Satellite Array Procedures - Bose 3-2-1GS Series II Service Manual

4. Air Leak Test
4.1 Apply a 45Hz, 2.0 Vrms sine wave to the
Left analog input on the system test cable.
4.2 Listen for air leaks around all cabinet
seams, joints and wire harness thru-holes.
Air leaks will be heard as a hissing or sput-
tering noise. Test duration should be 5
seconds minimum. Repair any air leaks. All
repairs must be hidden.
5. Frequency Sweep Test
5.1 Apply a 2.0 Vrms, 10 Hz signal into the
right analog input on the system test cable.
5.2 Sweep the input frequency from 10 Hz
to 500 Hz. Listen for any extraneous noises
such as buzzes, rattles, ticks, port noise or
distortion.
6. Array Amplifier and Control Signal Tests
6.1 Transmit the smartspeaker SET MAIN
ATTENUATION message to set the attenua-
tion to 36 counts (0-100): 0x02 0x00 0x24
0x26
PASS: Speaker responds 0x00.
6.2 Apply a 2Vrms,1000 Hz ±1% sine wave
in both left and right analog input positive
terminals, J3.9 and J3.12. Ground the left
and right analog input negative terminals,
J3.8 and J3.10.
PASS: The voltage across the array amplifier
loads lie within the following ranges:
LC, RC: 2.0 to 2.9 Vrms
LS, RS: 1.2 to 1.8 Vrms
6.3 Short the SPKR-SENSE input (J4.3) to
the Shell of J4.
PASS: The voltage across the center array
amplifier loads exceed the following values:
LC, RC > 3.0 Vrms
TEST PROCEDURES
63
6.4 Select the S/PDIF input by transmitting
the following "SOURCE TYPE" message:
0x0D 0x00 0x03 0x0E
PASS: Speaker responds 0x00.
(There is no need to repeat the "STREAM
METADATA" message.)
6.5 Apply a -6dB peak value,1 kHz ± 1%
PCM stream in both left and right samples of
a S/PDIF signal connected differentially to
the system test cable SPDIF input.
PASS: The voltage across the center array
amplifier loads exceed the following values:
LC, RC: > 3.0 Vrms
6.6 Apply 3.3 vdc to CONSOLE-MUTE and
wait 500msec.
PASS: The voltage across the array amplifier
loads are < 10 mVrms.
6.7 Open CONSOLE-MUTE.
PASS: The voltage across the array amplifier
loads are > 3.0Vrms.

Satellite Array Procedures

Notes:
• The standard 3•2•1 Series II satellite arrays
are non-repairable. The grilles can be re-
placed using the disassembly/assembly
procedures.
The 3•2•1GS Series II satellite arrays are
repairable. Refer to the disassembly proce-
dures in the service manual.
• Each satellite array contains two identical
drivers that are wired independently. You
must test each of them separately unless
otherwise specified.
1. DC Resistance Test
1.1 Using a DMM, measure the DC resis-
tance of each of the array drivers. Each
should measure 3.2 Ohms + 10%.