3
VCC3V3
0.1U
C031
1
2
3
4
U005
AS1117-3.3
1
2
3
4
U006
AS1117-3.3
0.1U
C033
ZTUNER-3V3
0.1U
C036
0.1U
C038
ZVCC3V3
5VSTB
+1V2-VDDC
C016
22U
ZDIM-PWM
Summary of Contents for K-LED40FHDXT2
Page 30: ...1 No power No power LED RC or Key can not turn on TV Power LED no light no change...
Page 31: ...2 No Display Black Panel Back light is OK sound is OK but no picture...
Page 32: ...3 No back light Power LED logic OK sound OK but no picture Different from No Display...
Page 33: ...4 No sound One or all signal source without sound...
Page 34: ...5 Signal source no function One or several source no function...
Page 35: ...6 Abnormal Display OSD NG or picture NG...
Page 36: ......
