# Faulty LimeSdr Mini

**URL:** <https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829>\
**Category:** LimeSDR\
**Created:** [12 June 2019 15:38 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829 "2019-06-12T15:38:37Z")\
**Posts on this page:** 6\
**Page:** 1

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**Author:** ![smtguide](https://avatars.discourse-cdn.com/v4/letter/s/b487fb/32.png) [@smtguide](https://discourse.myriadrf.org/u/smtguide)\
**Post date:** [12 June 2019 15:38 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829/1 "2019-06-12T15:38:37Z")

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have tested on linux LimeQuickTest --no-gui and with windows on USB 3.0 for both and both tell me faulty device. How do have it replaced??

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**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [13 June 2019 05:26 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829/2 "2019-06-13T05:26:39Z")

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Post log file here, please.

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<div class="post-metadata">

**Author:** ![smtguide](https://avatars.discourse-cdn.com/v4/letter/s/b487fb/32.png) [@smtguide](https://discourse.myriadrf.org/u/smtguide)\
**Post date:** [13 June 2019 14:27 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829/3 "2019-06-13T14:27:57Z")

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![sdr-mini-fail](https://canada1.discourse-cdn.com/flex034/uploads/myriadrf/original/2X/3/38134255675e17af5485ef7a0ab7d2c0b48923d5.jpeg)

**Windows Log (No USB 3.0)**

LimeSDR-Mini\_1D40EE3D36AF1C.log  
[TESTING STARTED]  
-\>Start time: Thu Jun 13 22:29:20 2019

-\>Device: LimeSDR Mini, media=USB 2, module=FT601, serial=1D40EE3D36AF1C, index=0  
Warning: USB3 not available  
Serial Number: 1D40EE3D36AF1C

[Clock Network Test]  
-\>REF clock test  
Test results: 16606; 29803; 43000 - PASSED  
-\>VCTCXO test  
Results : 6711036 (min); 6711197 (max) - PASSED  
-\>Clock Network Test PASSED

[FPGA EEPROM Test]  
-\>Read EEPROM  
-\>Read data: 12 06 1C 12 06 1C 02  
-\>FPGA EEPROM Test PASSED

[LMS7002M Test]  
-\>Perform Registers Test  
-\>External Reset line test  
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD  
Reg 0x20: value after reset 0x0FFFF  
-\>LMS7002M Test PASSED

[RF Loopback Test]  
-\>Configure LMS  
SetFrequencySXT(1250 MHz) - cannot deliver frequency  
TuneVCO(CGEN) - failed to lock (cmphl!=0)  
SetFrequencyCGEN(122.88 MHz) failed  
Failed to set sample rate  
-\>RF Loopback Test FAILED

=\> Board tests FAILED \<=

Elapsed time: 2.79 seconds

**Ubuntu 18.04 LTS SERVER (USB 3.0)**

[TESTING STARTED]  
-\>Start time: Thu Jun 13 14:38:55 2019

-\>Device: LimeSDR Mini, media=USB 3.0, module=FT601, addr=24607:1027, serial=1D40EE3D36AF1C  
Serial Number: 1D40EE3D36AF1C

[Clock Network Test]  
-\>REF clock test  
Test results: 39596; 52793; 454 - PASSED  
-\>VCTCXO test  
Results : 6711046 (min); 6711207 (max) - PASSED  
-\>Clock Network Test PASSED

[FPGA EEPROM Test]  
-\>Read EEPROM  
-\>Read data: 12 06 1C 12 06 1C 02  
-\>FPGA EEPROM Test PASSED

[LMS7002M Test]  
-\>Perform Registers Test  
-\>External Reset line test  
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD  
Reg 0x20: value after reset 0x0FFFF  
-\>LMS7002M Test PASSED

[RF Loopback Test]  
-\>Configure LMS  
SetFrequencySXT(1250 MHz) - cannot deliver frequency  
TuneVCO(CGEN) - failed to lock (cmphl!=0)  
SetFrequencyCGEN(122.88 MHz) failed  
Failed to set sample rate  
-\>RF Loopback Test FAILED

=\> Board tests FAILED \<=

Elapsed time: 1.88 seconds

By looking at your SCH I noticed you have IC12&IC13 LXDC55KAAA-205 As power Regulators, to save time you think changing one them should solve the issue??

Thank you very much for your help, We are developpers and time frame is a big issue for us.

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<div class="post-metadata">

**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [14 June 2019 12:49 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829/4 "2019-06-14T12:49:40Z")

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Hi @smtguide,

Could you run this version of [QuickTest](https://1drv.ms/u/s!AsTX3WCH_RLCjCk6fiYXYBAhVtOM) on Win machine and post the log file here again, please.

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<div class="post-metadata">

**Author:** ![smtguide](https://avatars.discourse-cdn.com/v4/letter/s/b487fb/32.png) [@smtguide](https://discourse.myriadrf.org/u/smtguide)\
**Post date:** [14 June 2019 15:07 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829/5 "2019-06-14T15:07:30Z")

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[TESTING STARTED]  
-\>Start time: Fri Jun 14 23:05:05 2019

-\>Device: LimeSDR Mini, media=USB 2, module=FT601, serial=1D40EE3D36AF1C, index=0  
Warning: USB3 not available  
Serial Number: 1D40EE3D36AF1C

[Clock Network Test]  
-\>REF clock test  
Test results: 56296; 3957; 17154 - PASSED  
-\>VCTCXO test  
Results : 6710997 (min); 6711159 (max) - PASSED  
-\>Clock Network Test PASSED

[FPGA EEPROM Test]  
-\>Read EEPROM  
-\>Read data: 12 06 1C 12 06 1C 02  
-\>FPGA EEPROM Test PASSED

[LMS7002M Test]  
-\>Perform Registers Test  
-\>External Reset line test  
Reg 0x20: Write value 0xFFFD, Read value 0xFFFD  
Reg 0x20: value after reset 0x0FFFF  
-\>LMS7002M Test PASSED

[RF Loopback Test]  
-\>Configure LMS  
TuneVCO(CGEN) - failed to lock (cmphl!=0)  
SetFrequencyCGEN(61.44 MHz) failed  
TuneVCO(CGEN) - failed to lock (cmphl!=0)  
SetFrequencyCGEN(122.88 MHz) failed  
Failed to set sample rate  
-\>RF Loopback Test FAILED

=\> Board tests FAILED \<=

Elapsed time: 2.80 seconds

**Ubutnu 16.04 GQRX Test**

Loading configuration from: “/home/user/.config/gqrx/default.conf”  
Configuration file: “/home/user/.config/gqrx/default.conf”  
gr-osmosdr v0.1.x-xxx-xunknown (0.1.5git) gnuradio 3.7.10  
built-in source types: file osmosdr fcd rtl rtl\_tcp uhd plutosdr miri hackrf bladerf rfspace airspy airspyhf soapy redpitaya  
XmbTextListToTextProperty result code -2

* * *

* * *

No change in output device:  
old:  
new:

Failed to set RX input rate to 5e+06  
Your device may not be working properly.

IQ DCR samp\_rate: 5e+06  
IQ DCR alpha: 2e-07  
Changing NB\_RX quad rate: 96000 -\> 5e+06  
Requested sample rate: 5000000  
Actual sample rate : “5000000.000000”  
New FFT rate: 25 Hz  
Segmentation fault (core dumped)

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<div class="post-metadata">

**Author:** ![Zack](https://yyz2.discourse-cdn.com/flex034/user_avatar/discourse.myriadrf.org/zack/32/89_2.png) [@Zack](https://discourse.myriadrf.org/u/Zack)\
**Post date:** [17 June 2019 07:39 UTC](https://discourse.myriadrf.org/t/faulty-limesdr-mini/4829/6 "2019-06-17T07:39:20Z")

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Hi @smtguide,

It looks like there is a fault in your board, sorry.