Test Procedures - Bose FreeSpace Business E4 II Series Service Manual

System Setup
To connect to the FreeSpace
software installed on your PC.
Note: The E4 Series II ships with the Installer software CD included in the carton. If you do not
have access to the software CD, you can download this software from the Bose Professional
Products web site at http://www.pro.bose.com. Click on Products, scroll down to the Discontin-
ued Products link and click on it. On that page you will see links for the FreeSpace Installer
version 2.0 software.
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Connect the RS-232 serial data COM port of your PC to the RS-232 serial port on the rear
panel of the E4 II 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 outputs" 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.
TEST PROCEDURE
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E4 Series II system you must first have the FreeSpace Installer
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