Yamaha GX-505 Owner's Manual - Page 43

English Appendix Troubleshooting Refer to the chart below when this system does not function properly. If the problem you are experiencing is not listed below or if the instruction below does not help, disconnect the supply lead and contact your authorized YAMAHA dealer or service center. General Problem This system does not work normally. Cause There is an influence of strong external noise (lightning, excessive static electricity, etc.) or the system was operated incorrectly. The sound suddenly goes off. The protection circuit was activated because of a short circuit, etc. The SLEEP timer was activated. No sound from speakers. Speaker connections are not secure. No sound from the external Incorrect cord connections. unit connected to this system. Input source selection is not correct. Timer cannot be set. Current time is not set. This system will not operate properly. The internal microcomputer has been frozen by an external electric shock (lightning, excessive static electricity, etc.) or power supply with low voltage. The volume level cannot be increased, or sound is distorted. The component connected to the AUX/MD terminals on the rear of the main unit is turned off. Excessive static in FM broadcasts. Interference from starting motor of nearby car. Interference from thermostat of nearby electric appliance. Noise increases during stereo Antenna input is too weak due to broadcasts. obstructions or excessive distance from broadcasting station. Stereo broadcasts are noisy Insufficient antenna input. and STEREO indicator blinks on and off. Preset stations cannot be selected. Preset memory has been erased. Buzzing or static during AM Interference from sources such as lightning, broadcasts. fluorescent lights, electric motors or thermostat of nearby electric appliance. TV or this system is being used nearby. AM broadcast sensitivity is Radio signal is weak or antenna is not poor. properly connected. What to Do Set this system to the standby mode and disconnect the AC supply lead from the AC outlet. After about 30 seconds, connect the power and operate this system again. Set this system to the standby mode, then turn on to reset the protection circuit. Cancel the SLEEP timer function. Secure the connections. Connect the cords properly. If the problem persists, the cords may be defective. Make a correct input source selection. Set current time. Unplug the AC supply lead from the wall AC outlet, then plug in again after about one minute. Turn on the power to the component. Position the FM antenna as high and as far away from nearby roads as possible. Use coaxial cable. Check antenna connections. Install a multi-element type FM antenna if possible. Install an antenna suited for the electric field strength of your area. Reprogram memory presettings. Problem is difficult to eliminate but can be lessened by grounding AM loop antenna. Move away from TV or this system. Properly connect AM loop antenna. Change orientation of AM loop antenna. Install an external AM antenna. Tuner E-33