LG 32LH240H (CHASSIS:LA96A) Service Manual ▷ View online
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5. ADC Process
5.1 PC input ADC
5.1.1 Auto RGB Gain/Offset Adjustment
• Convert to PC in Input-source.
• Signal equipment displays.
• Convert to PC in Input-source.
• Signal equipment displays.
Output Voltage : 700 mVp-p
- Impress Resolution XGA (1024 x 768 @ 60Hz)
Model : 60 in Pattern Generator
Pattern : 65 in Pattern Generator (MSPG-925 SERISE)
Pattern : 65 in Pattern Generator (MSPG-925 SERISE)
Adjustment pattern (PC)
• Adjust by commanding AUTO_COLOR_ADJUST.
5.1.2 Confirmation
• We confirm whether “0xAA (RGB)” address of EEPROM
• We confirm whether “0xAA (RGB)” address of EEPROM
“0xA2” is “0xAA” or not.
• If “0xAA (RGB)” address of EEPROM “0xA2” isn’t “0xAA”, we
adjust once more.
• We can confirm the ADC values from “0xA4~0XA9 (RGB)”
addresses in a page “0xA2”
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “•” key at “ 5. ADC Calibration” and click “Start”.
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “•” key at “ 5. ADC Calibration” and click “Start”.
5.2 COMPONENT input ADC
5.2.1 Component Gain/Offset Adjustment
• Convert to Component in Input-source.
• Signal equipment displays.
• Convert to Component in Input-source.
• Signal equipment displays.
- Impress Resolution 480i
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MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator( MSPG-925 SERISE)
- Impress Resolution 1080p
PATTERN : 65 in Pattern Generator( MSPG-925 SERISE)
- Impress Resolution 1080p
MODEL: 223 in Pattern Generator(1080p Mode)
PATTERN: 65 in Pattern Generator( MSPG-925 SERISE)
PATTERN: 65 in Pattern Generator( MSPG-925 SERISE)
5.2.2 Confirmation
• We confirm whether “0xB3 (480i)/0xBC (1080p)” address of
• We confirm whether “0xB3 (480i)/0xBC (1080p)” address of
EEPROM “0xA2” is “0xAA” or not.
• If “0xB3 (480i)/0xBC(1080i)” address of EEPROM “0xA2”
isn’t “0xAA”, we adjust once more.
• We can confirm the ADC values from “0xAD~0XB2
(480i)/0XB6~BB(1080p)” addresses in a page “0xA2”
* Manual ADC process using Service Remocon. After enter
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “•” key at “ 5. ADC Calibration” and then click “Start”.
Service Mode by pushing “ADJ” key, execute “ADC Adjust” by
pushing “•” key at “ 5. ADC Calibration” and then click “Start”.
- Impress Resolution 480i/1080p/RGB
5.3 Function Check
5.3.1 Check display and sound
• Check Input and Signal items. ( cf. work instructions)
1.TV
2. AV (CVBS/ S-Video)
3.COMPONENT (480i)
4.RGB (PC : 1024 x 768 @ 60hz)
5.HDMI
6.PC Audio In and H/P Out
* Display and Sound check is executed by Remote controller.
• Check Input and Signal items. ( cf. work instructions)
1.TV
2. AV (CVBS/ S-Video)
3.COMPONENT (480i)
4.RGB (PC : 1024 x 768 @ 60hz)
5.HDMI
6.PC Audio In and H/P Out
* Display and Sound check is executed by Remote controller.
5.4 EDID(The Extended Display Identification Data)
/ DDC(Display Data Channel) download
5.4.1 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”.
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”.
5.4.2 Equipment
• Adj. R/C
• Since embedded EDID data is used, EDID download jig,
• Adj. R/C
• Since embedded EDID data is used, EDID download jig,
HDMI cable and D-sub cable are not need.
5.4.3 Download method
1) Press Adj. key On the Adj. R/C, press Adj. key then select
1) Press Adj. key On the Adj. R/C, press Adj. key then select
EDID D/L. By pressing Enter key, EDID download will
begin.
begin.
2) If Download is successful, OK is displayed.
3) If Download is a failure, NG is displayed.
4) Re-try download.
3) If Download is a failure, NG is displayed.
4) Re-try download.
5.4.4 EDID DATA
•Reference: Download is only possible in POWER ON MODE.
•Reference: Download is only possible in POWER ON MODE.
• HDMI I [C/S: 1DBA]
• HDMI II [C/S: 1DAA]
• RGB [C/S: 71FF]
6. Final Assembly adj.
6.1 White Balance adj.
6.1.1 Overview
•W/B adj.: Objective & How-it-works
- Objective: To reduce each Panel’s W/B deviation
- How-it-works : When R/G/B gain in the OSD is at 192, it
•W/B adj.: Objective & How-it-works
- Objective: To reduce each Panel’s W/B deviation
- How-it-works : When R/G/B gain in the OSD is at 192, it
means the panel is at its Full Dynamic Range.
In order to prevent saturation of Full Dynamic
range and data, one of R/G/B is fixed at 192,
and the other two is lowered to find the
desired value.
range and data, one of R/G/B is fixed at 192,
and the other two is lowered to find the
desired value.
6.1.2 Equipment
1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED
1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /LED
Module:CH14)
2) Adj. Computer (During auto adj., RS-232C protocol is
needed)
3) Adj. R/C
4) Video Signal Generator MSPG-925F 720p/216Gray
4) Video Signal Generator MSPG-925F 720p/216Gray
(Model:217, Pattern:78)
-> Only when internal pattern is not available
•Color Analyzer Matrix should be calibrated using CS-1000
6.1.3 Equipment connection map
6.1.4 Adj. Command (Protocol)
•Protocol
•Protocol
<Command Format>
- LEN: Number of Data Byte to be send
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
•Adj. Map
- Applied model:
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Color Analyzer
Computer
RS-232C
# Pattern Generator
* If TV internal pattern is used,not needed
Signal Source
Probe
RS-232C
RS-232C
START 6E A 50 A
LEN A 03 A
CMD A 00 A
VAL A CS A
STOP
RS-232C COMMAND
[CMD ID DATA]
[CMD ID DATA]
Explanation
Wb
00
00
Begin White Balance adjust.
Wb
00
10
Begin Gain adjust (internal white pattern)
Wb
00
1f
End Gain adjust
Wb
00
20
Begin Offset adjust (internal white pattern)
Wb
00
2f
End Offset adjust
Wb
00
ff
End White Balance adjust(internal pattern
disappears )
disappears )
Item
Command
(lower case ASCII)
(lower case ASCII)
Data Range
(Hex.)
(Hex.)
Default
(Decimal)
(Decimal)
CMD1 CMD2 MIN MAX
R Gain
j
g
00
C0
TBD
G Gain
j
h
00
C0
TBD
B
Gain
j i 00
C0 TBD
R
Cut
TBD
G
Cut
TBD
Cool
B
Cut
TBD
R Gain
j
a
00
C0
TBD
G Gain
j
b
00
C0
TBD
B Gain
j
c
00
C0
TBD
R
Cut
TBD
G
Cut
TBD
Medium
B
Cut
TBD
R Gain
j
d
00
C0
TBD
G Gain
j
e
00
C0
TBD
B Gain
j
f
00
C0
TBD
R
Cut
TBD
Warm
G
Cut
TBD
6.1.5 Adj. method
6.1.5.1 Auto adj. method
1) Set TV in adj. mode using POWER On Key
2) Zero calibrate probe then place it on the center of the
6.1.5.1 Auto adj. method
1) Set TV in adj. mode using POWER On Key
2) Zero calibrate probe then place it on the center of the
Display
3) Connect Cable(RS-232C)
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status per
4) Select mode in adj. Program and begin adj.
5) When adj. is complete (OK Sign), check adj. status per
mode (Warm, Medium, Cool)
6) Remove probe and RS-232C cable to complete adj.
• Adj. must begin w/ command “wb 00 00”, and end w/“wb 00
ff”and adj. offset if needed.
6.1.5.2 Manual adj. method
Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off
Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off
1) Set TV Picture Mode to Standard and in Advanced Control,
set Dynamic Contrast and Color ‘Off’.
2) Set TV in adj. mode using POWER On Key
3) Press ADJ key -> EZ adjust using adj. R/C
4) Using CH + / - KEY, select 10.TEST PATTERN then press
3) Press ADJ key -> EZ adjust using adj. R/C
4) Using CH + / - KEY, select 10.TEST PATTERN then press
Enter to place in HEAT RUN mode and wait for 30 minutes.
5) Zero calibrate the probe of Color Analyzer, then place it on
the center of LCD module within 10 cm of the surface.
6) Press ADJ key -> 7. White-Balance then press the cursor
to the right (KEY
)
(When
is pressed Full White internal pattern will be
displayed)
7) One of R Gain / G Gain / B Gain should be fixed at 192,
and the rest will be lowered to meet the desired value.
8) Adj. is performed in COOL, MEDIUM, WARM 3 modes of
color temperature
•If internal pattern is not available, use HDMI input. In EZ Adj.
menu 7.White Balance, you can select one of 3 options:
None, Inner, HDMI. Default is inner. By selecting HDMI, you
can adjust using HDMI signal.
menu 7.White Balance, you can select one of 3 options:
None, Inner, HDMI. Default is inner. By selecting HDMI, you
can adjust using HDMI signal.
• Adj. condition and cautionary items
1) Lighting condition in surrounding area
1) Lighting condition in surrounding area
Surrounding lighting should be lower than 10 lux. Try to
isolate adj. area into dark surrounding.
isolate adj. area into dark surrounding.
2) Probe location
- LCD: Color Analyzer (CA-210) probe should be within 10cm
- LCD: Color Analyzer (CA-210) probe should be within 10cm
and perpendicular of the module surface (80°~ 100°)
- In case of LCD, B/L on should be checked using no signal or
Full white Pattern
Full white Pattern
6.1.6 Reference (White Balance adj. coordinate and color
temperature)
6.1.6.1 Adjustment Preparation
• W/B Equipment condition
• W/B Equipment condition
CA210: CH 9, Test signal: Inner pattern (85IRE)
• Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control)
• 15 Pin D-Sub Jack is connected to the AUTO W/B
EQUIPMENT.
• Adjust Process will start by execute I2C Command (Inner
pattern (0xF3, 0xFF)).
∆
Manual White Balance adjust process using Service Remo-
con. After enter Service Mode by pushing “ADJ” key, enter
“White Balance” by pushing “•” key at “ 6. White Balance”.
(CA-210, CH-9)
con. After enter Service Mode by pushing “ADJ” key, enter
“White Balance” by pushing “•” key at “ 6. White Balance”.
(CA-210, CH-9)
*Adjust “R/G/B - GAIN” by pushing “
”, “
” key at “Cool”
*Adjust “R/G/B - GAIN” by pushing “
”, “
” key at “Medium”
*Adjust “R/G/B - GAIN” by pushing “
”, “
” key at “Warm”
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Cool 11,000
K
X=0.276 ± 0.003
Y=0.283 ± 0.003
Y=0.283 ± 0.003
Medium 9,300
K
X=0.285 ± 0.003
Y=0.293 ± 0.003
Y=0.293 ± 0.003
Color
Temperature
Warm 6,500
K
X=0.313 ± 0.003
Y=0.329 ± 0.003
Y=0.329 ± 0.003
<Test Signal>
Inner pattern
(216gray, 85 IRE)
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