Corsair HX850w blown internal fuse?

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

Beg pardon, Mikay

[mikay786]

Re: Corsair HX850w blown internal fuse?

No it didn't, kept blowing. Although my knowledge was a lot less then, just gave up on it.

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

No it didn't, kept blowing. Although my knowledge was a lot less then, just gave up on it.

Yes, suspecting a short somewhere after reading the review on HardOCP with the secondary PCBs; the fuse is gone & the fan tested good, there is, however, a sign of burning on the neutral pin on the kettle lead socket; looks like quite a surge



http://www.hardocp.com/article/2015/...3#.VtZu0KtxqJD



Got it on eBay, the thing is in sparkling condition; looks like it has been used for only a few weeks



PS If you still have the fuses will scoop them from you if you like; just PM with paypal details

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

Got this pair to solve the fuse issue



http://www.ebay.co.uk/itm/271953391800

http://www.ebay.co.uk/itm/301782247104

[mikay786]

Re: Corsair HX850w blown internal fuse?

Sorry I didn't check back, would have sent you one out!

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

It's OK Mikay; was keen to try a 12a fuse, but hey-ho



So got the fuse holder on, got the fuse in - still nothing



Discovered that the rocker switch is flaky - another common fault with this model

It is effectively constantly on; there is continuity whatever state it's in & it doesn't switch completely to the off position like it should

Going to try a switch from an older PSU; will post back the outcome

Tested this one for continuity & it isolates / conducts as it should



Don't know if the PSU is refusing to start because of this, don't see why it should

[japlytic]

Re: Corsair HX850w blown internal fuse?

It's OK Mikay; was keen to try a 12a fuse, but hey-ho



So got the fuse holder on, got the fuse in - still nothing



Discovered that the rocker switch is flaky - another common fault with this model

It is effectively constantly on; there is continuity whatever state it's in & it doesn't switch completely to the off position like it should

Going to try a switch from an older PSU; will post back the outcome

Tested this one for continuity & it isolates / conducts as it should



Don't know if the PSU is refusing to start because of this, don't see why it should

What is the brand of rocker switch which was defective and what was its ratings?

Today, I've had a master switch fail on a home theatre power strip (Spikefree) after being in service for over 4 years with operation of this switch when our home theatre system was not in use - replacing it fixed the problem.
I also recommended only operating this switch under zero to light load.

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

What is the brand of rocker switch which was defective and what was its ratings?

Today, I've had a master switch fail on a home theatre power strip (Spikefree) after being in service for over 4 years with operation of this switch when our home theatre system was not in use - replacing it fixed the problem.
I also recommended only operating this switch under zero to light load.

Haven't removed it yet; the lives are poked through it & heavily soldered (4 terminals) whereas the replacement just has 2

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

OK; took the switch off & during this act the flexed copper / brass inside it clicked back into place; will still need replaced though but now tests good

Notice a couple of small caps after the pwm controller are not letting current through as well as a couple of resistors; will post pics later



Got a TX850V2 for £36 so this will probably be a nothing more than a low priority project now; will probably just sell it for a few quid for spares, or a bit more if it gets working

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

3 resistors, 1 Cap

[Behemot]

Re: Corsair HX850w blown internal fuse?

Just use an incandescent light bulb in series with the unit, that way you will see it is still shorted immediatelly without burning anything.

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

Just use an incandescent light bulb in series with the unit, that way you will see it is still shorted immediatelly without burning anything.

If you mean test the y caps by sticking the kettle lead in the PSU socket & attaching a lamp on the other side, then already thought of that



Just did this; the y caps are bad; will order some



Need to get new tips or new iron for those small resistors & cap though

[Behemot]

Re: Corsair HX850w blown internal fuse?

Not sure you what you mean, I mean what I wrote: incandescent light bulb in series. May be a whole old lamp, just rewired so it is plugged in series.

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

Yes it was wired in series, just not with the rest of the unit attached; will put it all back together when the y caps are replaced & test it then, but still sure those small components are bad

Cheers for replying

[Ricardo Q]

Re: Corsair HX850w blown internal fuse?

Replaced the y caps & repeated the lamp test: Success!



Blew the fuse again, just like Mikay's PSU; have 4 more but it's just going to blow again



Is it worth ripping out the FETs & testing them?

[Stefan Payne]

Re: Corsair HX850w blown internal fuse?

What else is there to do?!

If the fuse blows, something behind it is blown.
The fuse is there to protect everything, if something goes wrong.

If the fuse blows, there has to be something wrong with the fuse - it never is only the fuse, NEVER!
Well, in 99 out of a 100 cases