New Alcatel SERV 3DB02155AA
Wonderware InTouch Development 1000 Tag FS2000/9.0 New
HAAS BRUSH ROTARY CONTROL F Board 32-3051F 93-1135 NEW
三.功能与参数测试
1.对器件的检测,仅能反应出截止区,放大区和饱和区.但不
能测出工作频率的高低和速度的快慢等具体数值等.
2.同理对TTL数字芯片而言,也只能知道有高低电平的输出变化.而无
法查出它的上升与下降沿的速度.
四.晶体振荡器
1.通常只能用示波器(晶振需加电)或频率计测试,万用表等无法测量,
否则只能采用代换法了.
2.晶振常见故障有:a.内部漏电,b.内部开路c.变质频偏d.外围相连电
容漏电.这里漏电现象,用的VI曲线应能测出.
3.整板测试时可采用两种判断方法:a.测试时晶振附近既周围的有关
芯片不通过.b.除晶振外没找到其它故障点.
4.晶振常见有2种:a.两脚.b.四脚,其中第2脚是加电源的,注意不可随
意短路.
五.故障现象的分布
1.电路板故障部位的不完全统计:1)芯片损坏30%, 2)分立元件损坏30%,
3)连线(PCB板敷铜线)断裂30%, 4)程序破坏或丢失10%(有上升趋势).
2.由上可知,当待修电路板出现联线和程序有问题时,又没有好板子,既
不熟悉它的连线,找不到原程序.此板修好的可能性就不大了.
IPC Alliance MX ALIC Card NEW
GUTOR 640-4049A Rev 2 Controller Board 0P0360 NEW
Cooper Cleco STMHE for TMEM TME Controller Refurbished
Alcatel P8S1-4E 3AL98240AA for 1662SMC
Alcatel P3E3T3 3AL78864AA for 1662SMC etc
Alcatel P63E1 3AL79092AA for 1662 SMC etc
ALFA LAVAL Decanter Core Controller 6121.1227-01
Nortel Multiservice Switch 15000 SHELF New Spare
Cisco Unified Communications Manager CM6.1U4-K9-UPG=
Lot 2K Atmel ATA5743P3-TGQY ATA5743 UHF Receiver $1.25p
NORTEL NTHW08CA Mss 15000 Control Processor (cp3) Modul
New NIDEC SANKYO SC3150 Robot Controller 200/230vAC
CG171A-T003-05 Reflector Film UX188 etching mould USED
CY7C1414SV18-250BZC CY7C1414 Chips $29/each
Agilent G3431-60531 FID EPC Manifold New
PELCO Esprit ES31CBW24-2W-X IOP 24X High Res PAL
VUTEk 3360 Controller Board Assy AA90206 Rev B NEW
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Alcatel 3AL97690AA LC-ESC board NEW
lot 520 iKANOS Fusiv IKF68331-A1-PB1-C chips $4/each
RICOH Z-folding Unit ZF-4000 for MP6000 MP7000 MP8000
LINEAR LTC1430CS#TR Voltage Regulator chips
Cooper Cleco STMH for TMEM TME Controller Refurbished
NSK HR32060XJ Taper Bearings NEW
Alcatel SWL-B LHR R2.0 FEE License Certificate
ABB Motor M3AA200MLA 4/8 3GAA208207-BDC 220KG NEWinbox
MacGREGOR C000071 cabin display Crane Computer CCP XS
Thrane & Thrane Sailor TT-3606E Message Terminal New
Agilent G1888-60704 G1888A Enhanced PM Kit NEW
NORTEL NTHW18BB 6mPKTservSP function processor
PACKETEER PacketSeeker 9500 PS9500-L000M-2000 NEW
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