Bose Acoustimass 3 Series 서비스 매뉴얼 - 페이지 23

{카테고리_이름} Bose Acoustimass 3 Series에 대한 서비스 매뉴얼을 온라인으로 검색하거나 PDF를 다운로드하세요. Bose Acoustimass 3 Series 42 페이지. Powered speaker system
Bose Acoustimass 3 Series에 대해서도 마찬가지입니다: 소유자 매뉴얼 (17 페이지), 소유자 매뉴얼 (10 페이지), 매뉴얼 (43 페이지)

페이지 인쇄

Frequency

20 Hz

55 Hz

100 Hz

200 Hz

400 Hz

11. Bass Channel Dynamic EQ Gain

NOTE: Use the same test setup as Procedure 10.

A. Adjust the oscillator to 100 Hz,30 mVrms. Use

this as a reference point.

B. Adjust the oscillator to 55 Hz. There should be

a boost of approximately 5 dB. (a 3.0 dB

dB difference between the 30mV and the 200 mV

input level). Refer to the chart in the previous

procedure.

12. Woofer Power Output Test

NOTE: Use the same test setup as Procedure

10,except remove the dB meter. Make sure that

any test equipment connected to the woofer

output is floated (or isolated from ground).

Ω

A. Connect a 5

resistive load to the woofer

output. Connect a voltmeter across the load.

NOTE: These measurements can be obtained at

120 and 240 V. Results will vary depending on the

line voltage used.

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

input terminals. Adjust the oscillator to 100 Hz,345

mVrms.

Relative Response

-18.0 dB ± 2.0 dB

+1.8 dB ± 1.5 dB

0 dB

-0.5 dB ± 1.5 dB

-10.7 dB ± 1.5 dB

1.0

C. Measure the voltage across the load. It should

be approximately 15.8 volts (50 watts). The signal

should look undistorted when viewed on an

oscilloscope.

Complete System Tests

NOTE: Use these procedures when a complete

AM-3P system (module and satellites) comes in to

be serviced.

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

#9 under Module Test Procedures.

2. System Sweep Test

A. Use the procedures already given for the

satellites and the module,except use 220 mVrms

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

Satellite Test Procedures and Procedure #2

under Module Test Procedures. Make sure that

the satellites are connected to the bass module.

3. All Other Tests

A. All other tests listed under Module Test

Procedures can be used to test a complete

system.