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Old 05-15-2022, 05:17 PM   #31
Shinjinkun
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Join Date: Mar 2022
City & State: Altea
My Country: Spain
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Posts: 35
Default Re: Cyberpower CP900EPFCLCD - F03 Error

Quote:
Originally Posted by Per Hansson View Post
Yes exactly, just connect it where the fuse was before.
Perfect. I will get a lamp holder tomorrow. I remember I have one in the garage.


Quote:
Originally Posted by Per Hansson View Post
Cut away the heatshrink tubing from the old fuse and read what it says on the ends: there are fast and slow fuses and it is important to pick the right type...
Alrighty. I hope the fuse has some print on it. Otherwise, is going to be difficult to pick the fuse.

Quote:
Originally Posted by Per Hansson View Post
Yes some parts can be tested, like diode check the bridge rectifier for example.
I would also check the 550ohm resistor and optocoupler U3, this can be done with diode check too.
As for the rest as long as you use the lamp as a current limiter there is not that much that can go wrong...
The bridge rectifier is the BD1 component (BD107G), right? I measured it, without removing from motherboard, with the negative in the AC inputs, and was getting 0.595V in diode mode. The same putting the negative in the positive DC, so I am not sure if this means it works.
However, the U3 component doesn't give me any readings. I didn't remove it from the board either.
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