What was found
HAD OVER VOLTAGE SYS 1 UNDER VOLTS SYS 1, OVER EXCITED SYS 1, UNDEREXCITED SYS 1, IF EXTINGUISH LIGHTS, WARNING LIGHTS PANEL WILL NOT OPERATE CORRECTLY. ONLY APU AND APU BLEED LIGHTS WILL TEST. INSPECTED NR 1 GCU FOUND ELECTRICAL RECEPTACLE AND GCU PINS BURNT. UPON INSPECTION AS TO THE ROOT CAUSE OF THIS DISCREPANCY. MX DISCOVERED SMOKE IN THE E/E COMPARTMENT DUE TO THE GCU BOX BEING FRIED. AUXILIARY GENERATOR PANEL TEST AND RESET CHECKS GOOD.