IBM AN/FSQ-7
A panel from the FSQ-7 appears in the Strategic Air Command.
This is exactly where you would expect to see the FSQ-7, but it would have been retired long before 1990.
Russian dissidents steal a nuclear missile and launch it from NATO-aligned Turkey into Russia, sparking an automatic Russian response against the USA. Realising their mistake the Russian premiere contacts the US President and together they try to prevent all-out nuclear war.
A panel from the FSQ-7 appears in the Strategic Air Command.
This is exactly where you would expect to see the FSQ-7, but it would have been retired long before 1990.