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1796等系列)，施耐德（140系列），GE,西門子，安川，發(fā)那科，基恩士，莫迪康等品牌下的各種產(chǎn)

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工控電路板電容損壞的故障特點(diǎn)及維修

電容損壞引發(fā)的故障在電子設(shè)備中是*高的，其中尤其以電解電容的損壞*為常見。

在工控電路板中，數(shù)字電路占絕大多數(shù)，電容多用做電源濾波，用做信號耦合和振蕩電路的電容較

少。用在開關(guān)電源中的電解電容如果損壞，則開關(guān)電源可能不起振，沒有電壓輸出;或者輸出電壓濾

波不好，電路因電壓不穩(wěn)而發(fā)生邏輯混亂，表現(xiàn)為機(jī)器工作時(shí)好時(shí)壞或開不了機(jī)，如果電容并在數(shù)

字電路的電源正負(fù)極之間，故障表現(xiàn)同上。

這在電腦主板上表現(xiàn)尤其明顯，很多電腦用了幾年就出現(xiàn)有時(shí)開不了機(jī)，有時(shí)又可以開機(jī)的現(xiàn)象，

打開機(jī)箱，往往可以看見有電解電容鼓包的現(xiàn)象，如果將電容拆下來量一下容量，發(fā)現(xiàn)比實(shí)際值要

低很多。

電容的壽命與環(huán)境溫度直接有關(guān)，環(huán)境溫度越高，電容壽命越短。這個(gè)規(guī)律不但適用電解電容，也

適用其它電容。所以在尋找故障電容時(shí)應(yīng)重點(diǎn)檢查和熱源靠得比較近的電容，如散熱片旁及大功率

元器件旁的電容，離其越近，損壞的可能性就越大。





產(chǎn)品型號：

0-1250um Paint Coating Thickness Gauge Tester Meter MCT200
1 Rln. Leitungen: Flachband; 1,27mm; Line; Cu; 60x26AWG; PVC; 49V; 30,5m


1 St. Digitaler Multimeter; LCD 3,75 Ziffern (6000); True RMS AC


1 St. Entw.Kits: evaluation; Interface: UART; Kommunikation: USB


1 St. Lautsprecher; Tieftonlautsprecher; 300W; 8?; Lautst?rke:90dB


1 St. Netzteil: Impuls; 480W; 24VDC; 20A; 85÷132/176÷264VAC; Montage: DIN


1 St. Netzteil: Labor; Kan?le:1; UAusg:0÷30VDC; UAusg2:0÷30VDC; 3A; 30A


1 St. überspannungsbegrenzer; Typ 1+2; Anz.Pole:4; 255VAC; Montage: DIN


1 St. Vektor-Umrichter; Max.Motorleistung:2,2kW; Ausg.Spannung:0÷10V


100M 1.5mm 21Amp 12v Of All 11 Colours Wiring Kit Auto Automotive Cable Wire


110 V 63A IP67 2P+E Famatel Surface Mount Appliance Inlet (1060)


110 V 63A IP67 2P+E Famatel Trailing Cable Plug (9055)
16.0mm 2 Core + Earth Orange Circular Electrical Cable 100mtr Roll


22 kW Star Delta Starter, Motor Starter, Pump Starter
230 / 240 V 63A IP67 2P+E Famatel Trailing Cable Plug (9059)
30 Stück,Lumberg Feldanschluss, Mini, 7/8 "Stecker 3-polig mit Schraubverschluss


3000W DC/AC converter modified sine wave 12V/230V
32 Amp 50m Heavy Duty Extension Lead: 3 Phase,4 pin,415V. Cable CSA:6mm2.


400 / 415 V 63A IP67 3P+E Famatel Trailing Cable Plug (14304)
5 Core 25mm HO7 H07 RN-F Black Rubber Flex Cable Per Metre Meter from ￡20.10 p/m


5 Core 35mm HO7 H07 RN-F Black Rubber Flex Cable Per Metre Meter from ￡19.76 p/m


6kA gem?? EN 60898, IEC 60947-2 Siemens VPE: 10 Stück
714-030098-006 Housing Lower Match Enclosure VCI, Lam research
84904M - KEYSIGHT. ATTENUATOR 0 TO 11DB STEPS
87x Marquardt 1660.0202 240V 16A Grün Druckschalter -unused/OVP-


978-001-003, SATTConTROL XD24R PART NO 978001003
ABB 200-APB12 Remote Adapter Module 8PT ! WOW !
ABB AB00289868 SACE Circuit Breaker 600A 3Pole ! AS IS !
ABB Noratel 3HAC024144-001
ABB SACE ISOMAX S3 N 250 R250 250 Amp 3 Pole circuit breaker Code 1SDA013493R1


AC power supply bently nevada
ACKSEN 3 Phase Current Logger (20-3kA)
AGILENT (HP). Digital Microwave Power Meter - 437B-003
AGILENT HP 70004A MAINframe SPECTRUM ANALYZER F947
Agilent Technologies 8111A
Allen Bradley 8500-HDI0 I/O Module 24VDC Hugh Density ! WOW !
Allen-Bradley / Prosoft CompactLogix MVI69L-MBS Communication Module


Alltech Digital Flow Check Meter 4700 NIST Traceable
AM 4204 Hot Wire Anemometer NEW LUTRON AM4204
ANRITSU ML-8720A - W-CDMA AREA TESTER WITH MM-800681A - 2110 to 2200MHz G139


Asea Brown Boveri SNAT-7050 Control Board ! WOW !
Batch(10) SICOM STEIN SOHN Germany U-Tube MANOMETER +60mm to -60mm Water Column


Bauer CFG00-111-DK94-216 Getriebemotor mit Bremse GBR 75 "Warranty"


BHKW Schaltschrank Kuhse Steuerung Blockheizkraftwerk
Bird 4381 Thruline RF Directional Digital Power Meter .45 - 2700 MHz 100mW-10kW


BLACK TRI RATED CABLE 0.5MM - 35MM SOLD PER METRE,10M,25M,50M OR 100M DRUM


BLUE TRI RATED CABLE 0.5MM -35MM SINGLES SOLD PER METRE,10M,25M,50M OR 100M DRUM


BOONTON. RF Millivoltmeter - 92BD
BORAIDENT Sidelight Licht Bora Ident Reader ID system
Brooks SLA5860S1CAA0C2A1 Smart 2 Mass Flow Meter ! NEW IN BOX !
BROWN TRI RATED CABLE 0.5MM - 35MM SOLD PER METRE,10M,25M,50M OR 100M DRUM


C1707010 - ALSPA CEGELEC C170 RACK C170/7010 / NEU HINTERGRUND KORB


Carl Zeiss Tessar 2.7 4cm 40 Kinamo 35mm lens mount film movie camera


Charmilles 8121550-D Power Supply Board ! WOW !
CM1000HA-28H- Modul / Elektroteile / Schleifscheibe
Converter Concepts VT100-441-10/XH Power Supply ! WOW !
Cutler Hammer F1S04C Flex Shaft Handle Mechanism 4' Cable WOW
Digital VDSL2 /xDSL /ADSL2+/ADSL/DMM Line Network Meter Tester ST332B Portable


DISC Archiving Systems DISC 1000 Jukebox
Duty standby Dual pump control panel 2x2.2 kW
EARTH TRI RATED CABLE 0.5MM - 35MM GREEN AND YELLOW X1M,10M,25M,50M OR 100M DRUM


EIDEL/ EIDSVOLL EE4100 PCM Synchronizer Decoder S/N 69 10Hz-2MHz RS-232 IEEE 488


EKF Elektronik Widerstandsdekade 03272-D-S 03272D GEB
Endress Hauser 52017196 Cerabar PMC71 ! NEW !
Exfo FTB8510B - Ethernet Tester 10/100/1000M Dual Port EtherSAM
Festo SPC11-POT0LWG End Position Controller 24VDC 15-pin Connector ! WOW !


FIP400 - EXFO. 200x/400x Video Probe
Fluke - FLUKE 375 FC - Clamp Meter, Digital, Hand Held
Fluke 376 FC Echteffektiv -Strommesszange Gleich- und Wechselstrom mit iFlex?


Fluke 568 F568 Handheld IR Thermometer Infrared IR Thermometer With Lcd Display


Fluke Multimeter 115 & Insulation Tester 1507 Plus Accessories (Open To Offers)


Fluke Netscout linkSprinter 300 LSPRNTR-300 Netzwerktester Network Tester POE


FX84A7 MITSUBISHI FX84A-7/ BN624A353H02 CIRCUIT BOARD USED
GE Fanuc PWB68A993530G1 Component Card ! WOW !
GEC GE MINI FORM 200AMP 3 PHASE SWITCH FUSE CMMT200 404195
General Electric 6VFW1033 Statotrol II Adjustable Speed Drive Control 1/3HP! WOW


golden mask 5 metal detector with 9" spider coil and wireless headphones


Grey Tri Rated Cable | 0.5mm - 35mm | 1M, 10M, 25M, 50M or 100M Drum


GREY TRI RATED CABLE 0.5MM -35MM SINGLES SOLD PER METRE,10M,25M,50M OR 100M DRUM


GW INSTEK - SFG-2110 - FUNCTION GENERATOR, 10MHZ
Hager HA360 Lasttrennschalter 800A 3 polig 311967
HBM Kraftaufnehmer W?gezelle U2A 500 kg Load Cell Hottinger Baldwin Messtechnik


HCJYET HT-8878 High Temperature Industrial IR Infrared Thermometer -50～1850℃,


HP 8496H Optionen 002 + 008, Durchgangsabschw?cher, Attenuator, geprüft, tested


HST3000 - JDSU. ADSL2+ Annex A DVOM SIM (Conexant) CE Marked
HST3000 - JDSU. Infineon VDSL SIM with WB2 copper
HT 3009 Precision Humidity + Temp. + Dew Point LUTRON
IFM AC1144 Adressierger?t/Adressing Tool - Neu/New
Indramat MAC 025B-0-ZS-3-E/040-B1,Speedometer EMK and Brake+IMG
Infineon G8AD Powerblock TZ740N22KOG - NEU - OVP
JDSU. SmartClass ADSL2+ Anx A combo Cu&DSL Gold
KARTELL 0421309 TOPTOP Black square base aluminium table - 1 pezzo PRESENTATION


KARTELL 0421309 TOPTOP Schwarz platz basis aus aluminium tabelle 1 pezzo


KARTELL 04895MM MADEMOISELLE G?NSEBLüMCHEN kleiner sessel - 1 pezzo BELICHTUNG


KARTELL 09250.03 BLOOM WHITE lamp suspensions 1 pezzo - PRESENTATION


Kewtech Kyoritsu 2433R True AC Erdschluss Zangenamperemeter
Keysight - AC68GPBU - Upgrade - user installable GPIB interface board


Keysight / Agilent N2263A 32-Bit Digital Input/Output Module for 3499x / 34980A


Krohne Level-Sonic BM 90 / panel mounted converter / guter Zustand


Laser Trident 2- metal Detector with 11" x 8" widescan coil + coil cover


LED Kennleuchte Rundumleuchte Warnleuchte Rundumkennleuchte Magnetmontage 10-30V


Lenze CS9000 DVI G-2032 TFT touch panel 19" Display Sharp LQ190E1LW01


Lenze USV 24V/100 interruption-free Power Supply 24V/100W art. no. 2500


LQ121S1DG41 12.1" TFT-LCD MODULE MATRIX SHARP ID13909
Lutron DT-2299 Digital Combination Stroboscope Laser Photo & Contact Tachom


MARPOSS E86 - Sendermodul Funk Akt. EU - *TOP PREIS*
Martechnic Twin Check Vario Lube Oil Test Kit For 2 Different Test


Martel TC-100 Thermoelement Pr?zisionskalibrator
MEM MFL1253 125A MCCB Circuit Breaker Triple 3 Pole Phase
Midtronics Honda EXP-1030 Batterietester Batterietestger?t mit Drucker


Mitsubishi CPU MODULE 124K-STEPS Q12HCPU
Mitsubishi GOT2000, 3.8 in LCD Touch Screen HMI, Monochrome - 24 MonTH WARRANTY


Mitsubishi PM100CHS060 Transistormodule
Moeller N64-100 +v Hi 001-N6 4pol. Leistungstrenner 100A Nr.089
Moeller N64-63 4pol. Leistungstrenner Hauptschalter 63A Nr.080
mütek infrared TLS 100 LD + TE Controller
NEW AMG-12OPHA01N1 DC12V 4A AMonGO 12M WARRANTY FREE EU SHIPPING ID8435


New Digital LCD pH/mV/Temperature Meter & Electrodes PH Tester PHS-3G


NEW LISTING?ALLEN BRADLEY ROTARY SERVO MOTOR MPL-B153OU EJ72AA MP-SERIES MPL 

STOCK#BD84
NEW LISTING?Digital Timing Belt Changer Tighten Voltage Tester Toothed Tension 

Testing BGS
NEW LISTING?FLUKE - 1587 INSULATION MULTIMETER *BNIB*
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NEW LQ10D42 LCD MODULE MATRIX SHARP ID3462
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OMRON Interactive Display NT20S-ST121B-EV3
Omron Inverter Frequenzumrichter Sysdrive 3G3JV, 400V, 3 Phasen, 4,0 kW


Omron V600-CA8A-V2 PNP RFID Controller V600CA8A ! WOW !
OPM/4C - NOYES. Optical Power Meter
Pattern Processing Tech 661-0056 Controller ! WOW !
PeakTech 5605 W?rmebild Thermometer Kamera Temperatur Ger?t Messger?t Messer


Philips Fluke PM 5138A Funktionsgenerator 0.1 mHz - 10 MHz
PUMA4200E - CONSULTRONICS. Puma E1 Telecom Datacom Analyser
Radar Signalgenerator Signal Simulator Test Set SM-674/UPM SM-736 C- & F-Band RF


RED TRI RATED CABLE 0.5MM - 35MM SOLD PER METRE,10M,25M,50M OR 100M DRUM


Rittal 7830670 Serverschrank Netzwerkschrank Schaltschrank mit Sichttür


Rittal SK 3255500 Schaltschrank-Kühlger?t
ROHDE & SCHWARZ CRTU-PU, 1138.7000.02, S/N: 100022, Universal Protocol Tester


Rohde & Schwarz DVG MPEG2 Measurement Generator
Rohde & Schwarz HF Millivoltmeter URV3 10kHz - 2GHz inkl. Tastkopf 0,1-1000MHz


Santon 50AO778 250A 1000V DC-Trennschalter Solartrenschalter NEU Trennschalter


Schaltschrank mit Kühlung (Wasser) Steuerschrank Schroff 60 x 80 x 205 leer


SCHATZ 5413-2355M Drehmomentprüfger?t Torque-Measuring-System+Box for 6 Sensors


SCHNEIDER LC1D115004P7 Tesys contactor 4P (4 NO) AC-1 = 440V 200A 230 coil


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Siemens Contactor 3RTF 463RT1065-6AP36
Siemens ID361NF Duty Switch 30 Amp 600V ! NEW !
Siemens Sicherungsautomat Leitungsschutzschalter 10A-32A 1/3-polig Typ B oder C


Siemens Sicherungsautomat Leitungsschutzschalter 5SL6310-7 10A TypC 3polig 10Stk


Simons Voss Scharfschalteinheit BS.Schalt.VDS.M.AV
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Tektronix Tek TDS1002 Digital Storage Oscilloscope Oszilloskop 60MHz 1G/s FFT


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