(Topic ID: 235063)

What is the usage of the LS273 on a CPU board ?


By jimy_speedt

9 months ago



Topic Stats

  • 4 posts
  • 2 Pinsiders participating
  • Latest reply 9 months ago by jimy_speedt
  • No one calls this topic a favorite

You

Linked Games

You're currently viewing posts by Pinsider jimy_speedt.
Click here to go back to viewing the entire thread.

#1 9 months ago

Hi,

In the context of a coil activation failure, I need to check if the LS273 on the CPU board of a Last Action Hero is ok. I checked all downward components.

Therefore I would appreciate in this context to know what the input, output, clear and clock represent, in simple words if possible

Thank you in advance

#4 9 months ago

It is clear, or near to, thanks a lot.

Just one thing. What do you mean by a stable state of the input ?

If we go a bit further than the theory, how can we apply this to the present case ? What should be the input, what is the role of the clock, to get a "1" at the output ? More clearly, why did they put a D flip flop at this place of the circuit ? For this coil 4L (Q43), from which output does the input of the LS273 come ?

Is it only a hardware which ensure the signal is good before passing it further or is there any logic in there ?

Promoted items from the Pinside Marketplace
$ 229.99
$ 30.00
Electronics
Yorktown Parts and Equip
$ 10.00
Cabinet - Sound/Speakers
Gweem's Mods
From: $ 40.00
Cabinet - Other
Rock Custom Pinball
From: $ 40.00
Lighting - Interactive
Professor Pinball
$ 40.00
Playfield - Decals
Great American Pinball
$ 40.00
Lighting - Other
Rock Custom Pinball
From: $ 18.00
Apparel - Men
Pinside Shop
From: $ 369.95
Boards
PinSound
From: $ 9.99
From: $ 16.95
$ 14.50
Electronics
PinballElectronics.com

You're currently viewing posts by Pinsider jimy_speedt.
Click here to go back to viewing the entire thread.

Hey there! Got a moment?

Great to see you're enjoying Pinside! Did you know Pinside is able to run thanks to donations from our visitors? Please donate to Pinside, support the site and get anext to your username to show for it! Donate to Pinside