Service Manuals, User Guides, Schematic Diagrams or docs for : LG TV CF-20D33E 84aadj
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ADJUSTMENT
Y Safety Precautions
1. It is safe to adjust after using insulating transformer
between the power supply line and chassis input to TUNER 6700VPF002A(ALPS) 6700VPF003B(LGEC)
prevent the risk of electric shock and protect the AGC Voltage 3.5 ! 0.1V 2.7 ! 0.1V
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. : Screen Voltage Adjustment
5. Unless otherwise noted, set the line voltage to
230Vac!10%, 50Hz. Test Point : RK (Red Cathode of CPT Board)
Adjust : Screen Control of FBT
Y Test Equipment required
1. RF signal generator (with pattern generator)
2. DC Power Supply 1) Tune the TV set to receive a digital pattern.
3. Multimeter (volt meter) 2) Press PSM (RED) button on remote controller. (standard
4. Oscilloscope picture)
5. Color analyzer 3) Connect the probe of oscilloscope to the RK (Red
Cathode) of CPT Board.
4) Adjust Screen Volume of FBT so that the waveform is the
same as below figure.
: RF AGC (Automatic Gain Control) Adjustment
Horizontal
Test Point : AGC TP (J2) FlyBack Time
Black level
Adjust : Remote Control
140Vp-p
The RF AGC was aligned at the time of manufacture for
optimum performance over a wide range conditions. White level
Readjustment of RF AGC should not be necessary unless GND for dc
unusual local conditions exist, such as ;
The waveform of RK(Red Cathode) of CPT Board
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 : Focus Adjustment
signal has been amplified. In this case, the input signal
should be attenuated (with pad or filter) to a satisfactory NOTE: This adjustment should be performed after warming
level. up for 10 minutes.
3) Picture noise caused by "broadcast noise" or weak signal.
If the broadcast is "clean" and the RF signal is at least Test Point : Observing Display
1mV (60dBu), the picture will be noise free in any area. Adjust : Focus control of FBT
Adjusting RF AGC to one end of rotation will usually cause a
relatively poor signal to noise ratio; 1) Tune the TV set to receive an inactive channel station.
Adjusting to the other end of rotation will usually cause a 2) Adjust the Focus control of FBT for best overall focus.
degradation of over load capabilities resulting in color beats or
adjacent channel interference.
Adjustment
1. Connect RF signal (60dB!1dB) and turn on the TV.
2. Press OK buttons on TV set and Remote Controller at the
same time to get into SVC 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(Y) button to memorize the data.
- 1 -
: Deflection Data Adjustment (Line SVC-1) : White Balance Adjustment.(LINE SVC-0)
NOTE: To enter SVC mode, press "OK" buttons on both TV set NOTE : This adjustment should be performed after screen voltage
and the Remote control at the same time. adjustment.
1. Preparation for Deflection Adjustment 1) Tune the TV set to receive an 100% white pattern.
1) At SVC mode, press the Yellow colored button. 2) Press OK(Y) buttons on TV set and remote controller at the
If the Remote Controller doesn't have the Yellow button, you same time to get into SVC mode.
should use a Service Remote Control (105-201G) and press 3) Press Channel UP/DOWN button for desirous function
SVC button. adjustment.
And then, deflection data adjustment OSD (SVC1 mode) will 4) Adjust VOL+ or VOL- button for GG031.
be displayed. 5) Adjust VOL+ or VOL-button in each status of "Rg--"/"Bg--" for
2) Press Channel UP/DOWN button for desirous function X=281!8, Y=288!8 with color analyzer.
Adjustment. 6) Press OK(Y) button to memorize the adjustment data.
3) Press Volume UP/DOWN button to adjust the data.
Status Adjustment Range Initial Data Remark
2. Deflection Adjustment Procedure RG R-Drive 0~63 32
1) Vertical Adjustment
GG G-Drive 0~63 31
Slect VS and adjust until the mechanical center of CPT and
that of screen coincides and select VA and adjust to coincide BG B-Drive 0~63 27
the inner circle of screen with outer frame of CPT.
2) Horizontal Adjustment
Select HS and adjust until the mechanical center of CPT and
that of screen coincides. : Hold Down check
Short J139 and ZD747 and check if the TV set turns into stand-
3) Vertical S Correction Adjustment by.
Select SC and adjust until top-bottom side pincushion are
equal.
4) Press OK(Y) button to memorize the data.
3. Deflection Initial Setup Data
Status Default 21" LG 20" LG 14" LG ORION 14" ORION 16" ORION 20" ORION 21"
VL 34 34 34 34 34 34 34 34
VS 25 25 25 25 25 25 25 25
VA 43 43 43 43 43 43 43 43
HS 36 36 36 36 36 36 36 36
SC 10 10 10 5 5 5 5 5
: Stereo Amp Adjustment(LINE SVC-2)
* Real Stereo Model ONLY
Average ADJ. Data List
FP FM Prescaller 18
NP Nicam Prescaller 72
SP Scart Prescaller 40
SV Scart Volume 55
* INABLE HOTEL TV(LIMIT VOLUME)
MAXVOL 1-100
- 2 -
: 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 OPTION Data SYSTEM SCART EYE UBB AV2
and specification.
20 01 0 1 0 0
1) Press OK buttons on both TV set and Remote Controller at 21 01 0 1 0 1
the same time to get into SVC mode. 22 01 0 1 1 0
2) Press the Yellow button several times to find OPTION-1 or
23 01 0 1 1 1
OPTION-2.
3) Input the correspond OPTION data referring to Table below 24 01 1 0 0 0
with the numeric buttons 0~9. 25 01 1 0 0 1
26 01 1 0 1 0
Table 1. OPTION 1 Function
27 01 1 0 1 1
Option Code Function Remark
28 01 1 1 0 0
00 BG+I+DK W/O RF 3.58(CF-, CZ-)
29 01 1 1 0 1
01 BG+I+DK+M with RF3.58(CT-, CD-)
SYSTEM 30 01 1 1 1 0
10 ONLY Single SYSTEM(CA-)
31 01 1 1 1 1
11 ONLY+DUAL South East Asian DUAL
32 10 0 0 0 0
0 PHONO JACK (AV1)
SCART 33 10 0 0 0 1
1 SCART JACK (AV1) with RGB Input
34 10 0 0 1 0
0 W/O EYE
EYE 35 10 0 0 1 1
1 with EYE
36 10 0 1 0 0
0 W/O UBB UBB for S-MAX(MONO)
UBB 37 10 0 1 0 1
1 with UBB MODEL
38 10 0 1 1 0
0 W/O AV2 (Front) TOOL Option
AV2 39 10 0 1 1 1
1 with AV2 (Front)
40 10 1 0 0 0
41 10 1 0 0 1
Table 2. Specifications for OPTION-1 data 42 10 1 0 1 0
OPTION Data SYSTEM SCART EYE UBB AV2 43 10 1 0 1 1
0 00 0 0 0 0 44 10 1 1 0 0
1 00 0 0 0 1 45 10 1 1 0 1
2 00 0 0 1 0 46 10 1 1 1 0
3 00 0 0 1 1 47 10 1 1 1 1
4 00 0 1 0 0 48 11 0 0 0 0
5 00 0 1 0 1 49 11 0 0 0 1
6 00 0 1 1 0 50 11 0 0 1 0
7 00 0 1 1 1 51 11 0 0 1 1
8 00 1 0 0 0 52 11 0 1 0 0
9 00 1 0 0 1 53 11 0 1 0 1
10 00 1 0 1 0 54 11 0 1 1 0
11 00 1 0 1 1 55 11 0 1 1 1
12 00 1 1 0 0 56 11 1 0 0 0
13 00 1 1 0 1 57 11 1 0 0 1
14 00 1 1 1 0 58 11 1 0 1 0
15 00 1 1 1 1 59 11 1 0 1 1
16 01 0 0 0 0 60 11 1 1 0 0
17 01 0 0 0 1 61 11 1 1 0 1
18 01 0 0 1 0 62 11 1 1 1 0
19 01 0 0 1 1 63 11 1 1 1 1
- 3 -
Table 3. OPTION 2 Function : HOTEL TV Mode
Option Code Function Remark NOTE: This mode is useful for HOTEL TV MODEL. Dealer or
0 Normal Condition Fast Filter IF-PLL HOTEL manager can use this option.
FFI HOTEL TV FUNCTION has two powerful function
1 FFI Active (for excessive RF signal)
0 W/O Chinese NICAM Chinese Model only 1. AFTER SELECTING HOTEL MODE, CAN NOT CHANGE
CHINA
1 Chinese NICAM INITIAL SET UP CONDITION.
- CHANNEL PROGRAM(AUTO PROGRAM, MANUAL
M Multi Language (M=0) Language varies by
LANG. PROGRAM, EDIT FUNCTION) and OSD LANGUAGE set
E English Only (E=1) MICOM Part No. up condition is fixed so the HOTEL lodger cannot change
0 W/O HOTEL for Buyer 's request and remove initial set up data condition at his pleasure.
HOTEL This function prevents HOTEL lodger from needless
1 For HOTEL changing channel memory data and OSD language
0 W/O GAME POWER BALL condition.
GAME
1 With GAME function It will be helpful for maintainning the best suitable
condition of TV SET
2. Limit MAX. VOLUME LEVEL.
- The HOTEL lodger can only use limited range of volume
Table 4. Specifications for OPTION-2 data
level because loud TV sound can disturb other lodger's
OPTION Data FFI CHINA LANG. HOTEL GAME private business.
0 0 0 M 0 0 The HOTEL manager select maximum volume level
proper for HOTEL.
1 0 0 M 0 1
2 0 0 M 1 0 [ HOTEL mode operating guide
3 0 0 M 1 1 1. SET UP(CH.SEARCH AND EDIT) the Channel Program
2. SET UP Proper max volume level in SVC Mode.
4 0 0 E 0 0
3. SET UP HOTEL option in SVC Mode(OPTION-2).
5 0 0 E 0 1
6 0 0 E 1 0
7 0 0 E 1 1
8 0 1 M 0 0
9 0 1 M 0 1
10 0 1 M 1 0
11 0 1 M 1 1
12 0 1 E 0 0
13 0 1 E 0 1
14 0 1 E 1 0
15 0 1 E 1 1
16 1 0 M 0 0
17 1 0 M 0 1
18 1 0 M 1 0
19 1 0 M 1 1
20 1 0 E 0 0
21 1 0 E 0 1
22 1 0 E 1 0
23 1 0 E 1 1
24 1 1 M 0 0
25 1 1 M 0 1
26 1 1 M 1 0
27 1 1 M 1 1
28 1 1 E 0 0
29 1 1 E 0 1
30 1 1 E 1 0
31 1 1 E 1 1
- 4 -
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