Sharp LL-171ME (serv.man3) Service Manual ▷ View online
LL-171ME
HARDWARE DESCRIPTION
6 – 2
1-4. INVERTER UNIT (TBD024L REV. C)
The 4-bulb backlight (fluorescent lamp) lighting unit which controls the
brightness of the LCD panel. The J1 connector Pins 1, 2, and 3 on the
main PWB are used for power supply (12V), Pin 8 for backlight On/Off
main PWB are used for power supply (12V), Pin 8 for backlight On/Off
control (On when the voltage is 2V or higher), and Pin 7 for control volt-
age which adjust brightness. The backlight is at the brightest when the
voltage is 0 V and it darkens as the voltage drops (3.3V max.)
voltage is 0 V and it darkens as the voltage drops (3.3V max.)
When the lamp fails to operate normally, the inverter unit may be shut
off due to operation of the protective circuit.
Caution: The inverter unit supplies a high voltage of approx. 1000 volts
Caution: The inverter unit supplies a high voltage of approx. 1000 volts
to the lamps using the step-up transformer. It is dangerous to
touch the output connector or other parts around it with hand
when the system is in conduction. Use caution not to get an
when the system is in conduction. Use caution not to get an
electric shock accident when servicing.
1-5. AC ADAPTER (0219B1270)
The AC adapter is an auto power supply of 12-V output, 5.83A (MAX). It
can be used at a voltage of 90 -264 V AC (50/60 Hz).
The output plug has a grounding section at its exterior and an output
section at its interior.
section at its interior.
It is provided with protective circuits (overvoltage, overcurrent, humidity)
and can be restored by unplugging and then plugging again the AC
cable after shut-down.
cable after shut-down.
In addition, two fuses are provided at the primary side.
1-6. REMOTE CONTROL
Infrared rays are emitted in pulses by the remote control key (remote
control code).
The remote control light receiving section Ul1 installed on the front area of
The remote control light receiving section Ul1 installed on the front area of
the main set, converts infrared rays (light) it receives, into voltages and
transmits the information to the microprocessor for proper processing.
*
The remote control code is the same as that for Sharp LCD TV AQUOS.
LL-171ME
CIRCUIT DIAGRAM & PWB LAYOUT
7 – 1
VCON
VDD
VEE
VDD
VDD
BRI-CON
+12V
V3P
V33
V25
V33
V25
+12V
V33
+12V
V33
+12V
V50
V12
SW-V50
+50V
+12V
V50
SW-V90
SW-LCD
SW-V33
V25
V50
V33
SW-V120
HW-PW
(7)
TXD
(2,4)
RXD
(2,4)
SCL
(3,4,5)
SDA
(3,4,5)
VOL-CON
(8)
BLEN
(4,8)
RESET
(4)
LED2
(7)
LED1
(7)
PSEN
(4)
LCDPWON
(4)
VDD
VDD
VDD
GND
GND
GND
VCON
VEE
M= METAL 1%
ALL RESISTORS 1/10 WATT,5% UNLESS NOTED.
ALL CAPACITOR VALUES IN uF UNLESS NOTED.
ALL RESISTORS VALUES IN OHMS UNLESS NOTED.
ALL RESISTORS 25 VOLT IN .1uF UNLESS NOTED.
NOTE : NC MEANS "NOT CONNECTED ON PCB BOARD"
ALL CAPACITORS 50 VOLT & 105"C UNLESS NOTED.
R30
22K
U5
62334
AO2
2
AO1
1
AO3
3
GND
5
SDA
6
SCL
7
VCC
8
AO4
4
L5
70uH
R13
30K
R21
1.2K
C8
470u/16V
R205
4.7 ohm
R33
22K
R5
2.2K
R34
4.7K
R18
10K
D1
SB340
R35
4.7K
R204
4.7ohm/1206
C9
470u/16V
ZD4
5C1/SMD
1
2
U12
IRF7316
S1
1
G1
2
S2
3
G2
4
D2
5
D2
6
D1
7
D1
8
R2
10
D2
SB340
R32
47
R29
22K
JP2
2.54mm
1
2
D18
1N4148
1
2
C22
N.C
C11
.1u
Q4
2N3904
R1
4.7K
R20
3.9K
R39
22K
R10
2.2K
L3
3.5x6x1x2
C25
0.1uF
D3
BAV70/SOT
C7
0.1uF
R17
10K
R7
NC
R11
10K
ZD1
1N4735/DIP(1W)
1
2
R3
10
J2
W200-4
1
2
3
4
R12
10K
D4
1N4148
1
2
R16
150
C26
NC
U7
LM2576
Vin
1
SW
2
GND
3
FB
4
SHDN
5
Q5
2N3904
R8
1.3K
R4
4.7K/1206
C21
0.1uF
+
C5
1000u/16V
R38
3.3K
F3
2A
U9
KIA7021AP
OUT
3
GND
2
IN
1
C18
470u/16V
R25
22K
L1
3.5x6x1x2
R9
2.2K
R22
3.3K
R36
330/1206
C134
0.1uF
C4
470u/16V
Q8
2N3904
+C
1
1000u/16V
U2
IRF7316
S1
1
G1
2
S2
3
G2
4
D2
5
D2
6
D1
7
D1
8
C2
0.1uF
Q9
2N3904
R31
4.7K
F2
3A
U10
IRF7316
S1
1
G1
2
S2
3
G2
4
D2
5
D2
6
D1
7
D1
8
C27
330u/16V
C15
.1u
C17
470u/16V
C28
0.1uF
R15
150
R37
4.7K
R23
2.2K
ZD3
1N4732/DIP(1W)
1
2
C23
100u/16V
JP1
N.C
1
2
R57
100
W1
DC JACK
1
2
3
3
R19
10K
L7
70uH
0.1uF
CP1
C20
0.1uF
U8A
74LCX14
1
2
C3
470u/16V
U1
LM1117/SOT23
VIN
3
GND
1
VOUT
2
C24
10u/50V
C16
.1u
R24
22K
Q2
2N3904
F1
7A
U3
LM2576
Vin
1
SW
2
GND
3
FB
4
SHDN
5
C6
0.1uF
R26
22
R206
100
R28
4.7K
L2
3.5x6x1x2
J1
W200-8A
1
2
3
4
5
6
7
8
R27
22
U8B
74LCX14
3
4
R14
10
R40
470
C13
0.1uF
Q1
2N3904
C12
470u/16V
C10
470u/16V
U11
7809
GND
1
IN
3
VO
2
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
1/15
PO
WER
CH
APTER 7.
CIR
CUIT
DIAGRAM
& PWB
LAYOUT
■
CIRCUIT
LL-171ME
CIRCUIT DIAGRAM & PWB LAYOUT
7 – 2
GI
ESCL
ESDA
RI
BI
MV33
VCCX
V50
MV33
V50
V50
V50
VCCX
VCCX
VCCX
VCCX
MV33
V50
V50
V50
Y
(13,15)
CR
(15)
CB
(15)
GO
(3)
G-BUF
(3)
HSYNC-SW
(3)
SYNC-SPD
(7)
VSYNC-SW
(3)
ADC-SEL
(4,9)
BO
(3)
EDID-SEL
(4)
TXD
(1,4)
RXD
(1,4)
RO
(3)
GND
GHSI
GBAI
GGAI
GND
RGSA
RVSI
GND
GND
GND
GND
RGSL
GRAI
M= METAL 1%
ALL RESISTORS 1/10 WATT,5% UNLESS NOTED.
ALL CAPACITOR VALUES IN uF UNLESS NOTED.
ALL RESISTORS VALUES IN OHMS UNLESS NOTED.
ALL RESISTORS 25 VOLT IN .1uF UNLESS NOTED.
NOTE : NC MEANS "NOT CONNECTED ON PCB BOARD"
ALL CAPACITORS 50 VOLT & 105"C UNLESS NOTED.
R72
M600
R68
47
C40
NC/0.1uF
C38
NC/22P
R84
4.7K
C55
0.1uF
R70
NC/47K
R63
NC/10
C42
330uF/16V
C48
NC/0.1uF
1
2
U13
NC/7657
RIN1
1
HSYNC
2
GIN1
3
GND
4
BIN1
5
GND
6
RIN2
7
GND
8
GIN2
9
GND
10
BIN2
11
VD1(IN)
12
VD2(IN)
13
VD(OUT)
14
BOUT
15
CTL
16
CSYNC
17
CSOGIN
18
GOUT
19
VCC
20
ROUT
21
HD(OUT)
22
HD2(IN)
23
HD1(IN)
24
D5
BAV99
1
3
2
C45
NC/22uF/16V
U17
74HC4053
S1
11
S2
10
S3
9
1Y0
12
1Y1
13
2Y0
2
2Y1
1
3Y0
5
3Y1
3
1Z
14
2Z
15
3Z
4
E_
6
VEE
7
VCC
16
GND
8
L11
30BN3
R49
NC
R79
10K
R83
2.2K
D8
1N4148
R46
NC/10
R45
NC/10
C19
NC/22uF/16V
C32
NC/0.1uF
C53
NC/22uF/16V
R75
2.2K
U16
24LC21/SMD
NC1
1
NC2
2
NC3
3
GND
4
SDA
5
SCL
6
VCLK
7
VCC
8
R80
470
C30
NC/0.1uF
C58
18PF
R52
NC/10
R60
75
R67
22
R77
22
C57
18PF
D9
1N4148
R48
NC
C56
22PF
D12
BAV99
1
3
2
R71
NC/100K
L14
NC/0805
C39
NC/5pF
R50
NC
R61
75
C33
NC/22uF/16V
6C3
ZD2
C36
NC/0.1uF
R59
NC/10
L10
30BN3
R43
80AN2
D7
BAV99
1
3
2
U15D
74LCX125
12
11
13
C59
18PF
L12
NC/0805
R66
NC
C37
NC/22uF/16V
R82
22
D10
BAV99
1
3
2
R81
M600
L8
NC/0805
U15A
74LCX125
2
3
14
1
7
C31
NC/100uF/16V
L9
30BN3
U14A
NC/74HC123
CEXT
14
REXT/CEXT
15
A
1
B
2
CLR
3
Q
13
Q
4
C54
0.1uF
L13
100/0805
D13
BAV99
1
3
2
C35
NC/22uF/16V
R64
NC
R62
75
U15B
74LCX125
5
6
14
4
7
R56
NC/2.2k
C49
NC/2.2nF
R55
NC/10
U14B
NC/74HC123
CEXT
6
REXT/CEXT
7
A
9
B
10
CLR
11
Q
5
Q
12
R47
NC/10
R44
80AN2
W2
DSUB15HD
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
R78
10K
R42
80AN2
C34
NC/0.1uF
C51
18PF
C43
NC/0.1uF
D6
BAV99
1
3
2
R69
47
C52
18PF
R53
NC/10
R76
NC/10K
R74
22
D11
BAV99
1
3
2
R65
NC
LT5
0
C50
NC/2.2nF
R58
NC/10
R51
NC/22
C47
NC/22uF/16V
C41
NC/22uF/16V
C46
NC/0.1uF
R73
22
R54
NC/10
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
2/15
GRAPHIC-IN
LL-171ME
CIRCUIT DIAGRAM & PWB LAYOUT
7 – 3
GGE1
GGE6
GGE2
GBE6
GGE3
GGE4
GGE5
GGE7
GBE4
GGE0
GBE5
GBE2
GBE7
GBE3
SOGOUT
GRE4
GRE1
GRE5
GRE0
GRE6
GRE3
GRE2
GRE7
SOGOUT
GBE0
GBE1
GBE5
GBE6
GBE7
GBE2
GBE3
GBE1
GBE0
GBE4
GGE0
GGE1
GGE2
GGE3
GGE4
GGE5
GGE6
GGE7
GRE0
GRE1
GRE2
GRE3
GRE4
GRE5
GRE6
GRE7
SOGOUT
PVDD
PVDD
AVDD
DV33
DV33
AVDD
AVDD
AVDD
DV33
DV33
AVDD
AVDD
AVDD
AVDD
AVDD
AVDD
AVDD
AVDD
PVDD
AVDD
MV33
DV33
DV33
DV33
DV33
V50
PVDD
V33
V33
V33
V33
V33
V33
V33
DV33
AVDD
AVDD
AVDD
GGE[7:0]
(4)
GFBK
(4)
GCLK
(4)
GVS
(4)
GHS
(4)
RO
(2)
GO
(2)
BO
(2)
SDA
(1,4,5)
SCL
(1,4,5)
G-BUF
(2)
GCOAST
(4)
HSYNC-SW
(2)
GBLKSPL
(4)
VSYNC-SW
(2)
GRE[7:0]
(4)
MARVSEN
(4)
GBE[7:0]
(4)
For Marcovision
M= METAL 1%
ALL RESISTORS 1/10 WATT,5% UNLESS NOTED.
ALL CAPACITOR VALUES IN uF UNLESS NOTED.
ALL RESISTORS VALUES IN OHMS UNLESS NOTED.
ALL RESISTORS 25 VOLT IN .1uF UNLESS NOTED.
NOTE : NC MEANS "NOT CONNECTED ON PCB BOARD"
ALL CAPACITORS 50 VOLT & 105"C UNLESS NOTED.
10pF
CP4
C87
NC/220pF
C85
22P
C62
470uF/16V
R93
22
RP4
22R
C83
NC/0.1uF
1
2
RP5
22R
C60
82nF
R91
NC/220
C84
22P
C82
47nF
C76
0.1uF
R88
22
C77
220uF/25V
R85
2.7K
R94
22
10pF
CP5
D14
NC/1N4148
C61
0.1uF
R95
NC/100K
D15
NC/1N4148
R87
22
C75
0.1uF
L19
0.5/1206
RP3
22R
C88
NC
R89
NC/47K
R98
NC/390K
C90
NC
R90
NC/22
U19
MST9883
GND
1
G7
2
G6
3
G5
4
G4
5
G3
6
G2
7
G1
8
G0
9
GND
10
VDD
11
B7
12
B6
13
B5
14
B4
15
B3
16
B2
17
B1
18
B0
19
GND
20
GND
21
VDD
22
VDD
23
GND
24
GND
25
VD
26
VD
27
GND
28
COAST
29
HSYNC
30
VSYNC
31
GND
32
FILT
33
PVD
34
PVD
35
GND
36
MIDSCV
37
CLAMP
38
VD
39
GND
40
GND
41
VD
42
BAIN
43
GND
44
VD
45
VD
46
GND
47
GAIN
48
SOGIN
49
GND
50
VD
51
VD
52
GND
53
RAIN
54
A0
55
SCL
56
SDA
57
REF_BYP
58
VD
59
GND
60
GND
61
VD
62
GND
63
VSOUT
64
SOGOUT
65
HSOUT
66
DATACK
67
GND
68
VDD
69
R7
70
R6
71
R5
72
R4
73
R3
74
R2
75
R1
76
R0
77
VDD
78
VDD
79
GND
80
C74
0.1uF
R92
NC
C89
NC/220pF
L18
0.5/1206
C86
0.1uF
C81
1000pF
C73
0.1uF
C66
0.1uF
U18
NC/LM1117/SOT23
VIN
3
GND
1
VOUT
2
10pF
CP6
L17
NC/1206
C65
0.1uF
C63
8.2nF
C72
0.1uF
C70
0.1uF
C92
NC/0.1uF
L15
NC/1206
RP2
22R
U20B
NC/74LCX123
CEXT
6
REXT/CEXT
7
A
9
B
10
CLR
11
Q
5
Q
12
10pF
CP2
D16
NC/1N4148
C67
0.1uF
C79
47nF
C71
0.1uF
C68
0.1uF
10pF
CP7
U20A
NC/74LCX123
CEXT
14
REXT/CEXT
15
A
1
B
2
CLR
3
Q
13
Q
4
VCC
16
GND
8
L16
4.7/1206
U15C
74LCX125
9
8
14
10
7
R86
220/1206
C69
0.1uF
R97
NC
RP1
22R
C78
220uF/25V
10pF
CP3
C64
0.1uF
RP6
22R
R96
NC/1K
C80
47nF
C91
0.1uF
RP7
22R
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
A
B
C
D
876
5
4
3
21
1
2
3
4
5
6
7
8
D
C
B
A
3/15
MST9883
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