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激光唱机是目前音响设备中的佼佼者,其放音质量非一般唱机可比,是音乐爱好者、音响发烧友喜爱产品。现以爱特CD-2208HR激光唱机为例,介绍十种常见故障及其原因。整机电原理图见本刊1995年第6期中心插页。 [例1]故障现象 接通电源,整机不工作,显示屏无显示。 故障原因 机外供电电源未加到线路板上。具体原因有电源插头与插座接触不良;电源线断线和交流供电保险丝熔断等,如果电源插头、插座、电源线和保险丝都正常,则机内电源相关元件有故障或损坏。通常为电源开关接触不良或损坏,电源变压器初级或次级接线柱松动;整流桥堆D304烧坏;C303、C304、C305和C306损坏;Q101损坏;保护电阻R307和R308烧断。
CD player is currently the leader in audio equipment, its playback quality is not comparable to a regular record player, music lovers, audio enthusiasts favorite products. Now Aite CD-2208HR CD player, for example, describes the ten common faults and their causes. The whole electrical schematic see the magazine in 1995 No. 6 Center insert. [Example 1] Symptom Power, the machine does not work, the display no display. Fault causes external power supply is not added to the circuit board. The specific reasons are poor contact with the power plug and socket; power line disconnection and AC power supply fuse blown, etc., if the power plug, socket, power cord and fuse are normal, the power supply related components failure or damage. Normally the mains switch is not properly connected or damaged. The primary or secondary terminals of the power transformer are loose. The rectifier bridge stack D304 is damaged. The C303, C304, C305 and C306 are damaged. The Q101 is damaged. The protection resistors R307 and R308 are blown.