Marantz SR8001 Service Manual page 13

Product Reset
To reset the back up memory of the unit into the default
status, follow the procedure below.
Should the operation or display seem to be abnormal,
reset the unit with the following procedure.
To turn on the SR7001/SR8001, press and hold the
MULTI and SPEAKERS A/B 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.
Personal notes:
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