Cisco Model D9479 Gigabit QAM Modulator Installation Guide
Chapter 4 Operating the Modulator
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78-745431-01 Rev E
Replace the Fuse
Each GQAM contains a power fuse. We recommend keeping spare 4.0 A, SLO BLO
250V fuses (part number 188106) for the 120/230 VAC model GQAM and spare 6.3
A, SLO BLO 250V fuses (part number 180522) for the 48 VDC model GQAM.
Replacing the Fuse
WARNING:
Avoid electric shock! Disconnect the power cord on this product before you
Avoid electric shock! Disconnect the power cord on this product before you
remove the fuse and only use a fuse that has the correct type and rating.
1 Power down the GQAM and remove the power cord.
2 Locate the fuse holder on the left side of the back panel.
2 Locate the fuse holder on the left side of the back panel.
3 Choose one of the following options:
For the 120/230 VAC model, use a small flat-blade screwdriver to pry out the
fuse holder, then go to step 7.
For the 48 VDC model, go to step 4.
4 Loosen either fuse holder by using a small flat-blade screwdriver to turn the fuse
holder counter-clockwise.
Note: A fuse is required for both fuse holders. Replace either or both fuses as
Note: A fuse is required for both fuse holders. Replace either or both fuses as
needed with identical fuses.
5 Remove the fuse.
6 Insert a new fuse into the fuse holder, then go to step 10.
7 Locate and remove the spare fuse from the hidden compartment on the fuse
6 Insert a new fuse into the fuse holder, then go to step 10.
7 Locate and remove the spare fuse from the hidden compartment on the fuse
holder.