Another JTag Q

[petedog]

You have to Ground Pad #1 on a 2700. That will Disable the IRD ReBoot! You can get Box Keys without grounding, but you must Ground to Read and Write TSOP!
Hope that Helps!

[petedog]

I can not tell you larry, maybe someone else can! Just don't wave no white flag!

[Cimba]

I have a 2700 Dish IRD & a quad mode jtag. Jkeys alway says unknown device. I've read a lot & tried everything. I always try it in order, jtag, plug up, then jkeys. Iv'e tried to move it back & forth. I shaved the jtag openning an 1/8 inch. Still nothing. What can i try?

larry :repuke:

I can't say anything other than my own experience, I run a 3700 and have Mili's j-tag. When I got the tag I followed the instructions and pictures from the site to the letter but could not get a reading. In desperation I completely reversed the pictured pin alignment while running the ground pin to the IRD chassis and Bingo!
So either the pins in the the tag were reversed or the pads in the IRD ?? I don't know if you can harm the IRD but it did not hurt mine by trying the pin alignment both ways, it's up to you if you want to try it.
I am not reading the instructions wrong either, I had a friend check it and what I've said held true.

[Cimba]

the pins n my jtag fell out so i put them back n where ever because they look the same. could that b the prob? if so, how do i know where they go? thanks

larry

Where did you get it ? If it is mili's the how to for j-tags shows the leads designations. Any provider should have the same info on site.

[Cimba]

Since different j-tags are set up with varying cable assignments you need to know that pattern for yours. ie: which wires are trst, tdo, tdi, tck, tms, and ground. Hopefully your tag came with a picture of those assignments or the site has one. Once you figure that out then you can easily attach the wires to the right pads on your IRD.

[Cimba]

When I say Wires I mean the grey ribbon cable, but I am unfamiliar with your tag. There should be a set of pins that connect to the IRD pads that I listed above, trace those back to the board along the grey ribbon and you might find the pin assignments labelled on the board. I don't know about the extension. The instructions for your tag are meaningless to me as I can't see the unit clearly and they don't label the leads like I listed above. Sorry I can't be of better assistance.

[JCK7]

how? i have a 2800 that does the same. i have a 25 pin male to female extention but it says unknown device. i can't even get my box keys. any ideas?

larry

FILE did set preferences printer port then to LPT port 0X378 , first time use default is set com 1

I have 98 upgrade to xp pro it reads every time , XP home add it new don't work with j-tag . but work jeeper software

cant tell what you switch on it replaced shunt that move on pins from read to write so check switch setting

[Meddle771]

Larry..I had bought a buffered Quad Mode J tag . The Pogo pins on the magnet part of the device never made good enough contact for me to Jtag my 3700 from the IRD cut out . I used a Ohm meter to locate which pads went where on the top of the board soldered a header and wire wrapped a female plug that excepted the grey 10 pin plug and Jtagged from there...Had no problems . Can send pics of it if you like...

[nosty]

depending on how new your motherboard is you may want to go into the BIOS and disable the two-way communication on the LPT port and try it again. I don't know if this applies in this instance but I have had some problems with some flash programs if two way communication is enabled on the port. also if you are running XP try going go to your device manager click on ports then click on LPT1 on the port settings enable the Legacy PNP and try using different interrupt settings try to use the top one first then try the third one. I haven't applied this to anything for Fr**tv But it has worked for other things for me in the past.

[momlowry]

Larry..I had bought a buffered Quad Mode J tag . The Pogo pins on the magnet part of the device never made good enough contact for me to Jtag my 3700 from the IRD cut out . I used a Ohm meter to locate which pads went where on the top of the board soldered a header and wire wrapped a female plug that excepted the grey 10 pin plug and Jtagged from there...Had no problems . Can send pics of it if you like...

Can you send me pictures of this? I have a quad that I am ready to toss out the window and have no idea how to build one but I need one. If you could show me how to rip this thing apart so I can tag my 2700's I would appreciated it!

Thank you!

[indal_98]

my atmega does not work. any ideas?

Yes...it doesn't work.....!!!

And it will remain so ....unless you give us some information to help you....

[indal_98]

read it :asshole2:

larry :flipa:

Read what ...you asshole..

The threat started out as a JTAG problem....

Here you said your Atmega worked...


my bios is set 2 epp. my atmega worked so it is not the port. I have the right cable & i do everything n order. any ideas?

Here you said it doesn't.


my atmega does not work. any ideas?


Are you too stupid to realize that if you need help you should provide some information about your Atmega?

Can't program it....black screen...error 005 or error 019...what ?

[bcub]

I've just arrived here because I'm having problems with my Quad also. So far I had discovered that 2 of the pogo's got stuck when they were compressed. Straightened them and put some WD40 in them. Then I found that one of the pogos was recessed too deep thus not making contact on the quad pad. Wrapped a piece of 20gua wire just below it's head before re-inserting it to make it stick out enough to make contact.
Next I build up the quad pads with solder to provide better contact for the pogos.
Still nothing.
Oh, and the magnets are not strong enough to hold it into place.

So now I traced all of the pogos to the parallel plug and I find that TDO and TRST are reversed to what I've used previously with my home made, unbuffered, soldered into position, Jtag ....which works great.

Summing up, there appears to be a number of issues with the Quad Jtag.
The best way still is to install some kind of a port on the IRD to connect the Jtag pads with the PC. I use a simple Serial port for that purpose and a short adaptor cable to bridge into the IEEE printer extension cable. And forget about the buffered part, it's not needed.

[bcub]

.............So now I traced all of the pogos to the parallel plug and I find that TDO and TRST are reversed to what I've used previously with my home made, unbuffered, soldered into position, Jtag ....which works great.

Summing up, there appears to be a number of issues with the Quad Jtag.

I now switched TDO and TRST inside the buffer-parrallel plug and the Quad J-tag is now working with Jkeys.

[Rednecks]

howdy yaawwwl
i'm a newbie at dish and have learned much about dtv and dish through these forums.. never thought i would see the day where i might be able to offer help but yawl finally ventured into familliar ground. you have answered your own question and didn't realize it. I was a network administrator and the designated printer guy for 7yrs.. why is this significant?? because i learned a hell of alot about parallel ports and settings :) your atmega works fine (it's a dumb device.. output only.. only need oneway communication) you said your printer port is set for epp (one way communication parallel port) your jtag does not work (the jtag is talking to the reciever and trying to get it to talk back) requires 2way communication.. ecp printer port. check both you system bios and windows settings.. make sure they are set to ecp parallel port

good luck all.

[bcub]

thanks yall. any guides about tdo & trst?

I wish I could attach a picture, but here is how it worked out on mine:
The parrallel connector from your buffered quad j-tag has a small circuit board inside it. The ribbon cable from the j-tag is soldered to this board. When you look at the 6 soldered incoming wires, TDO and TRST are the last two wires on the right (5 and 6). They are the wires that I de-soldered, switched, and re-soldered.
Since mine were originally wrong and no damage was done when I powered up that way, it would stand to reason that you can try this without doing damage.
Quality control appears to be non existent on these tags and therefore it's entirely possible that other wires are wrong on yours or none at all.
In the Jtag documentation here at Mili's you'll find a layout of the Jtag pads in the IRD. From that you can trace the corresponding Pogos to the parrallel connector. The Connector has 25 pins and when you look carefully you'll find that they're numbered. What you want is:
TMS on pin 2
TCK on pin 3
TDI on pin 4
TRST on pin 5, and
TDO on pin 13.

[Rednecks]

hi guys,
need a little help here.. was trying to clean the jtag pads on a 3700 that was covered in dust and one of the required pads for "tagging" from the bottom fell off.. used cotton swab and very little pressure and the dang thing fell off!! anyway... gotta go top side now.
Does anybody know the top side ird jtag pads needed for tagging a echostar 3700??
I need to know what # pads to use and what pad is what.. ie.. tms, tdi, tdo, tck, trst
any help would be greatly appreciated (are all 3700's this crappy??)
I would try the ohm meter thing as mentioned above but again.. one of the pads fell off... no pad to put ohm meter on.

thanks

[The Punisher!]

Same as 27**....Look it up.

[justplayin]

Hey guys, saw this thread...and thought this may be an appropriate place to post...didnt want to start a whole new thread.

First off let me say that Chupy's Jtag guide is awesome...great detail, well put together...easy to follow..and because of this I have 3 working JTAGs.

So why am I posting ? I want to know a little more about the buffer chip and its need for external power.

The reason I am asking is that I really only use the JTAG on IRD models 3900 and 4700. I have soldered in DB9 pig tails that i nterface witht he JTAGs for easy ECM fixes. I also added a LED to the JTAG board for shits and giggles.

What I found interesting is that the JTAG will work in any power setting - 3.3v 5v or in the OFF position and the LED will light whenever Jkeys is funtioning.

So is it really necessary to have a cumbersome batterr pack added to the Jtag is I only intend to use it with these receivers ?

Is the buffer chip getting enough power from the IRD and Parallel port to protect the hardware from surges.

Thanks.

[scottymac]

I have a 2700 Dish IRD & a quad mode jtag. Jkeys alway says unknown device. I've read a lot & tried everything. I always try it in order, jtag, plug up, then jkeys. Iv'e tried to move it back & forth. I shaved the jtag openning an 1/8 inch. Still nothing. What can i try?

larry :repuke:

Had the same problem until I did 2 things.

#1 check the parallel port in Bios. Make sure it's set to ECP.

#2 I have to press VERY VERY FRIGGEN HARD on the JTAG to get it to be recognized. I mean really really hard on the circuit board opposite the wire harness, hard like you think you're going to break it.

This is the only way my 2700 will regognize the Quad Mode JTAG.

[mark jordan]

i was getting my box keys they came up right away then i was side tracked and let every thing running now my ird wont start up is there any hope still

[mongoose123]

damn this stupid quad mode jtag just isnt working for me

i double checked my bios and it is set right

i did everything right
i even tried a second jtag i bought a e jtag and it doesnt work