DOWNLOAD LG 50PZ750-UG (CHASSIS:PU12A) Service Manual ↓ Size: 12.92 MB | Pages: 75 in PDF or view online for FREE

(1) 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.

(1) Color Analyzer : CA-210 (NCG: CH 9 / WCG: CH12 /PDP

Module:CH10)

(2) Adj. Computer 

(During auto adj., RS-232C protocol is needed)

(3) Adj. R/C
(4) Video Signal Generator MSPG-925F 720p/216Gray

(Model:217, Pattern:78)

-> Only when internal pattern is not available

- Color Analyzer Matrix should be calibrated using CS-1000

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Protocol

<Command Format>

- LEN: Number of Data Byte to be send
- CMD: Command
- VAL: FOS Data
- CS: Checksum of sent Data
- A: Acknowledge
Ex) [Send: JA_00_DD] / [Ack: A_00_okDDX]

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RS-232C Command used during auto-adj.

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. complete
*(wb 00 20(Start), wb 00 2f(End)) -> Off-set adj.

wb 00 ff   -> End white balance auto-adj.

(1) Set TV in adj. mode using POWER On Key 
(2) Zero  calibrate  probe  then  place  it  on  the  center  of  the

Display

(3) Connect Cable(RS-232C)
(4) Select mode in adj. Program and begin adj.
(5) When  adj.  is  complete  (OK  Sign),  check  adj.  status  per

mode

(Warm, Medium, Cool)

(6) Remove probe and RS-232C cable to complete adj.

- Adj. must begin w/ command “wb 00 00”, and end “wb 00

ff” and adj. offset if needed.

- Offset adjust limit value.

Offset Min = 34 (Decimal)
Offset Max = 94 (Decimal)

Dynamic contrast : off
Dynamic color : off
OPC : Off
Energy saving mode : Off

(1) Set  TV  Picture  Mode  to  Standard  and  in  Advanced

Control, set Dynamic Contrast and Color ‘ Off ’ .

(2) Set TV in adj. mode using POWER On Key
(3) Press ADJ key -> EZ adjust using adj. R/C
(4) Using CH + / - KEY, select 10.TEST PATTERN then press

Enter  to  place  in  HEAT  RUN  mode  and  wait  for  30
minutes.

(4) Zero calibrate the probe of Color Analyzer, then place it on

the center of LCD module within 10 cm of the surface.

(5) Press ADJ key -> 7. White-Balance then press the cursor

to the right (KEY 

G

)

(When 

G

is  pressed  Full  White  internal  pattern  will  be

displayed)

(6) One  of  R  Gain  /  G  Gain  /  B  Gain  should  be  fixed  at  192,

and the rest will be lowered to meet the desired value.

(7) Adj. is performed in COOL, MEDIUM, WARM 3 modes of

color temperature

(8) Offset  Adjust  in  MEDIUM,  WARM  2  modes  of  color

temperature ( Only THX Model )

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If  internal  pattern  is  not  available,  use  HDMI  input.    In  EZ
Adj.  menu  7.White  Balance,  you  can  select  one  of  3
options: None, Inner, HDMI.  Default is inner.  By selecting
HDMI, you can adjust using HDMI signal.

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Adj. condition and cautionary items

(1) Lighting condition in surrounding area

Surrounding  lighting  should  be  lower  than  10  lux.    Try
to isolate adj. area into dark surrounding.

(2) Probe location

- PDP : Color  Analyzer  (CA-100,  CA-100+,  CA210)

probe should be firmly attached to the Module

- LCD : Color Analyzer (CA-210) probe should be within

10cm  and  perpendicular  of  the  module  surface
(80°~ 100°)

- In  case  of  LCD,  B/L  on  should  be  checked  using  no

signal or Full white Pattern

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Standard color coordinate and temperature using CS-1000

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Luminance: Full white 216 Gray

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Standard  color  coordinate  and  temperature  using  CA-210(CH
10)

- Gain color coordinate

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Pattern : Full white 216 Gray

- Offset color coordinate : Only THX model

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Pattern : Full white 50 Gray 

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Luminance : 5 ± 4 cd

(1) Press the EYE Key on the adjustment remote controller.
(2) Check the Sensor DATA ( It must be under 10) and keep

the data longer than 1.5s

(3) Check ‘OK’

(Sensor DATA 0 ~ 4095, Power Saving Mode 0 ~ 12)

* IF you press IN-STAP Button, change Green Eye-check OSD.

* This test is to check Network operation.

(1) Play the LAN Port Test PROGRAM.
(2) Input IP set up for an inspection to Test 

*IP Number : 12.12.2.2

* In this case Network setting is on Manual Setting.
(1) Play the LAN Port Test Program.
(2) connect each other LAN Port Jack.
(3) Play Test (F9) button and confirm OK Message.
(4) remove LAN CABLE

12. Check Wireless function.

(1) Connect  set  and  Dongle  of  Wireless  to  Cable  of  HDMI  &

TTA 20Pin 

(2) At OSD of SET, check the message like Fig 3.
(3) Detach Cable of Wireless Dongle 

- 10 -

Required Equipment
- RF  Remote  Controller  for  test,  IR-KEY-Code  Remote

Controller for test

* You  must  confirm  the  battery  power  of  Remote  Controller

before test

(Recommend that change the battery per every lot) 

(1) If you select the ‘start key(Mute)’ on the controller, you can

pairing with the TV SET.

(2) You can check the cursor on the TV Screen, when select

the ‘OK Key’ on the controller 

(3) You  must  remove  the  pairing  with  the  TV  Set  by  select

‘Vol+(STOP) Key’ on the controller

(Pattern  Generator  MSPG-3233,  HDMI  mode  NO.  371  ,

pattern No. 81)

(1) Please input 3D test pattern like below

(2) Enter 3D mode , then select side by side

(If  you  don’t  wear  a  3D  Glasses,  you  will  see  the  picture
like below)

(3) Put on the 3D Glasses, And block the right side of Glasses 

(LEFT:OPEN[TEST], RIGHT:CLOSED)
And  check  the  middle  sides  of  picture  ,  RED  ->  normal  ,
others -> abnormal

(4) Put on the 3D Glasses, And block the right side of Glasses 

(LEFT:CLOSED, RIGHT:OPEN[TEST])
And  check  the  middle  sides  of  picture  ,  BLUE  ->  normal  ,
others -> abnormal

Required Equipment

- Pattern Generator : 3D-GT002, MSHG-600, 
MSPG-6100 [SUPPORT HDMI1.4])
MODE : HDMI mode NO. 872 
Pattern No.83

(1) On 3D Mode, Check the picture like below.

(2) If  RF  Emitter  is  correctly  working,  you  can  see  that  the

lamp of RF tester turns on.

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Applied  model:  PU02A  Chassis  applied  USA  Model(Not
Canada, Mexico)

(1) Press ADJ key on the Adj. R/C, then select Country Group

Menu

(2) Depending  on  destination,  select  KR  or  US,  then  on  the

lower option, select US, CA, MX.  Selection is done using
+, - KEY

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After final inspection, press In-Stop key of the Adj. R/C and
check that the unit goes to Stand-by mode. 

.

[ Caution ] 
Both Vs and Va voltage adjustment are necessary.

(1) Model name: 50/60PK750-UA, 50/60PK950-UA 
(2) Va/Vs Adjustment Procedure

1) Connect  positive(+)  terminal  of  DMM  to  Vs/Va  pin,

connect negative(-) terminal to GND.

2) Turning  ‘  Vs/Va  ’  and  adjust  Vs/Va  voltages  to  a  value

which is written on a right/top label of a module.

( deviation ; ± 0.5V)

[ Caution ] 
Each  Power  Supply  Unit  PCB  assembly  must  be  checked  by
check JIG set.
(Because power PCB Ass’y damages to PDP Module, especially
be careful)
[Caution]
Set up "RF mode(noise)" before a voltage adjustment.

(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 Low,

it didn’t work.
But  your  downloaded  version  is  High,  USB  data  is
automatically detecting

(3) Show the message “Copying files from memory”

(4) Updating is staring.

(5) Updating Completed, The TV will restart automatically.

(6) If  your  TV  is  turned  on,  check  your  updated  version  and

Tool option. (explain the Tool option, next stage)

* 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, have to adjust TOOL OPTION 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) Completed selecting Tool option.

* After downloading, have to adjust TOOL OPTION 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. Completed selecting Tool option.

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Model  

Tool 

Tool 

Tool 

Tool 

Tool 

Tool 

Name

Value 1 Value 2 Value 3 Value 4 Value 5 Value 6

50PZ950-UA 32777

65

7519

7560

14929

857

60PZ950-UA 32781

65

7519

7560

14921

857

50PZ570-UG 32793

65

7519

7560

14921

857

60PZ570-UG 32797

65

7519

7560

14921

857