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Cannot load symbol

JoNie

Hello,

i completed a schematic design in OrCad Capture and i wanted to create a new layout of the circuit at pcb editor. My circuit consists of some capacitors,resistors,inductors and the IRF150 transistor.The problem is that all components can be placed at the design in pcb editor except for the IRF150 and when i try to place it command window gives the message : " Cannot load symbol '806' ". Could anyone help on this?

Thank you.

  • steve

    Look at the PCB Footprint property for this part. It looks like you have called this 806 and a footprint of that name doesn't exist in the required directories. An IRF150 would typically be a TO204AE and a footprint of this name does exist in the default library C:\Cadence\SPB_17.4\share\pcb\pcb_lib\symbols folder. Try changing the footprint to that or the part you actually want to use.

  • JoNie
    in reply to steve

    I tried what you said. I changed the part to the one with pcb footprint TO204AE but again it shows up the message : Cannot load symbol 'TO-204AE'. I checked the default librabry you mentioned and the name exists in there.

  • steve
    in reply to JoNie

    You have to make sure that the footprint name you type matches the footprint name in the directory. You've typed TO-204AE and it should be TO204AE.

  • JoNie
    in reply to steve

    I changed the name manually for the propery editor but now the message at pcb editor is : (SPMHGE-82): Pin numbers do not match between symbol and component. Run dev_check on device file for more information.

  • steve
    in reply to JoNie

    So the PCB Footprint has 4 pins, what does your schematic symbol have? If these don't match you'll get the error. Try opening the PCB Footprint and you'll see 2 pins for the can connection (pins 3 and 4). If your schematic symbol only has 3 pins add a new property called NC with a value of the non connect pins (4). Try watching this video OrCAD Simple PCB Design Tutorial 17.4 - YouTube which goes through a simple flow (and shows the property being added).

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