Ceriatone

[mkstylee]

Hi all,
I have a ceriatone 2204 clone and the pilot bulb has blown it looks the same as a JTM 45 one the red square sticking out type ,anyone know what voltage it would be?

[sikter]

Hi all,
I have a ceriatone 2204 clone and the pilot bulb has blown it looks the same as a JTM 45 one the red square sticking out type ,anyone know what voltage it would be?

I think you shoud just remove old bulb, turn the amp on and read voltage with your multimeter.
Even if you find schematics, it doesn't mean it's been followed all the way up...

[Marker]

Sikter is right, just measure the voltage drop on the bulb connector.


According to the manufacturer online layout it should be a 6,3v bulb just like the Marshall they're cloning - the power supply comes from F1 and F2 outputs of the power transformer, each delivering 3,15v:



Funny how these companies clone an entire amp (even the names and not just one model) and don't get sued; I wonder if Marshall has any brand protection department to handle these cases.

[mkstylee]

Thanks Marker ,mine is a bit older than 2013 look at different years schematics and the volts change, I don't thinks you can pull the bulb its sealed into the red square, the whole thing has to be changed I think.
Think JTM 45 bulb. that's whats on here same as the vintage modern aswell but red.
Thanks anyway

[Marker]

I know which indicator it is, it's the req square indicator with a bulb for working at 6,3v.
I've installed one of those in my Vintage Modern:





I've bought it from Ebay, it's a original Marshall part and I'm pretty sure your 2203 uses one of these.

[mkstylee]

That's it marker ,ok problem solved , i'll check it as you said with a multimeter just to confirm.
Many thanks for your help