Hi
I need a schematic for this unit to help understand where the problem is occurring. Particularly helpful would be the power supply schematic.
We got this Insignia NS-32LCD in with a slow turn on complaint. We noticed that the 5 volt supply and 12 volt supply are good... The 24 volt supply to the inverter pulsated between 22 volt to 24 volt. We removed the connection to the inverter and the varying voltage still continued.
Checked all the filters and they were good, soldered up some bad solder connections on the power supply board.
I wanted to see if by removing the inverter connection from the power supply board if the 24 volt would stop pulsating over time... It took about 9 minutes and the voltage became stable... I plugged the inverter connection back into circuit and the set came on.
The pictures are posted the key pictures are of the Power Supply board.
Could the PWM chip cause this?? Any of the switching regulators??
Thank you for your help(s)
Bill
I need a schematic for this unit to help understand where the problem is occurring. Particularly helpful would be the power supply schematic.
We got this Insignia NS-32LCD in with a slow turn on complaint. We noticed that the 5 volt supply and 12 volt supply are good... The 24 volt supply to the inverter pulsated between 22 volt to 24 volt. We removed the connection to the inverter and the varying voltage still continued.
Checked all the filters and they were good, soldered up some bad solder connections on the power supply board.
I wanted to see if by removing the inverter connection from the power supply board if the 24 volt would stop pulsating over time... It took about 9 minutes and the voltage became stable... I plugged the inverter connection back into circuit and the set came on.
The pictures are posted the key pictures are of the Power Supply board.
Could the PWM chip cause this?? Any of the switching regulators??
Thank you for your help(s)
Bill
Attached Files
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