It is a TL-WR1043ND with +12 V supply. Inside are 3 voltages: +5 V, +3,3 V and +1,8 V. The +5 V is fine.
However, +3,3 V is no present and since +1,8 V is driven from that, there is no voltage too. I discovered there is APW7120 PWM controller running dual N-channel MOSFET 4228BGM.
Since the dual MOSFET measures OK and the PWM is hot like hell when I plug in +12 V transformer (well, there is 14,5 V when pluged in, but I think its normal for these supply transformers, right), I guess the PWM is dead…is there anything I can do for proving it before I will try to look for replacement?
However, +3,3 V is no present and since +1,8 V is driven from that, there is no voltage too. I discovered there is APW7120 PWM controller running dual N-channel MOSFET 4228BGM.
Since the dual MOSFET measures OK and the PWM is hot like hell when I plug in +12 V transformer (well, there is 14,5 V when pluged in, but I think its normal for these supply transformers, right), I guess the PWM is dead…is there anything I can do for proving it before I will try to look for replacement?
Comment