Date
1 - 17 of 17
Will installing the IC socket backwards cause the processor from failing to boot? #qcx
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rahul@...
Hello,
I just built the 40 m qcx+ kit. When I power it off a battery, the screen just displays one row of blocks. I read this may be caused due to a processor fault. My processor is installed the right way with the dimple matching but I installed the socket the opposite way. Does it matter? What other may cause my qcx+ from failing to boot right? |
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Installing the socket backwards will make no difference at all, so long as you put in the processor correctly (in other words, NOT matching the backward socket). Failure of the QCX to boot has been addressed many times; search the group archives. Most of the same issues apply to both the QCX and QCX+, though a few (like the processor startup issue related to the analog voltage going high before the digital voltage that needed to be fixed in early QCX versions) were fixed long ago. On Mon, Aug 17, 2020 at 9:40 PM <rahul@...> wrote: Hello, |
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rahul@...
I have Checked solder joints with a magnifying glass, checked if all pins are present in the IC socket, ensured all ICs have correct orientation with the dimple.
I know no component had been left out since I followed the manual step by step.
I searched the forums for troubleshooting tips. I then came across this post about some non programmed chips being sent out.
https://groups.io/g/QRPLabs/topic/28132677#28569
What should I do to check if my processor has been programmed?
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Paul AI4EE
Are you SURE that there are no bent pins between the microcontroller and the socket? On 8/17/2020 11:18 PM, rahul@... wrote:
I have Checked solder joints with a magnifying glass, checked if all pins are present in the IC socket, ensured all ICs have correct orientation with the dimple. |
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Alan G4ZFQ
the screen just displays one row of blocks.Did you look here http://www.qrp-labs.com/ultimate3/u3trouble.html#squares ? Did you find anything you could not check? 73 Alan G4ZFQ |
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rahul@...
yes I triple checked. All pins are straight. No bent pins
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Roger Hill
And the IC is in 'backwards' in the socket, so that it is correctly orientated to the board (forget the dimple)?? Roger G3YTN ---
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Roger Hill *************************** On 2020-08-18 13:53, rahul@... wrote:
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rahul@...
yes that is correct. The dimple on the IC matches the dimple on the board and the manual. So I can verify this is correct.
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Roger Hill
Ok, great. ---
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Roger Hill *************************** On 2020-08-18 13:59, rahul@... wrote:
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Did you check all the suggestions in the link provided above: http://www.qrp-labs.com/ultimate3/u3trouble.html#squares
Did you try another power source? |
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The suggested links were for the U3s. Look here for QCX. http://www.qrp-labs.com/qcx/qcxtrouble.html#blocks
It would help if you could provide feedback on what you find as you follow the steps outlined there. Also what battery? Needs to be at least a 12v. -- > I finally got it all together...now I can't remember where I put it< VY 73, Wes AE6ZM Sierra Vista, AZ
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rahul@...
Yes.
I tried powering it off a battery and a working power supply. I tried the approach of listening to the oscillator but I didn't hear anything on my SDR but this could also be due to a bad antenna (I only have a 2 m dipole) i checked for frequecny using my DVM but XTAL1 showed 0 Hz |
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rahul@...
Also the battery was a sealed 12 V AGM battery fully charged
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Alan G4ZFQ
I tried the approach of listening to the oscillator but I didn't hear anything on my SDR but this could also be due to a bad antenna (I only have a 2 m dipole)Just put a piece of wire into the antenna socket and place it near the crystal. Tune around 20Mhz, usually about +4KHz. Sometimes a counter will stop oscillation. Sorry for the wrong link although it is basically the same! 73 alan G4ZFQ |
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rahul@...
OMG! it suddenly started working!
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rahul@...
And now the same problem is occuring :(
Does it mean theres a loose contact somewhere? |
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rahul@...
YES! It was a bad connection between the barrel adapter and the PSU. Thank you amazing community
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