SHARP 27L-S500, CL27S50, 27L-X2000, CL27X200 Diagram

27L-S500,27L-X2000 CL27S50,CL27X200

SERVICE MANUAL

S79J927L-S500

COLOR TELEVISION

Chassis No. SN-84

2 TUNER-PIP MTS

VIDEO IN 2 L-AUDIO-R

27L-S500, 27L-X2000

MODELS

CL27S50, CL27X200

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.

CONTENTS

Page

» 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

ELECTRICAL SPECIFICATIONS

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)

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.)

Specifications are subject to change without prior notice.

SHARP CORPORATION

This document has been published to be used for after sales service only. The contents are subject to change without notice.

27L-S500,27L-X2000 CL27S50,CL27X200

Service work should be performed only by qualified service technicians who are throughly familiar with all safety checks and the servicing guidelines which follow:

IMPORTANT SERVICE SAFETY PRECAUTION

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. The chassis in this receiver has two ground systems which are separated by insulating material. The nonisolated (hot) ground system is for the B+ voltage regulator circuit and the horizontal output circuit. The isolated ground system is for the low B+ DC voltages 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

4A 125V

ONLY WITH SAME TYPE 4A125V FUSE.

SERVICING OF HIGH VOL T AGE 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 picture 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-RADIA TION AND HIGH VOL TAGE 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 Xradiation 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 kept at 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 operating properly there is no possibility of an X-radiation problem. Every time a color chassis is serviced, the brightness should be tested while monitoring the high voltage with a meter to be certain that the high voltage does not exceed the specified value and that it is regulating correctly .

5. Do not use a picture tube other than that specified or make unrecommended circuit modifications to the high voltage circuitry .

6. When trouble shooting and taking test measurements on a receiver with excessive high voltage, avoid being unnecessarily close to the receiver. Do not operate the receiver longer than is necessary to locate the cause of excessive voltage.

2 2

IMPORT ANT SER VICE SAFETY PRECAUTION

1.5k ohm 10W

0.15µF

TEST PROBE

CONNECT TO KNOWN EARTH GROUND

TO EXPOSED METAL PARTS

VOLTMETER

(Continued)

27L-S500,27L-X2000 CL27S50,CL27X200

BEFORE RETURNING THE RECEIVER (Fire & Shock Hazard)

Before returning the receiver to the user, perform the following safety checks.

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 an AC voltmeter having with 5000 ohm per volt, or higher, sensitivity to measure the AC voltage drop across the resistor.

• Connect the resistor connection to all exposed 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 nonpolarized adapter plug must be used only for the purpose of completing these check.) Any current measured must not exceed 0.5 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.

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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.

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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 same safety characteristics as the factory recommended replacement parts shown in this service manual, may create shock, fire, X-radiation or other hazards.

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 le circuit secondaire du transformateur haute tension. 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.

PRECAUTION: POUR LA PROTECTION CONTINUE CONTRE LES RISQUES

4A 125V

D'INCENDIE, REMPLACER LE FUSIBLE P AR 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 kΩ en 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 le tube-image qu'en porant des lunettes 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 rayons mesurables si la haute tension est maintenue à un niveau préconisé dans la section "Vérification de la haute tension". C'est seulement quand la haute tension est excessive 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 endessous 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-image autre que celui 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. Ne pas faire fonctionner le récepteur plus longtemps que nécessaire pour localiser la cause de la tension excessive.

27L-S500,27L-X2000

2 2

CL27S50,CL27X200

PRECAUTIONS A PRENDRE LORS DE LA REPARATION

(Suite)

VERIFICATIONS CONTRE L'INCEN-DIE ET LE CHOC ELECTRIQUE

Avant de rendre le récepteur à l'utilisateur , effectuer les vérifications suivantes.

1. Inspecter tous les faisceaux de câbles 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, les couvercles ou blindages 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 kΩ 10 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/V pour mesurer la chute de tension en travers de la résistance.

• T oucher avec la sonde d'essai les pièces 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. (Si nécessaire, une prise d'adpatation non polarisée peut être utilisée dans le but de terminer ces vérifications.) T ous 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.

Voltmètre CA

1.5k ohm 10W

0.15µF

SONDE D'ESSAI

AUX PIECES METALLIQUES

TO EXPOSED

EXPOSEES

METAL PARTS

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

BRANCHER A UNE TERRE CONNUE

CONNECT TO KNOWN EARTH GROUND

AVIS POUR LA SECURITE

De nombreuses pièces, électriques et mécaniques, dans les téléviseurs présentent des caractéristiques spéciales relatives à la sécurité, qui ne sont souvent pas 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 pièces électriques qui présentent ces particularités sont

234567890123456789012345678901212345678901234567890123456789012123456789012345678901234567890121

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.

27L-S500,27L-X2000 CL27S50,CL27X200

Front Panel

LOCATION OF USER'S CONTROL

(27L-S500, CL27S50)

POWER

Press → On. Press again → Off.

VOLUME UP/DOWN

(+) Increases sound. (–) Decreases sound.

Basic Remote Control Functions

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

In TV position, sends power and channel select commands (Channel up/down and Random Access buttons) to the TV. In CATV position, sends power and channel select commands to a cable TV converter.

VCR CONTROL

DISPLAY

Press → Display receiving channel for 4 seconds. Press again → Displays remaining time of SLEEP TIMER and VIEW TIMER. Press 3 times → Temporarily displays receiving channel when in Closed Caption mode.

POWERCH– VOL +

SENSOR AREA FOR REMOTE CONTROL

POWER

VCR

INPUT

1 2 3 4 5 6 7 8 9

ENTER

100

VOL

MENU CATV

VCR CH

FLASHBACK

PERSONAL PREFERENCE

A B C D

VOL

—

REW PLAY FF

PAUSE

STOP REC

PIP

CM SKIP DISPLAY MUTE

SWAP FREEZE MOVE SELECT

TV • VCR • CATV

VIDEO/AUDIO TERMINALS

IN 2

(VIDEO/AUDIO terminals are also provided on the rear.)

CHANNEL UP/DOWN

( ) Selects next higher channel.

( ) Selects next lower channel.

Infrared T ransmitter Windo w

INPUT

Press → Switch to external video INPUT 1 mode. Press again → Switch to external video INPUT 2 mode. Press 3 times → Switch back to the original TV mode.

ENTER

Used in some instances where a VCR or Cable 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.

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.

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.

LOCATION OF USER'S CONTROL (Continued)

Front Panel

POWER

Press → On. Press again → Off.

VOLUME UP/DOWN

(+) Increases sound. (–) Decreases sound.

(27L-X2000, CL27X200)

POWERCH– VOL +

SENSOR AREA FOR REMOTE CONTROL

27L-S500,27L-X2000 CL27S50,CL27X200

VIDEO/AUDIO TERMINALS

IN 2

(VIDEO/AUDIO terminals are also provided on the rear.)

CHANNEL UP/DOWN

( ) Selects next higher channel.

( ) Selects next lower channel.

Basic Remote Control Functions

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

In TV position, sends power and channel select commands (Channel up/down and Random Access buttons) to the TV. In CATV position, sends power and channel select commands to a cable TV con v erter.

VCR CONTROL

DISPLAY

POWER

VCR

COMPONENT

INPUT

1 2 3 4 5 6 7 8 9

ENTER

100

VOL

MENU CATV

VCR CH

FLASHBACK

PERSONAL PREFERENCE

A B C D

VOL

—

REW PLAY FF

PAUSE

STOP REC

PIP

CM SKIP DISPLAY MUTE

SWAP FREEZE MOVE SELECT

TV • VCR • CATV

Infrared T ransmitter Windo w

INPUT

Press → Switch to external video INPUT 1

mode. Press again → Switch to external 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 Input Terminals.

ENTER

Used in some instances where a VCR or Cable 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.

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.

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.

27L-S500,27L-X2000 CL27S50,CL27X200

INSTALLA TION 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.

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-RADIA TION 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. T o reset the protector, unplug the AC 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 VOL T AGE 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 120V AC 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 (at zero 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.

27L-S500,27L-X2000 CL27S50,CL27X200

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 service 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 Chdown 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.

SERVICE ADJUSTMENT NUMBER

To enter the service mode and exit service 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.

DATA NUMBER

CHANNEL

(INPUT)

S01 081

Figure A.

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

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 S10 TINT 0 ~ 63 31 ” ” S11 COLOR(SUB COLOR) 0 ~ 31 15 ” ” S12 BRIGHT 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 ” S22 Y-γ CURVE 0 ~ 3 3 3 ” VCJ IC (IC401) adjusted S23 VSM PHASE 0 ~ 3 2 3 ” ” S24 APACON PEAK f0 0 ~ 7 1 1 ” ” S25 S26 S27 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 ” ”

ADJUSTMENT ITEM

PICTURE(SUB CONTRAST)

(BRIGHTNESS)

DC RESTORATION RATE DC RESTORATION LIMIT BLACK STRETCH POINT

VARIABLE

DATA RANG

0 ~ 31 20 ” VCJ IC (IC401) adjusted

0 ~ 101 58 ” ”

0 ~ 3F 21 21 ” ” 0 ~ 3 0 3 ” ” 0 ~ 7 3 3 ” ”

INITIAL

VALUE

FIXED

VALUE

INPUT CONDITIONS

(or EXT. Video input)

CONTROL DESTINATION

00: Normal, 01: Y-mute, 03: Horizontal Y-mute

27L-S500,27L-X2000 CL27S50,CL27X200

SERVICE

No. 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 P02 PIP TINT (TINT) 0 ~ 63 41 41 ” ” P03 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

C01 C02 TINT-C 0 ~ 27 21 21 ” ” C03 C04 C05 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 ” ”

ADJUSTMENT ITEM

PIP Y-LEVEL(CONTRAST)

PIP COLOR(COLOR_SAT)

FREE RUN(FREE_RUN_ADJ)

PICTURE-C(SUB CONTRAST)

COLOR-C(SUB COLOR) BRIGHT-C(BRIGHTNESS) SHARP-C(SHARPNESS)

VARIABLE

DATA RANG

0 ~ 127 43 ” P-IN-P adjusted

0 ~ 127 55 RF signal input (TUNER-B) P-IN-P adjusted

0 ~ 15 11 11 ” ” 0 ~ 31 20 13 Component signal input VCJ IC (IC401) adjusted

0 ~ 31 15 3 ” ” 0 ~ 101 58 ” ” 0 ~ 27 0 0 ” ”

INITIAL

VALUE

FIXED

VALUE

INPUT CONDITIONS

CONTROL DESTINATION

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

27L-S500,27L-X2000 CL27S50,CL27X200

SERVICE

NUMBER

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

ADJUSTMENT ITEM

RANGE

27L-S500, CL27S50 27L-X2000,CL27X200

ADJUSTMENT CONTENTS

Table - B

Holding down both the CH-up/down buttons on the TV set at service mode for more than 2 seconds will automatically write the above initial values into IC1501.

PART REPLACED

IC2001

IC401

ADJUSTMENT

NECESSARY

UNNECESSARY

Data is stored in IC1501.

The adjustment is needed to compensate for characteristics of parts including IC401.

NOTES

IC1501

CRT

IC3001

IC1801

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 picture tube only.

Adjust items related to MTS only (M01~M05).

Adjust items related to P-IN-P only (P01~P07).

Table - C

SERVICE ADJUSTMENT

27L-S500,27L-X2000 CL27S50,CL27X200

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. Set the S21 bus data to "01" to get the Y signal 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 the Y signal mute.

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. Set the S21 bus data to "01" to get the Y signal 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.

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 value to obtain normal 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 the customer color control is set to center position .

3. Enter the service mode and select service adjustment "S1 1".

4. Adjust "S1 1" data value to obtain normal color level.

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.

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 value so that text box is positioned in the center of the screen.

Vertical Phase Adjustment

1. Enter the service mode and select the service adjustment "S14".

2. Adjust data value to "00".

Note: This must be set "00" when changed data retrace

line will appear.

Figure B.

27L-S500,27L-X2000 CL27S50,CL27X200

MTS 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 counter to pin (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 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 and select service adjustment "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 and select service adjustment "P07".

3. Adjust data value to "11".

27L-S500,27L-X2000 CL27S50,CL27X200

MODELS 27L-S500, CL27S50 CHASSIS LAYOUT

PWB-B

PWB-K

PWB-H

PWB-R

87109654321

27L-S500,27L-X2000 CL27S50,CL27X200

PWB-A

1716 1918151413121110

27L-S500,27L-X2000 CL27S50,CL27X200

MODELS 27L-X2000, CL27S200 CHASSIS LAYOUT

PWB-B

PWB-K

PWB-H

PWB-L

PWB-R

87109654321

PWB-A

27L-S500,27L-X2000 CL27S50,CL27X200

1716 1918151413121110

27L-S500,27L-X2000 CL27S50,CL27X200

MODELS 27L-S500, CL27S50 BLOCK DIAGRAM

87109654321

+ 44 hidden pages