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EICO 430 3INCH 25MV 500KHZ 10-VALVES OSCILLOSCOPE 1953 SM

METER - SERVICE MANUAL
Type: (PDF)
Size
18.8 MB
Page
39
Category
METER
SERVICE MANUAL
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  • Also known:
    EICO 430 3INCH 25MV 500KHZ 10VALVES 1953 INCH 25 MV 500 KHZ 10 VALVES 10-VALVES
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  • See related repair forum topics below. May be help you to repair.
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Relevant METER forum topics:
Looking for Metrix MX53 Multimeter schematic
Hi there,
After many years of good services, I made a mistake while measuring UHV (ultra high voltagel with my  METRIX MX53) . I was measuring a voltage around 2500V DC with all the safety required, using a divider, to get only 1/50th of the voltage as I did many times.
But for some unknown reasons (I'm rarely distracted when playing with such letal voltage) , I didn't connect my clip at the divider but at the full voltage. 
You understand that the MX53 didn't appreciate it. 
I opened the multimeter, which is kind of sport as not as easy as it looks and found a resistor R1 (may be 200 ohms 5%, hard to read) completely exploded. I replaced it. I also found that 2 of the four varistors were shorted, changed them, I checked all the transistors, mostly SMD, but they all look fine as far as I can see. However, the multimeter is still not responding. 
I have also found 2 SMD diodes that could also be shorted and need to check them more thoroughly... 
I have very few chances to fix the meter but if I could put my hand on its schematic, It would be easier to track down the culprit, hoping it's not the proprietary chip in it. 
So, if someone have (or could lead me to a link to it) the circuit drawing of the MX53, preferably, or the MX52 or MX54 which look close to it, just a few functions more and the PCB looks common to both as the MX53 has some locations not populated with components, it would help me to try to save my old companion! 
Thanks in advance, any help much appreciated.!
Nota: METRIX is a French company, was also know as Chauvin-Arnoux.
Regards from France...! 
Ganzuniv műszerek javítását ki vállalja?
Üdv!
Keresünk számlaképes céget, vagy vállalkozót iskolában használt, zömmel Ganzuniv 1-3-4 típusú illetve HLA-2-es műszerek javítására.
Aki tud valami lehetőséget, kérem írjon.
Fluke 8050A DMM Kijelző hiba
Üdv!   Átnézve a netet, nem igazán találtam egyszerű megoldást a javítására.  Kissé összefolyt a kijelzője, több ponton, óvatosan megnyomkodva most lehúzódott a folt az aljába egy sávba. Tulajdonképen most használható lett, ha középen megnyomom akkor a folt eltűnik és tökéletesnek tűnik, de vissza mászik egy sávba .  Van erre valami megoldás, vagy kuka ?
Az EMG1162 szignálgenerátornak hogy néz ki a rádiófrekvenciás csatlakozója?
Sziasztok! Vateráztam egy szignált, és madzagot nem kaptam hozzá. A vasalózsinór nem gond, de a nagyfrekvenciás kimenete nekem ismeretlen aljzatos. A belső felépítése robosztus, vastag aluöntvény, nem lenne sem egyszerű, sem szép bnc aljat szerelni rá. Még képet sem találok róla a NET-en. Vakakinek nincs a ládafián, vagy legalább képe róla? üdv. T.
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