CR1 Run/Check CR2 Drive 1 Check CR3 Drive 2 Check CR4 Drive 1 CR5 Drive 2

J4,7 Molex power conn J2,5 Drive controller J3,4 Drive Controller J1 40 pin floppy header 1

Drive in my toy is a WD-325M2

  The 7552 uses the same U channel drive rails that the 7568 does. The floppy mount is the same (faceplate and rails)