NC314 KIT v2.3 starts but tubes don't light up

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This topic contains 3 replies, has 2 voices, and was last updated by  frans 4 years ago.

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    Posts
  • 05.09.2021 at 15:12 #38873

    frans
    Participant

    I have a very similar problem to this one: https://gra-afch.com/forums/topic/help-nc314-2-2-starts-up-but-no-tubes/ except I have a DIY kit with board version 2.3 with a 12V 2A power supply

    LED’s light up, pink panther sound can be heard, but the tubes stay off. FW sais:

    Firmware version: 1.940
    NCS314 for HW 2.x HV5122 or HV5222
    Start Test
    000000
    111111
    222222
    333333
    444444
    555555
    666666
    777777
    888888
    999999
    019400
    019400
    Temp. sensor not found.
    DS3231_T=29
    Stop Test

    Can you provide some hints how to debug this. Do you have reference pictures / voltages for v2.3

    Thanks a lot!

    06.09.2021 at 11:02 #38874

    Gra Afch
    Keymaster

    Hello.

    You should first check the Power Supply.
    If Tubes do not light up it means the Board do not receive enough power.
    Please do that first.

    10.09.2021 at 11:56 #38965

    frans
    Participant

    I tried that – the supply stays at 12V (quite precisely) while the tubes _should_ show 111111…999999.

    Q1 (the power transistor) seems to get hot very quickly, and C15 (the big capacitor) seems to warm up faster than it should

    19.09.2021 at 10:00 #39018

    frans
    Participant

    So can you provide some voltage reference points as in https://photos.app.goo.gl/Cz9PnqB14MxTdhIy1 for the v2.3 board, too?

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