TekPower TP50SW 50 Amp 13.8V Analog DC Power Supply User Manual

Introduction

This manual provides detailed instructions for the safe and efficient operation of your TekPower TP50SW 50 Amp 13.8V Analog DC Power Supply. The TP50SW is designed to provide stable DC power for various applications, including Ham and CB radio equipment. It features a highly stable, fused, analog switching power supply with both fixed 13.8V and adjustable 9-15V DC output, capable of delivering up to 50A maximum current. Please read this manual thoroughly before using the device to ensure proper functionality and longevity.

Safety Precautions

To prevent electric shock, fire, or damage to the unit, please observe the following safety guidelines:

• Power Source: Ensure the input power matches the specified 110V AC 60Hz. Connecting to an incorrect voltage may damage the unit.
• Ventilation: Do not block ventilation openings. Adequate airflow is essential to prevent overheating. Maintain at least 4 inches (10 cm) of space around the unit.
• Environment: Operate the power supply in a dry, well-ventilated area. Avoid exposure to moisture, rain, or excessive humidity. Do not operate near flammable materials or in explosive atmospheres.
• Overload Protection: The unit is equipped with overload and short circuit protection. Do not exceed the maximum output current of 50A. If the protection circuit activates, disconnect the load and reduce the current demand before restarting.
• Fuse: The power supply contains an internal fuse (110V, 15A). If the unit fails to power on, check and replace the fuse with one of the same type and rating. Always disconnect the power cord before replacing the fuse.
• Connections: Ensure all DC output connections are secure and correctly polarized (+ to +, - to -) before applying power. Loose connections can cause arcing and damage.
• Servicing: Do not attempt to open or service the unit yourself. Refer all servicing to qualified service personnel. Opening the casing voids the warranty.

Product Overview

Controls and Connectors

Familiarize yourself with the various controls and connection points on your TP50SW power supply.

Figure 1: Front panel of the TekPower TP50SW power supply, showing the analog meter, control knobs, power switch, and cigarette plug output.

• Analog Meter: Displays either output voltage (V) or current (A), selectable via the Meter switch.
• Meter Switch: Toggles the analog meter display between Voltage (V) and Amperage (A).
• Power LED: Illuminates when the unit is powered on.
• Voltage Adjust Knob: Allows fine-tuning of the output voltage when the Voltage switch is set to 'ADJ'.
• Noise Offset Knob: Used to adjust or minimize switching noise, particularly useful for sensitive communication equipment.
• Power ON/OFF Switch: Toggles the main power to the unit.
• Cigarette Plug (DC Output): Provides a convenient 12V DC output for accessories with a cigarette lighter plug. Limited to 10A.
• Meter Adjust: A small adjustment point, typically for calibrating the analog meter.
• Voltage Switch (13.8V/ADJ): Selects between a fixed 13.8V output or an adjustable output range of 9-15V (controlled by the Voltage Adjust knob).

Figure 2: Rear panel of the TekPower TP50SW power supply, showing the main DC output terminals, AC input, and cooling fan.

• Main DC Output Terminals: Heavy-duty binding posts for connecting high-current devices. Red is positive (+), Black is negative (-). Max 50A.
• AC Input Socket: For connecting the supplied power cord to a 110V AC 60Hz wall outlet.
• Fuse Holder: Contains the main AC input fuse.
• Cooling Fan: Automatically operates to maintain optimal internal temperature.

Key Features

• High Stable 13.8V DC Power Supply for Ham/CB Radio applications.
• 50A Max Current Output for demanding loads.
• Adjustable DC output from 9-15V for versatile use.
• Convenient Cigarette Plug output for automotive accessories.
• Equipped with overload and short circuit protection for enhanced safety.
• Low ripple and noise, suitable for sensitive communication equipment.

Setup

1. Unpacking: Carefully remove the power supply from its packaging. Inspect the unit for any signs of damage during transit.
2. Placement: Place the power supply on a stable, flat surface. Ensure there is ample space (at least 4 inches or 10 cm) around all sides, especially the rear fan and side vents, for proper ventilation. Avoid placing it near heat sources or in direct sunlight.
3. AC Power Connection:
   • Ensure the power supply's ON/OFF switch is in the 'OFF' position.
   • Connect the supplied AC power cord to the AC input socket on the rear panel of the power supply.
   • Plug the other end of the AC power cord into a standard 110V AC 60Hz wall outlet.
4. DC Load Connection:
   • Main Output Terminals: For high-current devices, connect the positive (+) lead of your device to the red terminal and the negative (-) lead to the black terminal on the rear panel. Ensure connections are tight and secure.
   • Cigarette Plug Output: For devices requiring a cigarette lighter connection, insert the device's plug into the cigarette plug socket on the front panel. Note the 10A current limit for this output.
   • Always double-check polarity before powering on the unit to prevent damage to your connected equipment.

Operating Instructions

1. Powering On:
   • After all connections are made, switch the Power ON/OFF switch to the 'ON' position. The Power LED will illuminate.
2. Selecting Output Voltage:
   • Use the Voltage Switch (13.8V/ADJ) on the front panel:
   • Set to '13.8V' for a fixed 13.8V DC output.
   • Set to 'ADJ' to enable the Voltage Adjust Knob, allowing you to vary the output voltage between 9V and 15V. Turn the knob clockwise to increase voltage and counter-clockwise to decrease it.
3. Monitoring Output:
   • Use the Meter Switch to select what the analog meter displays:
   • Set to 'V' to display the output voltage.
   • Set to 'A' to display the output current (amperage).
4. Using the Noise Offset Function:
   • The Noise Offset Knob can be used to shift the switching frequency of the power supply to avoid interference with sensitive radio equipment. If you experience noise on your radio, slowly adjust this knob to find a setting that minimizes or eliminates the interference.
5. Powering Off:
   • Before disconnecting any load, switch the Power ON/OFF switch to the 'OFF' position.
   • Unplug the AC power cord from the wall outlet if the unit will not be used for an extended period.

Maintenance

• Cleaning: Keep the unit clean by wiping it with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure ventilation openings are free from dust and debris.
• Ventilation: Regularly check that the cooling fan and vents are not obstructed. Proper airflow is crucial for the longevity of the power supply.
• Fuse Replacement: If the power supply does not turn on, the internal fuse may need replacement.
  1. Disconnect the AC power cord from the wall outlet.
  2. Locate the fuse holder on the rear panel.
  3. Carefully remove the fuse holder cap and extract the old fuse.
  4. Replace it with a new fuse of the exact same rating (110V, 15A). Using an incorrect fuse can cause damage or fire.
  5. Securely replace the fuse holder cap.
• Storage: When storing the unit for extended periods, ensure it is in a cool, dry place, away from direct sunlight and extreme temperatures.

Troubleshooting

Specifications

Warranty and Support

The TekPower TP50SW power supply comes with a 1 Year USA warranty. This warranty covers defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.

For technical support, warranty service, or inquiries, please contact TekPower customer service. Do not attempt to repair the unit yourself, as this may void your warranty and pose safety risks.

For more information, you may visit the official TekPower website or contact their authorized service centers.