Operation
Memory Backup
This product is equipped with a memory backup system that preserves tuner presets and system configuration information if the unit is acciden- tally unplugged or subjected to a power out- age. The unit’s memory is stored in an EEPROM, and thus the HK 3470 will retain information such as programmed presets without being connected to a main power source virtually indefinitely.
Processor Reset
In the rare case where the unit’s operation or the displays seem abnormal, the cause may involve the erratic operation of the system’s memory or microprocessor.
To correct this problem, first unplug the unit from the AC wall outlet and wait at least three minutes. After the pause, reconnect the AC power cord and check the unit’s operation. If the system still malfunctions, a system reset may clear the problem.
If the system still does not respond, it may be necessary to perform a complete reset. To reset the system, first turn the HK 3470 off by press- ing the Main Power Switch 1 and then releasing it so that it extends out beyond the front panel and the word “OFF” is visible in red at the top of the switch.
Next, press and hold the
The Main Information Display will briefly show the word RESET, and then return to normal operation.
Note that when the system is reset in this fash- ion, all tuner presets will be lost and must be reentered.
If the system is still operating incorrectly, there may have been an electronic discharge or severe AC line interference that has corrupted the memory or microprocessor.
If these steps do not solve the problem, consult your dealer or an authorized Harman Kardon service center.
Troubleshooting Guide
This unit is designed for
If the problem is... | Make sure that the... |
No lights appear when POWER button is pressed | Unit is plugged into a live outlet. |
| Main power switch is pressed in. |
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No sound is heard | Unit has not been muted. |
| Correct input function selector button has been pressed. |
| Volume is turned up. |
| Speakers have been turned on using the Speaker Selectors. |
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No output from one or more channels | Cables are not defective: check/replace speaker cables. |
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Tuner sound has a large amount of interference, or | Antenna is properly connected. |
the “Stereo” display is not illuminated, or | Antenna is properly located. |
Tuner sound distorts and/or volume level is too low | Antenna is set in the proper direction. |
| Antenna is adequate to receive the desired station. |
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Tuner is intermittent or continuously buzzing or hissing | Unit is away from fluorescent lights, TVs, motors and |
| other electrical appliances. |
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Remote does not function correctly | Batteries are not weak, and replace them if necessary. |
| Correct device page has been selected by pressing the Source Selector key ç. |
| Remote sensor is not obstructed, and remote is pointing directly at sensor at |
| an angle of no more than 30 degrees. Also, check for fluorescent lighting, which |
| may be interfering with the IR transmission. |
| Remote has been reprogrammed correctly. If you are in doubt, reset the remote |
| to the factory default programming using the procedure outlined above. |
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Cassette or CD sounds distorted | Cassette deck or CD player has not been plugged into the Phono input. |
| (Only use the outputs of a turntable or tonearm with the Phono input.) |
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