Yamaha PW1D Operating Notes, , Rack Mounting Caution

• Hold the power cord plug when disconnecting from

an AC outlet. Never pull the cord. Damaging the

power cord in this way is a potential ﬁre and electrical

shock hazard.

• Do not place small metal objects on top of the power

supply unit. Metal objects inside the power supply

unit are a ﬁre and electrical shock hazard.

• Do not block the power supply unit ventilation slots.

The power supply unit has ventilation slots at the

front and rear to prevent the internal temperature

from rising. Blocked ventilation slots are a ﬁre hazard.

• Leave a reasonable amount of free-air space around

the power supply unit.

• If the power supply unit is to be rack mounted, leave

at least 10 cm free above the top panel and behind the

rear panel. When the power supply unit is in use,

remove the rear of the rack, or open its ventilation

slots to prevent overheating, which could be a ﬁre

hazard.

• Do not try to modify the power supply unit. This

could be a ﬁre and electrical shock hazard.

• The power supply unit operating temperature is

between 10˚C and 35˚C (58˚F and 95˚F).

• If you notice any abnormality—such as smoke, odor,

or noise—turn off the power supply unit immediately.

Remove the power cord from the AC outlet. Conﬁrm

that the abnormality is no longer present. Consult

your dealer for repair. Using the power supply unit in

this condition is a ﬁre and shock hazard.

• If a foreign object or water gets inside the power sup-

ply unit, turn it off immediately. Remove the power

cord from the AC outlet. Consult your dealer for

repair. Using the power supply unit in this condition

is a ﬁre and electrical shock hazard.

• If you plan not to use the power supply unit for a long

period of time, remove the power cord from the AC

outlet. Leaving the power supply unit connected is a

ﬁre hazard.

• Do not use benzene, thinner, cleaning detergent, or a

chemical cloth to clean the power supply unit. Use

only a soft, dry cloth.

• The power supply unit uses high-frequency digital cir-

cuits that may cause interference on radios and televi-

sions placed close to it. If interference does occur,

relocate the affected equipment.

• The power supply unit is equipped with the ground

connector to avoid the risk of electrical shock.

Be sure to ground the unit before you insert the power

plug into an AC outlet.

If the power cord has three pins and the ground con-

nector on the AC outlet is grounded, the unit will be

grounded effectively.

Operating Notes

• The power must be turned on/off using the POWER

switch of this unit. Do not turn the power on/off by

plugging in the power cable, or by using a power strip

or circuit breaker. Doing so may cause malfunctions.

• Do not rapidly turn on and off the POWER switch of

this unit. Doing so may cause excessive current to

damage the system. You must allow at least ﬁve sec-

onds to elapse between power-on and power-off.

Rack Mounting Caution

If the unit is rack mounted and transported regularly,

for example, when on a tour, we recommend that the

rear of the unit be supported by ﬁtting a pair metal

brackets, one each side. The following drawing pro-

vides the information necessary to make such brack-

ets.

Note that only one bracket is shown here and the

bracket for the other side must be bent in the opposite

direction.

86.5

20.5

3.1

4-ø6.5

2-R2

t = 1.6

(82.1)

76.2

44.45

31.75

5.9

36.5

14.5

7.5

134

200