LG RT-44NA10T User manual

COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MP-00DA
MODEL : RT-44NA10T
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

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CONTENTS
Contents .......................................................................................................... 2
Safety Precautions ..........................................................................................3
Servicing Precautions .................................................................................... 4
Specifications ................................................................................................. 6
Control Descriptions ...................................................................................... 8
Adjustment......................................................................................................11
Troubleshooting.............................................................................................17
Block Diagram................................................................................................25
Printed Circuit Board.....................................................................................28
Exploded View .............................................................................................. 40
Exploded View Parts List...............................................................................41
Replacement Parts List ................................................................................ 42
SVC. Sheet .........................................................................................................

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SAFETY PRECAUTIONS
Many electrical and mechanical parts in this chassis have special safety-related characteristics. These parts are identified by in
the Schematic Diagram and Replacement Parts List.
It is essential that these special safety parts should be replaced with the same components as recommended in this manual to
prevent X-RADIATION, Shock, Fire, or other Hazards.
Do not modify the original design without permission of manufacturer.
General Guidance
An lsolation Transformer should always be used during
the servicing of a receiver whose chassis is not isolated from
the AC power line. Use a transformer of adequate power rating
as this protects the technician from accidents resulting in
personal injury from electrical shocks.
It will also protect the receiver and it’s components from being
damaged by accidental shorts of the circuitary that may be
inadvertently introduced during the service operation.
If any fuse (or Fusible Resistor) in this TV receiver is blown,
replace it with the specified.
When replacing a high wattage resistor (Oxide Metal Film
Resistor, over 1W), keep the resistor 10mm away from PCB.
Keep wires away from high voltage or high temperature parts.
Due to high vacuum and large surface area of picture tube,
extreme care should be used in handling the Picture Tube.
Do not lift the Picture tube by it’s Neck.
X-RAY Radiation
Warning:
To determine the presence of high voltage, use an accurate
high impedance HV meter.
Adjust brightness, color, contrast controls to minimum.
Measure the high voltage.
The meter reading should indicate
23.5 ±1.5KV: 14-19 inch, 26 ±1.5KV: 19-21 inch,
29.0 ±1.5KV: 25-29 inch, 30.0 ±1.5KV: 32 inch
If the meter indication is out of tolerance, immediate service
and correction is required to prevent the possibility of
premature component failure.
Before returning the receiver to the customer,
always perform an AC leakage current check on the exposed
metallic parts of the cabinet, such as antennas, terminals, etc.,
to be sure the set is safe to operate without damage of
electrical shock.
Leakage Current Cold Check(Antenna Cold Check)
With the instrument AC plug removed from AC source,
connect an electrical jumper across the two AC plug prongs.
Place the AC switch in the on positioin, connect one lead of
ohm-meter to the AC plug prongs tied together and touch other
ohm-meter lead in turn to each exposed metallic parts such as
antenna terminals, phone jacks, etc.
If the exposed metallic part has a return path to the chassis, the
measured resistance should be between 1M‰ and 5.2M‰.
When the exposed metal has no return path to the chassis the
reading must be infinite.
An other abnormality exists that must be corrected before the
receiver is returned to the customer.
Leakage Current Hot Check (See below Figure)
Plug the AC cord directly into the AC outlet.
Do not use a line Isolation Transformer during this check.
Connect 1.5K/10watt resistor in parallel with a 0.15uF capacitor
between a known good earth ground (Water Pipe, Conduit, etc.)
and the exposed metallic parts.
Measure the AC voltage across the resistor using AC
voltmeter with 1000 ohms/volt or more sensitivity.
Reverse plug the AC cord into the AC outlet and repeat AC
voltage measurements for each esposed metallic part. Any
voltage measured must not exceed 0.75 volt RMS which is
corresponds to 0.5mA.
In case any measurement is out of the limits sepcified, there is
possibility of shock hazard and the set must be checked and
repaired before it is returned to the customer.
Leakage Current Hot Check circuit
The source of X-RAY RADIATION in this TV receiver is the
High Voltage Section and the Picture Tube.
For continued X-RAY RADIATION protection, the
replacement tube must be the same type tube as specified in
the Replacement Parts List.
1.5 Kohm/10W
To Instrument's
exposed
METALLIC PARTS
Good Earth Ground
such as WATER PIPE,
CONDUIT etc.
AC Volt-meter
IMPORTANT SAFETY NOTICE
0.15uF

- 4 -
CAUTION: Before servicing receivers covered by this service
manual and its supplements and addenda, read and follow the
SAFETY PRECAUTIONS on page 3 of this publication.
NOTE: If unforeseen circumstances create conflict between the
following servicing precautions and any of the safety
precautions on page 3 of this publication, always follow the
safety precautions. Remember: Safety First.
General Servicing Precautions
1. Always unplug the receiver AC power cord from the AC
power source before;
a. Removing or reinstalling any component, circuit board
module or any other receiver assembly.
b. Disconnecting or reconnecting any receiver electrical plug
or other electrical connection.
c.
Connecting a test substitute in parallel with an electrolytic
capacitor in the receiver.
CAUTION: A wrong part substitution or incorrect
polarity installation of electrolytic capacitors may result
in an explosion hazard.
d. Discharging the picture tube anode.
2. Test high voltage only by measuring it with an appropriate
high voltage meter or other voltage measuring device (DVM,
FETVOM, etc) equipped with a suitable high voltage probe.
Do not test high voltage by "drawing an arc".
3. Discharge the picture tube anode only by (a) first connecting
one end of an insulated clip lead to the degaussing or kine
aquadag grounding system shield at the point where the
picture tube socket ground lead is connected, and then (b)
touch the other end of the insulated clip lead to the picture
tube anode button, using an insulating handle to avoid
personal contact with high voltage.
4. Do not spray chemicals on or near this receiver or any of its
assemblies.
5. Unless specified otherwise in this service manual, clean
electrical contacts only by applying the following mixture to
the contacts with a pipe cleaner, cotton-tipped stick or
comparable nonabrasive applicator; 10% (by volume)
Acetone and 90% (by volume) isopropyl alcohol (90%-99%
strength)
CAUTION: This is a flammable mixture.
Unless specified otherwise in this service manual, lubrication
of contacts in not required.
6. Do not defeat any plug/socket B+ voltage interlocks with
which receivers covered by this service manual might be
equipped.
7. Do not apply AC power to this instrument and/or any of its
electrical assemblies unless all solid-state device heat sinks
are correctly installed.
8. Always connect the test receiver ground lead to the
receiver chassis ground before connecting the test receiver
positive lead.
Always remove the test receiver ground lead last.
9. Use with this receiver only the test fixtures specified in this
service manual.
CAUTION: Do not connect the test fixture ground strap to
any heatsink in this receiver.
Electrostatically Sensitive (ES) Devices
Some semiconductor (solid state) devices can be damaged
easily by static electricity. Such components commonly are
called Electrostatically Sensitive (ES) Devices. Examples of
typical ES devices are integrated circuits and some fieldeffect
transistors and semicounductor "chip" components. The
following techniques should be used to help reduce the
incidence of component damage caused by static by static
electricity.
1. Immediately before handling any semiconductor component
or semiconductor-equipped assembly, drain off any
electostatic charge on your body by touching a known earth
ground. Alternatively, obtain and wear a commercially
available discharging wrist strap device, which should be
removed to prevent potential shock reasons prior to
applying power to the unit under test.
2. After removing an electrical assembly equipped with ES
devices, place the assembly on a conductive surface such as
aluminum foil, to prevent electrostatic charge buildup or
exposure of the assembly.
3. Use only a grounded-tip soldering iron to solder or unsolder
ES devices.
4. Use only an anti-static type solder removal device. Some
solder removal devices not classified as "anti-static" can
generate electrical charges sufficent to demage ES devices.
5. Do not use freon-propelled chemicals. These can generate
electrical charges sufficient to damage ES devices.
6. Do not remove a repalcement ES device from its protective
package until immediately before you are ready to install it.
(Most replacement ES devices are packaged with leads
electrically shorted together by conductive foam, aluminum
foil or comparable conductive material).
7. Immediately before removing the protective material from
the ieads of a replacement ES device, touch the protective
material to the chassis or circuit assembly into which the
device will be installed.
CAUTION:Be sure no power is applied to the chassis or
circuit, and observe all other safety precautions.
8. Minimize bodily motions when handling unpackaged
replacement ES devices. (Otherwise harmless motion such
as the bruching together of your clothes fabric or the lifting
of your foot from a carpeted floor can generate static
electricity sufficient to damage an ES device.)
General Soldering Guidelines
1. Use a grounded-tip, low-wattage soldering iron and
appropriate tip size and shape that will maintan tip
temperature within the range or 500 °F to 600 °F.
2. Use an appropriate gauge of RMA resin-core solder
composed of 60 parts tin/40 parts lead.
3. Keep the soldering iron tip clean and well tinned.
4. Thorohly clean the surfaces to be soldered. Use a mall
wirebristle (0.5 inch, or 1.25cm) brush with a metal handle.
Do not use freon-propelled spray-on cleaners.
5. Use the following unsoldering technique
a. Allow the soldering iron tip to reach normal temperature.
(500 °F to 600 °F)
b. Heat the component lead until the solder melts.
c. Quickly draw the melted solder with an anti-static,
suction-type solder removal device or with solder braid.
CAUTION: Work quickly to avoid overheating the
circuiboard printed foil.
6. Use the following soldering technique.
a. Allow the soldering iron tip to reach a normal
temperature (500°F to 600 °F)
b. First, hold the soldering iron tip and solder the strand
against the component lead until the solder melts.
SERVICING PRECAUTIONS

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c. Qulckly move the soldering iron tip to the junction of the
component lead and the printed circuit foil, and hold it
there only until the solder flows onto and around both the
component lead and the foil.
CAUTION: Work quickly to avoid overheating the circuit
board printed foil.
d. Closely inspect the solder area and remove any excess
or splashed solder with a small wire-bristle brush.
IC Remove/Replacement
Some chassis circuit boards have slotted holes (oblong) through
which the IC leads are inserted and then bent flat against the
circuit foil. When holes are the slotted type, the following
technique should be used to remove and replace the IC. When
working with boards using the familiar round hole, use the
standard technique as outlined in parapraphs 5 and 6 above.
Removal
1. Desolder and straighten each IC lead in one operation by
gently prying up on the lead with the soldering iron tip as the
solder melts.
2. Draw away the melted solder with an anti-static suction-
type solder removal device (or with solder braid) before
removing the IC.
Replacement
1. Carefully insert the replacement IC in the circuit boare.
2. Carefully bend each IC lead against the circuit foil pad and
solder it.
3. Clean the soldered areas with a small wire-bristle brush.
(It is not necessary to reapply acrylic coating to the areas).
"Small-Signal" Discrete Transistor
Removal/Replacement
1. Remove the defective transistor by clipping its leads as
close as possible to the component body.
2. Bend into a "U" shape the end of each of three leads
remaining on the circuit board.
3. Bend into a "U" shape the replacement transistor leads.
4. Connect the replacement transistor leads to the
corresponding leads extending from the circuit board and
crimp the "U" with long nose pliers to insure metal to metal
contact then solder each connection.
Power Output, Transistor Device
Removal/Replacement
1. Heat and remove all solder from around the transistor leads.
2. Remove the heatsink mounting screw (if so equipped).
3. Carefully remove the transistor from the heat sink of the
circuit board.
4. Insert new transistor in the circuit board.
5. Solder each transistor lead, and clip off excess lead.
6. Replace heatsink.
Diode Removal/Replacement
1. Remove defective diode by clipping its leads as close as
possible to diode body.
2. Bend the two remaining leads perpendicula y to the circuit
board.
3. Observing diode polarity, wrap each lead of the new diode
around the corresponding lead on the circuit board.
4. Securely crimp each connection and solder it.
5. Inspect (on the circuit board copper side) the solder joints of
the two "original" leads. If they are not shiny, reheat them
and if necessary, apply additional solder.
Fuse and Conventional Resistor
Removal/Replacement
1. Clip each fuse or resistor lead at top of the circuit board
hollow stake.
2. Securely crimp the leads of replacement component around
notch at stake top.
3. Solder the connections.
CAUTION: Maintain original spacing between the replaced
component and adjacent components and the circuit board
to prevent excessive component temperatures.
Circuit Board Foil Repair
Excessive heat applied to the copper foil of any printed circuit
board will weaken the adhesive that bonds the foil to the circuit
board causing the foil to separate from or "lift-off" the board.
The following guidelines and procedures should be followed
whenever this condition is encountered.
At IC Connections
To repair a defective copper pattern at IC connections use the
following procedure to install a jumper wire on the copper
pattern side of the circuit board. (Use this technique only on IC
connections).
1. Carefully remove the damaged copper pattern with a sharp
knife. (Remove only as much copper as absolutely
necessary).
2. carefully scratch away the solder resist and acrylic coating
(if used) from the end of the remaining copper pattern.
3. Bend a small "U" in one end of a small gauge jumper wire and
carefully crimp it around the IC pin. Solder the IC connection.
4. Route the jumper wire along the path of the out-away
copper pattern and let it overlap the previously scraped end
of the good copper pattern. Solder the overlapped area and
clip off any excess jumper wire.
At Other Connections
Use the following technique to repair the defective copper
pattern at connections other than IC Pins. This technique
involoves the installation of a jumper wire on the component
side of the circuit board.
1. Remove the defective copper pattern with a sharp knife.
Remove at least 1/4 inch of copper, to ensure that a
hazardous condition will not exist if the jumper wire opens.
2. Trace along the copper pattern from both sides of the
pattern break and locate the nearest component that is
directly connected to the affected copper pattern.
3. Connect insulated 20-gauge jumper wire from the lead of
the nearest component on one side of the pattern break to
the lead of the nearest component on the other side.
Carefully crimp and solder the connections.
CAUTION: Be sure the insulated jumper wire is dressed so
the it does not touch components or sharp edges.

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SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement.
●Video input system:
Multi 26 System
(Refer to Table 1)
●Intermediate Frequency
Vision IF : 38.9MHz
Color IF : 34.47MHz ※SECAM : 38.9-4.25MHz
35.32MHz(M) 38.9-4.40625MHz
Sound IF : 33.4MHz(B/G)
32.9MHz(I)
32.4MHz(D/K,K1)
34.4MHz(M)
●OSD (On Screen Display):
EZ Menu Method
●Antenna input impedance: VHF/UHF 75ohm, Unbalanced
●Voice coil impedance : 8 ohm
●External connections :
S-AV : 2pair
DVD in :1pair
A/V in : 3 pair
A/V out : 1 pair
Scart in/out :1 pair(option)
●Power requirements :
110-240 Vac, 50/60HZ
●Power consumption :
250 Wmax.
●Tuning system :
FVS
100 Program Memory
200 Program Memory(CHINA Only)
●Sound output :
R,L Out : 20 W max.+20W
Center : 10W
Dual / Stereo/NICAM
●Function :
Turbo Sound/Picture
PSM
SSM
Auto Sleep
CATV/Hyper band
Teletext (TOP/FLOF/LIST)-Option
PIP (Picture In Picture)
POP (Picture Out Picture)
●Features
Picture quality improvement circuit
- YNR (Luminance Noise Reduction)
- Picture Outline Compensation
- Digital Comb Filter
- Color Transition Improvement
- Dynamic S-VM
- Black Stretcher
- Digital Convergence
Sound quality improvement circuit
- Equalizer
Side/Back
Video in/out
Audio in (2 way)
Audio out (2 way)
R. G. B in
Specifications
1Vp-p±3dB, 75ohm
0.5Vrms±3dB, over 10Kohm
0.5Vrms±3dB, below 1Kohm
0.7Vp-p±3dB
(
●Tuning range
Band
VHF-Low
VHF-High
Hyper
UHF
S1’-S3’, S1
S2-S10,
S11-S20
S21-S41
For TV For CATV
B/G
Ch2-4
Ch5-12
D/K
Ch1-5
Ch6-12
I/I
Ch4-13
NTSC
Ch2-13
Ch21-69 Ch14-69

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Table 1 : Receiving System (26 System)
No
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
Receiving System
PPAALL--BB
PPAALL--GG
PPAALL--II
PPAALL--DD
PPAALL--KK
SSEECCAAMM--BB
SSEECCAAMM--GG
SSEECCAAMM--DD
SSEECCAAMM--KK
SSEECCAAMM--KK11
NNTTSSCC--MM
NTSC 4.43/5.5MHZ
NTSC 4.43/6.0MHZ
NTSC 4.43/6.5MHZ
SECAM-I (6.0MHZ)
SECAM-L (Video In)
NTSC 3.58/4.5MHZ/50HZ
PAL 5.5MHZ/60HZ
PAL 6.0MHZ/60HZ
PAL 6.5MHZ/60HZ
SECAM 5.5MHZ/60HZ
SECAM 6.0MHZ/60HZ
SECAM 6.5MHZ/60HZ
NTSC 3.58/5.5MHZ
NTSC 3.58/6.0MHZ
NTSC 3.58/6.5MHZ
Receiving Channel
VVHHFFBBaanndd
PAL/SECAM-B ::22--1122
PAL/SECAM-D ::
11--1122
SECAM-K1 ::22--99
NTSC-M (US) ::22--1133
NTSC-M (JAPAN) ::11--1122
UUHHFFBBaanndd
PAL/SECAM-G ::2211--6699
PAL-I ::2211--6699
SECAM-K ::2211--6699
PAL-K ::1133--5566
NTSC-M (US) ::1144--7788
NTSC-M (JAPAN) ::1133--6622
Function
Reception of broadcast and play-
back for Video Tape Recorder
Play-back for special Video Tape
Recorder
Play-back for special Video
tape/Video disk player
Play-back for special Video Tape
Recorder

- 8 -
CONTROLS DESCRIPTION
All the functions can be controlled with the remote control handset.
Some functions can also be adjusted with the buttons on the front
panel of the set.
Remote control handset
Before you use the remote control handset, please install the bat-
teries. See the next page.
1. POWER
switches the set on from standby or off to standby.
2. I/II
selects the language during dual language broadcast.
selects the sound output.
3. TURBO SOUND BUTTON
selects Turbo sound.
4. PIP BUTTONS
PIP
switches the sub picture on or off.
PR +/
-
selects a programme for the sub picture.
SWAP
alternates between main and sub picture.
INPUT
selects the input mode for the sub picture.
SIZE
adjusts the sub picture size.
STILL
freezes motion of the sub picture.
POSITION
relocates the sub picture in clockwise direction.
SCAN
switches on or off the programme scan mode 12 sub pictures .
5. MENU
selects a menu.
6. DD/ EE(Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
FF/ GG(Volume Up/Down)
adjusts the volume.
adjusts menu settings.
OK
accepts your selection or displays the current mode.
7. NUMBER BUTTONS
switches the set on from standby or directly select a number.
8. PSM (Picture Status Memory)
recalls your preferred picture setting.
9. VCR BUTTONS
control a LG video cassette recorder.
123
456
7
PSM SSM
8
0
POSITION STILL
SCAN
MIX
REVEAL
?
M
TIME
SIZE
LIST
SLEEP
STOP REC
P/STILL
REW FF
PLAY
9
POWER
I/II TV/AV
SOUND PICTURE
TURBO
PIP TEXT
PR - PR +
INPUTSWAP
MENU PR
VOL OK VOL
PR
MUTE
1
10
11
12
14
15
16
17
13
1
2
3
4
5
7
8
9
6
(With TELETEXT)

- 9 -
10. TV/AV
selects TV or AV mode.
clears the menu / text from the screen.
switches the set on from standby.
11. TURBO PICTURE BUTTON
selects Turbo picture.
12. TELETEXT BUTTONS (option)
These buttons are used for teletext.
For further details, see the ‘Teletext’ section.
13. SWAP
returns to the previously viewed programme.
14. MUTE
switches the sound on or off.
15. SSM (Sound Status Memory)
recalls your preferred sound setting.
16. LIST
displays the programme table.
17. SLEEP
sets the sleep timer.
Note : In teletext mode, the PR +/
- ,SWAP and INPUT buttons are
used for teletext function.
Battery installation
The remote control handset is powered by two AAA type batteries.
To load the batteries, turn the remote control handset over and
open the battery compartment. Install two batteries as indicated by
the polarity symbols ( and ) marked inside the compartment.
Note : To avoid damage from possible battery leakage, remove the
batteries if you do not plan to use the remote control handset for an
extended period of time.
+
-
123
456
7
PSM SSM
8
0
SIZE
STILLSCAN
POSITION
LISTSLEEP
STOP REC
P/STILL
REW FF
PLAY
9
POWER
I/II TV/AV
SOUND PICTURE
TURBO
PIP
PR - PR +
INPUTSWAP
MENU PR
VOL OK VOL
PR
MUTE
1
10
11
14
15
16
17
13
1
2
3
4
5
7
8
9
6
(Without TELETEXT)

- 10 -
1. MAIN POWER
switches the set on or off.
2. FF/ GG(Volume Up/Down)
adjusts the volume.
adjusts menu settings.
DD/ EE(Programme Up/Down)
selects a programme or a menu item.
switches the set on from standby.
3. POWER/STANDBY INDICATOR
illuminates brightly when the set is in standby
mode.
dims when the set is switched on.
4. MUTE
switches the sound on or off.
5. MENU
selects a menu.
6. OK
accepts your selection or displays the current
mode.
7. TV/AV
selects TV or AV mode.
clears the menu / text from the screen.
switches the set on from standby.
8. REMOTE CONTROL SENSOR
9. AUDIO/VIDEO IN SOCKETS (AV3)
Connect the audio/video out sockets of exter-
nal equipment to these sockets.
S-VIDEO/AUDIO IN SOCKETS (S-AV)
Connect the video out socket of an S-VIDEO
VCR to the S-VIDEO socket.
Connect the audio out sockets of the S-
VIDEO VCR to the audio sockets as in AV3.
*CASTERS (on the bottom)
turn and move the set easily.
S-VIDEO VIDEO L/MONO RAUDIO
AV3
ON/OFF
PR
PR
VOL
VOL
MUTE
MENU
OK
TV/AV
Front panel
•RT-54/44NA20T series (Side panel)
2
4
5
6
7
ON/OFF
PR
PR
VOL
VOL
MUTE
MENU
OK
TV/AV
8
9
1
3
POWER
PR
MENU MUTE
TV/AV VOL
OK
PR
MENU MUTE
TV/AV VOL
OK
8
7
165423
•RT-54/49/44NA10T series
•RT-54/44NA40T series
PR
PR
VOL
VOL
POWER
MUTE
MENU
OK
TV/AV
8
1
PR
PR
VOL
VOL
MUTE
MENU
OK
TV/AV
2
3
4
5
6
7

- 11 -
Caution :
1.Because this is not a hot chassis, it is not necessary to use an
isolation transformer.
However, the use of isolation transformer will help protect
test instrument.
2.Adjustment must be done in the correct order.
3.The receiver must be operated for about 60 minutes proir to
the adjustment.
Pre-heatrun must be operated receiving moving pictures or
100% white pattern.
●Raster Slant/Focus Adjustment
1. Preliminary steps
1) The lens focus and electrical focus must be provisional
alignment.
2) Tune the TV set to receive a EU 05 CH.
3)
Press the buttons of Remote Controller for adjustment (SVC→
→5→OK→) to reset the convergence.
2. Adjustment
1) Set only green to be appeared on the screen.
2) Carefully rotate the DY of the green CRT so that the slant of
raster become the following figure.
3) Set two color (R or B and G) to be appeared on the screen.
4) Set the slant of Red or Blue correspond to the green.
Note)
●Beam Alignment Adjustment
1. Test Equipment
Signal Generator can produce DOT pattern
2. Preliminary steps
1) Heat run over 60 minutes.
2) Pre-adjust Raster slope,Raster position & Lens focus.
3) Check if the Magnet is located 45mm from the end of CRT.
4) Receive DOT pattern.
3. 2-Pole Magnet Adjustment
1) Make Green raster using lens cover.
2) Check the center position of DOT pattern on the center of
the screen after turning Green focus volume left.
3) Turning green focus volume right and adjust 2-Pole magnet
so the position to coincide that of item 2).
4) Ajust not to shift the screen by turning green focus volume
left & right.
5) If the screen shifts, readjust 2)~4).
6) Do the same method in Red and Blue. Here, be careful not
to be stained.
4. Beam Shape (4 & 6-Pole Magnet) Adjustment
1) Do after 2-Pole magnet adjustment.
2) Make Green raster using lens cover and turn the focus
volume right.
3) Make the dot in the center a perfect circle using 4 & 6-Pole
magnet.
4) Do the same method in Red & Blue.
5) Fasten the Magnet after adjustment.
6) Adjust focus accurately.
●Centering Magnet Adjustment
1. Preliminary steps
1) Tune the TV set to receive a EU 05 CH.
2)
Press the buttons of Remote Controller for adjustment (SVC→
→5→OK→) to reset the convergence.
2. Adjustment
1) LG Convergence assy
Make red raster using lens cover and coincide
horizontal/vertical center lines of pattern with those of
screen.
2) SGS-THOMSON Convergence assy
Adjust until the center of blue signal is shifted upto 30mm left
from that of green signal and center of red signal is shifted
upto 30mm right from that of green signal with turning the
centring magnet.
3) After adjusting, recover original convergence data.
ADJUSTMENT INSTRUCTIONS
LL
Mechanical
center
1. Tighten the tightening iron after loose completely.
tighten iron which fixing DY when adjusting raster
slant and set position.
2. Never control to the tightening iron which fixed,
it’s condition is not untied.
2 Pole Magnet
4 Pole Magnet
6 Pole Magnet
45mm
L ≤2mm
M
M
M
MM
M

- 12 -
●High Voltage Regulation Adjustment
1. Test Equipment
Digital Multi-Meter(DMM)
2. Preliminary steps
1) Switch picture mode to STANDARD in no signal input.
3. Adjustment
1) Connect “+” terminal(Red) of DMM to the Anode of D432
and “-” terminal(Black) to the Heat Sink of Q406.
2) Adjust VR401 so that the D432 terminal voltage is 17.3±
0.1V.
●CUT-OFF Adjustment
1) Press the “SVC” button and then press the “ ” button on
the remote controller for adjustment to display horizontal
line.(Even though you enter into the SVC mode, the
horizontal line might not be seen according to the position
of Screen Volume.)
2) Adjust Screen Volume (R/G/B) in Focus Pack until
brightness of red/blue/green horizontal line is about not to
be seen.(At this moment, brightness of red, blue or green
horizontal line should be equal to one another.)
3) Exit the adjustment mode by pressing the “ ” button.
●Deflection Adjustment
1. Preliminary steps
1) Adjust differently based on input signal such as NTSC or
PAL.
2) NTSC adjustment should be done in STANDARD mode of
picture after receving 13CH signal,and PAL adjustment
should be done in STANDARD mode of picture after
receving EU05 CH.
3) Reset the data in convergence adjustment mode,quit the
mode.
Convergence Mode : SVC,
Data reset : 5 , OK
Adjustment mode out :
2. PAL Mode Deflection Adjustment
1) At SVC mode,press the YELLOW key get into the deflection
adjustment mode.
2) VS (Vertical Shift)
Adjust until geometric vertical certer line of the screen is
accord with the vertical center line of the screen JIG at EU
05 CH by pressing the VOLUME ◀,▶ button.
3) VA (Vertical Amplitude)
Adjust until fifth vertical line from upper and lower center of
the screen is accord with the edge of the frame.
4) VL (Vertical Linearity)
Adjust so that the boundary line between upper and lower half is
in accord with geometric horizontal center of the CPT.
5) SC (Vertical “S” Correction)
Adjust so that all distance between each horizontal lines are
to be the same.
6) HS (Horizontal Shift)
Adjust so that the horizontal center line of a digital circle pattern
is in accord with geometric horizontal center of the CPT.
7) EW (East-west Width)
Adjust until the outermost left and right vertical line of the
screen is accord with the edge of the frame.
8) ET(East-west Trapezium)
Adjust to make the length of top horizontal line same with it
of the bottom horizontal line.
9) EP (East-west Parabolar)
Adjust so that middle portion of the outermost left and right
vertical line looks like parallel with vertical lines of the CPT.
10) ES (East-west Symmetric)
After EP adjustment, adjust until deflection rate of upper
and lower screen corner is same.
11) EC (East-west Coner)
Adjust so that the vertical line at every 4 corners of the
screen looks like parallel with the vertical lines of the CPT.
12) POP P(POP Position)
After PAL signal is received in the main screen, adjust left
and right position of the POP screen until left vertical side
of the POP screen is accord with the main screen.
Caution : Store the data of deflection adjustment in
EEPROM with the “OK” button before POP P adjustment
13) Store the adjusted data in EEPROM by pressing the “OK”
button before exiting adjustment mode.
14) Restore the convergence correction data by pressing the
“TV/AV” button before exiting adjustment mode
3. NTSC Mode Deflection Adjustment
1) Adjust vertical size (VA Adjustment) until fourth vertical bar
from upper and lower center screen is accord with the edge
of the frame.
2) Adjust horizontal size (EW Adjustment) until third bar to
indicate horizontal size of circle is accord with the edge of
the frame.
3) Do other adjustments the same as in PAL mode.
Fifth Vertical Line Outmost Vertical Line
Fourth Vertical Line
Third Bar
MM
M
M

● Lens Focus & Electronic Focus Adjustment
1. Preliminary steps
1) Electronic focus,Raster slope & Raster position must be pre-
adjusted.
2) Heat-run over 60 minutes.
3) Receive Crosshatch pattern.
4) Adjustment must be operated in a dark room(simple dark
room) and pay attention not to touch the lens during
adjustment.
5) Screen the optional two lens with a cover so that the single
color is appeared on the screen.
6) When turn the light the lens at front, chromatic aberration
which appeared in bright line of cross-Hatch signal changed
as below.
2. G-lens Adjustment
1) Turn the lens until the chromatic aberration changed Blue to
Red point.
2)
Viewing the all screen, in no case of the chromatic aberration
appeared slimly within 3.5 cross-Hatch of the picture center. At
this time, in case that the red chromatic aberration's bright line
isn't equal, adjust G-lens so that the red chromatic aberration is
appeared more than previous time.
3) Switching the signal to 13CH and operate adjustment
minutely.
4) Adjust G-focus control volume of focus pack so that the
external big circle's part appeared cleary.
5) Adjust accurately by repeat the upper control.
6) Especially, noting to the G-light because it influenced on
picture's function.
3. R-lens Adjustment
1) Turn the lens until the chromatic aberration changed orange
to scarlet.
2) Adjust the chromatic aberration so that it located center
correctly.
3) Switching the signal to 13CH and adjust it as same method
of G-lens.
4) Adjust as same method of G-lens with Red focus control
volume of focus pack.
4. B- lens Adjustment
1) Turn the lens until the chromatic aberration changed purple
to green which of 3.5 Cross-Hatch part from picture's center
toward left.
2) Adjust the chromatic aberration become center of purple and
green.
Note) After adjustment Red,Green & Blue lens, remove lens
cover and receive Cross-Hatch pattern and check the overall
focus. If need, repeat above.
O Convergence Adjustment
1. Preliminary steps
1) This adjustment should be performed after raster slant,
raster position, horizontal and vertical adjustment.
2) This adjustment should be performed after warming up 60
minutes.
3) Do it always with crosshatch pattern.
4) Adjust for both PAL and NTSC system.
5) Use the jig screen with the cross hatch pattern for each
mode.
2. Convergence Key
1) Convergence Mode : SVC,
2) Cursor shift : F , G , D ,E
3) Cursor Movement/Adjustment Selection : OK
4) Cursor Color Selection : TV/AV
5) Adjustment mode out :
Note) When cursor flickers, its adjustment mode, and when
quiescent, its cursor movement mode.
O Mode Adjustment
1. Preliminary steps
Press the buttons SVC & of Remote Controller for
adjustment to get into the convergence adjustment mode.
2. Horizontal/Vertical phase Adjustment
1) Press the buttons 9 & 5 to get into the phase adjustment
mode.
2) Horizontal Phase Adjustment.
Press the volume F /G button and move the convex part
to the middle of TV screen.
3) Vertical Phase Adjustment
Press the channel D /E button and move the convex part
to the middle of TV screen.
4) Press the OK button to escape from the adjustment.
- 13 -
CHROMATIC
ABERRATION
CROSS HATCH
SIGNAL
Lens
Red
Green
Blue
Change of chromatic aberration
Orange 󱈇Scarlet
Blue 󱈇Red
Purple 󱈇Green
M
M
M

3. Pattern Position Adjustment
1) Change into pattern shift mode.
(Press numeric buttons “9” & “4”)
2) Make sure to overlap pattern and image.
(Use MUTE button)
3) Accord the center of image and pattern.
(Use F , G , D ,Ebuttons)
4) Quit pattern shift mode. (Press “OK” button)
5) Save adjusted phase/pattern position adjustment
mode.(Press “9”, “2” & “OK” buttons)
4. Green Convergence Adjustment
1)
Show the OSD on screen by pressing 2 button,then change the
OSD to green(G) adjustment mode with pressing TV/AV button.
2) Close the cover of red CRT and blue CRT so that green
display on screen only.
3) Adjust to coincide green pattern with screen jig pattern.
(Use F , G , D ,Ebuttons)
Move cursor and adjust convergence in same way with item 3).
Here, do it in the same order from center listed in figure.
5. Red Convergence adjustment
1) Show the OSD on screen by pressing 2 button,then change the
OSD to red(R) adjustment mode with pressing TV/AV button.
2) If the need arises,close the cover of the blue lens.
3) Coincide the red screen with the green screen in same way
with that of green convergence adjustment.
6. Blue Convergence adjustment
1) Show the OSD on screen by pressing 2 button,then change the
OSD to blue(B) adjustment mode with pressing TV/AV button.
2) Coincide the blue screen with the green screen in same way
with that of red convergence adjustment.
7. Adjusted Data saving
1) Save the data after adjustment.
(Press “9”, “1” & “OK” button)
2) Quit convergence adjustment mode. (“ ” button)
●White Balance Adjustment
1. Test Equipment
Brightness meter(CA110)
2. Adjustment
1) This adjustment must be operated in a dark room or
equivalent.
2) Adjust after Cut-Off and Focus adjustment.
3) The brightness meter must be located in 20±5cm distance
from the center of the screen.
4) Receive WINDOW signal.(H=190±cd/m^2,L=12±3cd/m^2)
5) Set BRIGHT to H/Light adjustment mode in 4) and enter
SVC mode by pressing the “SVC” button. Adjust RG (R
Gain) and BG (B Gain) until color coordinate becomes
X=0.280 and Y=0.300 (Deviation : ±0.01).
6) Set BRIGHT to L/Light adjustment mode and adjust CR (R
Cut Off) and CB (B Cut Off) until color coordinate becomes
X=0.280 and Y=0.300 (Deviation : ±0.01).
7) Repeat adjusting until the color coordinate of H/Light and
L/Light is satisfied.
8) Save the data after adjustment.
(Press “OK” button)
9) Quit adjustment mode. (“ TV/AV ” button)
●SUB-BRIGHT Adjustment
Receive Ch. 14 of NTSC and enter SVC mode by pressing the
“SVC” button. Adjust S-BRI data until number “2” is classified.
(Use ◀,▶,▲,▼, ENTER buttons)
●SVC Adjustment mode & Initial data
1. White Blalane adjustment data (IC:VDP3130Y)
- 14 -
8 6 5 4 5 6 8
7 5 3 2 3 5 7
6 4 2 1 2 4 6
7 5 3 2 3 5 7
8 6 5 4 5 6 8
012345 7689
US14CH
M
EA
EB
C0
1AA
220
2AA
50
57
37
110
CR
CG
CB
RG
GG
BG
S-COL
S-HUE
DVD HU
S-BRI
Menu Description
Red Cut off
Green Cut off
Blue Cut off
Red Drive
Green Drive
Blue Drive
Sub Color
Sub Hue
DVD Hue
Bright Color
Range Defalt
0~511
0~511
0~511
0~1023
0~1023
0~1023

2. Deflection adjustment data (IC:VDP3130Y)
3. Picture adjustment data (IC:VDP3130Y)
4. Sound (IC:MSP3411G) & PIP (IC:SDA9489) adj. data
5. OPTION Data Adjustment (MICOM)
- 15 -
FE10
00C8
0190
0051
0005
0007
0006
0006
0010
0000
00FA
014A
3
DVCO
IBRM
WDRM
BCLTH
BCLTM
BCLGA
SVGA
SVDEL
SVLIN
LDLY
HBST
HBSO
VSLIC
Menu Description
Digital VCO
Internal Brightness Measurement
White Drive Measurement
BCL THERSHOLD
BCL TIME
BCL GAIN
SVM GAIN
SVM DELAY
SVM LIMITER
L DELAY
H START POINT
H END POINT
V SLICE
Range Default
-2048~2047
0~1FFH
0~3FFH
0~7FFH
0~1FFH
0~1FFH
0~01FF
0~01FF
0014
0053
0020
0040
0040
61
13
0
5
0
0
40
FP
NP
SP
S1 VOL
S2 VOL
P HUE
P CON
P BKR
P BRT
P BKG
P BKB
P PKR
Menu Description
FM Prescaler
NICAM Prescaler
SCART Prescaler
SCART 1 Volume
SCART 2 Volume
Phase of Color(NTSC)
Contrast
RED Blanking Level
Brightness
Green Blanking Level
Blue Blanking Level
Red Peak Level
Range Default
0~127
0~127
0~127
0~127
0~127
0~63
0~16
0~16
0~16
0~16
0~16
0~256
07FC
0085
0004
00D5
000A
0DA0
0830
07AA
07D5
0848
0009
0008
0008
0008
07DC
0085
0006
00D5
000C
0CA0
084B
07A6
07D5
0870
0009
0008
0008
0008
VS
VA
VL
SC
HS
EW
ET
EP
ES
EC
POP P
VPOSI
POS60
POS50
Menu Description
Vertical Shift
Vertical Amp
Vertical-Lineality
S-Correction
Horizontal Shift
East-West Width
East-West Trapezium
East-West Parabola
East-West Symmetric
East-West Corner
POP Position
POP V Position
POP V Position NTSC
POP V Position PAL
Range Default
PAL NTSC
0600~0900
0050~00CF
0025~00BF
0000~009F
0000~003F
0400~0EFF
0700~08FF
06E0~0840
06A0~0AFF
0790~08E0
0790~08E0
37
46
11
7
P PKG
P PKB
P SAT
P YPE
Menu Description
Green Peak Level
Blue Peak Level
Color Saturation
Y Peaking
Range Default
0~256
0~256
0~16
0~8
option1
option2
option3
Description
1: With Teletext
0: Without Teletext(CHINA)
1: TOP + FLOF TEXT
0: FLOF TEXT
1: With Channel Name Display
(All Countries except Austrailia)
0: Without Channel Name Display
(Austrailia)
1: China+AUST.Channel Table
0: Other countries Channel table
1: With Digital EYE
0: Without Digital EYE
1: With Turbo Search
0: Without Turbo Search
1:RF 54% Sound Modulation
0: RF 100% Sound Modulation
1: With Scart Input
0: Without Scart Input
Booster on Thershold
1: With FM Stereo
0: Without FM Stereo
1: Save Dual Sound Condition
0: Not Save Dual Sound Condition
1: Channel stereo to mono compulsorily
0: No change
1: Rushed Sound Curve
(Middle East ASIA,INDIA)
0: Standard Sound Curve
(Other countries)
1: 200 Program(CHINA Only)
0: 100 Program
1: With Hotel option
0: Without Hotel option
0: BG/DK/I
1: BG/L
2: BG/DK/I/M
3: RESERVED
1: With Dolby Virtual
0:W/O Dolby Virtual
Range Default
TEXT
TOP
ACMS
CH + AU
EYE
TURBO
A-MOD
AV4
TBS ON
A2 ST
I/II SV
MONO
VOL
200 PRO
HOTEL
SYS
DOLBY

- 16 -
State
OSD
T-LAN
Default
Language
0:E Only
1:English+CIS+R+P
2:RESERVED
3:English+FARSI
4:English+Arab+URDU
5:English+Hindi
6:English+East-South Asia
7:English+THAI
8:English+China
0:West Europe
1:East Europe
2:Turkey
3:Czecho/Hungary
4:Cyrillic 1
5:Cyrillic 2
6:Cyrillic 3
7:Turkey/Greek 1
8:Turkey/Greek 2
9:Turkey/Greek 3
10:Arab/France
11:Arab/English
12:Arab/Hebrew 1
13:Arab/Hebrew 2
14:Farsi/English
15:Farsi/France
16:Farsi all
Funciton
English
English/CIS/Romania/Poland
Polish/Hungary/Czecho/Russian/English
English/Farsi
English/French/Arab+Urdu
English/Hindi
English/Indonesian/Malaysian/Vietnamese
English/Thai
English/China
English/French/Swedish/Czech/German/Spanish/Itallian
Polish/Fench/Swedish/Czech/German/Slovenian/Italian/Romanian
English/French/Swedish/Turkish/German/Spanish/Itallian
English/Hungarian/Serbian/Czech/German/Polish/Spanish/Itallian/
Romanian
option4
option3
Description
1: RF Normal sound modulation
0: HIGH deviation modulation(China)
1: Matsushita PRT.
0: S/S PRT.
1: With VFD
0: W/O VFD(A81 Model)
1: VDP3130Y B2 version
0: VDP3130Y B1 version
1:CY SENSOR
0: CDS SENSOR
Range Default
C-MUTE
SCREE
BVFD
B2-VE
CY EYE
option3
Description
1: With C-SPK IN VFD
0: W/O C-SPK IN VFD(43”)
Range Default
C-SPK
M-VOL

- 17 -
Trouble Shooting
1.NO PICTURE ( SOUND OK )
Check MAIN1 Q026(E) Waveform. CVBS Signal ?
(2Vpp)
Waveform of AV Board Q200(E) ?
Check Tuner(TU101)VIDEO output
NO Check around
IC200
Waveform ofAV Board IC202 #11 ? Check around IC201, 202
NO
Waveform of MAIN1 IC501 #63 ? Check AV Board VQ202(E)
Waveform of MAIN1 P503 #5, #7, #9 ? Check around IC501 #37, #38, #39
Output circuit.
Waveform of CPT Board
IC901R/G/B #3 ? Check around CPT Board Q901R/G/B
Waveform of CPT Socket Cathode
(RK/GK/BK) ? Check around IC901R,G,B
NO
NO
NO
NO
NOYES
YES
YES
YES
YES
YES

- 18 -
2.NO SOUND(PICTURE OK)
Waveform of AV Board IC701
#47,48,50,51,53,54,56,57
at each Mode ?
NO Check JA202 Jack
Waveform of AV Board
IC701#27,#28,#25 ?
YES
Waveform of
MAIN1 Q022(E)
( SIF ) ? Check
TU101
Waveform of
AV Board IC701
#67 ?
Check
around
Q706
Check around IC701
Check around AV Board
Q703,704,705
Waveform of MAIN1
IC601 #2,#4 IC602 #4 ?
Waveform of MAIN1
IC601 #7,#11 IC602 #7 ?
Check around
IC601,602
Check AV Board JA501,
Main1 P602 Connector
YES
YES
YES
YES
YES
NO
NO
<AV1,2,3,SCART INPUT> < RF >
NO
NO
NO

- 19 -
3.NO PIP
Waveform of AV Board
IC200 #27,29,31 ?
Waveform of AV Board
IC200 #13 ?
Waveform of PIP Board
IC1201 #26 ?
Waveform of PIP Board
IC1201 #15~#18 ?
(R,G,B, FB)
Waveform of MAIN1
IC501 #45~#48 ?
( R,G,B FB )
Check JA202
Waveform of PIP
Board IC1201 #28 ?
Check
ScartJack
JA204
Waveform of MAIN1
Q027(E) ?
Check AV Board
IC200, Q201
Check PIP Board
Q1206
Check around IC1201
Check PIP Board
Q1203,1204,1205
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
<AV1,2,3> <RF> <SCART>

- 20 -
4.NO Teletext(Picture OK)
Waveform of MAIN1
IC501 #59 ?
Waveform of IC001 #12 ?
Check OPTION1 TEXT Code
(SVC MODE)
Check PIP Board
IC1205 #2, #4
5. NO OSD (ON SCREEN DISPLAY)
Waveform of MAIN1 IC001#19,#20 ? Horizontal, Vertical Fly Back Input
Waveform of MAIN1 IC001 #38,39,40,41 ?
(R,G,B,FB)
Waveform of MAIN1 IC501 #41,42,43,44 ?
(R,G,B,FB)
Check DEF. Board.
Check MAIN1 Q010,Q009,Q002
Check input power of IC001
Check around Q014, Q015, Q016, Q017
NO
YES
YES
NO
NO
NO
YES
YES