knochenfabrik

@latigid on@Hawkeye Thanks for the input. My current situation is: DOUT: Had the whole module working fine - suddenly from nowhere the 2nd LED began to blink randomly so i reflowed the whole PCB and now everything looks good and working as intended. AOUT: After your first feedback I reflowed all the components you mentioned (IC4, 8RX, etc.) and to my surprise got channel 7 and 8 of the AOUT-module working fine. The other channels though didnt work as intended anymore and on J3 i measured pefect 5V on Pin 7,8. On the other pins i measure voltages from 3.6 (e.g. Pin 6) to 5.7 (e.g. Pin 1) and most channels of the DOUT didntt work as intended when using to control a VCO. So I thought to myself lets reflow all the other ICs and important Rs and Cs aswell. The result is that channel 7 and 8 (which I havent even touched this time) dont work anymore but channel 1-7works fine now. I still owe you a better picture with voltage information - but now that everything is twisted again I have to measure again and create a new picture :D

Unfortunately not - something strange is going on here...

Hello, again, I measure 0.01 V on R57 but no pins of the mentioned parts seem to be connected to ground. PIN 3,5,10,12 of IC4 are connected to ground (same for IC1 to IC3) though. Greetings, Alex

Made some progress and got 7 of 8 Channels on the AOUT-expander working by replacing all the cables involved . However, Channel 8 still wont output any Voltage and the LED keeps dimm. I already tried to switch to another octal board but the issues stayed the same. Hopefully I'll find the failure soon - are there specific pins on the ICs that could cause channel 8 not to work? Thank you for the help! EDIT: I disconnected all boards from the transmute board an powered it. On J3 i only measure -0.08 V on the 8th PIN (if counted from the top) - all other pins give ~-5V as you stated earlier. So i guess I come closer to the problem. :)

Yes, I have configured everything as shown in the manual. The configuration doesn't change the outputs though. LED 4 and LED 8 seem to do strange things on the AOUT-expander - first they both were dimmer than all the other LEDs and during testing LED4 even turned red... Maybe my cable is the problem: Tried to measure contuinity from the end of the J19 cable to GND and Vd on the LEMEC boards but it didnt work (used lemec since I cant reach the core-board easily). On the Core-board-schematic it shows that both rows of the J19 connector should have GND and Vd but I couldnt even find contuinity between the rows at the end of the cable that is connected to J19

I tried to use all of the AOUT-configs available in the system. I guess if I select AOUT Chn 1 in the Event-Page there should be uncalibrated CV on Channel 1 of the DOUT to begin with if i send Notes/Steps? However, I dont seem to have any output right now. Also, I observed that LED 4 and LED 8 of the DOUT-board are slightly dimmer than the other ones. Attached some poor pictures - I will try to take better ones if needed when there is daylight again. Thank you so much, Alex

Thank you very much, after the configuartion the DOUT works fine :-). Not so the AOUT though - I cant seem to make it do anything. Should the LEDs of the AOUT be lit up when nothing is sent? I use the midiphy-pcbs but replaced the MAX5500 with MAX525s since they had the same format. Greetings, Alex

Found the issue - had the connector from J8/9 to the Expander in the wrong polarity on one side. Now the sequencer starts up just fine with the DOUT and AOUT connected. Now I just have to find out how to use them. Just switching to AOUT on the Event-Page didnt do anything so far. Dont I have to configure the HW file for the DOUT? Also, is configuartion for the AOUT needed? I read in the manual that CH 1 to 16 should be allready routed to the DOUT but it also doesnt seem to do anything. When idle all LEDs are lit up on the AOUT, on the DOUT nothing lights up ever. Thanks in advance, Alex

Yes, there is no line transmit board involved. Cable length is approx. 30 cm. When i wiggle the cable out of the J8/9 while running, the sequencer changes menus and stuff on the screen by itself - if i deattach the cable completely i can use the sequencer just as normal. Which leads me to the next suggestion to check the cables which i will do now. Lesson learned: Debuging should be caried out before reassambling the whole unit

Hi guys, just finished my DOUT and AOUT modules. J8/9 goes directly from the LEMEC_R to the DOUT-module. When I turn the sequencer on it shows a strange menu (see picture). Do I have to conifgure something to use the module first or does this more look like a hardware issue? Thanks in advance, Alex

Hello, I´ve just received two samples of the MAX525 and now I am wondering if the new Aout will be based on those chips? Additional question: How could I add "activity" LEDs to the Aout that utilizes the MAX525 on Ucapps? Just attach them parallel to the individual Jacks? Thanks in advance, Alex

Actually you are right - I had to remove the rails and inserts of course (ur just use none). Got that wrong in my mind when I said they stayed insied earlier...

Could I just remove the Line Transmitter completely and use IDC cables to go directly from J8/9 to a DOUT board and J19 to an AOUT-board?

The rail and threaded insert stayed, I just left out all the screws that go in at the front and at the back of the SEQ4+ case, but there actually would have been enough space to let them in and still fit I think (its just easier to fit this way). Not using line drivers sounds very interesting, I`ll have to look into the expander-thing more to get what you say, but thanks for the information :-).

Hello guys, I dont know if this fits here but may I ask if there is any news on the Eurorack Expander Modules? Also, here is some bad-ish foto of some studio action. The midibox-case fits really well into 84hp and powers well from the 5V source of my Intellijel PSU. Just in case if someone was wondering if the SEQ4+ is suitable for modular case installation. I am using standard 40x20x2 aluminium angles for the rack mounting. Next step: Re-open the case and install the missing jumper for USB OTG :D. Greetings, Alex