2 Broken Resistor/capacitor - Values on PCB MagSafe 45W-PA-1450 (BOM?)
Hi,
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!
893 
2.3千 
4条评论
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.
Thanks!
/l
由 Lurgaci 完成的
Sorry guy we don't try to repair them and we only have 65 Watt units
由 Dan 完成的
my name is JORGE CRUZ of the Mexico, C=74uf
由 JORGE 完成的
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!
由 Max Chernotsky 完成的