Copyright © LG Electronics. Inc. All rights reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LED TV with
LA5CJ chassis.
2. Specification
(1) Because this is not a hot chassis, it is not necessary to
use an isolation transformer. However, the use of isolation
transformer will help protect test instrument.
(2) Adjustment must be done in the correct order.
(3) The adjustment must be performed in the circumstance of
25 ±5
ºC
of temperature and 65±10% of relative humidity if
there is no specific designation
(4) The input voltage of the receiver must keep 100~240V,
50/60Hz
(5) At first Worker must turn on the SET by using Power Only
key.
(6) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15
ºC
In case of keeping module is in the circumstance of 0°C, it
should be placed in the circumstance of above 15°C for 2
hours
In case of keeping module is in the circumstance of below
-20°C, it should be placed in the circumstance of above
15°C for 3 hours.
※ Caution
When still image is displayed for a period of 20 minutes or
longer (especially where W/B scale is strong.
Digital pattern 13ch and/or Cross hatch pattern 09ch), there
can some afterimage in the black level area
3. Adjustment items
3.1. Main PCBA Adjustments
(1) Adjust RGB (ADC) : RGB-PC 1080P
(2) EDID/DDC download : HDMI and RGB-PC
* Remark
Above adjustment items can be also performed in Final
Assembly if needed. Both Board-level and Final assembly
adjustment items can be check using In-Start Menu 1.
ADJUST CHECK.
RGB-PC Adjust will be calculated by 480i adjust value.
3.2. Final assembly adjustment
(1) White Balance adjustment
(2) RS-232C functionality check
(3) Factory Option setting per destination
(4) Shipment mode setting (In-Stop)
(5) GND and HI-POT test
3.3. Appendix
(1) Ship-out mode
(2) Service Option Default
(3) USB Download(S/W Update, Option, Service only)
(4) ISP Download (Optional)
4. MAIN PCBA Adjustments
4.1. ADC Adjustment
4.1.1. ADC
■ Enter Service Mode by pushing “ADJ” key,
■ Enter Internal ADC mode by pushing “►” key at “8. ADC
Calibration”
* ADC Calibration Protocol (RS232)
Adjust Sequence
▪aa 00 00 [Enter Adjust Mode]
▪xb 00 40 [Component1 Input (480i)]
▪ad 00 10 [Adjust 480i Comp1]
▪xb 00 60 [RGB Input (1024*768)]
▪ad 00 10 [Adjust 1024*768 RGB]
▪aa 00 90 End Adjust mode
* Required equipment : Adjustment R/C.
4.2. EDID Download
4.2.1. Overview
- It is a VESA regulation. A PC or a MNT will display an
optimal resolution through information sharing without any
necessity of user input. It is a realization of “Plug and Play”.
4.2.2. Equipment
(1) Since EDID data is embedded, EDID download JIG, HDMI
cable and D-sub cable are not need.
(2) Adjust by using remote controller.
4.2.3. Download method
(1) Press Adj. key on the Adj. R/C,
(2) Select EDID D/L (PCM) menu.
(3) By pressing Enter key, EDID download will begin
(4) If Download is successful, OK is displayed, but If
Download is failure, NG is displayed.
(5) If Download is failure, Re-try downloads.
(Caution) When EDID Download, must remove RGB/HDMI
Cable.
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Enter Adjust
MODE
Adjust
‘Mode In’
A A 0 0
When transfer the ‘Mode In’,
Carry the command.
ADC adjust
ADC
Adjust
A D 1 0
Automatically adjustment (The
use of a internal pattern)
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