Fender Amp Schematics

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Is this the problem with my brothers broken amp?? (it’s the circuit)?

k check this out, my brother’s fender amp that he has blew a fuse and when we put a new fuse in it blew it instantly..apparently, as we’ve looked online, this is common with the model amp that he has. so i was able to get a Schematic Diagram for the amplifier and this is what came up:

http://www.manualnguide.com/dl/10178/

you have to click on the download and view button near the top

look at parts CR5 and CR6 near the main amplifier chip near the bottom. i found on the actual circuit board that these diodes were completely shot. i tested them with a 9v battery and my multimeter and the current flowed both directions with maybe half a volt drop. these diodes effectively prevent a short circuit correct? so since these failed, this is what caused the fuse to blow and continue to keep blowing right? and if i replace these diodes with either a higher current/voltage rating (tho i think at 23 volts it’s the current that blew it) it will fix the problem?

CR5 and CR6 protect the output of the power amplifier from being pulled higher than the supply rails by the inductive “kick” of the speaker and the fact that a speaker also acts like a generator. CR5&6, 1N4003 are rated at 200 volts reverse and 1 amp continuous. You may want to try replacing them with 1N5402. (www.digikey.com)

Vintage Fender Amps and Guitars (1964 Blonde Bassman Cap Job)