Focus Adjustment; Screen Voltage Adjustment - LG RT-21FB20R Service Manual

Option Code Function
0
ENG. ONLY
1 EU-7EA
OSD-L
(EU)
2 EU ALL
3 EU EAST
0 ENG. ONLY
OSD-L
1
ARABIC
(M-
2 PARSI
ASIA)
3 ARAB,FARSI,URDE
0
ENG.ONLY
OSD-L
(E-ASIA)
1 ASIA-ALL
0 ENG.ONLY
OSD-L
1
E+CHINA
(CH+HI)
2
E+HINDI
0 W-EU
1
TXT-L E-EU
(EU)
2
CYRILLIC
3 UKRAINIAN
0
WEST-EU
TXT-L
(E-ASIA)
TXT-L 0 WEST-EU
(ARAB)
1 ARABIC
TXT-L 0
WEST-EU
(FARSI)
1 FARSI
¡ AGC Adjustment (SERVICE 1)
Test Point : AGC TP (C101)
Adjust : Remote Controller
1) Connect RF signal (70dB¡ 0.2dB) and turn on the TV.
¡ Standard adjustment Channel
- EU 05 Ch. (f = 175.25MHz)
rf
2) Press the OK buttons on TV set and Remote Controller at the
same time to get into SVC-0 mode.
3) Press the Channel UP/DOWN button on the Remote
Controller several times to find AGC??.
4) Press the Volume UP/DOWN button until the AGC Voltage is
the same as the Table below.
5) Press the OK(¡Æ ) button to memorize the data.
Tuner P/N 6700VPF009G
Marker LG Innotek(W/S TUNER)
2.7¡ 0.05V
AGC Voltage
Tuner P/N 6700VPF009S
LG Innotek(TBS TUNER)
Marker
AGC Voltage 2.5¡ 0.05V
Remark
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6700VPF016A
DAEWOO(W/S TUNER)
2.7¡ 0.05V
¡ FOCUS Adjustment
Test Point
Adjust
1) Tune the TV set to receive a PAL 05CH.
2) Adjust the Focus Volume of FBT for best focus.
¡ Screen Voltage Adjustment
Test Point
Adjust
1) Connect the probe of oscilloscope to the RK (Red Cathode)
of CPT Board.
2) Set the oscilloscope to 50V/div and 20Us/div and after
putting GND line upon the lowest grid line of the scope by
pressing GND button,enter into DC mode.
3) Tune the TV set to receive a PAL-B/G 05CH.
4) Adjust Screen Volume of FBT so that the waveform is the
same as below figure (DC 140¡ 3V).
14"
DC 130V¡ 3 V
¡ White Balance Adjustment.(LINE SVC-0)
NOTE : This adjustment should be performed after screen voltage
adjustment.
1) Tune the TV set to receive an 100% white pattern.
2) Press OK(¡Æ ) buttons on TV set and remote controller at the
same time to get into SVC mode.
3) Press Yellow button on remote controller. (Standard mode)
4) Press Channel UP/DOWN button for desirous function
adjustment.
5) Adjust VOL+ or VOL-button in each status of "RG--"/"BG--" for
X=272¡ 8, Y=288¡ 8 with color analyzer.(Europe Model
X=288¡ 8, Y=295¡ X=272¡ 8, 11,000K)
Status
RG
GG
BG
BLO-R
BLO-G
7) Press the OK(¡Æ ) button to memorize the data.
- 12 -
: RK (Red Cathode of CPT Board)
: Screen Volume of FBT
: Observing Display
: Focus Volume of FBT
OTHERS
DC 140V¡ 3 V
Initial Data
31
31
31
31
31
:
Remark