What was found
RECEIVED STATIC INVERTER FOR OVERHAUL. PRELIMINARY INSPECTION REVEALED THAT THE PRINTED CIRCUIT BOARD (PCB) HAD BEEN MODIFIED WITH IC SOCKETS. THE IC CHIPS WERE INSTALLED IN THE SOCKETS AND SEALED WITH A SILICONE LIKE SUBSTANCE RATHER THAN BEING SOLDERED DIRECTLY INTO THE PCB. JUMPER WIRE INSTALLED ON NON COMPONENT SIDE OF PCB. POOR (COLD) SOLDER JOINTS THROUGHOUT THE PCB NO SEALANT (CONFORMAL COATING) APPLIED TO NON COMPONENT SIDE OF PCCB AFTER REWORK. (K)