The GMS Board Replication and DB37 in out connector Convert


securesupplies

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #377, on March 4th, 2021, 11:16 AM »
Summary of wiring between Board

32 Pins in sequential  order

1 to 16 is low array marked black ribbon
and 1 to 16 pin array marker whit high end full throttle

the pins from tps are  in order but as they go into the
k11 they twist  for ease of understanding i have numbered  k11 pins  on connector black and white
with the pin number on tps they connect too

and I have labled with those numbers the  place they connect on tps 

securesupplies

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #378, on March 4th, 2021, 11:19 AM »
IF something is  mistaken or connected wrong  let me know
we will endeavor to test all and get it working as video.

once running we will merge the 2 board into 1 board
 and hard wire the traces/ connectors so no mistakes
1 more thing  fixed.
Dan

Earl

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #379, on March 4th, 2021, 12:13 PM »Last edited on March 4th, 2021, 12:19 PM
Dan,

A reminder of the mapping table I posted above shows the order DM74150 pins are read.  You also need to know the mapping from DM 74150 to pins  as it explains the some of the twists you see in wiring.

Ronnie's straight line board in video puzzles me a little.  You can get that output but you need to wire things to merge the two different signals.  If it works the way I think it does inputs from both 16 pin pair of connectors are read at the same time. one pair of pins at a time.  If either is high the signal grows.  When they  both are low it stops for that cycle.   Note: LED input high low may be reversed from actual input to 74LS122.

I explain this in attached document.  Consider document to be a Daft at this point as I have not verified things with testing.  It is based solely on analyzing schematic and using data sheets for chips though I also used Gerber for board.

While the voltage level going up and down could be used to generate the gate it is not used a far as I can tell in K11 circuit.  Also, the output of K11 is a 5V logic level signal.  Which is consist as the 2 primary circuits it feeds accept a  5-volt level digital pulse train and condition the input from K11 to insure it is 5 volt logic level signal before doing any processing on it.

I attached Mapping of DM74LS150 Data pins to Header.  This was done using a voltmeter to located and verify traces between the two.  Board traces are same for each set.    You can see in the lower table that with board traces some of the data points switch sides on the header so wiring order is needs to be changed.  If this is not confusing enough the DM74LS150 are not read in the same order see table above in earlier post, so input to header needs to take that into account.

If I remember correctly the DM74LS150 closest to board edge is A1 in schematic (Labeled Gas Pedal) is read in order E0 thru E15. DM74LS150 to left on board is A2 in schematic (Labeled Distributor) is read alternately one side then other E0, E8, E1, E9...

This all needs to accounted for in the wiring between the 2 boards and explains why wiring is different in two cables.

I also attached my initial analysis of K11 schematic it should be considered a draft as I have not verified everything with testing.

Earl

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #380, on March 4th, 2021, 04:20 PM »
Dan,

Started to Test VIC today.  It comes on initially then in about 5 seconds digital signal turns off.  I still get an analog signal.  It looks like there is a problem with routing of the gate signal. I can see it is wrong looks like we mix up some of the routine to 2 4001 chips.  It will take a like while to figure out.

I think it starts and runs for a few cycles an then stops as Inhibit is not getting triggered.

Looks like 4001 interface for Gate is correct except line going to 2.2k this should not be there yellow line
Red line attached correct interface to 2.2k from 4017B pin 12   (This is driver for green LED)
While I was there I verified other 4001 interface and notice value going to RED LED is wrong should be 2.2K (period in schematic very faint). Item in cyan circle.

I will correct my board and see if this fixes problem.

Earl

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #381, on March 4th, 2021, 06:22 PM »
Ran into another issue with VIC board.  When I used the Analog/ OFF / Batt switch things did not turn OFF.  Now this could be caused by way I hooked up power.  In connected Power to daughter board Battery + and GND then connect both Batt and 12V+ to Daughter board +12.   What I have is 3 separate boards.  I will change hook up tomorrow and test again.   

I did check Gerber and there is no trace between the VIC Battery Pin 8 or C+VDD +12 to daughter board on Pin 7.
Based on the way the switch is wired I believe the Pin 8 should be power in.  And Pin 7 should provide power to daughter board.  Then when power is off so is daughter board.   

I also checked the VIC Matrix board and there is no power into either Pin 7 or Pin 8.  They are on the VIC 37 pin connector on back side but the are not on VIC board active pins.  Note:  GND is hooked up.  If test tomorrow works the way I think it should we will need 2 new traces.

One on VIC board from Pin 7 to Daughter board +12 In (NOTE +12 in is tied to Batt + on daughter board area).

One on VIC Matrix from +12 to Pin 8 of VIC 37 pin Connector (It is already in connector area just not hooked up to Pin 8.  While this could be done on VIC board in long run less confusion to do it on Matric board).  I will post traces after I do test.

 
.

securesupplies

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #382, on March 4th, 2021, 10:43 PM »
k7 has 36 photo sensors  those 36 sensors are 2 x 16  ribbons
black ribbon is the low section  adjust voltage and gate  ( means low throttle positions)
white ribbon is high section further adjusting gate and voltage  ( means high high throttle positions)



securesupplies

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #383, on March 5th, 2021, 12:30 AM »Last edited on March 5th, 2021, 12:33 AM
Re Vic Edits
I see I Will adjust that  Trace for 4001 and resistor

I think it is vital we get you a merge board as many things fixed on it hard to remember all
so we do not to things twice etc

Great work , here we  rewiring the connectors and testing k11 and tps
Dan
Posted: March 5th, 2021, 12:13 AM


Possibly
the Best video made showing the k11  and k7 working

NOTE base of Pedal sensor low is right Black and the top full throttle white  is on left of k7
so as he  activates   far left white t is full throttle max pwm minimum gate time



https://youtu.be/dHbLp9SA2Bs

Earl

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #384, on March 5th, 2021, 02:28 PM »
The attached pictures show traces to fix power issue I encountered.  Board did not turn off when I had both Batt input and on Pin 8 of the VIC and Pin  7 the +12 to daughter board connected at the same time.  This is caused by the way the Anal/OFF/Batt switch is wired.

Fix was easy  (see attached)
Input +12-volts on VIC Pin 8 (battery)
Use VIC Pin 7 C+ VDD +12 to provide power to Daughter board area
Add trace to VIC Matrix from +12 in 37 pin connector to Pin 8  ( this provides the Batt input to VIC)

With these changes the switch works as it should verified with testing.  This also removes power from daughter board area when switch is in off position and provides fuse protection.  Note:  BATT label really means +12 regulated power.

Did some more testing (found I was missing a trace connecting couple of pins 12 and 13 in 4001 in Gerber not on my board) I fixed that and other items above.  Still have problem with 4046 not putting out signal on pin 3 so no digital signal on digital side.
This also stopped Gate from reaching Pin 5.  I patched a signal from Pin 4 in to 4001 Pin 8 and verified gate signal does get to pin 5 so that path and 4001 and gate input are now all correct).  No changes to board need yet.

There are several things that need to be correctly configured to for 4046 to work properly so it will take a like while to check everything.  I will work through all 5 of the circuits that are on this board and verify everything is working.  I can use my test to cross check things as they are pretty close to being identical just easier to get at things in my test system.

I did notice it appears I have have a +12-volt offset to analog signal I need to trace down.

Earl








securesupplies

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #386, on March 5th, 2021, 11:01 PM »
Important Note from previous discussion re video
The Following Explains how the initial k11 interconnect work on the vic matrix
Can you tell a bit more on what point (M, M1, J, A) connections
in the circuits the yellow and
blue (duty-cycle) scope traces are measured showing in your video?

I think I know, but I'm not sure...
yellow is (to primary coil TX1) and blue (M, M1)?

Sure,

They is one (J) output from the analog voltage generator that is connected to the digital control means card.
That is the signal that you see going up and down.

 They are several outputs of the J signals that comes out the Digital control Means board.

J Connections

If you look at Stan's actual Digital control means card you will see it has i think 4 or 5 (J) outputs on it, that goes out to different circuits.

One (J) goes to the voltage amplitude for the primary.
Some of the J outputs goes to other cards.

The (M) on the digital control means card is the signal that is fed into the analog voltage generator which produces the J signal.
(M1 through M4) goes to the injector cards which is the signal that you see going back and forth which controls the injection (on) time and other things.

​the yelow scope signal comes from the analog voltage generator which is tided to digital control means,meaning build everything just for a simple offset.

Anyway I managed to ''foul''the J input by building a voltage divider coming in the J input,

Without that the ''gain pot'' is locked. Dont know why but the offset pot is adjusting the voltage from 2v to 11.45v,and the gain pot is adjusting the same voltage but in a short range of 2v.How  your circuit works ?

which pot does what?

Important Note
The Following Explains how the inital interconnect work on the vic matrix

 

Can you tell a bit more on what point (M, M1, J, A) connnections

in the circuits the yellow and

 

blue (duty-cycle) scope traces are measured showing in your video?

I think I know, but I'm not sure...

 

yellow is (to primary coil TX1) and blue (M, M1)?



Sure,

They is one (J) output from the analog voltage generator that is connected to the digital control means card.

 

That is the signal that you see going up and down.

 

They are several outputs of the J signals that comes out the Digital control Means board.



J Connections

If you look at Stan's actual Digital control means card you will see it has i think 4 or 5 (J) outputs on it, that goes out to different circuits.

One (J) goes to the voltage amplitude for the primary.

Some of the J outputs goes to other cards.

 

The (M) on the digital control means card is the signal that is fed into the analog voltage generator which produces the J signal.

 

(M1 through M4) goes to the injector cards which is the signal that you see going back and forth which controls the injection (on) time and other things.



the yelow scope signal comes from the analog voltage generator which is tided to digital control means,meaning build everithing just for a simple offset.Anyway I managed to ''foul''the J input by buildind a voltage devider coming in the J input,Without that the ''gain pot'' is locked.Dont know why but the offset pot is adjusting the voltage from 2v to 11.45v,and the gain pot is adjusting the same voltage but in a short range of 2v.How  your circuit works ?

which pot does what?



The digital control means board has nothing to do with (J) it only has 5 additional outputs on it from the analog generator board. The analog board sets on top of the digital board. In other words one J output from the analog board, and that one output is fed to 5 pins on the digital board as outputs. Like the photo below.






Earl

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #389, on March 9th, 2021, 07:26 AM »
Dan,

Update on VIC board testing.  Had a few issues with way I wired Pots expected I would need to double check them after board was working – Had another bad solder joint on resistor that was a pain to find messed up OFFSET pot and caused analog voltage offset to be +12. Still looks like I need to do something about amplitude of Analog signal.  Getting all the way through but not driving coils.

Fixed problem with no signal on 4046 pin 3.  Turns out 4046 pin 3 and 4 need to be connected for it to work.  This was done by 4 position switch in original schematic and hard-wired connection on later boards switch no longer used.  Trace below fixes this. Adding this trace connects them. It also provide provides input to 4001 gate path needed for gate to get to inhibit pin which turns on output on pin 3.

Have check all the front panel controls they work once I wire pots correctly.

Found a couple of label issues board work.

Manual / Auto Switch - There is no off-position F stands for Frequency.  See picture below

In the board connect area Pin 7 C+ VDD should be C+ VCC    VDD is never +12 it is always +5. See picture below.

Can not check Feedback part of board until I resolve the analog level issue path seems to be there but no signal from feedback coils only voltage offset..  I may need to just adjust the gain settings on analog signal.   I had to removed the capacitor on gain feedback loop in my test system to increase level and documented why in my test notes for the K9.

Earl


Earl

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #391, on March 9th, 2021, 04:38 PM »Last edited on March 9th, 2021, 04:44 PM
Dan

I made a couple of changes below to increase the amplitude of analog signal going to coils and fixed solder problem and now have a working board!!!

GSFB input Issue

I was checking through the Analog K9 input and notice that I has a volt level signal I did not expect.  I then checked the 741 on the GSFB input and found there was a 5-volt level on both pins 2 and 6.  Figured out this is because there is no input and the 5v comes from the pull up resistors.  Problem is output on pin 6 is past to second stage of K9 and the normal input gets lost as its level in in 200-300mv range. 

I did find 2 different ways of fixing this.

1)   Remove this 741 from the bottom socket board in K9 section – Tested as I have chip installed in a socket.  Offset voltage is not passed through.
2)   Connect a jumper from [J] input to GSFB input.  Tested as well.  Worked because now the level is the same on both lines.  Now they are at same level when they merger.  I believe intent is to be able to provide the same signal at a higher voltage offset on GSFB input that would then pass through to coils.

With either of these changes I can now track signal further though the K9 circuit.

NOTE:  Neither require a board change just in operation note as this is a future enhancement.

Last change.

I change .47uF to 47nF on gain side of K9 Voltage Amplitude Control.
 
.47uF gave me almost not signal.  See Picture VIC K9 capacitor to big

I then tried it with no capacitor and got a triangle wave with good signal See picture VIC K9 no capacitor

47nF works best see picture VIC K9 with 47nF

The Picture VIC K9 Gain Fix shows what I changed

After this fix I still did not have feedback working and signal did not look right.  Checked through K4 Cell Driver and found a bad solder joint on Q8 that fixed feedback and signal now looks correct See picture

CH1 is the from the VIC front panel test point
CH2 is across capacitor on cell interface using differential probe.   Both now match my test system.
 
Note I have not spent any time yet doing any addition all testing.




securesupplies

Re: The GMS Board Replication and DB37 in out connector Convert
« Reply #395, on March 15th, 2021, 05:47 AM »
I am Adapting and updating the sequential vic trigger to the db 37 changes we made
to matrix and Vic merged board.

will fed to 12 vic and trigger 12 power switches
with a tps  splice from k11 tps ,

Dan