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November 26, 2020, 09:44:24 PM

Author Topic: Blown Fuse While Checking The Transformer  (Read 734 times)

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Offline StevePL

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Blown Fuse While Checking The Transformer
« on: May 17, 2018, 12:48:26 PM »
The fuse blew while checking the transformer, pulled the fuse from my Crack and that one blew too.
Wired as illustrated. No damage to any wires, used the supplied power lead and the one from my Crack.
Crack Speedball, HD600, HD 25 300ohm.
Audirvana +, Schiit Modi Multibit, Smash-Smash Up Clarity MR, Rotel 956 bridged 2x Mono, Revel Performa F30.
Fiio X5ii, Quickie, Quicksand, Blumenstein Orca

Offline fullheadofnothing

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Re: Blown Fuse While Checking The Transformer
« Reply #1 on: May 17, 2018, 02:04:40 PM »
Pictures could be helpful.
Joshua Harris

I Write the Manuals That Make The Whole World Sing
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Offline StevePL

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Re: Blown Fuse While Checking The Transformer
« Reply #2 on: May 18, 2018, 06:40:40 AM »
I'm going to try to get some new fuses today. I am also going to try a different multimeter, I have a suspicion that the one I use is fine with ohms but doesn't like AC power.
Here are some pictures. I'm going to reflow the joint on the power switch closest to the edge of the chassis

Crack Speedball, HD600, HD 25 300ohm.
Audirvana +, Schiit Modi Multibit, Smash-Smash Up Clarity MR, Rotel 956 bridged 2x Mono, Revel Performa F30.
Fiio X5ii, Quickie, Quicksand, Blumenstein Orca

Offline Paul Birkeland

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Re: Blown Fuse While Checking The Transformer
« Reply #3 on: May 18, 2018, 09:33:26 AM »
Can you take a top down shot from above?
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline StevePL

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Re: Blown Fuse While Checking The Transformer
« Reply #4 on: May 18, 2018, 10:04:03 AM »
Here you go.
Crack Speedball, HD600, HD 25 300ohm.
Audirvana +, Schiit Modi Multibit, Smash-Smash Up Clarity MR, Rotel 956 bridged 2x Mono, Revel Performa F30.
Fiio X5ii, Quickie, Quicksand, Blumenstein Orca

Offline Paul Birkeland

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Re: Blown Fuse While Checking The Transformer
« Reply #5 on: May 18, 2018, 11:10:46 AM »
With the power unplugged, remove the red wire that connects to the power transformer, then leave it sticking up in the air and retest.

With that wire disconnected, check the DC resistance between terminals 1 and 2 on the power transformer.

-PB
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man

Offline StevePL

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Re: Blown Fuse While Checking The Transformer
« Reply #6 on: May 18, 2018, 11:25:08 AM »
With the power unplugged, remove the red wire that connects to the power transformer, then leave it sticking up in the air and retest.

With that wire disconnected, check the DC resistance between terminals 1 and 2 on the power transformer.

-PB
I'll try this once I've been to the store to get some new fuses.
Crack Speedball, HD600, HD 25 300ohm.
Audirvana +, Schiit Modi Multibit, Smash-Smash Up Clarity MR, Rotel 956 bridged 2x Mono, Revel Performa F30.
Fiio X5ii, Quickie, Quicksand, Blumenstein Orca

Offline StevePL

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Re: Blown Fuse While Checking The Transformer
« Reply #7 on: May 19, 2018, 04:05:56 PM »
It was the multimeter.
The fuse didn't blow and all voltages checked within specs with a different multi meter connected.
Crack Speedball, HD600, HD 25 300ohm.
Audirvana +, Schiit Modi Multibit, Smash-Smash Up Clarity MR, Rotel 956 bridged 2x Mono, Revel Performa F30.
Fiio X5ii, Quickie, Quicksand, Blumenstein Orca

Offline Paul Birkeland

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Re: Blown Fuse While Checking The Transformer
« Reply #8 on: May 20, 2018, 07:39:31 AM »
Good meters are getting much, much harder to come by these days!  I'm glad you got that issue sorted early. 
Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man