Broken Resistor/capacitor - Values on PCB MagSafe 45W-PA-1450 (BOM?)
Luis from Germany,
I'm working on a genuine Apple MagSafe 45W PA-1450 charger as it won't charge by system anymore after 4 repairs on the same cord. I have disassembled it once again, I'm getting the right voltage on the output of the PCB.
A visual inspection shows that the big resistor of the high voltage section and the capacitor next to it (see pics) where damaged.
Does any one have the teardown / BOM / PCB component values of these 2 components?
The rest of the components seem to be good. I have the time and the right tools to fix this charger: solder smd, measure (100Mhz scope/multimeter/hot-air/etc.)
Big thanks in advance!
Это хороший вопрос?
Halo Dan, thanks for your fast answer and your guidance .
I´ve experience on designing 600KHz Switching power supplys, so no problem to deal with the HF/HV.
A photo of an open charger (MAGSAFE 45W PA-1450 A1374) might work as well for me to identify the resistor / fuse, but of course somethoing more technical will be welcome.
Sorry guy we don't try to repair them and we only have 65 Watt units
my name is JORGE CRUZ of the Mexico, C=74uf
I have an alternative question: does anyone know which of the pins are for the positive or negative ends of the cable side? I took the old one’s off to replace them and now I do not know which one is which. Some help would be greatly appreciated!
из Max Chernotsky