50PN4503-ZA, 50PN450B-ZA (CHASSIS:PD31A) - LG TV Service Manual (repair manual). Page 8

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4. Total Assembly line process
4.1. POWER PCB Assy voltage adjustment
          (Vs voltage adjustment)
4.1.1.Test equipment : D.M.M 1EA
4.1.2. Condition for adjustment
- No signal with the snow noise in RF mode
4.1.3. Connection Diagram for Measuring 
         : refer to fig.7
4.1.4. Adjustment method
 
4.1.4.1 Vs adjustment
(1)  Connect + terminal of D. M..M. to Vs TP, connect -terminal 
to GND.
(2)  After turning VR901, voltage of D.M.M adjustment as same 
as Vs voltage which on label of panel right/top  ( deviation 
; ±0.5V)
4.1.4.2 Va adjustment
(1)  Connect + terminal of D. M..M. to Va TP, connect -terminal 
to GND.
(2)  After turning VR502, voltage of D.M.M adjustment as same 
as Va voltage which on label of panel right/top  ( deviation 
; ±0.5V)
4.2. Adjustment Preparation
● Required Equipment
-  Remote controller for adjustment 
-  Color Analyzer ( CS-1000, CA-100,100+,CA-210 or same 
product : CH 11 (PDP) 
*  Please adjust CA-210, CA-100+ by CS-1000 before measur-
ing
-  Auto W/B adjustment instrument(only for Auto adjust-
ment)
-  9 Pin D-Sub Jack(RS232C) is connected to the AUTO 
W/B EQUIPMENT.
Before Adjust of White Balance, Please press 
POWER ONLY key
- Adjust Process will start by execute RS232C Command.
● Color temperature standards according to CSM and Module 
●  CS-1000/CA-100+/CA-210(CH 10) White balance adjust-
ment coordinates and color temperature.
*  Connecting picture of the measuring instrument (On Auto-
matic control)
-  Inside PATTERN is used when W/B is controlled. Con-
nect to auto controller or push Adjustment R/C POWER-
ON  ->  Enter the mode of White-Balance, the pattern will 
come out.
CSM
PLASMA
Cool
11000K
Medium
9300K
Warm
6500K
CSM
Color Coordination
Temp
± Color
Coordination
x
y
COOL
0.276 
0.283 
11000K
0.002
MEDIUM
0.285
0.293 
9300K
0.002
WARM
0.313 
0.329 
6500K
0.002
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