HK 690 (serv.man4) - Harman Kardon Audio User Guide / Operation Manual. Page 8

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ENGLISH

This unit is designed for trouble-free operation; most problems users encounter are due to operating errors. So if you have a problem, first check this list for a possible solution. If the
problem persists, consult your authorized Harman/Kardon service center.

No lights illuminate when power cord is plugged into AC outlet.

• The unit is plugged into a live outlet.

No sound is heard.

• Speaker switches corresponding to the desired speakers are pressed.
• Correct source button has been pressed.
• Volume is turned up.
• Speaker wires are connected properly.
• Hook-up wires to source component are connected properly.

Sound is not heard from the speaker system on one side.

• The speaker wires and connection wires are connected correctly.
• The balance control knob is set to the center.

When listening to stereo sound, the left and right sounds are reversed.

• The speaker wires are connected correctly.
• The wires between components are connected correctly.

Intermittent or continuous buzzing or hissing.

• The unit is away from fluorescent lights, TV, motors and other electrical appliances.

Cannot monitor a recording using Tape 1.

• This is not possible. Use Tape 2.

The remote control and front panel controls don't appear to work.

• Disconnect the AC line cord from the wall socket, wait 5 minutes and then re-connect it.

Phono sound is too faint, has hum, ringing, or »howl«.

• Ground wire from turntable has been connected to ground terminal on amplifier.
• Cable from turntable is away from power cords and speaker cables.
• Turntable is away from speakers.
• Turntable is on stable surface.