DOWNLOAD LG 50PB2DR-AC (CHASSIS:PB61C) Service Manual ↓ Size: 23.48 MB | Pages: 76 in PDF or view online for FREE

- 13 -

This is a adjustment to reduce the color difference of video
signal Main/Sub Display.

Service R/C, MSPG-925 Pattern Generator.
(It’s available to output the Color Bar Pattern of the NTSC,PAL)

1) Select AV1 as the input with 100% 8 Color Bar Pattern

in PAL mode and select ‘AV1’ on screen. 

2) After receiving signal for at least 1 second, press the

ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘4. uPD PAL AV(Main&Sub)-Set’.
Pressing the Vol+ Key to adjust the uPD PAL.  

3) When the adjustment is over, 'PAL-AV uPD ADC

Success’ is displayed. If the adjustment has errors,
'Video Configuration Error’ is displayed.

4) Readjust after confirming the case Pattern or adjustment

condition where the adjustment had errors. 

5) After adjustment is complete, exit the adjustment mode

by  pressing the ADJ KEY.

1) Select AV1 as the input with 100% 8 Color Bar Pattern

in NTSC mode and select ‘AV1’ on screen. 

2) After receiving signal for at least 1 second, press the

ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘5. uPD NTSC AV(Main&Sub)-Set’.
Pressing the Vol+ Key to adjust the uPD NTSC.  

3) When the adjustment is over, 'NTSC-AV uPD ADC

Success’ is displayed. If the adjustment has errors,
'Video Configuration Error’ is displayed.

4) Readjust after confirming the case Pattern or adjustment

condition where the adjustment had errors. 

5) After adjustment is complete, exit the adjustment mode

by  pressing the ADJ KEY.

1) Input the PAL signal to Set antenna terminal, and select

input mode in ANALOG, and than verify if RF image
appears on screen.

2) After receiving signal for at least 1 second, press the

ADJ Key on the Service R/C to enter the ‘Ez - Adjust’
and select the ‘5. uPD NTSC AV(Main&Sub)-Set’.
Pressing the Vol+ Key to adjust the uPD NTSC.  

3) When the uPD RF adjustment is over, appears a

massage as

‘AUS RF uPD ADC Success’. If uPD RF

adjustment has errors, can appear 2 kinds of message,
if appears 

‘Check the signal status’, it means the

signal is not connected correctly, and verify if the signal
is connected correctly to the terminal of Set antenna. If
appears 

‘Video Configuration Error’, it means the

signal is connected correctly but the adjustment process
was wrong.

4) Readjust after confirming the case Pattern or adjustment

condition where the adjustment had errors. 

5) After adjustment is complete, exit the adjustment mode

by  pressing the ADJ KEY.

(Va, Vs Voltage Adjustment)

D.M.M 1EA

Refer to Fig.5

Adjustment Method for Power Board( P/No: 6709900020B)

1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P805, connect

- terminal to GND pin of P805.

3) After turning VR901, voltage of D.M.M adjustment as

same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)

1) Connect + terminal of D.M.M to Vs pin of 805, connect –

terminal to GND pin of P805.

2) After turning VR951, voltage of D.M.M adjustment as

same as Va voltage which on label of panel right/top.
(Deviation; ±0.5V)This is the function that enables “Plug
and Play".

1) Connect + terminal of D.M.M to Vs pin of 803, connect –

terminal to GND pin of P803.

2) Move UR221 to set the voltage value of D.M.M between

3.36V and 3.4V.

(Fig. 3) Adjust Pattern :100% 8 Color Bar Pattern

Each PCB Assy must be checked by Check JIG Set before
assembly. (Especially, be careful Power PCB Assy which can
cause Damage to the PDP Module.)

(Fig. 5) Connection Diagram of Power Adjustment for Measuring

- 14 -

8. EDID(The Extended Display 

(1) PC, Jig for adjusting DDC.

(PC serial to D-sub  Connection equipment)

(2) DVI to HDMI Connector.

<EDID Checksum >

- 50PB2DR-AC

HDMI PORT1 : 61   45
HDMI PORT2 : E6  18
RGB : DB

(1) HDMI/DVI Port1 EDID DATA.

(2) HDMI Port2 EDID DATA.

(3) RGB EDID DATA.

(1) As above Fig. 6, Connect the Set, EDID Download Jig, PC

& Cable.

(2) Turn on the PC & EDID Download Jig. And Execute the

S/W : EDID TESTER Ver,2.5.

(3) Set up S/W option.

PC

JIG

PDP

SET

61

61

45

45

DB

E6

E6

18

18

D-sub to D-sub

DVI-D to HDMI

- 15 -

(1) Init the data.

(2) Load the EDID data.(Open File)

(3) Press the “Write Data & Verify”button. and input the data.

(4) If the writing is finished, you will see the “OK” message.

(1) Color analyzer : CA-100+ (CH10) or CA-100 (CH10) 

: When adjust the color temperature of Plasma, the Color
analyzer (CA-100+, CA-100) must use channel 10 that is
adjusted in Matrix adjusted by CS-1000 (White, Red,
Green, Blue adjusted) and adjust according to white
balance coordinates as below. 

(2) Automatic adjustor (with automatic adjustment hour

necessity and the RS-232C communication being possible)

(Automatic Adjustment)

(1) Connection Diagram

: Adjusted W/B using inside Pattern. When connecting to
Auto-controller, or pressing R/C ADJ to enter to Ez Adjust
8.White-Balance appears the Pattern automatically.

(2) Condition for automatic adjustment and attentions

1) Apply the adjustment where the illuminance is less than

10 lux, it means in a place controlled in maximum the
indraft of light.

2) Adjust/measure with the Color Analyzer ( CA-100+, CA-

100 ) contacting completely in the surface of Module.

(3) Aging time

1) After Aging start, make Heat-run more than 15 min. (in

power on status)

2) In case of PDP, maintain Full white Pattern using

internal pattern.

(4)  Process of automatic adjustment

1) As using the white pattern for adjustment the inner part,

HDMI connection need not. But as lower part, the RS-

232C Command is used.

Wb 00 00  Automatic adjustment of white balance start. 
Wb 00 10  The start of gain adjustment.(inside pattern)
Ja   00  ff   Adjustment Date.
Jb   00 c0
...
Wb 00 1f   The end of gain adjustment.

As occasion demands , adjust the offset.

( Wb 00 20(Start) , Wb 00 2f(end))

Wb 00 ff    Automatic adjustment of white balance end.

(Disappear the inside pattern)

[

[

Caution)

(Automatic Adjustment)

(Automatic Adjustment)

(1) Color analyzer : CA-100+ (CH10) or CA-100 (CH10) 

: When adjust the color temperature of Plasma, the Color
analyzer (CA-100+, CA-100) must use channel 10 that is
adjusted in Matrix adjusted by CS-1000 (White, Red,
Green, Blue adjusted) and adjust according to white
balance coordinates as below. 

(Inside Pattern)

<Fig. 6>  Connection Diagram of Automatic Adjustment

R Gain

G Gain

B Gain

R Offset

G Offset

B Offset

CENTER

(DEFAULT)(Hex)

00

00

00

C0

C0

C0

Min

Max

(Hex)

40

40

40

Cool

40

40

40

Mid

40

40

40

Warm

RS-232C COMMAND

[CMD ID DATA]

Jg

Jh

Ji

Cool

Ja

Jb

Jc

Mid

Jd

Je

Jf

Warm

- 16 -

(Passivity Adjustment)

(1) Enter to ‘EZ-ADJUST’ by pressing ADJ key of R/C.
(2) HEAT RUN at least 30 minutes by pressing the ‘11. TEST

Pattern’ on the Service Remote Control and adjust.

(3) Set CA-100+ (CH 10) OR CA-100 (CH 10) in Zero

Calibration, when adjust PDP module make it contacting
completely in the surface.

(4) Select ‘8. White-Balance’ of ‘Ez - Adjust’ by pressing the

ADJ KEY on the Service R/C. Then enter adjustment mode
by pressing the Right KEY (G). This time white pattern is
displayed. (When press  Gkey, the screen enters to Full
White internal pattern.)

(5) The adjustment completes in three color temperatures as

Cool, Medium, and Warm. ( R/G/B OFFSET=64 fix)
1) When R GAIN is fixed at 192:

keep G GAIN and B GAIN less than 192 and find proper
values for adjustment.

2) When G GAIN is fixed at 192:

keep R GAIN and B GAIN less than 192 and find proper
values for adjustment.

3) When B GAIN is fixed at 192:

keep R GAIN and G GAIN less than 192 and find proper
values for adjustment.

(6) Adjust using Volume +/- KEY.

Value of bright : High Level -> 216gray
[Cool]

Color coordinates : X; 0.277 ± 0.002 Y; 0.281 ± 0.002
Color temperature : 11000°K      uv: 0.000

Color coordinates : X; 0.286 ± 0.002 Y; 0.291 ± 0.002
Color temperature : 9300°K      uv: 0.000

Color coordinates : X; 0.315 ± 0.002 Y; 0.322 ± 0.002
Color temperature: 6500°K      uv: 0.000

(7) Move the the Ez-Adjust screen by pressing the  

V

KEY

and exit the adjustment mode by  pressing the ADJ KEY.

[Ref.] White Balance Adjustment Pixel and Color Temperature

(1) When CS-1000 is available:

(2)CA-210 indication value (CH 10)

(3)CA-100/100+ indication value (CH 10)

- How to Use RS-232C to Download S/W via Serial port.

(1) Use DTV Lab.

(1) Click “Set Property” and set the values as shown in the

following picture.

(2) Set Com Port to Serial Port and Baud Rate to 115200.
(3) Press OK to exit the Configuration.
(4) Connect PC and DTV via Serial Port and turn on the TV.
(5)  Press “Connect”. The button will change to “Disconnect.”

Put cursor on the DTV Lab window and press Keyboard to
see the input appear in the window. If it works, the DTV is
successfully connected to computer.

COOL

MIDIUM

WARM

T=11000K,     uv: 0.000

T=  9300K,     uv: 0.000

T=  6500K,     uv: 0.000

x=0.276 y=0.283

x=0.285 y=0.293

x=0.314 y=0.324

Color Temperature

Color Coordinate

Color Temperature

Color Coordinate

Measuring instrument

x

y 

0.283±0.002

0.293±0.002

0.324±0.002

0.276±0.002

0.285±0.002

0.314±0.002

COOL

MIDIUM

WARM

11000°K,     uv: 0.000

9300°K,     uv: 0.000

6500°K,     uv: 0.000

Color Temperature

Color Coordinate

Measuring instrument

x

y 

0.283±0.002

0.293±0.002

0.324±0.002

0.276±0.002

0.285±0.002

0.314±0.002

COOL

MIDIUM

WARM

11000°K,     uv: 0.000

9300°K,     uv: 0.000

6500°K,     uv: 0.000

[ 50X3, 40%filter ]

Color Temperature

Color Coordinate

Measuring instrument

x

y 

0.281±0.002

0.291±0.002

0.322±0.002

0.276±0.002

0.285±0.002

0.314±0.002

COOL

MIDIUM

WARM

11000°K,     uv: 0.000

9300°K,     uv: 0.000

6500°K,     uv: 0.000

[ 50X4, 41%filter ]