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Chaselight stopped running after crash (SOLVED) :-)

SpeelycaptorSpeelycaptor
edited November 2013 in Troubleshooting
Hi all,

Just finished the build and before soldering in the display. I powered on the unit according to the instructions , hit start button and had the chaselight running fine for a bit with the start button pulsing. Then the Lxr froze (leds lit, but Gui non-responsive) Upon powercycling the unit again the chaselight wasn't running again. :(
I finished soldering the display in, inserted the sd card with firmware (0.23)and the Lxr boots up fine. Display is working too. Start button lights up when pressed, but no chaselight . When using the vel probability and select steps, all 16 Leds of the sequencer light up, so i cannot be the Leds.
All other button are working fine too as far as i can tell and bring up the different menus
Any idea what i can try?

Thanks in advance,

Mike

Comments

  • SpeelycaptorSpeelycaptor
    I should add that the crash happend in the first place after i pressed some of the step buttons while the sequencer was running . Before soldering in the display and inserted the Sd card. Also checked that the tempo is set.
  • nightworxxnightworxx
    Hm, at first place i would try to update to 0.24a. This fixed a lot of problems like yours.
  • SpeelycaptorSpeelycaptor
    Thanks for the quick answer :-) - i'll try that and report back.
  • SpeelycaptorSpeelycaptor
    While i waited for my roomate, who has a card reader, i started fixing the step buttons with tape and when trying to power the Lxr, it wouldn't start at all. I measured the voltage and found that i only had 3,4 volt.
    After a couple of power cycles the Lxr would start again and voltage was back to 4,96. ( never got the 5volt)
    So next i installed the latest firmware which worked well and i got to the please reboot your device message.
    Upon powercyling the unit froze imediately with most of the Leds lit. Start button wasn't working and display blank. Next powercycle it would start ok, and i got the chaselight going for about 5 seconds, before the display freaked and displayed all kinds of weird characters. Measured the Voltage and it was only 4,19 Volt.
    On next start only a couple leds were lit and measured voltage was only 1,9 v. Wot!?
    Hm, so it seems my problem could maybe just the power supply? I use the Psu of my Alesis Bitrman pedal that
    Has the following specs: 9v ~ 0,83 A 7.47 VA. Shouldn't this work with the Lxr? Don't think the Psu is broken as it works fine with the alesis pedal. I'll dig for another power supply and will try that one of course.
    Could the cause be something different? I'm bit worried that the measured Voltage of the Lxr varies between 1,9 volt and 4,96. Can anybody recommend a certain power supply known to work fine with the LXR?

  • nightworxxnightworxx
    edited November 2013
    Best idea here is to measure the PSU. If it is an unregulated one with some years of lifetime, it is possible that i cannot deliver enough current to power up the LXR in a reliable manner. Even if measuring is ok, i would try a second, different PSU to rule this out as possible cause. If this doesn't work out you need a closer look in the area of the voltage regulator for cold soldering and measure the 7805 too. And btw. a tolerance of 5% in voltage wouldn't keep the LXR from working correctly. In the near past most of the 7805 regulator i used delivered less than 5 V. My LXR works with 4,85 V without any issues...
  • SpeelycaptorSpeelycaptor
    Been diggin' in the bin but only have 9v standard "boss" type psus lying around. Closest i have is a 9v /560mA 5.04 VA. Will buy one tomorrow and report back. Thanks for the support Nightworxx! Much appreciated
  • SpeelycaptorSpeelycaptor
    It's working now ! Tried the before mentioned power supply just for fun and now the chaselight is running fine for 5 minutes without crashes. Weeee" :-)) so glad the solution was that simple. Now off into the studio...
  • julianjulian
    Great that the problem seems to have solved itself ;)
    Please report back if the problem re-appears.
    I hope you did the continuity test between GND and +5V without beeping?
  • SpeelycaptorSpeelycaptor
    i only have a cheapo multimeter without continuity test, but i can do it at work.  The LXR has been running fine
    so far . left it running over night with the sequencer running and i'm in love with the sound. 
  • julianjulian
    as an alternative you can measure the resistance between those 2 pins. (that's how most of those beep testers work) if you have a short there is nearly no resistance... maybe a few ohm.
    if the resistance is above 1 or 2k you should be fine.
  • SpeelycaptorSpeelycaptor
    thx Julian, i'll try this tonight.
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