Test Procedures - Bose 802C Service Manual

1. Mode Indicator Test
1.1 Depending on the output jack configu-
ration (see top cover diagram on page 17),
equalization curves and output vary. You
must test all modes of the 802C to assure
proper operation.
1.2 Perform the test below to verify that the
mode select operation is working properly.
Note: You can insert one or both of the
output jacks into the unit for this test.
LED Indicator Status
Output 802
Jacks Full
Inserted Range
No Jacks O n
Inserted
Inserted into O n
802 AMP
Inserted into Off
302 AMP
Inserted into Off
802 and 302
AMP
2. 802 Full Range Frequency Response
2.1 Apply a 750Hz, 500mVrms signal to
the input of the 802C.
2.2 Reference a dB meter to the 802 AMP
output jacks.
2.3 Refer to the frequency response table
below and verify the response of the unit.
Full Range Frequence Response Table
Frequency Output
55Hz +14.0dB
30Hz 0dB
250Hz +2.7dB
750Hz 0dB
(reference)
3kHz +2.3dB
7.5kHz +12.0dB
15kHz +16.9dB

TEST PROCEDURES

Passive Bi-
2-Way AMP
Off Off
Off Off
O n Off
Off O n
Tolerance
± 1.5dB
± 2.5dB
± 1.2dB
-
± 1.5dB
± 1.5dB
± 1.8dB
Note: Set both the Lo and Hi cut switches
IN for the following response table.
Lo and Hi Cut Switch Response Table
Frequency Output
55Hz +9.3dB
750Hz 0dB
(reference)
15kHz +6.9dB
3. 302 Passive Frequency Response
3.1 Apply a 750Hz, 500mVrms signal to
the input of the 802C.
3.2 Reference a dB meter to the 302 AMP
output jacks.
3.3 Refer to the frequency response table
below and verify the response of the unit.
Passive Frequency Response Table
Frequency Output
30Hz -8.8dB
55Hz +6.2dB
150Hz -3.2dB
250Hz +3.2dB
750Hz 0 dB
(reference)
3kHz 0.9dB
15kHz +15.3dB
4. Bi-Amp Frequency Response
Note: This test is performed with both the
802 AMP and the 302 AMP output jacks
used at the same time.
4.1 Apply a 750Hz, 500mVrms signal to
the input of the 802C.
4.2 Reference a dB meter to the 802 AMP
output jacks (while in the Bi-Amp mode).
4.3 Refer to the frequency response table
below and verify the response of the unit.
802 Bi-Amp Frequency Response Table
Frequency Output
55Hz -20.1dB
230Hz +2.6dB
750Hz 0 dB
(reference)
15kHz +17.0dB
9
Tolerance
± 1.8dB
-
± 2.0dB
Tolerance
± 2.5dB
± 1.5dB
± 1.5dB
± 1.8dB
-
± 1.5dB
± 1.8dB
Tolerance
± 2.5dB
± 1.8dB
-
± 1.8dB