LG KE-20P32X User manual

CHASSIS : MV-031A
MODEL : KE/KL-20/21P32X
MODEL : KF-20/21P32
MODEL
CONTENT
SPECIFICATION ................................................1-2
SAFETY INSTRUCTIONS ............................ 1-3
SERVICING PRECAUTIONS ....................... 1-4
DESCRIPTION OF CONTROLS .................. 1-6
SECTION 1 SUMMARY
TVCR
SERVICE MANUAL

1-2
SPECIFICATIONS
Video
Video Signal Processing System ....................................................................................................................................................................................................................PAL/SECAM
/NTSC 4.43(VCR playback only)
Video Head System ...........................................................................................................................................................Double azimuth 4 heads, helical scanning system
Head ...........................................................................................................................................................................................................................................................................................Two heads
Tape Speed .......................................................................................................................................................................................................................................................................................SP/LP
Tape Format ..............................................................................................................................................................................................................................................................VHS, width 1/2"
Timer ...............................................................................................................................................................................................................................................................24 hours display type
Tape Loading System ..............................................................................................................................................................................................................................................Front loading
Input/Output Signal Level .............................................................................................................................................................................................................1Vp-p, 75Ω unbalanced
Audio
Audio Recording System .....................................................................................................................................................................................................................................................Normal
Head ..................................................................................................................................................................................................................................................................................Normal(MONO)
Input/Output Signal Level .......................................................................................................................................Input (0.632Vrms, 10KΩ¡Ł), Output (0.5Vrms, 1KΩ¡Ø)
General
RF Video Receiving System ...................................................................................................................................................................................KE,KF : PAL/SECAM BG/DK/I/I’
KL : PAL/SECAM BG/L/L’
Power Source .........................................................................................................................................................................................................................................EU : AC230V, 50/60Hz
NEU : AC110-240V, 50/60Hz
Power Consumption................................................................................................................................................................................................. 14” : 65W, 20” : 100W, 21” : 110W
Power Consumption,Stand-by............................................................................................................................................................................................................................................... 12W
Channel Capability ......................................................................................................................................................VHF: 2-12, UHF: 21-69, CATV: S1-S20, HYPER: S21-S41
Tuning System .....................................................................................................................................................................................................................................................FVS 100 Program
Or 200 Program
Antenna ..................................................................................................................................................................................................................................................................UHF/VHF (75 ohm)
Sound Output ..............................................................................................................................................................................................................................3Wmax. at 50KHz deviation
Operating Environment ...............................................................................................................................................................................................Temp: 0~40deg,Humidity: 85%
ABBREVIATIONS: Used in this book
ADJ ............................................................................................Adjustment or Adjust
AFC ......................................................................Automatic Frequency Control
AGC ......................................................................................Automatic Gain Control
AMP ........................................................................................................................Amplifier
CPT................................................................................................... Color Picture Tube
DEF ........................................................................................................................Deflection
DET ...........................................................................................................................Detector
FBT ..............................................................................................Flyback Transformer
H.V ....................................................................................................................High Voltage
OSC ........................................................................................................................Oscillator
SEP .........................................................................................................................Separator
SYNC ......................................................................................................Synchronization
S.I.F .......................................................................Sound Intermediate Frequency
V.I.F .......................................................................Video Intermediate Frequency
H ...............................................................................................................................Horizontal
V ....................................................................................................................................Vertical
IC ...........................................................................................................Integrated Circuit
OSD ..................................................................................................On-Screen Display
SAP ........................................................................................Second Audio Program
BPF ...........................................................................................................Band Pass Filter
ST ....................................................................................................................................Stereo
LPF ............................................................................................................Low Pass Filter
DP ........................................................................................................Differential Phase
DG ........................................................................................................Differential Group
PLL.................................................................................................. Phase Locked Loop
APC ..................................................................................Automatic Phase Control
BM ...............................................................................................................................B+ Main
BT ............................................................................................................................B+ Tuning

1-3
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

1-4
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

1-5
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.

1-6
DESCRIPTION OF CONTROLS
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
batteries. See the next page.
1. r-I (POWER)
switches the set on from standby or off to standby.
2. NUMBER BUTTONS
switch the set on from standby or directly select a number.
3. MUTE
switches the sound on or off.
4. TIMER PROG
displays the timer programme recording menu.
5. CLEAR/RESET
resets the tape counter or clears a data in the Timer
programme menu.
6.
D
/
E
(PROGRAMME UP/DOWN)
switches the set on from standby.
selects a programme or a menu item.
7.
F
/
G
(VOLUME UP/DOWN)
adjusts the volume.
adjusts menu settings.
8. REW (REWIND/REVIEW)
rewinds the tape at high speed in the stop mode.
reviews fast the tape during playback.
9. PLAY or PLAY(X2)
plays back the tape at normal or double speed.
10.PAUSE/STILL
stops the tape temporarily during recording.
displays a still picture during playback.
11.STOP
stops the tape during playback or recording.
12.SLEEP
sets the sleep timer.
13.TRK AUTO, +/-
adjust the picture automatically or manually during playback.
14.CLOCK/COUNT
displays the current time or tape counter.
15.SP/LP
selects a recording tape speed SP or LP.
16.TELETEXT BUTTONS (option)
These buttons are used for teletext.
For further details, see the ‘Teletext’ section.
OK
PR
VOL PR VOL
PLAY
P/STILL STOP REC/ITR
REW/ FF/
SLEEP
AUTO
CLOCK/COUNT
TRK
SYSTEM Q.VIEW
SP/LP
?
TEXT
i
0
MUTE TV/AV
MENU
CLEAR/RESETTIMER PROG
12 3
45 6
78 9
EJECT
PLAY(X2)
P/STILL STOP REC/ITR
REW/ FF/
SLEEP
AUTO
CLOCK/COUNT
TRK
SYSTEM Q.VIEW
SP/LP SLOW
1
3
4
5
6
7
8
12
13
15
16
10
2
9
11
14
(With TELETEXT)
17
18
19
21
23
22
24
25
20

1-7
17.EJECT
ejects the tape.
18.TV/AV
selects a TV or AV mode.
19.MENU
selects a menu.
20.OK
accepts your selection or displays the current mode.
21.FF (FAST FORWARD/CUE)
winds the tape forward at high speed in the stop mode.
fast forward playback.
22.REC/ITR
starts a manual recording or instant timer recording.
23.SYSTEM
selects the desired VCR colour system.
24.QUICK VIEW
returns to the previously viewed programme.
25.SLOW (option)
displays a slow picture during playback.
Battery installation
The remote control handset is powered by two AA type batteries.
Gently pull down the cover of the remote control handset until the
battery compartment is exposed. 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.
OK
PR
VOL PR VOL
PLAY
P/STILL STOP REC/ITR
REW/ FF/
SLEEP
AUTO
CLOCK/COUNT
TRK
SYSTEM Q.VIEW
SP/LP
0
MUTE TV/AV
MENU
CLEAR/RESETTIMER PROG
12 3
45 6
78 9
EJECT
1
3
4
5
6
7
8
12
13
10
2
9
11
14
15
(Without TELETEXT)
17
18
19
21
23
22
24
20
PLAY(X2)
P/STILL STOP REC/ITR
REW/ FF/
SLEEP
AUTO
CLOCK/COUNT
TRK
SYSTEM Q.VIEW
SP/LP SLOW
25

1-8
1. MAIN POWER (ON/OFF)
switches the set on or off.
Note : One power line lives even when the
main power is off.
2. POWER (r-I)
switches the set on from standby or off to
standby.
3. REMOTE CONTROL SENSOR
4. AUDIO/VIDEO IN SOCKETS (AV2)
Connect the audio/video out sockets of the
external VCR to these sockets.
5. REC/ITR
starts a manual recording or instant timer
recording.
6. PLAY or PALY(X2)
plays back the tape at normal or double speed.
7. PAUSE/STILL (option)
stops the tape temporarily during recording.
displays a still picture during playback.
8. MENU (option)
selects a menu.
9. STANDBY INDICATOR
illuminates red brightly when the set is in
standby mode.
dims red when the set is switched on.
10.TIMER REC INDICATOR
illuminates red when the timer programme is
set for recording.
11.VOLUME UP/DOWN
adjusts the volume.
adjusts menu settings.
12.PROGRAMME UP/DOWN
switches the set on from standby.
selects a programme or a menu item.
13.CASSETTE COMPARTMENT
To insert a video cassette tape here.
14.REC/ITR INDICATOR
illuminates red during recording.
15.REW (REWIND/REVIEW)
rewinds the tape at high speed in the stop
mode.
reviews fast the tape during playback.
16.FF (FAST FORWARD/CUE)
winds the tape forward at high speed in the
stop mode.
fast forward playback.
17.STOP/EJECT
stops the tape during playback or recording or
ejects the tape.
18.OK (option)
accepts your selection or displays the current
mode.
19.TAPE-IN INDICATOR (option)
illuminates green while a video cassette tape
is inserted.
20.HEADPHONE SOCKET (option)
connect the headphone plug to this socket.
Note : In some models, you might drop the set if
you move it only with the handle on the top of the
set. So you can should support the bottom of the
set at the same time.
Front panel
,,,
,,,,,
,,,,,,,,
,,,,,,,,
,,,,,,,,
,,,,,,,,,
,,,,,,,,
,,,,,,,,
,,,,,,,
,,,,
,,
,,,
,,,,,
,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,,
,,,,,,,,
,,,,,
,,
,
REC TIMER REC STAND-BY
VOL
PR REC/ITR
FF/
REW/
ON/OFF
STOP/EJECT
/
PLAY(X2)
4
13 14 9
2 17 15 6 16 5 3 10 2011 121
REC/iTR REW/ PLAY FF/ P/STILL STOP/EJECT MENU OK
VOL
PR
STAND-BY TAPE-IN TMER REC
ON/OFF
AV2
VIDEO- IN -AUDIO
20
4
ON/OFF
/
VOL PR STOP/EJECT REW/ PLAY FF/ REC/ITR
AV2 AUDIO
VIDEO
H/P
REC TIMER-REC STAND-BY
IN
13 15 16 10 43
111 12 17 6 5 14 920
2
ON/OFF VOL PR
STOP/EJECT REW/ PLAY FF/ REC/ITR
REC TIMER-REC STAND-BY
13 15 16 103
111 12 17 6 5 14 9 20
4
20
2
14
13 15 16 17 1918
13 5 6 7 8 910 11 12
2 4
P
L
A
Y
R
E
W
/
F
F
/
ON/OFF
VOL PR
STOP/EJECT
REC/ITR
REC TIMER REC STAND-BY
P
L
A
Y
R
E
W
/
F
F
/
ON/OFF
VOL PR
STOP/EJECT
REC/ITR
REC TIMER REC STAND-BY
13
12 17 15 6 16 5 3 14 10 9
11 12

CHASSIS : MV-031A
MODEL : KE/KL-20/21P32X
MODEL : KF-20/21P32
MODEL
CONTENT
EXPLODED VIEW .............................................2-2
EXPLODED VIEW PARTS LIST..................2-3
DISASSEMBLY INSTRUCTIONS ..................2-4
SECTION 2 DISASSEMBLY PART
TVCR
SERVICE MANUAL

2-2
EXPLODED VIEW
330
320
315
603
610
601
602
A00
501
520
174
913 510
112
153
170
150
310
943 400
120

2-3
112 2426GCA40CP 2426GDA80CS CPT SET
2426VDC0029 - CPT SET
120 120-D44D 120-D44D SPEAKER,GENERAL 16 OHM 3W/5W 83DB
150 150-D02M 150-D02N COIL, DEGAUSSING,CU 21 60T 12 OHM
153 6150Z-1014A 6150Z-1024A DY
170 170-A01F 170-A01F CPT EARTH
174 6410VEH004A 6410VEH004A POWER CORD HIT101 HARNESSINDO VDE/SEMKO
300 3091V00268N 3091V00269L CABINET ASSEMBLY,W/SECAM NON MV031A IN LOCAL
3091V00268M - CABINET ASSEMBLY,W/O SECAM MV031A IN LOCAL
3091V00268Q 3091V00269N(LGEAP) CABINET ASSEMBLY
310 5020V00401C 5020V00399C BUTTON,CONTROL
315 3580V00014S 3580V00014S DOOR,CST, W/SECAM
3580V00014Y - DOOR,CST, W/O SECAM
320 320-075B 320-075B SPRING,COIL
330 5020V00402B 5020V00400B BUTTON,POWER
400 3809V00195C 3809V00195C BACK COVER ASSEMBLY
3809V00195D 3809V00195D BACK COVER ASSEMBLY, KKF20P30 #LOCAL LGEIN
3809V00195J 3809V00195H(LGEAP) BACK COVER ASSEMBLY
501 4810V00206B 4810V00206B BRACKET,MAIN HIPS-407AF BRACKET SMPS
520 6871VDM893D 6871VDM893E PWB ASSY,MAIN2 WITH CPT PCB(LOCA. NO. 510)
6871VDM893N(KIOTA) 6871VDM893Z(LGEAP) PWB ASSY,MAIN2 WITH CPT PCB(LOCA. NO. 510)
601 4810V00195E 4810V00195E BRACKET,MAIN 15-21TVCR 35DECK MV031A HIPS 60HR
4810V00206B(KIOTA) 4810V00206A(LGEAP) BRACKET,MAIN
- 4810V00206B(LGERU) BRACKET,MAIN
602 4814V00158B 4814V00158B SHIELD,BOTTOM P10/20/30 NON SBHG .
603 4814V00157F 4814V00157F SHIELD,TOP P10/20/30 NON SBHG PAL(20/21INCH)
610 6871VMMP01S 6871VMMP01T PWB ASSY, MAIN MV-031A KL-20/21P32X
6871VMMP01N 6871VMMQ30N(LGERU) PWB ASSY, MAIN MV-031A
6871VMMQ30P 6871VMMQ30T(LGEAP) PWB ASSY, MAIN MV-031A (CKD) 20” RUSSIA W/O TXT
6871VMMQ30K PWB ASSY, MAIN MV-031A (CKD) 20” KIOTA W/O TXT
913 332-057B 332-057B SCREW ASSY,HEXAGON HEAD
943 1PTF0403116 1PTF0403116 SCREW,TAP TITE(P)[TRUSS HEAD]
A00 6721R-0710C 6721R-0710C
DECK ASSEMBLY,VIDEO D35(N) (2HD, NP, AHC(X), B/C(X), VCR)
(Refer to 4-28P.~ 5-2P)
LOCA. NO 20” 21”
PART NO DESCRIPTIONS
EXPLODED VIEW PARTS LIST
The components identified by mark is
critical for safety.
Replace only with part number specified.

DISASSEMBLY INSTRUCTIONS
2-4
1. Back Cover Removal
Remove the screws residing on the back cover and carefully
separate the back cover from the front cabinet and P/cord
holder barcket.(Refer to Fig. 2-1, 2-2)
2. Main 2 PCB Removal
Grasp both sides of the support frame and pull it back and up.
3. Main Chassis Removal
1) Remove 2 screws securing the Main chassis to the front
cabinet.
2) Grasp both sides of the chassis and pull it back
4. Speaker Assembly Removal
1) Remove the connector between the speaker and the main
chassis.
2) To remove the speaker, remove the screw.
5. CPT REMOVAL
1) After removal of VCR chassis and speaker assy, remove the
CPT board from CPT neck.
2) Plase the cabinet with the front down on suitable cushion.
3) Remove 4 screws swcuring the CPT to the cabinet.
4) Carefully separate CPT from front cabinet.
PICTURE TUBE HANDLING CAUTION
Due to high vacuum and large surface area of picture tube, great
care is needed when handling the picture tube. Always lift the
picture tube by grasping it firmly around faceplate. NEVER LIFT
THE TUBE BY ITS NECK. The picture tube must not be scrated
or subject to excessive pressure as gracture of the glass may
result in an implosion of considerable violence which can cause
personal injury or property damage.
Fig. 2-1 Fig. 2-2
CPT
Board
Remove
Screws
Main 2
PCB
Main chassis
Speaker

CHASSIS : MV-031A
MODEL : KE/KL-20/21P32X
MODEL : KF-20/21P32
MODEL
CONTENT
PURITY & CONVERGENCE ADJUSTMENT ........3-2
ADJUSTMENT INSTRUCTIONS .................3-5
BLOCK DIAGRAM .............................................3-9
WIRING DIAGRAM ........................................ 3-10
TROUBLESHOOTING CHARTS .................3-11
PRINTED CIRCUIT BOARDS .......................3-16
COMPONENT LOCATION GUIDE .............3-17
SECTION 3 ELECTRICAL PART
TVCR
SERVICE MANUAL

3-2
PURITY & CONVERGENCE ADJUSTMENT
Caution:
Convergence and Purity have been factory aligned. Do not
attempt to tamper with these alignments.
However, the effects of adjacent receiver components, or
replacement of picture tube or deflection yoke may require the
need to readjust purity any convergence.
¡Purity Adjustment
This procedure DOES NOT apply to bonded yoke and picture
tube assemblies.
The instrument should be at room temperature (60 degrees F or
above) for six (6) hours and be operating at low beam current
(dark background) for approximately 20 to 30 minutes before
performing purity adjustments.
CAUTION: Do not remove any trim magnets that may be
attached to the bell of the picture tube.
1. Remove the AC power and disconnect the internal
degaussing coil.
2. Remove the yoke from the neck of the picture tube.
3. If the yoke has the tape version beam bender, remove it and
replace it with a adjustable type beam bender (follow the
instructions provided with the new beam bender)
4. Replace the yoke on the picture tube neck, temporarily
remove the three (3) rubber wedges from the bell of the
picture tube and then slide the yoke completely forward.
5. Reconnect the internal degaussing coil.
6. Position the beam bender locking rings at the 9 o'clock
position and the other three pairs of tabs (2,4 and 6 pole
magnets) at the 12 o'clock position.
7. Perform the following steps, in the order given, to prepare the
receiver for the purity adjustment procedure.
a. Face the receiver in the "magnetic north" direction.
b. Externally degauss the receiver screen with the television
power turned off.
c. Turn the television on for approximately 10 seconds to
perform internal degaussing and then turn the TV off.
d. Unplug the internal degaussing coil. This allows the
thermistor to cool down while you are performing the purity
adjustment. DO NOT MOVE THE RECEIVER FROM ITS
"MAGNETIC NORTH" POSITION.
e. Turn the receiver on and obtain a red raster by increasing
the red bias control (CW) and decreasing the bias controls
for the remaining two colors (CCW).
f. Attach two round magnets on the picture tube screen at 3
o'clock and 9 o'clock positions, approximately one (1) inch
from the edge of the mask (use double-sided tape).
DEFLECTION YOKE
PURITY &CONVERGENCE
MAGNET ASSEMBLY
RUBBER
WEDGES
GLASS CLOTH TAPE
,,,,
,,,,
,,,,,
,,,,
,,,,
,,
,,
,,,
,,,
,,
,,,,,
,,,,,
,,,,,
,,,,,,
,,,,,
,,,,,
,,,,,
,,,,,
,,
PURITY MAGNET
6-POLE
4-POLE
4-POLE
MAGNET
CONVERGENCE MAGNET ASSEMBLY
6-POLE
MAGNES PURITY MAGNET(2-POLE)
X-AXIS YOKE
POSITIONING
(L/R PURITY)
6-POLE
MAGNETS
CONVERGENCE MAGNET ASSEMBLY

3-3
8. Referring to above, perform the following two steps:
a. Adjust the yoke Z-axis to obtain equal blue circles.
b. Adjust the appropriate beam bender tabs to obtain correct
purity (four equal circles).
9. After correct purity is set, tighten the yoke clamp screw and
remove the two screen magnets.
10. Remove the AC power and rotate the receiver 180 degrees
(facing "magnetic south").
11. Reconnect the internal degaussing coil.
12. Turn the receiver on for 10 seconds (make sure the receiver
came on) to perform internal degaussing, and then turn the
receiver off.
13. Unplug the internal degaussing coil.
14. Turn on the receiver and check the purity by holding one (1)
round magnet at the 3 o'clock and a second round magnet at
9 o'clock position. If purity is not satisfactory, repeat steps 8
through 14.
15. Turn off the receiver and reconnect the internal degaussing
coil.
¡Convergence Adjustment
Caution: This procedure DOES NOT apply to bonded yoke and
picture tube assemblies.
Do not use screen magnets during this adjustment
procedure. Use of screen magnets will cause an
incorrect display.
1. Remove AC power and disconnect the internal degaussing
coil.
2. Apply AC Power and set the brightness to the Picture Reset
condition. Set the Color control to minimum.
3. Apply 8V to the pin.
4. Adjust the Red, Green and Blue Bias controls to get a dim
white line.
5. Remove the AC power and 8V from the pin.
6. Reconnect the internal degaussing coil and apply AC power.
7. Turn the receiver on for 10 seconds to perform internal
degaussing and then turn the receiver off again.
8. Unplug the internal degaussing-coil.
9. Turn on the receiver, connect a signal generator to the VHF
antenna terminal and apply a crosshatch signal.
Caution: During the convergence adjustment procedure, be
very careful not to disturb the purity adjustment tabs
are accidentally move, purity should be confirmed
before proceeding with the convergence adjustments.
Note: Make sure the focus is set correctly on this instrument
before proceeding with the following adjustment.
10. Converge the red and blue vertical lines to the green vertical
line at the center of the screen by performing the following
steps (below TABLE).
a. Carefully rotate both tabs of the 4-pole ring magnet
simultaneously in opposite directions from the 12 o'clock
position to converge the red and blue vertical lines.
b. Carefully rotate both tabs of the 6-pole ring magnet
simultaneously in opposite directions form the 12 o'clock
position to converge the red and blue (now purple)
vertical lines with the green vertical line.
11. Converge the red and blue horizontal with the green line at
the center of the screen by performing the following steps.
(below TABLE)
a. Carefully rotate both tabs of the 4-pole ring magnet
simultaneously in the same direction (keep the spacing
between the two tabs the same) to converge the red and
blue horizontal lines.
b. Carefully rotate both tabs of the 6-pole ring magnet
simultaneously in same direction (keep the spacing
between the two tabs the same) to converge the red and
blue (now purple) horizontal lines with the green
horizontal line.
c. Secure the tabs previsouly adjusted by locking them in
place with the locking tabs on the beam bender.
MAGNETS
RED RED
1.ADJUST YOKE Z-AXIS FIRST
TO GET EQUAL BLUE
COLOR CIRCLES
2 .ADJUST BEAM BENDER 2 POLE
MAGNET TO GET FOUR EQUAL
COLOR CIRCLES

3-4
RING
PAIRS
4
POLE
ROTATION DIRECTION
OF BOTH TABS
OPPOSITE
SAME
OPPOSITE
SAME
MOVEMENT OF RED
AND BLUE BEAMS
B B
RR OR
OR
B R B R
OR
B
R
B
R
B R OR BR
6
POLE
12. While watching the 6 o'clock positions on the screen, rock the
front of the yoke in a vertical (up/down) direction to converge
the red and blue vertical lines. (Fig upper left)
13. Temporarily place a rubber wedge at the 12 o'clock position
to hold the vertical position or the yoke.
14.
Check the 3 o'clock and 9 o'clock areas to confirm that the red
and blue horizontal lines are converged.
If the lines are not converged, slightly offset the vertical tilt of the
yoke (move the rubber wedge if necessary) to equally balance the
convergence error of the horizontal lines at 3 o'clock and 9 o'clock
and the vertical lines at 6 o'clock and 12 o'clock.
15. Place a 1.5 inch piece of glass tape over the rubber foot at
the rear of the 12 o'clock wedge.
16. While watching the 6 o'clock and 12 o'clock areas of the
screen, rock the front of the yoke in the horizontal (left to
right) motion to converge the red and blue horizontal lines.
(Fig. upper right)
17. Temporarily place a rubber wedge at the 5 o'clock and 7
o'clock positions to hold the horizontal position of the yoke.
18. Check the 3 o'clock and 9 o'clock areas to confirm that the
red and blue vertical lines are converged. If the lines are not
converged, slightly offset the horizontal tilt of the yoke (move
the temporary rubber wedges if necessary) to equally
balance the convergence error of the horizontal lines at 6
o'clock and 12 o'clock and the vertical lines at 3 o'clock and 9
o'clock.
19. Using a round magnet confirm purity at the center, right and
left sides and corners. See Purity Adjustment Procedure.
20. Reconfirm convergence and apply a 1.5 inch piece of glass
tape over the rubber foot at the rear of the 5 o'clock and the 7
o'clock wedges.
RED
BLUE
RED BLUE
BLUE
RED
GREEN
GREEN
BLUE RED
GREEN
GREEN
ADJUSTMENT
VIEWING
AREA
UP/DOWN ROCKING OF THE YOKE
CAUSES OPPOSITE ROTATION OF RED
AND BLUE RASTERS
ADJUSTMENT
VIEWING
AREA RED
RED
GREEN
TV
SCREEN
LEET/RIGHT ROCKING OF THE YOKE
CAUSES OPPOSITE SIZE CHANGE OF
THE RED AND BLUE RASTERS
UP/DOWN ROCKING OF THE YOKE
CAUSES OPPOSITE ROTATION OF RED
AND BLUE RASTERS
LEFT/RIGHT ROCKING OF THE YOKE
CAUSES OPPOSITE SIZE CHANGE OF THE
RED AND BLUE RASTERS

3-5
ADJUSTMENT INSTRUCTIONS
1. APPLICATION RANGE
This specification is applicable to tvcr’s (MV-031Achassis)
manufactured in the tv factory or the approved site.
1.1 MAIN PRUDUCTION FORM
-. SET ( O )
-. SKD ( O )
-. CKD ( 0 )
2. DESIGNATION
2.1. Hot GND & Cold GND must be connected separately to
prevent electric shock and to protect equipments because
this chassis is an insulation chassis.
2.2. The adjustment must be done by the exact sequence.
But, it can be changeable within the allowable margin of
error.
2.3. Adjust surrounding condition: unless otherwise noted,
adjust to the following condition.
Surrouding Temperature: 25cC!5 cC
Reality Humidity : 60 % !20 %
Embedded Component Body Temperature In PCB: 25cC!5 cC
2.4. The AC line voltage of TV must be maintained at 110-230V
@50/60 Hz.(NEU AC 110V-240V)
2.5. Before any adjustment, TV set must have warming time for
15 minutes.
2.6. Necessary instrument
- Multimeter (ADJUSTMENT/ASSEMBLY Line)
Max Input Current : over 1A / Max Input Voltage : 500Vdc
Measurement Range : 10Vdc ~ 100Vdc / Accuracy : 0.03%
- Oscilloscope : (ADJUSTMENT/ASSEMBLY Line)
Frequency Band: over 20MHZ/Input Impedance: over 1MX
Input Capacitance : below 30pF / Max Input Voltage : 250V
- 10:1 PROBE
2.7. SIGNAL
Unless otherwise noted,input the STANDARD COLOR SIGNAL
60~80 dBu.
The standard color signal is LG’s standard digital signal.
It refers the standard color signal to LG standard signal.
If LG standard signal is a criterion,PAL standard signal is PAL-
B/G 05 CH and SECAM standard signal is SECAM 04CH or
40CH.
LG standard color signal has priority to others and other
vendors which use different equipment from LG can use the
PHILIPS DIGITAL PATTERN or COLOR BAR PATTERN or
CIRCLE PATTERN depend on itmes.
3. DECK LINE ADJ. (VCR DECK/CIRCUIT ADJ.)
3.1. P2/P3 TEMPORARY ADJUSTMENT
3.1.1. NECESSARY INSTRUMENT
1. PAL SP Normal TAPE
2. OSCILLOSCOPE
3. 10:1 PROBE : 2 PIECES
4. SPECIAL NUT DRIVER (P2/P3 for Adjustment)
3.1.2. ADJUSTMENT
1. Play the PAL SP NORMAL TAPE.
2. Connect the oscilloscope(CH-1) to J123(H/SW) of main
PCB.
3. Connect the oscilloscope(CH-2) to J158(RF) of main PCB.
4. With observing the RF envelope waveform, adjust P2, P3
until it becomes the waveform C.
5. Check the envelope waveform is in the maximum size by
pressing the TRK UP(+), down(-) button.
3.2. CTL/AUDIO LEVEL ADJUSTMENT
3.2.1. NECESSARY INSTRUMENT
1. CTL TAPE
2. PAL SP Normal TAPE(AUDIO LEVEL for Adjustment)
3. OSCILLOSCOPE
4. 10:1 PROBE : 2 PIECES
5. RMS METER(AUDIO LEVEL for Adjustment)
3.2.2. CTL ADJUSTMENT
THIS ADJUSTMENT MUST BE DONE WHEN THE
UNCONTROLLED DECK IS WAREHOUSED.
1. Connect the oscilloscope to J101(CTL).
2. After playing the CTL control tape, make sure the CTL
waveform range is from 1.5 :1 to 2.5 : 1. If it is out of range ,
ADJUST PART LOCATION
TAKE-UP
REEL
AZIMUTH ADJUST SCEW X- DISTANT FIX SCREW
HEIGHT ADJUST SCREW
TILT ADJUST SCREW
CAPSTAN T/UPARM
X-DISTANT ADJUST GROOVE
PINCH-ROLLER
SUPPLY
REEL
DRUM
P2 P3
FE HEAD
P1
TENTION ARM
P4
P0
ADJUST PART LOCATION
TAKE-UP
REEL
AZIMUTH ADJUST SCEW X- DISTANT FIX SCREW
HEIGHT ADJUST SCREW
TILT ADJUST SCREW
CAPSTAN T/UPARM
X-DISTANT ADJUST GROOVE
PINCH-ROLLER
SUPPLY
REEL
DRUM
P2 P3
FE HEAD
P1
TENTION ARM
P4
P0
TAKE-UP
REEL
AZIMUTH ADJUST SCEW X- DISTANT FIX SCREW
HEIGHT ADJUST SCREW
TILT ADJUST SCREW
CAPSTAN T/UPARM
X-DISTANT ADJUST GROOVE
PINCH-ROLLER
SUPPLY
REEL
DRUM
P2 P3
FE HEAD
P1
TENTION ARM
P4
P0
P2
<A> P2 POSTADJUSTMENT
P3
<B> P3 POSTADJUSTMENT
D
<C> FINAL ADJUSTMENT WAVWFORM
P2P2
<A> P2 POSTADJUSTMENT
P3
P3
<B> P3 POSTADJUSTMENT
FIGURE 2> P2/P3 ADJUSTMENT WAVEFORM
D
<C> FINAL ADJUSTMENT WAVWFORM

3-6
adjust CTL waveform to the following procedures.
A. If is over 2.5 :1, lower the head height.
After turning the height adjust screw counter-clockwise to
adjust its level from 1.5 : 1 to 2 : 1.
Check the tape location at P4. Readjust the TILT.(2:1)
B. If is under 1.5:1, heighten the head height.
After turning the height, adjust the screw clockwise to
adjust its level from 2 : 1 to 2.5 : 1.
Check the tape location of P4. Readjust the TILT.(2:1)
3. Play the standard tape and adjust very carefully the azimuth
screw right and left by using the oscilloscope and level-
meter to maximize the audio sound.
Adjust the azimuth screw & the height adjust screw at the
same time because they have mutual relationship. (Check
CTL again after the adjustment)
*A/C head adjustment order
Height adjust screw->check the TILT->azimuth screw
->check CTL
3.2.3 AUDIO LEVEL CHECKING AND ADJUSTMENT
1. Connect “+” terminal of RMS meter (auto level meter) to J108
on the main PCB Audio output and “-” terminal to GND.
2. Check that if audio level of RMS meter satisfies with the
spec,If audio sound is weak, adjust the A/C head azimuth
screw.
3. Audio level spec
1K :0.5 !0.1Vrms
6K :1KHz !1.5dB
3.3. X-DISTANT/P2,P3 ADJUSTMENT
3.3.1. NECESSARY INSTRUMENT
1. SP PAL TAPE
2. OSCILLOSCOPE
3. 10:1 PROBE : 2 PIECES
4.SPEACIAL DRIVER FOR ADJUSTMENT(P2,P3,X-
DISTANT(NUT),AUDIO(NUT))
5. RMS METER(AUDIO LEVEL METER)
3.3.2. ADJUSTMENT PREPARATION
1.Connect oscilloscope(CH-1) to J123(H/SW) on main PCB.
(Use for trigger of CH-2 )
2.Connect oscilloscope(CH-2) to J158(RF) on main PCB.
(Use waveform of CH-2)
3. Play by inserting SP PAL TAPE. (2hd:normal tape)
4. After the picture is appeared, make initial condition by
pressing the tracking adjustment up(+) button of the remote
controller.
3.3.3. X-DISTANCE ADJUSTMENT
1. Turn the X-distant adjust groove of the deck right and left to
maximize the scope waveform.
2. Check that if waveform satisfies with the linearity by pressing
TRK Up(+) and Down(-) button.
3. Tighten the X-distant adjust screw.
3.3.4. P2/P3(RF LINEARITY) CHECK & ADJUSTMENT
1. Adjust p2 & p3 so that the the RF envelope waveform of the
oscilloscope becomes C in figure 2.
2. Check if the envelope waveform becomes maximum by
pressing TRK Up(+),Down(-) button onestep.
3.4. PG ADJUSTMENT
Adjust it after finishing controlling the Deck.
3.4.1.NECESSARY INSTRUMENT
1. SP PAL TAPE
2. OSCILLOSCOPE
3. 10 : 1 PROBE : 2 PIECES
3.4.2. ADJUSTMENT
1. Insert and play the SP PAL TAPE.
2. Connect the oscilloscope(CH-1) to H/SW(J123) on the main
PCB and trigger in setting the VOL/DIV to 1V range.
3. Connect the oscilloscope(CH-2) to video out(J173) on the
main PCB and set the VOL/DIV to 500mV range.
4. Set the TIME/DIV of oscilloscope to 50us range.
5. Adjust the falling edge(412us !20us) of vertical sync in the
video signal by varying VR01.
4.ASSEMBLY LINE ADJUSTMENT
4.1. RF AGC ADJ.( APPLYING THE W/S TUNER )
4.1.1. NECESSARY INSTRUMENT : DIGITAL MULTIMETER
4.1.2. ADJUSTMENT PREPARATION
1. HEAT-RUN at least 15 minutes before adjustment.
2. Input the PAL DIGITAL PATTERN(EU05); The intensity of
electric field for the applied tuner refers to the below data.
3. Connect the DIGITAL MULTIMETER to TP-AGC(J335) of
MAIN1.
4.1.3. ADJUSTMENT
1. Press the SVC key of the transmitter and select¡AGC¡–of the
SVC MENU using PR+/- key.
2. Adjust it by the below data varying VOL+/- key.
4.2. FOCUS ADJUSTMENT
4.2.1. Receive the standard color signal.
4.2.2. Let the picture be the most clear by the criterion of the
vertical line of it, varying the focus V/R of FBT.
12
CTL WAVEFORM
12
CTL WAVEFORM
12
CTL WAVEFORM
ADJUST PERIOD (6.5H = 412us)
PG ADJUST WAVEFORM
*CAUTION: SET THE TRIGGER MODE OF OSCILLOSCOPE TO DC
ADJUST PERIOD (6.5H = 412us)
PG ADJUST WAVEFORM
*CAUTION: SET THE TRIGGER MODE OF OSCILLOSCOPE TO DC
TUNER
6700VPF009V
6700VMF001H
6700VPF009Q
Electric fields strenth
AGC Voltage
AGC Voltage
70dBu ! 1dBu
2.7 ! 0.05Vdc
AGC not adjust.
Setting & Adjustment

4.3. PURITY AND CONVERGENCE ADJUSTMENT
: Warm up the TV set at least 15 minutes before adjustment.
4.3.1. PURITY ADJUSTMENT
1. After degaussing the CPT with using the degaussing coil, set
the picture at Standard ON.
2. Receive the raster signal or E50CH(red pattern) from a
pattern generator.
3. Move the DY toward CPT PANEL to put the picture like the
figure 5.
4. Turn the purity magnet(the second pole magnet) to let red
color located at the center of picture. At the same time let
color-line located at the center vertically.
5. After finishing the second pole magnet adjustment, fix it
temporarily by the lock ring.
6. Let the picture became uniform red color by moving the DY
slowly backward and then tighten the fixing screw. (Check
the slope)
4.4. SCREEN ELECTRIC VOLTAGE
1. Input PAL DIGITAL PATTERN(EU05 CH).
2. Select CHANNEL 0.
3. Connect the probe of oscilloscope to the RK of CPT PCB.
4. Set the oscilloscope to 50V/DIV, 20us/DIV(using 10:1 Probe )
and after putting the GND ling upon the lowest grid line of the
scope by pushing the GND button, enter into DC
mode.
* Adjust screen volume of FBT so that the waveform is the same
as below figure.
4.5 WHITE BALANCE
4.5.1 NECESSARY INSTRUMENT
: WHITE BALANCE METER
4.5.2 ADJUST PREPARATION
1. Adjust it after warming up the meter over 20 minutes.
2. Input the picture with the white signal and black signal at
upper and lower side each in a standard of the CPT’s
horizontal center.
3. Set this picture in the status of standard ON.
4.5.3 ADJUSTMENT
: Press the SVC key of a transmitter which is possible to control
the SVC and adjust the RG and BG varying the VOL +/-, in the
status of the initial data 32 of the CG in SVC MENU on the
screen. (This chassis adjusts only the high light.)
4.6. DEFLECTION DATA ADJUSTMENT
4.6.1. Input PAL DIGITAL PATTERN(EU05CH).
4.6.2. Press SVC key on the service remote controller and
select LINE SERVICE 2 mode.Adjustable item is selected
by CH+/- key,variable item is selected by VOL +/- key.
4.6.3. Deflection Early Establishment Data
4.6.4.VERTICAL SLOPE, V-SLP ADJUSTMENT
Select V-SLP mode and adjust until horizontal center line of
the large circle coincides with blanking line
4.6.5. VERTICAL AMPLITUDE, V-AMP ADJUSTMENT
Select V-AMP mode , and adjust until the upper and lower
end of the large circle reach 5mm inside from the effective
area of CPT.
4.6.6. VERTIVAL SHIFT, V-SFT ADJUSTMENT
Select V-SFT mode and adjust until the horizontal center
coincides with the vertical sign Slot mark of CPT.
4.6.7. HORIZONTAL SHIFT, H-SFT ADJUSTMENT
Select H-SFT mode and adjust until the vertical center
coincides with horizontal sign slot mark of CPT.
4.6.8. VERTICAL S-CORRECTION, S-COL ADJUSTMENT
Select S-COL mode and adjust until the grid of cross hatch
pattern is even all over the screen.
R BGG
< figure 5 >
PICTURE STANDARD ON
CONTRAST : 85%
BRIGHTNESS : 70%
COLOUR : 50%
140V BLACK LEVEL(DC)
GND
V
140V BLACK LEVEL(DC)
GND
V
No
1
2
140V !3V
130V !3V 21/20/15” CPT
14” CPT
Adjust Voltage Remark Note
Model(14/20/21)
EU
NON-EU
9000K
10000K
288
281
295
288
X Y Color Temperature
Model(15 FLAT )
EU
NON-EU
9000K
12000K
288
272
295
288
X Y Color Temperature
Status
V-SLP
V-AMP
V-SFT
H-SFT
S-COL
Vertical Slope
Vertical Amplitude
Vertical Shift
Horizontal Shift
Vertical S-correction
25
31
32
32
15
25
31
32
32
15
25
31
32
32
15
25
31
32
32
15
Adjust Cintents 15”21” 20” 14”
3-7

4.7. CDL DATA ADJUSTMENT
1. Input PAL DIGITAL PATTERN(EU05CH).
2. Press SVC key on the service remote controller and select
LINE SERVICE 1 mode.
Adjustable item is selected by CH+/- key,variable item is
selected by VOL +/- key
3. Initial Establishment Data
* 2nd SIF OPTION
4.8. LANGUAGE
Status
AGC
GG
RG
BG
PEAK
CDL
2nd SIF
RF Gain
Green Drive Gain
Red Drive Gain
Blue Drive Gain
Peaking Control
Cathode Drive Level
2nd SIF
15
32
32
32
25
10
0
15
32
32
32
25
08
0
15
32
32
32
25
12
0
15
32
32
32
25
12
0
Ccntents 15”21” 20” 14”
Mode
0
1
2
OFF
BG
DK
INternal BPF
BG : EXTERNAL DK/I:INTERNAL BPF
DK: EXTERNAL BG/I:INTERNAL BPF
Funtion Remark Note
No
1
2
3
4
FRANCE
GERMANY
Other EU
Except EU
FRENCH
GERMAN
ENGLISH
ENGLISH
If buyer request special
language we can
accept it.
Country Language Remark Note
3-8