Bose BUILT-INvisible TA-1 Service Manual page 29

11. DSP Board Tests
Note: These tests will verify that the DSP
board is working properly.
Note: If you are performing these tests
using a Digital BUILT-INvisible
you will not be able to perform tests 11.24
(1:5 Toggle), 11.27 (DRC Toggle) or 11.30
(FEQ Toggle) as these functions are not
incorporated into the remote control. In order
to perform these tests you need to use either
a programmable remote such as the Philips
Pronto, or TAP commands to emulate the IR
commands as listed in the procedures.
Note: The TA-1 uses 1.5 dB gain steps
between 0 and 9 dB and 1 dB steps between
0 and -6 dB.
11.1 Setup the unit under test as listed in the
Test Setup Parameters. Connect the TA-1
amplifier to an IBM compatible PC using the
TAP cable described in the appendix. Set up
a hyperterminal session as listed in the
appendix.
11.2 Set the TA-1 amplifier bass and treble
controls to the center position using the TAP
commands IDA and IB2.
11.3 Enter the following TAP commands and
check the TA-1 amplifier for the correct
response from the TA-1 amplifier.
11.4 Apply a 100 mV, 1 kHz signal to the left
and right music audio inputs at J6.
11.5 Reference a dB meter to the left front
satellite speaker output at J12 pins 3 and 4.
11.6 On the IBM PC, issue one VOLUME
UP command (IC0). Confirm that the output
volume level has been raised 1 dB.
11.7 Issue one VOLUME DOWN command
(I40). Confirm that the output volume level
has decreased 1 dB.
TEST PROCEDURES
®
IR remote,
29
11.8 Issue one 5 SPEAKER mode com-
mand (I38). Confirm that the TA-1 amplifier is
now in 5 channel mode.
11.9 Issue one SURROUND UP command
(ID0). Confirm that the surround volume has
been raised either 1 or 1.5 dB.
11.10 Issue one SURROUND DOWN
command (I50). Confirm that the surround
volume has decreased either 1 or 1.5 dB.
11.12 Issue one 3 SPEAKER mode com-
mand (IF2). Confirm that the unit is now in 3
channel mode.
11.13 Issue one CENTER UP command
(I90). Confirm that the center volume has
been raised either 1 or 1.5 dB.
11.14 Issue one CENTER DOWN command
(I10). Confirm that the center volume has
decreased either 1 or 1.5 dB.
11.15 Issue one STEREO command (ID2).
Confirm that the unit is now in 2 channel
(stereo) mode.
11.16 Issue one BASS UP command (I7A).
Confirm that the bass volume has increased
one increment.
11.17 Issue one BASS DOWN command
(IFA). Confirm that the bass volume has
decreased one increment.
11.18 Issue one BASS MIDDLE command
(IDA). Confirm that the bass volume is in the
center of the range.
11.19 Issue one TREBLE UP command
(I0A). Confirm that the treble volume has
increased one increment.
11.20 Issue one TREBLE DOWN command
(I8A). Confirm that the treble volume has
decreased one increment.
11.21 Issue one TREBLE MIDDLE com-
mand (IB2). Confirm that the treble volume is
in the center of the range.