LG CE Series User manual

P/No : 3854VA0076A-S1
2000.09.09
Service Sheet Of MC-00AA

- 10 -
¡Safety Precautions
1. It is safe to adjust after using insulating transformer
between the power supply line and chassis input to
prevent the risk of electric shock and protect the
instrument.
2. Never disconnect leads while the TV receiver is on.
3. Don't short any portion of circuits while power is on.
4. The adjustment must be done by the correct appliances.
But this is changeable in view of productivity.
5. Unless otherwise noted, set the line voltage to 230Vac¡
10%, 50Hz.
6. The adjustment of TV should be performed afther warming
up for 15 minutes.
¡Test Equipment required
1. Multimeter (volt meter)
2. Oscilloscope
3. 10:1 PROBE
4. Color Analyzer
¡ RF AGC (Automatic Gain Control) Adjustment
The RF AGC was aligned at the time of manufacture for
optimum performance over a wide range conditions.
Readjustment of RF AGC should not be necessary unless
unusual local conditions exist, such as ;
1) Channel interference in a CATV system.
2) Picture bending and/or color beats, which are unusually
due to excessive RF signal input when the receiver is too
close to a transmitting tower or when the receiver is
connected to an antenna distribution system where the RF
signal has been amplified. In this case, the input signal
should be attenuated (with pad or filter) to a satisfactory
level.
3) Picture noise caused by "broadcast noise" or weak signal.
If the broadcast is "clean" and the RF signal is at least
1mV (60dBu), the picture will be noise free in any area.
Adjusting RF AGC to one end of rotation will usually cause a
relatively poor signal to noise ratio;
Adjusting to the other end of rotation will usually cause a
degradation of over load capabilities resulting in color beats or
adjacent channel interference.
¡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 STANDARD
Picture(PAL I model: 41CH).
4) Adjust Screen Volume of FBT so that the waveform is the
same as below figure (DC 140¡ 3V).
¡Focus Adjustment
1) Tune the TV set to receive a PAL 05CH.
2) Adjust the Focus Volume of FBT for best focus of A.
3) Repeat above step 2) for best overall focus.
Adjustment
1. Connect RF signal (65dB¡0.2dB) and turn on the TV.
¡Standard adjustment Channel
- EU 05 Ch. (frf = 175.25MHz) : CE,CL,CF,CT
- EU 41 Ch. (frf = 631.25MHz) : CI
2. Press OK buttons on TV set and Remote Controller at the
same time to get into SVC-0 mode.
3. Press Channel UP/DOWN button on the Remote Controller
several times to find AGC??.
4. Press Volume UP/DOWN button until the AGC Voltage is
the same as the Table below.
5. Press OK(¡Æ) button to memorize the data.
Test Point : AGC TP (J10)
Adjust : Remote Control 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
Model
System
Tuner P/N
Marker
AGC Voltage
CE-
B/G,D/K,I
6700VPF005D
LG Innotek
2.5¡0.05V
CL-
B/G,LL'
6700VPF005D
LG Innotek
2.5¡0.05V
Test Point : Observing Display
Adjust : Focus Volume of FBT
ADJUSTMENT
The waveform of Screen Voltage
Model
System
Tuner P/N
Marker
AGC Voltage
CF-
B/G,D/K,I
6700VPF009G(W/O TBS)
6700VPV002B(W/TBS)
LG Innotek
2.5¡0.05V
CT-
B/G,D/K,I,M
6700VPF009G(W/O TBS)
6700VPV002B(W/TBS)
LG Innotek
2.5¡0.05V

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¡White Balance Adjustment.(LINE SVC-1)
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 for GG031.
6)
Adjust VOL+ or VOL-button in each status of "Rg--"/"Bg--" for
X=293¡8, Y=295¡8 with color analyzer.
7) Press OK
(¡Æ) button to memorize the adjustment data.
¡Deflection Data Adjustment (Line SVC-2)
NOTE: To enter SVC mode, press "OK" buttons on both TV set
and the Remote control at the same time.
1. Preparation for Deflection Adjustment
1) At SVC mode, press the Yellow colored button.
If the Remote Controller doesn't have the Yellow button, you
should use a Service Remote Control and press SVC button.
And then, deflection data adjustment OSD (SVC1 mode) will
be displayed.
2) Press Channel UP/DOWN button for desirous function
Adjustment.
3) Press Volume UP/DOWN button to adjust the data.
2. Deflection Adjustment Procedure
VL (Vertical Linearity)
Adjust so that the boundary line between upper and lower half
is in accord with geometric horizontal center of the CPT.
VA (Vertical Amplitude)
Adjust so that the circle of a digital circle pattern may be
located within the effective screen of the CPT.
SC (Vertical “S” Correction)
Adjust so that all distance between each horizontal lines are
to be the same.
VS (Vertical Shift)
Adjust so that the horizontal center line of a digital circle
pattern is in accord with geometric horizontal center of the
CPT.
HS (Horizontal Shift)
Adjust so that the vertical center line of a digital circle pattern
is in accord with geometric vertical center of the CPT.
Press OK(¡Æ) button to memorize the data.
3. Deflection Initial Setup Data
¡LINE SVC-3 Adjustment
¡PSM Data
Status
RG
GG
BG
Initial Data
28
31
25
RemarkAdjustment
R-Drive
G-Drive
B-Drive
ITEM
FP(FM Mono Sound Prescale)
NP(NICAM Prescale)
SP(Scart Audio Input Prescale, AV1)
S1 VOL
S2 COL
Data
20
80
17
93
93
VL
VA
VS
HS
SC
41
10
35
35
11
Status Default 21" SEB 20" SEB
A
CONTRAST
BRIGHTNESS
COLOUR
SHARPNESS
100
55
70
60
Adjust
Data
PSM Mode
90
50
50
50
60
50
50
50
STANDARD
MILD
DYNAMIC
50
60
60
30
80
60
50
50
GAME USER

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¡OPTION Adjustment (SVC MODE:OPTION-1,
OPTION-2)
NOTE: When the EEPROM has been replaced, the Option data
should be restored as the function of individual system
and specification.
1) Press OK buttons on both TV set and Remote Controller at
the same time to get into SVC mode.
2) Press the Yellow button several times to find OPTION-1 or
OPTION-2.
3) Input the correspond OPTION data referring to Table below
with the numeric buttons.
Table 1. OPTION 1 Function
Table 2. OPTION 2 Function
Table 3. OPTION 3
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
1
for BUYER'S
request
W/O TXT
Swiss,Austria,
Poland,Dutch
ACMS
TBS
TURBO
EYE
TEXT
TOP
GAME
AV2
Option Code Function Remark
W/O AV2
WITH AV2
W/O GAME
WITH GAME
TOP OFF
TOP ON
W/O TEXT
WITH TEXT
W/O ACMS
WITH ACMS
W/O LNA
WITH LNA
W/O EYE
WITH EYE
TURBO SEARCH OFF
TURBO SEARCH ON
0
1
2
3
4
5
0
1
2
3
4
5
6
7
8
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
128
50
TEXT
LANG
SYS
HOTEL 0
1
HOTEL OFF
HOTEL ON
ITEM DATA Remark
BG/L
BG/I/DK
BG/I/DK/M
BG ONLY
BG DUAL
I ONLY
ENG ONLY
EU-5EA
EU ETC
FARSI
ARAB URDU
E + INDIA
E+I+M+V
E+THAI
E+CHINA
WEST EU
EAST EU1
TURKEY EU
EAST EU2
CYRILLTC1
CYRILLTC2
CYRILLTC3
TURK GRE1
TURK GRE2
TURK GRE3
ARAB FRA
ARAB ENG
ARAB HEB1
ARAB HEB2
FARSI ENG
FARSI FRA
FARSI ALL
HOTEL TV MAX.VOL Limit
0
1
0
1
0
1
0
1
0
1
0
1
A2 ST
MONO
TBS ON
M-VOL
I/II SV
CH + AU
4 KEY
200 PRO
Option Code Function Remark
W/O 200 PRO
WITH 200 PRO
6/8 KEY
4 KEY
CH + AU OFF
CH + AU ON
DUAL SAVE OFF
DUAL SAVE ON
MONO
A2 & NICAM
MONO
0
1
0
1
VOL CURVE
T P/S
VOL
Option Code Function Remark
EUROPE STANDARD
TURBO P/S OFF
TURBO P/S ON