Acoustic 370 blows internal fuse when turned on

[KeyWestBassPlayer]

370

no I do not but will aquire one tomorrow

[Phostenix]

Here's a good thread for testing diodes & transistors:

Bipolar Junction Transistor Testing Basics - AudioKarma.org Home Audio Stereo Discussion Forums

[Phostenix]

To access all the output transistors on the 370, you will need to either remove the preamp board or remove the screws holding the power amp board/heatsink assembly from the chassis. Removing the preamp board means removing all the front knobs & the nuts mounting the pots to the chassis. Removing the heatsink screws so that you can move that block around means having to replace the heatsink compound between it & the chassis when you're done. Not a bad idea anyway considering the age of these amps, but you will need to get some heatsink compound (I assume).

If you remove the preamp, you also will have to remove the input jacks & de-solder the bright switch.

[Phostenix]

And here's the info on building a light bulb limiter:
Light Bulb Current Limiter

[KeyWestBassPlayer]

ok thanks I will start there and read up

[Phostenix]

What's your timeline on this repair? Do you need to gig with it? Oh, and how are your soldering skillz? From the looks of it, the traces on these boards are easy to lift (from what I'm seeing in the one I've got open).