Marantz AV9000 - Manual (Page 39)

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ENGLISH GENERAL MALFUNCTION
If the equipment malfunctions, this may be because an electrostatic
discharge or AC line interference has corrupted the information in
the equipment memory circuits. Therefore:
- disconnect the plug from the AC line supply
- after waiting at least three minutes, reconnect the plug to the AC
line supply
- re-attempt to operate the equipment
ERROR MESSAGES
When the display indicates some error messages (e.g. ERROR **),
unplug the power cable immediately. Contact your dealer, nearest
Marantz distributor or the Marantz service center in your area.
HOW TO RESET THE UNIT
Should the operation or display seem to be abnormal, reset the unit
with the following procedure.
The AV9000 is turned on, press and hold the
CLEAR !7 and MODE
u buttons simultaneously for 3 seconds or more.
Remember that the procedure will reset the settings of the function
selector, Surround mode, delay time, TUNER PRESET etc., to their
initial settings.
Memory backup
n In case a power outage occurs or the power cord is
accidentally unplugged, the AV9000 is equipped with a
backup function to prevent memory data such as the preset
memory from being erased.
The memory functions are backed up for up to about one
week.
NOTE:
First of all keep AV9000 Standby or Powered-on more than 8
hours, to sufficient time for memory back up.