Memorex MVD5450C free download

File name MVD4540CSM.pdf

MVD4540C SERVICE MANUAL DVD VIDEO PLAYER & VHS VIDEO CASSETTE RECORDER ORIGINAL MFR'S VERSION A Design and specifications are subject to change without notice. CAUTION THIS DIGITAL VIDEO PLAYER EMPLOYS A LASER SYSTEM. TO ENSURE PROPER USE OF THIS PRODUCT, PLEASE READ THIS SERVICE MANUAL CAREFULLY AND RETAIN FOR FUTURE REFERENCE. SHOULD THE UNIT REQUIRE MAINTENANCE, CONTACT AN AUTHORIZED SERVICE LOCATION-SEE SERVICE PROCEDURE. USE OF CONTROLS, ADJUSTMENTS OR THE PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE. TO PREVENT DIRECT EXPOSURE TO LASER BEAM, DO NOT TRY TO OPEN THE ENCLOSURE. VISIBLE LASER RADIATION MAY BE PRESENT WHEN THE ENCLOSURE IS OPENED. DO NOT STARE INTO BEAM. Location of the required Marking The rating sheet and the safety caution are on the rear of the unit. CERTIFICATION: COMPLIES WITH FDA RADIATION PERFORMANCE STANDARDS, 21 CFR SUBCHAPTER J. PREPARATION OF SERVICING The laser diode used for a pickup head may be destroyed with external static electricity. Moreover, even if it is operating normally after repair, when static electricity discharge is received at the time of repair, a life of product may become short. Please perform the following measure against static electricity, be careful of destruction of a laser diode enough at the time of repair, and work. · It works on the desk which performed measures against static electricity, such as conductive mat. · Soldering iron with ground wire or ceramic type is used. · A worker needs to use a ground conductive wrist strap for body. A1-1 IMPORTANT SERVICE SAFETY INFORMATION Safety precautions to be followed during servicing: 1. Parts marked with an are critical parts for safety. Replace only with the one described in the parts list. 2. Before returning the DVD product to the customer, make the appropriate leakage current check or resistance measurements to ensure that exposed parts are properly insulated from the supply circuit. A leakage current check is recommended for this unit. Plug the AC line cord directly into a 120V 60Hz AC outlet (do not use an isolation transformer for this check). Use a leakage current tester (Fig. 1) or a metering system which complies with Underwriters Laboratories (UL 1409). Measure for current from all exposed metal parts of the cabinet to a known earth ground: particularly, any exposed metal part having a return path to the chassis. Any current measured must not exceed 0.5mA. Any measurement not within the limits outlined above are indicative of a potential shock hazard and corrective action must be taken before returning the unit to the customer. (Reading should not be above 0.5mA) Leakage Current Tester PRODUCT UNDER TEST 1.5K ohm 0.15 µF 2-Blade polarized type cord set Test all exposed metal surfaces TEST PROBE KNOWN EARTH GROUND Fig. 1 AC Leakage Test A1-2 IMPORTANT SAFEGUARDS 1. 2. 3. 4. 5. READ INSTRUCTIONS All the safety and operating instructions should be read before t