Gemini GPA Serie Mode D'emploi page 6

S :
YMPTOM
1. Unit does not produce sound.
Power LED does not light.
2. Power LED lights, but no sound is
produced by the amplifier.
3. Sound is present but volume is too
low even though the source is set to a
high level.
4. Loud 50/60 Hz or 100/120 Hz hum is
heard at all times through the speaker
systems.
5. Sound is distorted.
6. Protect LED remains lit or goes on
and off intermittently after using the
amplifier for a short time.
7. The fuse blows intermittently.
8. Protect LED stays on with no speak-
ers connected and with the amplifier at
a cool temperature.
C :
AUSE
- Power button is not in 'ON' position.
- Power cable is not connected to the amplifier
or to the outlet.
- AC outlet not active.
- Main amplifier fuse defective.
- No input source signal.
- Input source not connected.
- Input connecting cable defective.
- Speaker(s) are not connected.
- Speaker cable is defective.
- Speaker system(s) are inoperative.
- Amplifier's level controls are set to 'zero'.
- Amplifier input level controls are set too low.
- Wrong pin connections in the cables.
- Improper or defective ground connection at
the inputs.
- Improper or defective ground at the input
source device(s).
- Improper or defective grtound connection on
the AC outlet.
- Ground loop through the AC line
connection/rack mounting.
- Distortion occuring in source device.
- Input level is set too high.
- Unit is operating at an excessively high temper-
ature.
- Extremely low speaker impedance.
- Short in the speaker connectors, speaker
cables, or speaker system.
- Speaker impedance is too low.
- Type or rating of fuse is not correct.
- Failed amplifier.
S :
OLUTION
- Move the power button to the 'ON' position.
- Connect the power cord to the AC in and to the electrical outlet.
- Check the condition of the outlet.
- Replace the amplifier's main power fuse on the rear pane with the correct type & rating.
- Check for the proper function of the input source device.
- Check the input cables and connections. Replace questionable cables with tested, reliable cables.
- Check the speaker cables and connections. Replace questionable cables with tested, reliable cables.
- Check the operating condition and status of the speaker system(s). Be sure the volume rotary controls are set properly.
- Adjust the amplifier's level controls to the appropriate volume level. as per instructions.
- Adjust the amplifier's level controls to the appropriate volume level as per instructions.
- Use the correct cables (as shown on the back of the unit).
- Check for proper AC line ground on the amplifier and all input devices.
- Check the input cables for all source devices and signal processing as well as input cables to the power amplifier.
- Check the position of the groun d lift switch as per instructions for lifting the signal ground.
- Never lift the AC ground line on the power amplifier. If you are not totally familiar with the ground lifting or unification
procedures, do not attempt them without first consulting your dealer or a qualified sound technician for more information
on grounding. Such a procedure can pose a serious safety and/or fire hazard if improperly done.
- Check the clip LEDs on the input source devices and reset the levels if necessary to eliminate the distortion.
- Adjust the amplifier's level controls to the appropriate volume level as per instructions.
- Check that the amplifier is adequately ventilated on the front and rear panels where the air vents and fans are located. If
overheated, let the amplifier cool down prior to applying an input signal.
- Verify the speaker system impedances. Be sure the total load is at least 4 ohms per channel in stereo or parallel mono
mode, or at least 8 ohms in mono bridged mode.
- Check the condition of the speaker cables.
- Check for shorts in the wiring leading from the output of the amplifier.
- Verify the speaker system impedances.
- Check the fuse type and rating is correct.
- Contact the Gemini Service Department or your authorized dealer to speak to a qualified service technician.
In the USA, call (732)738-9003.
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GPA Series