On Wed, 23 Jun 2010 11:30:42 -0400, "DB" put finger to keyboard and composed:
The vertical amp IC is usually a SIP attached to a heatsink, around 9 pins or so.
Replace the electrolytic capacitors in the neighbourhood of this IC.
Typical part number prefixes are TA (Toshiba), AN (Matsushita, Panasonic), LA (Sanyo).
You can probably find a datasheet, with application circuit, here:
- Franc Zabkar