I'd like to save my'90's Alpine from the e-waste bin. It made a few loud pops on all 4 channels and then no sound. Upon dissection, I saw that a few caps, zener diodes and resistors exceeded their themal limits. From what little I could find in a search it seems to have been a common problem- the resistors r527, r528 and the surrounding zeners and caps are charred as is the back of the board. Im pretty sure the board will clean up but does anyone have access to the circuit schematic? I love how clean and punchy this amp made my '90's BMW separates sound, with an OG Phoenix Gold running a single 10" sub.Should I just give up on this Japanese-made beauty and buy something else or should I save it?thanks in advance for your help.,BT
P.S. Sorry, I posted this in solid state earlier. Mods - delete as you see fit.
P.S. Sorry, I posted this in solid state earlier. Mods - delete as you see fit.
I don't have the diagram but if you cannot find a free copy, you can buy a copy here:
ALPINE 3553 service manual | servicemanuals.net
ALPINE 3553 service manual | servicemanuals.net
I have found a 3550 here;
Download the Alpine 3550 manuals for free - Hifi Manuals
if that is similar.
Download the Alpine 3550 manuals for free - Hifi Manuals
if that is similar.
Thanks for the quick replies. I'd like to find a free manual, if at all possible. The car is in the middle of an expensive engine swap as well.
While similar, the 3550 is a different animal. It only uses a few of the same transistors that I need, but I can read them anyway. If only the baked goods were legible.
Grrr, its at work along with the sheet I made up on what I needed. If you're willing to pop the lid, could you read off some resistor markings when I get them?
It might be. There is a cluster of caps, zeners, transistors and resistors around r527, r528. I mostly need the color lines on those resistors. Might need to be real close up. If you can see the colors that will really
help.
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