HarmanKardon-DVD38-cd-维修说明书手册含电器原理图

DVD38harman/kardonSERVICING PRECAUTIONSNOTES REGARDING HANDLING OF THE PICK-UP1.Notes for transport and storage1)The pick-up should always be left in its conductive bag until immediately prior to use.2)The pick-up should never be subjected to extemal pressure or impact.Drop impactStorage in conductive bag济2.Repair notes1)The pick-up incorporates a strong magnet,and so should never be brought close to magnetic materials.2)The pick-up should always be handled correctly and carefully,taking care to avoid external pressure andimpact.If it is subjected to strong pressure or impact,the result may be an operational malfunctionand/or damage to the printed-circuit board.3)Each and every pick-up is already individually adjusted to a high degree of precision,and for that reasonthe adjustment point and installationscrews should absolutely never be touched.4)Laser beams may damage the eyes!Absolutely never pemmit laser beams to enter the eyes!Also NEVER switch ON the power to the laser output part (lens,etc.)of the pick-up if it is damaged.NEVER look directly at the laser beam,and don't let contactfingers or other exposed skin.5)Cleaning the lens surfaceIf there is dust on the lens surface,the dust should be cleaned away by using an air bush (such as usedfor camera lens).The lens is held by a delicate spring.When cleaning the lens surface,therefore,a cot-ton swab should be used,taking care not to distort this.PressureMagnetPressureHow to hold the pick-upCotton swabConductive Sheet6)Never attempt to disassemble the pick-up.Spring by excess pressure.If the lens is extremely dirty,apply isopropyl alcohol to the cotton swab.(Donot use any other liquid cleaners,because they will damage the lens.)Take care not to use too much ofthis alcohol on the swab,and do not allow the alcohol to get inside the pick-up.2