LG 26LB75 / 26LB76 (CHASSIS:LD73C) Service Manual ▷ View online
- 9 -
ADJUSTMENT INSTRUCTION
1. Application Range
This spec. sheet is applied to all of the LD73C chassis
manufactured at LG TV Plant all over the world.
manufactured at LG TV Plant all over the world.
2. Specification.
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 to
protect test instruments
However, the use of isolation transformer will help to
protect test instruments
2) Adjustment must be done in the correct sequence.
3) The adjustment must be performed at 25±5°C temperature
3) The adjustment must be performed at 25±5°C temperature
and 65±10% relative humidity if there is no specified
designation.
designation.
4) The input voltage of the receiver must be kept between
100-220V~, 50/60Hz.
5) Before adjustment, execute Heat-Run for 30 minutes at RF
no signal.
3. Channel Memory
1) Press ADJ Key in the Adjust remote control.
2) Select "System Control 3" by using
2) Select "System Control 3" by using
D
/
E
(CH+/-) key press
A
(ENTER).
3) Select “Channel Recover” by using
D
/
E
(CH+/-) key press
G
(VOL+).
4) When Channel Recover is completed, set will be turned off
and LED light go to stand-by mode.
4. EDID
* Caution
1) Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
- Digital EDID : Pin3 exists
2) Never connect HDMI & D-sub Cable at the same time.
3) Use the proper cables below for EDID Writing.
4) Download HDMI1, HDMI2 separately because HDMI1 is
3) Use the proper cables below for EDID Writing.
4) Download HDMI1, HDMI2 separately because HDMI1 is
different from HDMI2.
4.1. EDID Data
4.2. Data
(1) ANALOG (128 bytes)
(2) HDMI 1 (256 bytes)
(3) HDMI 2 (256 bytes)
D-sub to D-sub
DVI-D to HDMI or HDMI ro HDMI
For HDMI EDID
For Analog EDID
Item
Manufacurer ID
Version
Revision
Condition
GSM
Digital : 1
Digital : 3
Data(Hex)
1E6D
01
03
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
a
b
0x01
c
01
03
01
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x02 11
49
4B
A5
6E
00
31
40
45
40
61
40
D1
C0
01
01
0x03 01
01
01
01
01
01
1B
21
50
A0
51
00
1E
30
48
88
0x04 35
00
BC
86
21
00
00
1C
26
36
80
A0
70
38
1F
40
0x05 50
20
85
00
BC
86
21
00
00
18
d
0x06
d
00
00
00
FD
0x07 00
3C
4B
1D
43
0E
00
0A
20
20
20
20
20
20
00
e-1
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
a
b
0x01
c
01
03
80
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x02 11
49
4B
A5
6E
00
31
40
45
40
61
40
D1
C0
01
01
0x03 01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
0x04 45
0
C4
8E
21
00
00
1E
1B
21
50
A0
51
00
1E
30
0x05 48
88
35
0
BC
86
21
00
00
1C
d
0x06
d
00
00
00
FD
0x07 00
32
4B
1C
43
0F
00
0A
20
20
20
20
20
20
01
e-2
0x00 02
03
21
F1
4E
02
11
01
03
12
13
04
14
05
21
1F
0x01 20
22
10
23
09
07
07
83
01
00
00
65
03
0C
00
10
0x02 00
01
1D
0
BC
52
D0
1E
20
B8
28
55
40
C4
8E
21
0x03 00
00
1E
01
1D
00
72
51
D0
1E
20
6E
28
55
00
C4
0x04 8E
21
00
00
1E
01
1D
80
D0
72
1C
16
20
10
2C
25
0x05 80
C4
8E
21
00
00
9E
8C
0A
D0
90
20
40
31
20
0C
0x06 40
55
00
C4
8E
21
00
00
18
4E
1F
00
80
51
00
1E
0x07 30
40
80
37
00
BC
88
21
00
00
18
00
00
00
00
f-1
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
a
b
0x01
c
01
03
80
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x02 11
49
4B
A5
6E
00
31
40
45
40
61
40
D1
C0
01
01
0x03 01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
0x04 45
0
C4
8E
21
00
00
1E
1B
21
50
A0
51
00
1E
30
0x05 48
88
35
0
BC
86
21
00
00
1C
d
0x06
d
00
00
00
FD
0x07 00
32
4B
1C
43
0F
00
0A
20
20
20
20
20
20
01
e-2
0x00 02
03
21
F1
4E
02
11
01
03
12
13
04
14
05
21
1F
0x01 20
22
10
23
09
07
07
83
01
00
00
65
03
0C
00
20
0x02 00
01
1D
0
BC
52
D0
1E
20
B8
28
55
40
C4
8E
21
0x03 00
00
1E
01
1D
00
72
51
D0
1E
20
6E
28
55
00
C4
0x04 8E
21
00
00
1E
01
1D
80
D0
72
1C
16
20
10
2C
25
0x05 80
C4
8E
21
00
00
9E
8C
0A
D0
90
20
40
31
20
0C
0x06 40
55
00
C4
8E
21
00
00
18
4E
1F
00
80
51
00
1E
0x07 30
40
80
37
00
BC
88
21
00
00
18
00
00
00
00
f-1
- 10 -
(4) HDMI 3 (256 bytes)
=> Detail EDID Options are below (a, b, c, d, e-1, e-2, f-1)
(a) Product ID
(b) Serial No: Controlled on production line.
(c) Month, Year: Controlled on production line:
(b) Serial No: Controlled on production line.
(c) Month, Year: Controlled on production line:
ex) Monthly : ‘09’ -> ‘09’
Year : ‘2006’ -> ‘10’
(d) Model Name(Hex)
(e-1, e-2, f-1, f-2) Checksum: Changeable by total EDID data.
(e-1, e-2, f-1, f-2) Checksum: Changeable by total EDID data.
* Before AV ADC Calibration, should be executed the “Tool option 1”
5. Select method of Tool option 1
1) Press ADJ Key in the Adjust remote control.
2) Select “Tool option 1” by using
2) Select “Tool option 1” by using
D
/
E
(CH+/-) key, and press
A
(ENTER).
3) Select “Maker” by using
D
/
E
(CH+/-) key, and change the
module maker and. applied module classification by using
F
/
G
(VOL+/-).
4) Select “Inch” by using
D
/
E
(CH+/-) key, and change the
module according to the inch of model.
5) Select “Tool” by using
D
/
E
(CH+/-) key, and change the
tool name according to the model.
- Maker : LPL
- Inch : 32”
- Tool : LB75
- Maker : LPL
- Inch : 32”
- Tool : LB75
6) After changing the Tool option 1, push the EXIT Key.
6. ADC Calibration
<Caution>
- System control RS-232 Host should be “PC” for adjustment.
- Before AV ADC Calibration, execute the “Module selection”.
- Before AV ADC Calibration, execute the “Module selection”.
6.1. Adjustment of RF/AV/S-VIDEO
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has Video
- MSPG-925FS Pattern Generator (Which has Video
Signal: 7 Color Bar Pattern shown in Fig. 1)
=> Model: 202 / Pattern: 65
=> Model: 202 / Pattern: 65
(2) Method of Auto RF/AV/S-VIDEO Color Balance.
1) Input the Video Signal: 7 Color Bar signal into AV3.
2) Set the PSM to Dynamic mode in the Picture menu.
3) Press IN-START key on R/C for adjustment.
4) Press the
2) Set the PSM to Dynamic mode in the Picture menu.
3) Press IN-START key on R/C for adjustment.
4) Press the
G
(Vol.+) key to operate the set, then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
6.2 Adjustment of Component.
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925FS Pattern Generator (Which has 720p/60Hz
- MSPG-925FS Pattern Generator (Which has 720p/60Hz
YPbPr output Pattern shown in Fig. 1 )
=> Model:215/Pattern: 65
=> Model:215/Pattern: 65
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
a
b
0x01
c
01
03
80
46
27
78
EA
D9
B0
A3
57
49
9C
25
0x02 11
49
4B
A5
6E
00
31
40
45
40
61
40
D1
C0
01
01
0x03 01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
0x04 45
0
C4
8E
21
00
00
1E
1B
21
50
A0
51
00
1E
30
0x05 48
88
35
0
BC
86
21
00
00
1C
d
0x06
d
00
00
00
FD
0x07 00
32
4B
1C
43
0F
00
0A
20
20
20
20
20
20
01
e-2
0x00 02
03
21
F1
4E
02
11
01
03
12
13
04
14
05
21
1F
0x01 20
22
10
23
09
07
07
83
01
00
00
65
03
0C
00
30
0x02 00
01
1D
0
BC
52
D0
1E
20
B8
28
55
40
C4
8E
21
0x03 00
00
1E
01
1D
00
72
51
D0
1E
20
6E
28
55
00
C4
0x04 8E
21
00
00
1E
01
1D
80
D0
72
1C
16
20
10
2C
25
0x05 80
C4
8E
21
00
00
9E
8C
0A
D0
90
20
40
31
20
0C
0x06 40
55
00
C4
8E
21
00
00
18
4E
1F
00
80
51
00
1E
0x07 30
40
80
37
00
BC
88
21
00
00
18
00
00
00
00
f-1
ADC
RF/AV/S-VIDEO
Component
RGB-PC
MSPG925FS PALJ
Model:215 (720P) Model: 3
INPUT SELECT AV3
Pattern:65
(1024*768 60Hz)
Model: 202 (PAL-BGDHI) 720P/50Hz
Pattern: 65
Pattern: 65
7 Color Bar
PAL 7 Color Bar
<Fig. 1>
(2) 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
3) Press the IN-START key on R/C for adjustment.
4) Press the
3) Press the IN-START key on R/C for adjustment.
4) Press the
G
(Vol.+) key to operate the set , then it
becomes automatically.
5) Auto-RGB OK means the adjustment is completed.
6.3 Adjustment of RGB
(1) Required Equipments
- Remote controller for adjustment
- MSPG-925F Pattern Generator
- MSPG-925F Pattern Generator
(Which has XGA [1024*768] 60Hz 8 Color Bar pattern
shown in Fig. 1)
shown in Fig. 1)
(2) Method of Auto RGB Color Balance
1) Input the PC 1024x768@60Hz 100% Color Bar pattern
(MSPG-925F model:37, pattern:33) into RGB.
(Using D-sub to D-sub cable)
(Using D-sub 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
4) Press the
3) Press the IN-START key on R/C for adjustment
4) Press the
G
(Vol.+) key operate To set , then it becomes
automatically.
5) Auto-RGB OK means adjustment is completed.
* Before White-balance, the AV ADC should be done.
7. White Balance
(1) Test Equipment
1) 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.
(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.
* Color temperature standards according to CSM and Module
Cool : 11,000k
Medium : 9,300k
Warm : 6,500k
Medium : 9,300k
Warm : 6,500k
* White balance adjustment coordinate and color
temperature
2) PC (for communication through RS-232C)
-> UART Baud rate : 115200 bps
3) Luminance Y AV : upper 200 cd/m
2
≥ (Typ : 350 cd/m
2
)
-> Applying to Cool mode
(2) 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.
to auto controller or push control R/C IN-START -> Enter
the mode of White-Balance, the pattern will come out.
1) Measurement colo analyzer : CS1000 or CA210(CH. 9)
2) Auto adjustment Map (RS-232C)
- 11 -
Cool
CS-1000
CA-210(CH 9)
x
0.276
0.276±0.002
y
0.283
0.283±0.002
Δuv
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
Δuv
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
Δuv
0.003
0.003
<Fig. 2> Connecting picture (On Automatic Control)
Type
LD73A
Baud Rate
Data bit
Stop bit
Parity
115200
8
1
None
Protocol
Index
Cmd 1 Cmd 2 Data Min Value
Max Value
Setting
R-Gain_Normal
j
a
00(00)
128(80)
G-Gain_Normal
j
b
00(00)
128(80)
B-Gain_Normal
j
c
00(00)
128(80)
R-Gain_Warm
j
d
00(00)
128(80)
G-Gain_Warm
j
e
00(00)
128(80)
B-Gain_Warm
j
f
00(00)
128(80)
R-Gain_Cool
j
g
00(00)
128(80)
G-Gain_Cool
j
h
00(00)
128(80)
B-Gain_Cool
j
i
00(00)
128(80)
R-Offset_Normal
l
j
00(00)
128(80)
G-Offset_Normal
l
k
00(00)
128(80)
B-Offset_Normal
l
l
00(00)
128(80)
R-Offset_Warm
l
m
00(00)
128(80)
G-Offset_Warm
l
n
00(00)
128(80)
B-Offset_Warm
l
o
00(00)
128(80)
R-Offset_Cool
l
p
00(00)
128(80)
G-Offset_Cool
l
q
00(00)
128(80)
B-Offset_Cool
l
r
00(00)
128(80)
w
b
00
W/B adjustment Start
w
b
10
w
b
ff
W/B adjustment end
(3) Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10Lux).
2) Adhere closely the Color Analyzer (CA-210) to the module
less than 10cm distance, keep it with the surface of the
Module and Color Analyzer’s Prove vertically. (80~100°).
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.
- Using ‘no signal’ or ‘full white pattern’ or the others,
check the back light on.
7.1. Auto white Balance
(Set:RS-232C, Host:PC, Baud Rate:115200bps, Download:Cortez)
Inside pattern is used when white balance is controlled.
Connect as below figure and click the start button on W/B
execution program. W/B is automatically processing Cool ->
Medium -> Warm in order.
When W/B is completed, you can see ‘OK’ on PC monitor.
Connect as below figure and click the start button on W/B
execution program. W/B is automatically processing Cool ->
Medium -> Warm in order.
When W/B is completed, you can see ‘OK’ on PC monitor.
7.2 Manual white Balance
- One of R Gain / G Gain / B Gain should be kept on 80, and
others are controlled lowering from 80
(1) Press ‘power on’ of the control R/C, set heat run to white
by pressing
G
, and heat run over 15 minutes. (Set : RS-233
Host : PC, Baud Rate : 115200bps, Download : Cortez)
(2) Zero Calibrate CA-210, and when controlling, stick the
sensor to the center of LCD module surface.
(3) Double click In-start key on Controlling R/C and get in
‘white balance’.
(4) Set test-pattern on and display inside pattern. Control is
carried out on three color temperature, COOL, MEDIUM,
WARM. (Control is carried out three times,)
WARM. (Control is carried out three times,)
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
- 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 80.
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 DYNAMIC
Range of Module)
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)
1) Press ADJ Key in the Adjust remocon.
2) Select “System Control 2” by using
1) Press ADJ Key in the Adjust remocon.
2) Select “System Control 2” by using
D
/
E
(CH+/-) key, and
press
A
(ENTER).
3) Using Adjust remocon, RS-232 Host & Baud Rate &
Download value change (RS-232 Host:Gprobe, Baud
Rate:115200bps, Download:Cortez)
Rate:115200bps, Download:Cortez)
(2) Bar-code scanning
1) Push the menu button in DTV mode.
Select the STATION -> Diagnostics -> To set
2) Check the Serial Number.
- 12 -
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