PHILIPS MEDICAL SYSTEMS. HeartStart OnSite. M5066A. Automated External Defibrillator. OWNER'S MANUAL. Edition 14. IMPORTANT NOTE:.This manual is intended to provide technical and product information that generally applies to the Philips. HeartStart OnSite, the Laerdal HeartStart HS1, and HeartStart OnSite Defibrillator. OWNER'S MANUAL. Guide to Set Up, Operation, Maintenance, and Accessories. M5066A. Edition 14 HeartStart OnSite Defibrillator. OWNER'S MANUAL. Guide to Set-Up, Operation, Maintenance, and Accessories. M5066A. Edition 7