Sharp LL-193 (serv.man2) Service Manual ▷ View online
LL-193A/LL-193G
DISASSEMBLY AND ASSEMBLY
3 – 2
■ POWER PWB, AUDIO PWB, AND CON-
VERSION PWB DISASSEMBLY
1) Remove the stand unit and the rear cover.
2) Remove two screws 1, two hex screws 2 (four screws for the 193G),
and one aluminum tape 3. Remove two screws 4 and the earth termi-
nal 5. Slide the main shield 6 downward and remove it.
3) Remove two yellow tapes 7, and two connector-disconnection-prevent-
ing plates 8. Disconnect five connectors 9 at five positions. Remove
one screw F and the earth terminal G. Remove five screws H and
slide the power PWB I upward and remove it.
4) Remove two screws J. Disconnect the connector and remove the
audio PWB K.
5) Disconnect the connector L at three positions. Remove four screws M,
and remove the conversion PWB N.
■ LCD MODULE DISASSEMBLY
1) Remove the stand unit and the rear cover.
2) Remove the main shield.
3) Remove two yellow tapes 1 and two aluminum tapes 2. Disconnect
the connector 3 at one position.
4) Remove the pawl, and remove the front cover 4.
5) Remove three yellow tapes 5 and two connector-disconnection-pre-
venting plate 6. Disconnect the connector 7 at five positions.
6) Remove four screws 8 and remove the LCD module 9. Remove the
black tape F and disconnect the connector G at one position.
3
6
5
4
4
2
2
1
193G only
10
11
13
12
12
8
8
7
7
9
12
9
9
15
14
18
17
17
16
16
1
2
3
4
6
5
7
6
5
7
5
7
10
11
9
8
8
LL-193A/LL-193G
BLOCK DIAGRAM
4 – 1
CHAPTER 4. BLOCK DIAGRAM
Input R,G,B
connector
(DUB connector)
DDC EEPROM
24C02
GM2321/5321 with
In
te
rn
al
M
C
U
P
A
NEL
L
V
_E[
0..9]
,L
V_O[0..9]
INVETER
O203
AO3401
VL
CD
DDC_
SCL
_
A
DDC_
SDA_
A
SDA
SCL
PBIS for backlight on
PPWR for panel on
PWM0/PWM1 for backlight
DA
T
A
EEPROM
24C16
I2C
AUDI
O
TDA7496
VOLUME
Standby
Mute
L/R Speaker
Audio Input
DVI-D Connector
For GM5321
Digital singal
DVI
-D for
GM5321
DDC EEPROM
24C02
L/R Earphone
DDC_SCL_DVI
DDC_SDA_DVI
Flash
ROM
SST&PMC
Key board
External IC
RESETn
5V for L
G
EO4
12V for L
G
E05
RIN.GIN.BIN HSYNC.
VSYNC
LL-193A/LL-193G
BLOCK DIAGRAM
4 – 2
■ CONNECTOR SIGNAL TABLE
[MAIN PWB]
CONNECTOR CN101 (LL-193G only)
CONNECTOR CN102
CONNECTOR CN301 (LL-193A, LL-193G)
CONNECTOR CN302
CONNECTOR CN303
CONNECTOR CN401
[AUDIO PWB]
JACK CN201
CONNECTOR CN202
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
RED
2
GREEN
3
BLUE
4
N.C.
5
GND
6
RGND
7
GGND
8
BGND
9
DDC5V
10
SGND
11
N.C.
12
SDA
13
HSYNC
14
VSYNC
15
SCL
1
GND
2
ON_OFF
3
DIM1
4
DIM
5
VCC12V
6
VCC12V
7
GND
8
GND
9
VCC5V
10
VCC5V
11
GND
12
GND
1
AUTO/INPUT
2
N.C.
3
LED_GREEN
4
LED_RED
5
MODE/SEL
6
MENU
7
RIGHT
8
LEFT
9
POWER
10
GND
11
GND
12
N.C.
13
OUT-L+
14
OUT-R+
15
OUT-L-
16
OUT-R-
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
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
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
LL-193A/LL-193G
TROUBLESHOOTING
5 – 1
CHAPTER 5. TROUBLESHOOTING
■ NO POWER SUPPLY
* Inverter cable is separated?
* Inverter cable is disconnection?
* Check the output of each pin
2 pin (ON/OFF) 3pin (DIM-)
4pin (DIM+)
* Inverter cable is disconnection?
* Check the output of each pin
2 pin (ON/OFF) 3pin (DIM-)
4pin (DIM+)
No power supply
Does LED turns on in green
when power switch is turned
on?
when power switch is turned
on?
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No output +5V, 12V from
power supply unit.
Yes
Replace power supply unit.
1) PC is turned off?
2) RGB cable is disconnected?
3) Synchronizing signal is output from RGB
2) RGB cable is disconnected?
3) Synchronizing signal is output from RGB
cable?
Check whether the unit is in power save
mode (synchronizing signal is not input.).
mode (synchronizing signal is not input.).
Synchronizing signal is input to main PWB?
Replace RGB cable
with a new one.
with a new one.
LED turns on in orange?
Check power input system.
Replace any defective unit.
[ 1) Power supply PWB, 2) Main PWB,
3) Switch PWB, 4) Audio PWB] with a new one.
[ 1) Power supply PWB, 2) Main PWB,
3) Switch PWB, 4) Audio PWB] with a new one.
Backlight turns ON?
Check for RGB cable input
signal.
signal.
Replace RGB cable.
Normal
Normal
Normal
Defective
Defective
* Check inverter PWB unit.
Note: Use caution when checking output
Note: Use caution when checking output
side because it has a high voltage.
Replace LCD module lamp with
a new one.
a new one.
Replace inverter PWB
unit with a new one.
unit with a new one.
A
1) Power Inverter supply PWB Normal?
Connected with the MAIN PWB properly?
2) Blown out fuse (D327)?
Check VCC5V+, +5V, +3.3V and +1.8V
are output?
3) Check POWER switch and LED for
breakage.
4) Check the Audio PWB of 12V connected
too hastily.
Connected with the MAIN PWB properly?
2) Blown out fuse (D327)?
Check VCC5V+, +5V, +3.3V and +1.8V
are output?
3) Check POWER switch and LED for
breakage.
4) Check the Audio PWB of 12V connected
too hastily.
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