Adjustment Instruction; Main Pcba Adjustments; Adc Calibration; Main Pcba Check Process - LG 42LE5400 Service Manual
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Also See for 42LE5400:
- Owner's manual (136 pages) ,
- Specifications (2 pages) ,
- Owner's manual (39 pages)
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1. Application range
This spec sheet is applied to LA02D & LA02E Chassis applied
LCD TV all models manufactured in TV factory
2. Specification
2.1 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.
2.2 Adjustment must be done in the correct order.
2.3 The adjustment must be performed in the
circumstance of 25±5°C of temperature and 65±10%
of relative humidity
2.4 The input voltage of the receiver must keep
100~240V, 50/60Hz.
2.5
The receiver must be operated for about 5 minutes
prior to the adjustment when module is in the
circumstance of over 15. 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 check process
• ADC adjustment: Component 480i, 1080p / RGB-PC 1080p
• EDID downloads for HDMI and RGB-PC
Remark) Above adjustment items can be also performed in
Final Assembly if needed. Adjustment items in
both PCBA and final assembly stages can be
checked by using the INSTART Menu
1.ADJUST CHECK.
3.2 Final assembly adjustment
•White Balance adjustment
•RS-232C functionality check
•Factory Option setting per destination
•Ship-out mode setting (In-Stop)
•GND and HI-POT test
3.3 Appendix
• Tool option menu, USB Download (S/W Update, Option and
Service only)
• Manual adjustment for ADC calibration and White balance.
• Shipment conditions, Channel pre-set
Copyright
LG Electronics. Inc. All right reserved.
Only for training and service purposes
ADJUSTMENT INSTRUCTION
- 10 -
4. MAIN PCBA Adjustments
4.1. ADC Calibration
(1) Overview
ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate
RGB deviation.
(2) Equipment & Condition
1) Jig (RS-232C protocol)
2) MSPG-925 Series Pattern Generator(MSPG-925FA)
- Resolution : 480i Comp1 (MSPG-925FA: model-209,
pattern-65)
- Resolution : 1080p Comp1 (MSPG-925FA: model-225,
pattern-65)
- Resolution : 1080p RGB (MSPG-925FA: model-225,
pattern-65)
- Pattern: Horizontal 100% Color Bar Pattern
- Pattern level: 0.7±0.1 Vp-p
- Image
(3) Adjustment
1) Adjustment method
- Using RS-232, adjust items listed in 3.1 in the other
shown in "4.1.3.3"
2) Adj. protocol
Ref.) ADC Adj. RS232C Protocol_Ver1.0
3) Adj. order
• aa 00 00 [Enter ADC adj. mode]
• xb 00 40 [Change input source to Component1(No
action)]
• ad 00 10 [Adjust 480i Comp1]
• ad 00 10 [Adjust 1080p Comp1]
• xb 00 60 [Change input source to RGB(No action)]
• ad 00 10 [Adjust 1080p RGB]
• ad 00 90 End adj.
LGE Internal Use Only
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