R-jtag no debug LED Jasper 16mb

P

Psychomaniac

Full Member
Jan 20, 2010
34
0
South Africa
Console Type: (Jasper)
NAND size: 16
Dashboard version: 2.0.15574
CB version: 6754
Screenshot of NAND details from J-Runner:
Capture.PNG
J-Runner log:
View attachment Log.txt

Image of R-JTAG board:
IMG_1561.JPG
Images of close-up soldering to motherboard:

IMG_1559.JPG IMG_1560.JPG IMG_1563.JPG IMG_1562.JPG

Description of problem:
No debug LED on R-Jtag

Was the console working before you started: Y

Howzit all. So as you can see above, i have a problem :D. This is my first R-jtag, and have immediately run into an issue, so any assistance will be greatly appreciated.
I have read nand, compared, created ecc, written ecc. No problems there. After installation of the R-jtag chip however, i dont get a debug led when powering on, to get xell.
I have searched a few posts, but havent found anything regarding no debug on R-jtag.
Also, this is not a faulty console, somebody had attempted R-jtag by the looks of things, cos R8C2 resistor is gone, and trace has been repaired. Tested continuity and all is ok.
Stock nand boots.
Praying its just something simple and stupid im missing, and apologizing beforehand if it is :)
Thanks
PS: If better/more pics are needed, pls shout
 
BrockThunderjam

BrockThunderjam

VIP Member
Jun 25, 2013
1,503
88
Did you try the bottom side cpu_rst shown in the tut?


Sent from my iPhone using Tapatalk - now Free
 
Martin C

Martin C

VIP Member
Jan 10, 2004
35,981
0
Scotland, UK
www.team-xecuter.com
Have you already checked all 8 POST_OUT pads for good resistance?

Remove the ribbon cable and check each pad against GND. Set you MM limit to 200k. obviously no PSU should be needed here.

- - - Updated - - -

BrockThunderjam said:
Did you try the bottom side cpu_rst shown in the tut?


Sent from my iPhone using Tapatalk - now Free
Click to expand...
It's not CPU_RST related. debug light on R-JTAG is driven from POST_OUT.
 
Martin C

Martin C

VIP Member
Jan 10, 2004
35,981
0
Scotland, UK
www.team-xecuter.com
I'm led to believe it should work on 3.3v anyway.

If there's still nothing after it's moved to 5v, please check the POST_OUT resistance.
 
nofeloniesyet

nofeloniesyet

VIP Member
Jan 16, 2011
4,830
128
Nowhere
Martin C said:
I'm led to believe it should work on 3.3v anyway.

If there's still nothing after it's moved to 5v, please check the POST_OUT resistance.
Click to expand...
i know a cr3 pro wont dbg if on 3.3 volt,rjtag is not much diff no?
 
Martin C

Martin C

VIP Member
Jan 10, 2004
35,981
0
Scotland, UK
www.team-xecuter.com
P

Psychomaniac

Full Member
Jan 20, 2010
34
0
South Africa
@ CHUCKEMZ

Awesome Catch. Looks like that was it.

@ Martin C


Post_Out resistances vary from 144k to 154k ohms

Now to get it to glitch. No Xell after 10 pulses. Will mess around a bit. Board not brilliant, getting rrod now and then, need to fix it into the cage to get rid off rrod :(
 
P

Psychomaniac

Full Member
Jan 20, 2010
34
0
South Africa
Don't have jr-programmer yet.
Also, quick Q. I selected jtag / rjtag in jrunner. I'm guessing I should have chosen aud_clamp as well. Cos I'm now getting rrod after 30 seconds trying to glitch.
And I obviously have it setup for aud_clamp.
Just want to be sure.
Re-created ecc with the above options selected, but can only test tomorrow.
Thanks again to all
 
A

abyss

VIP Member
Dec 16, 2010
187
0
Belgium
yes you need to select aud_clamp ;)
 
P

Psychomaniac

Full Member
Jan 20, 2010
34
0
South Africa
Dammit. No go. Rrod after about 32 seconds. Flashed stock nand back, no problems. Re-created the "jasper_hack_aud_clamp.bin" and wrote back. Still nothing. Attempts to glitch like it should, and after 30 seconds, rrod.
 
P

Psychomaniac

Full Member
Jan 20, 2010
34
0
South Africa
Thrice.

Initializing nanddump1.bin..
Jasper 16MB
Nand Initialization Finished
R-Jtag Selected
Patching Jasper version 2.3 SMC at offset 0x12BA
XeLL file created Successfully jasper_hack_aud_clamp.bin
Version: 03
Flash Config: 0x00023010
Writing Nand
jasper_hack_aud_clamp.bin
Done!
in 0:10 min:sec


Initializing nanddump1.bin..
Jasper 16MB
Nand Initialization Finished
Version: 03
Flash Config: 0x00023010
Writing Nand
nanddump1.bin
Done!
in 2:05 min:sec


Patching Jasper version 2.3 SMC at offset 0x12BA
XeLL file created Successfully jasper_hack_aud_clamp.bin
Version: 03
Flash Config: 0x00023010
Writing Nand
jasper_hack_aud_clamp.bin
Done!
in 0:10 min:sec


Hope you dont mind if i just pasted like above.
ALWAYS 30 seconds give or take a second

PS: 2nd time wrote orig nand back for testing purposes...obviously :D
 
Last edited:
You must log in or register to reply here.