How to swap a PCB

The damaged or corrupted PCB (printed circuit board of a hard drive) can be swapped or changed with the exact same PCB from a working drive.
Simply swapping the PCB won’t work as there are some unique information matching your drive in some chips of the PCB. It is important to unsold those unique chips and move them to the new PCB as well.

Swap PCB on a Seagate drive

seagate drive pcb

For a Seagate drive here are the important information the old and new PCB need to have in common:

– The drive model number (Ex: ST3500641AS)
– The parts number (PN) (Ex:9BD148-301)
– The firmware (FW) (Ex:3.AAB)
– The number on the back of the PCB (most of time on a white sticker), composed of 9 numbers and one letter
– Ideally the production site code (Ex: AMK)

Swap PCB on a Western Digital drive

For WD drives there are 2 important information to absolutely match.

– The full drive model number (Ex:WDBFJK0040HBK)
– The number on the back of the PCB (most of time on a white sticker), composed of 13 or 14 numbers.

DCM (define the type of heads stack) isn’t necessary for a pcb swap.

Swap PCB on a Toshiba drive

pcb-toshiba-drive

For a Toshiba drive, 4 informations must match.

– The full drive model number (Ex: MK1032GAX )
– The drive number (Ex: HDD2D08 C ZK01T)
– The firmware (FW) if mentionned (Ex: 710 A0/AB211A)
– The number of the biggest square chip on the PCB (See picture below)

pcb-control-chip-toshiba