42PC1DV-AA (CHASSIS:PB61A) - LG TV Service Manual (repair manual). Page 7

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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  ‘3.  uPD  PAL(Main&Sub)-Set’.  Pressing
the Vol+ Key to adjust the uPD PAL.  

3)  When  the  adjustment  is  over,  'uPD64015  PAL  Main

Adjustment  OK’  and  ‘uPD64015  PAL  Sub  Adjustment
OK’  is  displayed.  If  the  adjustment  has  errors,
'uPD64015  PAL  Main  Error!’  or  'uPD64015  PAL  Main
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 ‘4. uPD NTSC(Main&Sub)-Set’. Pressing
the Vol+ Key to adjust the uPD NTSC.  

3)  When  the  adjustment  is  over,  'uPD64015  NTSC  Main

Adjustment OK’ and ‘uPD64015 NTSC Sub Adjustment
OK’  is  displayed.  If  the  adjustment  has  errors,
'uPD64015  NTSC  Main  Error!’  or  'uPD64015  NTSC
Main 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.

(Va, Vs Voltage Adjustment)

D.M.M 1EA

Refer to Fig.5

Adjustment Method for Power Board( P/No: 6709900019A)

1) After receiving 100% Full White Pattern, HEAT RUN.
2) Connect + terminal of D.M.M to Va pin of P812, connect

- terminal to GND pin of P812.

3)  After  turning  VR0901,  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 P812, connect

– terminal to GND pin of P812.

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)

(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.)

1

1

1

Vs ADJ

VR951

Va ADJ

VR901

GND

Va

5V

Vs

GND

P821

GND

5V

P822

P811

P812

1

1

1

Vs ADJ

VR951

Va ADJ

VR901

GND

Va

5V

Vs

GND

P821

GND

5V

P822

P811

P812

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