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8504 OPERATOR'S MANUAL – SECTION 7
7 Maintenance
Simple maintenance can be performed by the user
to help keep the equipment operational. The fol-
lowing routine maintenance is designed to prevent
problems before they occur. See the Trouble-
shooting section, for recommendations for re-
storing the equipment to operation after an error
condition has occurred.
Preventative maintenance is recommended after
the first 250 hours of operation, and every three
months or 250 hours thereafter. If the equipment
environment is dirty or dusty, preventative mainte-
nance should be performed more frequently.
Before you begin, make sure your ampli-
fier is disconnected from the power
source, with power switch in the OFF
position and the level control turned
completely down (counter-clockwise).
7.1 Clean Amplifier Filter and Grills
7.1.1 Tools Required
The recommended equipment and supplies
needed to perform the functions required for this
task are described as follows.
96-8005353_8-12-2020
CAUTION
Information subject to change
•
Vacuum cleaner
Damp cloth (use water only or a mild soap
•
diluted in water)
To ensure adequate cooling and maximum ef-
ficiency of the internal cooling fans, the amplifier's
front and rear grills should be cleaned periodically.
To clean the amplifier grills and filter, complete the
following steps:
1. Turn the amplifier OFF. Disconnect the ampli-
fier from its power source.
2. The front grill is secured to the amplifier front
panel by magnets. Pull out on the grill to re-
lease it from the front panel.
3. Remove the filter located behind the front grill.
4. Using a vacuum cleaner, vacuum the front ven-
tilation grill, the grill filter, and the back ventila-
tion exit grill.
5. Using a damp cloth, clean the amplifier front
panel and the rear ventilation grills. Also use
the damp cloth to clean the front grill and filter.
If necessary, these can be immersed in warm,
soapy water.
6. Dry the front panel, filter, and grills with a clean
cloth or allow to air dry. IMPORTANT: All parts
should be completely dry before plugging
in or restarting the amplifier.
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