Anushri power supply problem?

Ola there !

I have an anushri non working here, when i try to check the voltage between one ground, and the back of the power supply plug on the pcb, I got something like 1-3V always moving ?

Can the capacitors dead ?

Thanks for you help.

Bye

Any idea ?

“and the back of the power supply plug on the pcb”

Not sure what you mean here… Is that supposed to correspond to ground (in which case you observe a huge voltage difference between different ground points), or to the actual input voltage?

In the second case, it looks like there is a short somewhere. Try removing all ICs first, in case one of them is damaged or inserted backwards.

Ok, i removed all the IC, i replaced the both Vreg, it is ok for the +5V. but i only got 0.5V at the output of the 7905, i replaced it again, but same voltage.

Edit : Shame on me :smiley: Better with the 1054 :smiley:

Without the LT1054, it’s normal that you won’t get any negative voltage.

What’s is the use for the 1x 2.2nF styroflex capacitor (C9) ?

Mine is dead, and i would try the anushri, what thing i can expect if i leave it out ?

> what thing i can expect if i leave it out ?

No VCO.

ok, so i will wait to get one ! Thanks for your help !