LG 26LN45XX / 26LN4505 (CHASSIS:LC31A / LD31T) Service Manual ▷ View online
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3.1. EDID Process
3.1.1. EDID download
(1) Press "Power only" key of service remote control.
(2) Press the ADJ KEY on R/C and enter EZ ADJUST
(3) Enter EDID D/L mode by pushing "►" key at "11. EDID D/L".
(4) EDID download is executed automatically.
(5) Press EXIT key on service remote control.
<Caution>
- Never connect HDMI & D-sub Cable when download EDID.
- Download HDMI
* Edid data and Model option download (USB)
3.1.2. RGB EDID Data
(1) All models without 29MN33D(Product ID: 22984/HEXA: 59C8)
*(week), **(year), ***(Check sum) : Adjustable Data
: Screen size,
: Color Characteristics
3.1.3. HDMI EDID Data
(1) All models(Product ID: 22986/HEXA:59CA)
*(week), **(year), ***(Check sum) : Adjustable Data
**** (physical address): (HDMI : 10), ****(Check sum): (HDMI : CE)
: Screen size,
: Color Characteristics
3.2. Function Check
3.2.1. Check display and sound
*Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) RGB(PC : 1366 x 768 @ 60Hz)
5) HDMI(PC : 1366 x 768 @ 60Hz)
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.
3.3. CI+ key writing process. (Device CN)
3.3.1. Communication Port Connection
Connection : PCBA (USB Port) → USB to Serial Adapter
(UC-232A) → RS-232C cable → PC(RS-232C port)
* Caution: LD31Q/LD31A chassis support only UC-232A
driver. (only use this one)
3.3.2. CI+ Key Download
(1) Set CI+ Key path Directory at Start Mac & CI+ Download
Programme.
(2) Set COM 1,2,3,4 / 115200(Baudrate) (1)/(2)
(3) Click port connection button(1)
(4) Start CI+ Key Download, Push the button(4)
(5) Check OK or NG
(6) After completing download, CI + key values are increase
by one automatically. To write CI+ key next SET, click CI+
key writing button(5) directly.
(7) Check whether the key was downloaded or not at ‘In Start’
menu. (Refer to below).
NO
Item
CMD 1 CMD 2 Data 0
Enter download
MODE
Download
‘Mode In’
A
A
0
0 When transfer the ‘Mode
In’, Carry the command.
EDID data and
Model option
download
Download
A
E
00 10 Automatically download
(The use of a internal Data)
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
9. White Balance
10. 10 Point WB
11. Test Pattern
12. EDID D/L
►
14. Touch Sensitivity Setting
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17.SPDIF Lipsync Adjust
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17.SPDIF Lipsync Adjust
EDID D/L
HDMI
OK
RGB
OK
Start
Reset
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=> Check the Download to CI+ Key value in LG set.
(1) Check the method of CI+ Key value
1) Check the method on Instart menu
2) Check the method of RS232C Command
a. Into the main ass’y mode(RS232: aa 00 00)
b. Check the key download for transmitted command
(RS232: ci 00 10)
c. 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 mothed of CI+ key by command
(RS232: ci 00 20)
3) Result value
i 01 OK 1d1852d21c1ed5dcx
4. Total Assembly line process
4.1. Tool option & ADC Check
(1) Press "Power on" key of service remote control.
(2) Connect USB Port → USB to Serial Adapter (UC-232A) →
RS-232C cable → PC(RS-232C port)
(3) Check the 'Tool Option'(Refer to the BOM Comments or
Adjustment spec)
(4) Check the ‘ADC’ is ok.
4.2. Model name & Serial number download
4.2.1. Model name & Serial number D/L
1) Press "Power on" key of service remote control.
2) Connect RS232 Signal Cable to RS-232 Jack.
3) Write Model Name & Serial Number by use RS-232.
4) Must check the serial number at the Diagnostics of SET UP
menu. (Refer to below.)
4.2.2. Method & notice
(1) Model Name & 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 ADJ remote control.
2) Go to the menu '6.Model Number D/L' like below photo.
3) Input the Factory model name(ex 24LN4500) or Serial
number like photo.
4) Check the model name Instart menu → Factory name
displayed (ex 24LN4500)
5) Check the Diagnostics (DTV country only) → Buyer
model displayed (ex 24LN4500)
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
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4.3. Function Check
4.3.1. Check display and sound
■ Check Input and Signal items. (cf. work instructions)
1) TV
2) AV (SCART/CVBS)
3) COMPONENT (480i)
4) RGB(PC : 1366 x 768 @ 60Hz)
5) HDMI(PC : 1366 x 768 @ 60Hz)
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.
4.3.2. PCMCIA CARD Check
You must adjust DTV 29 Channel and insert PCMCIA CARD
to socket.
- If PCMCIA CARD works normally, video signals will appear
on screen. But it works abnormally, "No CA module" will
appear on screen.
* Caution: Set up "RF mode" before launching products.
4.3.3. PIP Check
(1) Press “Power on” key of service remote control.
(2) Input RGB & TV(ATV or DTV) signal.
(3) Set Input mode to RGB.
(4) Press ‘PIP” key of ADJ remote control
(5) Check TV Video & Audio signal of Sub picture.
4.3.4 HDMI MHL Function Inspection(HDMI2 Port only)
(1) Insert HDMI cable for MHL function JIG connected to
HDMI2 port of the SET.
(2) Check that LED of JIG is green light and check that set
screen is correctly worked.
(3) If NG situation or other HDMI jack connection, LED of JIG
is red light and screen is not displayed.
4.4. White balance adjustment
- Equipment
(1) Color Analyzer: CA-210 (LED Module : CH 14)
(2) Adj. Computer(During auto adj., RS-232C protocol is
needed)
(3) Adjust Remote control
RGB Gains are fixed data for each model.
Insert RS-232C Jack which is connected with PC for White
Balance or equivalent device.
→ Total Assembly line should be check whether the color
coordinate(x,y) data refer to below table were meet or not.
- Cool Panel
* Note : x,y coordinates are drifted about 0.007 after 30 mins
heat-run. So checking color coordinate within 5-min at
total assembly line, consider x,y coordinates might be
up to 0.007 than x,y target of each color temperature.
* Note : Manual W/B process using adjusts Remote control.
1) After enter Service Mode by pushing "ADJ" key,
2) Enter "White Balance" by pushing "►" key at "White
Balance".
* When doing Adjustment, Please make circumstance as
below.
Color
Temperature
Cool
13,000
K X=0.276 (±0.03)
Y=0.275 (±0.03)
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium
9,300
K X=0.290 (±0.03)
Y=0.298 (±0.03)
Warm
6,500
K X=0.318 (±0.03)
Y=0.334 (±0.03)
Luminance
(cd/m²)
Cool
Min : 80
K Typ : 110
<Test Signal>
Inner pattern
(204gray,80IRE)
Medium Min : 80
K Typ : 110
Warm
Min : 70
K Typ : 110
EZ ADJUST
0. Tool Option1
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
6. Country Group
7. Area Option
8. ADC Calibration
1. Tool Option2
2. Tool Option3
3. Tool Option4
4. Tool Option5
5. Tool Option6
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. Touch Sensitivity Setting
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17.SPDIF Lipsync Adjust
11. Test Pattern
12 EDID D/L
13. Sub B/C
14. Touch Sensitivity Setting
15. Ext. Input Adjust
16. SPK Lipsync Adjust
17.SPDIF Lipsync Adjust
Whit Balance
Color Temp.
◄
►
R-Gain
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern
Backlight
Reset
G-Gain
B-Gain
R-Cut
G-Cut
B-Cut
Test-Pattern
Backlight
Reset
To Set
Cool
100
104
192
104
192
64
64
64
64
64
ON
100
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4.5. DPM Operation check
■ Measurement Condition: 100~240V@ 50/60Hz
(1) Set Input to RGB-PC and connect D-sub cable to set -
RGB Mode.
Set Input to HDMI(with Input Label set to PC) and connect
HDMI cable to set - HDMI Mode
(2) Cut off H sync or V sync of signal.
(3) Check DPM operation refer to the below table.
■ HDMI DPM Operating condition
- Input Label: HDMI (PC&DVI Mode)
4.6. Model name & SW version & Adjust check
* Press the ‘Instart’ key of ADJ remote control.
4.6.1. Model Name& SW Version Check
1) Check ‘Model Name’.
2) Check ‘S/W Version’ (Refer to the IC Ver. in the BOM)
4.6.2. Adjust Check
1) Check ‘Country Group’
2) Check ‘Area Option’
3) Check ‘Tool Option’ (Refer to the BOM Comments)
4) Check ‘Adjust ADC[Comp&RGB]’ is OK.
5) Check ‘EDID[RGB&HDMI]’ is OK.
* After check all, Press the 'EXIT' key of ADJ remote control to
go out SVC menu.
4.7. Outgoing condition Configuration
* After all function test., press IN-STOP key by SVC Remote
control. And make Outgoing Condition.
Operating Condition
Sync(H/V) Video LED(SET) Wattage(W)
Power S/W On Sleep mode -
RGB, HDMI
Off/Off
Off
Amber
1
MHL Cable
HDMI & HDMI to DVI Cable
DPM
X
O
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