55LM6200 (CHASSIS:LA22E) — LG TV Service Manual (repair manual). Page 16

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5.3. Local Dimming Inspection
(1)  Press  ‘TILT”  key  of  the  Adj.  R/C  and  check  moving 
patterns. The black bar patterns moves from top to bottom.
      If a local dimming function does not work, a whole screen 
shows full white.
<T120 Model>
<T240 Model>
 Except No local-dimming models
5.4. EYE-Q Check  
Step 1) Turn on the TV..
Step 2)  Press  'EYE  button'  on  the  adjustment  remote-
controller.
Step 3)  Cover  'Eye  Q  sensor'  on  the  front  of  set  with  your 
hands, hold it for 6 seconds.
Step 4)  Check "the Sensor Data" on the screen, make certain 
that  Data  is  below  10.  If  Data  isn’t  below  10  in  6 
seconds,  Eye  Q  sensor  would  be  bad.  You  should 
change Eye Q sensor.
Step 5)  Uncover  your hands  from Eye Q sensor, hold  it for 6 
seconds.
Step 6)  Check  "Back  Light(xxx)"  on  the  screen,  check  data 
increase . You should change Eye Q sensor. 
5.5. Magic Motion remote controller Check  
5.5.1. Test equipment
▪  RF-remote  controller  for  check,  IR-KEY-CODE  remote 
controller.
▪  Check AA  battery  before  test. A  recommendation  is  that  a 
tester change battery every lots.
5.5.2. Test
(1)  Make  pairing  with  TV  set  by  pressing  “Start  key(Wheel 
key)” on RCU.
(2) Check a cursor on screen by pressing ‘Wheel key” of RCU
(3)  Stop paring with TV set by pressing “Back+ Home” key of 
RCU
5.5.3. Applied models
Chassis
Model Name
Magic RF receiver
LA22E
32/42/47/55LS5700-UA
Built-in
42/47/55/65LM6200-UA
32/42/47/55LS5700-UA
42/47/55LM6700-UA
47/55LM7600-UA
 LW5700-UE  series: An  USB  dongle-type  receiver  will  be 
supplied  in  form  of  accessory.  So  this  pairing  test  is  not 
necessary for these models.
5.6. Wi-Fi MAC Address Check  
5.6.1. Using RS232 Command
Command
Set ACK
Transmission
[A][l][][Set ID][][20][Cr] [O][K][x]  or  [N][G]
5.6.2. Check the menu on in-start
 
<Step 2>
<Step 5>
<Step 6>
<Step 3>
<Step 4>
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5.7. 3D pattern test (Only for 3D models)  
5.7.1. Test equipment
(1)  Pattern  Generator  MSHG-600  or  MSPG-6100  (HDMI  1.4 
support)
(2) Pattern: HDMI mode (model No. 872, pattern No. 83)
5.7.2. Test method
(1) Input 3D test signal as Fig.1.
(2) Press ‘OK” key as a 3D input OSD is shown.
(3)  Check  pattern  as  Fig2  without  3D  glasses.  (3D  mode 
without 3D glasses)
            Fig.2   
 
 
 
                Fig.3
<OK in 3D mode without 3D glasses>         <NG in 3D mode without 3D glasses>
5.8. HDMI ARC Function Inspection  
5.8.1. Test equipment
- Optic Receiver Speaker          
- MSHG-600 (SW: 1220 ↑) 
- HDMI Cable (for 1.4 version)
5.8.2. 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
5.9. Ship-out mode check (In-stop)  
▪ After final inspection, press In-Stop key of the Adj. R/C and 
check that the unit goes to Stand-by mode        
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6. AUDIO output check
6.1. Audio input condition
(1) RF input: Mono, 1KHz sine wave signal, 100% Modulation
(2) CVBS, Component: 1KHz sine wave signal (0.4Vrms)
(3) RGB PC: 1KHz sine wave signal (0.7Vrms)
6.2. Specification
No
Item
Min
Typ
Max
Unit
Remark
1
Audio 
practical 
max Output, 
L/R
9.0
8.5
10.0
8.9
12.0
9.9
W
Vrms
(1)  Measurement 
condition
   -  EQ/AVL/Clear 
Voice: Off
(2)  Speaker (8Ω 
Impedance)
7. GND and HI-POT Test
7.1. GND & HI-POT auto-check preparation
(1)  Check  the  POWER  CABLE  and  SIGNAL  CABE  insertion 
condition
7.2. 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.
7.3. Checkpoint
(1) Test voltage
- GND: 1.5KV/min at 100mA
- SIGNAL: 3KV/min at 100mA
(2) TEST time: 1 second
(3) TEST POINT
- GND Test = POWER CORD GND and SIGNAL CABLE GND.
- Hi-pot Test = POWER CORD GND and LIVE & NEUTRAL.
(4) LEAKAGE CURRENT: At 0.5mArms
8. USB S/W Download 
    (optional, Service only)
(1) Put the USB Stick to the USB socket 
(2) Automatically detecting update file in USB Stick
  -  If  your  downloaded  program  version  in  USB  Stick  is  lower 
than  that  of TV  set,  it  didn’t  work.  Otherwise  USB  data  is 
automatically detected.
(3) Show the message “Copying files from memory”
(5) Updating Completed, The TV will restart automatically
(6)  If  your TV  is  turned  on,  check  your  updated  version  and 
Tool option. 
*  If downloading version is more high than your TV have, TV 
can lost all channel data. In this case, you have to channel 
recover. If all channel data is cleared, you didn’t have a DTV/
ATV test on production line.
* After downloading, TOOL OPTION setting is needed again.
(1) Push "IN-START" key in service remote controller.
(2) Select "Tool Option 1" and Push “OK” button.
(3) Punch in the number. (Each model has their number.)
(4) Updating is staring.
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9. Optional adjustments
9.1. Manual ADC Calibration
9.1.1. Equipment & Condition
(1) Adjustment Remocon
(2)  801GF  (802B,  802F,  802R)  or  MSPG925FA  Pattern 
Generator
- Resolution :  480i  Comp1  (MSPG-925FA:  model-209, 
pattern-65)
- Resolution :  1080p  Comp1  (MSPG-925FA:  model-225, 
pattern-65)
- Resolution :  1080p  RGB  (MSPG-925FA:  model-225, 
pattern-65)
- Pattern : Horizontal 100% Color Bar Pattern
- Pattern level : 0.7±0.1 Vp-p
9.1.2. Adjust method
8.1.2.1 ADC 480i/1080p Comp1, RGB
(1)  Check  connected  condition  of  Comp1/RGB  cable  to  the 
equipment
(2)  Give  a  480i  Mode,  Horizontal  100%  Color  Bar  Pattern  to 
Comp1. (MSPG-925FA -> Model: 209, Pattern: 65)
(3)  Change input mode as Component1 and picture mode as 
“Standard”
(4)  Press  the  In-start  Key  on  the ADJ  remote  after  at  least  1 
min of signal reception. Then, select 7.External ADC. And 
Press OK or Right Button for going to sub menu.
(5) Press OK in Comp 480i menu
(6)  Give a 1080p Mode, Horizontal 100% Color Bar Pattern to 
Comp1. (MSPG-925FA -> Model: 225, Pattern: 65)
(7) Press OK in Comp 1080p menu 
(8) Perform (6) and (7) in RGB-PC 
(9)  If ADC Comp is successful, “ADC Component Success” is 
displayed.  If ADC  calibration  is  failure,  “ADC  Component 
Fail” is displayed.
(10)  If ADC calibration is failure, after rechecking ADC pattern 
or condition, retry calibration
(11)  If  ADC  RGB  calibration  is  successful,  “ADC  RGB 
Success” is displayed. If ADC calibration is failure, “ADC 
RGB Fail” is displayed.
(12)  If ADC calibration is failure, after recheck ADC pattern or 
condition, retry calibration
9.2. Manual White balance Adjustment
9.2.1. Adj. condition and cautionary items
(1)  Lighting condition in surrounding area surrounding lighting 
should  be  lower  10  lux. Try  to  isolate  adj.  area  into  dark 
surrounding.
(2)  Probe  location:  Color Analyzer  (CA-210)  probe  should  be 
within 10cm and perpendicular of the module surface 
     (80°~ 100°)
(3) Aging time
▪  After  Aging  Start,  Keep  the  Power  ON  status  during  5 
Minutes.
▪  In  case  of  LCD,  Back-light  on  should  be  checked  using  no 
signal or Full-white pattern.
9.2.2. Equipment
(1)  Color Analyzer: CA-210 (NCG: CH 9 / WCG: CH12 / LED: 
CH14)
(2)  Adj.  Computer  (During  auto  adj.,  RS-232C  protocol  is 
needed)
(3) Adjust Remocon
(4)  Video  Signal  Generator  MSPG-925F  720p/216-Gray 
(Model: 217, Pattern: 78) 
9.2.3. Adjustment 
(1) Set TV in Adj. mode using POWER ON
(2)  Zero Calibrate the probe of Color Analyzer, then place it on 
the center of LCD module within 10cm of the surface.
(3)  Press ADJ  key  ->  EZ  adjust  using  adj.  R/C  ->  6.  White-
Balance then press the cursor to the right (KEY►). 
      When KEY(►) is pressed 216 Gray internal pattern will be 
displayed.
(4)  One of R Gain / G Gain / B Gain should be fixed at 192, 
and the rest will be lowered to meet the desired value.
(5)  Adj. is performed in COOL, MEDIUM, WARM 3 modes of 
color temperature.
 
▪  If  internal  pattern  is  not  available,  use  RF  input.  In  EZ Adj. 
menu 6.White Balance, you can select one of 2 Test-pattern: 
ON,  OFF.  Default  is  inner(ON).  By  selecting  OFF,  you  can 
adjust using RF signal in 216 Gray pattern.
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SCREW WORKING GUIDE
• FAB31339402
(M3*L4.5, BK, Machine)
• 14EA
• FAB31339201
(M3*L10, BK, Taptite)
• 8EA
• FAB30016122 
(M4*L20, BK, Taptite)
• 4EA
D
D
D
D
D
D
D
D
D
D
D
D
■ Screw specification and application situation
C
C
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
A
B
B
C
C
C
C
C
C
C
C
C
C
C
C
C
C
• FAB30078812 
(M6*L10, BK, Machine)
4EA
B
B
B
B
B
B
A
A
A
A
A
C
Warning
Check Screw Type When Screw is assembled 
at       Part.  If       Screw is used at the      part
Module will get damaged
A
A
C
Warning
Check Screw Type When Screw is assembled 
at       Part.  If       Screw is used at the      part
Module will get damaged
A

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