| Electronics > Repair |
| Prisma elevator door controller, damaged psu, need identify components |
| << < (5/8) > >> |
| Harry_22:
Some more thoughts. There is no point in installing Q32 just to start the controller. Most likely something else is being powered there, take a look. If transistor Q32 is shorted on all pins then it is most likely a MOSFET. Resistor R114 is marked with the first brown stripe, please check it. I set it to 100k but when applying high tension it will not burn like that. Looks like he's about 10 kilos. |
| Harry_22:
I corrected the circuit digram. Due wake up resistor is replaced here by stabilized power supply on Q32 the controller should be with lower start threshold i.e. UC3843 or UC3845. Seems all the zener diodes Z1,Z4, Z7, Z13 and Z14 are the same. |
| PiotrMisiuna:
I'm ordering the parts. it will take a while, Cyprus shipping is like 3 times the usual. I'll share results as soon as possible. |
| Harry_22:
--- Quote from: PiotrMisiuna on December 08, 2024, 09:48:46 am ---Cyprus shipping is like 3 times the usual. --- End quote --- Yes, life is't easy for you :) |
| Greybeard:
Don't forget to replace the blue bulged electrolytic cap. |
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