Read LG 55LH95 / 55LHX (CHASSIS:LA92E) Service Manual online
1. Application Object
This specification sheet applied to LA92E Chassis applied
LCD TV all models manufactured in TV factory.
LCD TV all models manufactured in TV factory.
2. Notes
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.
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
3) The adjustment must be performed in the circumstance of
25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.
there is no specific designation.
4) The input voltage of the receiver must keep 100~240V,
50/60Hz.
5) The receiver must be operated for about 5 minutes prior to
the adjustment when module is in the circumstance of over
15°C.
15°C.
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.
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.
15°C for 3 hours.
6) The TV and the Media-box must be connected by Wireless
or Wire. : Even if there is only the TV set, it is possible to
adjust the White balance.
adjust the White balance.
• Entry process of White Pattern
1) Press the POWER ON key on R/C for adjustment.
2) Press the ADJ key on R/C and enter EZ ADJUST.
3) Select ‘7. Test Pattern’ by using CH +/- key and select
2) Press the ADJ key on R/C and enter EZ ADJUST.
3) Select ‘7. Test Pattern’ by using CH +/- key and select
“White” by using VOL +/-.
* Set is activated HEAT RUN without signal generator in this
mode.
* Single color pattern (RED/BLUE/GREEN) of HEAT RUN
mode uses to check panel.
Caution) If the still image is displayed more than 20 minutes
(Especially digital pattern, cross hatch pattern), an after-
image may occur in the black level area of the screen.
image may occur in the black level area of the screen.
3. Adjustment list
• Check the TOOL OPTION prior to adjustment. If the TOOL
OPTION is incorrect, correct it then execute the power
off/on to apply the modification (refer to 7.3 TOOL
OPTION)
off/on to apply the modification (refer to 7.3 TOOL
OPTION)
• In case of this chassis,
Set the Media-box option in connection with Wireless or Wire.
Set the TV option in HDMI5 mode. (remove the wired HDMI
Set the TV option in HDMI5 mode. (remove the wired HDMI
cable)
3.1 Board-level adjustment
•ADC adjustment (Media-Box ONLY)
•EDID/DDC download
•EDID/DDC download
* Manual ADC Confirmation : [IN-START] -> [1.Adjust Check]
•After Board level adjustment, set volume setting value 0
•After Board level adjustment, set volume setting value 0
3.2 Final assembly adjustment
•White Balance adjustment
•RS-232C functionality check
•EYE-Q TEST
•Wireless Pairing (it is worked in the Wired status)
•Shipment mode setting (In-Stop)
•RS-232C functionality check
•EYE-Q TEST
•Wireless Pairing (it is worked in the Wired status)
•Shipment mode setting (In-Stop)
3.3 Etc
•Shipment mode
•Service Option
•Service Option
4. Board-level adjustment
4.1 ADC(LGE3369) adjustment
4.1.1 Overview
•ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate
RGB deviation.
and gain in Analog-to-Digital device and to compensate
RGB deviation.
- Adjustment : ADC Comp Comp 480i
=> Using a Pattern Generator(MSPG-925FA - Model:209,
Pattern:65 or etc), enter component signals like below
image into the Media-box.
image into the Media-box.
- Adjustment : ADC Comp 1080p / RGB
- 11 -
ADJUSTMENT INSTRUCTION
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