Power Supply; High-Efficiency Large-Capacity Power Supply Implemented; Power Saving; Safety - Kenwood TS-990S In-Depth Manual

Hide thumbs Also See for TS-990S:

Table of Contents

04 TRANSMISSION

Power Supply

In the TS‑990S, a large‑capacity current‑resonance‑type switching power supply unit is implemented for stable 200 W

transmit power operation.

In comparison with conventional transformer types, its load efficiency is higher (83% typical on AC 100 V 200 W

transmission) with less heating and less power consumption.

The TS‑990S has another power supply circuit dedicated for the main microprocessor, which is different from those

sourced for the TX/RX. In low power consumption mode, the standby power is secured to 0.5 W or less. This conforms to

international energy regulations.

The TS‑990S conforms to international safety standards and provides the following protection functions for safety

operation.

● Overcurrent Protection

All power supply output currents are subject to monitoring, and if an overcurrent is detected, intermittent output begins to

drop the output voltage.

● Thermal Protection

The temperature in the power supply unit is subject to regular monitoring. When the temperature rises excessively,

transmission stops, and if the temperature rises more, the power supply shuts down to secure the safety operation.

Fig. 43 High‑Efficiency Large‑Capacity Power Supply

Table of Contents