DOWNLOAD LG 42LK450 (CHASSIS:LA01U) Service Manual ↓ Size: 5.34 MB | Pages: 72 in PDF or view online for FREE

Model
42LK450 (CHASSIS:LA01U)
Pages
72
Size
5.34 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
42lk450-chassis-la01u.pdf
Date

LG 42LK450 (CHASSIS:LA01U) Service Manual ▷ View online

- 8 -
RED
X
Typ.
0.639
Typ.
47LK450-UB(LGD)
Y
-0.03
0.334
+0.03
GREEN
X
0.290
Y
0.606
BLUE
X
0.146
Y
0.058
WHITE
X
0.279
Y
0.292
4
Contrast ratio
Module
3200
4000
32/37/42LK450(AUO)
1100
1450
42/47LK450-UB(LGD)
1100
1500
37LK450-UB
DCR
90,000:1
100,000:1
32/37/42/47LK450-UB(LGD) 
30,000:1
40,000:1
32/37/42LK450-UB(AUO)
5
Color Temperature
Cool
0.254 
0.269 
0.284 
13000K The W/B Tolerance is ±0.015
0.258 0.273
0.288
for picture quality by DQA
Medium
0.270
0.285
0.300
9300K
0.278
0.293
0.308
Warm
0.298
0.313
0.324
6500K
0.314
0.329
0.344
- 9 -
6. Component Video Input  (Y, C
B/
P
B
, C
R
/P
R
)
No Resolution 
H-freq(kHz) V-freq.(kHz)  Pixel 
clock 
Proposed 
1. 
720*480 
15.73 
60 
13.5135   
SDTV ,DVD 480I 
2. 
720*480 
15.73 
59.94 
13.5   
SDTV ,DVD 480I 
3. 
720*480 
31.50 
60 
27.027   
SDTV 480P
4. 
720*480 
31.47 
59.94 
27.0   
SDTV 480P
5. 
1280*720 
45.00 
60.00 
74.25   
HDTV 720P
6.
1280*720
44.96
59.94
74.176
HDTV 720P
7. 
1920*1080 
33.75 
60.00 
74.25   
HDTV 1080I
8. 
1920*1080 
33.72 
59.94 
74.176   
HDTV 1080I
9. 
1920*1080 
67.500 
60 
148.50   
HDTV 1080P
10.
1920*1080
67.432
59.94
148.352
HDTV 1080P
11.
1920*1080
27.000
24.000
74.25
HDTV 1080P
12.
1920*1080
26.97
23.976
74.176
HDTV 1080P
13.
1920*1080
33.75
30.000
74.25
HDTV 1080P
14.
1920*1080
33.71
29.97
740176
HDTV 1080P
7. RGB Input (PC)
No Resolution 
H-freq(kHz) V-freq.(kHz)  Pixel 
clock 
Proposed 
PC
DDC
1. 
640*350 
31.468 
70.09 
25.17   
EGA 
X  
2. 
720*400 
31.469 
70.08 
28.32   
DOS 
3. 
640*480 
31.469 
59.94 
25.17   
VESA(VGA) 
O
4.
800*600 
37.879 
60.31 
40.00   
VESA(SVGA) 
5. 
1024*768 
48.363 
60.00 
65.00   
VESA(XGA) 
6.
1280*768
47.776
59.870
79.5
CVT(WXGA)
X
7. 
1360*768 
47.712 
60.015 
85.50  
VESA(WXGA)   
X
8.
1280*1024
63.981
60.020
108.00
VESA(SXGA)              O
9.
1920*1080 
66.587 59.934 138.50 
 
WUXGA
O
- 10 -
8. HDMI input (PC/DTV)
No Resolution 
H-freq(kHz) V-freq.(kHz)  Pixel 
clock 
Proposed 
PC
DDC
1. 
640*350 
31.468 
70.09 
25.17   
EGA 
X  
2. 
720*400 
31.469 
70.08 
28.32   
DOS 
3. 
640*480 
31.469 
59.94 
25.17   
VESA(VGA) 
X
4.
800*600 
37.879 
60.31 
40.00   
VESA(SVGA) 
5. 
1024*768 
48.363 
60.00 
65.00   
VESA(XGA) 
6. 
1360*768 
47.712 
60.015 
85.50  
VESA (WXGA)
O  
7. 
1280*1024
63.981
60.020 
108.00 
VESA (SXGA)  
8.
1920*1080 67.500
60.000 
148.50 
 
HDTV 
1080P
O
DTV
720*480 
31.47 
60 
27.027  
SDTV 480P
O
720*480 
31.47 
59.94 
27.00   
SDTV 480P 
O
1280*720 
45.00 
60.00 
74.25   
HDTV 720P 
O
1280*720 
44.96 
59.94 
74.176   
HDTV 720P 
O
1920*1080 
33.75 
60.00 
74.25   
HDTV 1080I 
O
1920*1080 
33.72 
59.94 
74.176   
HDTV 1080I 
O
1920*1080 
67.500 
60 
148.50   
HDTV 1080P 
O
1920*1080 
67.432 
59.939 
148.352   
HDTV 1080P 
O
1920*1080 
27.000 
24.000 
74.25   
HDTV 1080P 
O
10 
1920*1080 
26.97 
23.976 
74.176   
HDTV 1080P 
O
11 
1920*1080 
33.75 
30.000 
74.25   
HDTV 1080P 
O
12 
1920*1080 
33.71
29.97 
74.176   
HDTV 1080P 
O
- 11 -
ADJUSTMENT INSTRUCTION
1. Application range 
This spec. sheet applies to LA01U Chassis applied LED LCD
TV all models manufactured in TV factory. 
2. Specification
2.1   Because this is not a hot chassis, it is not necessary
to use an isolation transformer. However, the use of
isolation transformer will help protect test instrument.  
2.2   Adjustment must be done in the correct order.  
2.3  The adjustment must be performed in the
circumstance of  25±5°C of temperature and 65±10%
of relative humidity   
2.4   The input voltage of the receiver must keep
100~240V~, 50/60Hz.  
2.5 At first Worker must turn on the SET by using Power
Only key.  
2.5    The receiver must be operated for about 5 minutes
prior to the adjustment when module is in the
circumstance of over 15. 
In case of keeping module is in the circumstance of
0°C, it should be placed in the circumstance of above
15°C for 2 hours  
In case of keeping module is in the circumstance of
below -20°C, it should be placed in the circumstance
of above 15°C for  3 hours. 
• Caution 
When a still image is displayed for 20 minutes or longer
(especially where W/B scale is strong.  Digital pattern 13ch
and/or Cross hatch pattern 09ch), there can some
afterimage in the black level area. 
3. Adjustment items
3.1 Board Level Adjustment       
(1) Adjust 480i Comp1(ADC)
(2) EDID/DDC download  
• Remark 
- Above adjustment items can be also performed in Final
Assembly if needed. Adjustment items in both PCBA and
final assembly stages can be checked by using the
INSTART Menu  1.ADJUST CHECK. 
3.2 Final Assembly adjustment  
(1) White Balance adjustment 
(2) RS-232C functionality check 
(3) Factory Option setting per destination 
(4) Shipment mode setting (IN-STOP) 
3.3 Etc       
(1) Ship-out mode  
(2) Service Option Default  
(3) USB Download(S/W Update, Option, Service only)  
(4) ISP Download (Optional) 
4. Board Level Adjustment  
4.1. ADC Adjustment   
4.1.1. Overview 
• ADC adjustment is needed to find the optimum black level
and gain in Analog-to-Digital device and to compensate RGB
deviation. 
4.1.2. Equipment & Condition 
1) Jig (RS-232C protocol) 
• Required equipment : Adjustment R/C 
*Enter Service Mode by pushing “ADJ” key, 
G
” key at “6. ADC
Calibration” 
4.1.3. Adjustment 
4.1.3.1 Adjustment method  
• Using RS-232, adjust items listed in 3.1 in the other
shown in “4.1.3.3” 
4.1.3.2 Adj. protocol  
Ref.) ADC Adj. RS232C Protocol_Ver1.0 
4.1.3.3. Adj. order 
• aa 00 00  [Enter ADC adj. mode] 
• xb 00 40  [Change input source to Component1(1080i)] 
• ad 00 10  [Adjust 480i Comp1] 
• xb 00 60  [Change input source to RGB(1024*768)] 
• ad 00 10  [Adjust 1024*768 RGB] 
• ad 00 90  End adj. 
Ref) ADC adj. RS232C Protocol_Ver1.0 
Protocol
 Command 
Set ACK 
Enter adj. mode 
aa 00 00 
a 00 OK00x 
Source change 
xb 00 40 
xb 00 60  
b 00 OK40x (Adjust 480i /1080p Comp1 ) 
b 00 OK60x (Adjust 1920*1080 RGB) 
Begin adj. 
ad 00 10 
 
Return adj. result 
 
OKx (Case of Success) 
NGx (Case of Fail) 
Read adj. data 
(main) 
ad 00 20  
 
(sub ) 
ad 00 21 
(main) 
000000000000000000000000007c007b006dx 
 
(Sub) 
000000070000000000000000007c00830077x 
Confirm adj. 
ad 00 99 
NG 03 00x (Fai l)
NG 03 01x (Fai l)
NG 03 02x (Fai l)
OK 03 03x (Success) 
End adj. 
aa 00 90 
a 00 OK90x 
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