I chapter 1 getting started, Unpacking, To prevent internal heat buildup in the unit – Sony STR-D790 User Manual
Page 5: Battery life
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Chapter 1 Getting Started
Unpacking
Choosing a Good Location
To prevent internal heat buildup in the unit,
place the unit in a location with adequate air circulation.
Do not Inatall the unit:
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• near heat sources such as radiators or: air ducts.
• in a place subject to direct sunlight, excessive dust,
mechanical vibration or shock.
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Do not place anything on top of the cabinet
The top ventiiation holes must be unobstructed for the
proper operation of the unit and to prolong the life of its
components.
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Do not throw away the carton and packing material!
It will be an ideal container when transporting the system for
repair work, etc.
Selecting the AM Tuning Interval
The AM tuning interval is preset to 10 kHz. To use the
receiver where the frequency allocation system is based on
a 9 kHz interval, make the following adjustments.
1 Turn on the power and tune in any AM station.
2 Turn off the power.
3 Press the POWER button while pressing the"+” INDEX
SELECT/TUNING button.
To reset the AM tuning interval, repeat the above steps.
Caution
When the interval is changed, all preset stations which you
have memorized will be erased. After changing the interval,
be sure to preset the stations again.
Checking the Supplied Accessories
After unpacking, check that the followingiaccessories are
present.
• FM wire antenna.............................;....................(1)
• AM loop antenna............................ !....................(1)
• Remote commander RM-U221....... ...................... (1)
• Sony batteries SUM-3 (NS)............. !....................(2)
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Inserting the Batteries into the Remote
Commander
Before operating remote commander, install the batteries as
shown.
1
Open the cover.
2
Insert two size AA (R
6
)
batteries with correct
polarity.
To avoid damage caused by battery leakage and
corrosion
When the commander will not be used for a long time,
remove the batteries.
Battery life
Normal operation can be expected about a half year using
Sony SUM-3 (NS), and a year using Sony AM-3 (NW)
alkaline batteries.
When the batteries are run down, the remote commander
will not operate the unit. In this case, replace batteries with
new ones.