emilesinclair
New member
- Joined
- Oct 27, 2020
- Messages
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i am new here so hello everyone!!
i just got into the mesa family! bought a mark iii online, but unfortunatly, i received the amp damaged (3 broken tubes) and when i switched it on (with new tubes obviously) i got no sound, very (very!) distant guitar when i dial the volume up but i heard "pop" and bursting sounds and so i switch back off the amp immediately..
i open it and saw that a part of the circuit looked burnt. 2 diodes seem to be really burnt.
i did not smell smoke when i switch the amp on.
it's an export model and since i live in france i put the selector on 220V so i guess it's all good.
i don't know what the ground switch is about, it was in the middle position.
here is a picture of the burnt circuit.
http://emilesinclair.free.fr/pictures/mark%20iii%20repair/
i recall that i had a en effect pedal and i burnt a diode someday when putting the wrong polarity. so maybe something went wrong at some time and these diodes are for protection?
i am a noob at electronics but i can solder and if i only need to replace the diodes, i can do that i guess!
thanks in advance for your time and tell me if it's the wrong place to put this topic or something else.
i just got into the mesa family! bought a mark iii online, but unfortunatly, i received the amp damaged (3 broken tubes) and when i switched it on (with new tubes obviously) i got no sound, very (very!) distant guitar when i dial the volume up but i heard "pop" and bursting sounds and so i switch back off the amp immediately..
i open it and saw that a part of the circuit looked burnt. 2 diodes seem to be really burnt.
i did not smell smoke when i switch the amp on.
it's an export model and since i live in france i put the selector on 220V so i guess it's all good.
i don't know what the ground switch is about, it was in the middle position.
here is a picture of the burnt circuit.
http://emilesinclair.free.fr/pictures/mark%20iii%20repair/
i recall that i had a en effect pedal and i burnt a diode someday when putting the wrong polarity. so maybe something went wrong at some time and these diodes are for protection?
i am a noob at electronics but i can solder and if i only need to replace the diodes, i can do that i guess!
thanks in advance for your time and tell me if it's the wrong place to put this topic or something else.