hei.
i built the mb-6582 from an old kit…
the 3 slave cores, provides a working a LCD, but not on the Master-Core, there i only see black-blocks…
when i boot up the SID, i have Blocks all over the screen, then it refreshes, and i have blocks on first and third row off the display.
What can be the problem?
I already measured the connections from J15 to the PICs Pins.
checked all J15 and PIC pins for Shortens against Neighor pins, and to ground and to +5V
also removed all Shiftregisters, and Bank-sticks, and SIDs (is it necessery to have the Shiftregisters connected?)
I also checked the SI-Pin off the HC165 - but they are not grounded or 5V…
i also placed in a PIC from a working unit - and it is still black (so it is not the PIC)
I already replaced the oscillator
i checked all Resistors for their value - seems to be right…
(i can upload new code, so it boots up proberly… also newest bootloader is on the PICs)
Looks like this is just a very easy problem with contrast an lumi potis?
I would look out for bad connections, also. I guess it’s just a mechanical problem not complicated.
thx got it… it was the ground pins… which are surroundet wit massive groundplanes (without traces that could make a thermal decouple). i heatet the.groundplane.with hot airgun,.and soldered all groundpins.again… worked " now.it says “sid 4 not aviable no mb net response” core is working, checked it by connecting a lcd to it… also reuploaded the firmware with id3… is the net a com between cores or between sid and core?
about MB-NET
http://www.ucapps.de/midibox_sid/mbsid_v2_communication.pdf
http://www.ucapps.de/mbhp/mbhp_core_v3.pdf
http://www.midibox.org/dokuwiki/lib/exe/fetch.php?media=mb-6582:mb-6582_base_pcb_r2_color.pdf
already resoldered all pins on core 3 and 4
replaced the pic 4 with a new pic…
measured the can bus wires and diodes, replaced the Diode for core 4
removed R6 from core 4
reuploaded code for core 1 (aka 0)
on the automatic reboot of mios, it didnt tell me that sid4 no mb-net… but after power off-on it says again: no response…
ok it also tells me on startup:
1st screen:
mios v 1.9h tk....
2nd screen:
[not here!] version 2.044 launching cs
(what is not here???)
3rd screen:
sid 4 not aviable no mb net response
Guess you’re at the right side of finding it. Also guess it’s just a bad solder point, connection thing.