64
TEST PROCEDURE
System Setup
To connect to the FreeSpace
®
4400 system you must first have the FreeSpace Installer software
installed on your PC.
Note: The FreeSpace 4400 ships with the Installer
TM
software CD included in the carton. If you
do not have access to the software CD, you can download this software from the Bose Profes-
sional Products web site at http://www.pro.bose.com. Click on the Products pull down menu,
scroll down to the FreeSpace 4400 Business Music System link and click on it. On that page
you will see links for the FreeSpace Installer software and for the latest host microcode.
•
Connect the RS-232 serial data COM port of your PC to the RS-232 serial port on the rear
panel of the 4400 amplifier using an RS-232 DB9 connector serial cable. Ensure that the PC
used for testing is connected to the unit under test via an active COM port. Configure the PC
COM port as listed below.
Baud Rate:
57.6K
Word size:
8 bits
Parity:
none
Stop Bits:
one
Test Procedures
1. Speaker Output Relay Test
1.1 With the unit disconnected from AC mains and the power switch in the OFF position, use an
Ohmmeter to measure a short across the output relays for all four amplifier outputs. Measure at
the following points:
Zone 1 speaker output – Measure zero ohms from Ch 1 pin 1 to pin 2
Zone 2 speaker output – Measure zero ohms from Ch 2 pin 1 to pin 2
Zone 3 speaker output – Measure zero ohms from Ch 3 pin 1 to pin 2
Zone 4 speaker output – Measure zero ohms from Ch 4 pin 1 to pin 2
2. Front Panel LED Test
2.1 Connect the unit under test to AC mains. Turn the unit ON by pressing the standby switch
on the front panel. Verify that the unit turns on.
2.2 Once you have turned the unit ON above, verify that the “System Status” LED and the four
“amp status” LED’s are illuminated green. Verify that all other LED’s are off. This verifies that the
unit has passed its own power-on-self-test.
3. Wall Plate Connector Test
This test measures the voltage at the wallplate connectors. Using a multimeter, measure the DC
voltage from pins 1 to 8 for the four connectors sequentially.
3.1 Measure the +5VDC on each of the connectors from pins 1 to 8. Verify that the DC voltage
is in accordance with the table on the next page.
Summary of Contents for FREESPACE 4400
Page 87: ...87 Circuit Board Layout Diagrams Figure 12 DSP PCB Top Etch Board Layout Diagram ...
Page 88: ...88 Circuit Board Layout Diagrams Figure 13 DSP PCB Bottom Etch Board Layout Diagram ...
Page 90: ...90 Circuit Board Layout Diagrams Figure 18 Amplifier Upper PCB Top Etch Board Layout Diagram ...
