Lexmark PCBA 56P2030 is compatible in the following Printer Models:

Lexmark Mono Laser

Lexmark T620dn (4069-52N)
Lexmark T620in (4069-52N)
Lexmark T620n (4069-52N)
Lexmark T622dn (4069-72N)
Lexmark T622in (4069-72N)
Lexmark T622n (4069-72N)
Lexmark T520dn (4520-002)
Lexmark T522dn (4520-220)