DOWNLOAD LG 37LK450 / 37LK450A / 37LK450N / 37LK450U / 37LK451 (CHASSIS:LD01M) Service Manual ↓ Size: 5.17 MB | Pages: 41 in PDF or view online for FREE

Model
37LK450 37LK450A 37LK450N 37LK450U 37LK451 (CHASSIS:LD01M)
Pages
41
Size
5.17 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37lk450-37lk450a-37lk450n-37lk450u-37lk451-chassis.pdf
Date

LG 37LK450 / 37LK450A / 37LK450N / 37LK450U / 37LK451 (CHASSIS:LD01M) Service Manual ▷ View online

* After downloading, have to adjust Tool Option again.
(1) Push “IN-START” key in service manual control.
(2) Select ‘Tool Option 1’ and push ‘OK’ key.
(3) Punch in the number. (Each models has their number.)
(4) Correction Tool option is completed. 
3.1. ADC Process
G
’ key at “7. ADC
Calibration”.
<Caution> Using ‘P-ONLY’ key of the Adjustment remote
control, power on TV.
* ADC Calibration Protocol (RS232)
Adjust Sequence
• aa 00 00 [Enter Adjust Mode]
• xb 00 40 [Component1 Input (480i)]
• ad 00 10 [Adjust 480i Comp1]
• xb 00 60 [RGB Input (1024*768)]
• ad 00 10 [Adjust 1024*768 RGB]
• aa 00 90 End Adjust mode
* Required equipment : Adjustment Remote control
3.2. EDID Download
1) After Enter Service Mode by pushing ‘ADJ’ key,
2) Enter EDID D/L mode.
3) Enter ‘START’ by pushing ‘OK’ key.
<Caution> Never connect HDMI & D-sub cable when EDID
download
3.3. EDID data
(1) FHD RGB EDID data
(2) FHD HDMI EDID data
(3) Detail EDID Options are below
a. Product ID
b. Serial No: Controlled on production line.
c. Month, Year: 
Week : ‘01’ -> ‘01’
Year : ‘2011’ -> ‘15’ fix
d. Model Name(Hex): 
e. Checksum: Changeable by total EDID data.
f. Vendor Specific(HDMI)
- 10 -
ADC Calibration
ADC Comp 480i
NG
ADC Comp 1080p
NG
ADC RGB
NG
Start
Reset
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Country Group
6. Area Option
7. ADC Calibration
8. White Balance
9. 10 Point WB
10. Test Pattern
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Setting
No
Item CMD1 CMD2 Data0
Enter Adjust
Adjust
A
A
0
0
When transfer the ‘Mode In’,
Mode
‘Mode In’
Carry the command.
ADC adjust ADC Adjust
D
1
0
Automatically adjustment
(The use of a internal pattern)
HDMI1
OK
HDMI2
OK
HDMI3
OK
RGB
OK
Start
Reset
EDID D/L
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Country Group
6. Area Option
7. ADC Calibration
8. White Balance
9. 10 Point WB
10. Test Pattern
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Setting
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
a
b
10
c
01
03
80
10
09
78
0A
EE
91
A3
54
4C
99
26
20
0F
50
54
A1
08
00
71
4F
81
80
01
01
01
01
01
01
30
01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
40
45
00
A0
5A
00
00
00
1E
1B
21
50
A0
51
00
1E
30
50
48
88
35
00
A0
5A
00
00
00
1C
00
00
00
FD
00
3A
60
3E
1E
53
10
00
0A
20
20
20
20
20
20
d
70
d
01
e
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
f
A0
f
E3
05
03
01
01
1D
80
18
71
1C
16
20
58
2C
B0
25
00
A0
5A
00
00
00
9E
01
1D
00
72
51
D0
1E
20
C0
6E
28
55
00
A0
5A
00
00
00
1E
02
3A
80
18
71
38
D0
2D
40
58
2C
45
00
A0
5A
00
00
00
1E
01
1D
00
BC
E0
52
D0
1E
20
B8
28
55
40
A0
5A
00
00
00
1E
00
00
F0
00
00
00
00
00
00
00
00
00
00
00
00
00
00
00
e
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
a
b
10
c
01
03
68
10
09
78
0A
EE
91
A3
54
4C
99
26
20
0F
50
54
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
A0
5A
00
00
00
1E
66
21
50
B0
51
00
1B
30
50
40
70
36
00
A0
5A
00
00
00
1E
00
00
00
FD
00
3A
60
3E
1E
53
10
00
0A
20
20
20
20
20
20
d
70
d
00
e
Model Name
HEX
EDID Table
DDC Function
HD/FHD Model
0001
01 00
Analog/Digital
MODEL
MODEL NAME(HEX)
LG TV
00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20
EDID C/S data
FHD
HD
HDMI
RGB
HDMI
RGB
Check sum Block 0
E2
ED
B4
CD
(Hex)
99(HDMI1)
75(HDMI1)
Block 1 89(HDMI2)
65(HDMI2)
79(HDMI3)
55(HDMI3)
INPUT
MODEL NAME(HEX)
HDMI1 67030C001000B82D
HDMI2 67030C002000B82D
HDMI3
67030C003000B82D
3.4. Function Check
(1) Check display and sound
- Check Input and Signal items. (cf. work instructions)
1) TV
2) AV
3) COMPONENT1/2 (480i)
4) RGB (PC : 1024 x 768 @ 60hz)
5) HDMI
6) PC Audio In 
* Display and Sound check is executed by remote control.
<Caution> Not to push the INSTOP key after completion if the
function inspection.
4. Total Assembly line process
4.1. Adjustment Preparation
· W/B Equipment condition
CA210
- CCFL/EEFL -> CH 9, Test signal : Inner pattern(80 IRE)
- LED -> CH 14, Test signal : Inner pattern(80 IRE)
· Above 5 minutes H/run in the inner pattern. (“power on” key
of adjustment remote control)
· Edge LED W/B Table in process of aging time(Only LGD
Module)
CA210 : CH14, Test signal : Inner patter (80 IRE)
* 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
* Auto-control interface and directions
1) Adjust in the place where the influx of light like floodlight
around is blocked. (illumination is less than 10 lux).
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.(80º ~ 100º).
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.
• Auto adjustment Map(RS-232C)
RS-232C COMMAND
[CMD
ID DATA]
Wb
00
00
White Balance Start
Wb
00
ff
White Balance End
** 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)
* Manual W/B process using adjusts Remote control.
• After enter Service Mode by pushing “ADJ” key,
• Enter White Balance by pushing “
G
” key at “8. White
Balance”.
* After done all adjustments, Press “In-start” key 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.
* Push the “IN STOP” key after completing the function
inspection. And Mechanical Power Switch must be set “ON”.
- 11 -
Cool 13,000
K
X=0.269(±0.002)
Y=0.273(±0.002)
<Test Signal>
Medium
9,300
K
X=0.285(±0.002)
Inner pattern
Y=0.293(±0.002)
(204 gray,80 IRE)
Warm
6,500
K
X=0.313(±0.002)
Y=0.329(±0.002)
Aging Time
Cool
Medium
Warm
GP2R
(Min.)
X
Y
X
Y
X
Y
269
273
285
293
313
329
1
0-2
279
288
295
308
319
338
2
3-5
278
286
294
306
318
336
3
6-9
277
285
293
305
317
335
4
10-19
276
283
292
303
316
333
5
20-35
274
280
290
300
314
330
6
36-49
272
277
288
297
312
327
7
50-79
271
275
287
295
311
325
8
80-149
270
274
286
294
310
324
9
Over 150
269
273
285
293
309
323
Full White Pattern
COLOR
ANALYZER
TYPE: CA-210
RS-232C Communication
CA-210
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
White Balance
Color  Temp.
Cool
R-Gain
172
G-Gain
172
B-Gain
192
R-Cut
64
G-Cut
64
B-Cut
64
Test-Pattern
Backlight
ON
100
Reset
To Set
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Country Group
6. Area Option
7. ADC Calibration
8. White Balance
9. 10 Point WB
10. Test Pattern
11. EDID D/L
12. Sub B/C
13. Touch Sensitivity Settin 
4.2. EYE-Q function check
Step 1) Turn on the TV set.
Step 2) Press “EYE” key on Adjustment remote control.
Step 3) Cover the Eye Q sensor at the front of set for 6 seconds.
Step 4) Check the value of Sensor Data. It must be below 10. 
If not so, the Eye Q sensor may have some defect.
Change the Eye Q sensor.
Step 5) Wait for 6 seconds after withdrawing form the Eye Q
sensor.
Step 6) Check the value of Backlight. It must rise. 
If not so, the Eye Q sensor may have some defect.
Change the Eye Q sensor.
* EYE-Q Test is except for LV23xx/LK33x/LK43x series.
4.3. Outgoing condition Configuration
- When pressing IN-STOP key by Service remote control, Red
LED are blinked alternatively. And then automatically turn
off. (Must not AC power OFF during blinking)
5. GND and HI-POT Test
5.1. GND & HI-POT auto-check preparation
Check the Power cable and Signal cable insertion condition
5.2. GND & HI-POT auto-check
(1) Pallet moves in the station. (Power cord / AV cord is tightly
inserted)
(2) Connect the AV JACK Tester.
(3) Controller (GWS103-4) on.
(4) GND Test (Auto) 
- If Test is failed, Buzzer operates.
- If Test is passed, execute next process (Hi-pot test).
(Remove A/V CORD from A/V JACK BOX.) 
(5) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next process
automatically.
5.3. Checkpoint
(1) Test voltage
- GND: 1.5 KV / min at 100 mA
- SIGNAL: 3 KV / min at 100 mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = Power cord GND and Signal cord GND.
- Hi-pot Test = Power cord GND and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5 mArms
6. Model name & Serial number D/L
• Press “Power on” key of service remote control.
(Baud rate : 115200 bps)
• Connect RS232 Signal Cable to RS-232 Jack.
• Write Serial number by use RS-232.
• Must check the serial number at the Diagnostics of SET UP
menu(Refer to below.)
6.1. Signal TABLE
CMD : A0h
LENGTH : 85~94h (1~16 bytes)
ADH : EEPROM Sub Address high (00~1F)
ADL : EEPROM Sub Address low (00~FF)
Data : Write data
CS : CMD + LENGTH + ADH + ADL + Data_1 +…+ Data_n
Delay : 20ms
6.2. Command Set
* Description
FOS Default write : <7mode data> write
Vtotal, V_Frequency, Sync_Polarity, Htotal, Hstart, Vstart, 0,
Phase
Data write: Model name and Serial number write in EEPROM,.
6.3. Method & notice
A. Serial number D/L is using of scan equipment.
B. Setting of scan equipment operated by Manufacturing
Technology Group.
C. Serial number D/L must be conformed when it is produced
in production line, because serial number D/L is mandatory
by D-book 4.0.
- 12 -
CMD 
LENGTH
ADH 
ADL 
DATA_1
. . . 
Data_n 
CS 
DELAY 
<Step 2>
<Step 5>
<Step 6>
<Step 3>
<Step 4>
No.
Adjust mode
CMD(hex)
LENGTH(hex)
Description
1
EEPROM WRITE
A0h
84h+n
n-bytes Write(n=1~16)
* Manual Download (Model Name and Serial Number)
If the TV set is downloaded by OTA or Service man, sometimes
model name or serial number is initialized.(Not always)
There is impossible to download by bar code scan, so It need
Manual download.
1) Press the ‘Instart’ key of Adjustment remote control.
2) Go to the menu ‘6.Model Number D/L’ like below photo.
3) Input the Factory model name(ex 32LV3400-ZG) or Serial
number like photo.
4) Check the model name Instart menu. -> Factory name
displayed. (ex 32LV3400-ZG)
5) Check the Diagnostics. (DTV country only) -> Buyer model
displayed. (ex 32LV3400)
7. CI+ Key Download method
(1) Download Procedure
1) Press “Power on” key of a service remote control.
(Baud rate : 115200 bps)
2) Connect RS232-C Signal Cable.
3) Write CI+ Key through RS-232-C.
4) Check whether the key was downloaded or not at ‘In
Start’ menu. (Refer to below.)
=> Check the Download to CI+ Key value in LGset. 
(1) Check the method of CI+ Key value.
a. Check the method on Instart menu.
b. Check the method of RS232C Command.
1) Into the main assembly mode (RS232 : aa 00 00)
2) Check the key download for transmitted command.
(RS232 : ci 00 10)
3) Result value
- normally status for download : OKx
- abnormally status for download : NGx
(2) Check the method of CI+ Key value.(RS232)
1) Into the main ass’y mode (RS232 : aa 00 00)
2) Check the method of CI+ key by command
(RS232 : ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
- 13 -
CMD 1
CMD 2
Data 0
A
A
0
CMD 1
CMD 2
Data 0
C
I
1
CMD 1
CMD 2
Data 0
A
A
0
CMD 1
CMD 2
Data 0
C
I
2
CI+ key Value
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