42LH90QD (CHASSIS:LT91C) - LG TV Service Manual (repair manual). Page 13

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* USB DOWNLOAD(*.epk file download)
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
- If your downloaded program version in USB Stick is Low,
it didn’t work. But your downloaded version is High, USB
data is automatically detecting
(3) Show the message “Copying files from memory”
(4) Updating is staring.
(5) After updating is complete, The TV will restart automatically.
(6) If  TV  turns  on,  check  your  updated  version  and  Tool
option. (refer to the next page about tool option)
* If  downloading  version  is  higher  than  your  TV  have,  TV
can  lost  all  channel  data.  In  this  case,  you  have  to
channel recover. If all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
* After downloading, have to adjust Tool Option again.
1. Push "IN-START" key in service remote controller.
2. Select "Tool Option 1" and Push “OK” button.
3. Punch in the number. (Each model has their number.)
4. Completed selecting Tool option.
3.1. ADC Process
• Input signal : Component 
• Signal equipment displays
Adjustment pattern
- Component 480I
MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator(MSPG-925 SERIES)
• Input Signal : RGB  (You  don’t  need  to  connect  RGB  Cable).
Because We use TV internal pattern.
G
”  key  at  “5.  ADC
Calibration”
* Caution: Using ‘power on’ button of the Adj. R/C, power on TV.
* ADC Calibration Protocol (RS232)
* Adjustment can be done using only external ADC
* Required equipment : Adjustment R/C.
* Down Load data of picture
This process must do in using the LED model
- Push the button “Power Only “ key in Adjust remote control
- Push the button “ Exit” key in Adjust remote control
3.2. Function Check
(1) Check display and sound
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI 
6) PC Audio In 
* Display and Sound check is executed by remote control.
- 13 -
Model 
Tool option1  Tool option2 Tool option3  Tool option4
42LH90QD
25411
3144
55462
20736
47LH90QD
33603
3144
55462
20736
55LH90QD
45891
3144
55462
20736
 
 
i
TV Software Upgrade
Upgrading...
Do not plug off!
63%
 
 
 
 
 
i
TV Software Upgrade
Upgrading COMPLETED
The TV will restart after    seconds.
100%
EZ ADJUT
0. Tool Option1  
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test Pattern
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
ADC Calibration
ADC Comp 480i
ADC Comp 1080p
ADC RGB
NG
NG
NG
Reset
Start
 
 
i
TV Software Upgrade
Copying files from memory
Do not remove the memory card from the pc
Do not plug off!
NO
Item 
CMD1 CMD2
Data0 
Data 1
Main total mode 
0
0
2  Change to Component  X 
0
Adjust Component 
0
Change to RGB 
0
Adjust RGB 
0
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