CBT36K Assembly Manual
Page
18
of
89
5. TESTING AND PREPARATION OF
WIRES, COMPONENTS, AND
RESISTORS:
5.1.
T
EST ALL
M
ID
-B
ASS
D
RIVERS
AND
T
WEETER
M
ODULES
:
These steps must be done first to insure that all the
drivers are operating satisfactorily.
5.1.1.
Check the ND91 Drivers for Debris
in the Voice Coil:
Hold the driver close to your ear and press the
center of the cone gently and listen for scraping
noises. Good drivers are completely quiet!
5.1.2.
Check ND91 Voice Coil Polarity:
5.1.2.1. Connect test leads:
Connect test leads to the ND91. RED clip to the (+)
terminal and BLACK clip to the (-) terminal.
5.1.2.2. 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. The cone should move out!
5.1.3.
Check Tweeter Module Voice Coil
Polarity:
Here you will check the polarity of each of the
tweeter modules (36 in all).
5.1.3.1. Look for the Red Mark on the Positive
Tweeter Terminal:
Locate the Red marks on the tweeter module.
