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例一故障现象:接通电源,按下“OPEN/CLOSE(CD)/(LD)”二个LD/CD托盘进出键,指示灯闪动,功能显示屏上显示“00:00”,约二三秒钟后,电源自动保护关闭。再按“POWER”(电源开关)键,显示“H2”约一秒钟后,又自动关闭电源。分析、检修:拆开机盖(代码表提示为电源不良),通电观察机械部分,发现光头不动,无激光发出,进出(加载)电机均不动作,由此怀疑无±5 V、±12 V电源供给。CLD-S270电源为开关电源。因为显示屏工作正确,说明开关电源自身正常,有可能是±5V、±12 V输出有问题。检查发现±5 V保护器IC1(ICP-N15)、
Example 1 Symptom: Turn on the power, press “OPEN / CLOSE (CD) / (LD)” two LD / CD tray access button, the indicator flashes, the function display shows “00:00”, about two After three seconds, the power is automatically protected off. Press the “POWER” button again to display “H2” for about one second, and turn off the power automatically. Analysis, overhaul: disassemble the cover (the code table prompts for poor power), power to observe the mechanical part, found that the bald fixed, no laser issue, out of (loading) the motor does not move, it is suspected no ± 5 V, ± 12 V power supply. CLD-S270 power supply for the switching power supply. Because the screen is working correctly, indicating that the switching power supply itself is normal, there may be ± 5V, ± 12 V output problems. Check found ± 5 V Protector IC1 (ICP-N15),