hi all,
I am trying to fix switching power supply for a sony stereo box. I generally change the whole board in TV but since this board is not available i am trying to repair it.
I have voltage coming to the main capacitor. and i have the IC ICE2QS03G is a switching IC. i want to check if it is making oscillations with my oscilloscope. i have 100w bulb in series with the main AC as a safety.
the ground pin of the IC is 8 and gate pin is 4. When i tried to touch oscilloscope ground to the IC ground i am seeing my 100w bulb glowing and i immediately took it out. i dont know what am i doing wrong. looking forward some expertise help in fixing this power supply. i am not getting standby voltage. and is this IC driving the transformer to get 13v standby. Thank you.
I am trying to fix switching power supply for a sony stereo box. I generally change the whole board in TV but since this board is not available i am trying to repair it.
I have voltage coming to the main capacitor. and i have the IC ICE2QS03G is a switching IC. i want to check if it is making oscillations with my oscilloscope. i have 100w bulb in series with the main AC as a safety.
the ground pin of the IC is 8 and gate pin is 4. When i tried to touch oscilloscope ground to the IC ground i am seeing my 100w bulb glowing and i immediately took it out. i dont know what am i doing wrong. looking forward some expertise help in fixing this power supply. i am not getting standby voltage. and is this IC driving the transformer to get 13v standby. Thank you.