SHARP 27R-S200, 27R-S400, 27R-S450, CR27S20, CSR20027 Service Manual

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

SERVICE MANUAL

S61W327R-S200

COLOR TELEVISION

Chassis No. MS-B

27R-S200, 27R-S400 27R-S450, CR27S20

MODELS

In the interests of user-safety (Required by saf ety regulations in some countries ) the set should be restored to its original condition and only parts identical to those specified should be used.

CSR20027

CONTENTS

Page

» ELECTRICAL SPECIFICATIONS .........................................................................................................1

» IMPORTANT SERVICE SAFETY PRECAUTION ................................................................................. 2

» LOCATION OF USER'S CONTROL .....................................................................................................6

» INSTALLATION AND SERVICE INSTRUCTIONS ................................................................................8

» SERVICE ADJUSTMENT ...................................................................................................................12

» CHASSIS LAYOUT .............................................................................................................................15

» BLOCK DIAGRAM ..............................................................................................................................17

» SCHEMATIC DIAGRAMS ...................................................................................................................20

» PRINTED WIRING BOARD ASSEMBLIES ........................................................................................40

» REPLACEMENT PARTS LIST ............................................................................................................45

» PACKING OF THE SET ......................................................................................................................59

ELECTRICAL SPECIFICATIONS

POWER INPUT..................................................... 120V AC 60 Hz

POWER RATING .................................................................. 126W

PICTURE SIZE ........................................ 2,193.5cm2 (339sq 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 .............. 3.0W + 3.0W (at 10% distortion and

Dual CH Operate)

SPEAKER

SIZE ....................................................Round type 8 cm (2 pcs.)

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.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

Service work should be performed only by qualified service technicians who are thoroughly 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. 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 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 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-RADIATION AND HIGH VOLTA GE 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. Howe ver , 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 ser vicemen 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 excessiv e high voltage, av oid being unnecessarily close to the receiver. Do not operate the receiver longer than is necessary to locate the cause of excessive voltage.

IMPORTANT SERVICE SAFETY PRECAUTION

1.5k ohm 10W

0.15µF

TEST PROBE

TO EXPOSED METAL PARTS

CONNECT TO KNOWN EARTH GROUND

(Continued)

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

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, 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 ha ving with 5000 ohm per volt, or higher, sensitivity to measure the A C v oltage 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, etc.) and measure the AC voltage drop across the resistor. AII checks must be repeated with the AC line 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.

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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, etc. 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.

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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.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

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 PAR 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 cor den 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 mesurab les 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 peuv ent entrer dans l'env eloppe 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-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.

27R-S200, 27R-S400

2 2

27R-S450, CR27S20 CSR20027

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 av ec 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 5000Ω/V pour mesurer la chute de tension en travers de la résistance.

• T oucher av ec 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.) 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.

Voltmètre CA

1.5k ohm 10W

0.15µF

SONDE D'ESSAI

AUX PIECES METALLIQUES EXPOSEES

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BRANCHER A UNE TERRE CONNUE

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

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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.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

LOCATION OF USER'S CONTROL

(27R-S200, CSR20027, CR27S20)

Front Panel

POWER.

Press → On. Press again → Off.

MENU.

Press → Accesses MAIN MENU. Press again →

Exits MAIN

MENU.

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/DO WN

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

• In menu mode, changes or selects the TV adjustments.

Press → Accesses MAIN MENU. Press again → Exits MAIN MENU.

CATV/DVD-TV/VCR MODE SELECT SWITCH

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

DVD/VCR CONTROL

SENSOR AREA FOR REMOTE CONTROL

POWER

DVD

DISPLAY

VCR

1 2 3 4 5 6 7 8 9

FLASHBACK

PERSONAL PREFERENCE

A B C D

VOL

—

MENU MUTE

REW PLAY FF

PA USE

TV • CATV • VCR • DVD

STOP REC

ENTER

100

VOL

CATV TV

DVD VCR

CH/SKIP

INPUT

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.

• Press both at the same time to access the MAIN MENU screen.

VOLUME UP/DO WN

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

Infrared Transmitter Window

DISPLAY

Press → Displa ys receiving channel for four seconds. Press again → Removes display.

• Temporarily displays receiving channel when in Closed Caption mode.

INPUT

Press → Switch to external video INPUT 1 mode. Press 2 times → Switch to external video INPUT 2 mode. Press 3 times → Switch to external COMPONENT mode. Press 4 times → Switch back to the original TV mode.

ENTER

Used in some instances where a 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.

MUTE

Press → Mutes sound. Press again → Restores sound.

• CLOSED CAPTION appears when sound is muted.

LOCATION OF USER'S CONTROL (Continued)

(27R-S400, 27R-S450)

Front Panel

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

POWER

Press → On. Press again → Off.

MENU.

Press → Accesses MAIN MENU. Press again →

Exits MAIN

MENU.

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/DO WN

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

• In menu mode, changes or selects the TV adjustments.

Press → Accesses MAIN MENU. Press again → Exits MAIN MENU.

CATV/DVD-TV/VCR MODE SELECT SWITCH

DVD/VCR CONTROL

SENSOR AREA FOR REMOTE CONTROL

POWER

DVD VCR

DISPLAY

1 2 3 4 5 6 7 8 9

FLASHBACK

ENTER

PERSONAL PREFERENCE

A B C D

VOL

—

MENU MUTE

CATV TV

DVD VCR

REW PLAY FF

PA USE

STOP REC

PIP

SWAP FREEZE MOVE SELECT

TV • CA TV • VCR • DVD

100

VOL

CH/SKIP

INPUT

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.

• Press both at the same time to access the MAIN MENU screen.

VOLUME UP/DO WN

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

Infrared Transmitter Window

DISPLAY

Press → Displa ys receiving channel for four seconds. Press again → Removes display.

• Temporarily displays receiving channel when in Closed Caption mode.

INPUT

Press → Switch to external video INPUT 1 mode. Press 2 times → Switch to external video INPUT 2 mode. Press 3 times → Switch to external COMPONENT mode. (27R-S450 only) Press 4 times → Switch back to the original TV mode.

ENTER

Used in some instances where a 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.

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.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

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.

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 TP651 and make sure that the voltmeter reads 13.2 ±0.7V.

5. Apply external 16.3V DC at TP651 by using an external DC supply, TV must be shut off.

6. To reset the protector, unplug the AC cord and plug the AC cord power on. 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 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 "V18" and Bus data "01" (Y -m ute on, CRT Cut Off).

4. The voltage should be approximately 29.0kV (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.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

For adjustments of this model, the bus data is conver ted 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-B" 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 "V01" to "P08". Select the item you wish to adjust.

3. Data number selection

Press the V ol-up or V ol-down button to adjust the data number.

DATA NUMBER

SERVICE ADJUSTMENT NUMBER

To enter the ser vice mode and exit service mode.

To enter the service mode manually just press and hold the Vol-down and Ch-up buttons at the same time, 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.

CHANNEL

V01

Figure A.

55(085)

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

SERVICE

NUMBER

V01 PICTURE 03 0-15(00h-0Fh) V02 TINT 3E 0-127(00h-7Fh) V03 COLOR 2D 0-127(00h-7Fh) V04 SUB-COLOR 10 0-31(00h-1Fh) Must be set to "10" V05 BRIGHT 4D 0-127(00h-7Fh) V06 R CUT-OFF 40 64-255(40h-FFh) V07 G CUT-OFF 40 64-255(40h-FFh) V08 B CUT-OFF 40 64-255(40h-FFh) V09 G DRIVE 40 0-127(00h-7Fh) V10 B DRIVE 40 0-127(00h-7Fh) V11 SHARP 14 0-63(00h-3Fh) Must be set to "1E" V12 N PHASE 01 0-3(00h-03h) Must be set to "01" V13 DC RESTORATION 00 0-3(00h-03h) Must be set to "00" V14 BLACK STRETCH 03 0-3(00h-03h) Must be set to "03" V15 ABL START POINT 03 0-3(00h-03h) Must be set to "03" V16 ABL GAIN 02 0-3(00h-03h) Must be set to "02" V17 γ POINT 00 0-3(00h-03h) Must be set to "00" V18 Y-MUTE/V-STOP 00 0-2 "00"= Nomal, "01"= No-Y, "02"= No-Y & No-Vertical V19 ENERGY SAVE 28 0-63(00h-3Fh) Must be set to "28" V20 RTONE-G F6 0-255(00h-FFh) Must be set to "F6" V21 RTONE-B F6 0-255(00h-FFh) Must be set to "F6" V22 BTONE-G 00 0-255(00h-FFh) Must be set to "00" V23 BTONE-B 0A 0-255(00h-FFh) Must be set to "0A" V24 LOW-G F7 0-255(00h-FFh) Must be set to "F7" V25 LOW-B E8 0-255(00h-FFh) Must be set to "E8" V26 ML-G 00 0-255(00h-FFh) Must be set to "00" V27 ML-B F9 0-255(00h-FFh) Must be set to "F9" V28 HIGH-G 03 0-255(00h-FFh) Must be set to "03" V29 HIGH-B 06 0-255(00h-FFh) Must be set to "06" V30 WPS 01 0-1 Must be set to "01" V31 RGB CONTRAST 20 0-63(00h-3Fh) Must be set to "2A" V32 Y-DL 02 0-7(00h-07h) Must be set to "02" V33 Y-DL-INPUT 01 0-7(00h-07h) Must be set to "01" V34 VSM GAIN 07 0-7(00h-07h) Must be set to "07" V35 N COMB 01 0-1 Must be set to "01" V36 BPF/TOF-INPUT 00 0-1 Must be set to "00" V37 CORING 00 0-1 Must be set to "00" V38 VSM PHASE 00 0-1 Must be set to "00" V39 COLOR γ 00 0-1 Must be set to "00" V40 SHARP-INPUT 14 0-63(00h-3Fh) Must be set to "1E" V41 TINT-INPUT 3E 0-127(00h-7Fh) V42 PICTURE-COMPONENT 03 0-15(00h-0Fh) V43 TINT-COMPONENT 10 0-31(00h-1Fh) Must be set to "10" V44 COLOR-COMPONENT 30 0-127(00h-7Fh) Must be set to "35" V45 BRIGHT-COMPONENT 4A 0-127(00h-7Fh) V46 R CUT OFF-COMPONENT 40 64-255(40h-FFh) V47 G CUT OFF-COMPONENT 40 64-255(40h-FFh) V48 B CUT OFF-COMPONENT 40 64-255(40h-FFh) V49 G DRIVE-COMPONENT 40 0-127(00h-7Fh) V50 B DRIVR-COMPONENT 40 0-127(00h-7Fh) V51 SHARP COMPONENT 14 0-63(00h-3Fh) Must be set to "1E" V52 N PHASE-COMPONENT 01 0-3(00h-03h) Must be set to "01" V53 C-TRAP 00 0-1 Must be set to "00"

ADJUSTMENT ITEM

INITIAL VALUE

DATA

ADJUSTMENT CONTENTS

RANGE

R01 RF-AGC 24 0-63(00h-3Fh) R02 PIF VCO coil – – — R03 RF-AGC REF 5C 0-255(00h-FFh) Must be set to "5C"

D01 V POSITION 00 0-7(00h-07h) D02 H POSITION 10 0-31(00h-1Fh) D03 V SIZE 12 0-63(00h-3Fh) Must be set to "0B" D04 H SIZE 1F 0-63(00h-3Fh) D05 V-LINEARITY 07 0-15(00h-0Fh) D06 V-S CORRECTION 08 0-15(00h-0Fh) Must be set to "08" D07 EW PARABOLA 21 0-63(00h-3Fh) Must be set to "21" D08 EW TRAPEZIUM 0E 0-31(00h-1Fh) Must be set to "0E" D09 EW CORNER 0C 0-15(00h-0Fh) Must be set to "0C" D10 AFC GAIN 02 0-3(00h-03h) Must be set to "02" D11 V EHT 07 0-7(00h-07h) Must be set to "07" D12 H EHT 03 0-7(00h-07h) Must be set to "03"

Table - A

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

SERVICE

NUMBER

EX1 FAO VOLUME 24 0-50(00h-32h) Must be set to "24" EX2 CC-POSITION 21 0-127(00h-7Fh) EX3 INT 7A 0-255(00h-FFh) Must be set to "7A" EX4 A-ATT 5A 0-127

OP1 OPTION1 BA 0-255(00h-FFh) Must be set to "B4"= (27R-S200, CSR20027, CR27S20), OP2 OPTION2 01 0-7(00h-07h) Must be set to "01" M01 INPUT LEVEL 09 0-15(00h-0Fh) Must be set to "09"

M02 MTS VCO 24 0-63(00h-3Fh) M03 FILTER 1F 0-63(00h-3Fh) M04 WIDEBAND 18 0-63(00h-3Fh) M05 SPECTRAL 10 0-63(00h-3Fh)

P01 CONTRAST-PIP 32 0-127(00h-7Fh) P02 TINT-PIP 29 0-63(00h-3Fh) Must be set to "29" P03 COLOR-SAT-PIP 32 0-127(00h-7Fh) P04 Y-OFFSET-PIP 09 0-31(00h-1Fh) Must be set to "09" P05 HXA-PIP 0A 0-255(00h-FFh) Must be set to "0A" P06 HADJ-PIP 00 0-15(00h-0Fh) Must be set to "00" P07 FREE RUN-PIP 0B 0-15(00h-0Fh) Must be set to "0B" P08 TINT-PIP-INPUT 24 0-63(00h-3Fh) Must be set to "24"

ADJUSTMENT ITEM

INITIAL VALUE

DATA

ADJUSTMENT CONTENTS

RANGE

"B2"= (27R-S400), "B6"= (27R-S450)

Table - A

Holding down both the VOL-up and CH-up buttons on the TV set at service mode for more than 2 seconds will automatically write the above initial values into IC2102.

PART REPLACED

IC2001 IC201

IC2102

CRT IC3001

IC1801

NECESSARY UNNECESSARY

ADJUSTMENT

X X X

NOTES

Data is stored in IC2102. The adjustment is needed to compensate for characteristics of parts

including IC201 and MTS level (M01). Holding down both the VOL-up and CH-up buttons on the TV set in

the service mode for more than 2 seconds will automatically write the above initial values into IC2102. 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~P08).

Table - B

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

SERVICE ADJUSTMENT

VCO Adjustment

1. Connect a digital voltmeter between pin (55) of IC201 and ground.

2. Receive a good local channel.

3. Enter the service mode and select the service adjustment "R02".

4. Adjust T201 so that digital voltmeter reads

2.5±1.0VDC.

5. Adjustment is completed, remove the voltmeter, return to "normal" mode.

RF AGC Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "R01".

3. Set the data value to point where no noise or beat appears.

4. Select another channel to confirm that no noise or beat appears. Note 1 : You will have to come out of the service

mode to select another channel.

Note 2 : Setting the data to "00" will produce a black

raster.

Screen Adjustment

White Balance Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "V03" and set to "00" (minimum color)(Record original data code under adjustment "V03" before changing). "V03" does not have to be adjusted, if you selected a B/W picture or monoscope pattern.

3. Alternately adjust the service adjustment data of "V09" and "V10" until a good grey scale with normal whites is obtained. (RF Input)

4. For component input, the data value of "V49" and "V50" is adjusted to follow the data value of "V09" and "V10" respectively.

5. Select the service adjustment "V03" and reset data to obtain normal color level.

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 "V01".

4. Adjust the data value to achieve normal contrast range.

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "V03" and set the data value to "00" to set the color level to minimum. (Record original data code under adjustment "V03" before changing) You may skip this step, if you selected a B/W picture or monoscope pattern.

3. Select the service adjustment "V18" and adjust the data value to "01", this turn off the luminance signal (Y-mute).

4. Adjust the master screen control until the raster darkens to the point where raster is barely seen.

5. Adjust the service adjustments "V06" red, "V07" green and "V08" blue to obtain a good grey scale with normal whites at low brightness level.

6. Select the service adjustment "V18" and reset data to "00". Select the service adjustment "V03" and reset data to obtain normal color level.

7. For component input, the data value of "V46" red, "V47" green and "V48" blue is adjusted to follow the data value of "V06", "V07" and "V08" respectively.

8. Reset the master screen control to obtain normal brightness range.

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 "V02".

4. Adjust "V02" data value to obtain normal flesh tones.

5. Input same data to "V41".

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 "V04".

4. Adjust "V04" data value to obtain normal color level.

Brightness Adjustment

1. 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 "V05".

4. Adjust "V05" data value to obtain normal brightness level.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

Vertical-Size and Linearity Adjustments

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D03" for V-size.

3. Adjust the "D03" bus data to get the proper V-size.

4. For V -linearity adjustment, select data bus "D05" and adjust to get the proper vertical linearity. Note: Aging for 10 min before adjustment. After the

adjustment of V-center and V-size, readjustment for this V-line.

Vertical Phase Adjustment

1. Enter the service mode and select the service adjustment "D01".

2. Adjust "D01" data value so that picture is centered.

Horizontal Position Adjustment

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "D02".

3. Adjust "D02" data value so that picture is centered.

Caption Position Adjustment (Horizontal)

Other Adjustments

1. Enter the service mode.

2. Adjust the following data values as listed below.

DATA(Hex)

SERVICE ADJUST 27R-S200,

POSITION ITEM CSR20027,

CR27S20 OP1 OPTION1 B4 B2 B6 OP2 OPTION2 01 01 01

27R-S400 27R-S450

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "EX2".

3. A black text box appears on the screen. (see

below)

Figure

4. Adjust "EX2" data value so that text box is positioned in the center of the screen.

Figure B.

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

MTS ADJUSTMENT

MTS Level Adjustment

1. Receive the following composite signal. Monaural signal: 400Hz, 100% modulation

2. Connect the rms voltmeter to pin (39) of IC3001.

3. Enter the service mode and select the service adjustment "M01" and set to "09".

4. Enter the service mode and select the service adjustment "EX4".

5. Adjust the data so that the rms voltmeter reads 490 ±10 mVrms.

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

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 until "OK" appears in position on the screen. Make sure the "OK" is displayed almost at the center of the data range.

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 7 again for fine adjustment.

P-IN-P ADJUSTMENT

(Only for 27R-S400, 27R-S450)

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 "29".

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 the 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 "0A".

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 FREERUN

1. Receive a good local channel.

2. Enter the service mode and select the service adjustment "P07".

3. Adjust data value to "0B".

654321

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

MODELS 27R-S200, CSR20027, CR27S20 CHASSIS LAYOUT

27R-S200, 27R-S400 27R-S450, CR27S20 CSR20027

MODELS 27R-S400, 27R-S450 CHASSIS LAYOUT

654321

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