Bose FREESPACE BUSINESS Service-Handbuch - Seite 12

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Bose FREESPACE BUSINESS Service-Handbuch

Test Set-Up parameters

Switches
All switches shall be set to their right
hand position. (Looking at the back of
unit)
Potentiometer
Page level should be fully clockwise.
Input Connections
Connect the positive (+) side of an oscilla-
tor to the positive input terminals. Connect
the negative (-) side to the negative (-) and
common input terminals. Do this for Chan-
nels A, B and Page, using the quick con-
nectors supplied in connector kit 180095..
Output Connections
Connect the positive (+) side of test equip-
ment to the positive (+) output terminals.
Connect the negative (-) side to the nega-
tive (-) and common output terminals.Do
this for channel A and B using the quick
connectors supplied in connector kit
180095.
All test equipment should be balanced or
isolated from ground (floated).
Voltage Selection/ Fuse Location
Using a screw driver, remove the voltage
switch located under the AC plug. Slide the
card out from the assembly, rotate and
reinsert. Selected voltage will appear in
window. The fuse is located in the card.
See parts list note three.

TEST PROCEDURES

1. Output level
2. Frequency Response
12
1.1 Apply a 2 Vrms, 1 KHz signal to
Channel A and B input.
1.2 Reference a dB meter to the applied
signal.
1.3 Measure the output level according to
the chart below.
O u t p u t
Min
Line
-5.3
Model 32
-17.5
Model 8
-18.9
2.1 Apply a 2Vrms, 1 KHz signal to chan-
nel A and B input.
2.2 Reference a dB meter to the output A
or B.
2.3 Measure the output level according to
the chart below.
F r e q
Min
Max
1 KHz
0
0
50 Hz
+0.2
15 KHz
+0.2
1 KHz
0
0
50 Hz
+3.0
90 Hz
+11.0 +13.0
4 KHz
+6.2
+8.2
12 KHz
14.0
+16.0
15 KHz
+16.0
1KHz
0
0
50 Hz
-10.5
100 Hz
+10.0 +12.0
4 KHz
+5.8
+7.8
10 KHz +11.3 +13.3
15 KHz
+9.7
Max
Unit
-3.3
dBr
-15.5
dBr
-16.9
dBr
Unit
O u t p u t
R e f
d B r
l i n e
d B r
R e f
d B r
d B r
Model 32
d B r
d B r
d B r
R e f
d B r
d B r
Model 8
d B r
d B r
d B r