低压电源是CT机系统正常工作的基础。GE9800CT机低电压大电流的供电特点,对低压电源提出更高要求,一旦低压电源发生故障,系统将出现电路逻辑错误,会引起高压发生系统、数据收集系统、数据处理系统以及其它控制电路方面的故障,致使系统停机。在这种情况下,只要抓住低压供电系统这个主要矛盾,其它问题就迎刃而解了床台(24V、±15V、5V)电源,扫描架(±15V、SV)电源故障串较高,而且,这两部分低压电源发生故障时,CT机自检诊断系统不能准确指出故障范围,给维修人员排除故障增加了困难。下面简要 Low-voltage power supply is the basis for the normal work of CT machine system. GE9800CT machine low voltage and high current power supply characteristics, put forward higher requirements for low-voltage power supply, once the low-voltage power supply fails, the system will appear logic errors, will cause high voltage generating system, data collection system, data processing system and other control circuits Failure, resulting in system downtime. In this case, as long as the main contradiction of low-voltage power supply system is grasped, the rest of the problems are solved by the bed (24V, ± 15V, 5V) power supply and the gantry (± 15V, SV) power failure string is high. Two parts of the low-voltage power supply failure, CT machine self-test diagnostic system can not accurately point out the scope of the fault, to the maintenance staff to troubleshoot an increase of difficulty. The following brief