LG 42SL90QD-DA (CHASSIS:LT91L) Service Manual ▷ View online
No.
Item
Min
Typ
Max
Remark
1.
Cool
White Balance,X axis
0.267
0.269
0.271
White Balance,Y axis
0.271
0.273
0.275
PSM: Vivid, CSM: Cool,
2.
Medium
White Balance,X axis
0.283
0.285
0.287
White (85IRE)
White Balance,Y axis
0.291
0.293
0.295
Dynamic contrast: off, Dynamic color: off
3.
Warm
White Balance,X axis
0.311
0.313
0.315
White Balance,Y axis
0.327
0.329
0.331
- 8 -
1) Optical characteristics are determined after the unit has been ‘ON’ and stable in a dark environment at 25±2°C
2) Surface luminance is the luminance value at center 1-point across the LCD surface 50cm from the surface with all pixels
2) Surface luminance is the luminance value at center 1-point across the LCD surface 50cm from the surface with all pixels
displaying white.
No.
Item Specification
Min.
Typ.
Max.
Remark
1.
Viewing Angle<CR>10>
Right/Left/Up/Down
178
CR > 10
Luminance (cd/m
2
)
480
600
PSM: Vivid, CSM: Cool,
2.
Luminance
White (100IRE)
Variation -
1.3
3.
Contrast Ratio
CR
1000
1200
All white/ All black
White WX
0.279
WY Typ
0.292
Typ
RED
Xr
- 0.03
0.638
+0.03
PSM: Vivid, CSM: Cool
4.
CIE Color Coordinates
Yr
0.334
White (85IRE)
Green Xg
0.290
Yg
0.606
Blue Xb
0.144
Yb
0.064
- 42” LCD Module (LGD) LC420WUD-SBM4
5.2. Chroma (PSM:Vivid, Color Temperature:Cool)
- except “RGB PC Mode PSM: Standard, Color Temperature:Medium”
** The W/B Tolerance is ±0.002 for Adjustment, but for DQA ±0.015
** The W/B Tolerance is ±0.002 for Adjustment, but for DQA ±0.015
6. SET Optical Feature
6.1. General feature
(Measurement Condition: Full white/ Vivid -> Measure the black luminance after 30 seconds.
6.2. Special feature
Dynamic CR 40000:1 -> Measure the black luminance after 30 seconds.
No.
Item
Luminance(min)
C/R(min)
Remark
AV,COMPONENT,HDMI
AV,COMPONENT,HDMI
1
47 inch
400 cd/m
2
1000
except from the PC mode.
No.
Item Min
Typ
Max
Remark
1
Dynamic CR
90,000
100,000
HDMI 720p Full Black pattern
(Only HDMI mode)
- 9 -
7. Component Video Input (Y, C
B
/P
B
, C
R
/P
R
)
No
Specification
Remark
Resolution
H-freq(kHz)
V-freq(Hz)
1.
720x480 15.73
60.00
SDTV,DVD
480i
2.
720x480 15.63
59.94
SDTV,DVD
480i
3.
720x480
31.47
59.94
480p
4.
720x480
31.50
60.00
480p
5.
720x576
15.625
50.00
SDTV,DVD 625 Line
6.
720x576 31.25
50.00
HDTV
576p
7.
1280x720
45.00
50.00
HDTV 720p
8.
1280x720
44.96
59.94
HDTV 720p
9.
1280x720 45.00
60.00
HDTV
720p
10.
1920x1080 31.25
50.00
HDTV
1080i
11.
1920x1080
33.75
60.00
HDTV 1080i
12.
1920x1080 33.72
59.94
HDTV
1080i
13.
1920x1080 56.250
50
HDTV
1080p
14.
1920x1080
67.43/67.5
59.94/60 HDTV
1080p
No
Specification
Proposed
Remark
Resolution
H-freq(kHz)
V-freq(Hz)
Pixel Clock(MHz)
1.
720*400
31.468
70.08
28.321
For only DOS mode
2.
640*480 31.469
59.94
25.17 VESA
Input 848*480 60Hz, 852*480 60Hz
-> 640*480 60Hz Display
3.
800*600
37.879
60.31
40.00 VESA
4.
1024*768
48.363
60.00
65.00
VESA(XGA)
5.
1280*768 47.78 59.87
79.5
WXGA
6.
1360*768 47.72
59.8
84.75
WXGA
7.
1280*1024 63.595 60.0
108.875
SXGA
FHD
model
8.
1920*1080 66.587
59.93
138.625
WUXGA
FHD
model
8. RGB (PC)
- 10 -
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1.
720*400 31.468
70.08
28.321
HDCP
2.
640*480 31.469
59.94
25.17
VESA HDCP
3. 800*600
37.879
60.31
40.00
VESA
HDCP
4.
1024*768
48.363
60.00 65.00
VESA(XGA)
HDCP
5.
1280*768 47.78
59.87
79.5
WXGA HDCP
6.
1360*768 47.72 59.8 84.75
WXGA HDCP
7.
1280*1024 63.595
60.0 108.875 SXGA
HDCP
8.
1920*1080
67.5
60
148.5
WUXGA
HDCP
9.2. PC Mode
9. HDMI Input (PC/DTV)
9.1. DTV Mode
No
Resolution
H-freq(kHz)
V-freq.(Hz)
Pixel clock(MHz)
Proposed
Remark
1.
720*480
31.469 /31.5
59.94 / 60
27.00/27.03
SDTV 480P
2.
720*576 31.25
50
54
SDTV
576P
3.
1280*720 37.500
50
74.25
HDTV
720P
4.
1280*720
44.96 / 45
59.94 / 60
74.17/ 74.25
HDTV 720P
5.
1920*1080
33.72 / 33.75
59.94 / 60
74.17/ 74.25
HDTV 1080I
6.
1920*1080 28.125 50.00
74.25
HDTV
1080I
7.
1920*1080
26.97 / 27
23.97 / 24
74.17/ 74.25
HDTV 1080P
8.
1920*1080
33.716 / 33.75
29.976 / 30.00
74.25
HDTV 1080P
9.
1920*1080 56.250 50
148.5
HDTV
1080P
10.
1920*1080
67.43 / 67.5
59.94 / 60
148.35/148.50
HDTV 1080P
- 11 -
ADJUSTMENT INSTRUCTION
1. Application Range
This specification sheet is applied to all of the LCD TV with
LT91T chassis.
LT91T chassis.
2. Designation
1) The adjustment is according to the order which is
designated and which must be followed, according to the
plan which can be changed only on agreeing.
plan which can be changed only on agreeing.
2) Power Adjustment: Free Voltage
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard
5) Reserve after operation: Above 5 Minutes (Heat Run)
3) Magnetic Field Condition: Nil.
4) Input signal Unit: Product Specification Standard
5) Reserve after operation: Above 5 Minutes (Heat Run)
Temperature : at 25±5ºC
Relative humidity : 65±10%
Input voltage : 220V, 60Hz
Relative humidity : 65±10%
Input voltage : 220V, 60Hz
6) Adjustment equipments: Color Analyzer (CA-210 or CA-
110), Pattern Generator(MSPG-925L or Equivalent), DDC
Adjustment Jig equipment, SVC remote controller
Adjustment Jig equipment, SVC remote controller
7) Push The “IN STOP KEY” - For memory initialization.
3. Main PCB check process
* APC - After Manual-Insert, executing APC
* Boot file Download
(1) Execute ISP program “Mstar ISP Utility” and then click
“Config” tab.
(2) Set as below, and then click “Auto Detect” and check “OK”
message.
If “Error” is displayed, Check connection between
computer, jig, and set..
computer, jig, and set..
(3) Click “Read” tab, and then load download file (XXXX.bin)
by clicking “Read”.
(4) Click “Connect” tab. If “Can’t” is displayed, check
connection between computer, jig, and set.
(5) Click “Auto” tab and set as below
(6) Click “Run”.
(7) After downloading, check “OK” message.
(6) Click “Run”.
(7) After downloading, check “OK” message.
filexxx.bin
(7)
(5)
(8) ……….OK
(6)
(1)
(3)
(2)
OK
Please Check the Speed :
To use speed between
from 200KHz to 400KHz
(4)
filexxx.bin
Case1 : Software version up
1. After downloading S/W by USB, TV set will reboot
automatically
2. Push “In-stop” key
3. Push “Power on” key
4. Function inspection
5. After function inspection, Push “I n-stop” key.
3. Push “Power on” key
4. Function inspection
5. After function inspection, Push “I n-stop” key.
Case2 : Function check at the assembly line
1. When TV set is entering on the assembly line, Push
“In-stop” key at first.
2. Push “Power on” key for turning it on.
-> If you push “Power on” key, TV set will recover
channel information by itself.
3. After function inspection, Push “In-stop” key.
Click on the first or last page to see other 42SL90QD-DA (CHASSIS:LT91L) service manuals if exist.