DOWNLOAD LG 37LT760H (CHASSIS:LD2FF) Service Manual ↓ Size: 6.97 MB | Pages: 55 in PDF or view online for FREE

Model
37LT760H (CHASSIS:LD2FF)
Pages
55
Size
6.97 MB
Type
PDF
Document
Service Manual
Brand
Device
TV / LCD
File
37lt760h-chassis-ld2ff.pdf
Date

LG 37LT760H (CHASSIS:LD2FF) Service Manual ▷ View online

- 11 -
3.6.1. Check the method of CI+ Key value
(1) Check the method on Instart menu
(2) Check the method of RS232C Command 
1) Into the main ass’y 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
3.6.2. Check the method of CI+ key value(RS232)
1) Into the main ass’y mode(RS232: aa 00 00)
2) Check the mothed of CI+ key by command
    (RS232: ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
3.7. WIFI MAC ADDRESS CHECK
(1) Using RS232 Command
(2) Check the menu on in-start
4. Manual Adjustment
*  ADC  adjustment  is  not  needed  because  of  OTP(Auto ADC 
adjustment)
4.1.  EDID(The  Extended  Display  Identification 
Data)/DDC(Display Data Channel) download
4.1.1. Overview
It is a VESA regulation. A PC or a MNT will display an optimal 
resolution  through  information  sharing  without  any  necessity 
of user input. It is a realization of "Plug and Play".
4.1.2. Equipment
-  Since  embedded  EDID  data  is  used,  EDID  download  JIG, 
HDMI cable and D-sub cable are not need.
- Adjustment remote control
4.1.3. Download method
(1)  Press  "ADJ"  key  on  the Adjustment  remote  control  then 
select "12.EDID D/L", By pressing "Enter" key, enter EDID 
D/L menu.
(2)  Select  "Start"  button  by  pressing  "Enter"  key,  HDMI1/ 
HDMI2/ HDMI3/ HDMI4/ RGB are writing and display OK 
or NG.
4.1.4. EDID DATA
▪ HDMI_EDID DATA_2D
▪ RGB_EDID
H-freq(kHz)
V-freq.(Hz)
Transmission
[A][I][][Set ID][][20][Cr]
[O][K][X] or [NG]
CMD 1
CMD 2
Data 0
A
A
0
0
CMD 1
CMD 2
Data 0
C
I
1
0
CMD 1
CMD 2
Data 0
A
A
0
0
CMD 1
CMD 2
Data 0
C
I
2
0
 
CI+ Key Value
For Analog
For HDMI EDID
D-sub to D-sub
DVI-D to HDMI or HDMI to HDMI
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
ⓐⓓ
0x01
01
03
80
A0
5A
78
0A
EE
91
A3
54
4C
99
26
0x02 0F
50
54
A1
08
00
31
40
45
40
61
40
71
40
81
80
0x03 01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
0x04 45
00
A0
5A
00
00
00
1E
66
21
50
B0
51
00
1B
30
0x05 40
70
36
00
A0
5A
00
00
00
1E
00
00
00
FD
00
3A
0x06 3E
1F
53
10
00
0A
20
20
20
20
20
20
0x07
01 ⓔ1
0x00 02
03
26
F1
4E
10
9F
04
13
05
14
03
02
12
20
21
0x01 22
15
01
26
15
07
50
09
57
07
0x02
E3
05
00
00
00
1D
80
18
71
1C
16
20
58
2C
0x03 25
00
A0
5A
00
00
00
9E
01
1D
00
80
51
D0
1A
20
0x04 6E
88
55
00
A0
5A
00
00
00
1A
02
3A
80
18
71
38
0x05 2D
40
58
2C
45
00
A0
5A
00
00
00
1E
66
21
50
B0
0x06 51
00
1B
30
40
70
36
00
A0
5A
00
00
00
1E
00
00
0x07 00
00
00
00
00
00
00
00
00
00
00
00
00
00
00 ⓔ2
0x00 0x01 0x02 0x03 0x04 0x05 0x06 0x07 0x08 0x09 0x0A 0x0B 0x0C 0x0D 0x0E 0x0F
0x00 00
FF
FF
FF
FF
FF
FF
00
1E
6D
0x01
01
03
68
A0
5A
78
0A
EE
91
A3
54
4C
99
26
0x02 0F
50
54
A1
08
00
31
40
45
40
61
40
71
40
81
80
0x03 01
01
01
01
01
01
02
3A
80
18
71
38
2D
40
58
2C
0x04 45
00
A0
5A
00
00
00
1E
66
21
50
B0
51
00
1B
30
0x05 40
70
36
00
A0
5A
00
00
00
1E
00
00
00
FD
00
3A
0x06 3E
1E
53
10
00
0A
20
20
20
20
20
20
0x07
00 ⓔ3
- 12 -
▪ Reference
- HDMI1 ~ HDMI3 / RGB 
-  In  the  data  of  EDID,  bellows  may  be  different  by  S/W  or 
Input mode. 
 Product ID
 Serial No:  Controlled on production line.
 Month, Year: Controlled on production line:
ex) Monthly : ‘01’ → ‘01’
           Year    : ‘2012’ → ‘16’
 Model Name(Hex): LGTV
 Checksum(LG TV): Changeable by total EDID data.
 Vendor Specific(HDMI)
4.2. White Balance Adjustment
4.2.1. Overview
▪ W/B adj. Objective & How-it-works
(1) Objective: To reduce each Panel's W/B deviation
(2)  How-it-works : When R/G/B gain in the OSD is at 192, it 
means the panel is at its Full Dynamic Range. In order to 
prevent saturation of Full Dynamic range and data, one 
of R/G/B is fixed at 192, and the other two is lowered to 
find the desired value. 
(3) Adjustment condition : normal temperature
1) Surrounding Temperature : 25 °C ± 5 °C
2) Warm-up time: About 5 Min
3) Surrounding Humidity : 20 % ~ 80 %
4.2.2. Equipment
(1) Color Analyzer: CA-210 (LED Module : CH 14)
(2)  Adjustment Computer(During auto adj., RS-232C protocol 
is needed)
(3) Adjustment Remote control
(4)  Video Signal Generator MSPG-925F 720p/216-Gray
(Model: 217, Pattern: 78)
→ Only when internal pattern is not available
▪ Color Analyzer Matrix should be calibrated using CS-1000.
4.2.3. Equipment connection MAP
4.2.4. Adj. Command (Protocol)
<Command Format>
- LEN: Number of Data Byte to be sent
- CMD: Command
- VAL: FOS Data value
- CS: Checksum of sent data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]
▪ RS-232C Command used during auto-adjustment.
Ex)  wb 00 00   ->  Begin white balance auto-adj.
 
wb 00 10   ->  Gain adj.
 
ja 00 ff   ->  Adj. data
 
jb 00 c0
 
...
 
...
 
wb 00 1f   → Gain adj. completed
    *(wb 00 20(Start), wb 00 2f(end)) → Off-set adj.
 
wb 00 ff   → End white balance auto-adj.
HEX
EDID Table
DDC Function
0001
01 00
Analog
0001
01 00
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)
1
2
3
HDMI1
43
15
X
HDMI2
43
5
X
HDMI3
43
F5
X
RGB
X
X
5C
Input
Model name(HEX)
HDMI1
67 03 0C 00 10 00 80 2D
HDMI2
67 03 0C 00 20 00 80 2D
HDMI3
67 03 0C 00 30 00 80 2D
START 6E A 50 A LEN A 03 A CMD
A
00
A VAL A
CS STOP
Color Analyzer
 
Computer 
Pattern Generator
 
RS-232C 
RS-232C 
RS-232C 
Probe
Signal Source
* If TV internal pattern is used, not needed
RS-232C COMMAND
[CMD 
ID 
DATA]
Explantion
wb
00
00
Begin White Balance adjustment
wb
00
10
Gain adjustment(internal white pattern)
wb
00
1f
Gain adjustment completed
wb
00
20
Offset adjustment(internal white pattern)
wb
00
2f
Offset adjustment completed
wb
00
ff
End White Balance adjustment
(internal pattern disappears )
- 13 -
▪ Adj. Map
4.2.5. Adjustment method
(1) Auto WB calibration
1)  Set TV in ADJ mode using P-ONLY key(or POWER ON 
key)
2) Place optical probe on the center of the display
    -  It  need  to  check  probe  condition  of  zero  calibration 
before adjustment.
3) Connect RS-232C Cable.
4) Select mode in ADJ Program and begin a adjustment.
5)  When  WB  adjustment  is  complete  with  OK  message, 
adjustment status of pre-set mode(Cool, Medium, Warm)
6) Remove probe and RS-232C cable
▪  W/B Adj. must begin as start command “wb 00 00” , and 
finish as end command “wb 00 ff”, and Adj. offset if need.
4.2.6.  Reference (White balance Adj. coordinate and 
color temperature)
▪ Luminance : 204 Gray, 80IRE
▪ Standard color coordinate and temperature using CS-1000
  (over 26 inch)
▪ Standard color coordinate and temperature using CA-210(CH 14)
(1) LGD
(2) O/S Module(AUO, CMI, Sharp,IPS…)
▪  Standard  color  coordinate  and  temperature  using  CA-210 
(CH 14) - by aging time
1) Edge LED models (applied only LGD Module) in LGERS
2)  Edge LED models (applied only LGD Module) in LGEKR 
(GUMI) (wintertime)
4.3. Tool Option selection
▪  Method : Press "ADJ" key on the Adjustment remote control, 
then select Tool option.
Mode
Coordinate
Temp
∆uv
x
y
Cool
0.269
0.273
13000 K
0.0000 
Medium
0.285
0.293
9300 K
0.0000 
Warm
0.313
0.329
6500 K
0.0000 
Mode
Coordinate
Temp
∆uv
x
y
Cool
0.269 ± 0.002 0.273 ± 0.002 13,000 K 0.0000 
Medium 0.285 ± 0.002 0.293 ± 0.002 9,300 K 0.0000 
Warm
0.313 ± 0.002 0.329 ± 0.002
6,500K 0.0000 
GP2
Aging 
time
(Min)
Cool
Medium
Warm
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
Adj. item
Command
(lower caseASCII)
Data Range
(Hex.)
Default
(Decimal)
CMD1
CMD2
MIN
MAX
Cool
R Gain
j
g
00
C0
G Gain
j
h
00
C0
B Gain
j
i
00
C0
R Cut
G Cut
B Cut
Medium
R Gain
j
a
00
C0
G Gain
j
b
00
C0
B Gain
j
c
00
C0
R Cut
G Cut
B Cut
Warm
R Gain
j
d
00
C0
G Gain
j
e
00
C0
B Gain
j
f
00
C0
R Cut
G Cut
Mode
Coordinate
Temp
∆uv
x
y
Cool
0.271 ± 0.002 0.276 ± 0.002 13,000 K 0.0000 
Medium 0.287 ± 0.002 0.296 ± 0.002 9,300 K 0.0000 
Warm
0.315 ± 0.002 0.332 ± 0.002 6,500 K 0.0000 
GP2
Aging 
time
(Min)
Cool
Medium
Warm
X
y
x
y
x
y
269
273
285
293
313
329
1
281
293
297
313
321
343
338
2
280
290
296
310
320
340
336
3
279
289
295
309
319
339
335
4
277
286
293
306
317
333
333
5
275
282
291
302
315
332
330
6
273
278
289
298
313
328
327
7
271
276
287
296
311
326
325
8
270
274
286
294
310
324
324
9
269
273
285
293
309
323
323
- 14 -
4.4. Wi-Fi Test
Step 1) Turn on TV
Step 2) Select Network Connection option in Network Menu.
 
  Instart menu -> Menu -> Network Setup
Step 3) Select Start Connection button in Network Connection.
Step 4)  If the system finds any AP like blow PIC, it is working 
well.
4.5. HDMI ARC Function Inspection
4.5.1. Test equipment
- Optic Receiver Speaker
- MSHG-600 (SW: 1220 ↑) 
- HDMI Cable (for 1.4 version)
4.5.2. Test method
(1)  Insert  the  HDMI  Cable  to  the  HDMI ARC  port  from  the 
master equipment (HDMI1)
(2) Check the sound from the TV Set
(3)  Check  the  Sound  from  the  Speaker  or  using AV  &  Optic 
TEST program (It’s connected to MSHG-600)
* Remark:  Inspect in Power Only Mode and check SW version 
in a master equipment
5. Check Commercial features
5.1. External SPK Out
5.1.1. Equipment & Condition
▪ Jig (Speaker out JIG) or Oscilloscope
▪ Power only mode
5.1.2. Check the speaker out
1) Connect the External Speaker : check the sound
    Connect oscilloscope, you can see this waveform.
Mode info.
Commercial Feature
Name
inch
IR 
Out
DC
Power
Out(12V)
Ext 
SPK 
Out
RJP
(HDMI 
interface)
Pro:Idiom 
LT760H-ZA 32/37/42/47
O
O
O
O
O
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