![background image](http://html1.mh-extra.com/html/octave/jubilee-pre/jubilee-pre_manual_723769016.webp)
16
7. SERVICE NOTES
7.1 TROUBLESHOOTING
Amplifier will not switch on
POSSIBLE CAUSES
> The Jubilee power supply power cord is
loose or not connected correctly
> No or faulty power connection between
preamp and power supply
> Blown fuse in the Jubilee power supply
REMEDY
> Connect power cord and check the wall
socket and power connections
> Check the connection of the power cord to
the wall socket and the power cord between
the Jubilee power supply and preamp
> Have a qualified service engineer check
your equipment and replace the fuses (iden-
tical rating and type!)
Preamp turns on, but no sound
POSSIBLE CAUSES
> Amplifier has only recently been switched
on or the gain switch has been operated
> The Jubilee preamplifier has muted (Mut-
ing LED illuminated) or the volume control
is turned down
> Input selector knob or mode selector
knob not set correctly
> Power amplifiers or source equipment not
switched on or not in play mode
> Problem with the installation: faulty leads
between source equipment and/or power
amplifier and the Jubilee preamplifier
REMEDY
> Wait until the preamplifier has warmed up
(about. 6 minutes) and the Operate LED is lit
> Deactivate Muting on the Mode Selector
knob
(LED will extinguish) or slowly turn
up the volume with volume knob
2
.
> Check the setting of the Input Selector
3
and Mode Selector knob
.
> Switch on power amplifiers. Switch on
source equipment and play some music
> Check leads and connections and correct
faults
Humming and crackling
POSSIBLE CAUSES
> The connecting lead phono plugs are not
making a proper connection to ground
> Inadequate contact between the phono
plug's signal pin and the phono socket
> Hum on XLR input
REMEDY
> Check your interconnect cables and make
sure that phono plugs are a tight fit. If the
plugs appear loose, you can try bending the
ground contacts (on the outside of the plug)
in slightly.
> Try another interconnect or, if necessary,
have the RCA / CINCH phono sockets re-
placed by the OCTAVE service department.
>
GROUND LIFT XLR INPUTS
11
(See
Connections in Sect. 4.1) in DISCONNECT
position. Lifting the ground helps to prevent
unwanted noise in balanced operation.
Содержание JUBILEE Pre
Страница 1: ...JUBILEE Pre ...