Kenwood TS-870S User Manual - Page 78

12 MAINTENANCE No signals are received or receive sensitivity seems poor. 1 The SQL control is fully clockwise. 2 The Attenuator function is ON. 1 Turn the SQL control counterclockwise. 19 2 Press ATT [DOWN] repeatedly until the 53 Attenuator function is OFF. 3 The transceiver is in the transmit mode 3 Press [SEND] to return to the receive 23 since the [SEND] switch was pressed. mode. 4 The Microphone PTT switch is pressed. 4 Release the Microphone PTT switch. 23 5 The LO/WIDTH control or HI/SHIFT control is set incorrectly. 5 Review the sections "SLOPE TUNING", 51,52 "IF SHIFT", and "CHANGING RECEIVE BANDWIDTH". Set the controls correctly. 6 The wrong antenna connector is selected. 6 Press [ANT] to select the other antenna 63 connector. 7 If using a separate receiver that is 7 Switch ON Menu No. 53 (EXT RX). 2 connected to the EXT RX ANT connector, the connector is not enabled. 8 The Advanced Intercept Point function is 8 Press [AIP] to switch OFF the function. 53 ON. No signals are received The RF gain control is set too low. Turn the RF gain control fully clockwise. 19 or receive sensitivity seems poor; S-meter is reading full scale. Received signals are The wrong modulation mode is selected. Press [LSB/USB], [CW/-R], [FSK/-R], or 20 totally unintelligible. [FM/AM] to select the correct modulation mode. Memory Scan won't start 1 The SQL control is not set correctly. 1 Adjust the SQL control to just eliminate 19 scanning. background noise. 2 You have fewer than two memory 2 Unlock some memory channels. 62 channels that are not locked out. Memory Scan will not scan one of the stored channels; the desired channel is NOT locked out. Program Scan won't start scanning. 3 You have fewer than two memory channels programmed. 3 Store data in more memory channels. 54 With Group Scan selected, the channel you Select All-channel Scan by switching OFF 61, 62 want to scan is in a different group. Menu No. 66 (GRP.SCAN), or change to the group that contains the memory channel that you want to scan. Group changes are done by pressing Mic [UP] or [DWN]. The Start and End frequencies are identical. Store different Start and End frequencies. 58, 60 Memory Scan never Busy Frequency Stop is not activated. stops scanning even when a station is found. Switch ON Busy Frequency Stop via Menu 61 No. 67 (BSY.STOP). Program Scan never This is normal operation. stops scanning even when a station is found. Review the Scan Hold function if you want to 60 stop scanning when you hear a station while using Program Scan. You cannot transmit 1 The microphone plug is not inserted 1 Turn OFF the power, ensure the 4 even though you press completely in the Front Panel connector. microphone connector on the Front Panel [PTT], or transmissions has no foreign objects in it, then plug in result in no contacts. the microphone connector. Secure the connector with the locking ring. 2 The Transmit Inhibit function is ON. 2 Switch Menu No. 27 (TX INH) to OFF. 45 3 You have selected CW or FSK instead 3 Press [LSB/USB] or [FM/AM] to select a 20 of a voice mode. voice mode. 4 The filter for Digital operation is selected. 4 Switch Menu No. 19 (PKT.FIL) to OFF. 25 5 The wrong antenna connector (ANT 1/2) 5 Press [ANT] to select the other antenna 63 is selected. connector. Attempting to transmit 1 The antenna is not connected correctly. 1 Check the antenna connection. Correct 2 results in the "HELLO" as necessary. message appearing and 2 The antenna is not matched correctly 2 Reduce the SWR of the antenna system. 2 the Receive mode being with the transceiver. restored. 3 The input voltage is outside 13.8 V DC 3 Correct the input voltage. 3 ±15% (11.7 to 15.8 V DC). 4 An inappropriate DC power cable is 4 Use the provided or an optional DC power 3 being used. cable. 72