the design of the GFA-555 w ill allow music to remain audible for several seconds
after the am p lifier has been shut o ff. We suggest that you v aic u ntil the red
power LED has stopped glowing before turning o ff your pre-amp and other a ssociated
audio equipment:. This procedure w ill avoid tu rn -off tra n sien ts from reaching your
speakers.
SECTION 4
SAFETY WARNING
CAUTION: TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE COVER, NO USER
SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED PERSONNEL ONLY.
SERVICE TECHNICIANS NOTE
THE FILTER CAPACITORS USED IN TI1E GFA-555 RETAIN A CHARGE FOR SOME TIME
EVEN AFTER THE UNIT IS TURNED OFF AND UNPLUGGED. DO NOT TOUCH ANY INTERNAL
WIRING OR COMPONENTS INCLUDING THE INTERNAL FUSES UNTIL THE CAPACITORS ARE
FULLY DISCHARGED. SEE GFA-555 SERVICE MANUAL FOR ADDITIONAL WARNINGS.
CAUTION: Burn-out o f the output stage because of fa ilu re to observe the
follow ing precautions w ill void the warranty*
There is no such thin g as ab solu te r e lia b ility or protection when am p lifiers
are abused. While the GFA-555 am plifier has been designed to operate relia b ly
under norwal co n d ition s, i t may not be Impervious to gross abuse. There is one
con dition which must always be avoided: This condition is called RF D etection and
because ADCOM a m p lifiers have an extremely wide bandwidth, RF Detection w ill alm ost
certa in ly cause fa ilu r e o£ the output devices if i t occurs. Damage to , or fa ilu re
of the equipment due to th is reason i s considered abuse, and is s p e c ific a lly
excluded from Che ADCOM warranty.
The follow ing acts cause RF D etection and MUST BE AVOIDED:
1. Connecting the inputs or outputs w hile the am plifier is on.
2. Using the 11 thumb te st." It is a dangerous habit to contifedt cab les to the
in puts, touching the other end of the cable w hile the am p lifier is on.
This may not only cause am plifier fa ilu re but may destroy your loudspeakers
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