HK 3270 (serv.man4) - Harman Kardon Audio User Guide / Operation Manual. Page 20

Operation

18

ENGLISH

This product is equipped with a memory
backup system that preserves tuner presets
for about two weeks if the unit is
accidentally unplugged, subject to a power
outage or tuned off completely with the

1

.

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 HK3270
RDS off by pressing the 

1

and then releasing it so that it

extends out beyond the front panel and the
word “OFF” is visible in red lettering at the
top of the switch.

Next, press and hold the 

and 

buttons 

! #

on the

front panel ONLY. While holding these
buttons in, press the 

1

in until it latches so that the

button is flush with the front panel.

The Information Display will briefly show
the word 

RESET

, and then return to

normal operation.

Note that when the system is reset in this
fashion, 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 an authorized Harman Kardon
service depot.