Proceed PDSD - Manual (Page 77)

77
Care and Maintenance
To remove dust from the cabinet of the Digital Surround Decoder, use a feather
duster. To remove dirt and fingerprints, we recommend isopropyl alcohol and a
soft cloth.
Caution! Always apply the isopropyl alcohol to the soft cloth and then
wipe the Digital Surround Decoder with the dampened cloth.
Never pour or spray even small amounts of any liquid directly
on the Digital Surround Decoder, as doing so may allow the
liquid to reach the circuitry inside the unit. Any liquid inside
the unit poses a hazard to both the user and to the unit, and
must be avoided.
When the Remote Control’s batteries need to be replaced, use only AA batteries;
always replace both batteries at the same time. If you don’t plan to use the Re-
mote Control often, remove the batteries. When not used for an extended period,
even “leakproof” batteries can leak corrosive acids that will damage the Remote
Control (and will void the warranty on the remote control).