Sanyo DP23625 Service Manual

Also see for DP23625: Owner's manual

Contents

Sanyo DP23625 Service Manual Manual pdf 2 page image

— 2 —SAFETY INSTRUCTIONSSAFETY PRECAUTIONS1. Comply with all caution and safety-related notes providedon the side of the cabinet, inside the cabinet, and on thechassis,2. When replacing a chassis in the cabinet, always be certainthat all the protective devices are installed properly, suchas control knobs, adjustment covers, shields and barriers.3. Before replacing the back cover of the set, thoroughlyinspect the inside of the cabinet to see that no stray partsor tools have been left inside.ANTENNA COLD CHECKRemove AC plug from the 120 VAC outlet and place ajumper across the two blades. Connect one lead of an ohm-meter to the jumpered AC plug, and touch the other lead toeach exposed antenna terminal (UHF and VHF antenna ter-minals). The resistance must measure between 1M ohm and5.2M ohm. Any resistance value below or above this rangeindicates an abnormality which requires corrective action.LEAKAGE CURRENT CHECKPlug the AC line cord directly into a 120 VAC outlet. (Do notuse an isolation transformer for this check.) Use an AC volt-meter, that has 5000 ohms per volt or more sensitivity.Connect a 1500 ohm 10 watt resistor, paralleled by a 0.15 μF150 VAC capacitor, between a known good earth ground(water pipe, conduit, etc.) and all exposed metal parts of thecabinet (antennas, handle bracket, metal cabinet, screwheads, metal overlays, control shafts, etc.). Measure the ACvoltage across the 1500 ohm resistor. The AC voltageshould not exceed 750 mV. A reading exceeding 750 mVindicates that a dangerous potential exists. The fault mustbe located and corrected. Repeat the above test with thereceiver power plug reversed.NEVER RETURN A RECEIVER TO THE CUSTOMERWITHOUT TAKING THE NECESSARY CORRECTIVE ACTION.PRODUCT SAFETY NOTICEWhen replacing components in a receiver, always keep inmind the necessary product safety precautions. Pay specialattention to the replacement of components marked with astar () in the parts list and in the schematic diagrams. Toensure safe product operation, it is necessary to replacethose components with the exact same PARTS.0.15 μF 150V AC1500 ohm10 wattGood earth groundsuch as a water pipe,conduit, etc.AC OUTLETTELEVISIONRECEIVERREADING SHOULD NOT EXCEED 750 mV.AC VOLTMETER(5000 ohms per volt or more sensitivity)To be touched to all of exposed metal parts.Voltmeter Hook-up for Leakage Current Check.