The part number is located along the top edge of the Mother Board
System 10, 11, 15A
Part number is at the top left corner of the master pcb
Series 16A/B/C, 18A/B/C, 21A/B
Part number is located along the right hand side of the plastic chasiss. Or main board numbers on the bottom at the front./
Series 16i, 18i, 21i controls.
The part number is located on the plastic cover on the back of the LCD/MDI. If standalone then same as 16/18/21 control
Series 0i Model B/C
Similar to the 16/18/21i controls.
PCB Printed Circuit Boards
For PCBs that mount to a master PCB or backplane PCB, the part number will often be on a white barcode sticker. This is stuck to the top of a yellow plastic frame on the PCB.
If the prefix is A320 or A350 then the number will be on the other side of the PCB.
Power Supply Units & I/P Units
Modular PSU’s had part numbers on the bottom of the front panel. Black PSU’s on the side. Metal on tags on the mounting plate.