Bose Lifestyle 5 Owners Manual

							©1998 Bose Corporation
Bose¨ Lifestyle¨
Model CD5 Series I Music Center
Service Manual
Note: The first series CD5 can be distinguished from the later CD5V and CD5VII by the serial
number label located on the bottom of the unit. The CD5 will not have a V on the serial number
label, the CD5V will have a V, and the CD5V2 will have a V with the number 2 above the V.
Part Number 174798 REV 01 
						

							1
PROPRIETARY INFORMATION
THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF
BOSE
¨ CORPORATION WHICH IS BEING FURNISHED ONLY FOR
THE PURPOSE  OF SERVICING THE IDENTIFIED BOSE PRODUCT
BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.
Contents
Safety Information ............................................................................................................................ 2
Electrostatic Discharge Sensitive (ESDS) Device Handling ........................................................ 2
Specifications ................................................................................................................................ 3-4
Figure 1. CD5 Block Diagram Sheet 1 of 2 ......................................................................................5
Figure 2. CD5 Block Diagram Sheet 2 of 2 ......................................................................................6
CD Terms ..................................................................................................................................... 7-11
Theory of Operation .................................................................................................................. 12-17
Figure 3. Labelled Exploded View ..................................................................................................18
Disassembly/Assembly Procedures ....................................................................................... 19-21
Figure 4. APC PCB ........................................................................................................................19
Figure 5. Back Panel with Tab Locations .......................................................................................22
Figure 6. Right Cover Assembly (side view) ..................................................................................22
Figure 7. Base Assembly (top view with covers removed) .............................................................22
RC5 Disassembly/Assembly Procedures .................................................................................... 23
Figure 8. Remote Control Assembly Exploded View ......................................................................23
Test Procedures ........................................................................................................................ 24-26
Figure 9. AM Test Setup .................................................................................................................26
Figure 10. Audio PCB Test Section ................................................................................................26
CD Test Procedures .................................................................................................................. 27-31
Figure 11. CD Alignment Fixture and Test Setup ...........................................................................28
Figure 12. Passive Filter Network and Test Setup .........................................................................29
Figure 13. Digital PCB Adjustment Locations ................................................................................32
Parts List Notes .............................................................................................................................. 33
Console Assembly Parts List ........................................................................................................ 34
Figure 14. Exploded View ..............................................................................................................35
Remote Control Assembly Parts List ........................................................................................... 36
Figure 15. RC5 Exploded View ......................................................................................................36
Electrical Part List ..................................................................................................................... 37-46
RC5 Electrical Part List ............................................................................................................. 47-49
Packaging Part List ........................................................................................................................ 50
Figure 16. Packaging Exploded View ............................................................................................50
Service Bulletin ......................................................................................................................... 51-53
CD5 Troubleshooting Guide .......................................................................................................... 54
CD5 Voltages and Waveforms .................................................................................................. 55-58
Integrated Circuit Diagrams ..................................................................................................... 59-66
Figure 17. RC5 PCB Layout ...........................................................................................................67
Figure 18. RC5 Schematic .............................................................................................................68
CAUTION: THE LIFESTYLE
¨ MODEL 5 MUSIC CENTER CONTAINS NO
USER SERVICEABLE PARTS. TO PREVENT WARRANTY INFRACTIONS,
REFER SERVICING TO WARRANTY SERVICE STATIONS OR FACTORY
SERVICE. 
						

							2
SAFETY INFORMATION
1. Parts that have special safety characteristics are identified by the         symbol on
schematics or by special notes in the part lists. Use only replacement parts that
have critical characteristics recommended by the manufacturer.
2. Make leakage current or resistance measurements to determine that exposed
parts are acceptably insulated from the supply circuit before returning the unit
to the customer. Use the following checks to perform these measurements:
A. Leakage Current Hot Check: With the unit completely assembled, plug the AC line cord
directly into a 120V AC outlet. (Do not use an isolation transformer during this test.) Use a
leakage current tester or a metering system that complies with American National Standards
Institute (ANSI) C101.1 Leakage Current for Appliances and Underwriters Laboratories (UL)
1492 (71). With the units AC switch first in the ON position and then in the OFF position,
measure from a known earth ground (metal water pipe, conduit, etc.) to all exposed metal
parts of the unit (antennas, handle bracket, metal cabinet, screw-heads, metallic overlays,
control shafts, etc.), especially any exposed metal parts that offer an electrical return path to
the chassis. Any current measured must not exceed 0.5 milliamp. Reverse the units power
cord plug in the outlet and repeat the test. ANY MEASUREMENTS NOT WITHIN THE LIMITS
SPECIFIED HEREIN INDICATE A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMI-
NATED BEFORE RETURNING THE UNIT TO THE CUSTOMER.
B. Insulation Resistance Test Cold Check: (1) Unplug the power supply and connect a
jumper wire between the two prongs of the plug. (2) Turn on the power switch of the unit. (3)
Measure the resistance with an ohmmeter between the jumpered AC plug and each exposed
metallic cabinet part on the unit. When the exposed metallic part has a return path to the
chassis, the reading should be between 1 and 5.2M W. When there is no return path to the
chassis, the reading must be infinite. If it is not within the limits specified, there is the possibil-
ity of a shock hazard, and the unit must be repaired and rechecked before it is returned to the
customer.
ELECTROSTATIC DISCHARGE SENSITIVE (ESDS)
DEVICE HANDLING
This unit contains ESDS devices. We recommend the following precautions when repairing,
replacing or transporting ESDS devices:
¥ Perform work at an electrically grounded work station.
¥ Wear wrist straps that connect to the station or heel straps that connect to conductive floor
mats.
¥ Avoid touching the leads or contacts of ESDS devices or PC boards even if properly
grounded. Handle boards by the edges only.
¥ Transport or store ESDS devices in ESD protective bags, bins, or totes. Do not insert
unprotected devices into materials such as plastic, polystyrene foam, clear plastic bags,
bubble wrap or plastic trays. 
						

							3
SPECIFICATIONS
General
Dimensions:2.5H x 15W x 9D (6 x 38 x 23cm)
Weight:3.7lb. (1.7kg)
Finish:Plastic, in-mold brushed aluminum finish
Power Input:Detachable power pack, 12VAC compatible with
each countrys power requirements
Serial Data Output:2-3.5mm stereo jacks, Tip: Serial data output,
Ring: +12Vdc turn on output.
Power:14 Watts max.
Input Impedance (@ 1kHz, max. volume):  5kW @ aux./video input, 100kW @ tape input
Output Impedance:600W @ Speaker A, B output, 1kW @ tape output
Distortion:£ 0.02% THD @ 1kHz, 2Vrms
S/N Ratio:³ 105dB (A-weighted, max. volume)
Headphone Output (32W):45mW (max. output)
Channel Separation:70dB
Muting (A, B outputs):-80dB
Max. Output Level:5Vrms (@ 1kHz, THD < .12%)
FM Electrical
Antenna Input:US: 75W F connector, Europe: 75W PAL
Usable Sensitivity:US: 12dBf, Europe: 17dBf
50dB quieting sensitivity:Mono: US: 15dBf, Europe: 20dBf
Stereo: US: 37dBf, Europe: 42dBf
S/N ratio (65dBf input):Mono: 75dB, Stereo: 70dB
THD (65dBf, 1kHz input):Mono: £ 0.2%, Stereo: £ 0.3%
Capture Ratio:1.5dB
AM Rejection (45 dBf input):60dB
Alternate Channel Selectivity (45 dBf input):US: 70dB, Europe: 75dB
Image Rejection:70dB
Frequency Response:± 0.5dB (30Hz-15kHz)
Stereo Channel Separation:40dB @ 1kHz 
						

							4
AM Electrical
CD Electrical
(Continued)
SPECIFICATIONS
Antenna Input:Binding posts
Usable Sensitivity:55dBuV/m (IHF standard test loop antenna)
Alternate Channel Selectivity:60dB
Adjacent Channel Selectivity:45dB
Image Rejection Ratio:40dB
S/N Ratio:50dB (@ 100dBuV/m)
THD:£ 1.0% (@ 100dBuV/m)
Frequency Response (@ 100dBuV/m):100Hz: -8dB
3kHz: -8dB
D/A Process:8x over sampling dual 16-bit D/A conversion
Maximum Output Level:4V
THD+N:0.05% (@ 1kHz, 0dB)
S/N Ratio:100dB (A-weighted)
Channel Separation:³ 50dB (@ 1kHz)
Frequency Response:± 0.5dB (20Hz-20kHz)
Dynamic Range:³ 90dB
Defect Tracking (Void):1.5mm (Pierre Verany Test Disc #2)
Defect Tracking (Black Dot):1mm (ABEX Test Disc TCD-725R)
Defect Tracking (Scratch):1.6mm (ABEX Test Disc TCD-721R)
Defect Tracking (Fingerprint):75um (ABEX Test Disc TCD-725R)
Defect Tracking (Warped disc):1mm (ABEX Test Disc TCD-732RA)
Defect Tracking (Eccentric Disc):280um (ABEX Test Disc TCD-741R) 
						

							5 Figure 1. CD5 Block Diagram Sheet 1 of 2 
						

							6
Figure 2. CD5 Block Diagram Sheet 2 of 2 
						

							7
CD TERMS
Basic Terms
Access: See track access.
Access Time: The length of time required to change tracks.
CD Mechanism: The mechanical assembly of components used to read information off of the
CD. It contains the optical pickup, sled assembly, disc motor, sled motor, and spindle.
Disc Motor: The motor which spins the disc.
Focus Actuator: The magnet and coil assembly that moves the optical pickupÕs lens up and
down.
Laser: A semiconductor light source similar to an LED that is used to read the data off of a CD.
When the laser is turned on it can be seen as a red glow inside the lens.
Laser Pickup: The portion of the CD mechanism that contains the laser diode, lens, focus and
tracking actuators, and photodetector diodes.
Mechanism: see CD Mechanism.
Optical Pickup: See Laser Pickup.
Playability: The extent to which a player can successfully play less than perfect discs. Play-
ability is measured with special test discs (playability discs) that contain certain types of de-
fects and problems.
Playability Disc: A disc which contains a calibrated defect or problem. These include eccen-
tricity, warp, scratch, void, black dot, and fingerprints.
Parking: When the sled is moved to the innermost position on the disc. This is done before (if
necessary) and after playing a disc.
Sled: The portion of the CD mechanism that moves inside to outside to position the optical
pickup near the desired track.
Sled Motor: The motor which moves the sled back and forth.
Spindle: The hub that the disc sits on.
Track Access: The process of moving from one track on a disc to a different track.
Tracking Actuator: The magnet and coil assembly that moves the optical pickupÕs lens inside
and out.
Playability Terms
Dropout: A momentary loss of the audio signal, usually caused by a large scratch or other
optical defect. 
						

							8
CD TERMS
Eccentricity: The extent to which the hole in the middle of the disc is not located in the geo-
metric center. In other words, the amount that the disc moves in and out as it rotates. Eccen-
tricity is measured as the distance between the center of the hole and the center of the disc (as
determined by the spiral tracks).
Mistracking: When a CD player fails to play the disc in a continuous manner. This may be
caused by a large enough optical defect (scratch, etc.) or by vibration.
Optical Defect: A defect on the surface of the disc which adversely affects the reading of
information by the laser pickup. There are four basic types of optical defects: voids, black dots,
fingerprints, and scratches.
Skipping: When a CD mistracks backwards and gets caught in an Òendless loopÓ. This is
usually caused by a large scratch or other optical defect.
Warp: The extent to which the surface of the disc is not parallel to the seating plane of the disc
(at the center). In other words, the amount that the disc wobbles up and down. Warp is mea-
sured as the vertical deviation between the seating plane and the particular point on the disc.
Alignment Terms
CD Alignment: The process of adjusting a CD player for optimum performance, particularly
with respect to its playability.
Free Run Frequency: The VCO frequency in the absence of any signal from the disc. Accu-
rate frequency adjustment is required for the player to be able to read data off the disc. VCO
misalignment results in poor track access and longer access times.
Tracking Offset: The DC offset voltage present at the output of the tracking servo in the
absence of any input signal. For best results, the offset should be adjusted near 0 to keep the
laser positioned in the center of the track. Negative offset causes the laser to be positioned
towards the inside of the track. Misalignment of this parameter can cause the player to skip or
mistrack when playing a dirty or Òblack dotÓ disc, especially if the disc is also eccentric.
Scratches and voids may also cause the problem.
Focus Offset: The DC offset voltage present at the output of the focus servo in the absence of
any input signal. For best results, the offset should be adjusted near 0 to keep the laser exactly
in focus. Misalignment of this parameter usually causes dropouts when playing a dirty or Òblack
dotÓ disc, especially if the disc is also warped. Scratches may also cause problems. Note that
on the CD5, the focus offset is preset and the adjustment pot is not loaded, however, there is a
spot on the PCB for it.
E-F Balance: The DC offset that results from driving both the E and the F elements of the
photodetector with equal signals. For best results, the offset should be adjusted near 0 to keep
the laser positioned in the center of the track. As with track offset, negative offset causes the
laser to be positioned towards the inside of the track. Misalignment of this parameter can
cause any number of problems including: 1. Poor or slow track access even when playing a
good disc, and 2. Skipping or mistracking when playing a scratched or void disc, especially if
the disc is also eccentric. 
						

							9
CD TERMS
Tracking Gain: The overall loop gain of the tracking servo. This controls how tightly the laser
is held in the center of the track. If the gain is too low, the player will have trouble with vibration
and eccentric discs, especially during track access. If the gain is too high the player will have
skips or mistracking with voids and scratches. Proper alignment is a compromise between
these two performance parameters.
Focus Gain: The overall loop gain of the focus servo. This controls how tightly the laser is held
in focus. If the gain is too low, the player will have trouble with vibration and warped discs,
especially during track access. If the gain is too high the player will have skips or mistracking
with black dots and scratches. Proper alignment is a compromise between these two perfor-
mance parameters.
Technical Terms
RFSM: RF SUM. The amplified A+B+C+D signal from the laser pickup.
Eye Pattern: The pattern displayed on an oscilloscope when monitoring the RFSM test point.
Jitter: The extent to which the zero crossings of the eye pattern occur at other than their ideal
times.
Focusing: Before a disc can be played, the player must focus the CD mechanism by changing
the distance between the lens and the surface of the disc. This must occur before the disc can
start rotating. If the player fails to achieve focus, it will retry. This occurs four times in the CD5
before it Ògives upÓ and indicates Òno discÓ by lighting up the disc icon in the display.
TOC: Table Of Contents. The innermost area on the disc where track and time information is
stored. When a new disc is inserted into a player (i.e. when the door switch is opened), it must
read the TOC before the first track can be played.
CIRC: Cross Interleave Reed-Solomon Coding: The error detection and correction scheme
used on CDs to provide immunity to small scratches, etc.
CLV: Constant Linear Velocity. CD players rotate the disc at a constant linear velocity of 1.25
M/S. The  angular velocity changes from about 500 RPM down to 200 RPM as the disc plays
from beginning (inside) to end (outside).
EFM: Eight-to-Fourteen-Modulation. The format in which the digital data is recorded on the
CD.
Photo Diode: The receiving element that translates the modulated light beam into electrical
signals.
Subcode Q data: The track and time information read off the CD.
Three Beam System: The most common system for providing focus and tracking error signals
for the respective servos. A three beam system uses a six element photo diode array, with the
elements designated A through F. The A, B, C, and D elements are located in the center and
read the information as well as supply the focus error signal. The E and F elements are located
on either side and provide the tracking error signal.