Sony scd 1 777 es service manual
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Extracted text from sony scd 1 777 es service manual (Ocr-read)
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2 Notes on chip component replacement ¥ Never reuse a disconnected chip component. ¥ Notice that the minus side of a tantalum capacitor may be dam- aged by heat. Flexible Circuit Board Repairing ¥ Keep the temperature of the soldering iron around 270 ûC dur- ing repairing. ¥ Do not touch the soldering iron on the same conductor of the circuit board (within 3 times). ¥ Be careful not to apply force on the conductor when soldering or unsoldering. ATTENTION AU COMPOSANT AYANT RAPPORT Ë LA SƒCURITƒ! LES COMPOSANTS IDENTIFIƒS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHƒMATIQUES ET LA LISTE DES PIéCES SONT CRITIQUES POUR LA SƒCURITƒ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIéCES SONY DONT LES NUMƒROS SONT DONNƒS DANS CE MANUEL OU DANS LES SUPPLƒMENTS PUBLIƒS PAR SONY. SAFETY-RELATED COMPONENT WARNING!! COMPONENTS IDENTIFIED BY MARK 0 OR DOTTED LINE WITH MARK 0 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous ra- diation exposure. Laser component in this product is capable of emitting radiation exceeding the limit for Class 1. The following caution label is located inside the unit.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, ÒmetallizedÓ knobs, screws, and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE TEST 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 microamperes.). 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 manufacturersÕ 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 ÒlimitÓ 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) 1.5 k W 0.15 µF AC voltmeter (0.75 V) To Exposed Metal Parts on Set Earth Ground The following caution label is located inside of the unit. For the customers in Canada CAUTION TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG WITH AN EXTENSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE. For the customers in Europe This appliance is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT MARKING is located on the rear exterior. Fig. A. Using an AC voltmeter to check AC leakage.
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3 SECTION 3 SERVICING NOTES 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. MODEL IDENTIFICATION NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT Part No. – Back Panel – Model Par t No. SCD-1: US, Canadian 4-215-784-1 s SCD-1: AEP 4-215-784-2 s SCD-777ES: AEP 4-221-854-0 s SCD-777ES: US, Canadian 4-221-854-1 s CHECKING METHOD OF MICROCOMPUTER ROM VERSION 1. Set the CD1/CD2 switch on the remote commander to CD1. 2. With the power turned on, press the [CHECK] button on the remote commander while pressing the [TEXT] button on the set. 3. 15-digit numeric value will be displayed, and the top 4 digits (left side) of the numeric value imply the microcomputer ROM version. Example: If Ò200006100FFFF3CÓ is displayed, the ROM ver- sion is 2.000. 4. To cancel the ROM version check mode, press the [CHECK] button on the remote commander while pressing the [TEXT] button on the set. DISPLAY OF TOC ERROR insulatorOP mechanism section (BU-23) Any board to pu t connect two jigs (extension cable J-2501-164-A) to the RF board (CN001, 002) and Main board (CN501, 502). SERVICE POSITION In checking the BU section, prepare two new jigs (extension cable J-2501-164-A: 1.00 mm 26 cores). Display Contents TOC ERROR **** Illegal SACD disc (pirate edition) TOC ERROR * Not SACD (DVD disc etc.)