LED射频灯显示参数指导

LED射频灯显示参数指导 宁波爱米达半导体有限公司 部件培训资料 静电防护知识 ESD(静电敏感)是一种描述静电放电的术语，他指的是在两个物体间的传递。我们生活中冬天脱毛衣时看到的电火花现象就是静电放电发生效应的结果。 静电敏感的元件自制成开始一直到组成成品运发客户的整个过程都应考虑到静电保护。不仅要在焊接前提防静电，而且其后也要小心，因为它们很容易因静电放电而被损坏。 在装运元件和组装电路板的地方都应是防静电环境，所有在这些区域的导电体都要接地，不导电材料不应放在这些区域内。 无静电工作台是有良好接地的表面，并有防静电材料覆盖的台架。 1(静电是物体之间相互摩擦产生的，操作时，必须做好防静电措施，防止静电击穿极性元 件，如:三极管.IC等。 2(防止静电，进入车间必须戴防静电手带，把静电手带戴于手碗上的最小部位，拉紧，并 扣上定位扣，鳄鱼夹一端夹到静电接地线露铜部位，手带经测试合格方准上岗，测试不 合格，线长更换。 3(防止静电，电子元件用防静电盒盛放，半成品需用防静电箱子盛放，每层用气泡垫隔开， 并水平摆放整齐，防止锡点刮花零件。 4(作业员应避免穿尼龙，纯涤沦等容易产生静电的衣服工作。 电子元件 一、电阻 电阻的电路符号为R， 电阻，电阻分为固定电阻和可变电阻两大类，按制造材料可分为碳膜电阻和金属膜电阻。我们常用的是插件电阻和贴片电阻，电阻的单位是欧姆(Ω)，千欧(KΩ)，兆欧(MΩ)。63它们的换算公式为10Ω=1MΩ=10KΩ 电阻器是一种具有一定阻值，一定几何形状，一定性能参数。在电路中，它的主要作用是稳定和调节电路中的电流和电压，作为分流器、分压器和消耗电能的负载使用。 电阻器的标识方法 (1)贴片电阻的读法: 贴片电阻阻值误差精度有?1,、?2,、?5,、?10,精度，常规用的最多的是?1,和?5,，?5,精度的常规是用三位数来表示，例512，前面两位是有效数字，第三位数2表示有多少个零，基本单位是Ω,这样就是5100欧，1000Ω,1KΩ,1000000Ω=1MΩ。为了区分?5,，?1,的电阻，于是?1,的电阻常规多数用4位数来表示，这样前三位是表示有效数字，第四位表示有多少个零4531也就是4530Ω，也就等于4.53KΩ， (2)色环法:目前国标上普遍流行色环标识电阻，色环在电阻器上有不同的含义，它具有简单、直观、方便等特点。色环电阻中最常见的是四环电阻和五环电阻。 第一道色环印在电阻的金属帽上，表示电阻有效数字的最高位，也表示电阻值色标法读数的方向，第二道色环表示有效数字的次高位，第三道色环表示相乘的倍率，第四环表示误差。金色为?5%，银色为?10%。 值得注意的是:第四环的位置国内外的标法有异,国外有此厂家把第四环也标在另一端implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 的金属帽上,遇此情况切记:金色或银色的一端不是第一环。第一环是离元件体端部最近的一环。 例:某电阻的色环依次为“黄、紫、红、银”，则该电阻的阻值为4700Ω=4.7KΩ，误差为?10%。 附表:电阻器用色环标志的种类及含义 四环电阻 五环电阻 五环电阻(精密电阻) 五环电阻的标识与四环电阻的基本相同,只不过它多了一条数据环和多了一些误差别,五环电阻的误差在?2%以下。 例:某电阻的色环依次为“黄、紫、黑、棕、棕”，则该电阻的阻值为4.7KΩ,误差为?1%。 除了四环电阻和五环电阻，还有六环电阻，阻值读法与五环电阻一样，最后一环表示温度系数。 电阻按其功率不同又可分为:1/8W，1/4W，1/2W，1?5W，1W，2W等，功率越大，电阻体形也越大。贴片电阻的功率不同封装也不相同(如图): 封装 0201 0402 0603 0805 1206 1210 1812 2010 2512 功率 1/20W 1/16W 1/10W 1/8W 1/4W 1/3W 1/2W 3/4W 1W implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 注意:尽管电阻阻值一样，也不可使用低功率的电阻代替高功率的电阻。 二、电容 种类:陶瓷电容, 薄膜电容，无极性 电解电容， 钽电容， 有极性 X2安规电容 瓷片电容 电解电容 电容量:反映电容器施加电压后储存电荷的能力或储存电荷的多少。 A(电容作用:充放电和延时、定时作用，通交流隔直流. 6912B.电容单位:1F(法拉)=10UF(微法)=10nF(纳法)=10PF(皮法) C.陶瓷电容和薄膜电容的标示: 1 例:字面101=10*10PF=100PF D.极性电容如果极性插反,通电后会发生爆炸和不能正常工作. E.电容在电子线路中用"C"表示. + - 极性电容 非极性电容 三、 二极管 1. 二极管在线路中用"D"表示,是属半导体元件,利用它的单向导电性工作,具有整流、滤波+ 和开关作用,是极性元件,元件体白色一端为负极,黑色一端为正极. 2(稳压二极管的电路符号为:VR，稳压二极管 是极性元件，且极性用单杠在元件的一端标明，如图: - + 稳压二极管看起来很像普通的轴向引线二极管，但是它们在电路上的作用是不同的。 3. LED(发光二极管)也具有单向导电性,它能将电能转化为光能。不同种类的LED正负极辨别方法不一样 A、直插型LED的正负极辨别方法: 一、外观辨别法: (1)长脚端为正极，另一端为负极; (2)胶体平口端为负极，另一端为正极; (3)LED内部杯口，小杯为正极，大杯为负极。 二、万用表测量法: 将万用表打到“二极管”档，红笔插入“V”孔中，黑笔插入“COM”孔中，将两表笔分别搭于LED的两引脚上，当LED亮起，红笔所搭的引脚端代表正极，另一端为负极，反之，implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 当LED不亮时，调换两表笔所接的引脚，再重复上述步骤则可辨别LED的正负极。 三、LED测试盒: 将LED的两脚分别插于LED测试盒的第一行测试孔中(根据盒上标示)，按下红色按钮 点亮LED，此时插入标记为“，”端的引脚为LED的正极，另一脚为LED的负极。 3?0.15?0.1 5.3?0.1 5.3?0.1 25.4MinCATHODE25.4Min SL-313 SL-518 SL-5 5.0?0.15.0?0.1 8.6?0.17.0?0.1 CATHODECATHODE25.4Min25.4Min SL-522 SL-596 SL-566 B、贴片型LED的正负极辨别: 一、外观辨别法: LED正面有一缺口，该缺口端代表负极，另一端为正极。 二、万用表测量法: 将万用表打到“二极管”档，红笔插入“V”孔中，黑笔插入“COM”孔中，将两表笔分 别搭于LED的两焊盘上，当LED亮起，红笔所搭的引脚端代表正极，另一端为负极;若LED不亮调换两表笔所接的引脚，重复上述步骤则可辨别LED的正负极。 5 5 ST-3020 ST-3528 ST-5050 C、食人鱼LED的正负极辨别: implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 一、外观辨别法: 将其4只引脚按通路情况分为两端(两脚通路的为一端)，其正面缺口所处端代表负极，另一端为正极。 二、万用表测量法: 将万用表打到“二极管”档，红笔插入“V”孔中，黑笔插入“COM”孔中，将两表笔分别搭于LED的引脚两端上，当LED亮起，红笔所搭的引脚端代表正极，另一端为负极;若LED不亮则调换两表笔所接引脚，重复上述步骤则可辨别LED的正负极。 三LED测试盒: 将LED插入LED测试盒的第二行测试孔中(根据盒上标示)，按下红色按钮点亮LED，此时插入标记为“，”端的引脚为LED的正极，另一脚为LED的负极。 备注:FL-701:通过LED的胶体观察内部支架，其较大的支架为负极，该负极对角线处一脚为正极。亦可使用万用表测其对角线两脚来进行正负极的辨别。 正 11负 7.8?0.12.1mm1.5mm SF-104 SF-106 SF-107 FL-701 D、大功率LED的正负极辨别: 一、外观辨别法: 1、大功率LED(1W、3W):其正极引脚端旁有一圆孔金属片。 2、大功率LED(2.5W，5W):其正极处标有“+”符号，负极处标有“-”符号。 二、直流稳压电源点亮法: 将红笔插入电源的正极输出孔中，黑笔插入电源的负极输出孔中，根据LED类型进行限流操作(调节电源电压为2V，将两表笔搭于一处，此时将有电流显示，旋动CC按扭，调节输出电流。)。根据LED型号，将输出电流分别调整到小于:1WLED为350mA、3WLED为700mA、2.5WLED为400mA、5WLED为540mA，然后将两表笔分别搭于LED的两引脚或焊盘端，当LED亮起，红笔所搭的引脚端代表正极，另一端为负极;若LED不亮则调换两表笔所接引脚或焊盘，重复上述步骤则可辨别LED的正负极。 SPE-XXX1、SPE-XXX3 SPL-XXX2.5 SPL-XXX5 4、整流桥堆也属于二极管，它是由四个二极管组成，有极性。我们常用的有MB6S(贴implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 片)MB6M(直插)。在电路中起到整流的作用。 四、三极管(triode) 三极管是一种能将电信号放大的元件，是组成放大电路关键元件之一，其外形特征是有三个脚，如右图所示，其外壳有的用塑料封装，有的用金属封装。用金属封装的是为了便以散热，因为大功率三极管上流过的电流一般很大，容易发热。三极管的电路符号是“Q”，三极管是有极性的。三极管上的三个脚，代表着三个极:基极、集电极和发射极。三极管有二种型号:PNP和NPN。 NPN PNP b,基极 c,集电极 e,发射极 #1 (e) 1号管脚 A、金属封装三极管上的发射极的识别手里拿着三极管， E B C 使管脚向外，凸出的标签向上，标签左边的管脚就是发 射极(第一号管脚)。有时候可能出现有一管脚在标签的正下方， 这不是发射极，记住第一号管脚是发射极，在标签的左边。 B、塑料封装三极管的发射极的识别塑料封装的三极管 有一个平面，拿着三极管，让平面面对自己，第一号管脚(发射极) 就是最左边的管脚，这条管脚必须插在板上点的附近。有时 1# 1# 在三极管的平面会用字母“E”标发出射极所在。 C、功率三极管如图所示，一些功率三极管是可直接插入板的，其它的就需要一层绝缘物质隔在元件体和板之间，然后用螺丝上紧。功率三极管插入电路板时元件体上的字必须向上。 五、IC A、IC又名集成电路,电路符号为:U，它是将三极管、二极管、电阻和电容等元件,制作在同一硅片上，构成一个完整电路，绝缘层很薄，极易被静电击坏。 B、IC是半导体元件，有极性，IC的所有管脚都应有号码，其号码标示如图 标明第一号管脚的方法可用一小缺口或第一号管脚旁的小白点标明。第一号管脚通常被插入implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 一方盘中，电路板上有一带尖头的方框，IC插入电路板时，元件体上的缺口应对着尖头。 六、电感 电感是衡量线圈产生电磁感应能力的物理量。给一个线圈通入电流，线圈周围就会产生磁场，线圈就有磁通量通过。通入线圈的电源越大，磁场就越强，通过线圈的磁通量就越大。实验证明，通过线圈的磁通量和通入的电流是成正比的，它们的比值叫做自感系数，也叫做电感。如果通过线圈的磁通量用φ表示，电流用I表示，电感用L表示，那么 L, φ,I。电感的单位是亨(H)，也常用毫亨(mH)或微亨(uH)做单位。1H=1000mH，1H=1000000uH。 我们用得多的是色环电感和工字形电感。轴向引线电感器和电阻的外形是非常相似的，可区别它们的标志是电感器的一头有一条宽的银色色环。轴向引线由电感器用五个色环表示，第一环银色环比其它的色环大两倍,以下的三环标示电感的毫亨值,第五环表示电感的误差值。其后四环的标识方法和四环电阻的相同。 例:某电感器的后四环颜色依次为:红、红、黑、银， 则其电感值为:22微亨，?10%。 如果第二环或第三环的颜色是金色,则此金色环表示电感值的小数点. 例:某电感值的后四环颜色依次为:黄,金,紫,银,则其电感值为4.7UH?10%. 七、变压器 变压器的电路符号是:T，有极性。 八、保险管 A.保险管又名熔断器,在电路用"F"表示,其作用是电子设备短路,超负荷时,保险丝自动熔 断,保护设备或产品的元件. 保险丝是轴向引线元件 B.保险管无方向性. 九、开关(Switch) 常用的开关有三种类型:搬动开关、按扭开关和双列直插开关。 开关的电路符号是:S。 插件及注意事项 1. 插件时必须完全根据作业指导操作，熟读和理解自己工位的作业指导书，物料和工具种类同作业指导书一致，有异常问题发生即时反馈给线长，若线长离开工位，也可以反馈给主管等。 2.上班前必须戴好防静电手带，并进行测试是否合格。 3. 插件时要核对元件内容与作业指导书上的元件内容是否一致，无误后再插件，并根据PCB上的丝印插件，特别注意有正、负极的元件不能插反,也要注意元件加工时是否损伤,损伤的不能用。 4.插件前要检查前一工位元件是否插好,若没有插好,即反馈给该员工和线长,作出及时纠正,插件时不能碰到已插好的元件,导致倾斜或升高。 5.插件时不能把相似的元件摆在相邻,排线时尽可能把相似元件安排不同的操作员插件,以免混错。 6.工作台常保持整洁,不得将元件散放在工作台上,必须放在元件盒里,以免混料。坏料应放在指定的坏料盒内。 7.元件盒里的物料不能摆得太满,以免元件跌落,若元件跌在地上,不可用,及时捡起放入坏料盒,经线长和IPQC仔细检查没有损坏后才可用,否则报废。 implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 8.在插件时，元件一般要插正,防止倾斜过锡后没有脚,特殊工艺要求除外，元器件要从小到大，从左到右进行插件。卧式元件要与PCB贴平(平行)，立式要与PCB垂直。 9.每种型号插完后,须将元件盒内的元件清理干净,以防个别元件混料.特别是LED产品不能混挡。 10.正常情况插好的元件不可超出PCB,元件应到PCB边的距离最少为2mm,特殊工艺除外。 11.插件物料不可潮湿或有水,以免生锈及过锡炉后有锡珠。 补焊 1、在操作之前先检查治具是否环保，如:我们使用的烙铁、烙铁架、海棉、锡丝、锡丝架，并标识环保字样;在用烙铁前检查烙铁是否接地良好。 2、熟悉作业指导书、作业内容、注意事项、使用的材料的规格代码。 3、将烙铁插入220V电源插座上，使用烙铁为60W，正常使用时烙铁温度为350?5?，焊锡时焊点应光亮饱满，不可有冷焊、假焊、包焊、半边焊、锡点过小、漏焊等不良发生，如出现焊点不良，在PCB板上的焊点冷却后再补焊，防止铜箔浮翘。焊点应呈正弦波峰形状，表面应光亮圆滑，无锡刺，锡量适中。 4、焊接完成后，要把线路板上残余的助焊剂清洗干净，以防炭化后的助焊剂影响电路正常工作。还必须检查所焊件是否有虚焊，漏焊，是否有毛刺，错焊，短路现象。 5、电烙铁与水平面大约成45?角。以便于熔化的锡从烙铁头上流到焊点上，焊接时间不宜 过长，否则容易烫坏元件，一般在2,3秒，必要时可用镊子夹住管脚帮助散热。 6、作业过程中如发现不良(如DC线铜线外露、混料)，应及时用“红色”标签标识，让巡 长确认，如连续出现3PCS应知会线长安排人全检或自检，并由IPQC知检IPQC确认或者线 会责任单位前来检讨并改善。 7、中休时须往烙铁头上加锡，以保护烙铁头，并取掉电源插头，以增长烙铁的使用寿命。 切忌将烙铁猛击在工作台或其它硬物上进行敲锡，因为陶瓷发热管不能承受重压。 8、在作业过程中，应保持产品的摆放整齐，定点、定距、定向，不可堆积，保持顺畅; 9、作业过程中要求员工绝不能随心所欲，同时要做到“手到、眼到、心到”，这样一个不良品也跑不掉。 10、要正确区分良品与不良品的焊点(例第3点)及概念，良品就是符合品质标准或要求的材料、半成品及成品，不良品就是不符合品质标准或要求的材料、半成品、成品。 11、焊点检查员不可将不环保的毛刷刷环保的产品，不环保的剪钳修剪环保产品的锡脚。 1、焊料轮廓:印制电路板焊盘与引脚间应呈弯月面 润湿角 15:<θ<45: 烙铁头接送上焊锡焊锡丝脱烙铁头脱 触工件 丝 离焊点 离焊点 implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 2、供给时间:工件升温达到焊料的熔解温度时立即送上焊锡; 供给位置:送锡时焊锡丝应接触在烙铁头的对侧或旁侧，而不应与烙铁头直接接触。3. 焊接要领 (1)烙铁头与被焊工件的接触方式 接触位置:烙铁头应同时接触需要互相连接的两个工件，烙铁一般倾斜45:; 接触压力:烙铁头与工件接触时应略施压力，以对工件表面不造成损伤为原则; 供给数量:锡量要适中。 主要衡量标准为:润湿角为15:<θ<45:;不能呈“馒头”状，否则会掩盖假焊点。 (2) 烙铁头的脱离方法 脱离时间:观察焊锡已充分润湿焊接部位，而焊剂尚未完全挥发，。形成光亮的焊点时立即脱离，若焊点表面变得无光泽而粗糙，则说明脱离时间太晚了。 脱离动作:脱离时动作要迅速，一般沿焊点的切线方向拉出或沿引线的轴向拉出，即将脱离时又快速的向回带一下，然后快速的脱离，以免焊点表面拉出毛剌。 implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 测试要求 1( 测试过程中要按不同档次产品分开进行测试，要轻拿轻放，并要整齐摆放，不能损伤 到 LED; 2( 要严格按照产品组装测试规格，将电源调到测试电压(如我们常用的DC5V、7.5V、12V、 17V、24V、AC220V)。需要限流的要限制电流; 3( 在低压测试时需要区分正负极，不能反向测试，否则也会对LED造成不良后果。高压 AC220V测试时要注意安全; 4( 测试好后的参数要在规定的范围之内，否则为不合格品(如输出电流、输出功率等)， 挑出进行维修，并贴上红色标签; 5( 测试时还要目测LED灯是否不亮或色泽不均，个别LED不亮等现象，不合格的要挑出; 6( 特殊产品要按照测试仪器上配套的程序检测其电性能参数。 implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical 外观检验要求 1( LED不能有插反现象;PCB表面不能有杂物、松香、油渍以及锡渣和锡珠; 2( 沾锡角应小于90度，焊锡不能有缩锡和不沾锡等不良焊锡，锡面应覆盖焊盘的95%以 上; 3( 吃锡不能过多，元件脚未露出锡面以及焊锡延伸到PCB背面及零件上为不良; 4( 焊点不能存在虚焊、漏焊、错焊、冷焊、拉尖、连焊、有毛刺等不良现象; ( 零件应紧贴PCB表面，不可有浮高和倾斜等不良; 5 6( 检查整个在制品有无脏物、划伤、装配不到位、电源引线绝缘部分是否烫坏以及引线长 度不对称、绞缠等现象; 7( 根据组装测试规格检查产品和包装材料上是否贴上标签。且是否按要求进行包装，需要 用静电袋的必须用防静电PE袋。包装箱整体不能有任何的伤痕、脏污、凹凸、气泡等 现象。彩盒的外表丝印部分不能有任何偏位、漏印、模糊不清、沾接不等现象。 implementation model. Pay special attention to prevent floating style, do something superficial, cosmetic, overcome the love of work, short of a name, one of the benefits of bad ideas. To strengthen the sense of dedication. Office in the work of the Government "nerve centre", task, and burden, busy with work, hard, tough and sometimes thankless. Come into the Office the door, will not name, not for profit, unsung hero willing; to stand up to all kinds of misunderstandings, disappointments and setbacks, inclusive of ups and downs; "any hard labor, difficult, pick is hard to pick of Dan" the spirit of love and dedication, and hard work. Second, capacity-building, top-notch performance. Office of theWork lies in the people. Government offices at all levels must follow the 16 session of the plenum on strengthening the ruling ability construction of the party in order to improve the professional quality as the core, to strengthen capacity-building, picked up a pen to write, pen said, when anything can be done. To enhance the research capacity. Neither leaders nor the General staff, will continue to face the masses, face reality and society, doing the research work. Conditions permitting, are often grassroots, institutionalized, and perseverance. Investigation depth must not be superficial, also must have the breadth must not be biased. Through research, formed a quality, thoughtful, valuable research reports, improving the ability to analyze and solve practical