Sony icf cd 830 service manual
This is the 54 pages manual for sony icf cd 830 service manual.
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2 ICF-CD830/CD830L TABLE OF CONTENTS 1. GENERAL ········································································ 4 2. DISASSEMBLY 2-1. UPPER CASE ······························································· 5 2-2. KEY BOARD ································································ 5 2-3. TRANSFORMER BOARD ··········································· 6 2-4. MAIN CHASSIS ··························································· 6 2-5. OPTICAL PICK-UP BLOCK (KSM-213CDM) ·········· 6 3. TEST MODE······························································· 7 4. ELECTRICAL ADJUSTMENTS····························· 9 5. DIAGRAMS 5-1. CIRCUIT BOARDS LOCATION ······························· 10 5-2. BLOCK DIAGRAM (CD830) ···································· 11 5-3. BLOCK DIAGRAM (CD830L) ·································· 12 5-4. SCHEMATIC DIAGRAM – TUNER SECTION (CD830) – ································· 13 5-5. SCHEMATIC DIAGRAM – TUNER SECTION (CD830L) – ······························ 14 5-6. SCHEMATIC DIAGRAM – CD SECTION – ······················································· 15 5-7. SCHEMATIC DIAGRAM – POWER SECTION – ··············································· 16 5-8. PRINTED WIRING BOARD – MAIN SECTION – ·················································· 17 5-9. PRINTED WIRING BOARD – KEY/POWER SECTION – ······································ 18 5-10. SCHEMATIC DIAGRAM – KEY SECTION – ····················································· 19 5-11. IC BLOCK DIAGRAMS ············································ 20 5-12. IC PIN FUNCTION DESCRIPTION ························· 22 6. EXPLODED VIEWS 6-1. CABINET SECTION ·················································· 23 6-2. CHASSIS SECTION ··················································· 24 6-3. OPTICAL PICK-UP SECTION (KSM-213CDM) ························································· 25 7. ELECTRICAL PARTS LIST································· 26 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.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 PUBLISHED BY SONY. SAFETY CHECK-OUT After correcting the original service problem, perform the following 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 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 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 indication is 0.75 V, so analog meters must have an accurate low-voltage scale. The Simpson 250 and Sanwa SH-63Trd are examples of a passive VOM that is suitable. Nearly all battery operated digital multimeters that have a 2 V AC range are suitable. (See Fig. A) Fig. A. Using an AC voltmeter to check AC leakage. Note 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. 1.5 k Ω 0.15 µF AC voltmete r (0.75 V) To Exposed Metal Parts on Set Earth Ground
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3 ICF-CD830/CD830L The laser diode in the optical pick-up block may suffer electrostatic 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 emission, observe from more than 30 cm away from the objective lens.NOTES ON HANDLING THE OPTICAL PICK-UP BLOCK OR BASE UNIT CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. This Compact Disc player is classified as a CLASS 1 LASER product. The CLASS 1 LASER PRODUCT label is located on the bottom exterior. CHUCK PLATE JIG ON REPAIRING On repairing CD section, playing a disc without the CD lid, use Chuck Plate Jig. -Code number of Chuck Plate Jig: X-4918-255-1 LASER DIODE AND FOCUS SEARCH OPERATION CHECK 1. Open the CD lid. 2. Turn on S401 as following figure. 3. Confirm that the laser diode emission while observing the objecting lens. When there is no emission, Auto Power Control circuit or Optical Pick-up is broken. Objective lens moves up and down once for the focus search. Insert a precision screwdriver and push S401 laser diode emission