DeLonghi Magnifica S Smart won't power on, fuse worth checking?

[Thomas Martinez]

See some posts about DeLonghi machines dying out of nowhere. First thing people usually checks is the machine for power issues. For the Magnifica S Smart models, the fuse and PCB is located above the water tank. To access them, remove the covers from the machine.
The easiest way to test for power issue is to unplug the machine, remove the covers and use a multimeter to test the fuse for continuity. If you determine the fuse is blown, replacing the fuse will fix the issues with the machine. The hardest part of this repair is removing the covers from the machine. The machine seems to have some clips that holds the housing together that can be tricky to release. I have not encountered any screws on these moddern models so it seems like the clips are what hold the housing together.

 

[Prehistoric Plunger]

Did mine about 6 month ago, fuse was indeed blown. Replaced it and it has been fine ever since. Getting to the housing seemed like the most difficult part though. There are clips on the sides that you have to pop to get the panel to pulling up.

 

[Feverish Disco Dynasty]

if the fuse blew theresusually a short somewhere or a stuck triac. Just slapping a new fuse in without checking the pumps or heating element will pop the fuse again real quick.

 

[Tough Turtle]

wait so the fuse is the thermal one or is it like an inline glass fuse on the board? im a bit confused on which one were talking about here

 

[Shado]

Honestly for what these machines cost you'd think they'd build them so the covers comes off without a fight. Italian design my ass.

 

[Prehistoric Plunger]

wait so the fuse is the thermal one or is it like an inline glass fuse on the board? im a bit confused on which one were talking about here

Glass fuse on the PCB, not the thermal one on the boiler. Two different thing. The thermal one trips on overheat, the PCB fuse blows from electrical fault.

 

[Tough Turtle]

Glass fuse on the PCB, not the thermal one on the boiler. Two different thing. The thermal one trips on overheat, the PCB fuse blows from electrical fault.

ok that helps. So if the glass one blows is it usually just bad luck or does it mean the boiler triac is fried? trying to figure out if i should even bother

 

[Star]

I replaced the fuse on a Magnifica (not the Smart but same family) and it lasted about a week before going again. Ended up being the SSR on the board cooked itself. So yeah, fuse is rarely the root cause, its a symptom.

 

[Feverish Disco Dynasty]

I replaced the fuse on a Magnifica (not the Smart but same family) and it lasted about a week before going again. Ended up being the SSR on the board cooked itself. So yeah, fuse is rarely the root cause, its a symptom.

this. People treat the fuse like a fix when its actually a diagnostic clue. Blown fuse means something downstream pull too much current

 

[Henry S.]

top cover trick: pop the bean hopper out first, then theres two screws under the drip tray area that everyone misses. After that the top lift straight up. Dont pry from the front you'll break the latch tabs

 

[Motionless Mantis]

lol my delonghi died last year and i just bought a new one. Life's too short

 

[Tough Turtle]

top cover trick: pop the bean hopper out first, then theres two screws under the drip tray area that everyone misses. After that the top lift straight up. Dont pry from the front you'll break the latch tabs

is it safe to probe the board with the unit unplugged but capacitors still charged? like how long should i wait before sticking a multimeter in there