Nakamichi NKSA60.4, Руководство пользователя

Страница: 9 / 12

Symptom
no output
low or no remote turn-on
input
check remote turn-on voltage
output at amplifier and correct
as needed
Possible Cause Action To Take
TROUBLESHOOTING
9 EN
audio cycles on
and off
speakers are blown
check system with known
working speaker and repair or
replace speakers as needed
distorted output
amplifier level sensitivity set
too high; exceeding maximum
output capability of amplifier
reset gain referring to the
tuning section of the manual
for detailed instructions
fuse blown
check power wire integrity
and reversed polarity, repair
as needed and replace fuse
power wires not connected
check power wire and ground
connections and repair of
replace as needed
audio input not connected
or no output from source
check input connections and
signal integrity, repair or
replace as needed
speaker wires not connected
check speaker wires and repair
or replace as needed
thermal protection engages
when amplifier heat sink
temperature exceeds 90
℃
make sure there is proper
ventilation for amplifier and
improve ventilation as needed
loose or poor audio input
check input connections and
repair or replace as needed
impedance load to amplifier
too low
check speaker impedance load
if below 2ohm stereo or 4ohm
mono rewire speakers to
achieve a higher impedance
ishorted speaker wires
check speaker wire connections
and repair or replace as needed
speaker not connected to
amplifier properly
check speaker wiring and repair
of replace as needed refer to the
installation section of this
manual for detailed instructions