Kenwood TS-570D User Manual - Page 73

16 MAINTENANCE Attempting to transmit results in the "HELLO" message appearing and the receive mode being restored. The transceiver has low transmit power. VOX does not operate. Linear amplifier does not operate. You cannot access and use 10 meter band repeaters. Digital operation results in few or no connects or contacts with other stations. Attempts at controlling the transceiver by computer have failed. 1 The antenna was not connected correctly. 2 The impedances of the antenna and transceiver are not properly matched. 3 The input voltage is outside 13.8 V DC ±15% (11.7 to 15.8 V DC). 4 An inappropriate DC power cable is being used. 1 The microphone gain was set too low. 2 Poor antenna system connections are causing high SWR. The VOX gain was set too low. 1 The linear amplifier control relay is OFF. 2 The REMOTE connector wiring is wrong or faulty. 1 The repeater requires a subtone frequency for access. 2 You are not operating split frequency. 1 Physical connections between the transceiver, computer, and TNC or MCP are incorrect, or software settings in the TNC or MCP are wrong. 2 Different transmit and receive frequencies are being used. 3 The levels between the transceiver and the TNC/MCP are incorrect. 4 Your transmitted signal or the incoming receive signal is too weak. 5 The TX delay time parameter in your TNC/MCP was incorrectly set. 1 Problem with the RS-232C cable that connects the computer to the transceiver. 2 Communication parameters set in your terminal program do not match transceiver parameters. 3 The serial port on your computer is not functioning correctly. 1 Check the antenna connection. Correct as necessary. 2 Reduce the SWR of the antenna system. 3 Correct the input voltage or use a 12 to 16 V battery. 4 Use the provided or an optional DC power cable. 1 When in SSB or AM mode, increase the microphone gain. 2 Check antenna connections. Confirm that the antenna tuner is reporting a low SWR. Increase the gain via Menu No. 16. 1 Change Menu No. 39 to ON. 2 Inspect the REMOTE connector wiring and correct as necessary. 1 Review "FM REPEATER OPERATION" and select the correct frequency and type of subtone. 2 You must transmit on the repeater's input frequency and receive on the repeater's output frequency. Refer to "FM REPEATER OPERATION". 1 Re-check all connections using this manual, your TNC/MCP manual, and your computer hardware manual as references. 2 Confirm that the RIT and XIT functions are switched OFF. Confirm that you are NOT operating split frequency. 3 Adjust TX and RX levels using Menu Nos. 33 and 34, and level controls on your TNC/MCP. 4 Reorient/relocate your antenna or increase your antenna gain. 5 Set the TNC/MCP TX delay time to more than 300 ms. 1 Check the cable and cable connections. 2 Use the same parameters in the terminal program and the transceiver. Refer to "COMMUNICATION PARAMETERS". 3 Disconnect the computer from the transceiver, and run a utility program to test the computer serial port. 1 1 2 2 15 1 17 18 61 24 24 62 23,30, 32 18 - - 60 51 - 67