LG 42LH90QD (CHASSIS:LT91C) Service Manual ▷ View online
* USB DOWNLOAD(*.epk file download)
(1) Put the USB Stick to the USB socket.
(2) Automatically detecting update file in USB Stick.
(2) Automatically detecting update file in USB Stick.
- If your downloaded program version in USB Stick is Low,
it didn’t work. But your downloaded version is High, USB
data is automatically detecting
data is automatically detecting
(3) Show the message “Copying files from memory”
(4) Updating is staring.
(5) After updating is complete, The TV will restart automatically.
(6) If TV turns on, check your updated version and Tool
(6) If TV turns on, check your updated version and Tool
option. (refer to the next page about tool option)
* If downloading version is higher than your TV have, TV
can lost all channel data. In this case, you have to
channel recover. If all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
channel recover. If all channel data is cleared, you didn’t
have a DTV/ATV test on production line.
* After downloading, have to adjust Tool Option again.
1. Push "IN-START" key in service remote controller.
2. Select "Tool Option 1" and Push “OK” button.
3. Punch in the number. (Each model has their number.)
2. Select "Tool Option 1" and Push “OK” button.
3. Punch in the number. (Each model has their number.)
4. Completed selecting Tool option.
3.1. ADC Process
• Input signal : Component
• Signal equipment displays
• Signal equipment displays
Adjustment pattern
- Component 480I
MODEL: 209 in Pattern Generator(480i Mode)
PATTERN : 65 in Pattern Generator(MSPG-925 SERIES)
PATTERN : 65 in Pattern Generator(MSPG-925 SERIES)
• Input Signal : RGB (You don’t need to connect RGB Cable).
Because We use TV internal pattern.
G
” key at “5. ADC
Calibration”
* Caution: Using ‘power on’ button of the Adj. R/C, power on TV.
* ADC Calibration Protocol (RS232)
* Adjustment can be done using only external ADC
* Required equipment : Adjustment R/C.
* Down Load data of picture
* Required equipment : Adjustment R/C.
* Down Load data of picture
This process must do in using the LED model
- Push the button “Power Only “ key in Adjust remote control
- Push the button “ Exit” key in Adjust remote control
- Push the button “ Exit” key in Adjust remote control
3.2. Function Check
(1) Check display and sound
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In
* Display and Sound check is executed by remote control.
1) TV
2) AV (CVBS)
3) COMPONENT (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In
* Display and Sound check is executed by remote control.
- 13 -
Model
Tool option1 Tool option2 Tool option3 Tool option4
42LH90QD
25411
3144
55462
20736
47LH90QD
33603
3144
55462
20736
55LH90QD
45891
3144
55462
20736
i
TV Software Upgrade
Upgrading...
Do not plug off!
63%
i
TV Software Upgrade
Upgrading COMPLETED
The TV will restart after seconds.
100%
EZ ADJUT
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test Pattern
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test Pattern
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
ADC Calibration
ADC Comp 480i
ADC Comp 1080p
ADC RGB
NG
NG
NG
Reset
Start
i
TV Software Upgrade
Copying files from memory
Do not remove the memory card from the pc
Do not plug off!
NO
Item
CMD1 CMD2
Data0
Data 1
1
Main total mode
A
A
0
0
0
0
2 Change to Component X
B
0
0
4
0
3
Adjust Component
A
D
0
0
1
0
4
Change to RGB
X
B
0
0
6
0
5
Adjust RGB
A
D
0
0
1
0
4. Total Assembly line process
4.1. Adjustment Preparation
· W/B Equipment condition
CA210 : CH 14(LED), Test signal : Inner pattern (85IRE)
· Above 5 minutes H/run in the inner pattern. (“power on” key
of adjust remote control)
4.1.1 Connecting picture of the measuring instrument
(On Automatic control)
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C POWER ON -> Enter
the mode of White-Balance, the pattern will come out
Inside PATTERN is used when W/B is controlled. Connect to
auto controller or push Adjustment R/C POWER ON -> Enter
the mode of White-Balance, the pattern will come out
4.1.2 Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10ux).
2) 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°).
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 15minutes.
- Using ‘no signal’ or ‘full white pattern’ or the others, check
the back light on.
4.1.3 Auto adjustment Map (only RS-232C)
RS-232C COMMAND
[CMD format]
[CMD format]
- LEN: Number of Data Byte to be send
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- A: Acknowledge
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
[ CMD ID DATA ]
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
Wb 00 00 White Balance Start
Wb 00 ff White Balance End
In the SET applied LED module, as to physical characteristics of
LED Module,
the sets takes a 120 minutes by aging time to stabilize a color
coordinates. So White Balance Control equipments get the SET
Aging Time from SET and then going to control the W/B by
revise color coordinates in the each time.
the sets takes a 120 minutes by aging time to stabilize a color
coordinates. So White Balance Control equipments get the SET
Aging Time from SET and then going to control the W/B by
revise color coordinates in the each time.
- The Time Table of color coordinates by SET Aging Time
**Caution **
Color Temperature : COOL, Medium, Warm.
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.
(when R/G/B Gain are all C0, it is the FULL Dynamic Range of
Module)
One of R Gain/G Gain/ B Gain should be kept on 0xC0, and
adjust other two lower than C0.
(when R/G/B Gain are all C0, it is the FULL Dynamic Range of
Module)
- 14 -
Cool
11,000k
ºK
X=0.276(±0.002)
Y=0.283(±0.002)
<Test Signal>
Medium 9,300k
ºK
X=0.285(±0.002)
Inner pattern
Y=0.293(±0.002)
(216gray,85IRE)
Warm
6,500k
ºK
X=0.313(±0.002)
Y=0.329(±0.002)
Full White Pattern
COLOR
ANALYZER
TYPE: CA-210
ANALYZER
TYPE: CA-210
RS-232C Communication
CA-210
START 6E A 50 A LEN A 03 A CMD A 00 A VAL A CS A STOP
RS-232C COMMAND MIN
CENTER
MAX
[CMD ID DATA]
(DEFAULT)
Cool
Mid
Warm
Cool
Mid
Warm
R Gain
jg
Ja
jd
00
172
192
192
255
G Gain
jh
Jb
je
00
172
192
192
255
B Gain
ji
Jc
jf
00
192
192
172
255
R Cut
64
64
64
128
G Cut
64
64
64
128
B Cut
64
64
64
128
Cool
Medium
Warm
H/R Time(Min)
axisX axisY axisX axisY axisX axisY
276
283
285
293
313
329
1
0-4
284
301
293
311
313
329
2
5-9
282
296
291
307
312
328
3
10-14
281
291
290
303
310
326
4
15-19
280
288
289
301
308
324
5
20-24
279
286
288
299
307
322
6
25-29
278
285
287
297
306
321
7
30-39
277
284
286
295
305
320
8
40 -
276
283
285
293
304
318
4.2. Manual W/B process using adj. R/C
Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off
Dynamic color : off
OPC : Off
Energy saving mode : Off
• After enter Service Mode by pushing “ADJ” key,
• Enter White Balance by pushing “
• Enter White Balance by pushing “
G
”
• In the SET applied LED module, as to physical
characteristics of LED Module, the sets takes a 120 minutes
by aging time to stabilize a color coordinates. So White
Balance Control equipments get the SET Aging Time from
SET and then going to control the W/B by revise color
coordinates in the each time
by aging time to stabilize a color coordinates. So White
Balance Control equipments get the SET Aging Time from
SET and then going to control the W/B by revise color
coordinates in the each time
- The Time Table of color coordinates by SET Aging Time
* After done all adjustments, Press “In-start” button and
compare Tool option and Area option
value with its BOM, if it is correctly same then unplug the AC
cable.
If it is not same, then correct it same with BOM and unplug
AC cable.
For correct it to the model’s module from factory JIG model.
cable.
If it is not same, then correct it same with BOM and unplug
AC cable.
For correct it to the model’s module from factory JIG model.
* Push The “IN STOP KEY” after completing the function
inspection.
4.3 DDC EDID Write (RGB 128Byte )
· Connect D-sub Signal Cable to D-Sub Jack.
· Write EDID DATA to EEPROM (24C02) by using DDC2B
· Write EDID DATA to EEPROM (24C02) by using DDC2B
protocol.
· Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert
Process in advance.
4.4 DDC EDID Write (HDMI 256Byte)
· Connect HDMI Signal Cable to HDMI Jack.
· Write EDID DATA to EEPROM(24C02) by using DDC2B
· Write EDID DATA to EEPROM(24C02) by using DDC2B
protocol.
· Check whether written EDID data is correct or not.
* For SVC main Ass’y, EDID have to be downloaded to Insert
Process in advance.
4.5 EDID DATA
1) All Data : HEXA Value
2) Changeable Data :
2) Changeable Data :
*: Serial No : Controlled / Data:01
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum
**: Month : Controlled / Data:00
***:Year : Controlled
****:Check sum
- Auto Download
· After enter Service Mode by pushing “ADJ” key,
· Enter EDID D/L mode.
· Enter “START” by pushing “OK” key.
· Enter EDID D/L mode.
· Enter “START” by pushing “OK” key.
* Edid data and Model option download (RS232)
- 15 -
Cool
Medium
Warm
H/R Time(Min)
axisX axisY axisX axisY axisX axisY
276
283
285
293
313
329
1
0-4
284
301
293
311
304
318
2
5-9
282
296
291
307
305
320
3
10-14
281
291
290
303
306
321
4
15-19
280
288
289
301
307
322
5
20-24
279
286
288
299
308
324
6
25-29
278
285
287
297
310
326
7
30-39
277
284
286
295
312
328
8
40 -
276
283
285
293
313
329
EZ ADJUT
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test Pattern
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test Pattern
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
10. V-Com
11. P-Gamma
EDID D/L
HDMI1
HDMI2
HDMI3
RGB
NG
NG
NG
NG
Reset
Start
EDID D/L
HDMI1
HDMI2
HDMI3
RGB
OK
OK
OK
OK
Reset
Start
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Country Group
5. ADC Calibration
6. White Balance
7. Test Pattern
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
8. EDID D/L
9. Sub B/C
10. V-Com
11. P-Gamma
White Balance
Color Temp.
R-Gain
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern.
Reset
Cool
172
172
192
64
64
64
ON
To set
Item
CMD1 CMD2 Data0
Download
A
A
0
0
When transfer the ‘Mode In’,
‘Mode In’
Carry the command.
Download
A
E
00 10 Automatically Download
(The use of a internal pattern)
- Manual Download
* Caution
1) Use the proper signal cable for EDID Download
- Analog EDID : Pin3 exists
- Digital EDID : Pin3 exists
- Digital EDID : Pin3 exists
2) Nerver connect HDMI & D-sub Cable at the same time.
3) Use the proper cables below for EDID Writing.
4) Download HDMI1, HDMI2 separately because each data is
3) Use the proper cables below for EDID Writing.
4) Download HDMI1, HDMI2 separately because each data is
different.
(1) Analog Data 128Byte
* Detail EDID Options are below
Product ID
Month, Year: Controlled on production line:
ex) Monthly : ‘09’ -> ‘09’
Year : ‘2006’ -> ‘10’
Model Name(Hex):
Checksum: Changeable by total EDID data.
(2) Digital Data (HDMI-1/2/3) 256Byte
* Detail EDID Options are below
Product ID
Month, Year: Controlled on production line:
ex) Monthly : ‘09’ -> ‘09’
Year : ‘2006’ -> ‘10’
Model Name(Hex):
Checksum: Changeable by total EDID data.
Vendor Specific
Vendor Specific
- FHD model except
e
d
c
b
a
d
c
b
a
- 16 -
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
00
00
FF
FF
FF
FF
FF
FF
00
1E
6D
01
01
01
01
10
01
03
68
73
41
78
0A
CF
74
A3
57
4C
B0
23
20
09
48
4C
A1
08
00
81
80
61
40
45
40
31
40
01
01
30
01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
40
45
00
7E
8A
42
00
00
1E
01
1D
00
72
51
D0
1E
20
50
6E
28
55
00
7E
8A
42
00
00
1E
00
00
00
FD
00
3A
60
3E
1E
53
10
00
0A
20
20
20
20
20
20
70
00
d
c
c
b
a
MODEL
MODEL NAME(HEX)
all
00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
MODEL NAME
HEX
EDID Table
DDC Function
FHD Model
0001
01 00
Analog/Digital
0
1
2
3
4
5
6
7
8
9
A
B
C
D
E
F
00
00
FF
FF
FF
FF
FF
FF
00
1E
6D
01
01
01
01
10
01
03
80
73
41
78
0A
CF
74
A3
57
4C
B0
23
20
09
48
4C
A1
08
00
81
80
61
40
45
40
31
40
01
01
30
01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
40
45
00
7E
8A
42
00
00
1E
01
1D
00
72
51
D0
1E
20
50
6E
28
55
00
7E
8A
42
00
00
1E
00
00
00
FD
00
3A
60
3E
1E
53
10
00
0A
20
20
20
20
20
20
70
01
80
02
03
26
F1
4E
10
1F
84
13
05
14
03
02
12
20
21
90
22
15
01
26
15
07
50
09
57
07
A0
E3
05
03
01
01
1D
80
18
71
1C
16
20
58
2C
B0
25
00
7E
8A
42
00
00
9E
01
1D
00
80
51
D0
0C
20
C0
40
80
35
00
7E
8A
42
00
00
1E
02
3A
80
18
71
38
D0
2D
40
58
2C
45
00
7E
8A
42
00
00
1E
66
21
50
B0
E0
51
00
1B
30
40
70
36
00
7E
8A
42
00
00
1E
00
00
F0
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
d
e
e
d
c
c
b
a
INPUT
MODEL NAME(HEX)
HDMI1
67030C001000B82D
HDMI2
67030C002000B82D
HDMI3
67030C003000B82D
HDMI4
67030C004000B82D
D-sub to D-sub
DVI-D to HDMI or HDMI to HDMI
For HDMI EDID
For Analog EDID
Item
Manufacturer ID
Version
Revision
Condition
GSM
Digital : 1
Digital : 3
Data(Hex)
1E6D
01
03
MODEL NAME
HEX
EDID Table
DDC Function
FHD Model
0001
01 00
Analog/Digital
MODEL
MODEL NAME(HEX)
all
00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
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