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Model
37LN54XX 37LN5403 37LN5405 37LN540U 37LN541U (CHASSIS:LD31B LD36B)
Pages
76
Size
8.43 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37ln54xx-37ln5403-37ln5405-37ln540u-37ln541u-chass.pdf
Date

LG 37LN54XX / 37LN5403 / 37LN5405 / 37LN540U / 37LN541U (CHASSIS:LD31B / LD36B) Service Manual ▷ View online

- 11 -
* After downloading, have to adjust Tool Option again.
(1) Push "IN-START" key in service remote control.
(2) Select "Tool Option 1" and push "OK" key.
(3) Punch in the number. (Each model has their number)
(4) Completed selecting Tool option.
3.1. ADC Process
*   If ADC  processes  as  OTP,  There  is  no  need  to  proceed 
internal ADC.
- Enter Service Mode by pushing "ADJ" key,
Calibration".
<Caution>  Using  "power  on"  key  of  the Adjustment  remote 
control, power on TV.
* ADC Calibration Protocol (RS232)
Adjust Sequence
▪ aa 00 00 [Enter Adjust Mode]
▪ xb 00 40 [Component Input480i)]
▪ ad 00 10 [Adjust 480i Comp1]
▪ aa 00 90 End Adjust mode
* Required equipment : Adjustment remote control.
3.2. EDID Download
▪ After enter Service Mode by pushing "ADJ" key.
▪ Enter EDID D/L menu.
▪ Enter "START" by pushing "OK" key.
<Caution>  Never connect HDMI && D-sub cable when EDID 
downloaded.
3.3. EDID data
(1) HD HDMI EDID data(2D Model)
(2) Detail EDID Options are below
a. Product ID
b. Serial No: Controlled on production line.
c. Month, Year: Controlled on production line:
ex) Week : '01' -> '01'
Year : '2013' -> '17' fix
d. Model Name(Hex):
cf) TV set’s model name in EDID data is below. 
e. Checksum: Changeable by total EDID data.
f. Vendor Specific(HDMI)
3.4 Function Check
- Check display and sound 
■ Check Input and Signal items.
1) TV
2) AV (SCART / CVBS)
3) COMPONENT (480i)
4) HDMI
* Display and Sound check is executed by Remote control.
<Caution>
Not to push the INSTOP key after completion if the function 
inspection.
NO
Item
CMD 1 CMD 2 Data 0
Enter
Adjust MODE
Adjust 
‘Mode In’
A
A
0
0
When transfer the  ‘Mode In’, 
Carry the command.
ADC adjust
ADC Adjust
A
D
1
0
Automatically adjustment
(The use of a internal pattern)
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 A0 5A 78 0A EE 91 A3 54 4C 99 26
20 0F 50 54 A1 08 00 31 40 45 40 61 40 71 40 01 01
30 01 01 01 01 01 01 66 21 50 B0 51 00 1B 30 40 70
40 36 00 40 84 63 00 00 1E 64 19 00 40 41 00 26 30
50 18 88 03 06 40 84 63 00 00 18 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 22 F1 4E 10 1F 04 93 05 14 03 02 12 20 21
90 22 15 01 26 15 07 50 09 57 07
f
A0 80 1E 01 1D 80 18 71 1C 16 20 58 2C 25 00 A0 5A
B0 00 00 00 9E 01 1D 00 72 51 D0 1E 20 6E 28 55 00
C0 20 C2 31 00 00 1E 8C 0A D0 8A 20 E0 2D 10 10 3E
D0 96 00 A0 5A 00 00 00 18 02 3A 80 18 71 38 2D 40
E0 58 2C 45 00 A0 5A 00 00 00 1E 00 00 00 00 00 00
F0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
e
MODEL NAME
HEX
EDID Table
DDC Function
HD/FHD Model
0001
01 00
Analog/Digital
Model name
MODEL NAME(HEX)
LG TV
00 00 00 FC 00 4C 47 20 54 56 0A 20 20 20 20 20 20 20 (LG TV)
EDID C/S data
HD
HDMI
Check sum
(Hex)
Block 0
A3
Block 1
5B (HDMI1)
4B (HDMI2)
Input
Model name(HEX)
HDMI1
67030C001000801E
HDMI2
67030C002000801E
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option Commercial
6. Country Group
7. Area Option
8.ADC Calibration 
► 
9. White Balance
10. 10 Point WB
11. Test Pattern
12 EDID D/L
13. Sub B/C
14. Ext. Input Adjust
ADC Calibration
ADC Comp 480i
ADC Comp 1080p
ADC Type
 
 
OK
OK
OTP
Start
Reset
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option Commercial
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L 
 
13. Sub B/C
14. Ext. Input Adjust
EDID D/L
  HDMI1 
NG
  HDMI2 
NG
Start
Reset
- 12 -
4. Total Assembly line process
4.1. White Balance adjustment
▪ W/B Equipment condition
CA210 : LED -> CH14, Test signal: Inner pattern(80IRE)
▪  Above 5 minutes H/run in the inner pattern. (“power on” key 
of adjust remote control) 
▪  If it is executed W/B adjustment in 2~3 minutes H/run, it is 
adjusted by Target data.
  (For OS LED / Direct LED module)
▪ Normal line
*  Aging chamber
* 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 10 cm distance, keep it with the surface of the 
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 5 minutes.
-  Using 'no signal' or 'POWER ONLY' or the others, check 
the back light on.
▪ Auto adjustment Map(using RS-232C to USB cable)
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 adjust Remote control.
▪ After enter Service Mode by pushing "ADJ" key,
▪  Enter  White  Balance  by  pushing  "►"  key  at  "8.  White 
Balance".
* CASE Cool Mode
First  adjust  the  coordinate  far  away  from  the  target 
value(x, y).B.
1) x, y > target
2) x, y < target
3) x >target, y < target
4) x < target, y > target
   -  Every 4 case have to fit y value by adjusting B Gain 
and then fit x value by adjusting R-Gain.
   -  In  this  case,  increasing/decreasing  of  B  Gain  and  R 
Gain can be adjusted.
Mode
Temp
Coordinate spec
Target
Cool
13,000 K X=0.269 (±0.002)
Y=0.273 (±0.002)
X=0.271
Y=0.276
Medium
9,300 K
X=0.285 (±0.002)
Y=0.293 (±0.002)
X=0.287
Y=0.296
Warm
6,500 K
X=0.313 (±0.002)
Y=0.329 (±0.002)
X=0.315
Y=0.332
NetCase4 Aging time
(Min)
Cool
Medium
Warm
X
y
x
y
x
y
269
273
285
293
313
329
1
0-2
280
287
296
307
320
337
2
3-5
279
285
295
305
319
335
3
6-9
277
284
293
304
317
334
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
80-119
270
274
286
294
310
324
9
Over 120
269
273
285
293
309
323
Full White Pattern
CA-210
COLOR
ANALYZER
TYPE : CA-210
RS-232C Communication
RS-232C COMMAND
[CMD ID DATA]
MIN
CENTER
(DEFAULT)
MAX
Cool
Mid
Warm
Cool Mid Warm
R Gain jg
Ja
jd
00
172
192 192
192
G Gain jh
Jb
je
00
172
192 192
192
B Gain ji
Jc
jf
00
192
192 172
192
R Cut
64
64
64
128
G Cut
64
64
64
128
B Cut
64
64
64
128
NetCase4 Aging time
(Min)
Cool
Medium
Warm
X
y
x
y
x
y
269
273
285
293
313
329
1
0-2
276
282
292
302
316
332
2
3-5
274
280
290
300
314
330
3
6-9
273
278
289
298
313
328
4
10-19
272
276
288
296
312
326
5
20-35
271
274
287
294
311
324
6
36-49
270
272
286
292
310
322
7
50-79
266
269
282
289
306
319
 8
80-119
264
267
280
287
304
317
9
Over 120
263
266
279
286
303
316
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option Commercial
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12 EDID D/L
13. Sub B/C
14. Ext. Input Adjust
Whit Balance
Color Temp. 
 
R-Gain
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern
Backlight
Reset 
      To Set
Cool
172
172
192
64
64
64
ON
100
- 13 -
How to adjust
1) In case G gain more than 172
    Adjust R Gain and B Gain less than 192 
2) if the G gain value be adjusted down to 172
     G  gain  increase  to  172  and  R  gain  /  B  gain  increase 
same as G gain increases.
3)  if R Gain / B Gain is more than 255 , the G gain adjust 
to less than 172.
* CASE Medium / Warm
First  adjust  the  coordinate  far  away  from  the  target 
value(x, y).
1) x, y > target
i) Decrease the R, G. 
2) x, y < target
i) First decrease the B gain, 
ii) Decrease the one of the others.
3) x > target, y < target
i) First decrease B, so make y a little more than the target.
ii) Adjust x value by decreasing the R
4) x < target, y > target
i) First decrease B, so make x a little more than the target.
ii) Adjust x value by decreasing the G
*  After you finished 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”.
4.2. 3D function test
(Pattern Generator MSHG-600, MSPG-6100[Support HDMI1.4])
* HDMI mode NO. 872 , pattern No.83
(1)  Please input 3D test pattern like below. 
(2)  When 3D OSD appear automatically , then select OK key.
(3)  Don't wear a 3D Glasses, Check the picture like below.
4.3. IR emitter inspection
(1) Start 3D pattern inspection.
(2)  If IR emitter signal is correctly received to IR receiver, the 
lamp of IR tester turns on.
4.4. MHL Test
(1) Turn on TV
(2) Select HDMI2 mode using input Menu.
(3)  Set  MHL  Zig(M1S0D3617)  using  MHL  input,  output  and 
power cord.
(4) Connect HDMI cable between MHL Zig and HDMI4 port.
Result)  If,  The  LED  light  is  green  and  the  Module  shows 
normal stream → OK, Else → NG
- 14 -
4.5. Outgoing condition Configuration
■  When  pressing  IN-STOP  key  by  SVC  remocon,  Red  LED 
are blinked alternatively. And then automatically turn off.
(Must not AC power OFF during blinking)
5. HI-POT Test
5.1. HI-POT auto-check preparation
-  Check the POWER cable and SIGNAL cable insertion condition
5.2. 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) HI-POT test (Auto)
- If Test is failed, Buzzer operates.
- If Test is passed, GOOD Lamp on and move to next proc-
ess automatically.
5.3. Checkpoint
(1) Test voltage
- Touchable Metal : 3 KV / min at 100 mA
- SIGNAL : 3KV / min at 100 mA
(2) TEST time: 1 second. (case : mass production )
(3) TEST POINT
- Touchable Metal => LIVE & NEUTRAL : Touchable Metal.
- SIGNAL => LIVE & NEUTRAL : SIGNAL.
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
▪  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
(1) Serial number D/L is using of scan equipment.
(2)  Setting  of  scan  equipment  operated  by  Manufacturing 
Technology Group.
(3)  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.
* 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 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-ZG)
CMD
LENGTH
ADH
ADL
DATA_1
. . .
Data_n
CS
DELAY
Adjust mode
CMD(hex)
LENGTH(hex)
Description
EEPROM WRITE
A0h
84h+n
n-bytes Write (n = 1~16)
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