Marantz SR4200 - Manual (Page 25)

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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
HOW TO RESET THE UNIT
Should the operation or display seem to be abnormal, reset the unit
with the following procedure.
Press POWER button x to set SR4200 in standby mode, then press
and hold the F/P !4 until SR4200 is turned on.
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
• In case a power outage occurs or the power cord is
accidentally unplugged, the SR4200 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 SR4200 Standby or Powered-on more than 6
hours, to sufficient time for memory back up.