LG 42LF75 / 42LF76 (CHASSIS:LD75B) Service Manual ▷ View online
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Before AV ADC Calibration, should be executed
the "Tool option 1/2"
the "Tool option 1/2"
5. Select method of Tool option 1 & Tool option2
5.1 Press ADJ Key in the Adjust remocon
5.2 Select "Tool option 1" by using
5.2 Select "Tool option 1" by using
/
(PR+/-) key, and press
(ENTER).
5.3 Select "Maker" by using
/
(PR+/-) key, and change the
module maker and. applied module classification by using
/
(VOL+/-).
5.4 Select "Inch" by using
/
(PR+/-) key, and change the
module according to the inch of model .
5.5 Select "Tool" by using
/
(PR+/-) key, and change the tool
name according to the model .
5.6 After changing the Tool option 1 , push the EXIT Key.
5.7 Input the Tool option 2 as ‘1765’
6. ADC Calibration
=> Caution : - System control RS-232 Host should be "PC" for
adjustment.
- Before AV ADC Calibration, execute the "Module
selection"
6.1 Adjustment of RF / AV / S-VIDEO
√ Required Equipments
• Remote controller for adjustment.
• MSPG-925FS Pattern Generator (Which has Video Signal:
• MSPG-925FS Pattern Generator (Which has Video Signal:
7 Color Bar Pattern shown in Fig. 1).
=> Model: 202 / Pattern: 65
6.1.1 Method of Auto RF/AV/S-VIDEO Color Balance (PAL_BGDHI).
1) Input the Video Signal: 7 Color Bar signal into AV3.
2) Set the PSM to Dynamic mode in the Picture menu.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.1]
3) Press IN-START key on R/C for adjustment.
4) Press the
(Vol.+) key to operate the set, then it becomes
automatically.
5) Auto-RGB OK means the adjustment is completed.
6.2. Adjustment of Component
√Required Equipments
• Remote controller for adjustment.
• MSPG-925FS Pattern Generator. (Which has 720p/50Hz
• MSPG-925FS Pattern Generator. (Which has 720p/50Hz
YPbPr output Pattern shown in Fig. 2)
-> Model : 215 / Pattern : 65
6.2.1 Method of Auto Component Color Balance
1) Input the Component 720p/50Hz 7 Color Bar (MSPG-
925FS model:215, pattern:65) signal into Component.
2) Set the PSM to Dynamic mode in the Picture menu.
[Fig.2]
3) Press the IN-START key on R/C for adjustment.
4) Press the
4) Press the
(Vol.+) key to operate the set , then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
ADC
AV Component
RGB-PC
MSPG925FS
PAL
Model:215 (720P)
INPUT SELECT
AV3
Pattern:65
Model: 3
Model:202(PAL-BGDHI)
*720P/50Hz
(1024*768 60Hz)
7 Color Bar
Pattern: 65
Pattern: 65
*PAL 7 Color Bar
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6.3 Adjustment of RGB
√ Required Equipments
• Remote controller for adjustment
• MSPG-925FS Pattern Generator (Which has XGA
• MSPG-925FS Pattern Generator (Which has XGA
[1024x768] 60Hz 8 color bar 100% pattern shown in Fig. 3 ).
6.3.1 Method of Auto RGB Color Balance
1) Input the PC 1024x768 @ 60Hz 7 Color Bar (MSPG-
925FS model:3, pattern:65) signal into RGB. (using D-sub
to D-sub cable)
to D-sub cable)
2) Set the PSM to Dynamic mode in Picture menu.
3) Press the IN-START key on R/C for adjustment.
3) Press the IN-START key on R/C for adjustment.
[Fig.3]
4) Press the
(Vol.+) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
Before adjusting White-balance , the AV ADC
should be done.
should be done.
7. White Balance
√ Test Equipment
• Color Analyzer (CA-210/CH.9)
=> When you adjust LCD color temperature, on Color
analyzer (CA-210), you should use Channel 9 which is
Matrix compensated (White, Red, Green, Blue revised)
by CS-1000 and adjust in accordance with White
balance adjustment coordinate which is specified on
the next..
Matrix compensated (White, Red, Green, Blue revised)
by CS-1000 and adjust in accordance with White
balance adjustment coordinate which is specified on
the next..
*Color temperature standards according to CSM and Module
* White balance adjustment coordinate and color temperature.
• PC (for communication through RS-232C) => UART Baud
rate : 115200 bps
• Luminance Y AV : upper 200 cd/m
2
(Typ : 350 cd/ß≥) Ë
Applying to Cool mode
* Connecting picture of the measuring instrument (On Automatic
control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push control R/C IN-START => Enter the mode
of White-Balance, the pattern will come out.
auto controller or push control R/C IN-START => Enter the mode
of White-Balance, the pattern will come out.
• Measurement color analyzer : CS1000 or CA210(CH.9)
[Fig.4] connecting picture (On Automatic Control)
* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2) In case of PDP: Measure and adjust after sticking the
Color Analyzer (CA-100+, CA210 ) to the side of the
module.
module.
In case of LCD: Adhere closely the Color Analyzer (
CA210 ) to the module less than 10cm distance, keep it
with the surface of the Module and Color Analyzer’s
Prove vertically.(80~100°).
CA210 ) to the module less than 10cm distance, keep it
with the surface of the Module and Color Analyzer’s
Prove vertically.(80~100°).
3) Aging time
- After aging start, keep the power on (no suspension of
power supply) and heat-run over 15 minutes.
- In case of PDP, keep white pattern using inside pattern.
- In case of LCD, using ‘no signal’ or ‘full white pattern’ or
- In case of LCD, using ‘no signal’ or ‘full white pattern’ or
the others, check the back light on.
7.1 Auto white Balance
1) setup is done.
2) Test Equipment
2) Test Equipment
Color Analyzer ( CA210, CA-100+)
PC (for communication through RS-232C)
RS-232 Host Ë PC
UART Baud rate Ë 115200
Download Ë Cortez
PC (for communication through RS-232C)
RS-232 Host Ë PC
UART Baud rate Ë 115200
Download Ë Cortez
CSM
LCD
Cool
11,000k
Medium
9,300k
Warm
6,500k
Cool
CS-1000
CA-210(CH 9)
x
0.276
0.276±0.002
y
0.283
0.283±0.002
uv
0.000
0.000
Medium
CS-1000
CA-210(CH 9)
x
0.285
0.285±0.002
y
0.293
0.293±0.002
uv
0.000
0.000
Warm
CS-1000
CA-210(CH 9)
x
0.313
0.313±0.002
y
0.329
0.329±0.002
uv
0.003
0.003
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5) When the R/G/B GAIN is 80 on OSD, it is the FULL
DYNAMIC Range of the Module. In order to control white
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be
kept on 80, and other two is controlled lowering from 80.
balance without the saturation of FULL DYNAMIC Range
and DATA, one of R Gain / G Gain / B Gain should be
kept on 80, and other two is controlled lowering from 80.
* Color Temperature: Cool, Medium, Warm
1. When R GAIN is set to 80
1. When R GAIN is set to 80
- Control G GAIN and B GAIN by lowering from 80.
2. When B GAIN is set to 80
- Control R GAIN and G GAIN by lowering from 80.
3. When G GAIN is set to 80
- Control R GAIN and B GAIN by lowering from
192.
One of R Gain / G Gain / B Gain should be kept on
80, and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL
80, and adjust other two lower than 80.
(When R/G/B GAIN are all 80, it is the FULL
DYNAMIC Range of Module)
8. Set Information(Serial No & Model
name)
1) Setting up like bottom figure(After setting white balance,
this is set)
(Setting: Press ADJ Key in the Adjust remocon.
Select "System Control 2" by using
Select "System Control 2" by using
/
(CH+/-) key,
and press
(ENTER)
Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change)
Download value change)
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TROUBLESHOOTING
1. No power
(1) Symptom
1) Doesn't minute discharge at module.
2) Non does not come in into the front LED.
2) Non does not come in into the front LED.
(2) Check follow
Plug in power cord
No
Yes
Is plug in power cord?
Connect cable.
No
Is connect the Line
Filter and Power
Board Cable?
Replace fuse.
No
Is normal the
Fuse(F100) on Power
Board?
Connect Cable.
After remove the cable connect to
Power Board (except the SC100
connection cable), authorizes the
AC voltage marking on manual.
When ST-BY 5V does not operate,
replace Power Board.
No
Is connect the Power
Board and 13P of VSC
Board Cable?
Yes
Yes
Yes
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