Service Manuals, User Guides, Schematic Diagrams or docs for : BOSE Audio AV-3-2-1 SM TG_pages23-39

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Composite
Video
or S-Video
Monitor
input
Audio Signal
Generator

Figure 2. 321 Console Test Setup Diagram
SPDIF converter
dB meter
Audio,
Optical converter SPDIF
Audio output
or Optical
input

23
IBM
compatible
+15V PC
Console DC power
test cable 3-2-1 Console
TAP cable
DC power
supply RF input
RF Signal
Generator
Audio signal
generator

Bass
module Distortion
test cable meter

dB meter
Bass Module

AC mains cable

Figure 3. 321 Bass Module Test Setup Diagram

Driver 1 + terminal Driver 2 + terminal

Driver 1 - terminal Driver 2 - terminal

Figure 4. 321 and 321 GS Satellite Speaker Wiring Diagram
24
TEST PROCEDURES
Console Procedures 2.2 Connect the output of the S/PDIF con-
verter to the VIDEO 1 coaxial digital input.
CAUTION: The DVD drive mechanism should
not be closed by pushing it shut with no power 2.3 Apply a 500 mV, 1 kHz signal to the
applied to the console. Doing so could damage analog input of the S/PDIF converter.
the drive. It must be closed with power applied
so that the locking mechanism inside the drive 2.4 On the console, select the VIDEO 1
will engage properly when the drawer is source.
closed.
2.5 Measure the output level at the line
Equipment required: outputs on the console rear panel. It should
be 300 mVrms + 10%.
Audio signal generator
Digital multimeter 2.6 Repeat steps 3.1 to 3.5 for the VIDEO 2
Analog to S/PDIF converter digital coaxial input.
S/PDIF to optical converter
AM/FM signal generator 2.7 Repeat steps 3.1 to 3.5 for the AUX
Video signal generator or DVD player digital coaxial input.
Abex test DVD (TDV-540A)
Video monitor 3. Optical Digital Audio Test
DC power supply or bass module w/cable
Composite Video cable 3.1 Connect the audio signal generator to
S-Video cable the input of the analog to S/PDIF converter.
Optical cable
3.2 Connect the output of the S/PDIF con-
Test Setup verter to the input of the S/PDIF to optical
converter.
Set up the unit under test as shown in
Figure 2 for the following tests. 3.3 Connect the output of the optical con-
verter to the VIDEO 1 optical input.
1. Analog Audio Test
3.4 Apply a 250 mV, 1 kHz signal to the
1.1 Apply a 1 Vrms, 1 kHz signal to the left analog input of the S/PDIF converter.
and right VIDEO 1 audio analog inputs.
3.5 On the console, select the VIDEO 1
1.2 On the console, select the VIDEO 1 source.
input.
3.6 Measure the output level at the line
1.3 Measure the output level at the audio outputs on the console rear panel. It should
outputs on the console rear panel. It should be 150 mVrms + 10%.
be 470 mVrms + 10%.
4. Video Tests
1.4 Repeat steps 1.1 to 1.3 for the VIDEO 2
and AUX audio analog inputs. 4.1 Connect the video generator or DVD
player to the COMPOSITE VIDEO INPUT
2. Coaxial Digital Audio Test only.

2.1 Connect the audio signal generator to 4.2 Connect the video monitor to the COM-
the input of the analog to S/PDIF converter. POSITE VIDEO OUTPUT.

25
TEST PROCEDURES
4.3 Set the video generator to display a test 6.3 On the 3-2-1 system remote control,
pattern. If using a DVD player, load a DVD press the CD/DVD button to start playback
disc into the tray and start playback. of the DVD disc.

4.4 On the console, select the VIDEO 1 6.4 Verify that the audio plays.
source.
7. CD Playability Tests
4.5 Confirm that the test pattern or DVD
video appears on the video monitor and that Test discs required:
there are no obvious video problems. ABEX TCD-714R
ABEX TCD-721R
4.6 Connect the video generator or DVD ABEX TCD-725R
player to the S-VIDEO input only. ABEX TCD-732R
Philips TS4
4.7 Connect the video monitor to the
S-VIDEO output. 7.1 Insert the ABEX TCD-725R test disc
into the console CD/DVD tray.
4.8 Set the video generator to display a test

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