Jtag repair Dreambox

**Fergal** · 7th April, 2009, 08:44 AM

Originally Posted by costas1969

Nice documentation but did actually somebody tried it and manage to wake up a bombed clone box??What i always read is reports how to do it but no one to say that it succed.

Hmmm did not even bother to read the thread did you
post 22,24,37,51 and 64 all stated they used this and it worked as it did for myself aswell.

**tenorism** · 8th April, 2009, 04:51 PM

My dreambox is alive again

**rootshadow** · 9th April, 2009, 11:59 AM

let's see i will try to repait my dm500 today
i think its not so hard

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have try... works... but.. i can't to Up this now... will try more
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Nothing happend... Green light is ok. but DreamUP does not recognize the box.. can anyone can help me?

**samochod3** · 9th April, 2009, 01:22 PM

thanks, it works

**rootshadow** · 9th April, 2009, 09:47 PM

again, i repair DM via JTAG, green light is ok. but Dream UP does not work!
Can anyone help me?

**medy20** · 3rd May, 2009, 12:12 AM

Originally Posted by alunfennell

The connections are:

Picture 1 referance....

LPT--------------> Dreambox/Clone

2 --> 100 ohms --> 11 ( Halt)

3 --> 100 ohms --> 9 ( Tms )

4 --> 100 ohms --> 7 ( Tck )

5 --> 100 ohms --> 3 ( Tdi )

11 --> 100 ohms --> 1 ( Tdo )

25 ------------------ 16 ( Ground)

Picture 2 referance.........

Th pins 18, 19, 20, 21, 22, 23, 24 e 25 of the port LPT must be shunted between themselves, like commercial jtags has.

Now, The cience of the thing is doing the connect and turn on the box at the same time.

With the tests done I've understood better how it works great:

The secret is in 1? do connect to the program and then turn on the clone, but with a certain delay. This delay depends on the speed of your CPU, the faster CPU's, minor the time/delay (between 0 e 1 seconds).

Change the priority of the program jtag_windows.exe on the task manager for the real time which must turn more real the delay itself, once the program will give maximum priority of the use of the CPU.

About the timming, if it shows you only "ERROR:register test failded" then the jtag is ok, but you have turned on the box sooner then expected, if it shows you the 4 times "ERROR: communication with LPT/JTAG", then you must turn on the box sooner, or the jtag isn't ok.

Remmember that you must connect the box always after making connect on the program.

After you must warp/straight the pins on the adaptor switch of the box, so it fits faster on the electric switch.

By end, you must use an electric switch easy to fit, I have used one triple (from the bad ones), but I had to dismount it and press their electric pins to don't make bad contact.

When doing "write" the program sends immediately the boot, that is the file "blimg".

The file present in this attachment is the boot of a DM500 and tunner ALPS of CRC-32 9055B110, once again thanks Matrix10, because I've tested a boot that were supposed to be for the DM500 and ALPS and it didn't worked, and this one in the attachment is guaranteed it works.

after sending the boot of 128KB by Jtag, you can turn on the box with dreamup and by rs232 send an image

i think that it's my last chance to revive this box

let's go

**krisbanagan** · 9th May, 2009, 03:55 PM

hi!!!guys regarding jtag procedure i saw the pic ang aesy way,but my problem where i connect this db pin 25..how the
easy way i don;t know where i can proceed this pin 25 suppose to conected where place..plsss can u provide me
exact drawing fisrt base to ending prodedure..coz my dm 500s needs also jtag..green light only but if to conected
dream up not act taken..pls tia...

kris/ksa

**octron2008** · 11th May, 2009, 09:55 AM

Hi all

I think I'm clear on how to do the Jtag but my problem is how do I build the cable to connect from the PC to the DM500s.

I can see in the pictures I need the "DB25 male connector" from the I get the cables to connect the DM500s to the 16 pins.

My questions is where do I get the "DB25 male connector" from, can I just get a printer cable and break it to make or do they sell loose connectors?

Same with the cables that connect from the adapter to the DM500s, looking at a previous post they are called "r100 0hm" but searched in a couple of website and could not find them, what is the exact name for them?

Does anyone know if in the UK places Maplin they sell them? if I go to the shop can I just buy they with that name or do they have another name.

If anyone have any links to buy in UK and/or Ireland please PM me the links or if anyone has a spare build I could buy from you.

thanks for all your help.

**italia198311** · 11th May, 2009, 07:17 PM

it disn't work help

**digital-kaos** · 15th May, 2009, 04:33 PM

Originally Posted by alunfennell

By all means the Eagle Linux and Blackbox 500s are a good buy of course do not load Gemini software onto them, but for these two receivers the support is the same as it is for the Dreambox 500 series.

Whats wrong with the Gemini image. Ive loaded it onto my blackbox and works great!