Auto Adjustment; Sub-Brightness Adjustment - LG 21FU3RL Service Manual

(3) Static Convergence (STC) Adjustment
1) Receive Cross Hatch Pattern (09CH).
2) Before adjusting Static Convergence(STC),adjust the
focus first seeing to it that the WHITE color picture
quality is sharp enough.
3) Converge the RED vertical line and BLUE vertical line in
unity(same line) by changing the angle between the 2
tabs of 4-pole magnet.
4) Converge the RED horizontal and BLUE horizontal line
unity(same line) by turning the 2 tabs of the 4-pole
magnet. At this time,do not change the angle between
the 2 tabs.
5) Converge the R,G,B vertical line in unity(same line) by
changing the angle between the 2 tabs of the 6-pole
magnet.
6) Converge the R,G,B horizontal line in unity(same line) by
turning the 2 tabs of the 6-pole magnet. At this time, do
not change the angle between the 2 tabs.
(4) Dynamic Convergence (DYC) Adjustment
1) Y-Axis Adjustment : Adjust convergence of Y-axis
2) X-axis Adjustment : Adjust convergence of X-axis
6. White Balance Adjustment
6-1. Necessary Instrument
(1) Auto White Balance Meter (Low/High light Pattern
generator)
(2) CRT Color Analyzer, CA-100 : 1set
(3) Factory Remote Control
6-2. Adjustment Preparation
: Prior to this adjustment, the Screen Voltage adjustment
should be finished.

6-3. Auto Adjustment

(1) Adjust the using Auto White Balance Meter.
(2) Enter CPU OFF mode by press the "IN-START" &"MUTE"
key of factory remote control in turn before adjustment.
Exit CPU OFF mode by press the "MUTE" key of factory
remote control after adjustment finished.
* In case there is excess RED color at screen voltage
adjustment, adjust it using "Volume -(
remote control until the RED color disappear.
6-4. Manual Adjustment
(1) Adjust using white Balance meter and factory remote
controller.
(2) Enter into adjustment mode by pressing the INSTART key
of factory remote control.
D E
(3) Use the CH , CH
F
(4) Use the VOL , VOL
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
(vertical) by moving the deflection
yoke(DY) left and right.
(horizontal) by moving the deflection
yoke(DY) up and down.
G
)"Key of factory
Key to choose adjustment item.
G
Key to change item data.
(5) Adjustment Procedure
1) Make the picture luminance 45Ft-L by change the
"CONTRAST" and "BRIGHTNESS".
2) Adjust X data of high light with R DRIVE and Y data of
high light with B DRIVE to have color temperature as
shown below.
3) Make the picture luminance 4.5Ft-L by change the
"CONTRAST" and "BRIGHTNESS".
4) Adjust X data of low light with R BIAS and Y data of low
light with B BIAS to have color temperature as shown
below.
5) Repeat steps a~d until both low and high light have
same reading as shown below.
MARKET COLOR TEMPERATURE
ALL 13000
7. Focus Voltage Adjustment
This adjustment must be done after operating the TV set
receiver sufficiently.
7-1. Adjustment Preparation
Received the LG standard pattern (PAL : Digital Pattern,
480NC, 13CH, NTSC : Crosshatch pattern, Ch.09 ) and set
the picture condition on "APC ON" (CLEAR) mode.
7-2. Adjustment
Turn the focus volume on the FBT upper direction to have the
best focus vertical line (figure 1.(a)) and horizontal line (figure
1.(b)) as shown below.
[ f igur e 1- PAL]

8. SUB-BRIGHTNESS Adjustment

This adjustment must be done after the White balance
Adjustment.
8-1. Adjustment preparation
(1).NTSC
- Received LG standard Mono scope pattern (CH14).
- Set the picture condition on "APC ON" (CLEAR) mode.
(2). PAL
- Received PAL B/G 5CH pattern.
- Set the picture condition on "PSM ON" (DYNAMIC) mode.
- 6 -
X-AXIS Y-AXIS REMARK
268 ± 5 273 ± 5
( a)
( b)
[ f igure 1 - NTSC]
LGE Internal Use Only