LG RF-20CC20M, Service Manual

Page: 11 / 27

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O
AGC Adjustment (SERVICE 1)
1) Connect RF signal (70dB
!
0.2dB) and turn on the TV.
¡
Standard adjustment Channel
- EU 05 Ch. (f
rf
= 175.25MHz)
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(
V
) button to memorize the data.
O
FOCUS Adjustment
1) Tune the TV set to receive a PAL 05CH.
2) Adjust the Focus Volume of FBT for best focus.
O Screen Voltage Adjustment
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)
.
O
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(
V
) 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)
7) Press the OK(
V
) button to memorize the data.
Test Point : AGC TP (C101)
Adjust : Remote Controller
Tuner P/N
Marker
AGC Voltage
6700VPF009G
LG Innotek(W/S TUNER)
2.7
!
0.05V
6700VPF016A
DAEWOO(W/S TUNER)
2.7
!
0.05V
Tuner P/N
Marker
AGC Voltage
6700VPF009S
LG Innotek(TBS TUNER)
2.5
!
0.05V
Test Point : Observing Display
Adjust : Focus Volume of FBT
Test Point : RK (Red Cathode of CPT Board)
Adjust : Screen Volume of FBT
Horizontal
FlyBack Time
Black level
White level
GND for dc
140Vp-p
Status
RG
GG
BG
BLO-R
BLO-G
Initial Data
31
31
31
31
31
Remark
0
1
2
3
0
1
2
3
0
1
0
1
2
0
1
2
3
0
0
1
0
1
OSD-L
(E-ASIA)
OSD-L
(CH+HI)
English
English,Deutsch,Francais,Italiano,Espanol
English,Nederlands,Svenska,Dansk,Suomi,Por
tugues,Romaneste,Polski,Cesky,Pyccknn
English,Romaneste,Polski,Cesky,Pyccknn,Magyar
English
English,Arab,,Urdu,French
English,Parsi,Urdu,French
English,French,Arab,Urdu,Parsi
English
English,Malay,Vietnam,Indonesian,Thai
English
English,Chinese
English,Hindi
TXT-L
(EU)
TXT-L
(E-ASIA)
TXT-L
(ARAB)
TXT-L
(FARSI)
OSD-L
(EU)
OSD-L
(M-
ASIA)
Option Code Function Remark
ENG. ONLY
EU-7EA
EU ALL
EU EAST
ENG. ONLY
ARABIC
PARSI
ARAB,FARSI,URDE
ENG.ONLY
ASIA-ALL
ENG.ONLY
E+CHINA
E+HINDI
W-EU
E-EU
CYRILLIC
UKRAINIAN
WEST-EU
WEST-EU
ARABIC
WEST-EU
FARSI
14”
DC 130V
!
3 V
OTHERS
DC 140V
!
3 V