CBT36K Assembly Manual
Page
19
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89
5.1.3.2. Connect the test leads to the tweeter
module:
Connect the test leads to the tweeter module as
shown above. The RED test lead connects to the
side with the RED mark on the driver (see next
photo).
5.1.3.3. Connect the other ends of the test leads to a
battery:
Hold the BLACK test lead to the (-) side of a 1.5v
battery and tap the RED test lead on the (+) side of
the battery. All cones should jump forward. If none
move, double check your connections and the
module itself.
5.1.4.
Check DC Resistance of ND91 Mid-
Bass Voice Coil:
Set the DMM to ohms and check the DC
resistance of the voice coils for all 36 ND91s. The
reading will be very close to eight Ohms. (For more
accuracy in the measurement first short the test
leads together before connecting the drivers and
subtract that reading from the measurements for
each driver). You may also use the Parts Express
WT3 to measure the impedance. This reading is
very sensitive to noise and vibration. Make this
measurement in a quiet area.
5.1.5.
Check DC Resistance of Tweeter
Modules:
Following the same procedure as in the previous
section, check the DC resistance of the tweeter
modules. Connect your test leads to the same
locations as the tweeter polarity test. The reading
also should be quite close to eight Ohms.
5.2.
P
REPARE THE
R
ESISTORS
:
Overview:
Two sets of parallel resistors with different lead
configurations are prepared in the following steps.
The first parallel combination has straight leads
coming from the resistor body:
The second parallel combination has a 90° bend in
the left lead:
These parallel resistor combinations will be
prepared in the following steps.
5.2.1.
Position Resistors:
Position the resistors as shown (check the resistor
configuration list, shown later in Section 5.2.5, to
determine which resistors get connected this way).
