Omron M2 Basic - Teardown

We take a look inside this Blood pressure monitor by Omron. This is they type you may find at the doctors surgery. It has a fault with what I believe is a solenoid responsible for deflating the cuff after measurement has been taken. This is causing the cuff to stay inflated slightly or for it to not inflate at all. ------------------------------------------------------------------------ SOME TECHNICAL INFO Product Description Digital Automatic Blood Pressure Monitor Model OMRON M2 Basic (HEM-7116-E/HEM-7116-E8) Display LCD Digital Display Measurement Method Oscillometric method Measurement Range Pressure: 0 mmHg to 299 mmHg Pulse: 40 to 180/min. Memory Last measurement Accuracy Pressure: ±3 mmHg Pulse: ±5% of display reading Inflation Automatic by electric pump Deflation Automatic pressure release valve Pressure Detection Capacitive pressure sensor Power Source 4 “AAA” batteries 1.5V or AC/ DC adapter (optional, 6V 4W) Battery Life Capacity of new alkaline batteries is approx. 300 measurements Operating Temperature/ Humidity 10°C to 40°C/ 30 to 85% RH Storage Temperature/ Humidity/ Air Pressure -20°C to 60°C/ 10 to 95% RH/ 700-1060 hPa