Drawmer 1976 Instrukcja obsługi - Strona 4

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The 1976 is designed for standard 19" rack mounting and

occupies 1U of rack space. Avoid mounting the unit directly

above power amplifiers or power supplies that radiate

significant amounts of heat and always connect the mains

The 1976 unit will be supplied with a power cable suitable for domestic power outlets in your country. For your own safety,

it is important that you use this cable to connect to the mains supply earth. The cable must not be tampered with or

modified.

The power supply socket has an integral fuse drawer containing the power fuse of the same value, to suit the mains

voltage for which the unit has been supplied. Removal of the drawer is only possible with the power cord removed. The

fuse should never blow under normal operation. If the fuse is suspected of having blown, then a fault will have occurred

and this fault condition should be inspected by a qualified service engineer. When replacing the fuse, always comply with

the Safety Instructions.

If the unit is to be used with a mains input operating voltage different to that for which the unit is supplied, the following

procedure must be carried out by a technically competent person, (see following diagrams)

1: Disconnect the unit from the mains.

2: Using a number 1 size pozidrive

screwdriver, remove the seven self

-tapping screws that retain the top cover. Tw

screws are f ound along each

side; two along the top edge at the rear;

and the upper central screw on the front

facia panel.

3: Slide the voltage change-over switch

(S11) until the correct (or nearest) mains

input voltage is visible on the switch

actuator.

(see fig.2)

For con versi on to 115Volt AC

(previously set to 230Volt AC).....

4a: Exchange the 160mA fuse below

the mains socket for a similar type rated

at 315mA

For con versi on to 230Volt AC

(previously set to 115Volt AC).....

4b: Exchange the 315mA fuse below

the mains socket for a similar type rated

at 160mA

In all cases:

5: Replace the top cover using the seven

screws.

6: Re-connect to mains power source.

INSTALLATION

earth to the unit. Fibre or plastic washers may be used to

prevent the front panel becoming marked by the mounting

bolts. It is also advisable to leave space above the unit to

allow the heat to dissipate.

POWER CONNECTION

Voltage Selector

Switch located here

DRAWMER 1976 O

PERATOR'S

fig.2 The Voltage Selector Switch

fig.3 The Location of the Fuse

ANUA

Fuse