Via detecting, image into integrated circuit IC201 (HA11440R) {12} feet voltage of 3.2 V (normal is 5.3 V), to determine whether the HA11440R performance is good, can disconnect the output of the surface acoustic filter CP201 first, then IC201 {12} feet voltage return to normal, will CP201 welding, measured its output, only 6 k Ω earth resistance and determine CP201 leakage between output terminal to ground. p3vservice manual download site
Use hair dryer blowing hot vestibule to bake for 10 minutes, CP201 resistance to restore to infinity, commissioning, troubleshooting.p3vservice manual download site