LG 47LV3500-ZA / 47LV3550-ZB / 47LV355A-ZB / 47LV355C-ZB / 47LV355N-ZB / 47LV355U-ZB (CHASSIS:LD01U) Service Manual ▷ View online
4.5. V-COM Adjust(Only LGD(M+S) Module)
- Why need Vcom adjustment?
A
The Vcom (Common Voltage) is a Reference Voltage of
Liquid Crystal Driving.
-> Liquid Crystal need for Polarity Change with every frame.
Liquid Crystal Driving.
-> Liquid Crystal need for Polarity Change with every frame.
- Adjust sequence
· Press the PIP key of th ADJ remote control.(This PIP key is
hot key to enter the VCOM adjusting mode)
(Or After enter Service Mode by pushing “ADJ” key, then
Enter V-Com Adjust mode by pushing “
Enter V-Com Adjust mode by pushing “
G
” key at “10. V-
Com”.)
· As pushing the right or the left key on the remote control,
and find the V-COM value which is no or minimized the
Flicker. (If there is no flicker at default value, Press the exit
key and finish the VCOM adjustment.)
Flicker. (If there is no flicker at default value, Press the exit
key and finish the VCOM adjustment.)
· Push the “OK” key to store value. Then the message
“Saving OK” is pop.
· Press the exit key to finish VCOM adjustment.
(Visual Adjust and control the Voltage level)
4.6. Outgoing condition Configuration
When pressing IN-STOP key by SVC remote control, Red
LED are blinked alternatively. And then Automatically turn off.
(Must not AC power OFF during blinking)
LED are blinked alternatively. And then Automatically turn off.
(Must not AC power OFF during blinking)
4.7. Hi-pot Test
Confirm whether is normal or not when between power
board’s ac block and GND is impacted on 1.5 kV(dc) or 2.2
kV(dc) for one second.
board’s ac block and GND is impacted on 1.5 kV(dc) or 2.2
kV(dc) for one second.
5. Model name & Serial number D/L
• Press “Power on” key of service remote control.
(Baud rate : 115200 bps)
• Connect RS232 Signal Cable to RS-232 Jack.
• Write Serial number by use RS-232.
• Must check the serial number at the Diagnostics of SET UP
• Write Serial number by use RS-232.
• Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below).
5.1. Signal TABLE
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +…+ Data_n
Delay : 20ms
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +…+ Data_n
Delay : 20ms
5.2. Command Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write : Model Name and Serial Number write in
EEPROM,.
5.3. Method & notice
A. Serial number D/L is using of scan equipment.
B. Setting of scan equipment operated by Manufacturing
B. Setting of scan equipment operated by Manufacturing
Technology Group.
C. Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
by D-book 4.0.
- 13 -
CMD
LENGTH
ADH
ADL
DATA_1
. . .
Data_n
CS
DELAY
Row Li ne
Column Line
C
LC
C
ST
Pane l
S
Y
S
T
E
M
Gat
e
Driv
e
IC
So urce D r i v e I C
Circuit Block
Ti m i n g
Co nt r o ll e r
Co nt r o ll e r
Po w e r
Blo ck
Blo ck
V
COM
Ga mma
Re f e r e nce V o ltage
Re f e r e nce V o ltage
Gamm a Reference
Volta ge
Volta ge
Data (R ,G,B ) & C ont ro l s ignal
Con t rol si gnal
Data (R ,G,B ) &
Con t rol si gnal
Con t rol si gnal
In
te
te
rf
a
c
e
TFT
Po w e r I n p u t
Power Input
Da t a I n p u t
Da t a I n p u t
V
COM
Liquid
Crys tal
Crys tal
V
COM
No.
Adjust mode
CMD(hex)
LENGTH(hex)
Description
1
EEPROM WRITE
A0h
84h+n
n-bytes Write(n=1~16)
* Manual Download (Model Name and Serial Number)
If the TV set is downloaded by OTA or Service man, Sometimes
model name or serial number is initialized.(Not always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the ‘instart’ key of ADJ remote controller.
2) Go to the menu ‘5.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 42LD450-ZA) or Serial
model name or serial number is initialized.(Not always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the ‘instart’ key of ADJ remote controller.
2) Go to the menu ‘5.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 42LD450-ZA) or Serial
number like photo.
4) Check the model name Instart menu -> Factory name
displayed (ex 42LD450-ZA)
5) Check the Diagnostics (DTV country only) -> Buyer model
displayed (ex 42LD450)
6. CI+ Key Download method
(1) Download Procedure
1) Press "Power on" button of a service remote control.
(Baud rate : 115200 bps)
2) Connect RS232-C Signal Cable.
3) Write CI+ Key through RS-232-C.
4) Check whether the key was downloaded or not at ‘In
3) Write CI+ Key through RS-232-C.
4) Check whether the key was downloaded or not at ‘In
Start’ menu. (Refer to below).
=> Check the Download to CI+ Key value in LGset.
1. check the method of CI+ Key value
a. check the method on Instart menu
b. check the method of RS232C Command
b. check the method of RS232C Command
1) into the main ass’y mode (RS232 : aa 00 00)
2) check the key download for transmitted command
(RS232 : ci 00 10)
3) result value
- normally status for download : OKx
- abnormally status for download : NGx
- abnormally status for download : NGx
2. Check the method of CI+ Key value (RS232)
1) into the main ass’y mode (RS232 : aa 00 00)
2) Check the method of CI+ key by command (RS232 :
ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
7. Local Dimming Function Check
Step1) Turn on TV.
Step2) Press “P-only” key, entrance to power only mode and
Step2) Press “P-only” key, entrance to power only mode and
Press “Exit” key
Step3) Press “Tilt” key, entrance to Local Dimming mode.
Step4) At the Local Dimming mode, module Edge Backlight
Step4) At the Local Dimming mode, module Edge Backlight
moving right to left Back light of module moving
Step5) confirm the Local Dimming mode
Step6) Press “Exit” key
Step6) Press “Exit” key
- 14 -
CMD 1
CMD 2
Data 0
A
A
0
0
CMD 1
CMD 2
Data 0
C
I
1
0
CMD 1
CMD 2
Data 0
A
A
0
0
CMD 1
CMD 2
Data 0
C
I
2
0
CI+ key Value
- 15 -
BLOCK DIAGRAM
NA
N
D
Fl
a
s
h
(8
G
b
)
Au
d
io
AM
P
PC
MC
IA
Tu
n
e
r_
C
V
B
S
US
B
CO
M
P
1
A/
V
1
SC
A
R
T
RS
-2
3
2
C
PC
-R
G
B
PC
-A
U
D
IO
SP
D
IF
SY
ST
E
M
DDR
3
X 1
6
X 2
(2
G
b
)
51P
HDM
I
1
HDM
I
2
HDM
I
3
H/
P
S
Y
S
T
EM
EEP
R
O
M
X
1
(1
M
b
)
TU
N
E
R
(T
/
C
)
41P
SP
I
Fl
a
s
h
(2
M
b
)
SY
ST
E
M
DDR
3
X 1
6
X 1
(1
G
b
)
Tu
n
e
r_
S
IF
SC
L
/
SD
A
C
I_
T
S
_
D
A
T
A
[7
:0
]/C
L
K
/V
a
lid
/S
y
n
c
C
I_D
A
T
A
[7:
0]
CI
_
A
D
D
R
[1
4
:0
]
F
E
_
T
S
_
D
A
T
A
[0
]/C
L
K
/V
a
lid
/S
y
n
c
US
B
_
D
M
/D
P
HP
_
O
UT
DS
UB
_
R
G
B
/ HV
sy
n
c
DD
C
_
S
D
A
/U
A
R
T
_
T
X
PC_
A
u
d
io
I
N
SPD
IF
_
O
U
T
D
e
bug _T
X
/R
X
SC_
C
V
B
S/
R
G
B
/L
R
_
IN
SC_
V
ID
E
O
/L
R
_
O
U
T
AV_
C
V
B
S
/L
R
_
IN
CO
M
P
_
Y
P
b
P
r/
L
R
_
IN
HDM
I_
T
M
D
S
/HP
D/
C
E
C
HDM
I_
T
M
D
S
/HP
D/
C
E
C
HDM
I_
T
M
D
S
/HP
D/
C
E
C
I2
S
_
I/F
SCL
/S
D
A
30P
Si
d
e
Rear
DA
T
A
Vi
d
e
o
Au
d
io
DA
T
A
Vi
d
e
o
Au
d
io
Su
b
M
ic
o
m
(N
E
C
)
HDC
P
E
E
P
R
O
M
X
1
(8
K
b
)
Fo
r FR
C
SP
I
Fl
a
s
h
(8
M
b
)
SCL
/S
D
A
SCL
/S
D
A
L
G
E10
1
(S7R)
L
G
E10
7
(S7+URS
A
)
- 16 -
A2
A21
A10
51
1
320
510
310
A5
* Set + Stand
* Stand Base + Body
LV
1
300
200
400
900
120
800
530
540
521
910
710
700
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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