Kenwood TS-990S Operation Manual - Page 57

COOLING FAN AND TEMPERATURE PROTECTION FOR FINAL UNIT To protect internal circuits from high temperatures, the transceiver senses the temperature of the final unit regardless of the operation state, either transmitting or receiving, and controls the cooling fan rotation speed for the final unit and the transmit power as described below. If a thermistor detects a temperature increase in the final unit, the cooling fan at first starts rotating at low speed. If the temperature increases further, the cooling fan rotates at high speed. If excessively high temperature is detected, the transmit power is limited until the internal temperature cools down. Note: ◆◆If a message notifies you of a detected high temperature, do not shut down the transceiver with a press down of the main I/O power switch to the "O" position. ◆◆If the main power (I/O) is shut down, the cooling fan stops, and it may take longer until the transceiver cools down. BASIC OPERATIONS 4 Standard Mode Screen MAIN AND SUB SCREEN DISPLAYS In the main display, the bandscope, waterfall and audio scope in addition to the meter display can be displayed. A dial, the audio FFT scope (the bandpass spectrum frequency display) and the ∆F value can be displayed on the sub screen. ' ' MAIN SCREEN After the startup screen that appears when turning the transceiver power ( ) ON disappears, the same display was retained when the transceiver power ( ) was turned OFF last time appears. In this case, pressing [MENU] or [EXTEND] (F) while [EXTEND] (F) is in the key guide compresses the displays to be the compressed mode screen. As explained below, the function keys located below and right side of the main screen can activate key tasks and change the display for configuration. Press [ESC] while a screen is open to close the screen and revert to the normal operating screen. Compressed Mode Screen ■ Function Keys on the bottom of the Main Screen • [RX PLAY] (F1) {page 13-7} Press to open the Recording Audio Files screen. • [TX MSG] (F2) {page 13-1} Press in other than CW, FSK and PSK modes to open the Voice Message screen. • [KEYER] (F2) {page 5-22} Press in CW mode to open the CW Message screen. • [DECODE] (F3) {page 5-38} Appears while in FSK or PSK mode. This key does not appear while in other operating modes. • [TONE] (F4) {page 5-34} Appears while in FM mode. This key does not appear while in other operating modes. • [SCAN] (F5) {page 11-1} Press to start scanning. • [M V] (F6) {page 10-6} Appears while in the memory channel mode or quick memory channel mode. This key does not appear while in other operating modes. Press to activate the memory shift. • [M.LIST] (F7) {page 10-1} Press to open the Memory Channel List screen. Contents Index 4-3