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Industrial electronics
Sabiem elevator identification of transistors and Zener diodes
184
hace 6 años
hace 6 años
I need help if anyone has worked with Sabiem electromechanical elevators. This brings several simple electronic cards, what I need is information about the transistors and the zener diodes, since old numbers cannot be seen, this card supplies two voltages, one of 20 volts, top and bottom -35 volts The twenty volts are fine but at -35 volts, there are only -23 volts.
Thanks in advance.
Annex photo of the card
hace 6 años
Second time you ask him to upload a copper side picture. I would not tell you a third time, I would directly forget the subject.
184
hace 6 años
I have not uploaded the photo from the back because I started to try some transistors and I managed to repair the card, we mounted it in the elevator and it worked well, when delivered. I thank colleague Juite for his parents as well as Jose Miguel.
184
hace 6 años
hace 6 años
I managed to decipher the numbers of the transistors of the -35 volt line, replacing them with some of the ones I had in my spare parts bank and the problem was solved. What happened is that the transistors for being very old the rust on their covers did not show the silkscreen of the pampering
44.317
hace 6 años
hace 6 años
Did you measure the tensions that feed both sources .. ??
If the - 35V is low, check the filter capacitor.
If it is greater than - 35V, you can move the SR41 multi-turn potentiometer, a couple of turns clockwise. If it goes up, it is regulating.
Comment results
184
hace 6 años
Already detect the problem was a transient marked with NTE159 damaged, and as Ennio Montene, the SR41 multiturn potentiometer, was at 300 ohms, 616 ohms being correct. It already worked and we mounted it in the elevator and this work.
Thanks for the support.
184
hace 6 años
Now I have another identical card but the fault is on the +20 Volt line. The problem is replacement transistors as they do not fulfill the functions of the original. The originals no longer get used to the market, what can I do?
Q40 2n2219A or BC141-16 What is the recommended replacement?
Q42 2N2904 or 852D
Q43 2N2222
It reaches 18 volts and stops when moving the trimer.
44.317
hace 6 años
It is preferable that you put a new query in Electronic forum and circuits, without component data sheet forum.
184
hace 6 años
Thanks Ennio I will do it. Thank you very much, best regards from Caracas Venezuela. The big problem we have here is that you don't get spare parts.
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