Kenwood TS-990S Operation Manual - Page 285

TROUBLESHOOTING 18 TROUBLESHOOTING Prior to requesting after-sales service, read through the following list to troubleshoot common problems. SYMPTOMS ENCOUNTERED DURING RECEPTION AND TRANSMISSION Symptom Common Problem What to do Ref. Page Screens do not appear correctly during power A microprocessor is erroneously active. Reset the transceiver. up ( ). {page 16-4} Cannot receive even if the antenna is The Squelch is open. Adjust the SQL control. If the transceiver is connected to the transceiver. used with a TNC, be sure the DCD LED on the {page 4-8} The RX sensitivity is low. TNC does not light. The attenuator is active. Disable the attenuator. {page 6-1} The preamplifier is active. Disable the preamplifier. {page 5-9} Wrong antenna was selected. The RX ANT is active. Reselect the antenna. Be sure that the RX ANT is inactive. {page 4-23} Cannot tune even if the antenna tuner is Press and hold [AT/TUNE] to tune. Or, stop active. the antenna tuning. {page 4-24} The gain was reduced by the RF control. Rotate the RF control fully clockwise. {page 4-8} The center frequency of the preselector Reset the center frequency of the preselector is deviated. to default. {page 6-1} Configuration for the transverter is Be sure that the transverter is correctly incorrect. configured (if the transverter is active), and is {page16-33} properly working. The transverter is active. If the transverter is active, be sure that the transverter is working properly. {page 16-33} An additional filter has been enabled Review the configuration for the additional even though an additional filter is not filter. {page 16-22} installed onto the transceiver. The bandwidth for the preselector is deviated. Readjust the preselector (main band only). {page 6-1} The received signal cannot correctly be demodulated. The selected operating mode is inappropriate. Select another operating mode. {page 4-10} The AGC function was configured inappropriately. Configure the AGC function again. {page 5-4} The frequency cannot be changed even with The RIT/XIT function is active. a rotation of the RIT or XIT control. Press [RIT] or [XIT]. {page 5-13} The treble and bass of the received audio in Configurations for the RX DSP filter do Change the configurations. SSB mode are excessively filtered. not match the operating environment. {page 6-2} The audio is distorted. The AGC function is active. Enable the AGC function, or adjust the RF gain with the RF control. {page 5-4} The audio level is high due to the position of the AF control. Rotate the AF control to adjust the volume level. {page 4-7} No audio sounds from the speaker. The AF control is excessively rotated counterclockwise. Rotate the AF control clockwise. {page 4-7} The SQL control is excessively rotated Rotate the SQL control counterclockwise. clockwise. {page 4-8} A set of headphones is connected. Disconnect the headphones. {page 1-2} CTCSS tone is enabled in FM mode. Deactivate CTCSS {page 5-34} The audio line is muted. Unmute the audio line. {page 4-7} An external speaker is not correctly Disconnect the external speaker, or review connected nor configured. the connection to and configuration for the {page 1-3} external speaker. With stereo headphones, the audio sounds In Menu 1-07, configuration for the Review the configuration for Menu 1-07. from one channel. mixing balance specifies only one {page 4-26} channel. In FM mode, the performance of the S meter Sensitivity of the S meter is low. is dull. Select "High" for the S meter sensitivity in Menu 0-08. {page 5-33} Contents Index 18-7