How do i factory reset my Harman Kardon avr 55 receiver

Troubleshooting Guide

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.
To clear the AVR 520's entire system memory
including tuner presets, output level settings delay times and speaker configuration data,
first put the unit in Standby by pressing the
System Power Control button 2. Next,
press and hold the Tone Mode 8 and the
FM Mode Selector ^ buttons for three
seconds.
The unit will turn on automatically and display
the RESET message in the Main
Information Display Y. Note that once you
have cleared the memory in this manner, it is
necessary to reestablish all system configuration
settings and tuner presets.


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