DOWNLOAD LG 50PG70F-UB (CHASSIS:PU82C) Service Manual ↓ Size: 9.59 MB | Pages: 30 in PDF or view online for FREE

- 5 -

This spec sheet is applied all of the PDP TV, PU82C chassis. 

(1) Because this is not a hot chassis, it is not necessary to use

an isolation transformer. However, the use of isolation
transformer will help protect test equipment.

(2) Adjustments must be done in the correct order.
(3) The adjustments must be performed in the circumstance of

25±5°C of temperature and 65±10% of relative humidity if
there is no specific designation.

(4) The input voltage of the receiver be must kept 220V, 60Hz

when adjusting.

(5) The receiver must be operational for about 15 minutes

prior to the adjustments.

1) After receiving 100% white pattern, the receiver must be

operated prior to adjustment. (Or 8. Test Pattern
condition in EZ - Adjust)

2) Enter into White Pattern 

- Press POWER ON Key on the Service Remote

Control (S R/C)

- Enter the Ez - Adjust by pressing ADJ Key on the

Service Remote Control (S R/C).

- Select 10. Test Pattern using the CH +/- Key and

select the White by pressing the direction Key. 
Display the 100% Full White Pattern. 

[

Set is activated HEAT-RUN without signal generator in

this mode.

O

HEAT RUN

Preliminary action is applied to the test for afterimage
discharge detection, and 100% FULL WHITE PATTERN
must be operated automatically.

O

Test for afterimage discharge detection

1) Pressing Power On key

- Only operating by pressing Power On key

2) Full Test Pattern(2 min 30sec) --> Full Black

Pattern(30sec) --> Full White Pattern(maintenance)
- Full White Pattern when the main power is turned on

again after being turned off 

3) Pattern Mode is deselected by pressing CH +/-, Exit Key.

[

Set is activated HEAT-RUN without signal generator in this

mode.

If you turn on a still screen more than 20 minutes (Especially
Digital pattern(13 CH), Cross Hatch Pattern), an afterimage
may occur in the black level part of the screen.

Test Pattern 2min 30sec

Test Pattern 30sec

- 6 -

(Va, Vs Voltage Adjustment)

Adjust the voltages Va and Vs supplied from the PSU to the
module within the specified range of each module to supply
the stable power

(1) D.M.M 1EA
(2) Voltage adjustment bar 

1) Connect + terminal of D.M.M to Va pin of P812 and

connect – terminal  to GND pin of P812.

2) Adjust VR901 voltage to match that of the label on the

Top/Right of the panel. (Deviation : ±0.5V)

1) Connect + terminal of D.M.M to Vs pin of P812 and

connect – terminal  to GND pin of P812.

2) Adjust VR951 voltage to match that of the label on the

Top/Right of the panel. (Deviation : ±0.5V)

1) Connect + terminal of D.M.M to Va pin of P12 and

connect – terminal  to GND pin of P12.

2) Adjust VR951 voltage to match that of the label on the

Top/Right of the panel. (Deviation : ±0.5V)

1) Connect + terminal of D.M.M to Vs pin of P12 and

connect – terminal to GND pin of P12.

2) Adjust VR901 voltage to match that of the label on the

Top/Right of the panel. (Deviation : ±0.5V) 

1) Connect + terminal of D.M.M to Va pin of P812 and

connect – terminal  to GND pin of P812.

2) Adjust VR901 voltage to match that of the label on the

Top/Right of the panel. (Deviation : ±0.5V)

1) Connect + terminal of D.M.M to Vs pin of P812 and

connect – terminal  to GND pin of P812.

2) Adjust VR951 voltage to match that of the label on the

Top/Right of the panel. (Deviation : ±0.5V)

Each PCB assembly must be checked by check JIG set.
(Because power PCB Assembly damages to PDP Module,
especially be careful)

Connection Diagram of Power Adjustment for Measuring

(Power Board): 60”

Connection Diagram of Power Adjustment for Measuring

(Power Board): 50”

Connection Diagram of Power Adjustment for Measuring

(Power Board): 42”(EAY32808901)

- 7 -

Component 480i/1080p RGB 1080p adjustment to set the
black level and the Gain to optimum.

(1) Service R/C
(2) 801GF(802B, 802F, 802R) or MSPG925FA Pattern

Generator (480i/1080p  The Horizontal 100% Color Bar
Pattern adjust to within  0.7±0.1Vp-p)

[

Because the above pattern can differ by the model and

pattern for each device, you must check the pattern first.

(1) Check the connection Component1 to the Test Equipment. 

(MSPG-925FA => Model: 209, Pattern: 65)

(2) Select Component1 as the input with  100% Horizontal

Color Bar Pattern(HozTV31Bar) in 480i Mode and select
‘Normal’ in screen.  

(3) 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 ‘3. ADC 480i Comp1’.
Pressing the Enter Key to adjust automatically.  

(4) When the adjustment is over, 'ADC Component1 Success’

is displayed. 

(5) If the adjustment has errors, 'ADC Component1 480i Fail’

is displayed. And error massage(‘Component1 Not
Connected’ or ‘Not Valid Format’ or ‘Check Signal Status’)
is displayed for 1 second.

(1) Check the connection Component1, RGB to the Test

Equipment (MSPG-925FA => Model: 225, Pattern: 65)

(2) Select Component1 as the input with  100% Horizontal

Color Bar Pattern(HozTV31Bar) in 1080p Mode and select
‘Normal’ in screen.

(3) 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. ADC 1080p Comp1/RGB’.
Pressing the Enter Key to adjust automatically component1.

(4) When the adjustment is over, 'ADC Component1 Success’

is displayed. If the adjustment has errors, 'ADC
Component1 1080p Fail’ is displayed.

(5) After the Component1 adjustment is over, convert the

RGB-DTV Mode and start RGB adjustment. 
When the adjustment is over, 'ADC RGB 1080P Success’
is displayed.

(6) Readjust after confirming the case Pattern or adjustment

condition where the adjustment errors. 
Error massage is ‘Component1 Not Connected’ or ‘Not
Valid Format’ or ‘Check Signal Status’.

(7) After adjustment is complete, exit the adjustment mode by

pressing the ADJ KEY.

5. EDID(The Extended Display 

It is the feature to implement the “Plug and Play” which
automatically reconfigures the user’sl environment to directly
use by exchanging information without any command directly
to the PC or the monitor by the user, which is established by
the VESA

1) PC, Jig for adjusting DDC. (PC serial to D-sub

Connection equipment)

2) S/W for writing DDC(EDID data write & read)
3) D-Sub cable
4) Jig for HDMI Cable connection

1) Set devices as below and turn on the PC and JIG.
2) Open S/W for writing DDC (EDID data write & read).

(operated in DOS mode)

<Fig. 1>  Adjustment Pattern: 480i/1080p 60Hz Pattern

LCD TV SET

(or Digital Board)

- 8 -

:

EDID for HDMI-1 (DDC (Display Data Channel) Data)
EDID table =

:

EDID for HDMI-2 (DDC (Display Data Channel) Data)
EDID table =

:

EDID for HDMI-3 (DDC (Display Data Channel) Data)
EDID table =

:

EDID DATA for RGB
EDID table =