Technicolor - Thomson CDP-CX57 service manual Safety CHECK-OUT

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SAFETY CHECK-OUT

After correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer:

Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below.

LEAKAGE

The AC leakage from any exposed metal part to earth ground and from all exposed metal parts to any exposed metal part having a return to chassis, must not exceed 0.5 mA (500 microampers.). Leakage current can be measured by any one of three methods.

1.A commercial leakage tester, such as the Simpson 229 or RCA WT-540A. Follow the manufacturers’ instructions to use these instruments.

2.A battery-operated AC milliammeter. The Data Precision 245 digital multimeter is suitable for this job.

3.Measuring the voltage drop across a resistor by means of a VOM or battery-operated AC voltmeter. The “limit” indica- tion is 0.75 V, so analog meters must have an accurate low- voltage scale. The Simpson 250 and Sanwa SH-63Trd are ex- amples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suit- able. (See Fig. A)

To Exposed Metal

Parts on Set

NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT

The laser diode in the optical pick-up block may suffer electro- static break-down because of the potential difference generated by the charged electrostatic load, etc. on clothing and the human body.

During repair, pay attention to electrostatic break-down and also use the procedure in the printed matter which is included in the repair parts.

The flexible board is easily damaged and should be handled with care.

NOTES ON LASER DIODE EMISSION CHECK

The laser beam on this model is concentrated so as to be focused on the disc reflective surface by the objective lens in the optical pick-up block. Therefore, when checking the laser diode emis- sion, observe from more than 30 cm away from the objective lens.

LASER DIODE AND FOCUS SEARCH OPERATION CHECK

Carry out the “S curve check” in ”CD section adjustment” and check that the S curve waveform is output repeatedly.

0.15∝F

AC

1.5 k Ωvoltmeter

(0.75 V)

Earth Ground

Fig. A. Using an AC voltmeter to check AC leakage.

SAFETY-RELATED COMPONENT WARNING!!

COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS

AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONENTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUB- LISHED BY SONY.

ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!

LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE !

SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

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Contents OUT SpecificationsLine OUT DigitalExcept for the customers in the United States and Canada Table of ContentsMechanical Adjustments Section Servicing NotesSafety CHECK-OUT CD-TEXT Test Disc Checking MethodRestrictions in CD-TEXT Display ′ μ Section General Location of Parts and ControlsFront Panel CASE, Front Panel Section DisassemblyAudio BOARD, Main Board CD Mechanism Deck SectionBD BOARD, Sled Motor M102 Base UnitOptical PICK-UP KSS-213B/S-N Test Mode ADJ ModeFluorescent Indicator TUBE, LED ALL LIT, and KEY Check Mode Set to this mode when returning the unit to the user Aging ModeFluorescent Indicator Tube and LED Check Mode Shipment ModeAging procedure Error DisplayError code Disc Sensor Aligment Section Mechanical AdjustmentsFlat portion center Disc Holder a Aligment Magnet Assy AligmentBalance Traverse Check Section Electrical AdjustmentsCurve Check RF Level CheckAbout RV601 on the Main board RF PLL Free-run Frequency CheckAdjustment Location Circuit Boards Location Section DiagramsSingapore model Diaplay Section IC101 $Á Rfsm Play ModeWaveforms BD Section Main SectionCDP-CX57 Block Diagrams BD Section2ND CD Main SectionPrinted Wiring Board BD Section Schematic Diagram BD Section Printed Wiring Board Audio Section See page 21 for Note Schematic Diagram Audio SectionPrinted Wiring Board Main Section Schematic Diagram Main Section Printed Wiring Boards Panel Section Schematic Diagram Panel Section Printed Wiring Boards SENSOR/MOTOR Section Page Schematic Diagram SENSOR/MOTOR Section IC102 LC78622E IC Block Diagrams BD Board IC101 LA9241MIC103 LA6541 IC104 LC89170M Main Board IC201 LA5602IC203 LA5601 Display Board IC903 M66310FP IC601 BA6780Pin No Pin Name Function IC PIN Function DescriptionSLC CV+Rfsm RFSVvdd DefiVvss IsetEflg XvddXvss SbsyTblr ResetLdin TbllSENS1 SclkSrdt Dqsy4948-515-1 Illumination Assy SectionExploded Views Case Section66 A-4724-009-A Display BOARD, Complete Front Panel SectionChassis Section Mechanism Deck CDM-46C2 354 351 355 359 354 353358 356360 357 Optical Pick UP Section KSS-213B/S-N 409406 404 403405 407 401 408 402 406 Section Electrical Parts List Audio Transformer SwitchCeramic Chip Ceramic Chip 2PFDisc Sensor R Disc Sensor S Display Ferrite Bead LED MainMain Motor Power SW Table Sensor Hardware List Accessories & Packing MaterialsCORD, Connection Control A1 CND MANUAL, Instruction SWEDISH, FINNISH, Danish AEDSony Corporation

CDP-CX57 specifications

The Technicolor - Thomson CDP-CX57 is a versatile and feature-rich compact disc player designed to enhance the listening experience for audiophiles and casual listeners alike. As part of Thomson's long-standing legacy in audio technology, the CDP-CX57 combines sleek design with advanced digital audio technologies, making it a popular choice for those seeking high-quality sound reproduction.

One of the standout features of the CDP-CX57 is its ability to support a wide range of disc formats. This player is compatible with standard audio CDs, as well as CD-R and CD-RW media, allowing users to enjoy a diverse library of music collections. Enhanced playback capabilities enable users to experience their favorite tracks with clarity and precision.

Equipped with high-performance digital-to-analog converters (DACs), the CDP-CX57 delivers rich, detailed audio reproduction. This technology transforms digital signals into analog signals, resulting in improved sound quality and a more immersive listening experience. The unit's excellent jitter suppression further ensures that audio playback remains stable and free of distortion.

The CDP-CX57 also features programmable playback options, allowing users to create custom playlists and enjoy their music in a personalized manner. Additionally, the unit comes with a user-friendly remote control, enabling effortless navigation through tracks and settings from a distance.

Built for longevity, the CDP-CX57 boasts a robust construction that protects sensitive internal components from external interference. This durability extends the player’s life and ensures optimal performance over time. Furthermore, the sleek design and compact footprint make it an attractive addition to any audio setup, fitting seamlessly into various environments.

The Technicolor - Thomson CDP-CX57 is an ideal blend of advanced technology and user-friendly features, catering to both seasoned audiophiles and those new to the world of high-fidelity audio. With its exceptional sound quality, versatile playback options, and durable design, it remains a standout choice for music lovers seeking a reliable and enjoyable listening experience.
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