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11. Woofer Power Output Test

NOTE: Use the same test setup as Procedure

9,except remove the dB meter.

A. Connect a voltmeter across the 4

load.

NOTE: These measurements can be obtained at

120 and 240 V. Results will vary depending on the

line voltage used.

B. Adjust the oscillator to 100 Hz,555 mVrms.

C. Measure the voltage across the load. It should

be approximately 20.0 volts (100 watts). The

signal should look undistorted when viewed on an

oscilloscope.

Complete System Tests

NOTE: Use these procedures when a complete

FreeSpace™ business music system (module and

satellites) comes in to be serviced. All procedures

listed under Bass Module Test Procedures can

be used to test a complete system except as

indicated below.

1. System Phase Test

A. Use the procedures already listed for the

satellites and the module. Use Procedure #2

under Satellite Test Procedures and Procedure

#10 under Bass Module Test Procedures.

2. System Sweep Test

A. Use the procedures already given for the

satellites and the module,except use 185 mVrms

for both parts of the test. Use Procedure #1 under

Satellite Test Procedures and Procedure #1

Ω

resistive

under Bass Module Test Procedures. Make sure

that the satellites are connected to the bass

module.

3. Volume Control Test

A. Connect an oscillator to the module's L/R audio

input terminals. Adjust the oscillator to 4 kHz,185

mVrms.

B. Connect a set of satellites to either the 2 left or

the 2 right channels.

C. Attach the remote volume control to the

positive (+) and negative (-) volume control

terminals. At the 0 volume setting,the audio signal

should be faint or nonexistent,and at the

maximum volume setting,the audio signal should

be loud.

D. If there is no remote volume

control,momentarily short across the positive (+)

and negative (-) volume control terminals. The

signal should be faint or nonexistent.