First entry at top of list - NO affiliation other than being satisfied customerCurrently unavailable to download? Something related to server issues .-. The fuse that goes to the left channel. Not one of the power fuses but the 1.5A fuse. It's so strange. The channel sounds fine while listening to but over a bit of time it starts to present audible power surges, then the fuse blows.
wont be a speaker fuse then . maybe its the rail fuse for that bad channel .It still blew without a speaker attached. Just tested that. Mind you it still didn't instant blow. It blew after a bit of time. My best guess is a thermistor or something overheating somewhere. I just don't know what it could be
Re-rating fuses is not the answerCap coupled output? Both fuses are the exact same but maybe slow blow would be better.
That's why you need a schematic and a DVOM at minimumHey that's why i'm asking here, I know there is something wrong just no idea what it could be. My best guess so far is a thermistor failing once it warms up. Allowing too much power to go through maybe?
I gave you the link to a manual with schematics in post #8I'm still trying to locate a schematic. I don't think it could be a short right? The fuse visibly slowly bent and blew. I'll try to add a few pics when I get home to see if that helps understanding. This thing was butchered at some point (someone replaced the output transistors without reattaching them to the heat sink) I started using my multimeter to compare channels (measurments here vs there) but i had to leave.
That's why you need a schematic and a DVOM at minimum
Fuses blow for one of two reasons
They "see" a current or a voltage that exceeds their rating, OR a short
You need to determine where the problem is using a schematic and checking voltages
A PTC (Positive Temperature Coefficient), if it were equipped with one (highly unlikely but I'll never say never), would reset after the receiver cooled down, not cause a fixed value fuse to blow
You have a basic power supply, power amp, pre-amp transistor or short problem
Even possible you have a thermal problem with an output device (another unlikely but never say never)
A schematic (which I don't have) will help you to eliminate all of the "could bes" and allow you to focus your diagnosis in a more meaningful way rather than guessing