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NAD C715 - Page 67

NAD C715
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Product: C715
Hardware Technical Bulletin: C715-H2009-01
Date: APRIL 1 2009 Subject: TRAY FUNCTIONALITY
Note:
This condition only affects a small number of units produced with
this batch of leaf switches
DESCRIPTION: CD tray may not open or close.
REASON: The tray sense switch can grow tiny conductive "whiskers"
across it's contact pads shorting the switch and preventing the tray from
opening/closing.
SOLUTION: Change the value of R101 and R731102 from 18K to 470
ohm to increase the current flow across each contact switch pads eliminating the
“WHISKERS”. Resistor 470R 1/8w SMD 0
805.