Jtag repair Dreambox

**kapedani** · 28th August, 2011, 12:19 AM

1-How to Repair Dead DM500S With JTAG (1)

1. Hardware Connection
LPT--------------------------DM500
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 (GND)

2. Connect the LPT MALE port to your PC, and then power on the DM500S.

3. In the ?Start? - ?Run? menu, execute ?cmd?.

4. Execute ?Jtag.exe -m dm500 -e 00:09:34:XX:XX:XX? (XX should either be numbers 0-9 or letters a-f), then the bootloader of DM500S will be downloaded into the FLASH memory.

5. Several minutes later, the bootloader will be written into the FLASH memory successfully.

6. Power off the DM500S, and remove the LPT MALE port from your PC. Then you can transfer an image to DM500S with DreamUp.

***9679; For more usages of JtagDm500.exe, please execute ?JtagDm500.exe -h?.

***9679; You can change the MAC address of your working DM500S with JTAG and JtagDm500.exe.

**dungatron** · 29th August, 2011, 08:17 PM

thanks m8e i get one made up this week and give it a blast
ps thanks

**ade786** · 31st August, 2011, 06:00 PM

hey guys i need to jtag my dreambox need some questions answering..
1) which wire(cable) is needed to connect the dreambox to my pc? does it have to be male to male or female to male?
2) does my dreambox need a jtag if no lights are on the front but i can hear the dreambox humming???

thhanks in advance

**satteknik** · 5th September, 2011, 12:41 AM

cant not boot

**drozen** · 21st September, 2011, 12:05 AM

Thank you to everyone , but I wanted to ask the computer to the rs232 cable to the JTAG port to the output of know a little bit unreasonable

**themist8** · 28th October, 2011, 02:23 PM

Hello Friends,
I would like if someone could help me to tell me to do because the jtag ends after three days and the machine does nothing nor dreamup related or something else I tried to connect to the dreamflash but nothing.
Thanks in advance.

C:\Documents and Settings\Themist8\Desktop\Jtagdm500AIO>jtagdm500 -m dm500 -e 00
:09:34:01:A4:3F
Dreambox Dm500 board initialize
Flash info. : INTEL Unknown
[dm500] reading CA:ca 00 01 06 20 21 46 00 09 34 20 21 78 06 04 ff
[CA] 6th mac addr byte is not redunderant, fixing it
Readed Config Area
Configuration Area
Mac Address: 00:09:34:20:21:46
Redunderant Mac Address: 20:21:46
Tuner Type alps
Mac Address Change Requested

Commit Config Area
Configuration Area
Mac Address: 00:09:34:01:a4:3f
Redunderant Mac Address: 01:a4:3f
Tuner Type alps
Erase Flash done

**varimas** · 12th November, 2011, 08:15 PM

Nice work!
Thanks for Author. Maybe some guys try to connect to DreamBox with universal like a H-JTAG program? If it possible?
Thanks.

**monther** · 19th November, 2011, 01:34 PM

thanks i will try

**daytonip** · 22nd November, 2011, 09:49 PM

thanx fot the quide

**pax** · 16th December, 2011, 08:23 PM

Thanks ;-)

**pax** · 16th December, 2011, 09:49 PM

My dreambox 500s the green led is flashing very fast and doesn't bootup anymore. When i view it in console mode with serial cable and powerup de dreambox it produce one and the same character on screen over and over again very fast.

I think i have to reflash the bootloader but made a jtag cable the version with 5 resistors of 100ohm 0.5watt and measured the resistors but they are not exactly 100ohm all some are 98 ohm. I made this cable as short as possible and tried to flash it with the dos program posted here but without success.

Nou i try make the jtag with a 74LC245 ic but i am wondering where to connect the "Vcc 20" - Vcc 3.3V ?