Problems with Falcon and CR4 XL

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slackware2

Junior Member
Jan 21, 2014
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Hello,

I am having problems with CR4 XL and a falcon console - I can read and write nand via J-Runner, but the console won't boot up (there is no video on the screen) whenever I try to write Xell. If I disconnect the red wire (5v) from the CR4 XL and write a retail nand, the console boots up just fine.

I tried dips 3, 7 and 8 as well as 0, 10 and 100 Ohm jumpers.

Could you please help?


Console Type: Falcon
Programmer Used: JRP v2.0
Dashboard version: 2.0.17150.0
CB Version: 5774
Screenshot of NAND details from J-Runner: attached
J-Runner log: attached
Was the console working before you started: Y
Do you get a green debug light appear on the CR4 XL chip every 4-5 seconds: Y
How long is the light on for each time (be aware that if you're trying to work on a faulty console, this is not a T-X product issue!!): approximately 0.5 seconds
 

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slackware2

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Jan 21, 2014
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ultimate360 said:
Turn on dips 3 and 7. Many consoles do nothing without both of those on
Click to expand...
Thank you for the fast reply. Turning on dips 3 and 7 resulted in the disappearance of the green debug light on the CR4 XL and a blinking red light on the front panel.

turned-on-dips-3-and-7.JPG
 
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slackware2

Junior Member
Jan 21, 2014
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I am facing another [minor] issue - the console glitches successfully most of the time, but sometimes won't boot at all (1 time out of 20).

Should I start with shortening the wires and then play around with the dips or is it considered normal behavior for falcon boards?
 
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skillet34

skillet34

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Jun 21, 2012
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It is a tuning issue for you to find the best combination. Have you tried tuning all post bit jumper/ dip and JTAG settings with no cap installed?
 
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GeekHeat

GeekHeat

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slackware2

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Jan 21, 2014
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skillet34 said:
It is a tuning issue for you to find the best combination. Have you tried tuning all post bit jumper/ dip and JTAG settings with no cap installed?
Click to expand...
Thank you for the reply. I am now in the process of trying all possible capacitor and dip combinations. So far, setting dip 3 to on along with using a 22 pF capacitor seems to produce the best results.


GeekHeat said:
give this thread a read. the bit with wnyconsoles mentions smc_config


http://team-xecuter.com/forums/show...yr-Opus-Falcon-Jasper-Install-Guide-(R-JTAG-)
Click to expand...
Very interesting information, thank you for pointing me to it. Based on the information in that thread (and a few others), I made the following changed to my smc_config:
* Changed "thermal" from '80,75,78 - 100,100,102' to '75,70,70 - 80,75,75'.
* Changed "Power Mode" and "Power VCS Control" to '8280' and '8665', respectively.

(Screenshot is attached)



Here is how I plan to proceed:
1. Make the wires shorter
2. Replace the RST wire with a double-shielded one
3. Add a high quality ceramic 20 uF 16V capacitor in parallel to power line (between +5V and GND)
4. Keep trying various dip/capacitor combinations

How does that look? Is there anything else that I could do?
 

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slackware2

Junior Member
Jan 21, 2014
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I am still having the same issue - the Xbox won't boot 1 time out of 20. Whenever it doesn't boot, the RATER output shows the following: "Post 40 - Entrypoint of CD reached".

Here is what I have done:
* Replaced CPU_RST wire with a shielded one
* Added a high quality ceramic 20 uF 16V capacitor in parallel to power line (between +5V and GND)
* Tried all possible dip and resistor combinations

Could anyone please tell me if there is anything else that I could try?
 
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slackware2

Junior Member
Jan 21, 2014
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gavin_darkglide said:
Try the grounded shielded cpu_rst cable, and the top side cpu_rst point, this could be because of interference. Just a thought.
Click to expand...
Thank you for the suggestion. I connected a grounded shielded cable to the top side cpu_rst point and tried all possible dip, resistor, fat/slim switch combinations, but the result was the same. The pictures are attached.

I also tried the following: disconnected the red wire from the CR4 XL, reprogrammed the nand with the factory image, and powered the console up 30 times in a row. The system booted up 30 times out of 30. I then let the Xbox rest for a couple of hours and tried powering it up again without the CR4 XL attached. Again, the Xbox powered up successfully 30 times out of 30.

Is there anything else that I can do or should I just learn to live with it? Disappointing if so.
 

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slackware2

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Jan 21, 2014
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skillet34 said:
Have you tried different combinations on the JTAG qsb?
Click to expand...
Thank you for the suggestion. I only changed the 330/470 resistor jumper on the JTAG qsb and didn't touch any other switches on that board. Should I play around with the other switches as well?

Also, could RGHing the console eliminate the boot issues that I am having with RJTAG? I understand that RJTAG is supposed to be a 'better' glitching method since it generally requires fewer glitches compared to RGH2, but the inability to sometimes boot the console is somewhat annoying.
 
skillet34

skillet34

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I have not done RGH2+ on a phat yet I have done a few rjtag+ with great results. It may help. Easy enough to try. However I would think rjtag+ should work fine. When it boots is it booting quickly less than 3 cycles? Consistently, until the no boot? Would this 1 in 20 even be an issue under normal usage? I would stick with the aud clamp method no need to change that. Looking at the pics you do have 1/3 on that qsb bridged correct? In my prev post I was talking about the 330 470 jumper and switch just wasn't sure if you tried different settings etc. Does this console have a history of RROD? I see you have bolts in the heat sinks. Wonder if you have a issue with the console..... only things I can think of at the moment.....
 
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slackware2

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Jan 21, 2014
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skillet34 said:
I have not done RGH2+ on a phat yet I have done a few rjtag+ with great results. It may help. Easy enough to try. However I would think rjtag+ should work fine. When it boots is it booting quickly less than 3 cycles? Consistently, until the no boot? Would this 1 in 20 even be an issue under normal usage? I would stick with the aud clamp method no need to change that. Looking at the pics you do have 1/3 on that qsb bridged correct? In my prev post I was talking about the 330 470 jumper and switch just wasn't sure if you tried different settings etc. Does this console have a history of RROD? I see you have bolts in the heat sinks. Wonder if you have a issue with the console..... only things I can think of at the moment.....
Click to expand...
Thank you for the reply. The console usually boots in 1 cycle (sometimes in 2) until it doesn't boot at all. I guess it wouldn't be a huge issue under normal usage, but it is still annoying :) I do have 1/3 bridged on that qsb. Also, the console does not have a history of RROD - I was replacing the thermal paste one day and decided to replace the X-clamps with the bolts for good measure.
 
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