Harman Kardon HK620 Owners Manual - Page 9

TROUBLESHOOTING 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. If the problem is: No lights illuminate when power cord is plugged into AC outlet. No sound is heard. Sound is not heard from the speaker system on one side. When listening to stereo sound, the left and right sounds are reversed. Intermittent or continuous buzzing or hissing. Cannot monitor a recording using Tape 1. The remote control and front panel controls don't appear to work. Phono sound is too faint, has hum, ringing, or "howl." Make sure that: ■ The unit is plugged into a live outlet. ■ Press the Speakers switches corresponding to the desired speakers. ■ Correct function button has been pressed. ■ Volume is turned up. ■ Speaker wires are connected properly. ■ Hook-up wires to source component are connected properly. ■ The speaker wires and connection wires are connected correctly. ■ The balance control knob is set to the center. ■ The speaker wires are connected correctly. ■ The wires between components are connected correctly. ■ The unit is away from fluorescent lights, TVs, motors and other electrical appliances. ■ This is not possible. Use Tape 2. ■ Disconnect the AC line cord from the wall socket, wait 5 minutes and then re-connect it. ■ 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. Note: The optional phono board is required to play a turntable. 8