darTZeel Audio NHB-108 A version - Manual (Page 13)

darTZeel NHB-108 model one Owner's Manual Page 13 of 17
The warranty will be partially or
totally void in the event of non-
compliance with the above !
2) Do not power ON the darTZeel NHB-
108 model one when no loudspeaker is
hooked to the Speaker Terminals (7).
In such a case the internal fuses
could be blown by the Crowbar cir-
cuit.
3) Before connecting or disconnecting
the audio cables to/from the RCA (6)
or XLR (4) inputs, always flip, when
possible, the Input Impedance Selector
(Z
i
)
onto "Zeel 50Ω" position. You will
thus avoid any of the resulting para-
sitic click and bumps.
7.2. Troubleshooting
While setting up your darTZeel NHB-108
model one, it is possible that you may not
obtain the desired results.
Hereunder we list the most frequent
problems you are likely to encounter. If
the problem cannot be solved, please do
not hesitate to contact us directly at:
[email protected]
7.2.1. Eyes Closed
The eyes are closed – I beg your pardon,
extinguished - while the Power Nose (3)
button is ON. Please check that the AC
power cord is correctly connected at both
ends, and that the mains AC voltage is
present. Just test with a table lamp. If
AC is present, it means that both pri-
mary fuses have melted. Please go to
point 6.1. "Fuse(s) replacement".
One Eye only is not lit. This means that
you have to change the corresponding
channel fuse.
7.2.2. Amplifier ON, no sound
Please check first the Eyes' illumination
state, as described in point 5.2.
"darTZeel's Eyes"
.
A) Idle state. No signal is present at the
input of your darTZeel NHB-108 model
one. Be sure that the source (SACD,
CD, Tuner or whatever) is correctly
selected and connected to the
preamplifier feeding your machine.
Please also verify that the Input Im-
pedance Selector (Z
i
)
of each channel is
at the lower position (Hi Z).
B) Signal presence. The input source is
correctly connected and routed, but
the loudspeakers are not hooked to
the Speakers Terminals (7)! We remind
you that this is totally forbidden.
Okay, no trouble for this time. You are
lucky enough that the Crowbar circuit
did not melt one fuse or two…
7.2.3. Warped sound
The Input Impedance Selector (Z
i
)
of one
or both channels is in the upper position
(Zeel 50Ω).
Your present preamplifier not being a
darTZeel (this will change one day), its
outputs cannot drive 50Ω loads.
So please switch the Input Impedance Se-
lector (Z
i
)
in Hi Z mode (lower position).
7.2.4. Sensitive fuses
Fuses have the bad tendency to melt
much too often. Why, then, not replace
them by a higher value rating?
Please never, ever do such a thing!
Improper fuse ratings could produce a
fire! Please carefully read the Audio-
phile's technical manual in order to bet-
ter know the Crowbar circuit.
Fuses can blow if the nominal impedance
of your speakers is less than 4Ω and
your darTZeel NHB-108 model one has not
been set up to drive such a load.
Please refer to chapter 5.3. "User parame-
ters "
. Then again check your fuses if you
are in doubt, by taking a look at point
6.1. "Fuse(s) replacement"
. Be sure that
you are using fuses of correct rating .
7.2.5. Sound too quiet
A) darTZeel's Eyes are in the following,
quasi-permanent state:
Clipping.
Your speakers are particularly ineffi-
cient! Please choose loudspeakers of
more than 84 dB/w/m …