Peavey Max 115 Schematic Exclusive

The most common failure in original MAX 115s is cracked solder joints on the power amp board – not dead transistors. Before replacing parts, reflow the large transistor pins and the bridge rectifier. The schematic shows these as Q5–Q8 and D1–D4.

Also, if your MAX 115 hums badly, check C31 and C32 (main filter caps – 4700µF/63V). The schematic marks them as the first suspect for 60/120Hz noise. peavey max 115 schematic exclusive

Before probing voltages, you must understand the signal path. The Peavey MAX 115 is deceptively simple. It consists of four distinct sections: The most common failure in original MAX 115s

The schematic reveals a hybrid topology that is unique to the MAX 115 (not shared with the MAX 110 or 112): Exclusive insight: Early versions used a single JFET

The preamp is where your bass first lands. It handles:

Exclusive insight: Early versions used a single JFET input buffer; later revisions (post-2012) added a dual op-amp for lower noise. Check your board for IC1. If it’s a 4580, you have the updated low-noise spec.