LG PT-53A83T User manual

TV/
DIGITALINDEX
CH:
LR
C
LS RS
CACATVTV
PROPRO LOGICLOGIC
MOVIESPORMOVIESPORTSMUSICTSMUSIC
COLOR TV
SERVICE MANUAL
CAUTION
BEFORE SERVICING THE CHASSIS,
READ THE SAFETY PRECAUTIONS IN THIS MANUAL.
CHASSIS : MP-015A
MODEL : PT-53A83T
website:http://biz.LGservice.com
e-mail:http://www.LGEservice.com/techsup.html

- 2 -
CONTENTS
Contents .......................................................................................................... 2
Safety Precautions ..........................................................................................3
Servicing Precautions .................................................................................... 4
Specifications ................................................................................................. 6
Control Descriptions ...................................................................................... 8
Adjustment......................................................................................................11
Troubleshooting.............................................................................................18
Block Diagram................................................................................................26
Printed Circuit Board.....................................................................................30
Wiring Diagram...............................................................................................42
Exploded View .............................................................................................. 44
Exploded View Parts List...............................................................................45
Replacement Parts List ................................................................................ 46
SVC. Sheet .........................................................................................................

- 3 -
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 1MΩ and 5.2MΩ.
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

- 5 -
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.

- 6 -
SPECIFICATIONS
NOTE : Specifications and others are subject to change without notice for improvement.
OVideo input system:
Multi 26 System
(Refer to Table 1)
OIntermediate 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)
OOSD (On Screen Display):
EZ Menu Method
OAntenna input impedance: VHF/UHF 75ohm, Unbalanced
OVoice coil impedance : 8 ohm
OExternal connections :
AV Input : V/L/R : 1 (Side)
V/L/R : 2 (Rear,PT-)
AV Output : V/L/R : 1 (Rear,PT-)
Component Input : Component 1 :480i/L/R
Component 2:480p/L/R
S-VIdeo Input : Y/C : 2 (Side 1,Rear 1)
Scart : Full Scart(With RGB Input) : 1
Half Scart : 1 (AV In/Out)
Half Scart : 1 (AV In/YC In)
OPower requirements :
110-240 Vac, 50/60HZ(PT-)
230 Vac, 50HZ(PE/PL-)
OPower consumption :
250 Wmax.
OTuning system :
FVS 100 Program Memory(With Teletext Model)
FVS 200 Program Memory(W/O Teletext Model)
OSound output :
R,L Out : 10 W+10W(48,53”),20W+20W(43”)
Center : 10W(Option)
SL/SR : 5W+5W (Option)
OFunction :
Turbo Sound/Picture
PSM
SSM
Auto Sleep
CATV/Hyper band
Teletext (TOP/FLOF/LIST)-Option
Multi Window PIP
OFeatures
Picture quality improvement circuit
- YNR (Luminance Noise Reduction)
- Picture Outline Compensation
- Digital Comb Filter
- Color Transition Improvement
- Dynamic S-VM
- Black Stretcher
- Digital Eye
- Digital Convergence
- Digital 100Hz & Progressive
- Digital Index
- Dvd Input
Sound quality improvement circuit
- Pro Logic(48,53”)/ Virtual(43”)
- Equalizer
Video in/out
Audio in (2 way)
Audio out (2 way)
Specifications
1Vp-p¡3dB, 75ohm
0.63Vrms¡3dB, over 10Kohm
0.5Vrms¡3dB, below 1Kohm
(
O 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

- 7 -
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.
4/12 PIP
switches on or off the programme scan mode through 4 or 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
4/12PIP
MIX
REVEAL
?
M
TIME
SIZE
LIST
SLEEP
EYE
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
18
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.
18. EYE
switches the eye function on or off.
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.
+
-
1 2 3
4 5 6
7
PSM SSM
8
0
SIZE
STILL4/12PIP
POSITION
LISTSLEEP
EYE
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
18
13
1
2
3
4
5
7
8
9
6
(Without TELETEXT)

- 10 -
1. MAIN POWER (ON/OFF)
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
displays information which is input to the set
with three different brightness.
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. EYE (option)
adjusts picture according to the surrounding
conditions.
10. 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.
11. CENTRE SPEARKER (PT-48/53A83 series only)
LEFT/RIGHT LOUD-SPEARKERS
Only in PT-48/53A83 series model, the
left/right loud-speakers are detachable and
need to be connected to the SPEAKER OUT
sockets on the back panel of the set as indi-
cated by red (+) and black (-) knobs.
Note : Before placing the speakers, screw the
speaker legs to the holes on them.
*CASTERS (on the bottom)
turn and move the set easily.
S-VIDEO VIDEO L/MONO RAUDIO
AV3
ON/OFF
PR MUTE
MENU
OK
TV/AV
PR
VOL
VOL
Front panel
•PT-48/53A83 series
(Side panel)
2
4
5
6
7
ON/OFF
PR MUTE
MENU
OK
TV/AV
PR
VOL
VOL
8
9
10
11 1
3
PR MUTE
MENU
OK
TV/AV
PR
VOL
VOL
ON/OFF
•PT-43A83 series
8
9
11

- 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.
O 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$) to reset the convergence.
2. Adjustment
1) Set only green to be appeared on the screen.
2) Carefully rotate the DY of the green CRT so that the slant of
raster become the following figure.
3) Set two color (R or B and G) to be appeared on the screen.
4) Set the slant of Red or Blue correspond to the green.
Note)
O Beam Alignment Adjustment
1. Test Equipment
Signal Generator can produce DOT pattern
2. Preliminary steps
1) Heat run over 60 minutes.
2) Pre-adjust Raster slope,Raster position & Lens focus.
3) Check if the Magnet is located 45mm from the end of CRT.
4) Receive DOT pattern.
3. 2-Pole Magnet Adjustment
1) Make Green raster using lens cover.
2) Check the center position of DOT pattern on the center of
the screen after turning Green focus volume left.
3) Turning green focus volume right and adjust 2-Pole magnet
so the position to coincide that of item 2).
4) Ajust not to shift the screen by turning green focus volume
left & right.
5) If the screen shifts, readjust 2)~4).
6) Do the same method in Red and Blue. Here, be careful not
to be stained.
4. Beam Shape (4 & 6-Pole Magnet) Adjustment
1) Do after 2-Pole magnet adjustment.
2) Make Green raster using lens cover and turn the focus
volume right.
3) Make the dot in the center a perfect circle using 4 & 6-Pole
magnet.
4) Do the same method in Red & Blue.
5) Fasten the Magnet after adjustment.
6) Adjust focus accurately.
O Centering Magnet Adjustment
1. Preliminary steps
1) Tune the TV set to receive a EU 05 CH.
2)
Press the buttons of Remote Controller for adjustment (SVC$
$5¡OK$) to reset the convergence.
2. Adjustment
1) LG Convergence assy
Make green 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
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
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 -
O 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
21.3!0.1V.
O 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.
O 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 F,Gbutton.
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) 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.
5) EW (East-west Width)
Adjust until the outermost left and right vertical line of the
screen is accord with the edge of the frame.
6) 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.
7) ET(East-west Trapezium)
Adjust to make the length of top horizontal line same with it
of the bottom horizontal line.
8) A-ANG(AFC Angle)
9) A-BOW(AFC BOW)
10) U-C(Upper Cotner Pincushion)
11) L-C(Lower Cotner Pincushion)
12) U-VL(Upper Vertical Linearity)
13) L-VL(Lower Vertical Linearity)
14) VL (Vertical Linearity)
Adjust so that the boundary line between upper and lower half is
in accord with geometric horizontal center of the CPT.
15) SC (Vertical “S” Correction)
Adjust so that all distance between each horizontal lines are
to be the same.
16) V-ASP(Vertical Aspect Ratio)
Adjust the vertical aspect ratio.
17) Store the adjusted data in EEPROM by pressing the “OK”
button before exiting adjustment mode.
18) 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

O 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 -
8 6 5
7 5 3
6 4 2
Lens
Red
Green
Blue
Change of chromatic aberration
Orange ¤AScarlet
Blue ¤ARed
Purple ¤AGreen
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 MUTEbutton)
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)
O White Balance Adjustment
1. Test Equipment
Brightness meter(CA110),Pattern Generator(Window Pattern)
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.
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=0.282 and Y=0.286 (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)
O SUB-BRIGHT Adjustment
1) Tune the TV set to receive a EU 05 CH.
2) Enter SVC mode by pressing the “SVC” button. Adjust S-
BRI data until 100% and 80% GRAY PATTERN is
classified.
(Use F , G , D ,E,ENTER buttons)
O DVCO Adjustment
1) Tune the TV set to receive a EU 05 CH.
2) Enter the adjustment mode by pressing SVC button of
Remote Controller for adjustment,then select DVCO menu.
Operate auto adjustment with VOLGbutton.
If DVCO data is changed,auto adjustment has finished.
3) After finishing DVCO adjustment,save the data by pressing
OK button.
O PIP POSITION Adjustment
1) After receiving a PAL signal,show the multi-picture scan
screen on screen with pressing WD2 9/4PIP button.
2) Check the left,right blank on SCAN screen.(May be
20±5mm)
3) If the left,right blank isn’t 20±5mm and symmetry,enter the
adjustment mode by pressing SVC button of Remote
Controller for adjustment and select service adjustment
mode 5 by pressing YELLOW button.
4) Adjust M-HOR and M-VER to symmetry of left,right blank in
service adjustment mode 5.
5) When finishing adjustment,save the data by pressing OK
button.
- 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
100%,80% GRAY PATTERN
M
Left Blank Right Blank

O SVC Adjustment mode & Initial data
1. White Blalane adjustment data (IC:CXA2100)
2. Deflection adjustment data (IC:CXA2100)
3. Picture adjustment data (IC:CXA2100)
4. Sound adjustment data (IC:MSP3452)
5. Picture adjustment data (IC:SDA9410)
- 15 -
12
1F
19
0C
3F
19
1A
RD
GD
BD
RC
GC
BC
S-BRI
DVCO
Menu Description
Red Drive
Green Drive
Blue Drive
Red Cut-off
Green Cut-off
Blue Cut-off
Sub BRIGHT
Digital VCO
Range Default
10
13
2A
1E
20
6
11
11
D
7
6
7
7
3
1F
11
10
1A
1D
1E
6
11
11
C
5
6
7
7
3
1F
VS
VA
HS
EW
EP
ET
U-C
L-C
U-VL
L-VL
VL
A-ANG
A-BOW
SC
V-ASP
Menu Description
Vertical Shift
Vertical Amp
Horizontal Shift
East-West Width
East-West Parabola
East-West Trapezium
UP Corner Pincushion
LO Corner Pincushion
UP Vertical LIneality
LO Vertical LIneality
Vertical LIneality
AFC Angle
AFC Bow
Vertical S-Correction
Aspect ratio control
Range
Range
Range
Default
PAL NTSC
1
2
1
1
1
2
1
0
3
3
1
3
1
D-COL
COLAX
DCOL
LIMLE
CTILE
GAMMA
LTILE
BLKBO
ABLTH
ABLMO
VM-LE
PREOV
DPIC
Menu Description
Dynamic Color ON/OFF
Color matrix
Dynamic Color Temperate
RGB Amplitude Limiter Level
CTI Level
GAMMA correction
LTI Level
RGB Bottom LImiter Level
ABL threshold
ABL Mode
VM Level
Pre/Over-Shoot Control
Auto Pedestal level
Default
3
A
0
1
7
4
7
4
0
1
0
0
0
37
1B
A
C
DC-TR
LRGB2
DL-PA
SHPF0
CB-F1
CR-F1
CB-F2
CR-F2
VCOMP
EW-DC
AKBT2
HCOMP
VBLKW
LE-BL
RI-BL
S-CON
P-ABL
Menu Description
DC transmission control
RGB2 output level control
DElay Line switching
Sharpness f0
INput1 CB signal DC Offset
INput1 CR signal DC Offset
INput2 CB signal DC Offset
INput2 CR signal DC Offset
A-SAW output gain control
EW output DC level
AKB time shift
EW output DC control
VBLK width control
Left HBLK width control
Right HBLK width control
Sub contrast
PEAK ABL
Default
1B
73
18
50
50
24
FD
64
09
06
FM
NP
SP
S1 VOL
S2 VOL
MDB-ST
MDB-LIM
MDB-HMC
MDB-LP
MDB-HP
Menu Description
FM Prescaler
NICAM Prescaler
SCART Prescaler
SCART 1 Volume
SCART 2 Volume
MDB Effect Bass Strength
MDB Amplitude Limit
MDB Harmonic Content
MDB Low Pass
MDB High Pass
Range Default
13
0e
0a
00
00
Aa
13
3
A2
7
7
VDEM
NRY
NRC
NRKY
NRKC
ODELM
VDELS
FSEL
RF AGC
M-HOR
M-VER
Menu Description
Vsync input delay(main)
Temporal Noise Reduction of Y
Temporal Noise Reduction of C
Output Processing delay master
Vsync input delay(sub)
Filter Select
RF AGC Level
Horizontal PIP Position
Vertical PIP Position
Range Default

6. OPTION Data Adjustment
- 16 -
option3
Description
1: With Teletext
0: Without Teletext(CHINA)
1: RF 54% Modulation INput
0: RF 100% Modulation INput
1: China+AUST.Channel Table
0: Other countries Channel table
Range Default
TEXT
SCART
CH + AU
option1
option2
option3
Description
1: 200 Program(CHINA Only)
0: 100 Program
1: With TURBO Search
0: Without TURBO Search
1: Save Dual Sound Condition
0: Not Save Dual Sound
Condition
1: TOP + FLOF TEXT
0: FLOF TEXT
1: With Digital EYE
0: Without Digital EYE
1: With FM Stereo
0: Without FM Stereo
0 : BG/I/DK(PE-)
1 : BG/L(PL-)
2: BG/I/DK/M(PT-)
3 : RESERVED
1: Wih Channel Name Display
(All Countries except Austrailia)
0: Without Channel Name Display
(Austrailia)
1: Rushed Sound Curve
(Middle East ASIA,INDIA)
0: Standard Sound Curve
(Other countries)
1: With AV4 Input
0: Without AV4 Input
1: PE/PL Model
0: PT Model
1: With COMPONENT1 Input
0: Without COMPONENT1 Input
1: With COMPONENT2 Input
0: Without COMPONENT2 Input
1: With VGA Input
0: With VGA Input
1: With CENTER SPK
0: Without CENTER SPK
1: Digital Index button
0: SOUND MUTE button
1: RF Normal Sound Modulation(Others)
0: High Deviation Modulation(CHINA)
1: With DOLBY Pro LOgic
0: Without DOLBY Pro LOgic
1: With DOLBY Virtual Surround
0: Without DOLBY Virtual Surroud
Range Default
200 PRO
TSEAR
I/II SV
TOP
EYE
A2 ST
SYS
ACMS
VOL
AV4
EU
DVD i
DVD p
VGA
C SPK
VFD
C MUTE
DOLBY
V-DOL

- 17 -
State
LANG
T-LAN
Default
Language
0:E Only
1:EU 5EA
2:EU ETC
3:PARSI
4:ARAB DUAL
5:English+Hindi
6:English+I+M+V
7:English+THAI
8:English+China
0:West Europe
1:East Europe
2:Turkey
3:EAST EU2
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/German/French/Italy/Spanish
Pol./Hungary/Czecho/Russia/Eng
English/Parsi
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

- 18 -
Trouble Shooting
1.NO PICTURE ( SOUND OK )
Check MAIN1 Q101(E) Waveform. CVBS Signal ?
(2Vpp)
Waveform of AV Board IC202 #63 ?
Check Tuner(TU101)VIDEO output
NO Check around
IC202
Waveform of AV Board Q505(E) ? Check around IC202
NO
Waveform of VIDEO Board
IC501 #72 ? Check IC501
Waveform of VIDEO Board
IC501 #31~#50? Check around IC501 #31~#50 Output circuit.
Waveform of VIDEO Board
IC706 #84,87,90 ? Check aroundIC706
Waveform of VIDEO Board
IC702 #26,28,30 ? Check around IC702
NO
NO
NO
NO
NOYES
YES
YES
YES
YES
YES
Waveform of
CPT SOKET CATHODE(RK/GK/BK) ?
YES
Check IC901 R.G.B
NO

- 19 -
2.NO SOUND(PICTURE OK)
Waveform of AV Board IC205
#47,48,50,51,53,54,56,57
at each Mode ?
NO Checkarround
each Jack
Waveform of AV Board
IC205 #25,27,28?
YES
Waveform of
MAIN1 Q103
Q104 ( SIF ) ? Check
TU101
Waveform of
AV Board IC205
#67 ?
Check
around
IC205
Check around IC205
Check around AV
Board Q215,216,217
Waveform of MAIN1
IC601?
Waveform of MAIN1
IC601 #7 #11 ?
Check around
IC601,602
YES
YES
YES
YES
NO
NO
<AV1,2,3,DVD(480i),DVD(480p) INPUT> <RF >
NO
NO
NO

- 20 -
3.NO PIP
Waveform of AV Board
IC202 #8,15,22,35 ?
Waveform of Video Board
IC202 #44 ?
Waveform of Video Board
IC502 #72 ?
Waveform of Video Board
IC502 #31~#50 ?
(R,G,B, FB)
Waveform of Video
IC706 #51~#73 ?
( Y,U,V)
Check JA202
Waveform of PIP
Board IC502
#1,2,3,7,9 ?
Check
ScartJack
JA204
Waveform of MAIN1
Q110(E) ?
Check Video Board
Q203,IC202
Check P212B
Check around IC502
Check PIP Board
IC706
NO
NO
NO
NO
NO
NO
YES
YES
YES
YES
YES
YES
<AV1,2,3> <RF> <SCART>