Dolby Laboratories DP572 - Manual (Page 15)

Dolby E Multichannel Distribution System User Manual Introduction
1-3
1.1 Unpacking and Inspection
Before unpacking the unit, inspect the outer carton for shipping damage. If the carton
shows damage, inspect the unit in those areas.
Several accessories are provided with the unit. These may include:
• Rack screws and washers
• Power cord
• BNC 75 Ω terminators, used on Digital and Video Ref inputs (Part No. 79114)
• Spare fuse 1 A (Part. No. 56016)
• Spare fuse, 2 A, used on the internal power supply (Part No. 56017)
• Hex wrench (to access inside of unit)
Carefully remove the unit from its carton, remove the plastic wrapping, and place on a flat
surface. If there are no signs of damage, proceed to Section 1.1.1 - Fusing Information.
1.1.1 Fusing Information
WARNING: To reduce the risk of fire, replace fuses only with the same type and rating.
Each unit uses a universal switching power supply that handles the full range of nominal
mains voltages between 90 and 264 VAC and any frequency between 50 and 60 Hz.
Check Main Fuse
T 1A L - 1 Amp, 250 V, 20 mm, time-lag fuse, low-breaking capacity (for all operating
voltages)
WARNING: The power to the unit must be off when the following steps are performed.
Ensure that the main power cable to the unit is not connected to a power source.
1. Open the fuse compartment door in the AC power input housing with a small
flat-blade screwdriver (Figure 1-1).
2. Check that the fuse in the active (lower) fuse carrier is the correct rating. The
fuse carrier must be inserted into the compartment with the orientation
shown in Figure 1-1. Do not force the carrier into the compartment or both
could be damaged.
3. Snap the fuse compartment door closed.