LG 42LH90QD (CHASSIS:LT91C) Service Manual ▷ View online
4.5 Checking the function of Bluetooth
using adjusts Remote control
1) Auto checking
• Auto checking is doing in “Power Only”
• Checking the result of searched (check that is in list or not)
• Go out of checking mode pushing button “Exit”
• Auto checking is doing in “Power Only”
• Checking the result of searched (check that is in list or not)
• Go out of checking mode pushing button “Exit”
2) Manual checking
• Push the button “Power Only”and “Exit”
• Push the button hot key “Bluetooth “
• Checking the result of searched (check that is in list or not)
• Go out of checking mode pushing button “Exit
• Push the button “Power Only”and “Exit”
• Push the button hot key “Bluetooth “
• Checking the result of searched (check that is in list or not)
• Go out of checking mode pushing button “Exit
4.6 Checking the function of Local
Dimming using adjusts Remote control
• Dimming checking is doing in “Power Only”
• Enter the signal of component (Pattern: 7 (combination) , Time :
• Enter the signal of component (Pattern: 7 (combination) , Time :
225 (1920 *1080))
• Push the button “Tilt”
• checking the function of Dimming refer to the Picture at below
• Push the button “Exit”
• checking the function of Dimming refer to the Picture at below
• Push the button “Exit”
Patter 7 (combination)
Local Dimming Demo screen
4.7 Outgoing condition Configuration
· When pressing IN-STOP key by SVC remocon, Red LED are
blinked alternatively. And then Automatically turn off.
(Must not AC power OFF during blinking)
Confirm whether is normal or not when between power board's
ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for
one second
ac block and GND is impacked on 1.5kV(dc) or 2.2kV(dc) for
one second
- 17 -
- 18 -
BLOCK DIAGRAM
Digita
l
A
udio (Optic
)
RS-232C (Ctrl./SVC)
MAX3
232
RS232 IC
+
/-
Component 1
Y
P
b
P
r
Au
d
io
L/R
Phone (for RGB)
SP
DI
F
RX
/T
X
R
X
/TX
Serial
In
c
lk, Sy
nc, Va
CV
BS
CV
BS
RGB/
H
/V
EEPR
OM
AV
1
AV
2
RGB
Au
d
io
L/R
USB2.0
US
B
DP
/D
M
MIC2019
O.C. Protector
+5V
+5V
Side
Rear
DDR2 (1Gbit)
Qi
monda
/
H
y
ni
x
N
A
N
D
F
lash
(512Mbit)
Digital
A
M
P
NTP3100L
I2S
DD
R_Data[0:15],
DQS,
D
M
…
A
ddr
.[
]
,
c
tr
l.
data
Saturn6
LGE3369
A
Data [0 …
7
]
A
ddr[0…1],
C
S
…
S
C
L, S
D
A
_3.3V
LCD Module
(HD/FHD)
Serial Flash
(32Mbit)
SP
I
EEPROM
(512K)
CM3212
Se
ns
or
S
C
L, S
D
A
_3.3V
DDR2 (2
56Mbit)
Qi
monda
/
H
y
ni
x
DD
R_Data[0:15],
DQS,
D
M
…
A
ddr
.[
]
,
c
tr
l.
data
Au
d
io
L/R
Au
d
io
L/R
Au
d
io
L/R
Di
v
X
HDMI 1
HDMI 2
HDMI 3
5V_H
DMI
1,
HPD1,
DD
C SC
L/
SD
A,
C
LK,
DA
TA
LN
A
RF Jack (
D
igit
a
l)
RF Jack (
A
nalog)
X
C
5000
Tun
er
Buffer
C
E
6355
De
mod
LGE7329
A
FRC
Component 2
Y
P
b
P
r
Au
d
io
L/R
TX,
Cl
oc
k
Data [0 …
15]
DD
[0…15]
HDMI 4
5V_H
DMI
3,
HPD3,
DD
C SC
L/
SD
A,
C
LK,
DA
TA
Side
Rear
DDR2 (2
56Mbit)
Qi
monda
/
H
y
ni
x
DDR2 (5
12Mbit)
Qi
monda
/
H
y
ni
x
DD
R_Data[0:15],
DQS,
D
M
…
A
ddr
.[
]
,
c
tr
l.
data
RF S
/W
T
M
DS351
HDMI S/W
DA
TA
,
Cl
oc
k
Se
le
ct
L
G
511O
Local Dimming
Data [0 …
15]
A
DD
[0…15]
clock
- 19 -
500
510
320
560
310
120
121
200
300
805
801
802
803
804
530
540
520
400
550
810
900
570
200T
200N
A2
LV1
A10
LV2
EXPLODED VIEW
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
parts are identified by in the Schematic Diagram and EXPLODED VIEW.
It is essential that these special safety parts should be replaced with the same components as
recommended in this manual to prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
IMPORTANT SAFETY NOTICE
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