Masseuse Ultimate Chiro - Troubleshooting: Back Heating Not Working - Cannot Stop Heating; Cannot Stop Heating Troubleshooting Methods

2. Cannot stop heating trouble shooting method：
See figure 29, the “BCR5PM”controlled silicon which control heater fuse on-off breakdown, or the front “3150”optocoupler、
“8650”patch triode which control signal are damaged. It will cause can’t stop power supply. Repair or replace mainboard.
Figure 29 Circuit and picture of back heat function
SMD transistor 8050
Thermotherapy output CON05
AC24V output CON06
Silicon controlled BCR5PM
Optocoupler 3023