LG 22LF4520, Service Manual

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Only for training and service purposes
4. Total Assembly line process
*Connection
4.1. Tool option & ADC Check
1) Press “Power on” key of service remote control.
2) Connect D-SUB cable D-SUB jack for RS232.
3) Check the 'Tool Option' (Refer to the BOM Comments or
Adjustment spec)
4) Check the ‘ADC’ is ok
4.2. Model name & Serial number Down -
load
4.2.1. Model name & Serial number D/L
1) Press "Power on" key of service remote control.
2) Connect RS232 Signal Cable to RS-232 Jack.
3) Write Serial number by use RS-232.
4) Must check the serial number at the Diagnostics of SET UP
menu.
4.2.2. Method & notice
1) Model Name & Serial Number D/L is using of scan equip-
ment.
2) Setting of scan equipment operated by Manufacturing
Technology Group.
3) 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
4) Check the model name Instart menu → Factory name
displayed (ex 24LN4500)
5) Check the Diagnostics (DTV country only) → Buyer model
displayed (ex 24LN4500)
4.3. Function Check
4.3.1. Check display and sound
*Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (CVBS)
3) COMPONENT (480i)
4) HDMI
* Display and Sound check is executed by Remote controller.
→ Caution : Not to push the INSTOP KEY after completion if
the function inspection.
4.4. White balance adjustment
-Equipment
1) Color Analyzer: CA-210 (LED Module : CH 14)
2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
3) Adjust Remocon
RGB_Gains are fixed data for each model.
Insert RS-232C Jack 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.
Color coordinate is differ from panel’s characteristics of color
temperature. Please check panel characteristics about color
temperature.
- Warm Panel
*Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
▪ White Balance Default value
Color
Temperature
Cool 9,300k °K X=0.290 (±0.04)
Y=0.298 (±0.04)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium 8,000k °K X=0.300 (±0.04)
Y=0.310 (±0.04)
Warm 6,500k °K X=0.318 (±0.04)
Y=0.334 (±0.04)
Luminance
(cd/m²)
Cool Min : 80 Typ : 110 <Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 80 Typ : 110
Warm Min : 80 Typ : 110
Gain Cut
R G B R G B
MT77 22inch LGD
(AH-IPS /
FHD)
Cool 129 163 192 128 128 128
Medium 152 172 192 128 128 128
Warm 188 192 184 128 128 128
24inch CMI
(VA / HD)
Cool 171 172 208 128 128 128
Medium 192 192 188 128 128 128
Warm 192 162 122 128 128 128
29inch Cool 154 172 210 128 128 128
Medium 176 189 192 128 128 128
192 185 141 128 128 128