Marantz SR7200 User Manual page 37

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
Memory backup
• In case a power outage occurs or the power cord is
accidentally unplugged, the SR7200 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 SR7200 Standby or Powered-on more than 6
hours, to sufficient time for memory back up.
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