Sharp LL-171A Service Manual ▷ View online
LL-171A-W/B/LL-171G-W/B
DISASSEMBLY AND ASSEMBLY
3 – 2
6.
REMOVING LCD PWB
Remove the LCD unit
1
from rear-cover.
7.
REMOVING SPEAKER AND BUTTON PWB
Remove the eight screws
1
, and remove the speaker
2
.
Remove the three screws
3
, and remove the speaker bracket
4
.
Remove the button PWB
5
.
Caution: Although form is well alike, since the stand of LL-191A series
differs in hinge torque, spring pressure, etc. from the stand of
LL-171A series, it is incompatible.
It warns against being intermingled.
LL-191
LL-171
The front side of stand
Two places in the machine
screw fixing part.
The front side of stand
No machine screw fixing part.
1
1
1
1
2
3
3
4
4
5
2
1
Machine screw
Machine screw
stop part
stop part
stop part
Machine screw
fixing part
fixing part
LL-171A-W/B/LL-171G-W/B
BLOCK DIAGRAM
4 – 1
CHAPTER 4. BLOCK DIAGRAM
Input R,G,B
connector
(DUB connector)
DDC EEPROM
24C02
MST9111B/MST9151B
PANEL
PA[0..9],PB[0..9]
INVETER
O203
AO3401
VLCD
RIN.GIN.BIN HSYNC.VSYNC
MCU W78E65P
DDC_CLK
DDC_SDA
CSZ
SDA
SCL
HWRESET
INT
onBACKLITE
onPANEL_5V
AdjBACKLITE
DATA EEPROM
24C16
I2C
AUDIO
TDA7496
Volume
Standby
Mute
L/R Speaker
Audio Input
Keypad
DVI-I Connector
Digital singal
R,G,B singal
DVI-D
DDC EEPROM
24C02
DDC Switch
74VHC4053
DVI-A
DDC EEPROM
24C02
L/R Earphone
I2C
DVI DDC_SCL
DVI DDC_SDA
DVI DDC_SET
LL-171A-W/B/LL-171G-W/B
BLOCK DIAGRAM
4 – 2
■
CONNECTOR SIGNAL TABLE
[MAIN PWB]
CONNECTOR CN201
CONNECTOR CN301
CONNECTOR CN302 (LL171G)
CONNECTOR CN503
CONNECTOR CN601
CONNECTOR CN602
1
GND
2
ON_OFF
3
GND
4
DIM
5
VCC12V
6
VCC12V
7
GND
8
GND
9
VCC5V
10
VCC5V
11
GND
12
GND
1
RED
2
GREEN
3
BLUE
4
TXD
5
GND
6
RGND
7
GGND
8
BGND
9
DDC5V
10
SGND
11
RXD
12
SDA
13
HSYNC
14
VSYNC
15
SCL
1
DAT2-
2
DAT2+
3
2/4shield
4
DAT4-
5
DAT4+
6
DDC_SCL
7
DDC_SDA
8
VSYNC
9
DAT1-
10
DAT1+
11
1/3shield
12
DAT3-
13
DAT3+
14
+5V
15
SYNC GND
16
HPD
17
DAT0-
18
DAT0+
19
0/5shield
20
DAT5-
21
DAT5+
22
clk shield
23
clk+
24
clk-
25
R
26
G
27
B
28
HSYNC
29
RGB_GND
1
RXO0-
2
RXO0+
3
RXO1-
4
RXO1+
5
RXO2-
6
RXO2+
7
RXOC-
8
RXOC+
9
RXO3-
10
RXO3+
11
RXE0-
12
EXE0+
13
RXE1-
14
EXE1+
15
RXE2-
16
EXE2+
17
RXEC-
18
EXEC+
19
RXE3-
20
EXE3+
21
GND
22
GND
23
VLCD
24
VLCD
1
VCC5V
2
VCC5V
3
VCC12V
4
VCC12V
5
GND
6
Standby
7
Volume
8
Mute
9
GND
10
GND
11
OUT-L+
12
OUT-R+
13
OUT-L-
14
OUT-R-
1
DVI_DSUB_SELECT
2
N.C
3
LED_GREEN
4
LED_ORANGE
5
MODE/SEL
6
MENU
7
RIGHT
8
LEFT
9
POWER
10
GND
11
GND
12
Mute key
13
OUT-L+
14
OUT-R+
15
OUT-L-
16
OUT-R-
LL-171A-W/B/LL-171G-W/B
BLOCK DIAGRAM
4 – 3
[POWER • INVERTER PWB]
INLET CN901
CONNECTOR
CONNECTOR CN201
CONNECTOR CN202
CONNECTOR CN203
CONNECTOR CN204
[AUDIO PWB]
JACK CN201
CONNECTOR CN202
[KEY SPEAKER PWB]
CONNECTOR CN102
CONNECTOR CN103
CONNECTOR CN104
JACK CN105
CONNECTOR CN206
[LED PWB]
CONNECTOR CN101
1
L1
2
L2
3
PE
1
GND
2
ON/OFF
3
GND
4
DIM
5
12V
6
12V
7
GND
8
GND
9
5V
10
5V
11
GND
12
N.C
1
HV
2
LV
1
HV
2
LV
1
HV
2
LV
1
HV
2
LV
1
GND
2
R-IN
3
R-COM
4
L-COM
5
L-IN
1
GND
2
GND
3
OUT_L
4
OUT_R
5
GND
6
GND
7
VOLUME
8
MUTE
9
GND
10
STBY
11
+12V
12
+12V
13
N.C
14
N.C
1
Audio-L+E
2
Audio-L-
1
Audio-R+E
2
Audio-R-
1
GND
2
POWER
3
RIGHT
4
LEFT
5
MENU
6
MODE
7
YELLOW
8
GND
9
GREEN
10
INPUT
11
Audio-R-
12
Audio-R+
13
Audio-L-
14
Audio-L+
1
GND
2
L-OUT
3
R-OUT
4
SW-OFF1
5
SW-COM1
6
SW-ON1
7
SW-OFF2
8
SW-COM2
9
SW-ON2
10
L-COM
11
R-COM
1
GND
2
GREEN
3
YELLOW
4
POWER
1
POWER
2
YELLOW
3
GREEN
4
GND
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