换ic1-431l后故障排除。 f．lq-i6ookiii主板开机后，所有灯全亮无其他动作。 此
huan ic1-431l hou gu zhang pai chu f lq-i6ookiii zhu ban kai ji hou suo you deng quan liang wu qi ta dong zuo ci
一不分析认为ic1有问题，因为ic1主要用来检测5v电压，如性能不稳极有可能造成5v保护电路工作，更
yi bu fen xi ren wei ic1 you wen ti yin wei ic1 zhu yao yong lai jian ce 5v dian ya ru xing neng bu wen ji you ke neng zao cheng 5v bao hu dian lu gong zuo geng
运转，进一步检查5v有关元件且采用替换法更换ic51、q55、q53等后级5v有关元件均未能修复。进
yun zhuan jin yi bu jian cha 5v you guan yuan jian qie cai yong ti huan fa geng huan ic51 q55 q53 deng hou ji 5v you guan yuan jian jun wei neng xiu fu jin
法先取下q51-a1680通电风扇运转正常，说明判断正确。重新按上一只a1680通电风扇依就不能正常
fa xian qu xia q51-a1680 tong dian feng shan yun zhuan zheng chang shuo ming pan duan zheng que zhong xin an shang yi zhi a1680 tong dian feng shan yi jiu bu neng zheng chang
停止，电源板发出电流啸叫声。 根据此种现象初步判断是由于5v电路有故障，故先检查5v电路，采用替换
ting zhi dian yuan ban fa chu dian liu xiao jiao sheng gen ju ci zhong xian xiang chu bu pan duan shi you yu 5v dian lu you gu zhang gu xian jian cha 5v dian lu cai yong ti huan
查后发现是由于去错垫片，正确安装后故障排除。 e.lq-1600kiii电源板通电后风扇运转几秒后
cha hou fa xian shi you yu qu cuo dian pian zheng que an zhuang hou gu zhang pai chu e.lq-1600kiii dian yuan ban tong dian hou feng shan yun zhuan ji miao hou
均未出再次拆开后反复安装都不见效只好请教庄工他经过几次安装上机测试发现下层针正常上层针全不出，反复检
jun wei chu zai ci chai kai hou fan fu an zhuang dou bu jian xiao zhi hao qing jiao zhuang gong ta jing guo ji ci an zhuang shang ji ce shi fa xian xia ceng zhen zheng chang shang ceng zhen quan bu chu fan fu jian
针都偏短，根据以往的经验只有去掉垫片才能解决，将打印头悲情母子拆开后去掉两块垫片，重新按好上机测试发现所有针
zhen dou pian duan gen ju yi wang de jing yan zhi you qu diao dian pian cai neng jie jue jiang da yin tou bei qing mu zi chai kai hou qu diao liang kuai dian pian zhong xin an hao shang ji ce shi fa xian suo you zhen
序片每个引脚擦拭干净后插上主板通电机器恢复正常。 d.dlq-2000缺画。 取出打印头发现所有
xu pian mei ge yin jiao ca shi gan jing hou cha shang zhu ban tong dian ji qi hui fu zheng chang d.dlq-2000 que hua qu chu da yin tou fa xian suo you
达驱动芯片没有问题，那悲情母子么最有可能是打印机程序片有故障，取出程序片通电机器一直处于等待壮态无动作，将程
da qu dong xin pian mei you wen ti na bei qing mu zi me zui you ke neng shi da yin ji cheng xu pian you gu zhang qu chu cheng xu pian tong dian ji qi yi zhi chu yu deng dai zhuang tai wu dong zuo jiang cheng
示各种报错信息如卡纸，说明主板cpu功能正常，问题有可能出在马达驱动和程序片，由于输搞电机正常说明马
shi ge zhong bao cuo xin xi ru ka zhi shuo ming zhu ban cpu gong neng zheng chang wen ti you ke neng chu zai ma da qu dong he cheng xu pian you yu shu gao dian ji zheng chang shuo ming ma
n##343），小车单元不动作，但输搞电机正常运转。 初步分析是主板有故障，经反复测试发现机器能显
n##343 xiao che dan yuan bu dong zuo dan shu gao dian ji zheng chang yun zhuan chu bu fen xi shi zhu ban you gu zhang jing fan fu ce shi fa xian ji qi neng xian
有故障更换后故障批排除。 c. canonfax-b210传真机，开机报错（显示悲情母子check pri
you gu zhang geng huan hou gu zhang pi pai chu c. canonfax-b210 chuan zhen ji kai ji bao cuo xian shi bei qing mu zi check pri
感器有问题，拆开机器取出传感器发现缺纸传感器与登记传感器相同，互换后机器检测不到纸张，说明登记传感器
gan qi you wen ti chai kai ji qi qu chu chuan gan qi fa xian que zhi chuan gan qi yu deng ji chuan gan qi xiang tong hu huan hou ji qi jian ce bu dao zhi zhang shuo ming deng ji chuan gan qi
分析认为故障部位在进纸以及纸张检测电悲情母子路部分，由于能检查到纸张说明缺纸传感器是好的，最有可能的是登记传
fen xi ren wei gu zhang bu wei zai jin zhi yi ji zhi zhang jian ce dian bei qing mu zi lu bu fen you yu neng jian cha dao zhi zhang shuo ming que zhi chuan gan qi shi hao de zui you ke neng de shi deng ji chuan
纸并报警（缺纸灯与错误灯亮），而且打印全白。 初步分析加热组件、激光器有故障，检测后未见异常。经过
zhi bing bao jing que zhi deng yu cuo wu deng liang er qie da yin quan bai chu bu fen xi jia re zu jian ji guang qi you gu zhang jian ce hou wei jian yi chang jing guo
更换后故障排除。 b．三星ml—4500打印机开机转状态正常悲情母子但打印自检时，纸张出加热组件有一半时卡
geng huan hou gu zhang pai chu b san xing ml 4500 da yin ji kai ji zhuan zhuang tai zheng chang bei qing mu zi dan da yin zi jian shi zhi zhang chu jia re zu jian you yi ban shi ka
，后经过测量电压发现pc2没有工作电压，更换r31后未能解决，测量zd31时的值不正常，怀疑有问题，
hou jing guo ce liang dian ya fa xian pc2 mei you gong zuo dian ya geng huan r31 hou wei neng jie jue ce liang zd31 shi de zhi bu zheng chang huai yi you wen ti
说明电路基本正常。采用模拟关机时，发现不能关机，说明关闭电路有故障，先后更悲情母子换q32、q31都未能解决
shuo ming dian lu ji ben zheng chang cai yong mo ni guan ji shi fa xian bu neng guan ji shuo ming guan bi dian lu you gu zhang xian hou geng bei qing mu zi huan q32 q31 dou wei neng jie jue
a．lq-670k电源板不通电。 经过检查q1、q2、q31、d2、损坏，更换后通电风扇正常转动，
a lq-670k dian yuan ban bu tong dian jing guo jian cha q1 q2 q31 d2 sun huai geng huan hou tong dian feng shan zheng chang zhuan dong