R-500A/B更换PCB板的步骤及调节

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                    <p><span style="">       <img src="http://mmbiz.qpic.cn/mmbiz/uwD6icYMd8CdPvkFkiblghjjWUpcltNQViaNczNVUSUrFe0lCpCic3TBdicbfAicIECDqYklggpTmywT3eEzZ7rkelwA/0" data-ratio="0.20725388601036268" data-w="386" src="http://mmbiz.qpic.cn/mmbiz/uwD6icYMd8CdPvkFkiblghjjWUpcltNQViaNczNVUSUrFe0lCpCic3TBdicbfAicIECDqYklggpTmywT3eEzZ7rkelwA/0" style="text-align: center; white-space: normal; word-wrap: break-word !important; box-sizing: border-box !important; visibility: visible !important;"  /></span></p><p><span style="">      R-500A/B<span style="font-family:宋体">更换</span><span style="font-family:Times New Roman">PCB</span><span style="font-family:宋体">板的步骤及调节</span></span></p><p><span style="">一：更换<span style="font-family:Times New Roman">CPU</span><span style="font-family:宋体">板</span></span></p><p style="margin-left:24px"><span style="">1． </span><span style="">检查新<span style="font-family:Times New Roman">CPU</span><span style="font-family:宋体">板上是否有</span><span style="font-family:Times New Roman">EPROM</span><span style="font-family:宋体">，如果没有，插上原板上的</span><span style="font-family:Times New Roman">EPROM</span><span style="font-family:宋体">；</span></span></p><p style="margin-left:24px"><span style="">2． </span><span style="">装好<span style="font-family:Times New Roman">CPU</span><span style="font-family:宋体">板，将各插头连接好，检查无误后开机；</span></span></p><p style="margin-left:24px"><span style="">3． </span><span style="">开机后蜂鸣器响约<span style="font-family:Times New Roman">3</span><span style="font-family:宋体">秒，显示</span><span style="font-family:Times New Roman">300mA</span><span style="font-family:宋体">，</span><span style="font-family:Times New Roman">0.32Sec,</span><span style="font-family:宋体">及</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">值，电源指示灯亮。如果没有</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">显示，电源指示灯不点亮，须微调</span><span style="font-family:Times New Roman">SIGN</span><span style="font-family:宋体">板上电位器</span><span style="font-family:Times New Roman">R56</span><span style="font-family:宋体">（最后调，先调</span><span style="font-family:Times New Roman">sign</span><span style="font-family:宋体">板）；</span></span></p><p style="margin-left:24px"><span style="">4． </span><span style="">测量<span style="font-family:Times New Roman">CPU</span><span style="font-family:宋体">板上测量点</span><span style="font-family:Times New Roman">TP13-TP3</span><span style="font-family:宋体">（</span><span style="font-family:Times New Roman">TP3</span><span style="font-family:宋体">为</span><span style="font-family:Times New Roman">15V</span><span style="font-family:宋体">电源零点）之间电压，其值应为</span><span style="font-family:Times New Roman">VTP13=4.2V</span></span><span style="">±</span><span style="">0.1V<span style="font-family:宋体">，再测量自藕变压器</span><span style="font-family:Times New Roman">OV</span><span style="font-family:宋体">抽头和</span><span style="font-family:Times New Roman">220V</span><span style="font-family:宋体">抽头之间的电压，其值应在</span><span style="font-family:Times New Roman">217V-223V</span><span style="font-family:宋体">之间。微调</span><span style="font-family:Times New Roman">SIGH</span><span style="font-family:宋体">板上电位器</span><span style="font-family:Times New Roman">R56</span><span style="font-family:宋体">，使电压指示灯亮，</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">显示预示值；</span></span></p><p style="margin-left:24px"><span style="">5． </span><span style="">反复开关机数次，检查每次开机是否正常。注意关机和开机时间间隔大于<span style="font-family:Times New Roman">10</span><span style="font-family:宋体">秒；</span></span></p><p style="margin-left:24px"><span style="">6． </span><span style="">按维修手册的相关内容检查机器功能是否正常；</span></p><p style="margin-left:24px"><span style="">7． </span><span style="">曝光，</span><span style="">用<span style="font-family:Times New Roman">KVp</span><span style="font-family:宋体">表校验实际</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">值，</span><span style="font-family:Times New Roman">SIGH</span><span style="font-family:宋体">板的电位器</span><span style="font-family:Times New Roman">R19</span><span style="font-family:宋体">调节面板</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">预示值。如没有</span><span style="font-family:Times New Roman">KVp</span><span style="font-family:宋体">表，调节</span><span style="font-family:Times New Roman">R19</span><span style="font-family:宋体">，使面板显示</span><span style="font-family:Times New Roman">300mA/125kv</span><span style="font-family:宋体">时，空间电荷抵偿器</span><span style="font-family:Times New Roman">T3</span><span style="font-family:宋体">的端子</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">之间的电压为</span><span style="font-family:Times New Roman">337V</span><span style="font-family:宋体">。</span></span></p><p><span style="">二：更换<span style="font-family:Times New Roman">I/O</span><span style="font-family:宋体">板</span></span></p><p style="margin-left:24px"><span style="">1． </span><span style="">装好新的<span style="font-family:Times New Roman">I/O</span><span style="font-family:宋体">板，将各插头、端子连接好，将电位器</span><span style="font-family:Times New Roman">R2</span><span style="font-family:宋体">和</span><span style="font-family:Times New Roman">R26</span><span style="font-family:宋体">调节到中间位置，检查无误后开机；</span></span></p><p style="margin-left:24px"><span style="">2． </span><span style="">选择<span style="font-family:Times New Roman">300mA/125KV</span><span style="font-family:宋体">，调节电位器</span><span style="font-family:Times New Roman">R2</span><span style="font-family:宋体">，使电容器</span><span style="font-family:Times New Roman">C1</span><span style="font-family:宋体">两端的电压</span></span><span style="">≤</span><span style="">25V<span style="font-family:宋体">，然后选择</span><span style="font-family:Times New Roman">100mA/50KV</span><span style="font-family:宋体">，如果此时显示故障代码</span><span style="font-family:Times New Roman">Er2,</span><span style="font-family:宋体">则微调电位器</span><span style="font-family:Times New Roman">R2</span><span style="font-family:宋体">，使在小焦点</span><span style="font-family:Times New Roman">100mA</span><span style="font-family:宋体">至大焦点</span><span style="font-family:Times New Roman">500mA</span><span style="font-family:宋体">整个</span><span style="font-family:Times New Roman">mA</span><span style="font-family:宋体">挡范围内工作正常</span></span></p><p style="margin-left:24px"><span style="">3． </span><span style="">按下曝光手闸第一挡，如果球管不能正常启动，显示故障代码<span style="font-family:Times New Roman">Er4</span><span style="font-family:宋体">，则微调电位器</span><span style="font-family:Times New Roman">R26</span><span style="font-family:宋体">，使球管能正常启动：</span></span></p><p style="margin-left:24px"><span style="">4． </span><span style="">按维修手册的相关内容检查机器功能是否正常。</span></p><p><span style="">三：更换<span style="font-family:Times New Roman">SIGN</span><span style="font-family:宋体">板</span></span></p><p style="margin-left:24px"><span style="">1． </span><span style="">装好新的<span style="font-family:Times New Roman">SIGN</span><span style="font-family:宋体">板，将各插头、端子连接好，取下保险丝</span><span style="font-family:Times New Roman">RD4</span><span style="font-family:宋体">，检查无误后开机：</span></span></p><p style="margin-left:24px"><span style="">2． </span><span style="">用万用表检测自藕<span style="font-family:Times New Roman">0V</span><span style="font-family:宋体">和</span><span style="font-family:Times New Roman">220V</span><span style="font-family:宋体">抽头之间电压</span><span style="font-family:Times New Roman">V</span><span style="font-family:宋体">，用手转动电源电压自动调节电机</span><span style="font-family:Times New Roman">SMI</span><span style="font-family:宋体">的转轮，使</span><span style="font-family:Times New Roman">V</span><span style="font-family:宋体">在</span><span style="font-family:Times New Roman">217V-223V</span><span style="font-family:宋体">之间变化，同时调节电位器</span><span style="font-family:Times New Roman">R1</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">R7</span><span style="font-family:宋体">，使</span><span style="font-family:Times New Roman">V</span></span><span style="">≤</span><span style="">217<span style="font-family:宋体">时，发光二极管</span><span style="font-family:Times New Roman">LD2</span><span style="font-family:宋体">亮，</span><span style="font-family:Times New Roman">V</span></span><span style="">≥</span><span style="">223V<span style="font-family:宋体">时，发光二极管</span><span style="font-family:Times New Roman">LD1</span><span style="font-family:宋体">亮：</span></span></p><p style="margin-left:24px"><span style="">3． </span><span style="">装上保险丝<span style="font-family:Times New Roman">RD4</span><span style="font-family:宋体">后开机，在电源电压自动调节电机</span><span style="font-family:Times New Roman">SM1</span><span style="font-family:宋体">停转时，测量电压</span><span style="font-family:Times New Roman">217</span></span><span style="">≤V≤</span><span style="">223V<span style="font-family:宋体">，如不是，微调</span><span style="font-family:Times New Roman">R1</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">R7</span><span style="font-family:宋体">，使读数</span><span style="font-family:Times New Roman">V</span><span style="font-family:宋体">在范围内，反复开关机数次验正，注意关机和开机时间间隔大于</span><span style="font-family:Times New Roman">10</span><span style="font-family:宋体">秒：</span></span></p><p style="margin-left:24px"><span style="">4． </span><span style="">作内容一的步骤<span style="font-family:Times New Roman">3</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">4</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">5</span><span style="font-family:宋体">；</span></span></p><p style="margin-left:24px"><span style="">5． </span><span style="">选择<span style="font-family:Times New Roman">300A</span><span style="font-family:宋体">挡，调节电压器</span><span style="font-family:Times New Roman">R19</span><span style="font-family:宋体">，使空间电荷抵偿器的端子</span><span style="font-family:Times New Roman">1</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">2</span><span style="font-family:宋体">之间的电压</span><span style="font-family:Times New Roman">336V</span><span style="font-family:宋体">时，面板</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">预示值为</span><span style="font-family:Times New Roman">125KV</span><span style="font-family:宋体">；</span></span></p><p style="margin-left:24px"><span style="">6． </span><span style="">用手闸曝光，用<span style="font-family:Times New Roman">KVp</span><span style="font-family:宋体">表校验实际</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">值，电位器</span><span style="font-family:Times New Roman">R19</span><span style="font-family:宋体">调节</span><span style="font-family:Times New Roman">KV</span><span style="font-family:宋体">预示值，如没有</span><span style="font-family:Times New Roman">KVp</span><span style="font-family:宋体">表，可不作此步骤；</span></span></p><p style="margin-left:24px"><span style="">7． </span><span style="">将<span style="font-family:Times New Roman">R29</span><span style="font-family:宋体">、</span><span style="font-family:Times New Roman">R32</span><span style="font-family:宋体">调节到中间位置，不曝光，调节</span><span style="font-family:Times New Roman">R34</span><span style="font-family:宋体">，使测量点</span><span style="font-family:Times New Roman">TP8-TP1</span><span style="font-family:宋体">（</span><span style="font-family:Times New Roman">TP1</span><span style="font-family:宋体">为电源零点）之间的电压</span><span style="font-family:Times New Roman">VTP8</span></span><span style="">≤</span><span style="">40mV<span style="font-family:宋体">；</span></span></p><p style="margin-left:24px"><span style="">8． </span><span style="">关机，拆下<span style="font-family:Times New Roman">M</span><span style="font-family:宋体">线，将</span><span style="font-family:Times New Roman">mA</span><span style="font-family:宋体">检测表串入；</span></span></p><p style="margin-left:24px"><span style="">9． </span><span style="">选择曝光条件<span style="font-family:Times New Roman">300m</span></span><span style="">A/50KV/0.1Sec</span><span style="">，在维修状态下用手闸曝光，调节电位器<span style="font-family:Times New Roman">R32</span><span style="font-family:宋体">使面板显示</span><span style="font-family:Times New Roman">mA</span><span style="font-family:宋体">值与</span><span style="font-family:Times New Roman">mA</span><span style="font-family:宋体">检测表读数误差</span></span><span style="">≤</span><span style="">10%<span style="font-family:宋体">，不暴光，调节</span><span style="font-family:Times New Roman">R34</span><span style="font-family:宋体">，使测量点</span><span style="font-family:Times New Roman">TP8-TP1</span><span style="font-family:宋体">（</span><span style="font-family:Times New Roman">TP1</span><span style="font-family:宋体">为电源零点）之间电压</span><span style="font-family:Times New Roman">VTP8</span></span><span style="">≤</span><span style="">40mV<span style="font-family:宋体">，重复这个步骤到满足要求；</span></span></p><p><span style="">10.<span style="font-family:宋体">确认点</span><span style="font-family:Times New Roman">100mA</span><span style="font-family:宋体">到大焦点</span><span style="font-family:Times New Roman">500mA</span><span style="font-family:宋体">各点曝光均正常；</span></span></p><p><span style="">11.<span style="font-family:宋体">按维修手册的相关内容检查机器功能是否正常。                                                       </span></span><span style="font-family: 宋体; font-size: 14px;">                  </span></p><p style="white-space: normal;"><span style="font-family: 宋体, Verdana, Arial; line-height: 24px; background-color: rgb(255, 255, 255);"><img data-s="300,640" src="http://mmbiz.qpic.cn/mmbiz/A1DicCH9Vl6PAQiaibZlIAIKm4Tmrv1pxll6OTDl7vTPcW6yqKG3Eko0qlm1fbxKBWNTmzu5lib17XcCcPA9ICRsVQ/0" data-ratio="0.5573122529644269" data-w=""  /></span></p><p style="white-space: 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