Sony HCD-HX7 Service Manual - Page 2

HCD-HX3/HX5/HX7 AM tuner section: Tuning range US, Canadian models: 530 - 1,710 kHz (with 10 kHz tuning interval) 531 - 1,710 kHz (with 9 kHz tuning interval) European model: 531 - 1,602 kHz (with 9 kHz tuning interval) Other models: 530 - 1,710 kHz (with 10 kHz tuning interval) 531 - 1,602 kHz (with 9 kHz tuning interval) Antenna: AM loop antenna, external antenna terminal Intermediate frequency: 450 kHz General Power requirements US, Canadian models: 120 V AC, 60 Hz Other models: 220 - 240 V AC, 50/60 Hz Power consumption: 40 watts (HCD-HX3/HX7) 50 watts (HCD-HX5) Dimensions (w/h/d) (excl. speakers): Approx. 285 × 120 × 215 mm Mass (excl. speakers): 2.6 kg (HCD-HX3/HX7) 2.7 kg (HCD-HX5) Design and specications are subject to change without notice. Notes on chip component replacement • Never reuse a disconnected chip component. • Notice that the minus side of a tantalum capacitor may be damaged by heat. Flexible Circuit Board Repairing • Keep the temperature of the soldering iron around 270 ˚C during 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. CAUTION Use of controls or adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure. 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 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 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) To Exposed Metal Parts on Set 0.15 µF 1.5 kΩ AC voltmeter (0.75 V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. This is appliance is classied as a CLASS 1 LASER product. This is marking is located on the rear exterior. ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ! LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 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. 2 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 PUBLISHED BY SONY.