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Bose 3-2-1 Service Manual

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    							21
    Preliminary
    
    
    
    22. FM Stereo & Force Mono Threshold
    22.1 Inject a 98.1MHz RF (83.0 MHz for
    Japan) signal set to 1kHz stereo L=-R
    modulation with 10% pilot modulation and
    75 kHz total deviation at a level of 42 dBf
    into J2000.
    22.2 Enter the command TUSF09810
    (TUSF08300 for Japan) into the computer.
    This will tune the unit to the appropriate
    frequency.
    22.3 Enter the command TUSR. The unit will
    then sample the FM S-meter level, and store
    it in the EEPROM as the stereo level.
    Enter the command TURS to see the stored
    level; the response on the computer should
    be as follows: XX (where XX is the stored
    level in hexadecimal form).
    22.4 Reduce the RF signal level by 2dB.
    22.5 Enter the command TUSM. The unit will
    then sample the FM S-meter level, and store
    it in the EEPROM as the force-mono level.
    Enter the command TUMS to see the stored
    level; the response on the computer should
    be as follows: XX (where XX is the stored
    level in hexadecimal form).
    FM S-meter voltage levels for each of these
    settings can be calculated as per the stops
    level.
    23. FM Signal to Noise Ratio
    23.1 Set the RF signal generator to 98.1
    MHz, 1 kHz modulation, pilot off, 75 kHz
    deviation and at the level that corresponds to
    65 dBf into J2000.
    23.2 Measure the output level at the left or
    right audio output. Reference a dB meter to
    this level.
    23.3 Turn off the RF modulation and verify
    that the level drops by > 70 dB.  Bass Module Procedures
    Equipment  required:
    • Audio signal generator
    • dB Meter
    • Distortion meter
    • Digital multimeter
    • 2 Ohm, 50 Watt load resistor
    • 60 Ohm, 10 Watt load resistor
    • Bass module test cable (see instructions
      in the appendix)
    Test Setup
    Refer to Figure x for the following tests.
    1. Unpowered Transformer Impedance Test
    1.1 On the bass module, set the AC mains
    switch to the ON position (if applicable). For
    the International variation, set the voltage
    select switch to 120V.
    1.2 Using a DMM, measure the DC resis-
    tance of the transformer primary through the
    AC connector J1. For the international
    version, first measure with the voltage select
    switch set to 115V, then move the switch to
    230V and measure again. Verify that the
    readings are in accordance with the following
    table.
    2. Woofer DC Resistance Test
    2.1 Remove the bass module rear enclosure
    using  bass  module  disassembly/assembly
    procedure 1.
    2.2 Remove the woofer harness from J7 on
    the bass module PCB. Measure the DC
    resistance of the woofer voice coil by mea-
    suring across the two pins of the woofer
    harness. It should be 1.55 Ohms 
    + 15%.
    US/Canada 3.7 Ohms +/- 15%
    Europe 14.0 Ohms +/- 15%
    Japan 2.8 Ohms +/- 15%
    International 3.7 Ohms +/- 15% (115V)
    14.0 Ohms +/- 15% (230V) 
    						
    							22
    Preliminary
    
    
    
    3. Power Up Test
    3.1 Apply a short across BASS-EQ (J6 pin
    6) and AGND (J6 pin 5). Apply 0 V to MUTE
    (J6 pin 13).
    3.2 Apply AC mains voltage to the bass
    module.
    3.3 Measure the transformer quiescent
    primary current. It should be < 250 mArms.
    3.4 Measure the V supply voltage at J6 pins
    7, 8, 14 and 15. It should be +16.5 
    + 1.0
    VDC. Remove the short applied in step 3.1.
    3.5 Measure the J7 speaker output DC
    potential on each pin of the connector rela-
    tive to PGND at J6 pin 2 or 3. It should be
    + 8.2 
    + 1.0 Vdc.
    4. Gain, Distortion and Mute Tests
    4.1 Connect a 2 Ohm, 50 Watt load resistor
    to the bass channel output to J7 on the bass
    module PCB.
    4.2 Apply a +5 Vdc level to MUTE at J6 pin
    13. This DC level will unmute the bass
    module amplifier.
    4.3 Apply a 100 mV, 100 Hz signal between
    BASS-EQ (J6 pin 6) and AGND (J6 pin 5).
    4.4 Reference a dB meter to the input level.
    4.5 Measure the output gain level at J7.
    It should be +26.0 dB 
    + 2.0 dB.
    4.6 Measure the distortion level at J7.
    It should be < 0.1%.
    4.7 Apply a 0 Vdc level to MUTE at J6 pin 13.
    This DC level will mute the bass module
    amplifier.
    4.8 Measure the mute attenuation level at J7
    relative to the input level. It should be > 40
    dB.5. Clipping Detect Test
    5.1 Remove the bass module rear enclosure
    using  bass  module  disassembly/assembly
    procedure 1.
    5.2 Unplug the woofer harness connector at
    J7 on the bass module PCB. Connect a
    60 Ohm, 10 Watt load resistor to J7 on the
    bass module PCB.
    5.3 Apply a +5 VDC level to the bass mod-
    ule MUTE input at J6 pin 13. This DC level
    will unmute the bass module amplifier.
    5.4 Apply a 1.0 Vrms, 100 Hz signal bet-
    ween BASS-EQ (J6 pin 6) and AGND
    (J6 pin 5).
    5.5 Using a DMM, measure the average
    voltage of the digital clipping detect signal
    COMP (J6 pin 12). It should be +1.7 
    + 1.0
    Vdc.
    5.6 Remove the + 5.0 Vdc level applied to
    MUTE at J6 pin 13.
    5.7 Using a DMM, measure the average
    voltage of the digital clipping detect signal
    COMP (J6 pin 12). It should be +5.0 
    + 0.5
    Vdc.
    5.8 Re-connect the woofer harness to J7 on
    the bass module PCB.
    6. Air Leak Test
    6.1 Apply a 200 mVrms, 45 Hz signal
    between BASS-EQ (J6 pin 6) and AGND
    (J6 pin 5).
    6.2 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. Repair any air leaks. All repairs
    must be hidden. 
    						
    							23
    Preliminary
    
    
    
    7. Frequency Sweep Test
    7.1 Apply a 350 mVrms, 10 Hz signal be-
    tween BASS-EQ (J6 pin 6) and AGND
    (J6 pin 5).
    7.2 Sweep the input frequency from 10 Hz
    to 500 Hz. Listen for any extraneous noises
    such  as  buzzes,  rattles,  ticks,  port  noise  or
    distortion.
      Satellite Array Procedures
    Notes:
    • Refer to Figure x for the following
       procedures.
    • The satellite arrays are non-repairable.
       The grilles can be replaced using the
       disassembly/assembly procedures.
    • 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 digital multi-meter, measure the
    DC resistance of each of the array drivers.
    Each should measure 3.2 Ohms 
    + 10%.
    2. Phase Test
    2.1 Remove the array grille using Array
    disassembly/assembly  procedure  1.
    2.2 Observing polarity, apply a +6 Vdc level
    to one driver on the array input connector.
    2.3 Observe the driver under test. When the
    DC level is applied, the driver should move
    outward. If it does, the driver is wired cor-
    rectly. If not, it is wired incorrectly. Repeat
    steps 2.2 and 2.3 for the other driver in the
    array.3. Air Leak Test
    3.1 Apply a 180 Hz, 3 Vrms signal to one of
    the drivers in the satellite array for 5 seconds
    minimum.
    3.2 Listen for air leaks around all enclosure
    seams, joints and the input connector. Air
    leaks will be heard as a hissing or sputtering
    noise. Repair any air leaks. All repairs must
    be hidden.
    3.3 Listen for any rubbing or ticking noise
    from the driver. Replace any driver that is
    defective.
    Note: There is a normal suspension noise.
    To distinguish between a rub or tick and
    suspension noise, displace the cone slightly
    with your finger.
    If the rubbing can be made to go away or get
    worse, then it is a rub or tick. If the noise
    stays the same, it is suspension noise.
    3.4 Repeat steps 3.1 to 3.3 for the other
    driver in the array.
    4. Frequency Sweep Test
    4.1 Jumper both of the drivers in a single
    array together. Both center pins of the array
    connector are negative (-). The two outer
    pins are the positive (+) pins.
    4.2 Apply a 100 Hz, 3.0 Vrms signal to both
    of the array drivers.
    4.3 Slowly sweep the signal generator from
    100 Hz to 2.0 kHz. Listen for any extraneous
    noises  such  as  buzzes,  rattles,  ticks,  port
    noise or distortion. Replace any array with
    an extraneous noise that can be heard at a
    distance greater than 1 foot (0.3m). 
    						
    							24
    Preliminary
    MAIN PART LIST
    Console Assembly (see Figure 5)
    Item
    NumberDescription Part
    NumberQty. Note
    1 LABEL, TOP COVER, GRAPHITE
    LABEL, TOP COVER, PLAT WHT256946-001
    256946-0021
    2 COVER, CONSOLE, DVD, GRAPHITE
    COVER, CONSOLE, DVD, PLAT WHT264482-001
    264482-0021
    3 STRAP, DVD, (CLAMP) 260462 1
    4 SHIELD, FOIL, DVD, (ATAPI SHIELD) 260471-001 1
    5 DRIVE, DVD ROM 256150-001 1
    6 SCREW, M3 260463 2
    7 CABLE, POWER, DVD, 155 MM 256955-155 1
    8 CABLE, RIBBON, ATAPI, 40 POSITION 256954-090 1
    9 HEATSINK, MAIN 260281 1
    10 CABLE, FLEX, 172 MM, 24 CONDUCTOR 254584-172 1
    11 PAD, THERMAL PHASE CHANGE
    (CONSOLE AMPLIFIER IC)258627 1
    12 CLIP, HEATSINK 262080 1
    13 SCREW, TF, 8-11X.625", PAN, TORX 256947-10 9
    14 HEATSINK, BRACKET, DVD (CASTING) 256949 1
    15 GASKET, FOAM, EMI, 25MM 262635-025 5
    16 PAD, THERMAL, COMPLIANT, 25 x 25 MM 262078-001 1
    17 PAD, THERMAL, COMPLIANT, 9 x 7 MM 262078-002 1
    18 GASKET, FOAM, EMI, 3MM 262635-003 3
    19 PANEL, I/O, GRAPHITE
    PANEL, I/O, PLAT WHT262802-001
    262802-0021
    20 MAIN PCB ASSY, PROGRAMMED 263202-001 1 2, 4
    21 BASE, CONSOLE, GRAPHITE
    BASE, CONSOLE, PLAT WHT254547-001
    254547-0021
    22 SHIELD, LOWER 263026-001 1
    23 INSULATOR, SHIELD 263486-001 1
    24 FOOT, RUBBER, .50 DIA X.062 THK 260465 4
    25 STRAP, GROUND, FOIL, 25.4MMX105 MM 262634-105 1
    26 LCD DISPLAY PCB ASSY, PROGRAMMED 262309-001 1 2, 4
    27 BEZEL SUB ASSEMBLY 255127-001 1
    28 BEZEL, DRAWER, DVD 256957-001 1
    29 NAMEPLATE, 38 MM DIAMOND CUT 256945-001 1
    PART  LIST  NOTES
    1. This part is not normally available from Customer Service. Approval from the Field Service
        Manager is required before ordering.
    2. The individual parts located on the PCBs are listed in the Electrical Part List.
    3.           This part is critical for safety purposes. Failure to use a substitute replacement with the
        same safety characteristics as the recommended replacement part might create shock, fire
        and/or other hazards. 
    						
    							25
    Preliminary
    Figure 5. Console Exploded View
    1
    2
    3
    4
    5
    6
    7
    8
    9
    10 11
    12
    13
    14
    13
    15
    16
    1718
    19
    20
    21
    22
    24 25 26 27
    28
    29
    4x 23
    3x
    5x2x
    9x
    2x 
    						
    							26
    Preliminary
    MAIN PART LIST
    Bass Module Assembly (see Figure 6)
    1
    6 PLACES
    2 2 PLACES
    3
    4
    5
    6
    7 8
    9
    1011 4 PLACES
    4 PLACES 4 PLACES4 PLACES4 PLACES 2 PLACES
    Figure 6. Bass Module Assembly Exploded View
    Item
    NumberDescription Part
    NumberQty. Note
    1 SCREW, TAPP, 8-11X.5, PAN, ASY, SQ 250817-08 6
    2 GASKET, FOAM, .32”x12.0”x.125” 255202 2
    3 BRACKET-L, COVER, AMP 255179 2
    4 INSERT, BARBED, 10-32X20mm 145712-03 4
    5 VIBRATION MNT, DBL STUD, 8/10-32 263002-006 4
    6 NUT, HEX, 8-32, KEPS 118260-08 4
    7 TRANSFORMER, EI, 120V, 60HZ, NTC 258862-001 1
    8 ENCLOSURE, REAR, BASS MOD, GRAPHITE 255165-201 1
    ENCLOSURE, REAR, BASS MOD, PLAT WHT 255165-202
    9 SCREW, TT, 8-32X0.5, PAN, XREC/SQ 255191-08 4
    10 BASS BOX PCB/HEATSINK ASSY, US 255139-001 1 2
    11 SCREW, TAPP, 8-11x.75, PAN, XRC/SQ 172672-12 8 
    						
    							27
    Preliminary
    MAIN PART LIST
    Bass Module PCB Assembly (see Figure 7)
    Figure 7. Bass Module PCB Assembly Exploded View
    1
    2
    3
    456
    3 PLACES
    3 PLACES
    U1
    BR1
    Q1
    Item
    Numbe
    r
    Description Part
    NumberQty. Note
    1 HEATSINK, BASS MODULE 260093-001 1
    2 CLIP, SPRING 142864 1
    3 PAD, FOAM, .25”x.75”x.06” 255201 3
    4 PC BOARD ASSY, BASS BOX , NO HEATSINK 254575-001 1 2
    5 SCREW, M3.5X10MM, THD ROLL 140447-10 3
    6 CLIP, HEAT SINK, BASS BOX AMP 255174 1 
    						
    							28
    Preliminary
    ELECTRICAL  PART  LIST
    Resistors Console Main PCB Assembly
    Reference
    DesignatorDescription Part Number Note
    R1 33.2K, 0603, 1/10W, 1% 191465-3322
    R2 33.2K, 0603, 1/10W, 1% 191465-3322
    R3 6.04K, 0603, 1/10W, 1% 191465-6041
    R4 9.09K, 0603, 1/10W, 1% 191465-9091
    R5 10K, 0603, 1/10W, 1% 191465-1002
    R6 19.1K, 0603, 1/10W, 1% 191465-1912
    R11 22.1K, 0603, 1/10W, 1% 191465-2212
    R12 9.53K, 0603, 1/10W, 1% 191465-9531
    R14 1K, 0603, 1/10W, 1% 191465-1001
    R15 10K, 0603, 1/10W, 1% 191465-1002
    R27 51 OHMS, 0603, 1/10W, 5% 199403-510
    R32 4.7K, 0603, 1/10W, 5% 199403-472
    R33 4.7K, 0603, 1/10W, 5% 199403-472
    R36 4.7K, 0603, 1/10W, 5% 199403-472
    R89 33.2K, 0603, 1/10W, 1% 191465-3322
    R90 13.3K, 0603, 1/10W, 1% 191465-1332
    R91 10.2K, 0603, 1/10W, 1% 191465-1022
    R92 4.22K, 0603, 1/10W, 1% 191465-4221
    R93 13.3K, 0603, 1/10W, 1% 191465-1332
    R95 499 OHMS, 0603, 1/10W, 1% 191465-4990
    R96 10K, 0603, 1/10W, 5% 199403-103
    R98 1K, 0603, 1/10W, 1% 191465-1001
    R99 1K, 0603, 1/10W, 1% 191465-1001
    R100 1K, 0603, 1/10W, 1% 191465-1001
    R103 JUMPER, 0603 196042
    R114 JUMPER, 0603 196042
    R115 750 OHMS, 1206, 1/4W, 5% 124895-7515
    R116 750 OHMS, 1206, 1/4W, 5% 124895-7515
    R117 JUMPER, 0603 196042
    R118 100 OHMS, 0805, 1/10W, 5% 133626-1015
    R152 470K, 0603, 1/10W, 5% 199403-474
    R153 47K, 0603, 1/10W, 5% 199403-473
    R154 47K, 0603, 1/10W, 5% 199403-473
    R155 19.6K, 0603, 1/10W, 1% 191465-1962
    R156 19.6K, 0603, 1/10W, 1% 191465-1962
    R157 560 OHMS, 0603, 1/10W, 1% 191465-5600
    R158 560 OHMS, 0603, 1/10W, 1% 191465-5600
    R159 19.6K, 0603, 1/10W, 1% 191465-1962
    R160 19.6K, 0603, 1/10W, 1% 191465-1962
    R161 560 OHMS, 0603, 1/10W, 1% 191465-5600
    R162 19.6K, 0603, 1/10W, 1% 191465-1962
    R163 19.6K, 0603, 1/10W, 1% 191465-1962
    R164 560 OHMS, 0603, 1/10W, 1% 191465-5600
    R165 19.6K, 0603, 1/10W, 1% 191465-1962
    R166 19.6K, 0603, 1/10W, 1% 191465-1962
    R167 10K, 0603, 1/10W, 1% 191465-1002 
    						
    							29
    Preliminary
    ELECTRICAL  PART  LIST
    Resistors Console Main PCB Assembly
    Reference
    DesignatorDescription Part Number Note
    R168 10K, 0603, 1/10W, 1% 191465-1002
    R169 10K, 0603, 1/10W, 1% 191465-1002
    R170 10K, 0603, 1/10W, 1% 191465-1002
    R171 1K, 0603, 1/10W, 5% 199403-102
    R172 1K, 0603, 1/10W, 5% 199403-102
    R173 10.0K, 0805, 1/10W, 5% 133626-1035
    R175 10.0K, 0805, 1/10W, 5% 133626-1035
    R196 19.6K, 0603, 1/10W, 1% 191465-1962
    R197 19.6K, 0603, 1/10W, 1% 191465-1962
    R198 19.6K, 0603, 1/10W, 1% 191465-1962
    R199 19.6K, 0603, 1/10W, 1% 191465-1962
    R200 19.6K, 0603, 1/10W, 1% 191465-1962
    R201 19.6K, 0603, 1/10W, 1% 191465-1962
    R202 19.6K, 0603, 1/10W, 1% 191465-1962
    R203 19.6K, 0603, 1/10W, 1% 191465-1962
    R204 100 OHMS, 0603, 1/10W, 5% 199403-101
    R205 100 OHMS, 0603, 1/10W, 5% 199403-101
    R206 JUMPER, 0805 133627
    R1000 100K, 0603, 1/10W, 5% 199403-104
    R1001 100K, 0603, 1/10W, 5% 199403-104
    R1002 100K, 0603, 1/10W, 5% 199403-104
    R1004 100K, 0603, 1/10W, 5% 199403-104
    R1005 100K, 0603, 1/10W, 5% 199403-104
    R1006 100K, 0603, 1/10W, 5% 199403-104
    R1008 560 OHMS, 0603, 1/10W, 5% 199403-561
    R1009 560 OHMS, 0603, 1/10W, 5% 199403-561
    R1010 1.00K, 0805, 1/10W, 5% 133626-1025
    R1011 4.7K, 0603, 1/10W, 5% 199403-472
    R1012 4.7K, 0603, 1/10W, 5% 199403-472
    R1015 100K, 0603, 1/10W, 5% 199403-104
    R1016 100K, 0603, 1/10W, 5% 199403-104
    R1017 1.00K, 0805, 1/10W, 1% 133625-1001
    R1018 1.00K, 0805, 1/10W, 1% 133625-1001
    R1019 1.00K, 0805, 1/10W, 5% 133626-1025
    R1020 1.00K, 0805, 1/10W, 5% 133626-1025
    R1021 1.00K, 0805, 1/10W, 5% 133626-1025
    R1023 1.00K, 0805, 1/10W, 5% 133626-1025
    R1024 1.00K, 0805, 1/10W, 5% 133626-1025
    R1025 1.00K, 0805, 1/10W, 1% 133625-1001
    R1026 1.00K, 0805, 1/10W, 1% 133625-1001
    R1027 1.00K, 0805, 1/10W, 1% 133625-1001
    R1028 1.00K, 0805, 1/10W, 1% 133625-1001
    R1029 1.00K, 0805, 1/10W, 1% 133625-1001
    R1030 1.00K, 0805, 1/10W, 1% 133625-1001
    R2000 3.01K, 0603, 1/10W, 1% 191465-3011 
    						
    							30
    Preliminary
    ELECTRICAL  PART  LIST
    Resistors Console Main PCB Assembly
    Reference
    DesignatorDescription Part Number Note
    R2004 1K, 0603, 1/10W, 5% 199403-102
    R2005 120 OHMS, 0603, 1/10W, 5% 199403-121
    R2006 499 OHMS, 0603, 1/10W, 1% 191465-4990
    R2007 2.32K, 0603, 1/10W, 1% 191465-2321
    R2008 2.32K, 0603, 1/10W, 1% 191465-2321
    R2009 330 OHMS, 0603, 1/10W, 1% 191465-3300
    R2010 150 OHMS, 0603, 1/10W, 5% 199403-151
    R2011 100 OHMS, 0603, 1/10W, 1% 191465-1000
    R2012 4.75K, 0603, 1/10W, 1% 191465-4751
    R2013 51 OHMS, 0603, 1/10W, 5% 199403-510
    R2014 6.8K, 0603, 1/10W, 5% 199403-682
    R2015 17.8K, 0603, 1/10W, 1% 191465-1782
    R2016 5.1K, 0603, 1/10W, 5% 199403-512
    R2017 5.1K, 0603, 1/10W, 5% 199403-512
    R2018 3.01K, 0603, 1/10W, 1% 191465-3011
    R2019 51 OHMS, 0603, 1/10W, 5% 199403-510
    R2020 3.32K, 0603, 1/10W, 1% 191465-3321
    R2021 3.32K, 0603, 1/10W, 1% 191465-3321
    R2022 4.32K, 0603, 1/10W, 1% 191465-4321
    R2023 4.32K, 0603, 1/10W, 1% 191465-4321
    R2024 3.32K, 0603, 1/10W, 1% 191465-3321
    R2025 3.32K, 0603, 1/10W, 1% 191465-3321
    R2026 17.8K, 0603, 1/10W, 1% 191465-1782
    R2028 10K, 0603, 1/10W, 5% 199403-103
    R2029 4.75K, 0603, 1/10W, 1% 191465-4751
    R2033 6.81K, 0603, 1/10W, 1% 191465-6811
    R2034 2.2K, 0603, 1/10W, 5% 199403-222
    R2035 100 OHMS, 0603, 1/10W,,5% 199403-101
    R2036 3.32K, 0603, 1/10W, 1% 191465-3321
    R2037 2.0K, 0603, 1/10W, 5% 199403-202
    R2038 1K, 0603, 1/10W, 1% 191465-1001
    R2039 1K, 0603, 1/10W, 5% 199403-102
    R2040 1K, 0603, 1/10W, 5% 199403-102
    R2041 82K, 0603, 1/10W, 5% 199403-823
    R2042 82K, 0603, 1/10W, 5% 199403-823
    R2043 1K, 0603, 1/10W, 5% 199403-102
    R2044 JUMPER, 0603 196042
    R2046 2.2K, 0603, 1/10W, 5% 199403-222
    R2048 2.2K, 0603, 1/10W, 5% 199403-222
    R2049 2.2K, 0603, 1/10W, 5% 199403-222
    R2050 JUMPER, 0603 196042
    R2051 3.01K, 0603, 1/10W, 1% 191465-3011
    R2102 2.2K, 0603, 1/10W, 5% 199403-222
    R2103 47K, 0603, 1/10W, 5% 199403-473
    R2104 100K, 0603, 1/10W, 5% 199403-104
    R2105 22 OHMS, 0603, 1/10W, 5% 199403-220 
    						
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