DOWNLOAD LG 37LV355H-ZA (CHASSIS:LD0AZ) Service Manual ↓ Size: 10.08 MB | Pages: 62 in PDF or view online for FREE

Model
37LV355H-ZA (CHASSIS:LD0AZ)
Pages
62
Size
10.08 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37lv355h-za-chassis-ld0az.pdf
Date

LG 37LV355H-ZA (CHASSIS:LD0AZ) Service Manual ▷ View online

- 12 -
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.
- Adjust sequence
· Press the PIP key of the Adjustment 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 “
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.)
· 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 Service remote control, Red
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.
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
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
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 EEPROM,.
5.3. Method & notice
A. Serial number D/L is using of scan equipment.
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.
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
Po w e r  
Blo ck
V
COM
Ga mma
Re f e r e nce V o ltage
Gamm a Reference
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
In
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
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 Adjustment remote control.
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” key 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
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.
1) Into the main assembly 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
2. Check the method of CI+ Key value. (RS232)
1) Into the main assembly 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
- 13 -
CMD 1
CMD 2
Data 0
A
A
0
CMD 1
CMD 2
Data 0
C
I
1
CMD 1
CMD 2
Data 0
A
A
0
CMD 1
CMD 2
Data 0
C
I
2
CI+ key Value
- 14 -
BLOCK DIAGRAM
RGB
COMP
ON
ENT
F-SC
A
R
T
IF_N
/P
_MST
A
R
DDR3 (2
GB)
IC
1201
NAND Flas
h
HY
NI
X(2G
)
IC
102
USB
Digital am
p
(N
T
P
7100
)
IC
501
COMP_Y
/Pb/p
R
S
C
1_
C
V
B
S
/R
/G/B/F
B_I
N
I2
S
DS
UB_
 R
/G
/B
Tuner 
(TDTJ-
S001D)
TU3702
LED P
an
e
l
CI Slot
(P1902)
74LCX244
Buffer
IC1902
PCM_A
[0
:7
]
TU_CVBS
PCM_A
[0
:7
]
DDR3 (1
GB)
IC
1202
B_
T
M
D
Q
[0
:16]
Mstar
S7
LGE101DC-R
(I
C101)
AQ
Z1073ATL
-3
U
S
B Pow
er
 
IC
402
U
S
B Pow
er
S
C
1_L/
R_
IN
, E_A
M
_
A
U
D
IO
,AV_L/
R
_
IN
C
O
M
P
_L/
R
_
IN
, P
C
_L/
R_
IN
 
TV/
D
TV_VOUT
A_
T
M
D
Q
[0
:16]
Head 
Phon
e
R
S
-232
C
M
A
X3232
C
D
R
IC
1100
SP
DI
F
SPDIF_
O
U
T
DS
UB_
H
/VS
YNC
HP_
L
/R
O
UT
L/R
P
I_
T
S_
D
A
T
A
[0
:7]
F
E
_T
S_
D
A
TA
[0:7]
CI_
ADDR[
0:
7
]
NEC_
TX
/RX
HPD1
/2
HDMI_
CEC, 5
V
_HDMI 1
/2
TMDS[
0:
7
] ( D
a
ta
, Clock (+/-))
EE
PRO
M
M24M
0
1-HRMN6
(I
C
104
)
EE
PRO
M
CAT2
4WC0
8W-
T
(HDCP)IC10
3
I2
C
LVDS (8bit or 
10 bit)
S
erial Flash
IC
1401
F
or Boot
HDMI 1
/2
M
P
2305
IC
2201
DC/DC Co
nv.
(1
2V
 t
o
 5V)
M
P
5000
IC
2202
5V
12V
Po
w
er S
W
(1
2V
 On/O
ff
)
NEC Micom
uPD78F1164A
(I
C1102)
L
E
D Driver
I2
C
 SW
I2
C
I2
C
I2
C
MST_
TX
/RX
LED C
lo
c
k
S
p
ea
ke
r O
u
t
A
u
dio amp
(T
P
A
3124
D2
)
L/
R
S
p
ea
ke
r O
u
t
Contr
ol
Up/D
o
w
n
TU_
SI
F
IF_AGC
74LV
C
16244
Bu
ffe
r
IC
1501
LGDT1129
FPGA
IC1503
FE
_T
S
_DAT
A[
0
]
PKT_DATA[
0]
C
I_T
S_
DA
T
A
[0
:7]
R
S
-232
C
M
A
X3232
C
D
R
US
B_D
M
/D
P
(I
C
104
)
12V
IC
5005/5006
I2
C
I2
C
I2
C
IC
1500
- 15 -
A2
A10
* Set + Stand
* Stand Base + Body
300
200
510
810
910
900
511
560
710
120
400
LV
1
700
530
540
521
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.
IMPORTANT SAFETY NOTICE
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