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  1. docroot

    Ultrasonic cleaner circuitry repair

    I was fastinated watching the bath as I turned on the cleaner... surface junk came off like tendrils of smoke in the water. This cleaner makes them clean down to the tiniest ports and channels... very thorough! It will be a while before I can try it in a bike, though, as I am recovering from...
  2. docroot

    Ultrasonic cleaner circuitry repair

    Oh yes, here's the circuit diagram (descriptor style)
  3. docroot

    Ultrasonic cleaner circuitry repair

    IT WORKS! Yahoo! So, in this curcuit the MJ1618J replaces the SJ9089A, wired in "matchy-matchy", and it has worked thru 6 cycles of 15 min each. I have read elsewhere that this substitution didn't work for more than one cycle, but that may be problems in the other-guy's circuit that I didn't...
  4. docroot

    Ultrasonic cleaner circuitry repair

    OK, I am ready to do that. Please review my intentions and cross check it against my circuit drawing to see if it mekes sense On the transistor, when the printing is "up", the offset of the pins is "up" too. My photo of the MJ1618J (posted above) shows continuity when the red testlead is on the...
  5. docroot

    Ultrasonic cleaner circuitry repair

    LOL! Yes it's a lot of carb with yards of tiny passageways. I got the MJ16018 Transistors but am not sure how to put them into this circuit as the ones being replaced have continuity in all 6 directions. These have continuity with a milivolt analog tester in only one direction How should I...
  6. docroot

    Ultrasonic cleaner circuitry repair

    Thanks Olivier I need the size of this one, 11 liter is just big enough for a half carbset for an antique Goldwing GL1000, and that's what I do with this cleaner. I got this without a basket which concerned me until I saw that I wouldn't have been able to fit the carbs into the basket anyway...
  7. docroot

    Ultrasonic cleaner circuitry repair

    I called the PLCCenter and they were gracious but only had one, used, and a $50 minimum. They are selling the same one on Ebay for $35, but I need 2 anyway, so I am more inclined to go for the (maybe) substitute of MJ16018 ($5 ea) and see if it works
  8. docroot

    Ultrasonic cleaner circuitry repair

    The Transistor is a Motorola #SJ9089A, which is aparently obsolete. I find a recommendation for MJ16018, which is available on Ebay, and I have made an offer. you'll need to find out why they failed The transistor is bedded to the heatsink with thermal grease, so I know that heat is an...
  9. docroot

    Ultrasonic cleaner circuitry repair

    The Transistors have continuity in all 6 directions SJ9089A 9309
  10. docroot

    Ultrasonic cleaner circuitry repair

    I have isolated the diodes and TTAMs, and they test OK... now for the transistors
  11. docroot

    Ultrasonic cleaner circuitry repair

    Thank you! I will isolate the diodes, the TTAMs and the transistors for testing. How can I test a transistor with a multimeter? Do I assume the two wires coming out are the emmitter and collector, and the shell is the base? Should the emmitter amd collector have high or infinite impediance...
  12. docroot

    Ultrasonic cleaner circuitry repair

    Thanks Olivier I have finished diagraming the circuit I am surprised at the capacitors between the lines-in, but I looked and looked and that's how it's wired. The fuses are not common to anything so there must be two faults. The only "parallel testing" I have done is on the...
  13. docroot

    Ultrasonic cleaner circuitry repair

    I have a "Baxter" Ultrasonic cleaner Model ME11. I have seen elsewhere the guts for Metzler ultrasonic cleaners, and they are identical. I bought my cleaner on ebay and was using it to clean a motorcycle carb, and it quit half way thru. Investigation showed two 2A blown fuses which I replaced...
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