Masseuse Ultimate Chiro - Troubleshooting: Airbag Function Abnormalities - Inflation Issues; Air Pump Power Supply Check; Single Airbag Inflation Fault Resolution

3. Single group airbag does not inflate
1) Airbag broken makes deflate, please change the defect airbag
2) The valves broken, (check picture 2 resistance contrast). Find out and change the broken valves
3) As picture 22 and picture 23, find out valves driving circuit is correct, means there is DC24V from mother board to valves. Please
check the “4007” patch diode, “SIN482” field effect tube, resistance, “74H595” patch integration has lose welding or badness, Just
change the badness components or mother can solve the problem.
silicon controlled BCR5PM
Optocoupler 3023
Power AC24V of air pump
Figure 23. Real picture of pump & solenoid valve power supply
field- effect tube
STN4828
manifold block
74HCT595
solenoid valve of armrest
Solenoid valve of calf rest
Figure 22. Circuit of pump AC24V power supply
Audion S8050
Chip controls the air pump on or off signal
Silicon control
BCR5PM
optocoupler 3022
AC24V power output