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Hi all Decided to build a megajolt unit for the tiger to do away with the worn distributer systen.
Last night i had all the parts to build the board, so i did.
All going well till trying to connect it to the laptop. It just wont communicate. I have also tried my PC this morning to no avail.
Looking at the Megajolt web site it appears this is a very common problem but not being very helpfull in sorting it.
Wondering if their is anybody round the preston area who has the Megajolt working and communicating that might be able to help.
Thanks for looking, Ben
did you have 12v to the unit??.
which version of the software are you using?, java or non java??.
Ray
Yes i've got the unit powered up, and i have tried to use both programms from the megajolt site and also hyper terminal to communicate with
it.
do you know for sure which terminals need to be connected in the serial lead, is it just 2+3?????
Gonna do my nut in soon.
you need pins 1,2,3,5 and 9 connected straight through i.e 1 - 1, 2-2 etc.
Ray
Are those pins deffo right as their are so many defferent posts on the site and nothing for sure.
I appreciate your help very much.
No idea about MS, but at the very least you'll need 2,3,5 for RS232c (TX,RX,Sig Gnd)
quote:
Originally posted by minto4
Are those pins deffo right as their are so many defferent posts on the site and nothing for sure.
I appreciate your help very much.
My bad sorry.
This is the board i built could you check to see if it all looks good and i have the right parts for the communication.
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I may be missing something, but it doesn't appear that you've soldered a load of the connections.
Top left cap.
Cap under the max232.
Few max232 pins.
TPS caps.
Top right diode.
I've never seen an MS board in the flesh, perhaps they can be soldered on the reverse?
If you've made the serial cable up as rayward said and still not getting anywhere, double check all component positionings and see if you've
got any dry joints.
Failing that get yourself http://www.sysinternals.com/utilities/portmon.html and log your com1 (or whatever your connecting it to). Turn on the hex
log too, it'll show you exactly what is going on and where in the process its stopping and also give some details of how its trying to
"talk", handshake etc.
just tried the port monitor and this is what i got, just to add its the same when i unplug the jegajolt.
also checked all the joints twice and all good as far as i can see, the components are soldered from the other side what you can see are ones that
have not flowed all the way through but do have a good connection
Well its getting nothing back from the MS.
I was suprised when rayward said 2-2 and 3-3, I'd expect 2-3 and 3-2.
Have you got all the connections he said currently wired up?
If so, try putting 2 to 3 and 3 to 2.
Your PSU is definately working OK?
I have a regulated 12v psu running the unit while testing, checked all the voltages while building all good 5v + 12v
Just noticed its a 9way not a 25way so 2-2 and 3-3 is plausable. Although depends how its designed.
I don't suppose you feel like tracing back pins 2 and 3 to the max232 and seeing which pin they go to?
I think we'll have to presume ray was right.
Your serial port testable on anything else to prove its OK?
Reading the MJ forums.... Can you do this test?
The problem was a faulty oscillator (QG1)- the diagnosis is that pin 10 of U1 (the main processor) should have a 16Mhz square wave on it.
If you don't have an oscilloscope to hand to check, you can measure the voltage with a multimeter - should be 2.4 volts or so.
My faulty one had no square wave and 0 volts when measured at pin 10 of U1.
Replaced the oscillator (it was brand new anyway) with another and instant success.
[Edited on 12/8/06 by the_fbi]
Just finished using my laptop with cable on the Avon at a rolling road session at Bogg Bros, could check when i get home excatly what the pinouts for
the cable should be if it would help? Also are you using a normal comm port or a usb adapter? i am using a USB adapter and have no problems but some
people seem to have issues with them, i think its down to there being a couple of types, mine is based on the prolific chipset and works fine.
Mac
also just rechecked the photo you posted and at least one of the dry joints appears to be on a track on the surface of the board not underneath, maybe
im being anal but i would want to see solder both sides on every joint.
JMO!!
Mac
first thing to do is check the port and cable are working, the pins 1,2,3,5 and 9 are definately correct so....
at the MJ end of your cable link pins 2 and 3.
run hyperterminal on your pc, set the com port settings to the port your using(com1 i guess??).
with local echo turned of, if the cable and port is working, you should get every character you type bounced down the cable, across the pin2-3 link
and black to your screen,(with local echo turned on you should get everything twice).
this will confirm the cable and port are fine.
Ray
quote:
Originally posted by the_fbi
Reading the MJ forums.... Can you do this test?
The problem was a faulty oscillator (QG1)- the diagnosis is that pin 10 of U1 (the main processor) should have a 16Mhz square wave on it.
If you don't have an oscilloscope to hand to check, you can measure the voltage with a multimeter - should be 2.4 volts or so.
My faulty one had no square wave and 0 volts when measured at pin 10 of U1.
Replaced the oscillator (it was brand new anyway) with another and instant success.
[Edited on 12/8/06 by the_fbi]
if you've got 5v on the correct pins on the max232, and still not working, i would replace the max232, failing that, possibly a faulty
processor.
whereabouts are you?, if your anywhere near, you welcome to plug your MJ into my laptop just to check, or failing that you could post it to me.
Ray
[Edited on 12/8/06 by rayward]
if i posted it to you could you give it a checking over and se whats what. i take it you would have the parts to sort any possible problems???
your not going to the kit car show tomorrow in harrogate are you???????
on that note i dont suppose anyone who hase a working laptop and megajolt is attending the car show tomorrow are they?????
i can check it out/repair it for you if you want no probs.
i might be going tomorrow, if you let me have your mobile number, i'll give you a ring if i;m there.
Ray
Just to check, you do definately have a programmed micro don't you?
quote:
Originally posted by viatron
also just rechecked the photo you posted and at least one of the dry joints appears to be on a track on the surface of the board not underneath, maybe im being anal but i would want to see solder both sides on every joint.
JMO!!
Mac
to prevent the power plane sinking all the heat away from the
board. My number is 07843 622154
i am going at 9am from preston
should be their from about 1030 all being well.
Cheers Guys.
Ben
Its also worth making sure that you dont have any software running on your PC that is using com port 1.
Serial cable needs pins 2 3 5 and 9 connected straight through.The original megajolt tuner software can be difficult to set up using Java , but the
later windows based version should work easily.
For the soldering I use .5 mm solder and a small tip on the soldering iron , it is then easy to get a good joint without putting in to much
heat,although the ground plane joints can be harder to solder for the reasons mentioned.
Paul.
which wingows software are you refering too????
Am i right in thinking that i should still be able to talk to the MJ without java installed using hyperterminal and such.
Also is the offer from Ray still open to me senging you the unit to get sorted???
I'm eager to get started on the install of it and get tuning, and get rid of the old dizzy.
Doed anyone know of a company that makes a blanking plug for the dizzy hole, or is it a case of getting one turned myself.
Cheers all.
Ben
The windows based version is megajolt lite jr tuner 02.2.1260 .You will find it on the megajolt website posted by 4600.Get the latest version the
earlier ones didnt work correctly.
You should be able to get some communication with the megajolt from hyperterminal, have you checked the cable by linking pins 2 and 5 if it is working
you should mirror on the screen anything you type into hyperterminal.
Your engine is a pinto and the oil pump is driven from the dizzy on these ,to remove it you would need to fit a shortened one to provide the pump
drive.
Paul
quote:
Originally posted by minto4
which wingows software are you refering too????
Am i right in thinking that i should still be able to talk to the MJ without java installed using hyperterminal and such.
Also is the offer from Ray still open to me senging you the unit to get sorted???
I'm eager to get started on the install of it and get tuning, and get rid of the old dizzy.
Doed anyone know of a company that makes a blanking plug for the dizzy hole, or is it a case of getting one turned myself.
Cheers all.
Ben
quote:
Originally posted by paulf
You should be able to get some communication with the megajolt from hyperterminal, have you checked the cable by linking pins 2 and 5 if it is working you should mirror on the screen anything you type into hyperterminal.
offers still open if you want to send it, have u2u'd you.
Ray