Symptom | Cause | Solution |
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Unit does not produce sound. | • Power switch not in on position. | • Move power switch to on position. |
Power led does not light. | • Power cable not connected to amplifier or to outlet. | • Connect power cable to ac supply. |
| • AC outlet not active. | • Check condition of outlet. |
| • Main amplifier fuse defective. | • Replace amplifier main power fuse on rear panel with correct type and rating. |
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| • If the fuse blows a second time discontinue use and contact a qualified customer service technician |
Power led lights, but no sound | • No input source signal. | • Check for proper function of input source device. |
is produced by the amplifier. | • Input source not connected. | • Check input cables and connections. Replace questionable cables with known good cables. |
| • Input connecting cable defective. | • Check speaker cables and connections. Replace questionable cables with known good cables. |
| • Speaker(s) not connected. | • Check operating condition and status of speaker system(s). |
| • Speaker cable defective. | • Be sure the level controls are properly set. |
| • Speaker system(s) inoperative. |
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| • Amplifier’s level controls are set to zero. |
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Sound is present but volume | • Amplifier input level controls are set too low. | • Adjust level controls as per instructions. |
is too low even though source | • Wrong pin connections in cables. | • Use correct cables (as shown on back of unit). |
device is set to a high level. |
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Loud 60 cycle hum is heard at | • Improper or defective ground connection at inputs. | • Check for proper ac line ground on power amp and all input devices. |
all times through the speaker | • Improper or defective ground at input source device(s). | • Check input cables for all source devices and signal processing as well as input cables to power |
systems. | • Improper or defective ground connection on ac outlet. | amplifier. Check position of ground lift switch as per instructions for lifting the ground. |
| • Ground loop through ac line connection/ rack mounting. | • Never lift the AC line ground on the power amplifier. If you are not totally familiar with ground lift- |
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| ing or unification procedures, do not attempt them without first consulting your dealer or a qualified |
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| sound technician for more Information on grounding. Improperly done, such procedures can pose a |
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| safety and/or fire hazard. |
Sound is distorted. | • Distortion occurring in source device. | • Check clip indicators on input source devices and reset levels if necessary to eliminate distortion. |
| • Input level is set too high. | • Adjust level controls as per instructions. |
Protect led remains lit or goes | • Unit is operating at excessively high temperature. | • Check that amplifier is adequately ventilated on the front and rear panels where the air vents and |
on and off intermittently after | • Extremely low speaker impedance. | fans are located. If overheated, let the amplifier cool down before applying an input signal. |
using amplifier for a short | • Short in speaker connectors, speaker cable or speaker | • Check the position of operation mode switch. Be sure that the speaker connections are made in |
time. | system. | accordance with the switch setting. |
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| • Verify speaker system impedances. Be sure the total speaker system impedance is at least 2 ohms |
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| per channel when the operation mode switch is in the stereo position. If the switch is in the bridge |
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| mode, the impedance must be at least 4 ohms. If you are not sure of your total speaker impedance |
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| load, contact your dealer for more information. |
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| • Check condition of speaker cables. |
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| • If using bare wire connections on the outputs of the amplifier, be sure that no strands from one con- |
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| nector are touching any other connector. |
Fuse blows intermittently. | • Speaker load impedance is too low. | • Check for shorts on the outputs. |
| • Type or rating of the fuse is not correct. | • Check your speaker impedance (info from dealer). |
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| • Check that the fuse type and rating is correct. |
Protect led(s) stay on with no | • Failed amplifier. | • Contact the gemini customer service department or your authorized dealer to speak to a qualified |
speakers connected and with |
| service technician. |
the amplifier cooled down. |
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Power led lights but there is no sound from one or both channels.
•Secondary DC fuses are blown (on either one or both channels) indicating failed a failed channel or channels.
•If only one channel fails, the second may still operate, but the unit should be serviced as soon as possible. Contact the Gemini service department or your authorized dealer to speak to a qualified customer service technician.
Troubleshooting 16
Solución de problemas • Dysfonctionnements • Fehlerbeseitigung
