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Electronics- Logic Probe
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Logic Probe is one of the basic troubleshooting tools for common electronic logic circuits (TTL circuits). Almost all video game circuit boards are built using TTL chips. These chips will occasionally fail and the Logic Probe is a tool that affords us a look into what may be failing, and it¡¦s a ve ....
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....er test.
2. Connect black lead to ground of circuit under test.
3. Touch probe tip to point in digital circuit to be tested.
4. One or the other LED indicator should light. If both light, the tip is disconnected from the circuit or the point is in the undefined region between HIGH and LOW.
Note that the voltage range between +0.8V and +2.4V is undefined. Any steady voltage state in this undefined range should light both LED's on the logic probe & is indicative of a problem such as overload.... |
| Number of words: 428 |
Approximate pages: 2 |
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