Philips SM30 User Manual download pdf (Page 16)

14

5.4 Mounting in a 19” rack

The SM30 Control Centre is available in

two versions:

LBB 1280/30 for table top use including the

cover.

LBB 1280/40 for 19” rack mounting,

without cover but including the mounting

brackets.

Removing Feet

WARNING: Before attempting to open

the housing, the mains lead and the 48 V

DC battery plug should be disconnected.

It is not sufﬁcient to merely switch off the

ON/OFF switch on the front panel.

The feet of the Control Centre may be

removed for rack mounting if space is

limited. To remove the feet simply unscrew

the cross-headed screw which is recessed in

the centre of each foot.

If rack space is not limited however, it is

preferable to leave the feet in position and to

mount a narrow blank rack panel beneath

the unit. If the Control Centre then has to

be removed for servicing, the feet will

protect the surface of furniture from being

scratched by metal components of SM30.

Calculating Required Rack Space

To simplify ordering of modular units and

panels to ﬁt into standard 19” rack units,

Philips have chosen a standard height ‘HE’

equal to 44.55 mm (1.75 inches). Each

SM30 Control Centre, for instance, is 3 HE

high, requiring 133.65 mm of rack space.

The use of the HE unit eases the problem of

calculating the number of equipment

housings, blank panels, etc. that will ﬁt into

a rack.

General Rules

Certain rules should be observed when

planning the equipment layout in a rack:

1 To ensure that the SM30 display is clearly

visible, and the controls are easy to

operate, the Control Centre should be

mounted at a height which makes it easily

accessible (head, or shoulder height if

possible).

2 Cassette front loaders, tuner scales, and

other frequently used equipment, should

be mounted at a height which makes

their front panels clearly visible to the

operator.

Fig. 5.4 - Rack mounting

3HE

PHIL IPS

SM30

Power

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GB/SM 30 user manual 5/26/98 10:18 AM Page 14

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