LG 47LW9800, Service Manual

Page: 13 / 74

LGE Internal Use Only Copyright LG Electronics. Inc. All right reserved.
Only for training and service purposes - 13 -
ADJUSTMENT INSTRUCTION
1. Application range
This spec. sheet applies to LA12D 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 Final assembly adjustment
• EDID/DDC download
• White Balance adjustment
• RS-232C functionality check
• Factory Option setting per destination
• Ship-out mode setting (In-Stop)
3.2 Etc
• Ship-out mode
• Tool option menu
• USB Download(S/W Update, Option, Service only)
3.3. Automatic Adjustment
3.3.1 ADC Adjustment (GP3 BCM35230)
3.3.1.1 Overview
• ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation.
3.3.1.2 Equipment & Condition
1) Jig (RS-232C protocol)
2) MSPG-925 Series Pattern Generator(MSPG-925FS)
- Resolution : 480i Comp1 (MSPG-925FS: model-209,
pattern-65)
- Resolution : 1080p Comp1 (MSPG-925FS: model-225,
pattern-65)
- Resolution : 1920*1080 RGB (MSPG-925FS: model-225,
pattern-65)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
- Image
3.3.1.3 Adjustment
3.3.1.3.1 Adjustment method
• Using RS-232, adjust items listed in 3.1 in the other
shown in “4.1.3.3”
3.3.1.3.2 Adj. protocol
Ref.) ADC Adj. RS232C Protocol_Ver1.0
3.3.1.3.3 Adj. order
• aa 00 00 [Enter ADC adj. mode]
• xb 00 40 [Change input source to Component1
(480i/1080p)]
• ad 00 10 [Adjust 480i//1080p Comp1]
• xb 00 60 [Change input source to RGB(1920*1080)]
• ad 00 10 [Adjust 1920*1080 RGB]
• ad 00 90 End adj.
Chassis Model Name
Module
type
Local
dimming
THX Remark
42/47/55LW7500-NB Edge LED O X 1 point W/B adjustment
42/47/55LW7700-NA
47/55LW7700-UA
ALEF O TB
O
D TBD
47/55LW9500-NA
47/55LW9600-NA
ALEF O X 1 point W/B adjustment
60LW9600-NA IOP LED O X 1 point W/B adjustment
LA12D
47/55/60LW9500-UA
ALEF/IOP
LED
O 5 point W/B adjustment
Protocol Command Set ACK
Enter adj. mode aa 00 00 a 00 OK00x
Source change xb 00 40
xb 00 60 b 00 OK40x (Adjust 480i /1080p Comp1 )
b 00 OK60x (Adjust 1920*1080 RGB)
Begin adj. ad 00 10
Return adj. result OKx (Case of Success)
NGx (Case of Fail)
Read adj. data (main)
ad 00 20
(sub )
ad 00 21 (main)
000000000000000000000000007c007b006dx
(Sub)
000000070000000000000000007c00830077x
Confirm adj. ad 00 99 NG 03 00x (Fai l)
NG 03 01x (Fai l)
NG 03 02x (Fai l)
OK 03 03x (Success)
End adj. aa 00 90 a 00 OK90x