Power supply is good. Is there a fuse to look for?

Ed Rios
KP4AKB/W8

Hi, Ed
No, no fuse.
No green light flashing after pressing the button ?
(This device is for 5V, not more ! There are many regulaters on the PCB that die beyond 5.5 V)

Regards, Frank

Frank

This event is my fault. I plugged the wrong connector into the CalibriDDC. 12 volts rather than 5 volt. Now I am very sad to loose my wonderful SDR Receiver. No excuse! I will have to label the many adapters to know what voltage is at the end.



Ed Rios
KP4AKB/W8

Hello Ed,

maybe there is a little hope !
I did´n study electronics and regretfully have no ColibriDDC schematics, but I took a look at the inside of my ColibriDDC.
There is a small smd element with a nearby printed line "FS1_PWR", could mean "fuse1_power". If it looks different from
the one in my photo and the resistance between both poles is significantly more than a couple of ohms then changing this smd element would be, what I call " a "little hope".
(to dismantle the box you need a really tiny torx screwdriver nr. 6.

Good luck!
Regards from Frankfurt
Frank

Frank I owe you.

I saw the fuse on the board and carefully measured across. It is open. Inserted the power supply on the side that says FS1 I was able to measure 4.99 volts. On the other side was Zero. I carefully used a a sharp paper clip and placed it across the fuse. Nothing happened until I pressed the power switch and "Wallah" the green light started blinking again. Now I just need to find the a fuse replacement.

This good info for the next poor ham that commits the grave mistake of plugging in the wrong power cord.

Thanks again and BTW who are you?

Ed Rios
KP4AKB/W8
Columbus, OH

Could I possibly have the value of FS1 on the ColibriDDC. Need to get a replacement. I am quite capable of replacing it.

Ed Rios
KP4AKB/W8

Hi Ed,

0.7 A at 125% = 0.875 A.
At least one of the black bricks near the fuse is likely to be a Suppression Diode.
In case of over voltage it produces a short circuit current.
So, to provide the sanity of the following parts on the board don´t choose more than 1 A.
Even if you might have addited the BPF.

Regards from Frankfurt, Frank

Frank and everyone else on the board. My ColibriDDC has risen from death. After ordering the $0.25 fuse from Digi-Key I was able to replace it in about 5 minutes. ColibriDDC is working again.

Thanks to all

Ed Rios
KP4AKB/W8
Columbus, OH

BTW I bought 10 fuses.