Sony BX Series Assembly And Disassembly Manual page 26

1.MS-1-D.23
CPU
1)
Rotate the lock screw in a counter clockwise direction by 90 degrees,
and release the lock.
*Use a 4 mm flat-blade screwdriver.
2)
Remove the CPU vertically.
*Be careful not to bend the pins.
Confidential
CPU
BX Series