Hi Everyone, I have a Crate G130C Amp that I bought new in in the mid 90's. At some point I started having an issue with the Amp where the output sound would fade out. If it would cool down, it would temporarily start working again. I sent the Amp in to SLM Electronics / Crate, in St Louis, Missouri and they fixed the issue. It worked fine for many years but has developed the same problem again. As you probably know, they have went out of business. I took the circuit board out of the Amp and have replaced a few resistors that had split open from overheating,but that didn't fix the main problem. I recently found the paperwork that SLM Electronics sent me when they repaired the Amp before. It says that they had replaced a "Leaky Zener Diode for the low voltage power supply" They unfortunately didn't put a part number for the Zener Diode on the invoice. I have ran across the schematics for this Amp but I can't tell where the Zener Diode is for the low voltage power supply. Could someone please help direct me to where the Zener Diode is located on the circuit board?