Memory Backup; Processor Reset; Troubleshooting Guide - Harman Kardon HK 3470 Owner's Manual

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.

Troubleshooting Guide

T
his unit is designed for trouble-free operation. Most problems users encounter are due to operating errors. 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 appear when POWER button is pressed
No sound is heard
No output from one or more channels
Tuner sound has a large amount of interference, or
the "Stereo" display is not illuminated, or
Tuner sound distorts and/or volume level is too low
Tuner is intermittent or continuously buzzing or hissing
Remote does not function correctly
Cassette or CD sounds distorted
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 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 T-Mon and CD Input
Selector buttons on the front panel
ONLY. While holding these buttons in, press the
Main Power Switch in until it latches, so
that the button is flush with the front panel.
Make sure that the...
Unit is plugged into a live outlet.
Main power switch is pressed in.
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.
Cables are not defective: check/replace speaker cables.
Antenna is properly connected.
Antenna is properly located.
Antenna is set in the proper direction.
Antenna is adequate to receive the desired station.
Unit is away from fluorescent lights, TVs, motors and
other electrical appliances.
Batteries are not weak, and replace them if necessary.
Correct device page has been selected by pressing the Source Selector key
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.
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.)
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.
19 OPERATION/TROUBLESHOOTING
.