Dolby Laboratories CP650 Installation Manual download pdf (Page 26)

Dolby

Model CP650 Installation Manual Installation

2-2

2.1.3 Disconnect the Old System

• Disconnect power from the existing cinema sound equipment.

• Disconnect all cabling from the existing sound processor. Leave the cables

connected to the power amplifiers, booth monitor, etc.

2.2 Check Fuse and Bypass Mains Voltage Selector

WARNING: Check that the correct main fuse has been installed. To reduce

the risk of fire, replace only with fuses of the same type and rating.

The CP650 uses a universal switching power supply that can accommodate nominal

mains voltages from 100 to 120, and 200 to 240 VAC, at frequencies from 50 to

60 Hz.

Check Main Fuse

The main power supply fuse is a 6.3 A, 250V, 20 mm, time-lag, low breaking

capacity fuse (T 6.3 L). With a small flat-blade screwdriver, open the fuse

compartment door on the AC power input housing (See Figure 2–1.)

Figure 2–1 Main Fuse Assembly

Remove the fuse carrier and check that the fuse in the active (left position) is of the

correct rating. The fuse carrier must be inserted into the compartment with the fuse

oriented to the left. Do not force the carrier into the compartment. Damage will

result. The polarizing clip must be attached on the right side of the carrier at the rear.

Snap the fuse compartment door closed.

Check Bypass Supply Mains Voltage Setting

The bypass power supply mains voltage selector switch is accessible through a hole

in the top cover of the CP650. Use a screwdriver to set the switch to either 120 or

220 VAC Figure2_8 shows the switch location.

Caution: Be sure to check this setting. If the bypass voltage selector is set to 120 V but the

unit is connected to 220 V mains voltage, the bypass power supply fuse will blow.

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Dolby Laboratories CP650 Installation Manual Page 26