<html><head/><body><div class="mail_android_message" style="line-height: 1; padding: 0.5em">Hello list - hello Julian....<br>
I guess you already checked everything round that flip flop, resistors, diodes etc... To me there are also reasons to suggest a problem with power supply, maybe you check that also before soldering that dsp... And think about the possibility that it could be the flash, also. Like to hear what you are discovering. Greets Christian<br>
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<meta name="viewport" content="width=device-width" /><meta http-equiv="Content-Type" content="text/vnd.ui.secure+html;charset=utf-8" /></head><body style="overflow-wrap:break-word; word-break: break-word;"><div class="mail_android_quote" style="line-height: 1; padding: 0.3em">Am 23.02.2017, 15:24, Julian Schmidt <elfenjunge@gmx.net> schrieb:<blockquote class="gmail_quote" style="margin: 0.8ex 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;">
I have a broken microQ in the workshop right now.<br />
It arrived with a scrambled LCD that only showed garbage.<br />
<br />
after opening it up I saw someone butcher the D-Flipflop (bend and<br />
shorted pins)<br />
after replacing it the unit boots again, waldorf welcome screen, os2.2,<br />
then preset name.<br />
<br />
yay!<br />
<br />
bad news is the unit immediately freezes. No buttons and encoders do<br />
something. :(<br />
<br />
I tried the firmware update but on reveiving the sysex data the power<br />
button makes a quick flash, 4 or 5 vertical bars appear in the LCD and<br />
then nothing happens. Pingpong chaselight on the Inst. 1-4 LEDs and the<br />
message "please play back dump" or something like that in the screen.<br />
<br />
In factory test mode all buttons, LEDs and encoders work.<br />
Audio out test does not work (silence on all outs)<br />
and the DSP test fails.<br />
it only shows:<br />
<br />
1:----- 2:----- 3:sig!<br />
<br />
and repeatedly flashes "DSP REBOOT" every second.<br />
<br />
So my guess is that I have a broken DSP.<br />
<br />
Is it worth it to try and replace the DSP? they are still in stock at<br />
digikey.<br />
But I am open for other ideas since I'm not keen on desoldering the LQFP144.<br />
<br />
Best,<br />
Julian<br />
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</blockquote></div></body></html></body></html>