Bose FreeSpace IZA 2120-HZ Service Manual

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TEST PROCEDURES
Hi-Pot Test
THIS IS A MANDATORY TEST
Note: If an the unit under test requires disassembly as part of the repair, it MUST be Hi-Pot
tested before being returned to the customer to ensure that there is no potential shock hazard.
This test requires a Hi-Pot tester with a ground bond attachment to perform this test.
Connections:
The Hi-Pot tester connects to the unit under test (UUT) by means of a wiring harness. The
AC line cord of the UUT plugs into the Hi-Pot tester AC adapter box. The return line connects to
all output connectors.
Hi-Pot Tester Settings:
AC Input to Earthed Parts
All units - 1500 VAC, rise time = 1 sec., dwell = 3 seconds, current limit = 5.0 mA
• Connect the AC mains cord to loudspeaker under test. Plug the other end of the AC cord
into the Hi-Pot tester AC adapter box. The AC adapter box connects to the High Voltage (HV)
connection on the Hi-Pot tester.
• Connect the Hi-Pot tester RETURN line to a ground point on the chassis.
• With the tester set to the above parameters, perform the test. If the unit fails, troubleshoot it
and repair the problem. If it passes this portion of the test, proceed to the below test.
AC Input to Output Connectors
All units - 2500 VAC, rise time = 1 sec., dwell = 3 seconds, current limit = 5.0 mA
• Connect the AC mains cord to loudspeaker under test. Plug the other end of the AC cord
into the Hi-Pot tester AC adapter box. The AC adapter box connects to the High Voltage (HV)
connection on the Hi-Pot tester.
• Connect the Hi-Pot tester RETURN line to all output connectors.
• With the tester set to the above parameters, perform the test. If the unit fails, troubleshoot it
and repair the problem. Once the unit is repaired, repeat the Hi-Pot and the ground bond
test to ensure the unit is safe to return to the customer.
Ground Bond Test
Note: This test only needs to be performed if the chassis ground wire from the AC IEC
connector to the inside of the chassis of the unit has been removed or disturbed as part of a
repair. If it has not, this test does not need to be performed. This test measures current handling
capability between the ground blade on the AC inlet or mains plug and the earth bond point on
the chassis of the unit.
Ground Bond Tester Settings:
10A, < 12VAC open circuit, < 0.1 Ohms from AC earth terminal on IEC connector in chassis, to
earth bond point on rear of chassis. Test duration = 3 seconds.
• Connect the AC mains cord to the back of the amplifier under test. Plug the other end of
the AC cord into the ground bond test box.
• With the tester set to the above parameters, perform the test. If the unit fails, remove the top
cover and repair the problem. Once the unit is repaired, repeat the Hi-Pot and the ground
bond tests to ensure the unit is safe to return to the customer.

Bose FreeSpace IZA 2120-HZ Specifications

General

Maximum current	5 A
AC input voltage	230 V
AC input frequency	50 Hz
Amplifier class	D
Frequency range	55 - 20000 Hz
Audio output channels	2.0 channels
Peak power per channel	- W
Total Harmonic Distortion (THD)	0.3 %
Purpose	Performance/stage
Equalizer	Yes
Product color	Silver
Volume control	Rotary
Connectivity technology	Wired
Line inputs (RCA)	2
Speakers connectivity type	RCA
Package weight	5400 g

Weight and Dimensions

Depth	324 mm
Width	483 mm
Height	44 mm
Weight	4100 g