akshay
Newbie level 4
The data+ and data- pads had come unglued from the PCB, so I soldered them back on. But the drive doesn't work. I've checked that all IC's get ground connection. The power is a little more complicated - it goes directly to a half k-Ohm resistor or such and then to the other chips. There's either a two-terminal regulator that I can't find because it looks like a SMD capacitor, or the USB controller has a built in down-converter. There's no three terminal series regulator that I can find.
The USB chip is PHISON PS2251-50. It's rated voltage is 2.6-3.7V, but when I plug in the USB drive now I get only 1.7V max at any of its pins. No datasheet available! I wonder if it's in a low power mode or if it's busted. I can't see why it's busted. The USB drive was plugged in when the plug broke, but can the data pins breaking destroy the controller chip? That seems odd.
Any recommendations on repair? The USB stick contains near-and-dear data of a friend.:-(
The USB chip is PHISON PS2251-50. It's rated voltage is 2.6-3.7V, but when I plug in the USB drive now I get only 1.7V max at any of its pins. No datasheet available! I wonder if it's in a low power mode or if it's busted. I can't see why it's busted. The USB drive was plugged in when the plug broke, but can the data pins breaking destroy the controller chip? That seems odd.
Any recommendations on repair? The USB stick contains near-and-dear data of a friend.:-(