论文部分内容阅读
一、进出盒驱动电路原理(如图1所示) 该机所采用的伺服及数字处理集成块是U802(SAA7372G),其中(40)、(41)两脚是进出盒控制端,(63) 脚为图1 先科AEP—713K影碟机进出盒驱动电路原理图进出盒到位检测控制端,平时其(40)、(41)两脚都为高电平“5V”。在出盒时(41)脚送出低电平“0V”,(40)脚不变,仍为高电平“5V”,而在进盒时则(40)脚送出低电平“0V”,(41)脚不变,仍为高电平“5V”。进出盒驱动电路的具体工作原理是:在出盒时,CPU送出控制指令,伺服控制板的伺服及数字处理集成块U802的(41)脚送出低电平
First, out of the box drive circuit principle (shown in Figure 1) The machine used in the servo and digital processing block is U802 (SAA7372G), wherein (40), (41) both feet out of the box control side, Feet Figure 1 AEP-713K DVD player out of the box drive circuit schematic into the box in place detection control terminal, usually its (40), (41) feet are high “5V.” In the box when the output (41) feet sent low “0V”, (40) feet unchanged, still high “5V”, and in the box when the (40) feet sent low “0V” (41) feet unchanged, still high “5V.” Out of the box drive circuit specific working principle is: out of the box, the CPU sends control instructions, servo control board servo and digital processing block U802 (41) feet sent low