Re: Dell 3008wfp faulty power supply
The 12v, 18v and 25V rails are not likely to be active when the monitor is in standby. I assume the "Good" voltages you posted are from a running (not in standby) monitor.
Since there's no schematic, I looked at the photos posted earlier. (If you can post photos of your own boards, top and bottom, with heatsink tops of PSU removed so we can see where things go...)
I'm thinking P801 is main 5v Standby and 18v supply to the logic board
P802 is 12v as well as control signals from mainboard to tell PSU to start up etc
P803 is inverter power (25v) and also power up\DIM signal etc.
Looking at the voltages, some things seem off.
P802 Pins 7 and 9. I guess one of these is PS_ON and the other maybe inverter control passthrough from the mainboard, unless inverter has its own separate control wiring (please check)
P802 Pin 10 is strange. Need to know the function of that pin. Looks like it's driven from 5v Standby rail via Q19.
P803 Pin 13 might just be different because the monitor is not running. Hard to say.
I've added labels and pin numbers to the photo, can you confirm these are correct?
The 12v, 18v and 25V rails are not likely to be active when the monitor is in standby. I assume the "Good" voltages you posted are from a running (not in standby) monitor.
Since there's no schematic, I looked at the photos posted earlier. (If you can post photos of your own boards, top and bottom, with heatsink tops of PSU removed so we can see where things go...)
I'm thinking P801 is main 5v Standby and 18v supply to the logic board
P802 is 12v as well as control signals from mainboard to tell PSU to start up etc
P803 is inverter power (25v) and also power up\DIM signal etc.
Looking at the voltages, some things seem off.
P802 Pins 7 and 9. I guess one of these is PS_ON and the other maybe inverter control passthrough from the mainboard, unless inverter has its own separate control wiring (please check)
P802 Pin 10 is strange. Need to know the function of that pin. Looks like it's driven from 5v Standby rail via Q19.
P803 Pin 13 might just be different because the monitor is not running. Hard to say.
I've added labels and pin numbers to the photo, can you confirm these are correct?
Comment