Alasdair Moon Posted September 26, 2017 Report Share Posted September 26, 2017 (edited) Hi all, finally I finished the breakout for my +-15V Synth. Midibox recognises the AOUT and DOUTx4, Gates /Clocks and triggers work perfect, but I get no CV signals. I already measured every connection on the AOUT -- all seems to be fine. LED is on when connected to the Receiver. The PINs 4 and 11 of the TL074 have the correct 15v. The PINs of the DAC are all soldered good and checked, that they have connection to the corrsponding PINs of TL074. I struggle a bit with the connection between the Line Driver Receiver and the AOUT. The PINs on the Receivers JAOUT are named SC / SO / CS / Vd / Vs the INs on J1 of the AOUT are named SCLK / DIN / FS / Vc / Vs Are the first 3 connected directly or do I need to twist cable there? Edited September 26, 2017 by Alasdair Moon Quote Link to comment Share on other sites More sharing options...
electrodancer Posted September 26, 2017 Report Share Posted September 26, 2017 do you have the correct HW file on your SD-card ? Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted September 26, 2017 Author Report Share Posted September 26, 2017 I think so ... I edited the MBSEQ_HW.V4 for the WILBA Panel for the STM32F4 where the SRs are set to 3, 4, 5 and 6, cause the wilba only uses 2 SRs for OUT, that part is working, Gates, Clocks and Triggers work with ~4.5 Volts. The thing that is not working is the CV row from the AOUT_NG. The MBSEQ_GC.V4 is on the SD card and I configured the AOUT via the Midibox. Type is set to 3 (AOUT_IF_TLV5630), which should be the right type for the AOUT_NG. Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted September 28, 2017 Author Report Share Posted September 28, 2017 I now have some voltage, but not the 5V on C3 that I expected. I triple-checked the whole connections and solderpoints of the AOUT_NG, all points of the DAC are at the right points, no bridges or something similar. The receivers JAOUT is connected matching to the J1 of the AOUT_NG. Jumper on transmitter is mounted like mentioned in the docs. Quote Link to comment Share on other sites More sharing options...
slo Posted October 7, 2017 Report Share Posted October 7, 2017 I don't know where you are at in testing this problem but I had similar problems that are still unresolved. Check the forum here. My clocks, gates, triggers all work just no CV and I know the Aout works because I built an NG to test it. Check the "testaoutpin" in MIOS, documented in the thread, that is particularly useful. 1 Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 10, 2017 Author Report Share Posted October 10, 2017 (edited) AOUT_NG directly connected to J19 ... no matter what I do, or which channel I select, or try to calibrate ,....... CV channel 1: 0.08 Volt CV channel 2: 6.78 Volt CV channel 3: 2.75 Volt all other channels 0.02 Volt If I measure the voltage directly at the TLV pins ... it also does not change, no matter what I do .... something really is wrong here .... damn .... maybe buy a new PCB and Chip and start over again Edited October 10, 2017 by Alasdair Moon Quote Link to comment Share on other sites More sharing options...
latigid on Posted October 10, 2017 Report Share Posted October 10, 2017 Please post a photo, perhaps also showing the soldering. Quote Link to comment Share on other sites More sharing options...
TK. Posted October 10, 2017 Report Share Posted October 10, 2017 Did you select the right interface (AOUT_NG) with GP16 encoder? If yes: there is a special testmode accessible via MIOS terminal. Just open MIOS Studio and enter "testaoutpin", this gives you some instructions. Best Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 10, 2017 Author Report Share Posted October 10, 2017 (edited) 12 minutes ago, TK. said: Did you select the right interface (AOUT_NG) with GP16 encoder? If yes: there is a special testmode accessible via MIOS terminal. Just open MIOS Studio and enter "testaoutpin", this gives you some instructions. Best Regards, Thorsten. Yes I did, AOUT is selected and was written to the GC.HW4 config file I will test the "testaoutpin" tomorrow and report then. (my Linux Mint does not support the right juice-stuff, so MIOS terminal will crash ) Edited October 10, 2017 by Alasdair Moon Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 10, 2017 Author Report Share Posted October 10, 2017 (edited) 1 minute ago, latigid on said: Please post a photo, perhaps also showing the soldering. I pre-checked every path to ensure those are correct. the TLV does not get hot and has the right voltage at the Vcc and Vdd pins ... same is for the TL074 Edited October 10, 2017 by Alasdair Moon Quote Link to comment Share on other sites More sharing options...
latigid on Posted October 10, 2017 Report Share Posted October 10, 2017 And how are the connections made to the Core? Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 10, 2017 Author Report Share Posted October 10, 2017 Just now, latigid on said: And how are the connections made to the Core? Receiver PCB JAOUT to AOUT_NG J direct 1:1 soldered .... Pin1 and Pin measure correct 5V on J1 I also tested without Printercable and connected J19 of the STM32F4 board directly to J19 of the receiverboard .... JAOUT of receiver_board and J1_AOUT_NG stay connected ( I didn't want to desolder everything to test it with the special-cable you describe in the AOUT-Wiki) Quote Link to comment Share on other sites More sharing options...
latigid on Posted October 10, 2017 Report Share Posted October 10, 2017 Can't see from your photo; did you solder JAOUT_Line Receiver to J2 instead of J1_AOUT_NG? Did you remove the ICs from the Line Receiver when testing with the "direct" Core connections? Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 10, 2017 Author Report Share Posted October 10, 2017 (edited) 16 minutes ago, latigid on said: Can't see from your photo; did you solder JAOUT_Line Receiver to J2 instead of J1_AOUT_NG? Did you remove the ICs from the Line Receiver when testing with the "direct" Core connections? JAOUT is connected to J1 I removed the ICs, but with or without ... same results ... Edited October 10, 2017 by Alasdair Moon Quote Link to comment Share on other sites More sharing options...
slo Posted October 10, 2017 Report Share Posted October 10, 2017 Here's my notes from my last attempt at getting CV to work, in MIOS Studio I found all related signals switched and my Aout_NG PCB was tested separately in a MBNG with a Standard Control Surface and the CV worked. Aout Problem Tested and found all signals good - core J19 through line transmitter & receiver to TLV5630 pins 2/3/4. All switched as expected when using command "testaoutpin" J19 Aout TLV5630 S0 4-S0 2-DIN Tested with si SC 5-SC 3-SCLK Tested with sc RC1 3-CS 4-FS Tested with cs Quote Link to comment Share on other sites More sharing options...
latigid on Posted October 11, 2017 Report Share Posted October 11, 2017 If all connections and power rails are good, then it's possible the chip is defective. I think they're quite easy to kill with ESD/excess heat from soldering. Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 11, 2017 Author Report Share Posted October 11, 2017 I connected the AOUT via the Linedriver to see what happens Results from the testaoutpin via mios terminal J1 of AOUT_NG between Pin 1 and Pin 2 I have 4.8 Volt testaoutpin cs 0 => pin 3 => 0,13 V testaoutpin cs 1 => pin 3 => 3,67 V testaoutpin si 0 => pin 4 => 0,13 V testaoutpin si 1 => pin 4 => 3,66 V testaoutpin sc 0 => pin 5 => 0,13 V testaoutpin sc 1 => pin 5 => 3,64 V so all seems like it should be BUT ... PIN 13 (OUTB) of the TLV5630 gives 2,16V permanently .... so ... solderissue there ... somewhere ... or TLV damaged like latigid_on said ..... so, luckily I have to place another mouser order next days ... wheeeee .... Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 18, 2017 Author Report Share Posted October 18, 2017 O.k., a little update on the AOUT_CV. I desoldered the TLV today, reconnected the board and did some measuring on the SMDpads to see if there are other errors. All OUT's except OUTB and OUTG have -13.78 Volts ???? OUTB and OUTG have 0.13Volts ... J1 Pin5 (SC) has connections to pads 1-2 and 3 of the SMD-field. I know shit can happen and I know my soldering is not always perfect, but if there was no production-fault on my AOUT_NG board (which can alway happen) there is one now ..... So .. restarting at zero ... buying a new AOUT_NG board and all new components .... savest way Quote Link to comment Share on other sites More sharing options...
bemerritt Posted October 18, 2017 Report Share Posted October 18, 2017 Just as another data point, I am still troubleshooting an AOUT_NG. However when I do the testaoutpin, i get 0v and 5 volts, which is what MIOS tells me I should get. That is except on one pin that is not flipping, so thats my next step, to trace that back, but that issue should be on the core board, not the AOUT_NG board. Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 18, 2017 Author Report Share Posted October 18, 2017 Just now, bemerritt said: Just as another data point, I am still troubleshooting an AOUT_NG. However when I do the testaoutpin, i get 0v and 5 volts, which is what MIOS tells me I should get. That is except on one pin that is not flipping, so thats my next step, to trace that back, but that issue should be on the core board, not the AOUT_NG board. Do you use a Linedriver or connect directly to the Core? If you use a Linedriver, try connecting the J19 of the receiver to J19 of the board OR connect directly from the board J19 to J1 of the AOUT_NG (with the special cable) Quote Link to comment Share on other sites More sharing options...
bemerritt Posted October 18, 2017 Report Share Posted October 18, 2017 I did the latter, right to the core with the cable. Actually used jumpers to really make sure i did it right. Quote Link to comment Share on other sites More sharing options...
Alasdair Moon Posted October 19, 2017 Author Report Share Posted October 19, 2017 (edited) @bemerritt .... nice idea to check the board too ... I will do it this weekend (the big fun of debugging ) ... new AOUT_NG Board ordered yesterday, now I still need that nice little TLV .. again .... :D Core schematics of the STM32F4 Core say, that J19 is connected to IC1 ( 74HCT541 legs 15-18) and PB4 of the STM32F4Discovery (which took quit a while to find) http://www.ucapps.de/mbhp/mbhp_core_stm32f4.pdf Edited October 19, 2017 by Alasdair Moon Quote Link to comment Share on other sites More sharing options...
kogz23 Posted March 31, 2018 Report Share Posted March 31, 2018 Hi there, did you get the problen fixed? I am having the same issue with my Seq4 Aout setup. Gstes, triggers, clocks but no CV... Thanks! Quote Link to comment Share on other sites More sharing options...
goyousalukis Posted April 1, 2018 Report Share Posted April 1, 2018 Have you tried using the CV calibration page? When I have an issue, it is usually because I forgot to connect the +/- from my euro rack to the south. Also, a few times when I haven't gotten CV, a reboot fixed it. Probably not your issue, but just in case. Quote Link to comment Share on other sites More sharing options...
kogz23 Posted April 1, 2018 Report Share Posted April 1, 2018 Thanks for the suggestions. Looks like I somehow fried my Stm32 chip, it was getting very hot and not responding to MIOS. Not to bothered as now I can upgrade my Core module! Will report back once back up and running. Quote Link to comment Share on other sites More sharing options...
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