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无绳电话机是一种有线与无线相结合的通信设备,其功能齐全、使用方便,而被广泛使用。现以CTO-02型无绳电话机为例,介绍其常见故障的检修方法。例1.故障现象:主机不工作。分析检修:其故障原因主要有:(1)电源变压器不良;(2)CPU供电线路故障;(3)CPU掉电检测电路有故障,而使其始终误判电源停电。首先检查电源变压器次级有无9V交流电压输出;CPU的供
Cordless telephone is a combination of wired and wireless communications equipment, its full-featured, easy to use, and is widely used. Now CTO-02-type cordless phone, for example, describes the common troubleshooting methods. Example 1. Symptom: The host does not work. Analysis and maintenance: The main reasons for the failure are: (1) bad power transformer; (2) CPU power supply line failure; (3) CPU power-down detection circuit is faulty, leaving it always misjudged power blackouts. First check the secondary power transformer 9V AC voltage output; CPU for