Is it normal for PTC1 to heating up to 70 degrees in a 4-seconds, with the testers coonected to 230VAC, the switch connected to Hz(%) position and without being powered at 9Vdc? The rest of PTC2, PTC3 has 34C degree. If the switch is on Voltage(AC), PTC1 has 34C degree, PTC2, PTC3 have 34C degree & the multimeter is powered by the 9V battery. By selecting % I have the OL indication on the display without 230Vac between V-Com and with 230Vca connected to V-Com, the buzzer has a sound of BRRR... 2-3 seconds. PTC1, 2, 3 has 1.2kO, R35-1MO. R37-200O. The voltage indication AC or DC it it OK, only 220Vdc has OL indication without voltage V-Com(DC). I forgot to move the switch from Hz(%) and testers from alternating current to 230VAC. I bought another UT61E(the same) and now I have spare components.