DOWNLOAD LG 47LC7DF (CHASSIS:LA75A) Service Manual ↓ Size: 16.24 MB | Pages: 43 in PDF or view online for FREE

Model
47LC7DF (CHASSIS:LA75A)
Pages
43
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16.24 MB
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Service Manual
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Device
TV / LCD
File
47lc7df-chassis-la75a.pdf
Date

LG 47LC7DF (CHASSIS:LA75A) Service Manual ▷ View online

4. Factory Adjustment
4.1 Auto Adjust Component 480i/1080p
RGB 1080p
O Summary : Adjustment component 480i/1080i and RGB
1080p is Gain and Black level setting at Analog to
Digital converter, and compensate the RGB
deviation
O Using instrument
- Adjustment remocon, 801GF(802B, 802F, 802R) or
MSPG925FA pattern generator
(It can output 480i/1080i horizontal 100% color bar pattern
signal, and its output level must setting 0.7V±0.1V p-p
correctly)
* You must make it sure its resolution and pattern cause every
instrument can have different setting
O Adjustment method 480i Comp1, Adjust 1080p Comp1/RGB
(Factory adjustment)
1) ADC 480i Component1 adjustment
: Check connection of Component1 
MSPG-925FA => Model: 209, Pattern 65
- Set Component 480i mode and 100% Horizontal Color
Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to "NORMAL"
- After get the signal, wait more a second and enter the
"Ez-Adjust" with press ADJ key of Service remocon.
After then select "3.ADC 480i Comp1" with navigator
button and press "Enter". It is automatically adjustment
- You can see "ADC Component1 Success" message
after Adjustment success
- Error Messages: When its adjustment is not correct,
"ADC Component1 480i Fail" message displayed. If
component is not connection "Component1 Not
Connected", its format is not 480i then "Not Valid
Format", its signal don’t out then "Check Signal Status"
message displayed. These messages will be displayed
just a second.
2) ADC 1080p Component1 / RGB adjustment
: Check connection both of Component1 and RGB
: MSPG-925FA Ë Model: 225, Pattern 65
- Set Component 1080p mode and 100% Horizontal
Color Bar Pattern(HozTV31Bar), then set TV set to
Component1 mode and its screen to "NORMAL" 
- After get the signal, wait more a second and enter the
"Ez-Adjust" with press ADJ key of Service remocon.
After then select "4.ADC 1080p Comp1/RGB" with
navigator button and press "Enter". First, it is
automatically adjustment Component1.
- If adjustment is correctly finished, "ADC Component1
Success" message will be displayed. But adjustment is
not correctly finished, "ADC Component1 1080p Fail"
message will be displayed.
- After adjustment Component1 mode, move to RGB-DTV
mode automatically and RGB adjustment start. After
RGB Adjustment successfully finished, "ADC RGB
1080P Success" message will be displayed.
- If Adjustment doesn’t success, check conditions all of
the adjustment condition and adjustment again. See
"Error Messages" sentence. 
- After adjustment finished, press "ADJ" key and exit from
Adjustment mode.
4.2 EDID (The Extended Display Identification
Data)/DDC (Display Data Channel)
Download.
O Summary 
- It is established in VESA, for communication between PC
and Monitor without order from user for building user
condition. It helps to make easily use realize "Plug and
Play" function. 
- For EDID data write, we use DDC2B protocol. 
O Write HDMI EDID data 
- Using instruments
(1) Jig. (PC Serial to D-Sub connection) for PC, DDC
adjustment.
(2) S/W for DDC recording (EDID data write and read)
(3) D-sub jack
(4) Additional HDMI cable connection Jig.
- Preparing and setting.
(1) Set instruments and Jig. Like pic.5), then turn on PC and
Jig. 
(2) Operate DDC write S/W (EDID write & read)
(3) It will operate in the DOS mode.
- 13 -
(Adjustment pattern : 480i / 1080P 60Hz Pattern)
LCD TV SET
(or Digital Board)
Device configuration diagram for HDMI EDID Data input
O EDID data for LA75A Chassis 
- HDMI1  EDID (DDC (Display Data Channel) Data
- HDMI2  EDID (DDC (Display Data Channel) Data
- HDMI3  EDID (DDC (Display Data Channel) Data
- Analog (RGB) EDID table
* See Working Guide if you want more information about EDID
communication.
- 14 -
0
1
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A
B
C
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0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 02 03 18 F1 47 84 05 03 02 20 22 10 23 15 07 50
10 67 03 0C 00 10 00 B8 2D 01 1D 00 72 51 D0 1E 20
20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C
30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A
40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A
50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18
60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00
70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 27
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 02 03 18 F1 47 84 05 03 02 20 22 10 23 15 07 50
10 67 03 0C 00 30 00 B8 2D 01 1D 00 72 51 D0 1E 20
20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C
30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A
40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A
50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18
60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00
70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 07
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 00 11 01 03 18 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1A 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 F6
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 02 03 04 00 0E 1F 00 80 51 00 1E 30 40 80 37 00
10 C4 8E 21 00 00 1C F1 27 00 A0 51 00 25 30 50 80
20 37 00 C4 8E 21 00 00 1C 26 36 80 A0 70 38 1F 40
30 30 20 25 00 C4 8E 21 00 00 0A 00 00 00 00 00 00
40 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
50 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
60 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
70 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 BC
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 00 FF FF FF FF FF FF 00 1E 6D 01 00 01 01 01 01
10 00 11 01 03 80 73 41 96 0A CF 74 A3 57 4C B0 23
20 09 48 4C AF CF 00 31 40 45 40 61 40 81 80 A9 40
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 C4 8E 21 00 00 1E 02 3A 80 18 71 38 2D 40
50 58 2C 45 00 C4 8E 21 00 00 1E 00 00 00 FD 00 30
60 58 1F 64 11 00 0A 20 20 20 20 20 20 00 00 00 FC
70 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 01 8A
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
0 02 03 18 F1 47 84 05 03 02 20 22 10 23 15 07 50
10 67 03 0C 00 20 00 B8 2D 01 1D 00 72 51 D0 1E 20
20 6E 28 55 00 C4 8E 21 00 00 1E 01 1D 80 18 71 1C
30 16 20 58 2C 25 00 C4 8E 21 00 00 9E 8C 0A D0 8A
40 20 E0 2D 10 10 3E 96 00 C4 8E 21 00 00 18 8C 0A
50 D0 8A 20 E0 2D 10 10 3E 96 00 13 8E 21 00 00 18
60 26 36 80 A0 70 38 1F 40 30 20 25 00 C4 8E 21 00
70 00 1A 00 00 00 00 00 00 00 00 00 00 00 00 00 17
4.3 Adjustment Color Temperature(White
balance)
O Using Instruments
(1)Color Analyzer: CA-210 (CH 9)
- Using LCD color temperature, Color Analyzer (CA-210)
must use CH 9, which Matrix compensated (White,
Red, Green, Blue compensation) with CS-2100. See
the Coordination bellowed one. 
(2) Auto-adjustment Equipment (It needs when Auto-
adjustment – It is availed communicate with RS-232C :
Baud rate: 115200) 
(3) Video Signal Generator MSPG-925F 720p, 216Gray
(Model: 217, Pattern 78)
O Connection Diagram (Auto Adjustment)
(1) Using Inner Pattern 
(2) Using HDMI input 
O White Balance Adjustment 
If you can’t adjust with inner pattern, then you can adjust it
using HDMI pattern. You can select option at "Ez-Adjust
Menu – White Balance" there items "NONE, INNER, HDMI".
It is normally setting at inner basically. If you can’t adjust
using inner pattern you can select HDMI item, and you can
adjust.
In manual Adjust case, if you press ADJ button of service
remocon, and enter "Ez-Adjust Menu – 7. White Balance",
then automatically inner pattern operates. (In case of "Inner"
originally "Inner" will be selected. 
- Connect all cables and equipments like Pic.5)
- Set Baud Rate of RS-232C to 115200. It may set 115200
orignally.
- Connect RS-232C cable to set
- Connect HDMI cable to set
- Select LA75A Chassis at Adjustment equipment, and
adjust.
O RS-232C Command (Commonly apply) 
- "wb 00 00": Start Auto-adjustment of white balance.
- "wb 00 10": Start Gain Adjustment (Inner pattern) 
- "jb 00 c0" : 
- …
- "wb 00 1f": End of Adjustment
* If it needs, offset adjustment (wb 00 20-start, wb 00 2f-
end)
- "wb 00 ff": End of white balance adjustment (inner pattern
disappear)
- 15 -
C A -100+
C O L O R
A N A L Y Z E R
T Y PE ; C A -100+
F u l l W h i t e P at t er n
R S-232C
<Connection Diagram for Adjustment White balance>
RS-232C COMMAND
Meaning
[CMD    ID      DATA]
wb
00
00
White Balance adjustment start.
wb
00
10
Start of adjust gain (Inner white pattern)
wb
00
1f
End of gain adjust
wb
00
20
Start of offset adjust(Inner white pattern)
wb
00
2f
End of offset adjust
wb
00
ff
End of White Balance adjust(Inner pattern disappeared)
Notice) Adjustment Mapping information(Only 37/42LB5DF)
- When Color temperature (White balance) Adjustment
(Automatically)
(1) Press "Power only key" of service remocon and operate
automatically adjustment.
(2) Set BaudRate to 115200.
- You must start "wb 00 00" and finish it "wb 00 ff".
- If it needs, then adjustment "Offset
O White Balance Adjustment (Manual adjustment) 
1) Test Equipment: CA-210
- Using LCD color temperature, Color Analyzer (CA-210)
must use CH 9, which Matrix compensated (White, Red,
Green, Blue compensation) with CS-2100. See the
Coordination bellowed one. 
2) Manual adjustment sequence is like bellowed one.
- Turn to "Ez-Adjust" mode with press ADJ button of
service remocon.
- Select "10.Test Pattern" with CH+/- button and press
enter. Then set will go on Heat-run mode. Over 30
minutes set let on Heat-run mode.
- Let CA-210 to zero calibration and must has gap more
10cm from center of LCD module when adjustment. 
- Press "ADJ" button of service remocon and select
"7.White-Balance" in "Ez-Adjust" then press " G" button
of navigation key.
(When press " G" button then set will go to full white
mode)
- Adjust at three mode (Cool, Medium, Warm)
- If "cool" mode (42LB5DF-UL, 37LB5DF-UL)
Let  B-Gain to 192 and R, G, B-Cut to 64 and then
control R, G gain adjustment High Light adjustment.
- If "Medium" and "Warm" mode (42LB5DF-UL,
37LB5DF-UL)
Let  R-Gain to 192 and R, G, B-Cut to 64 and then
control G, B gain adjustment High Light adjustment.
- All of the three mode (47LB5DF-UL, 47LC7DF-UK)
Let  R-Gain to 192 and R, G, B-Cut to 64 and then
control G, B gain adjustment High Light adjustment.
- With volume button (+/-) you can adjust.
- After all adjustment finished, with Enter (G key) turn to
Ez-Adjust mode. Then with ADJ button, exit from
adjustment mode
=> Attachment : White Balance adjustment coordination and
color temperature.
O Using CS-1000 Equipment. 
- COOL      : T=11000K, ∆uv=0.000, x=0.276 y=0.283 
- MEDIUM  : T=9300K, ∆uv=0.000, x=0.285 y=0.293 
- WARM    : T=6500K, ∆uv=0.000, x=0.313 y=0.329 
O Using CS-210 Equipment. (9 CH)  
4.4 Test of RS-232C control. 
Press In-Start button of Service Remocon then set the
"4.Baud Rate" to 115200. Then check RS-232C control and 
4.5 Selection of Country option. 
- Models: All models which use LA75A Chassis (See the first
page.) 
- Press "In-Start" button of Service Remocon, then enter the
"Option" Menu with "PIP CH-" Button 
- Select one of these three (USA, CANADA, MEXICO)
defends on its market using "Vol. +/-"button
- 16 -
RS-232C COMMAND
CENTER
[CMD ID DATA]
MIN
(DEFAULT)
MAX
Cool Mid
Warm
Cool
Mid
Warm
R Gain
jg
ja
jd
00
184
192
192
192
G Gain
jh
jb
je
00
187
183
159
192
B Gain
ji
jc
jf
00
192
161
95
192
R Cut
64
64
64 
127
G Cut
64
64
64 
127
B Cut
64
64
64 
127
Color temperature Test Equipment
Color Coordination
x
y
COOL
CA-210
0.276±0.002
0.283±0.002
MEDIUM
CA-210
0.285±0.002
0.293±0.002
WARM
CA-210
0.313±0.002
0.329±0.002
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