Question Musical Fidelity P270 was struck by lightning...

pincium

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Oct 9, 2022
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Amplifier:
Musical Fidelity P270
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Problem:
Lightning struck near my apartment at night.
The next day when I tried to turn on my device, smoke started pouring out.

What is broken:
This is an image from the web and the problem area is circled. This is where the capacitor and resistor are located. The value of the capacitor can be seen and no problem, but the resistor is so burnt that the value cannot be read. There are two resistances. One on each side. This connects the amplifier ground to the mains ground.
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Situation:
My cousin is a good electronics mechanic.
Since the device is very old and out of warranty, and I don't have the money to send it abroad to an authorized service center (I live in Serbia), I let him fix it.
Since everything is burned, you can't tell which parts are involved, he needs an electronic circuit diagram.
I couldn't find an electronic circuit diagram on the internet.
I was looking for an electronic schematic of this device from the manufacturer. They forwarded my email to the authorized service. Of course they told me to bring it to them. There was no talk of an electronic circuit diagram.

Possible solutions:
- One of you has an electronic circuit diagram (or a link);
- one of you has the same amp, (take some photos of the problematic part).

Many many thanks

(Google Translate...) ;)

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Gray

Well-known member
the problem area is circled. This is where the capacitor and resistor are located.
The component in your circle looks to me like a bridge rectifier (which has 4 contacts), not a resistor.
See if your cousin agrees.

I'm a bit concerned about other (more sensitive) electronic products in your home.
Even when not visibly damaged and still working, their lives can be shortened).
 

Roger_A

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Mar 31, 2010
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You could try contacting Arkless Electronics. He regularly posts on at least one other forum and designs and repairs amplifiers. From memory he once worked with or for MF and is knowledgeable about their amps. He may be able to help with circuit diagrams and what to check as there may be other damage which is not obvious.
Note that I have no connection with his company other than reading his posts so can't guarantee what response you may get.
 
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