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  1. kellys_eye

    What are specs on this cap?

    112V DC at 20/21 seems ok as, with K1 energised, AC flows via contacts KM1 and C4 to the rectifier ZL2. This will provide the LOW clamping force at the magnet coil. I presume you're measuring 2.5VAC at 0/6 when power is applied but no button pressed? If you operate the toggle switch ( lid...
  2. kellys_eye

    Trying to identify a resistor network

    The 'common' pin is that one that it enclosed in its own white printed 'box' on the PCB.
  3. kellys_eye

    What are specs on this cap?

    0-1 looks ok it is the resistance of the mains transformer primary winding and we know this is working because 10-11 is ok. 2-8 is ok, it's the resistance of the thermal cutout. 10-11 is also ok. The stated secondary AC is 12V but is commonly higher by up to 10%. Irrelevant at this stage...
  4. kellys_eye

    What are specs on this cap?

    With everything back in place and with the power OFF test the following (use your meter on the 'continuity' setting i.e. 'beeper') 0-1 (around 900 ohms) 1-2 (around 900 ohms) 2-3 (open) 2-5 (open) 2-6 (open) 2-7 (short) 2-8 (short) 2-9 (open) 12-13 (short) 12-14 (short) 14-22 (short) 15-20...
  5. kellys_eye

    What are specs on this cap?

    No it's not. It gets power from ZL1 as well. Yes you do. It might not be known as neutral in the USA (you use 'hot' and 'ground') but check the wiring schematic. the 'N' mains input (neutral) connects to the '0' wires and this is what should be used as your reference 'ground' when measuring...
  6. kellys_eye

    Help with Keyboard PCB

    The 'key' just breaks an optical path between the IR transmitter and the receiver (marked CE). There is no magnet or anything else in there. Clearly there is a bit missing (manufacturing error) but the easiest way to fix it would be to remove an identical part from another key that isn't...
  7. kellys_eye

    What are specs on this cap?

    No. When measuring any AC Voltage you must put your meter negative lead on the mains Neutral i.e. wire 0. Measure the AC using the red probe at the relevant points asked. With all the wiring back to normal, disconnect 20 and 21 from the bridge rectifier. Power up and see if the magnet coil...
  8. kellys_eye

    What are specs on this cap?

    Measured with respect to WHAT? Where are your meter probes when you measure this? Did you disconnect 20/21 and then measure at the +/- terminals of the rectifier? DC. Disconnect leads 0 and lead 6 from the rectifier and measure the voltage on those leads (AC).
  9. kellys_eye

    Replace Resistor on Oster Trimmer

    It is an inductor. It should measure 'short circuit' with a test meter (as good as). Doesn't look damaged to me which leaves either the rectifier or the motor as the damaged item and given the type of equipment I'd say the motor is dud. Either way, you need a test meter to check the bits.
  10. kellys_eye

    What are specs on this cap?

    Measured with respect to what? And, with power OFF, how is this possible? Disconnect 20 and 21 (DC out of the rectifier ZL2) and with power on and NOTHING pressed, what do you measure at the + and - terminals of ZL2?
  11. kellys_eye

    What are specs on this cap?

    Again, with the power off: Measure from 1-2 and, at the same time, press the red STOP button. With the red STOP button pressed you should read open-circuit. Is this the case? Then measure from 15-20 then 14-22. Let me know the result.
  12. kellys_eye

    What are specs on this cap?

    With the power off, measure the resistance across the footswitch teminals (wires 1 and 2). It should measure open circuit. If it IS open circuit then there is no way you should measure DC at 20/21 - how would it get the power? SB2, SB3, KM1 or the footswitch MUST be closed to get power to 20/21.
  13. kellys_eye

    What are specs on this cap?

    The control board delivers the clamping voltage to the magnet coil as soon as ZL2 gets power - the amount of clamping as per above. The voltage to the magnet coil is only released when KM1 and KM2 are released and the STOP button pressed. This applies the low AC (actually pulsed DC) from ZL1...
  14. kellys_eye

    What are specs on this cap?

    So, you should have ZERO VOLTS at 20/21 until the START switch (or footswitch) is pressed. You will have (some low) DC volts at 20/21 when the start is active or footswitch is pressed (low clamp). You will have ~240V DC at 20/21 when the limit switch is activated (lever down, high clamp) All...
  15. kellys_eye

    What are specs on this cap?

    Sorry for all the editing - too late at night for my brain to work properly......
  16. kellys_eye

    What are specs on this cap?

    With SA on (power switch) you immediately get AC to ZL1. AC cannot pass any further in the equipment as SB2, SB3 and KM1 are all OPEN. The only way to get AC to go further is to press the footswitch or the start button. This passes the AC (mains) to KM1 (contactor) where one of its contacts...
  17. kellys_eye

    What are specs on this cap?

    You may (will) have blown a diode inside ZL1. What do you measure at 12/15? (bridge rectifier +/-)
  18. kellys_eye

    Optocoupler & mcu

    Got the spec (datasheet) for the ET1103?
  19. kellys_eye

    What are specs on this cap?

    No. The tests I suggest can be done without the board - indeed, the disconnects that I mention disable it completely.
  20. kellys_eye

    What are specs on this cap?

    Good for you following the recommended manufacturers advice as this would have been invaluable had the unit still been in warranty. Now that it is out of warranty I can say that there's nothing in there that would suffer in ANY way from the mains voltage being 248V i.e. 10% higher than...
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