Page 130 - Electronic Mechanic - TP - Volume - 2

ELECTRONICS MECHANIC - CITS

Step 2: Read the wire map

There are two parts inside a cable to transmit data, the center core and the metallic shield.
When the cable is working well, you will see this map: 1 and 2 wire found by M (Emitter) and R (Remote) are
matched accordingly

If any of them are broken, one of the pairs will not be matched.
When both pairs are not connected, the insulator between them is damaged. This leads to a short circuit inside
the cable. Data is forced to stop at the short point.

To test multiple cables, unplug the current cable and insert a new one. Run the CONT test.

Additional: Trace the coaxial cable with NF-858C
When you can’t find the other end of a coaxial cable, NF-858C helps locate it.
Connect one end of the coaxial cable to the Emitter’s BNC connecter. Use the Right/Down button to select the
Scan mode. Press OK to confirm.
The Emitter will start to send digital signals to the cable.
Take out the Receiver device. Tap the probe to other coaxial cables in the room or another room.
The Receiver has a tone generator. When it detects the signals, it beeps.

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CITS : E & H - Electronics Mechanic - Exercise 151