Fender princeton 112 plus blowing fuses??

[FENDERBENDER36963]

Hi all,this is my first post. hope someone can help the amp was running fine, then at a gig, i was running a POD 2 through the clean channel,when i swiched the pod2 for a distorted sound the amp went dead switching it off and back on again and it was ok on a clean tone from the pod2 but when a distorted sound was selected fron the pod2 again it cut out again. iv tested the pod2 with another amp[roland vga5] and all is ok. so left it alone for a while,then pluged a strat straight into the amp,turned up the volume and i could here it very faint. then it blue the fuse on the pc board. replaced it a few times after checking for shorts and any lose wires. but still blowing the fuse. HELP!!! thanks in advance.

[Jam]

Test

I would start with testing the power transistors or test to see if any of the diodes opened up or shorted

[FENDERBENDER36963]

112 plus blowing fuses??

Hi Jam, thanks for getting back to me.Im not totally sure how top test the transistors or diodes, do i have to de-solder them from the board to test? also what do i set my meter to? and how will i know if thay are not working? do you know the values i should get if thay are blowen? sorry for all the questions, but iv never done this before and a wee bit of no-how would save me loads of money by fixing it my self. thanks Jam, hope you can help.

[mxvin]

http://www.fender.com/support/amp_sc...us_Sche3BB.pdf

use the above schematic. Its the 112 plus model but it should be similar

[Jam]

Fender amp

Your meter should have a diode setting looks like a line and a arrow. You will use that for transistors and diodes You should de solder to test right but I would try to test them normal first to see if you see anything shorted before you de-solder . On power transistors their are three legs try different legs . The schematic posted should help you alot too . Make sure you unplug your amp when you test on this part

[FENDERBENDER36963]

Hi its been a while since i looked at this amp..... would any one be able to point out on schematic what diodes to test and what i should set my meter to and what values i should get.and what readings i should expect for the transistors too. Thanks. Stevie.