Accuphase P-7100 Buku Petunjuk - Halaman 5

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ACAUTIONS

I Installation location

T h e P - 7 1 0 0 e m p l o y s n a t u r a l a i r c o o l i n g . T h e r i g h t a n d l e f t

heat sinks and the too oanel will feel hot to the touch dur-

ing operation. This is normal and does not pose a problem

r e g a r d i n g r e l i a b i l i t y a n d p e r f o r m a n c e . H o w e v e r , w h e n

c h o o s i n g a n i n s t a l l a t i o n l o c a t i o n , y o u s h o u l d a l w a y s o b -

serve the following precautions.

. N4ake sure to provide for proper air circulation, and avoid

l o c a t i o n s w i t h h i g h l e v e l s o f d u s t o r h u m i d i t y .

o Avoid locations subject to direct sunlight.

o Avold locations close to heating appliances.

o Choose a level, stable surface that is not subiect to vi-

brations.

Never stack the unit directlv on top of a power ampli-

fier or other audio comoonent.

lAlways

turn the power to all components off be-

f o r e c o n n e c t i n g o r d i s c o n n e c t i n g a n y s p e a k e r

cables or inpuVoutput cables.

o When inserting or removing RCA{ype phono plugs, the

two poles do not make or break contact simultaneously,

This momentarily non-grounded condition causes a cur-

r e n t s u r g e ( h e a r d a s a l o u d p o p n o i s e ) , w h i c h c a n s e r i -

ously damage the speakers.

o lf speaker cable is not connected properly, it may come

into contact with the chassis or with input or output con-

nectors. This can cause oop noise and damaqe the am-

p l i f i e r .

IAC

power cord connection

Since the P-7100 is rated for high power consumption, plug

the power cord of the unit directly into a wall outlet with a

sufficlent power capacity rating.

I T u r n

t h e v o l u m e a t t h e p r e a m p l i f i e r o r s i m i l a r

down before setting the power switch to OFF.

IDisconnect

the power cord plug when not using

the unit for an extended time.

lDo

not turn the power switch OFF and then im-

mediately ON again. Wait at least 10 seconds, oth-

erwise noise or other problems may occur.

lDo

not use contact refreshers or other chemicals

o n t h e i n p u t a n d o u t p u t j a c k s , s i n c e t h e s e c a n

cause aging in resin parts and lead to damage.

Maintenance

o Before performing maintenance, disconnect the power

cord from the AC outlet.

o lf required, clean the unit carefully with a soft, slightly

moistened cloth, and then wipe it dry. Never use sol-

vents or abrasive cleaning agents, since these will dam-

age the finish.

Usage Precautions

lln

some cases, when internal protection circuitry

has been triggered, the output will be shut off and

the meter illumination flashes as a warning indi-

cation.

O Thermal protection

lf due to installation conditions or other reasons the heat

sink temperature exceeds a certain threshold level, the

output is automatically

cut off and the meter illumination

flashes as a warning indication.

ln such a case, turn power to the P-7100 off and wait until

the heat sinks have fully cooled down (several hours).

Then turn power on again. This will reset the protection

circuitry.

lf for some reason the temperature rises even further,

causing the internal temperature of the power transformer

to exceed the allowable tflreshold, the circuit breaker in-

tegrated in the power transformer will be triggered and

turn the power off automatically.

This breaker resets itself

when the temperature returns to normal levels.

€Abnormal signal protection

When an abnormal signal containing DC components is

input to the P-7100, the output is automatically cut off

and the meter illumination flashes as a warnino indica-

I t o n .

ln such a case. turn oower to the P-7100 off and remove

the cause of the problem. Then turn power on again. This

will reset the protection circuitry.