42PC1DV-AA (CHASSIS:PB61A) - LG TV Service Manual (repair manual). Page 6

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These instructions are applied to all of the 42” PLASMA TV,
PB61A 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.  

O

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) After pressing Power Only key(only operating by

pressing Power Only key), Full Test Pattern(2 min
30sec) --> Full Black Pattern(30sec) --> After this state,
Full White Pattern is displayed.
(but you must preset the program for Full White State
when you press the Main Power Off/On) 

2) 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, Cross Hatch Pattern), an afterimage may occur
in the black level part of the screen.

(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.

(1) Test Equipment: PC, Jig for download
(2) Connect the power of VSC B/D.
(3) Execute download program of PC.
(4) After executing the hot key on the Programmer, click icon.
(5) End after confirming.

MST3362M-Set adjustment to set the black level and the Gain
of  optimum  with  an  automatic  movement  from  the  analog  =>
digital converter.

Service R/C, 801GF(802B,802F,802R), 
MSPG-925 Pattern Generator.
(  480i,  1080i  60Hz  Color  Bar  Pattern  output  will  be  possible
and  the  output  level  will  accurately  have  to  be  revised  with
0.7±0.1Vp-p)

1) Select Component1 as the input with Color Bar Pattern

in 480i 60Hz mode and select ‘Component1’ 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 ‘1. ADC 480i Comp1’. Pressing the Vol+
Key to adjust the component1.  

3) When the adjustment is over, 'Component1 Adjustment

OK’  is  displayed.  If  the  adjustment  has  errors,
'Component1  Adjustment  Failed!  Try  Again!’  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  Component2,  RGB-DTV  as  the  input  with  Color

Bar  Pattern  in  1080i  60Hz  mode  and  select
‘Component2’ 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  ‘2.  ADC  1080i  Comp2/RGB’.  Pressing
the Vol+ Key to adjust the component2.  

3) When the adjustment is over, 'Component2 Adjustment

OK’  is  displayed.  If  the  adjustment  has  errors,
'Component2  Adjustment  Failed!  Try  Again!’  is
displayed.  and  If  the  adjustment  has  errors,  'RGB
Adjustment Failed! Try Again!’ 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.

PC

VSC

B/D

JIG cable(CPLD D/L )

<Fig. 1>  Connection Diagram of CPLD Download

(Fig. 2) Adjust Pattern : 480i, 1080i 60Hz Color Bar Pattern