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Appendix C: Service
Replacing the Fuse
1. Disconnect the power cable from the television demodulator rear
panel.
2. Remove the fuse holder by inserting a suitable instrument on either
side of the holder and pulling straight out.
3. Remove the old fuse and replace it with a new fuse of the same
type. Use only 250 V, 1.6 A time-delayed fuses.
4. Replace the fuse holder ensuring that the holder clicks back into its
socket.
Cleaning the Exterior
The instrument should be cleaned often enough to prevent dust and
dirt from accumulating. Dirt acts as a thermal insulator, preventing
effective heat dissipation and providing high-resistance electrical
leakage paths between conductors or components in a humid
environment.
CAUTION. To avoid damaging the unit, do not allow water to get inside
any enclosed assembly or component. Do not clean any plastic
materials with benzene, toluene, xylene, acetone, or similar solvents,
because they may damage the plastic.
Clean the dust from the outside of the instrument with a soft, dry cloth
or small brush. A brush is especially useful for removing dust from
around the buttons and connectors.
C–2
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DS1000 Series User Manual
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