IC-PS15 AC Power Supply

Introduction

Thank you for choosing the IC-PS15 Power Supply, designed for ICOM's transceivers. This AC power supply is a newly developed power source specifically for ICOM's Digital, All Solid-State, All Band, HF Transceiver, 100W continuous output, with a General Coverage Receiver, the IC-720.

Specifications

• Number of Semiconductors: Transistors: 4, Diodes: 7
• Input Voltage: 100V, 117V, 200V, 240V, AC (50/60HZ) ±10%
• Input Capacity: 550VA, at 20A load
• Output Voltage: 13.8V DC, negative ground
• Max. Load Current: 20A, 10 minutes on, 10 minutes off, 50% duty cycle
• Dimensions: 110(H) x 180(W) x 290(D) mm.
• Weight: Approximately 8.2 kgs.
• Accessories supplied: 2 spare fuses, Instruction Manual

Before Use

This is a regulated power supply with an output of 13.8V DC, 20A, for use with ICOM's IC-720, with continuous RF output of 100W, or other matching transceivers.

The IC-PS15 has complete safeguards against increased ripple in the output voltage caused by lower input voltage, fluctuation of output voltage caused by ambient temperature change, and breakdown of transistors caused by high current at output terminals.

This power supply is designed to be turned on/off by the power switch on the transceiver. There is no power switch on the IC-PS15. This unit supplies a maximum of 20A at 13.8V DC; avoid using this unit with sets other than ICOM's matching transceivers, even for experiments.

A cooling fan, IC-CF1, with mounting hardware, is available as an option. Its use is recommended when the IC-720 is operated in the RTTY mode, or the power supply heats up due to ambient temperatures.

How to Use

Connect the DC OUTPUT plug of the IC-PS15 to the power connector of the IC-720, or other ICOM's matching transceiver, firmly. Ensure the following:

1. The power switch of the transceiver is OFF.
2. The T/R switch is in the RECEIVE position.
3. No microphone is connected to the transceiver.

Connect the AC POWER cord to a power outlet. When the power switch of the transceiver is turned on, the IC-PS15 will be turned ON, and the power indicator LED will light. For further operating information, refer to the Instruction Manual of the transceiver.

Connection Diagram Description: The diagram shows the IC-PS15 connected to the IC-720 via the DC OUTPUT plug. The IC-PS15 is then connected to an AC power outlet via its AC POWER CORD.

Functions

POWER DISPLAY LED: Illuminates when power is on. No power switch is installed on the IC-PS15. ON/OFF is controlled by the POWER SWITCH of the transceiver.

GND TERMINAL: Ground this terminal with the shortest possible wire for shock protection or other mishap.

FUSE HOLDER: Fuse holder for the AC power line. If blown, replace it with a 10A (at 117V) or 5A (at 240V) fuse after checking the cause of the problem. Use a Philips screwdriver to open the holder. The outside ring of the holder is fixed.

DC OUTPUT PLUG: 13.8V DC is available at up to 20A. Connect this plug to the power connector of the transceiver.

AC POWER CORD: Connect the plug to a power outlet.

Technical Diagrams and Components

The document includes technical diagrams illustrating the internal workings of the power supply:

Schematic Diagram

Presents a detailed electrical schematic of the power supply's circuitry, showing transformers, rectifiers, filters, voltage regulators, and other electronic components.

Block Diagram

Illustrates the functional flow of the power supply, depicting stages such as AC input, voltage conversion, rectification and filtering, voltage control, and DC output.

Components Used in Power Circuit

A table listing the specific components used in the power circuit, including their part numbers, types, and operational roles. Key components listed are transistors (Q1, Q2, Q3, Q4), diodes (D1-D7), fuses (F1, F2), capacitors (C1-C12), resistors (R1-R11), and integrated circuits (U05, XZ-051).