1, 3.4V
2, 2.61V
3, 0.02V
4、0 v
5, 0.06V
6, 17.6V
7,121.6 V
The on-off failure of Konka 6755 power supply is caused by power protection, and the protection circuit of secondary optocoupler to pin 1 can be disconnected to determine.
The power supply chip FAN6755's ① pin starting voltage is 1.5V-3.5V, ② pin (FB) 4.0V, ③ pin (current detection) 0V, ④ pin, ⑤ pin (pulse output) 0V, ⑥ pin (power supply) 4.0V-13V fluctuation, ⑧ pin (HV) 310V, replacing multiple FAN6755 faults unchanged. Take off the FAN6755 from a normal TV and replace it, the fault phenomenon remains unchanged, and confirm that the power IC is not wrong