Sony KV-27S42 service manual SELF-DIAGNOSTIC Function, SAFETY-RELATED Component Warning

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KV-27S42/27S46/27S66/29AL42/29AL42C/29AL66/ 29AL66C/29SL42/29SL42C/29SL46/29XL42M

WARNINGS AND CAUTIONS

CAUTION

ATTENTION!!

SHORT CIRCUIT THE ANODE OF THE PICTURE TUBE AND THE ANODE CAP TO THE METAL CHASSIS, CRT SHIELD, OR CARBON PAINTED ON THE CRT, AFTER REMOVING THE ANODE.

WARNING!!

AN ISOLATION TRANSFORMER SHOULD BE USED DURING ANY SERVICE TO AVOID POSSIBLE SHOCK HAZARD, BECAUSE OF LIVE CHASSIS. THE CHASSIS OF THIS RECEIVER IS DIRECTLY CONNECTED TO THE AC POWER LINE.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY SHADING AND MARK ON THE SCHEMATIC DIAGRAMS, EXPLODED VIEWS, AND IN THE PARTS LIST ARE CRITICAL FOR SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. CIRCUIT ADJUSTMENTS THAT ARE CRITICAL FOR SAFE OPERATION ARE IDENTIFIED IN THIS MANUAL. FOLLOW THESE PROCEDURES WHENEVER CRITICAL COMPONENTS ARE REPLACED OR IMPROPER OPERATION IS SUSPECTED.

ATTENTION

APRES AVOIR DECONNECTE LE CAP DE L'ANODE, COURT-CIRCUITER L'ANODE DU TUBE CATHODIQUE ET CELUI DE L'ANODE DU CAP AU CHASSIS METALLIQUE DE L'APPAREIL, OU AU COUCHE DE CARBONE PEINTE SUR LE TUBE CATHODIQUE OU AU BLINDAGE DU TUBE CATHODIQUE.

ATTENTION!!

AFIN D'EVITER TOUT RESQUE D'ELECTROCUTION PROVENANT D'UN CHÁSSIS SOUS TENSION, UN TRANSFORMATEUR D'ISOLEMENT DOIT ETRE UTILISÉ LORS DE TOUT DÉPANNAGE. LE CHÁSSIS DE CE RÉCEPTEUR EST DIRECTEMENT RACCORDÉ À L'ALIMENTATION SECTEUR.

ATTENTION AUX COMPOSANTS RELATIFS A LA SECURITE!!

LES COMPOSANTS IDENTIFIES PAR UNE TRAME ET PAR UNE MARQUE SUR LES SCHEMAS DE PRINCIPE, LES VUES EXPLOSEES ET LES LISTES DE PIECES SONT D'UNEIMPORTANCE CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT. NE LES REMPLACER QUE PAR DES COMPOSANTS SONY DONT LE NUMERO DE PIECE EST INDIQUE DANS LE PRESENT MANUEL OU DANS DES SUPPLEMENTS PUBLIES PAR SONY. LES REGLAGES DE CIRCUIT DONT L'IMPORTANCE EST CRITIQUE POUR LA SECURITE DU FONCTIONNEMENT SONT IDENTIFIES DANS LE PRESENT MANUEL. SUIVRE CES PROCEDURES LORS DE CHAQUE REMPLACEMENT DE COMPOSANTS

CRITIQUES, OU LORSQU'UN MAUVAIS FONTIONNEMENT SUSPECTE.

SELF-DIAGNOSTIC FUNCTION

The units in this manual contain a self-diagnostic function. If an error occurs, the STANDBY/TIMER LED will automatically begin to flash. The number of times the LED flashes translates to a probable source of the problem. A definition of the STANDBY/TIMER LED flash indicators is listed in the instruction manual for the user’s knowledge and reference. If an error symptom cannot be reproduced, the Remote Commander can be used to review the failure occurrence data stored in memory to reveal past problems and how often these problems occur.

Diagnostic Test Indicators

When an error occurs, the STANDBY/TIMER LED will flash a set number of times to indicate the possible cause of the problem. If there is more than one error, the LED will identify the first of the problem areas.

Results for all of the following diagnostic items are displayed on screen. No error has occurred if the screen displays a “0”.

Diagnostic Item

No. of times

Display/

Probable Cause

Detected

Description

STANDBY/TIMER

Diagnostic result

Location

Symptoms

 

lamp flashes

 

 

 

 

 

 

 

 

* Power does not turn on

Does not light

 

* Power cord is not plugged in.

* Power does not come on.

 

 

 

* Fuse is burned out (F5050) (E Board)

* No power is suppled to the TV.

 

 

 

 

* AC power supply is faulty.

 

 

 

 

 

* +B overcurrent (OCP)

2 times

2:0 or 2:1

* H.OUT (Q502) is shorted. (A board)

* Power does not come on.

 

 

 

* IC1751 is shorted. (C board)

* Load on power line is shorted.

 

 

 

* IC1701 is shorted. (CV board)

 

* Vertical deflection

4 times

4:0 or 4:1

* +13V is not supplied. (A board)

* Has entered standby state after

stopped*

 

 

 

horizontal raster.

 

 

 

* IC 541 is faulty (A board)

* Vertical deflection pulse is stopped.

 

 

 

 

* Power line is shorted or power supply

 

 

 

 

is stopped.

 

 

 

 

 

* White balance failure

5 times

5:0 or 5:1

* Video OUT (Q306 to 308) is faulty.(A bd)

* No raster is generated.

(not balanced)

 

 

* IC301 is faulty. (A board)

* CRT cathode current detection

 

 

 

* G2 is improperly adjusted**.

reference pulse output is small.

 

 

 

 

 

 

 

 

 

 

*If a +B overcurrent is detected, stoppage of the vertical deflection is detected simulatneously. The symptom that is diagnosed first by the microcontroller is displayed on the screen.

**Refer to Screen (G2) Adjustment in Section 3-4 of this manual.

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Contents BA-4DCHASSIS Trinitron Color TV Standby DimensionsW/H/D SpecificationsTable of Contents SAFETY-RELATED Component Warning SELF-DIAGNOSTIC Function101 STANDBY/TIMER LEDSelf-diagnostic Circuit Leakage Test Safety CHECK-OUTSection General Connecting Your TVKV-27S42/27S46/27S66/29AL42/29AL42C/29AL66 Troubleshooting Rear Cover Removal DisassemblySection Service Position Chassis Assembly RemovalAnode CAP Removal Picture Tube RemovalAdjustment Procedure Section SET-UP AdjustmentsBeam Landing Purity ControlConvergence Dynamic Convergence AdjustmentVertical Static Convergence Horizontal Static ConvergenceWhite Balance Adjustments Method of Setting the Service Adjustment ModeHold-down Readjustment Section Safety Related AdjustmentsB+ Voltage Confirmation and Adjustment Preparation Before ConfirmationFBT ABL11 Setting the Service Adjustment Mode Section Circuit AdjustmentsService Adjustment Mode On Adjust Buttons and IndicatorsService Data Initial Value Average Data Name Range Adjustment ItemsBoard Adjustments Size Adjustment Vsiz Sub Hue, Sub Color Adjustment SHUE, ScolCenter Adjustment Vpos Center Adjustment HposPrinted Wiring Boards and Schematic Diagrams Section Diagrams Block DiagramPart Replaced Adjustment Circuit Board LocationBoard * Mark Variant List Board IC Voltage List Board Schematic Diagram Board WaveformsBoardtransistor Board Schematic Diagram Board Schematic Diagram Board * Mark Variant List Board ICHT Board Schematic Diagram Component Side Board WaveformsBoard Transistor Voltage List CV Board Transistor CV Board IC Voltage ListCV Board Waveforms Semiconductors HV Board Schematic Diagram Board IC Voltage ListSection Exploded Views IC1403Beznet Assy KV-29XL42M Emblem NO.9, SonyMulti Button GUIDE, LEDDY Y29NXA-V Beznet AssyCV Mounted PC Board Piece a 110, Conv CorrectCABLE, P-P CORD, Power with Connector25 A-1372-617-A HV VAR Mounted PC Board Model Capacitor Common Parts Listing aCommon Parts Listing Diode ConnectorJack Ferrite BeadChip Conductor CoilQ300 ResistorTransistor 2SD601A-Q Transistor 2SA1091-OREF.NO. Part no Carbon MetalRelay SwitchTransformer RES, ChipCrystal ThermistorTuner Connector Transformer Board Variant Parts ListDiode Thermistor LINK, IC400V Diode Transformer560µF 680µF KV-27S46KV-29SL46 Connector SwitchIC STR-F6626 Board Variant List KV-27S66RES,CHIP Board Variant List KV-29AL42/29AL42C Transformer CapacitorTHP601 ! 1-803-540-11 Thermistor Jack Transformer Board Variant List KV-29AL66/29AL66CTransistor Thermistor R391J1751 ! 1-251-688-11 SOCKET, CRT 0022µF J1701125V KV-27S42/27S46/27S66 onlyVaristor FuseHV K REF.NO. Part NO. Descriptionremark C3301 Remote Commander Accessories and Packing MaterialPage Page 965-857-01 Sony CorporationCORRECTION-1 CRT 29NX 733-873-05DYY29VXA-V2 IncorrectCorrect SUPPLEMENT-1 Chassis KV-27S46/27S42/29SL42/29SL42C/29SL46/29XL42M/29SL43 SUPPLEMENT-2 Beznet Assy KV-29XL42M Correction
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KV-27S42 specifications

The Sony KV-27S42, KV-27S66, and KV-27S46 are notable models within Sony's acclaimed line of Trinitron televisions, which contributed significantly to the brand's reputation for delivering high-quality viewing experiences. These models are characterized by their sturdy construction, vibrant picture quality, and user-friendly features, which made them popular among consumers during their release.

The KV-27S42 model is equipped with Sony's advanced Trinitron technology, offering a flat CRT screen that minimizes glare and enhances color accuracy. With a 27-inch display size, the KV-27S42 is designed to provide an immersive viewing experience without occupying excessive space in the living room. This model also features a variety of input options including composite, S-video, and RF inputs, allowing users to connect multiple devices such as VCRs, DVD players, and gaming consoles effortlessly.

The KV-27S66 model builds upon the strengths of its predecessor with enhancements in audio and video technologies. It features a built-in 2-channel sound system that delivers clear and dynamic audio, complementing the stunning visuals produced by the Trinitron display. The KV-27S66 also includes a digital comb filter, which improves picture sharpness by separating the brightness and color signals, resulting in reduced artifacts and enhanced clarity.

Meanwhile, the KV-27S46 incorporates some of the latest technologies of its time, such as the use of Super Fine Pitch Trinitron technology. This innovation enhances the display's resolution, offering finer detail and more precise color reproduction. The KV-27S46 also supports multiple viewing formats, making it suitable for various video sources, including standard cable and DVDs.

Each of these models is designed with an intuitive on-screen menu that simplifies the navigation of settings, making it easy for users to adjust picture and sound settings to their preferences. Remote control functionality further enhances the user experience, allowing for effortless operation from a distance.

In summary, the Sony KV-27S42, KV-27S66, and KV-27S46 televisions stand out for their historical significance in delivering quality display and audio technologies. With various features that cater to home entertainment needs, these televisions remain a testament to Sony's lasting legacy in the consumer electronics market. While these models may not compete with today's flat-screen technology, they were pioneering products that set the stage for future innovations in television design and performance.
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