Exbom 7897575141787
Exbom RJ45 and RJ11 Cable Tester User Manual
Model: 7897575141787 | Brand: Exbom
1. Introduction
The Exbom RJ45 and RJ11 Cable Tester is a versatile electronic device designed for quick and easy verification of network cable continuity, open circuits, short circuits, straight-through connections, and crossed wires. It is an essential tool for professionals and enthusiasts working with network installations, allowing for testing of installed cables or pre-installation checks. This tester offers intuitive operation and high precision, utilizing LED indicators to display the internal wiring status and identify potential issues.
2. Key Features
- Electronic tester for RJ-45 and RJ-11 network cables.
- Verifies correct cable connections and wire polarization.
- Features an ON/OFF switch.
- Requires a 9V battery (not included) for power.
- Tests continuity for pins 1, 2, 3, 4, 5, 6, 7, 8, and G (ground).
- Detects swapped connections, open circuits, short circuits, and crossed wires.
- Portable equipment with LED indicators.
- Detachable unit for testing extensive wiring.
3. Product Overview





4. Setup Guide
4.1. Power Supply
The tester requires a 9V battery (not included) for operation. Locate the battery compartment, typically on the back of the main unit, and insert a fresh 9V battery, ensuring correct polarity. Secure the battery compartment cover.
4.2. Initial Inspection
Before first use, ensure the device is clean and free from visible damage. Confirm that the ON/OFF switch operates smoothly and that the RJ45 and RJ11 ports are clear of obstructions.
5. Operating Instructions
5.1. Basic Cable Testing (RJ45/RJ11)
- Ensure the tester is powered off.
- Connect one end of the network cable (RJ45 or RJ11) to the 'MASTER' unit's corresponding port.
- Connect the other end of the cable to the 'REMOTE' unit's corresponding port.
- Slide the power switch to the 'ON' position.
- Observe the LED indicators on both the MASTER and REMOTE units.
5.2. Interpreting LED Indicators
- LEDs illuminate sequentially from 1 to 8 (and G for ground) on both units.
- Correct Wiring: LEDs on both units light up in the same sequence (e.g., MASTER 1 lights up with REMOTE 1, MASTER 2 with REMOTE 2, etc.).
- Open Circuit: An LED on either unit fails to light up for a specific pin, indicating a break in that wire.
- Short Circuit: Multiple LEDs light up simultaneously or in an incorrect sequence, indicating wires are touching.
- Crossed Wires: LEDs light up in a different sequence (e.g., MASTER 1 lights up with REMOTE 2, MASTER 2 with REMOTE 1), indicating wires are swapped.
5.3. Testing Long Cables (Detachable Unit)
For cables already installed or too long to bring both ends together, detach the REMOTE unit from the MASTER unit. Connect one end of the cable to the MASTER unit and the other end to the REMOTE unit at the distant location. Proceed with testing as described in section 5.1.
6. Maintenance
- Cleaning: Wipe the device with a soft, dry cloth. Do not use abrasive cleaners or solvents.
- Storage: Store the tester in a cool, dry place, away from direct sunlight and extreme temperatures. If storing for extended periods, remove the 9V battery to prevent leakage.
- Battery Replacement: When the LED indicators become dim or the device fails to power on, replace the 9V battery.
7. Troubleshooting
| Issue | Possible Cause | Solution |
|---|---|---|
| Tester does not power on | No battery or dead battery | Insert a fresh 9V battery. |
| LEDs do not light up or are dim | Low battery | Replace the 9V battery. |
| Incorrect LED sequence | Cable fault (open, short, crossed) | Inspect the cable for damage. Re-crimp connectors if necessary. Replace the cable if severely damaged. |
| Remote unit not responding | Poor connection or faulty remote unit | Ensure the cable is fully inserted into both units. Test with a known good cable. |
8. Technical Specifications
| Feature | Specification |
|---|---|
| Manufacturer | Exbom |
| Model Number | 7897575141787 |
| Color | White |
| Power Source | 9V Battery (not included) |
| Compatible Connectors | RJ-11, RJ-45 |
| Approximate Package Dimensions (L x W x H) | 17.5 x 11.1 x 3.7 cm |
| Approximate Weight | 140 g |
| ASIN | B07MD9383D |
| EAN | 7897575141787 |
| Available Since | December 25, 2018 |
9. Warranty and Support
For warranty information and technical support, please refer to the documentation provided with your purchase or contact Exbom customer service directly. Keep your proof of purchase for any warranty claims.
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