DOWNLOAD LG 22LN4000 (CHASSIS:LM91N) Service Manual ↓ Size: 5.41 MB | Pages: 27 in PDF or view online for FREE

Model
22LN4000 (CHASSIS:LM91N)
Pages
27
Size
5.41 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
22ln4000-chassis-lm91n.pdf
Date
PREV: LG 22LN45XX / 22LN4500 (CHASSIS:LJ31A) Service Manual

LG 22LN4000 (CHASSIS:LM91N) Service Manual ▷ View online

- 9 -
(1) RGB EDID Data
1) All data are HEXA
2) Adjustable Data : 
**: week 
***: year ex) when year 2008: input “12”
****: CHECK SUM (deferent along week, year)
5. Check of White Balance
RGB_Gains are fixed data for each model.
Insert D-sub jack (I2C) which is connected with PC 
for White Balance or equivalent device.
→  Total Assembly line should be check whether the 
color  coordinate(x,  y)  data  Refer  to  below  table 
were meet or not.
5.1. Required Equipment
■ Remote controller for checking W/B
■ Color Analyzer : CA-210 
■ CH: 14 (LCD MNT, Normal) → 22LN4000
■ PC (for communication through RGB) 
■ Pattern Generator (MSPG-925FS series)
5.2.  Connecting  diagram  of  equipment  for 
measuring(For Automatic Adjustment)
(Method 1, using IIC, You connect RGB Cable)
(Standard  color  coordinate  and  temperature  when  using  the 
CA210 equipment)
RGB_Gains are fixed data for each model 
* When doing Adjustment, Please make circumstance as below.
* W/B condition
- Ambient Humidity        : 20 % ~ 80 %
- Ambient Temperature  : 25 ± 5 °C
6. Function Check
6.1. Check display and sound 
■ Check input and Signal items. (cf. work instructions) 
1. TV
2. AV (CVBS)
3. RGB (PC : 1366 x 768 @ 60hz)(Display only)
4. HDMI
7. Preset CH writes condition
(1) AC on time on only one after assembled automatically
(2) CH recover on SVC OSD manually
Color
Temperature
Cool
13,000k °K x = 0.269 (±0.03)
y = 0.273 (±0.03)
<Test Signal>
RF/AV
Inner pattern
(216gray, 85IRE)
Medium 9,300k
°K x = 0.285 (±0.03)
y = 0.293 (±0.03)
Warm
6,500k
°K X=0.313 (±0.03)
Y=0.329 (±0.03)
Luminance
(cd/m2)
Cool
Min: 150
Typ : 200
<Test Signal>
(Full white,
100IRE)
Medium Min: 150
Typ : 200
Warm
Min: 150
Typ : 200
System Control 2
EDID Download 
 
►
Channel Recover   
►
UTT Reset 
 
►
- 10 -
TROUBLE SHOOTING
1. NO POWER-Main PCBA
pšGh‹ˆ—›Œ™G
vœ›—œ›G}vs{hnlG X`U[}
›™–œŽG–G qr^WWf
NO POWER
pšGZUZ}G ˆ›G j^^Xf
jŒŠ’GžˆŒ–™”G –G ]WWG
YES
NO
YES
NO
YES
check open or short at Line.
or change Adapter.
check the Lines of IC701,
If there is any problem at Line, 
Change IC701
NO
Check Line short or open between 
IC600 and X600,
Change IC600  or change X600
1
2
4
pšG\}Gˆ›Gj^X]f
šGXUX}G ˆ›Gj^Z^f
3
YES
check the Lines of IC704,IC706
If there is any problem at Line, 
Change IC704,IC706.
NO
Insert F/W
šGZUZ}G ˆ›GXY—•G –G wXYWf
žŒ•G—œšG—–žŒ™G’Œ S
pšGWG ˆ›GY—•G–G wXYWf
Change control
Or check Line short or open of P120
5
šG›Œ™ŒGˆ• GžˆŒ™Gˆ›G XX—•G–G wXYWS
žŒ•GœšŒG™Œ”–›ŒGŠ–•›™–““Œ™fG
6
NO
YES
change IR board
Or check Line short or open of P120
NO
4
]WW
- 11 -
2. No raster (Power LED blue, black screen)
pšGX`U[}G ˆ›Gqr^WWf
NO RASTER
(Screen is not displayed)
Insert the F/W back
or REPLACE LCD MODULE
pšGXUX}G ˆ›G s^WXf
pšGZUZ}G ˆ›G s^XYf
pšGXUY\}G ˆ›GY—•G–G pj^WYf
pšGYU\}G ˆ›G Y—•G–G pj^WZf
YES
NO
YES
NO
YES
Check Line short or open between
IV701/IC704  and IC600,
If there is any problem at Line, 
Change IC701/IC704  or change IC600
NO
check open or short at Line and wafer
between IC702,IC703  and IC600.
If there is any problem at Line, 
Change IC702,IC703  or IC600
1
2
šGZ}Gˆ›GX—•G–G pj_WXf
YES
It is not over 3V at 1pin of IC801.
Change Q801.
Or check Line short or open between
R803 and 95pin of IC600.
Change IC 600.
4
3
NO
check open or short at Line.
or change Adapter
pšGXY}G ˆ›GX—•G–G wXWXf
If is not under 1.5V at R744, 
change Q702 or check open and short 
of Line among Q703 and Q702.
If is under 10.8V at L710,
Check open and short 
Of line between L710 and P101.
6
NO
wœ›G•›–Gs}kzGŠˆ‰“ŒGŠ–”—“Œ›Œ“ f
s}kzGŠˆ‰“ŒGˆŒG‹ˆ”ˆŽŒf
NO
If LVDS cable isn’t insulted enough, 
Insult LVDS cable until locking hook.
If LVDS cable have damage,
Change LVDS cable
5
YES
YES
- 12 -
3. Abnormal/No screen (All input)-Main PCBA
wœ›G•›–Gs}kzGŠˆ‰“ŒGŠ–”—“Œ›Œ“ f
s}kzGŠˆ‰“ŒGˆŒG‹ˆ”ˆŽŒf
Abnormal/No screen
(all input)
jŒŠ’GžˆŒ–™”G ˆ›GšŽ•ˆ“G
“•ŒG–G wYWXG Oj“–Š’aXWSXXSYYSYZ
kˆ›ˆaG_S`SXYSXZSX\SX]SX_SX`SYWS
YXSY\SY]SY^SY_SY`SZWP
YES
NO
YES
NO
YES
If LVDS cable isn’t insulted enough, 
Insult LVDS cable until locking hook.
If LVDS cable have damage,
Change LVDS cable
1
Change module
WAVEFORMS
3
pšGXY}G ˆ›GX—•G–G wXWXf
If is not under 1.5V at R744, 
change Q702 or check open and short 
of Line among Q703 and Q702.
If is under 10.8V at L710,
Check open and short 
Of line between L710 and P101.
2
3
NO
Check open and short 
Of line between Q703 and P101.
Or Check  LVDS cable have damage.
Another is change IC600.
_S`SXYSXZSX\SX]SX_SX`SYWSYXS
Y\SY]SY^SY_SY`SZWw•G –G wYWX
Okˆ›ˆGs•ŒP
XWSXXSYYSYZw•G –G wYWX
Oj“–Š’G“•ŒP
Page of 27
Display

Click on the first or last page to see other 22LN4000 (CHASSIS:LM91N) service manuals if exist.

RANDOM: