9
PH 7
Italian MM & MC Phono Preamplifier
Troubleshooting
SYNPTOM DESCRIPTION
CAUSE
REMEDY
SPEAKER HUMMING
PROBLEMS
The speakers hum
when the Phono Stage
is connected to the
system
•
The Phono Stage is very
SENSITIVE to house
environment positions and
more in general
geographical AREAS too.
•
Be sure your area and
personal environment are
compatible with the
Phono Stage.
•
The Ground connector is
not plugged anywhere.
•
The Ground connector is
plugged.
•
Try to plug or to unplug
the ground connector
always finding the best
solution in your system.
The Electrical loops
created by the ground
connection can not be
theoretical solved before
installation EVER.
•
The Phono stage Input
Interconnect are not
plugged.
•
Having an “open” input
the Phono Stage strongly
hum. Connect the Input
Interconnect to the Phono
Stage to eliminate such
matter.
•
The listening volume is very
high.
•
Any high gain phono
stage designed to
achieve good sonic
performances hums a bit
when the volume of the
amplifier is increased.
That is normal and
strongly noticeable
especially without music
and with MC gain unit
selection.
•
The tone arm and cartridge
are not properly installed
•
Install them well.
Eventually a tone arm
cable problem can occur;
please check other ways
out
•
The cartridge gain is wrong.
•
Select the cartridge gain
following the
manufacturer instructions
•
The interconnect input
and/or output cables are
not shielded.
•
Be sure to always use
shielded cables for Phono
Stage connections.
SWITCHING ON/OFF
BUMP
The Phono Stage
bumps any time is
switched ON or OFF
•
It is important to notice
that it does not produce
any risk even if the bump is
high
•
PHONO STAGE (THE)
DOES NOT WORK WHEN
THE PHONO STAGE IS
SWITCHED ON
•
The AC Phono Stage plug
is disconnected from the AC
wall plug
•
Connect it being sure that
the AC wall plug works
•
The interconnect cables are
not properly connected to
the Phono Stage.
•
Connect them properly
•
The fuse is blown
•
Substitute the fuse with
one of the same value
•
•
Be sure you selected the
right Input on the
amplifier
Troubleshooting
