Icom IC-9700 Instruction Manual basic - Page 81

MAINTENANCE 10 Troubleshooting The following chart is designed to help you solve problems that are not equipment malfunctions. If you are unable to locate the cause of a problem, or solve it through the use of this chart, contact your nearest Icom Dealer or Service Center. PROBLEM Power does not turn ON when POWER is pushed. No sound is heard from the speaker. Sensitivity is too low, and only strong signals are heard. The transceiver automatically switches to transmit while receiving. No power output or the output power is too low. Transmit signal is unclear or distorted in the SSB mode. Received audio in the SSB mode is unclear or distorted. POSSIBLE CAUSE SOLUTION REF. The power cable is not connected properly. Reconnect the DC power cable properly. p. 2-1 The external power supply is turned OFF. Turn ON the external power supply. The DC power cable fuses or circuitry fuse are blown. Find and repair the cause of the problem, p. 10-1 and then replace the damaged fuse with a new one. The function that mutes the received audio of the SUB band is turned ON. Turn OFF the Sub Band Mute function. p. 8-2 The audio level is too low. Rotate AF RF/SQL (inner) clockwise to obtain a suitable listening level. p. 3-1 The squelch is closed. Rotate AF RF/SQL (outer) to the 12 o'clock position to open the squelch. Headphones are connected. Disconnect the headphones. p. 1-1 In the FM mode, the Tone Squelch function is turned ON. Turn OFF the Tone Squelch function. - The attenuator is activated. Turn OFF the attenuator. p. 4-1 RF gain control is activated. ( is displayed.) Set the RF gain higher until RFG just goes off. ( disappears.) p. 3-10 The antenna is defective or the coaxial Repair the problem and then reconnect p. 13-3 cable is defective. the antenna. You are using an antenna that is not Connect an antenna suitable for the suitable for the band you have selected. operating band. The squelch is closed. Rotate AF RF/SQL (outer) to the 12 o'clock position to open the squelch. p. 3-10 The VOX function is ON. Push VOX/BK-IN to turn OFF the VOX - function. The VOX gain is set too high. Adjust the VOX gain. The transmit output power is set too low. Adjust the RF POWER in the Multifunction menu. p. 3-10 The modulation input signal level is set Adjust the microphone gain in Multi- too low. function menu. p. 3-11 The output power is limited because of power amplifier protection. Stop transmitting, and then wait without turning off the transceiver until the temperature of the power amplifier FET drops sufficiently. p. 3-10 The microphone is bad, or the [MIC] connector is shorted or defective. Test the microphone and check the [MIC] p. 13-3 connector. The antenna SWR is more than 3:1. Adjust the antenna for an SWR of less than 3:1. p. 3-11 The transceiver's microphone gain is too Adjust the MIC GAIN level so that the high. meter reading swings between 30 and The desktop microphone gain is too high. 50% of the ALC scale. p. 3-11 The incorrect sideband is selected. Toggle between USB and LSB. p. 3-3 The PBT function is activated. Hold down MULTI , and then set to clear. p. 4-3 10-6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21