yaelblaze

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  • 08.02.2019 at 17:53 in reply to: Missing or low voltage at point TP4 #12695

    yaelblaze
    Participant

    You also might want to check this.

    We are aware of cases when the ULN2003 microcircuit failed (it has a very low resistance between the terminals), and this led to the burning of the diode on the Arduino.
    Normal resistance between GND TP and terminals 1,2,3,4,5,6 is 5kOhms – 9kOhms

    08.02.2019 at 17:50 in reply to: Only 11,45v on TP2 #12694

    yaelblaze
    Participant

    Does it haappen for you guys that Q1 is really hot ?

    08.02.2019 at 17:00 in reply to: Incorrect voltage on TP (1->4) #12692

    yaelblaze
    Participant

    .

    • This reply was modified 5 years, 10 months ago by  yaelblaze.
    03.02.2019 at 21:18 in reply to: Incorrect voltage on TP (1->4) #12684

    yaelblaze
    Participant

    Finally I have got the 150 volts on TP 4 with the tubes soldered

    However the tin on Q1 started melting!

    I cannot increase the voltage, what could it be?

    • This reply was modified 5 years, 10 months ago by  yaelblaze.
    03.02.2019 at 20:28 in reply to: Incorrect voltage on TP (1->4) #12680

    yaelblaze
    Participant

    Today I realized the ground on the other side of the board was other pin, It means that I have tested TP1 wrong 🙁 So it was fine all the time

    – I also checked continuity in all pins of U2 and U1 without resistors to NX mounts.
    – I also checked the rest of U2 and U1 pins and they are well soldered.

    But still I am having 11,5v in TP4

    Tp1 12
    Tp2 12 v
    Tp3 4,7v
    Tp4 11,5v

    • This reply was modified 5 years, 10 months ago by  yaelblaze.
    • This reply was modified 5 years, 10 months ago by  yaelblaze.
    • This reply was modified 5 years, 10 months ago by  yaelblaze.
    03.02.2019 at 04:29 in reply to: Incorrect voltage on TP (1->4) #12678

    yaelblaze
    Participant

    .

    • This reply was modified 5 years, 10 months ago by  yaelblaze.
    01.02.2019 at 17:53 in reply to: Incorrect voltage on TP (1->4) #12673

    yaelblaze
    Participant

    Ok, I have checked U1 and U2 regarding the dot reference and they are installed correctly.

    I have some photos reference. Google Link Photos

    31.01.2019 at 21:44 in reply to: Incorrect voltage on TP (1->4) #12670

    yaelblaze
    Participant

    Hello again, apprently my power source was not that good. I changed it for a larger one that can push 1,5 amps and 12 volts.

    No I can see the initialization LEDs and hear the pink panther song.

    And this is what I have

    Tp1 12,2
    Tp2 12 v
    Tp3 4,7v
    Tp4 30v (no matter how much I move the variable resistor )

    Plus the temperature sensor in TEM1-1 was almost melting. I removed it but no change.

    I will check the U1 and U2 regarding the dot, I used the smashed corner as reference.
    I wil send the pictures also.

    Thanks!

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