Sharp 27L-S500 User manual

1
27L-S500,27L-X2000
CL27S50,CL27X200
COLOR TELEVISION
Chassis No. SN-84
In the interests of user-safety (Required by safety regulations in some countries) the set should be restored to its
original condition and only parts identical to those specified should be used.
S79J927L-S500
»ELECTRICAL SPECIFICATIONS......................................................................................................... 1
»IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................2
»LOCATION OF USER'S CONTROL.....................................................................................................6
»INSTALLATION AND SERVICE INSTRUCTIONS ...............................................................................8
»CHASSIS LAYOUT ............................................................................................................................ 16
»BLOCK DIAGRAM ............................................................................................................................. 20
»SCHEMATIC DIAGRAMS .................................................................................................................. 24
»PRINTED WIRING BOARD ASSEMBLIES ........................................................................................ 40
»REPLACEMENT PARTS LIST ........................................................................................................... 46
»PACKING OF THE SET ..................................................................................................................... 63
Page
POWER INPUT ................................................... 120 V AC 60 Hz
POWER RATING
27L-S500, CL27S50 ......................................................... 130 W
27L-X2000, CL27X200 ..................................................... 135 W
PICTURE SIZE ......................................... 2,187 cm2(339 sq inch)
CONVERGENCE............................................................. Magnetic
SWEEP DEFLECTION .....................................................Magnetic
FOCUS ............................................... Hi-Bi-Potential Electrostatic
INTERMEDIATE FREQUENCIES
Picture IF Carrier Frequency ..................................... 45.75 MHz
Sound IF Carrier Frequency ...................................... 41.25 MHz
Color Sub-Carrier Frequency..................................... 42.17 MHz
(Nominal)
SHARP CORPORATION This document has been published to be used for after
sales service only.
The contents are subject to change without notice.
CONTENTS
ELECTRICAL SPECIFICATIONS
Specifications are subject to change without
prior notice.
AUDIO POWER
OUTPUT RATING.............. 1.3W + 1.3W (at 10% distortion and
Dual CH Operate)
SPEAKER
SIZE ...................................................................... 8 cm (Round)
VOICE COIL IMPEDANCE...............................8 ohm at 400 Hz
ANTENNA INPUT IMPEDANCE
VHF/UHF ....................................................75 ohm Unbalanced
TUNING RANGES
VHF-Channels .............................................................. 2 thru 13
UHF-Channels ............................................................ 14 thru 69
CATV Channels .......................................................... 1 thru 125
(EIA, Channel Plan U.S.A.)
SERVICE MANUAL
MODELS
2TUNER-PIP
MTS
VIDEO IN 2 L-AUDIO-R
27L-S500, 27L-X2000
CL27S50, CL27X200

2
27L-S500,27L-X2000
CL27S50,CL27X200
IMPORTANT SERVICE SAFETY PRECAUTION
ËService work should be performed only by qualified service technicians who are throughly
familiar with all safety checks and the servicing guidelines which follow:
4A 125V
SERVICING OF HIGH VOLTAGE SYSTEM
AND PICTURE TUBE
When servicing the high voltage system,
remove the static charge by connecting a
10k ohm resistor in series with an insulated
wire (such as a test probe) between the pic-
ture tube ground and the anode lead. (AC
line cord should be disconnected from AC
outlet.)
1. Picture tube in this receiver employs integral
implosion protection.
2. Replace with tube of the same type number for
continued safety.
3. Do not lift picture tube by the neck.
4. Handle the picture tube only when wearing
shatterproof goggles and after discharging the high
voltage anode completely.
X-RADIATION AND HIGH VOLTAGE LIMITS
1. Be sure all service personnel are aware of the
procedures and instructions covering X-radiation.
The only potential source of X-ray in current solid
state TV receivers is the picture tube. However, the
picture tube does not emit measurable X-Ray
radiation, if the high voltage is as specified in the
"High Voltage Check" instructions.
It is only when high voltage is excessive that X-
radiation is capable of penetrating the shell of the
picture tube including the lead in the glass material.
The important precaution is to keep the high voltage
below the maximum level specified.
2. It is essential that servicemen have available at all
times an accurate high voltage meter.
The calibration of this meter should be checked
periodically.
3. High voltage should always be keptat the rated value
-no higher. Operation at higher voltages may cause
a failure of the picture tube or high voltage circuitry
and;also, under certain conditions, may produce
radiation in exceeding of desirable levels.
4. When the high voltage regulator is operatingproperly
there is no possibility of an X-radiation problem.
Everytime a color chassis isserviced, thebrightness
should be tested while monitoring the high voltage
with a meter to be certain that the high voltage does
notexceedthespecifiedvalueandthatitisregulating
correctly.
5. Do not use a picture tube other than that specified
ormake unrecommended circuit modificationstothe
high voltage circuitry.
6. When trouble shootingandtakingtestmeasurements
ona receiver with excessive high voltage, avoidbeing
unnecessarily close to the receiver.
Donot operate thereceiver longer than isnecessary
to locate the cause of excessive voltage.
WARNING
1. For continued safety, no modification of any circuit
should be attempted.
2. Disconnect AC power before servicing.
3. Semiconductor heat sinks are potential shock
hazards when the chassis is operating.
4. Thechassis in thisreceiver has two groundsystems
whichare separated by insulatingmaterial. The non-
isolated (hot) ground system is for the B+ voltage
regulatorcircuit and the horizontal outputcircuit. The
isolatedgroundsystemisforthelowB+ DCvoltages
and the secondary circuit of the high voltage
transformer.
To prevent electrical shock use an isolation
transformer between the line cord and power
receptacle, when servicing this chassis.
CAUTION: FOR CONTINUED
PROTECTION AGAINST A
RISK OF FIRE, REPLACE
ONLY WITH SAME TYPE 4A-
125V FUSE.

3
27L-S500,27L-X2000
CL27S50,CL27X200
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SAFETY NOTICE
Many electrical and mechanical parts in television
receivers have special safety-related characteristics.
These characteristics are often not evident from visual
inspection, nor can protection afforded by them be
necessarily increased by using replacement
components rated for higher voltage, wattage andetc.
Replacement parts which have these special safety
characteristics are identified in this manual; electrical
components having such features are identified by "å"
and shaded areas in the Replacement Parts Lists and
Schematic Diagrams.
IMPORTANT SERVICE SAFETY PRECAUTION
(Continued)
1. Inspect all lead dress to make certain that leads are
not pinched or that hardware is not lodged between
the chassis and other metal parts in the receiver.
2. Inspect all protective devices such as non-metallic
control knobs, insulating materials, cabinet backs,
adjustment and compartment covers or shields,
isolation resistor-capacity networks, mechanical
insulators and etc.
3. To be sure that no shock hazard exists, check for
leakage current in the following manner.
•Plug the AC cord directly into a 120 volt AC outlet,
(Do not use an isolation transformer for this test).
•Using two clip leads, connect a 1.5k ohm, 10 watt
resistor paralleled by a 0.15µF capacitor in series
with all exposed metal cabinet parts and a known
earth ground, such as electrical conduit or electrical
ground connected to earth ground.
•Use anAC voltmeter having with 5000 ohm per volt,
or higher, sensitivity to measure theAC voltage drop
across the resistor.
For continued protection, replacement parts must be
identical to those used in the original circuit. The use of
substitute replacement parts which do not have the
samesafetycharacteristicsasthefactoryrecommended
replacement parts shown in this service manual, may
create shock, fire, X-radiation or other hazards.
BEFORE RETURNING THE RECEIVER
(Fire & Shock Hazard)
Before returning the receiver to the user, perform
the following safety checks.
•Connectthe resistor connectionto allexposed metal
parts having a return to the chassis (antenna, metal
cabinet, screw heads, knobs and control shafts,
escutcheon and etc.) and measure the AC voltage
drop across the resistor.
AII checks must be repeated with the AC ine cord
plug connection reversed. (If necessary, a non-
polarized adapter plug must be used only for the
purpose of completing these check.)
Anycurrent measured must not exceed0.5 milliamp.
Any measurements not within the limits outlined
above indicate of a potential shock hazard and
corrective action must be taken before returning the
instrument to the customer.
1.5k ohm
10W
0.15µF
TEST PROBE
CONNECT TO
KNOWN EARTH
GROUND
TO EXPOSED
METAL PARTS
AC
VOLTMETER

4
27L-S500,27L-X2000
CL27S50,CL27X200
PRECAUTIONS A PRENDRE LORS DE LA REPARATION
Ne peut effectuer la réparation qu' un technicien spécialisé qui s'est parfaitement
accoutumé à toute vérification de sécurité et aux conseils suivants.
AVERTISSEMENT
1. N'entreprendre aucune modification de tout circuit.
C'est dangereux.
2. Débrancher le récepteur avant toute réparation.
3. Les déversoirs thermiques à semi-conducteurs
peuvent présenter un danger de choc électrique
lorsque le réceqteur est en marche.
4. Le châssis de ce récepteur possède deux systèmes
de masse qui sont séparées par du matériel
d'isolation. Le système de masse non-isolée (sous
tension) est pour le circuit du régulateur de tension
B+ et le circuit de sortie horizontale. Le système de
masse isolée est pour les tensions DC B+ basses et
lecircuitsecondairedutransformateurhautetension.
Pour éviter tout risque d'électrocution lors de
l'entretien de ce châssis, utiliser un transformateur
d'isolation entre le cordon de ligne et la prise de
courant.
4A 125V
PRECAUTION: POUR LA
PROTECTION CONTINUE
CONTRE LES RISQUES
D'INCENDIE,REMPLACER LE
FUSIBLEPAR UN FUSIBLE DE
MEME TYPE 4A-125V.
REPARATION DU SYSTEME A HAUTE
TENSION ET DU TUBE-IMAGE
Lors de la réparation de ce systéme,
supprimer la charge statique en branchant
une résistance de 10 kΩen série avec un fil
isolé (comme une sonde d'essai) entre la
mise à la terre du tube-image et le fil
d'anodel. (Le corden d'alimentation doit être
retiré de la prise murale.)
1. Le tube image dans ce récepteur emploie une
protection intégrée contre l'implosion.
2. Par mesure de sécurité, changer le tube-image pour
un tube du même numéro de type.
3. Ne pas lever le tube-image par son col.
4. Ne manipuler letube-imagequ'enporantdeslunettes
incassables et qu'après avoir déchargé totalement
la haute tension.
LIMITES DES RADIATIONS X ET DE LA
HAUTE TENSION
1. Tout le personnel réparateur doit être instruit des
instructions et procédés relatifs aux radiations X.
Le tube-image, seule source de rayons X dons les
téleviseurs transistorisés, n'émet pourtant pas de
rayonsmesurables si la haute tensionest maintenue
à un niveau préconisé dans la section "Vérification
de la haute tension".
C'estseulement quand la hautetensionestexcessive
que les rayons X peuvent entrer dans l'enveloppe
du tube-image y compris le conducteur de verre. Il
est important de maintenir la haute tension en-
dessous du niveau spécifié.
2. Il est essentiel que le réparateur ait sous la main un
voltmètre à haute tension qui doit être
périodiquement étalonné.
3. La haute tension doit toujours être maintenue à la
valeur de régime -et pas plus haute. L'opération à
des tensions plus élevées peut entraîner une panne
du tube-image ou du circuit à haute tension et, dans
certaines conditions, peut entraîner une radiation
dépassant les niveaux préscrits.
4. Quand le régulateur à haute tension fonctionne
correctement, il n'y a aucun problème de radiation
X. Chaque fois qu'un châssis couleurs est réparé, la
luminosité doit être examinée bout en contrôlant la
haute tension à l'aide d'un voltmètre pour s'assurer
que la haute tension ne dépasse pas la valeur
spécifiée et qu'elle soit correctement réglée.
5. Ne pas utiliser un tube-imageautre quecelui spécifié
et ne pas effectuer de modifications déconseillées
du circuit à haute tension.
6. Lors de la recherche des pannes et des mesures
d'essai sur un récepteur qui présente une haute
tension excessive, éviter de s'approcher inutilement
du récepteur.
Nepas faire fonctionnerle récepteur plus longtemps
que nécessaire pour localiser la cause de la tension
excessive.

5
27L-S500,27L-X2000
CL27S50,CL27X200
VERIFICATIONS CONTRE L'INCEN-DIE ET
LE CHOC ELECTRIQUE
Avant de rendre le récepteur à l'utilisateur, effectuer
les vérifications suivantes.
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AVIS POUR LA SECURITE
Denombreuses pièces, électriques et mécaniques, dans
lestéléviseursprésententdescaractéristiquesspéciales
relativesàla sécurité, qui ne sont souventpas évidentes
à vue. Le degré de protection ne peut pas être
nécessairement augmentée en utilisant des pièces de
remplacement étalonnées pour haute tension,
puissance, etc.
Les pièces de remplacement qui présentent ces
caractéristiques sont identifiées dans ce manuel; les
piècesélectriques qui présententces particularitéssont
PRECAUTIONS A PRENDRE LORS DE LA REPARATION
(Suite)
1. Inspecter tous les faisceaux decâbles pour s'assurer
que les fils ne soient pas pincés ou qu'un outil ne
soit pas placé entre le châssis et les autres pièces
métalliques du récepteur.
2. Inspecter tous les dispositifs de protection comme
les boutons de commande non-métalliques, les
isolants,le dos du coffret,lescouverclesoublindages
de réglage et de compartiment, les réseaux de
résistance-capacité, les isolateurs mécaniques, etc.
3. S'assurer qu'il n'y ait pas de danger d'électrocution
en vérifiant la fuite de courant, de la facon suivante:
•Brancher le cordon d'alimentation directem-ent à une
prise de courant de 120V. (Ne pas utiliser de
transformateur d'isolation pour cet essai).
•A l'aide de deux fils à pinces, brancher une résistance
de 1,5 kΩ10 watts en parallèle avec un condensateur
de 0,15µF en série avec toutes les pièces métalliques
exposées du coffret et une terre connue comme une
conduite électrique ou une prise de terre branchée à
la terre.
•Utiliser un voltmètre CA d'une sensibilité d'au moins
5000W/Vpourmesurerlachutedetensionentravers
de la résistance.
TO EXPOSED
METAL PARTS CONNECT TO
KNOWN EARTH
GROUND
•Toucheravec la sonde d'essai lespièces métalliques
exposées qui présentent une voie de retour au
châssis (antenne, coffret métallique, tête des vis,
arbres de commande et des boutons, écusson, etc.)
et mesurer la chute de tension CA en-travers de la
résistance. Toutes les vérifications doivent être
refaites après avoir inversé la fiche du cordon
d'alimentation.(Sinécessaire,une prise d'adpatation
non polarisée peut être utilisée dans le but de
terminer ces vérifications.)
Tous les courants mesurés ne doivent pas dépasser
0,5 mA.
Dans le cas contraire, il y a une possibilité de choc
électrique qui doit être supprimée avant de rendre le
récepteur au client.
identifiées par la marque " å" et hachurées dans la
liste des pièces de remplacement et les diagrammes
schématiques.
Pour assurer la protection, ces pièces doivent être
identiques à celles utilisées dans le circuit d'origine.
L'utilisation de pièces qui n'ont pas les mêmes
caractéristiques que les pièces recommandées par
l'usine, indiquées dans ce manuel, peut provoquer des
électrocutions, incendies, radiations X ou autres
accidents.
Voltmètre CA
1.5k ohm
10W
BRANCHER A UNE
TERRE CONNUE
AUX PIECES
METALLIQUES
EXPOSEES
0.15µF
SONDE D'ESSAI

6
27L-S500,27L-X2000
CL27S50,CL27X200
LOCATION OF USER'S CONTROL
(27L-S500, CL27S50)
Note:
• The above shaded buttons on the Remote Control glow in the dark.To use the glow-in-the-dark display on the remote control, place it under
a fluorescent light or other lighting.
• The phosphorescent material contains no radioactive or toxic material, so it is safe to use.
• The degree of illumination will vary depending on the strength of lighting used.
• The degree of illumination will decrease with time and depending on the temperature.
• The time needed to charge the phosphorescent display will vary depending on the surrounding lighting.
• Sunlight and fluorescent lighting are the most effective when charging the display.
Front Panel
CHANNEL UP/DOWN
( ) Selects next higher channel.
( ) Selects next lower channel.
POWER
Press →On.
Press again →Off.
Basic Remote Control Functions
SENSOR AREA FOR REMOTE CONTROL
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
POWER
Press →On.
Press again →Off.
REMOTE KEYPAD
Accesses any channel from keypad.
FLASHBACK
Returns to previous channel.
PERSONAL PREFERENCE
With the Personal Preference buttons,
you can program your favorite programs by
using the 4 categories A, B, C and D. The
channels can be accessed quickly by using
these buttons.
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
• In menu mode, changes or selects the TV
adjustments.
TV-CATV MODE SELECT SWITCH
InTV position,sendspowerandchannelselect
commands (Channel up/down and Random
Access buttons) to the TV.
In CATV position, sends power and channel
select commands to a cableTV converter.
VCR CONTROL
DISPLAY
Press →Display receiving channel for 4
seconds.
Press again →Displays remaining time of
SLEEP TIMER and VIEW TIMER.
Press3 times→Temporarily displaysreceiving
channel when in Closed Caption mode.
Infrared Transmitter Window
INPUT
Press →Switch to external video INPUT 1
mode.
Pressagain →Switch toexternal video INPUT
2 mode.
Press 3 times →Switch back to the original
TV mode.
ENTER
Usedin someinstanceswhere aVCR orCable
Converter Box requires an “enter” command
after selecting channels, when using the
REMOTE KEYPAD button.
CHANNEL UP/DOWN
( ) Selects next higher channel.
( ) Selects next lower channel.
• Moves the “
|
”mark of the MENU screens.
MENU
Press →Accesses MAIN MENU.
Press again →Exits MAIN MENU.
MUTE
Press →Mutes sound.
Press again →Restores sound.
• CLOSED CAPTION appears when sound is
muted.
PIP FUNCTION
With the VIDEO inputs, you can watch two
pictures at the same time.
VIDEO/AUDIO TERMINALS
(VIDEO/AUDIO terminals are also provided on
the rear.)
IN 2
1 2 3
4 5 6
7 8 9
0 100
POWER
TV
VCR
MENU
CATV
PAUSE
PIP
TV
FLASHBACK
INPUT
TV • VCR • CATV
STOP REC
REW PLAY FF
VCR CH
SWAP FREEZE MOVE SELECT
CM SKIP DISPLAY MUTE
VOL
—
CH
CH
VOL
+
ENTER
A B C D
PERSONAL PREFERENCE
POWER CH – VOL +
POWER CH – VOL +
'
"
'
"

7
27L-S500,27L-X2000
CL27S50,CL27X200
LOCATION OF USER'S CONTROL (Continued)
(27L-X2000, CL27X200)
Note:
• The above shaded buttons on the Remote Control glow in the dark.To use the glow-in-the-dark display on the remote control, place it under
a fluorescent light or other lighting.
• The phosphorescent material contains no radioactive or toxic material, so it is safe to use.
• The degree of illumination will vary depending on the strength of lighting used.
• The degree of illumination will decrease with time and depending on the temperature.
• The time needed to charge the phosphorescent display will vary depending on the surrounding lighting.
• Sunlight and fluorescent lighting are the most effective when charging the display.
Front Panel
CHANNEL UP/DOWN
( ) Selects next higher channel.
( ) Selects next lower channel.
POWER
Press →On.
Press again →Off.
Basic Remote Control Functions
SENSOR AREA FOR REMOTE CONTROL
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
POWER
Press →On.
Press again →Off.
REMOTE KEYPAD
Accesses any channel from keypad.
FLASHBACK
Returns to previous channel.
PERSONAL PREFERENCE
With the Personal Preference buttons,
you can program your favorite programs by
using the 4 categories A, B, C and D. The
channels can be accessed quickly by using
these buttons.
VOLUME UP/DOWN
(+) Increases sound.
(–) Decreases sound.
• In menu mode, changes or selects the TV
adjustments.
TV-CATV MODE SELECT SWITCH
InTV position,sends powerandchannel select
commands (Channel up/down and Random
Access buttons) to theTV.
In CATV position, sends power and channel
select commands to a cableTV converter.
VCR CONTROL
DISPLAY
Press →Display receiving channel for 4
seconds.
Press again →Displays remaining time of
SLEEP TIMER and VIEW TIMER.
Press3 times→Temporarilydisplaysreceiving
channel when in Closed Caption mode.
Infrared Transmitter Window
INPUT
Press →Switch to external video INPUT 1
mode.
Pressagain →Switch toexternal video INPUT
2 mode.
Press 3 times →Switch to external video
INPUT 3 mode.
Press 4 times →Switch back to the original
TV mode.
COMPONENT INPUT
Used to select On or Off a DTV or DVD when
you connect to Component InputTerminals.
ENTER
Usedin someinstanceswhere aVCR orCable
Converter Box requires an “enter” command
after selecting channels, when using the
REMOTE KEYPAD button.
CHANNEL UP/DOWN
( ) Selects next higher channel.
( ) Selects next lower channel.
• Moves the “ | ” m ark of the MENU screens.
MENU
Press →Accesses MAIN MENU.
Press again →Exits MAIN MENU.
MUTE
Press →Mutes sound.
Press again →Restores sound.
• CLOSED CAPTION appears when sound is
muted.
PIP FUNCTION
With the VIDEO inputs, you can watch two
pictures at the same time.
VIDEO/AUDIO TERMINALS
(VIDEO/AUDIOterminals are alsoprovided on
the rear.)
IN 2
1 2 3
4 5 6
7 8 9
0 100
POWER
TV
VCR
MENU
CATV
PAUSE
PIP
TV
FLASHBACK
IN
INPUT
TV • VCR • CATV
STOP REC
REW PLAY FF
VCR CH
SWAP FREEZE MOVE SELECT
CM SKIP DISPLAY MUTE
VOL
—
CH
CH
VOL
+
ENTER
A B C D
PERSONAL PREFERENCE
COMPONENT
POWER CH – VOL +
POWER CH – VOL +
'
"
'
"

8
27L-S500,27L-X2000
CL27S50,CL27X200
CIRCUIT PROTECTION
The receiver is protected by a 4.0A fuse
(F701), mounted on PWB-A, wired into one
side of the AC line input.
X-RADIATION PROTECTOR CIRCUIT TEST
After service has been performed on the horizontal
deflection system, high voltage system, B+ system,
test the X-Radiation protection circuit to ascertain
proper operation as follows:
1. Apply 120V AC using a variac transformer for
accurate input voltage.
2. Allow for warm up and adjust all customer controls
for normal picture and sound.
3. Receive a good local channel.
4. Connect a digital voltmeter to TP653 and make sure
that the voltmeter reads 8.9 ± 0.5V.
5. Apply external 10.9V DC at TP653 by using an
external DC supply, TV must be shut off.
6. Toreset the protector, unplug theAC cord. Now make
sure that normal picture appears on the screen.
7. If the operation of the horizontal oscillator does not
stop in step 5, the circuit must be repaired before
the set is returned to the customer.
HIGH VOLTAGE CHECK
High voltage is not adjustable but must be checked
to verify that the receiver is operating within safe
and efficient design limitations as specified checks
should be as follows:
1. Connect an accurate high voltage meter between
ground and anode of picture tube.
2. Operate receiver for at least 15 minutes at 120VAC
line voltage, with a strong air signal or a properly
tuned in test signal.
3. Enter the service mode and select the service
adjustment "S21" and Bus data "01" (Y-mute on).
4. The voltage should be approximately,28.1kV(atzero
beam).
If a correct reading cannot be obtained, check
circuitry for malfunctioning components. After the
voltage test, make Y-mute off to the normal mode.
INSTALLATION AND SERVICE INSTRUCTIONS
Note: (1)When performing any adjustments to resistor controls and transformers use non-metallic
screwdrivers or TV alignment tools.
(2)Before performing adjustments, the TV set must be on at least 15 minutes.

9
27L-S500,27L-X2000
CL27S50,CL27X200
Figure A.
For adjustments of this model, the bus data is converted to various analog signals by the D/A converter
circuit.
Note: There are still a few analog adjustments in this series such as focus and master screen voltage.
Follow the steps below whenever the service adjustment is required. See "Table-C" to determine, if serv-
ice adjustments are required.
1. Service mode
Before putting unit into the service mode, check that
customer adjustments are in the normal mode. Use
the reset function in the video adjustment menu to
ensure customer controls are in their proper (reset)
position.
2. Service number selection
Once in the service mode, press the Ch-up or Ch-
down button on the remote controller or at the set.
The service adjustment number will vary in
increments of one, from "S01" to "I10". Select the
item you wish to adjust.
3. Data number selection
Press the Vol-up or down button to adjust the data
number.
To enter the service mode and exit serv-
ice mode.
While pressing the Vol-up and Ch-up buttons at the
sametime, plug the AC cord into a wall socket.
Now the TV set is switched on and enters the service
mode.
To exit the service mode, turn the television off by
pressing the power button.
SERVICE ADJUSTMENT NUMBER
DATA NUMBER CHANNEL
(INPUT)
2
S01 081

10
27L-S500,27L-X2000
CL27S50,CL27X200
»To call up the service mode, hold down the CH UP and VOL UP keys of the unit at once and plug the AC power
cord into a wall outlet. The unit switches on and comes in the service mode.
»Now hold down both the CH UP and CH DOWN keys of the unit for 2 seconds or longer. The above default values
are written in the EEPROM.
SERVICE
No.
S01 PICTURE HEIGHT 0 ~ 127 71 RF signal input Deflection processor IC (IC502) adjusted
(or EXT. Video input)
S02 V-LINEARITY 0 ~ 31 27 ” ”
S03 V-∫CORRECTION 0 ~ 63 40 40 ” ”
S04 PICTURE WIDTH 0 ~ 63 50 45 ” ”
S05 E-W PARABOLA 0 ~ 63 15 32 ” ”
S06 E-W CORNER 0 ~ 31 13 16 ” ”
S07 TRAPEZIUM 0 ~ 127 65 64 ” ”
S08 AGC SW 0 ~ 1 1 1 ” ”
S09 PICTURE(SUB CONTRAST) 0 ~ 31 20 ” VCJ IC (IC401) adjusted
S10 TINT 0 ~ 63 31 ” ”
S11 COLOR(SUB COLOR) 0 ~ 31 15 ” ”
S12 BRIGHT (BRIGHTNESS) 0 ~ 101 58 ” ”
S13 SHARP(SHARPNESS) 0 ~ 27 5 3 ” ”
S14 V-POSITION 0 ~ 7 0 0 ” ”
S15 H-POSITION 0 ~ 31 17 ” ”
S16 R CUT-OFF 0 ~ 255 64 ” ”
S17 G CUT-OFF 0 ~ 255 64 ” ”
S18 B CUT-OFF 0 ~ 255 64 ” ”
S19 G(R) DRIVE 0 ~ 127 64 ” ”
S20 B DRIVE 0 ~ 127 64 ” ”
S21 Y-MUTE/V-OFF 0 ~ 2 0 0 ” 00: Normal, 01: Y-mute, 03: Horizontal Y-mute
S22 Y-γCURVE 0 ~ 3 3 3 ” VCJ IC (IC401) adjusted
S23 VSM PHASE 0 ~ 3 2 3 ” ”
S24 APACON PEAK f0 0 ~ 7 1 1 ” ”
S25 DC RESTORATION RATE 0 ~ 3F 21 21 ” ”
S26 DC RESTORATION LIMIT 0 ~ 3 0 3 ” ”
S27 BLACK STRETCH POINT 0 ~ 7 3 3 ” ”
S28 APL VS BPS 0 ~ 3 1 1 ” ”
S29 B.L.C. 0 ~ 1 1 1 ” ”
S30 DYNAMIC ABL POINT 0 ~ 7 4 0 ” ”
S31 DYNAMIC ABL GAIN 0 ~ 7 4 7 ” ”
S32 ABL POINT 0 ~ 7 3 3 ” ”
S33 ABL GAIN 0 ~ 7 3 2 ” ”
S34 Y-DL 0 ~ 1 0 0 ” ”
S35 TOF-f0 0 ~ 7 7 7 ” ”
S36 TOF-Q 0 ~ 7 4 4 ” ”
S37 VSM GAIN 0 ~ 3 1 3 ” ”
S38 OSD SL 0 ~ 1 0 1 ” ”
VARIABLE
DATA RANG INITIAL VALUE FIXED VALUE CONTROL DESTINATION
INPUT CONDITIONS
ADJUSTMENT ITEM

11
27L-S500,27L-X2000
CL27S50,CL27X200
S39 C-DECODE 0 ~ 255 161 161 ” ”
S40 OSD POSITION 0 ~ 15 11 ” C.C. display positioning
S41 ENERGY SAVE 0 ~ 31 10 0 ” VCJ IC (IC401) adjusted
S42 VIDEO TINT 0 ~ 63 26 ” ”
M01 INPUT LEVEL (ATT) 0 ~ 15 7 ” MTS IC (IC3001) adjusted
M02 MTS VCO 0 ~ 63 37 ” ”
M03 FILTER 0 ~ 63 30 ” ”
M04 WIDE BAND 0 ~ 63 35 ” ”
M05 SPECTRAL 0 ~ 63 22 ” ”
P01 PIP Y-LEVEL(CONTRAST) 0 ~ 127 43 ” P-IN-P adjusted
P02 PIP TINT (TINT) 0 ~ 63 41 41 ” ”
P03 PIP COLOR(COLOR_SAT) 0 ~ 127 55 RF signal input (TUNER-B) P-IN-P adjusted
P04 Y-OFFSET(Y_OFFSET) 0 ~ 31 9 9 ” ”
P05 PIP H-POSI(HXA) 0 ~ 255 10 10 ” ”
P06 BGP(HADJ) 0 ~ 15 0 0 ” ”
P07 FREE RUN(FREE_RUN_ADJ) 0 ~ 15 11 11 ” ”
C01 PICTURE-C(SUB CONTRAST) 0 ~ 31 20 13 Component signal input VCJ IC (IC401) adjusted
C02 TINT-C 0 ~ 27 21 21 ” ”
C03 COLOR-C(SUB COLOR) 0 ~ 31 15 3 ” ”
C04 BRIGHT-C(BRIGHTNESS) 0 ~ 101 58 ” ”
C05 SHARP-C(SHARPNESS) 0 ~ 27 0 0 ” ”
C06 V-POSITION-C 0 ~ 7 0 0 ” ”
C07 H-POSITION-C 0 ~ 31 19 ” ”
C08 R CUT-OFF-C 0 ~ 255 64 ” ”
C09 G CUT-OFF-C 0 ~ 255 64 ” ”
C10 B CUT-OFF-C 0 ~ 255 64 ” ”
C11 G(R) DRIVE-C 0 ~ 127 64 ” ”
C12 B DRIVE-C 0 ~ 127 64 ” ”
C13 VSM GAIN-C 0 ~ 3 2 3 ” ”
C14 COMP. C-DECODE 0 ~ 255 105 105 ” ”
SERVICE
No.
VARIABLE
DATA RANG INITIAL VALUE FIXED VALUE CONTROL DESTINATION
INPUT CONDITIONS
ADJUSTMENT ITEM
Only for
Models
27L-X2000,
CL27X200
Note 1 : This item is used only at the manufacturing factory.
Do not change the data. (If this setting is changed to "1", the adjustment data may get wrong.)
Table - A

12
27L-S500,27L-X2000
CL27S50,CL27X200
I01 E-SOUND 0 / 1 0 1
I02 DSE 0 / 1 0 0
I03 SRS 0 / 1 0 1
I04 SRS 32/36, 27 (27) 0 / 1 (32/36) 0 0
I05 A/V IN 3/2 (2) 0 / 1 (3) 0 1
I06 V-CHIP 0 / 1 1 1
I07 PinP 0 / 1 1 1
I08 COMPONENT 0 / 1 0 1
I09 ENGL/ESPA (ESPA) 0 / 1 (ENGL) 1 1
I10 DSE SHIPPED POSITION (OFF) 0 / 1 (MID) 0 0
SERVICE
NUMBER 27L-S500, CL27S50 27L-X2000,CL27X200
ADJUSTMENT CONTENTS
Table - B
RANGE
ADJUSTMENT ITEM
NECESSARY UNNECESSARY
ADJUSTMENT NOTES
PART REPLACED
Holdingdownboth the CH-up/down buttons onthe TV set atservice mode formore than2 seconds willautomatically
write the above initial values into IC1501.
The adjustment is needed to compensate for characteristics
of parts including IC401.
Data is stored in IC1501.
X
IC2001
Holding down both the CH-up/down buttons on the TV set in
the service mode for more than 2 seconds will automatically
write the above initial values into IC1501. Then perform a
complete adjustment.
Adjust items related to MTS only (M01~M05).
Adjust items related to picture tube only.
Adjust items related to P-IN-P only (P01~P07).
CRT
IC3001
IC1801
X
X
Table - C
IC1501 X
IC401 X
X

13
27L-S500,27L-X2000
CL27S50,CL27X200
ËSERVICE ADJUSTMENT
Entering The Fixed Values
1. Before starting all the adjustments, enter the fixed
values listed in Table - A.
Screen Adjustment
1. Feed the B/W pattern signal from the signal
generator.
2. Setthe S21 busdata to"01" to get theYsignal mute.
3. Adjust the S16(R), S17(G) and S18(B) settings to
Step "64".
4. Fix the S12 setting to the data 45.
5. Adjust the SCREEN control until the raster becomes
as dim as possible and just visible.
6. Select a luminance-short gun, and adjust the bus
data of S16(R), S17(G) or S18(B) to have the
luminance at the white level.
7. Adjust the SCREEN control again to cut off the CRT.
8. Set the S21 bus data to "00" to deactivate theYsignal
mute.
Sub-Picture Adjustment
1. Receive a good local channel.
2. Make sure the customer picture control is set to
maximum.
3. Enter the service mode and select the service
adjustment "S09".
4. Adjust the data value to achieve normal contrast
range.
Sub-Tint Adjustment
1. Receive a good local channel.
2. Set customer tint control to center of it's range.
3. Enter the service mode and select the service
adjustment "S10".
4. Adjust"S10" data valueto obtainnormal flesh tones.
5. Reduce the S10 data value by 5 steps. Take the
resulting S10 setting as the S42 data.
Sub-Color Adjustment
1. Receive a good local channel.
2. Make sure thecustomer color controlis setto center
position .
3. Enter the service mode andselectserviceadjustment
"S11".
4. Adjust "S11" data value to obtain normal color level.
White Balance Adjustment
White balance adjustment of composite signal input
1. Feed the B/W pattern signal via the video input
terminal from the signal generator.
2. Adjust the "S19" and "S20" settings to obtain the
specified white level.
White balance adjustment of component signal input
(Only for Models 27L-X2000, CL27X200)
1. Feed the B/W pattern signal via the component signal
input Y terminal from the signal generator.
2. Setthe S21 busdata to"01" to get theYsignal mute.
3. Adjust the C08(R), C09(G) and C10(B) settings to
step "64".
4. Select a luminance-short gun, and adjust the bus
data of C08(R), C09(G) or C10(B) to have the
luminance at the white level.
5. Adjust the "C11" and "12" settings to obtain the
specified white level.

14
27L-S500,27L-X2000
CL27S50,CL27X200
Sub-Brightness Adjustment
1. Have unit receive a good local channel.
2. Make sure the customer brightness control is set to
center position.
3. Enter the service mode and select the service
adjustment "S12".
4. Adjust "S12" data value to obtain normal brightness
level.
5. Enter the same data value as the "S12" setting to
"C04" (27L-X2000, CL27X200).
Vertical Linearity Adjustment
1. Feed the circular or crosshatch pattern signal.
2. Enter the service mode and select the service
adjustment "S02".
3. While observing the top and bottom of the screen,
adjust "S02" data value to proper vertical linearity.
Vertical Size Adjustment
1. Feed the circular or crosshatch pattern signal.
2. Enter the service mode and select the service
adjustment "S01".
3. While observing the top and bottom of the screen,
adjust "S01" data value to proper vertical size.
Vertical Phase Adjustment
1. Enter the service mode and select the service
adjustment "S14".
2. Adjust data value to "00".
Note: Thismustbe set "00" when changed dataretrace
line will appear.
Figure B.
Horizontal Position Adjustment
1. Have unit receive a good local channel.
2. Enter the service mode and select the service
adjustment "S15".
3. Adjust "S15" data value so that picture is centered.
4. Enter the "S15" setting plus 2 steps to "C07".
Caption Position Adjustment (Horizontal)
1. Have unit receive a good local channel.
2. Enter the service mode and select the service
adjustment "S40".
3. A black text box appears on the screen. (see Figure
B. below)
4. Adjust"S40" data valueso thattext box is positioned
in the center of the screen.

15
27L-S500,27L-X2000
CL27S50,CL27X200
ËMTS ADJUSTMENT
MTS Level Adjustment
1. Feed the following monaural signal to pin (14) of
IC3001.
Monaural signal : 300Hz, 245mVrms
2. Connect the rms voltmeter to pin (39) of IC3001.
3. Enter the service mode and select the service
adjustment "M01".
4. Adjust the data so that the rms voltmeter reads.
Spec.: 490 ±10mVrms.
MTS VCO Adjustment
1. Keep the unit in no-signal state.
2. Connect the frequency countertopin (39) of IC3001.
3. Connect a capacitor (100µF, 50V) in between
positive(+) side of C3005 and ground.
4. Enter the service mode and select the service
adjustment "M02"
5. Adjust the data so that the frequency counter reads.
Spec.: 62.94 ±0.75kHz.
Filter Adjustment
1. Feed the following stereo pilot signal to pin (14) of
IC3001 .
Stereo pilot signal: 9.4kHz, 600mVrms.
2. Enter the service mode and select the service
adjustment "M03".
3. Adjust the data at the point where "OK" appears on
the screen. The "OK" represents the approximate
center of the adjustable range of the data.
Separation Adjustment
1. Connect the rms voltmeter to pin (39) of IC3001.
2. Receive the following composite stereo signal 1.
Composite stereo signal: 30% modulation, left
channel only, noise reduction on, 300Hz
3. Enter the service mode and select the service
adjustment "M04".
4. Adjust the data until the AC voltage reading of the
rms voltmeter is minimum.
5. Receive the following composite stereo signal 2.
Stereo signal: 30% modulation, left channel only,
noise reduction on, 3kHz
6. Enter the service mode and select the service
adjustment "M05".
7. Adjust the data until the AC voltage reading of the
rms voltmeter is minimum.
8. Take the above steps 1 thru 8 again for fine
adjustment.
P-IN-P Y Level Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "P01".
3. Adjust "P01" data value to obtain normal contrast
level.
P-IN-P TINT Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "P02".
3. Adjust data value to "41".
P-IN-P Color Adjustment
1. Receive a good local channel.
2. Make sure the customer color control is set to center
position.
3. Enter the service mode andselectserviceadjustment
"P03".
4. Adjust "P03" data value to obtain normal color level.
P-IN-P Y-Off Set Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "P04".
3. Adjust data value to "09".
P-IN-P H-Position Adjustment
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "P05".
3. Adjust data value to "10".
P-IN-P Burst Gate Pulse (for MAIN)
1. Receive a good local channel.
2. Enter the service mode and select the service
adjustment "P06".
3. Adjust data value to "00".
P-IN-P Free Run
1. Recieve a good local channel.
2. Enter the service mode andselectserviceadjustment
"P07".
3. Adjust data value to "11".
ËP-IN-P ADJUSTMENT

16
27L-S500,27L-X2000
CL27S50,CL27X200
87109654321
A
B
C
D
E
F
G
H
MODELS 27L-S500, CL27S50 CHASSIS LAYOUT
PWB-B
PWB-K
PWB-R
PWB-H

17
27L-S500,27L-X2000
CL27S50,CL27X200
1716 1918151413121110
PWB-A

18
27L-S500,27L-X2000
CL27S50,CL27X200
87109654321
A
B
C
D
E
F
G
H
MODELS 27L-X2000, CL27S200 CHASSIS LAYOUT
PWB-B
PWB-H PWB-K
PWB-L
PWB-R

19
27L-S500,27L-X2000
CL27S50,CL27X200
1716 1918151413121110
PWB-A

20
27L-S500,27L-X2000
CL27S50,CL27X200
87109654321
A
B
C
D
E
F
G
H
MODELS 27L-S500, CL27S50 BLOCK DIAGRAM