Руководство Пользователя для Crown 1-vcap
page 7
VCA-MC Series Amplifier Accessories
Operation Manual
3 Setup
It is important that you read and understand Section 4 “Operation” and Sec-
tion 5 “Theory of Operation” before completing the setup of the system. Seri-
ous damage may result to the loudspeakers if VCA operation is not well
understood.
tion 5 “Theory of Operation” before completing the setup of the system. Seri-
ous damage may result to the loudspeakers if VCA operation is not well
understood.
The VCA-MC4A and VCA-MC8 can be controlled either by Crown VCAP wall-mount level
controls, by your own potentiometer, or by an external variable-voltage source (0-10 VDC).
controls, by your own potentiometer, or by an external variable-voltage source (0-10 VDC).
3.1 Wiring to the 1-VCAP or 4-VCAP Wall-Mount Control
1. Install a single-gang junction box for the 1-VCAP or a double-gang junction box for the
4-VCAP. Run a cable between the junction box and the power amplifier, allowing some
slack on both ends. No cable is provided. CAT-5 cable will work fine, but Crown recom-
mends using standard twisted-pair shielded microphone cable.
slack on both ends. No cable is provided. CAT-5 cable will work fine, but Crown recom-
mends using standard twisted-pair shielded microphone cable.
2. See Figure 3.1. In this example, the twisted-pair HOT led is white; the twisted-pair COLD
lead is black. On the VCAP circuit board, pull out and turn over the removable barrier-
strip plug to expose the screws. Then connect the cable leads to the barrier-strip plug
from left to right as follows: COLD lead, HOT lead, Shield. The facing side of the VCAP
circuit board is labeled accordingly.
strip plug to expose the screws. Then connect the cable leads to the barrier-strip plug
from left to right as follows: COLD lead, HOT lead, Shield. The facing side of the VCAP
circuit board is labeled accordingly.
3. Turn over the barrier-strip plug and insert it into the socket in the VCAP level control.
4. Trap the cable under a wire tie inserted into the holes in the board as shown. Wire-tie
holes are also provided on 4-VCAP panels.
Figure 3.1 Wiring the
VCAP Level Control to the
VCA-MC Module
VCAP Level Control to the
VCA-MC Module