Yamaha PROFESSIONAL PC1602 Operating Manual page 9

COOLING FAN FILTER MAINTENANCE
The filter element is removed and cleaned as follows.
1. Remove the two upper screws on the rear panel with
a 3 mm Allen hexagonal wrench.
Remove the filter cover.
2. Remove filter element and wash with plain water.
Detergent may also be used if the filter is exceptionally
dirty.
3. Dry the filter thoroughly. NEVER REPLACE THE
FILTER WHILE IT IS WET!
4. Replace the filter element and filter cover.
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Filter Cover
BLOCK DIAGRAM
CLIP
DETECTOR
SIGNAL
INDICATOR
AMP
CH-A o
INPUT
CH-A OUTPUT
VOLTAGE
amp CURRENT
AMP
PROTECTION
CIRCUIT
PROTECTION
p
VOLTAGE
AMP CH-B OUTPUT
CH.B о
INPUT
LEVEL
CURRENT AMP
CLIP
DETECTOR
CLIP SIGNAL
iNDICATOR
AMP