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日立CMT2598彩电利用开关电源厚膜电路STR-S6708内部的过压保护功能,设计了晶闸管保护电路,当行、场扫描电路发生过流、过压故障时,进入保护状态。一、保护电路工作原理日立CMT2598彩电保护电路如图1所示(图见下页),分布在电源板和主板上,通过插接件PC、PB相互连接,其保护原理分析如下:该机的开关电源主要由开关变压器T901初级的
Hitachi CMT2598 color TV using thick film circuit switch power STR-S6708 internal over-voltage protection, designed thyristor protection circuit, when the line, field scan circuit over-current, over-voltage failure, into the protection state. First, the protection circuit works Hitachi CMT2598 TV protection circuit shown in Figure 1 (see next page), distributed in the power board and the motherboard, through the connector PC, PB interconnected, the protection principle analysis is as follows: The machine’s Switching power supply mainly by the switching transformer T901 primary