Bose Life CD5 I Service Manual

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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

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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.

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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 unit's 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 unit's 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 Ω. 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.

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SPECIFICATIONS

General

Dimensions: 2.5"H x 15"W x 9"D (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 country's 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): 5kΩ @ aux./video input, 100kΩ @ tape input Output Impedance: 600Ω @ Speaker A, B output, 1kΩ @ tape output Distortion: ≤ 0.02% THD @ 1kHz, 2Vrms S/N Ratio: ≥ 105dB (A-weighted, max. volume) Headphone Output (32Ω): 45mW (max. output) Channel Separation: 70dB Muting (A, B outputs): -80dB Max. Output Level: 5Vrms (@ 1kHz, THD < .12%)

FM Electrical

Antenna Input: US: 75Ω F connector, Europe: 75Ω 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

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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: ≥ 50dB (@ 1kHz) Frequency Response: ± 0.5dB (20Hz-20kHz) Dynamic Range: ≥ 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)

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Figure 1. CD5 Block Diagram Sheet 1 of 2

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Figure 2. CD5 Block Diagram Sheet 2 of 2

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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 pickup’s 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. T rack Access: The process of moving from one track on a disc to a different track. T racking Actuator: The magnet and coil assembly that moves the optical pickup’s lens inside

and out.

Playability Terms

Dropout: A momentary loss of the audio signal, usually caused by a large scratch or other

optical defect.

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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 “endless loop”. 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 “black dot” 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 “black dot” 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.

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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 “gives up” and indicates “no disc” 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.

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CD TERMS

Major Components of the System

ASP: Analog Signal Processor. The component in the CD circuitry that contains the RF ampli-

fier, VCO, and the tracking, focus, and sled servos. DSP: Digital Signal Processor. The component in the CD circuitry that performs slicing, EFM

demodulation, CIRC decoding, error correction and concealment, track access, CLV regula- tion, and drives the D/A.

Digital to Analog Converter (D/A, DAC): A device that converts digital information (usually a serial data stream) into an analog signal.

µC: Micro Controller. The component of the CD circuitry that performs track access, se-

quences all events (such as focus, disc start, stop, etc.), monitors for servo errors, and pro- cesses user information (commands, door open, etc.).

CLV Servo: The circuit that keeps the disc rotating at a constant linear velocity. Focus Servo: The circuit that keeps the optical pickup’s lens the proper distance away from

the surface of the disc. Sled Servo: The circuit that keeps the sled positioned within the linear range of the tracking

actuator.

Tracking Servo: The circuit that keeps the optical pickup’s lens positioned within a single track as the disc rotates.

VCO: Voltage Controlled Oscillator. Part of the phased locked loop circuit that generates an output frequency dependent on its input voltage.

Signal Names

ATSC: Anti-Shock Circuit. SLEQ: Sled Equalizer FDO: Focus Drive Output FEAO: Focus Error Amplifier Output. HFL: High Frequency Level PDO: Phase Detector Output PH: Peak Hold

SLDO: Sled Drive Output. SPDO: Spindle Drive Output.

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CD TERMS

Signal Names

(continued)

TAP: Test Access Port. A 3 pin test interface used by automated test to control and observe the board under test.

TDO: Tracking Drive Output. TEAO: Tracking Error Amplifier Output. TGL: Tracking Gain Low. THLD: Tracking Hold. TOFF: Tracking Of f TPA+: Tracking Pre-Amplifier (+ input). TPA-: T racking Pre-Amplifier (- input). TPAO: Tracking Pre-Amplifier Output. VCOO: VCO Output Vref1: The reference voltage used by the RF amplifier in the ASP. Vref2: The unbuffered reference voltage used by the servos in the ASP. Vref3: The buffered reference voltage used by servos in the ASP.

List of Abbreviations

ASP Analog Signal Processor CE Control Expander™ CIRC Cross Interleave Reed-Solomon Code CLV Constant Linear Velocity D/A Digital to Analog DSP Digital Signal Processor EEPROM Electrically Erasable Program Read Only Memory EFM Eight-to-Fourteen Modulation IC Integrated Circuit IR Infrared kHz Kilohertz MHz Megahertz PLL Phase Locked Loop RF Radio Frequency µC Microcontroller VCO Voltage Controlled Oscillator VFD Vacuum Fluorescent Display

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THEORY OF OPERATION

Overview

The Lifestyle® Model 5 music center is a self-contained CD player, AM/FM tuner, preamplifier, and control center for use with Bose

powered speaker systems. In addition to the two internal sources (CD and tuner), it also allows for up to three external devices to be connected (i.e. AUX, VIDEO, and TAPE). It uses a Radio Frequency (RF) remote control that allows the unit to be operated from different rooms within a house without the need for a line-of-sight path back to the console. The remote control commands for the external sources are translated and passed to the serial data output jack. With the CE-I accessory device this data can be con- verted to Infrared (IR) for use with many conventional audio devices.

Power Supply

The unit is powered by an external 12VAC power supply capable of delivering 1.2 amps rms. Dl, C2, D2, and C6 form positive and negative half-wave rectifiers respectively. Q1, Q2, Q3,

and their respective components make up a discrete low dropout regulator with a nominal output voltage of 10. 2V. VR1 is the corresponding negative voltage regulator with an output of

-12V. These two regulators create the bipolar supply used by all of the audio circuits. The supply is turned on and off with the unit by the control signal on J7-10.

R5, D3, C9, and VR2 create an +8V regulated supply that is used by the CD servo circuits and the remote RF receiver. R6, D4, C11, and VR3 create a +5V regulated supply that is used by the main and CD microcontrollers (U402 and U505), and the CD control circuits (U501, U502, etc.). Both supplies are live at all times. R5 and R6 limit the power dissipation of their respec- tive regulators. VR2 and VR3 normally run quite hot to the touch.

R8, D6, and C13 form an unregulated supply (M+) that is used by the CD drive electronics. C14, D7, D8, and C15 form a charge pump that creates a negative high voltage. This voltage is regulated down to -24V by R9, D9, and C16. The vacuum fluorescent display (VFD) driver U403 uses this -24V to shut off segments in the display. C19 and C18 reduce the 12VAC to approximately 3Vrms. This voltage powers the display’s (VFD401) heater. C16, D10, C17, and R10 provide a DC bias of -15V for the VFD heater (cathode).

Control Electronics

Main microcontroller (µC) U402 controls the audio circuits, tuner, display, and push buttons. The µC runs at a nominal frequency of 4.0MHz that is supplied by ceramic resonator X401. The µC is reset by a rising edge on pin 1 caused by R409 and C404. This occurs automatically on power-up but may be forced manually by depressing S416 (if installed).

U402 communicates with U403 over a four wire serial data bus (U403, pins 15, 16, 18 and

19). The bus is updated once per millisecond. U403 latches the serial data into its outputs,

driving the VFD. The VFD is a four grid multiplexed display with 16 anodes at each grid. The grids are turned on sequentially, one each millisecond. As each grid is turned on, the corre- sponding anodes for that grid are also turned on. This lights the desired segments. When the next grid is turned on, the anodes are changed to correspond to the desired segments under this next grid. In this way, the entire display is scanned, 1/4 at a time. The display is blanked for a brief interval in-between when one grid is turned off and the next is turned on. In this blank- ing interval, the push buttons are scanned to determine what keys are being pressed. This data is read in on U402, pins 12 through 15.

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THEORY OF OPERATION

There is one main serial data bus that controls source selection IC U101, volume control IC U103, PLL frequency synthesizer U302, and EEPROM U401. The clock and data information for all of these devices is sent out on U402, pins 5 and 7. However, U401, U302, U101 and U103 each have their own chip select line. Data is sent to U302 whenever the tuner frequency is changed. During the serial data transmission, U302, pin 3 is driven high. Data is sent to U101 or U103 whenever a new source is selected or the volume is changed. At the completion of this transmission, the STRB line (J9-5) is driven high briefly.

U401 is a nonvolatile EEPROM which is used for storing certain data such as tuner presets

and house codes. This data is protected from loss during a power outage. U401 communicates with U402 over the main serial data bus. During communication to this chip, the chip select line (U401, pin 1) is driven high.

There is another serial data bus between U402 and U505. These lines are labeled CD_READY, CD_CLK, CD_ CMD, and CD_DATA on the schematic. The bus sends com- mands (play, stop, etc.) to U505 and also sends track and time information to U402 so that it may be displayed. This bus is constantly in use any time “CD” is selected as the source.

RR101 receives and demodulates commands from the RF remote control. R138, C130, C129, R139, and D109 remove noise and shape the pulse. U106 squares up the pulse edges and

converts them to 5V logic levels. This signal is then fed to U402, pin 37. C401 prevents any glitches at this pin.

In addition to the major functions mentioned above, U402 also performs several miscellaneous tasks. The bipolar power supply for the audio circuits (+1OV/-12V) is turned on and off by U402, pin 19 (power). Both supplies are turned on when this line is high (+5V), and off when it is low. The unregulated supply is monitored by C414, R407, and R408. In the event of a power failure, U402 will shut down the system gracefully. There are three independent muting cir- cuits: Mute A, Mute B, and Power-on Mute. Mute A and Mute B are controllable from the remote, and allows the A and B outputs to be controlled independently. The Power-on Mute is used only during power-up (when the bipolar supply is turned on) to prevent pops and clicks. When an external source is selected (AUX, VIDEO, or TAPE), the transport commands (FF, FR, etc.) are passed through the serial data jack via Q401 and its associated circuitry.

Audio Circuits

There are two internal audio sources (CD and Tuner) and three external sources (AUX, VIDEO, and TAPE). All of the sources are routed to U101. R101-106 and R201-206 provide level matching for the different input sources. D101-106, D201-206, C101-103, and C201-203 provide static protection on the inputs. U101 selects 1 of the 5 input sources, and routes it to its output on pins 5 and 9 (left), and pins 20 and 24 (right).

One half of U102 (pins 1-3 and 12-14) provides gain and buffering for the input signal. The buffered output is routed to U103 and to the FIXED output on J103. U103 consists of two sections. The first section attenuates the signal from 0 to 70dB in 10dB steps. The output of the first section is buffered by the other half of U102 (pins 5-7 and 8-10) and is fed to the second section. The second section attenuates the signal in 1dB steps. The two sections together provide smooth attenuation from 0 to 80dB in 1dB steps.

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THEORY OF OPERATION

U103’s output signal is buffered by U105, and is fed to the A and B outputs. These outputs are

independently mutable through transistors Q103-106 and Q203-206. Each pair of transistors provides approximately 80dB of attenuation when muted. These mute transistors are con- trolled by the signals on J9-7 and J9-8. U103’s output signal is also routed to headphone amplifier U104. This provides gain and buffers the signal in order to drive a low impedance load. When the headphones are inserted into J104, the control signal on J105-3 causes the A speaker output to be muted.

The TAPE output jack functions like the FIXED output does. There is one exception. The TAPE output is shut off whenever “TAPE” is selected as the source. This prevents feedback through the TAPE deck if it was placed in “Record” while “TAPE” was selected as the source. This is accomplished by feeding the FIXED level output signal from U102, pins 1 and 14 back into

U101. A control signal from U402 allows U101 to pass this signal to its outputs on pins 5 and 17, except when “TAPE” is selected as a source.

The FIXED, TAPE, and headphone outputs all have a single mute transistor which is used to prevent pops and clicks during power-up and power-down. These transistors are all controlled by the signal on J9-6. Each transistor provides about 40dB of attenuation when the muting is switched on.

CD Player

The CD circuitry consists of six major sections: Analog signal processor (ASP) U501, digital signal processor (DSP) U502, digital to analog converter (D/A) U506, CD microcontroller (µC) U505, power drivers U503 and U504, and the CD mechanism. U501 contains the RF amplifier and servo control circuits. U502 performs EFM demodulation, CIRC decoding, and outputs the digital audio to U506. It also extracts the subcode Q information (track #, time, etc.) and con- trols U501 during track access. U505 receives and interprets the subcode Q data from U502 and sends it along to U402. It also issues commands to U502 for track access, and controls all operations of the CD circuitry.

U501 receives its input signal (through P501) from the mechanism’s photo diode pickup. The A, B, C, and D inputs are added together and amplified. The RF amplifier output appears on

RFSM (U501, pin 72 ). This signal is the familiar “eye pattern.” This signal is sent to EFMIN on U502, Pin 8 where it is sliced for EFM demodulation. The inverted and non-inverted sliced

outputs appear on the EFMO and EFMO~ lines (U502, pins 6 and 7) . These signals are low- passed and subtracted and the output appears on SLCO (U501, pin 53). This signal supplies the DC bias for the RFSM signal. This signal is then sent to the slicer for slice level control.

The RFSM signal is peak-detected and compared to a reference to determine if there is a signal being received back from the disc. The output appears on DRF (U501, pin 40 ). This signal is used by U505 to determine if the lens is in focus. The envelope of the RFSM signal is also used in determining when the laser crosses a track boundary during track access. The HFL signal (U501, pin 48) conveys this information to U502.

The A+C signal is subtracted from the B+D signal. This produces the focus error signal FEAO (U501, pin 26 ). The focus gain is adjusted by R527. This signal is amplified and filtered by the focus servo amplifier (inside U501). It then appears as an output at FDO (U501, pin 22). The FDO signal is fed to U503. U503 generates the complementary outputs (pins 11 and 14) that are used to actuate the focus coil (P502, pins 5 and 8).

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THEORY OF OPERATION

The E and F signals are amplified and subtracted. This produces the tracking error signal TEAO (U501, pin 7 ). The F channel’s gain is adjusted by E-F balance potentiometer R506.

The TEAO signal is used by the anti-shock circuit, the track jump detection circuit, and the tracking servo. The track jump detection output is sent to U502 on the TES line (U501, pin 47). R510, which is connected to TPA+ (U501, pin 13 ), adjusts the tracking gain. This signal is amplified and filtered. It then appears as an output on TPAO (U501, pin 15). R511 adjusts the tracking offset . The TPAO signal is further amplified and filtered. It then appears as an output on TDO (U501, pin 21). This signal is fed to U503. U503 generates the complementary out- puts (U503) that are used to actuate the tracking coil (P502, pins 6 and 7).

The TDO signal is also used as the input for the sled servo. This signal is filtered and fed to the sled servo amplifier on SLEQ (U501, pin 20). This signal is amplified and is then added to the

FEED signals from U505. The result appears on SLDO (U501, pin 33). This signal is fed to U504. U504 generates the complementary outputs (pins 11 and 14) that are used to drive the

sled motor (P503, pins 5 and 6). The Constant Linear Velocity (CLV) servo is regulated by comparing the playback speed to a

FIXED reference frequency in U502. The error signal appears at U502, pins 10 and 11 (CLV+ and CLV-). These signals are subtracted and the difference appears on SPD (U501, pin 29). The SPD signal is filtered and amplified. It then appears at the output on SPDO (U501, pin

31). This signal is fed to U504. U504 generates the complementary outputs (pins 3 and 6) that are used to drive the disc motor (P503, pins 1 and 2).

U501 regulates the laser power by monitoring the MD input (P502-3). This signal is compared to a reference to generate the proper drive signal on LDD (U501, pin 74). This signal biases

Q501. Q501 drives the laser diode output LD (P502-1). U501’s main DC reference voltage is Vref3 which appears on pin 9. This voltage is nominally 4V.

The VCO is the final function contained in U501. The VCO is used by U502 for EFM demodu- lation. The PDO output signal (U502, pin 4) is filtered and amplified by U501. In turn, this output appears on VCOC (U501, pin 59) This is the VCO control voltage input. The nominal VCO free-run frequency is 8.64MHz and is set by R558. The VCO also requires a 16.9344MHz clock input from U502. This input appears on CLK (U501, pin 62). The VCO output appears at

VCOO (U501, pin 60). This signal is buffered by U502. The buffered output appears on AO (U502, pin 2). The VCO output is divided by 2 in U502. In turn, its output appears on PCK (U502, pin 18), which is 4.32MHz.

The DSP clock is derived from a 16.9344MHz crystal oscillator (X501). However, this oscillator is normally turned off by U505. It is only switched on during focusing and when a disc is play- ing. U502 receives its EFM input from U501 on EFMIN (pin 8). This signal is sliced, EFM demodulated, and CIRC decoded. The digital audio output signal is sent serially to U506 on the LRCLK, DFOUT and DACLK lines (U502, pins 33, 35, and 36).

U502 receives servo control commands from U505 on the serial bus (U502, pins 51, 53 and

54). These commands are translated to appropriate control signals for U501 for focusing, disc start, disc stop, disc braking, and track jumps. The focus servo is controlled by the FOCS and FST outputs. The CLV servo is controlled through the CLV+ and CLV- lines. The tracking

servo is controlled by the TOFF, TGL, and THLD outputs. Track jumps are created by signals on the JP+ and JP- lines. Track jump detection is based on signals from U501 on the HFL and TES inputs.

Page 17

THEORY OF OPERATION

U505’s oscillator is obtained from a 4MHz ceramic resonator (X502). U505 is reset by a rising

edge on pin 1 that is caused by R573 and C574. This occurs automatically on power-up, but may be forced manually by depressing S502 (if installed). U505 communicates with U502 on a serial bus (U502, pins 50 through 54). U505 sends servo commands for focusing and track access to U502. U502 sends subcode Q data to U505 which extracts track, time and table of contents information from it. The time and track data is formatted, and is sent to U402 on a serial bus (U505, pins 11-13).

During track access, U505 controls the sled motor directly using the FEED+ and FEED- lines (U505, pins 21 and 22). It also directly controls the laser U503 and VCO using the LASER~ line (U505, pin 9). When the laser is turned on, the VCO and U503 are enabled, otherwise they are turned off. U505 can also enable and disable U504 with the MOTOR_EN line (U505,

pin 20). U506 (D/A converter) performs 8x oversampling and digital filtering. It then converts the digital

audio into left and right stereo outputs. D/A reference voltages are obtained from zener diode D504. U506’s analog outputs are buffered by one-half of U507 (pins 5-7 and 8-10). The buffered signal is lowpass filtered by the other half of U507. This removes any residual out-of- band digital noise. The recovered audio is then routed to U101.

Tuner

The FM antenna signal is routed through F connector J301 and enters the FM front end mod- ule. This contains a tuned RF amplifier, FM local oscillator, and a mixer. The IF output signal appears on pin 4 (front end) and passes through 10.7MHz ceramic filter CF302. The filter’s output is amplified by the IF gain stage. This stage consists of Q307, Q308 and their associ- ated components. The signal is then passed through a second ceramic filter, CF303, a second gain stage (Q309, Q310, etc.) and a third ceramic filter, CF304.

CF304’s output signal is sent to the main tuner IC, U301. This device contains the FM detec- tor, FM stereo MPX decoder, stop level detection, as well as most of the AM circuitry (see below). U301 further amplifies the IF signal, and then performs FM detection. This detection uses a double tuned quadrature detector formed by T304 and T305. T305 is adjusted for FM center frequency by adjusting it for 0VDC between the AFC terminal (U301, pin 4) and the Vreg terminal (U301, pin 28). T304 is adjusted for minimum distortion (A few iterations may be required because these two adjustments are dependent on one another). The recovered audio appears on U301, pin 8.

C313 and its associated components filter the recovered audio and feed it back into U301, pin

9. U301 performs the FM stereo MPX decoding. When you select FM, the decoded L/R chan-

nel signals are sent out on pins 14 and 15. The resistance between pin 12 and ground controls the separation. 456kHz ceramic resonator CF301 controls the PLL decoder. The PLL loop filter components are connected to pin 11. Potentiometer R334, which is connected to pin

30, sets the FM stop level to 33dBf (nominal). C304, R304, C307, and R309 perform FM de-emphasis. Q301, Q302 and their associated

components buffer the signals. MPX filters T301 and T302 remove any unwanted out-of-band signals before sending them to U101.

The AM loop antenna signal enters the unit through J301’s screw terminals. The signal is then fed to AM front end module, T303. This device contains an RF tuned section and the AM local

Page 18

THEORY OF OPERATION

oscillator tuned circuit. The tuned output appears on pin 12 and is fed to AM buffer FET Q300. The buffered output is sent to U301, pin 27. U301 contains the AM RF amplifier, mixer, IF amplifier, AM detector and AM stop level detection. Potentiometer R339, which is connected to pin 16, sets the AM stop level to 70dB uV/M (nominal). The IF output signal appears on pin 26 and is filtered by IF filter T307. The signal is then fed back into U301, pin 24 for AM detection. The AM detected output (pin 5) is filtered by C315, R316, and C314. The filtered output is fed back into U301, pin 6. Finally, it is sent to the L/R outputs (pins 14 and 15) when “AM” is selected.

U302 controls the AM and FM local oscillators. U402 sets U302 so that it can select the AM or FM band and can tune to a particular frequency. The PLL reference oscillator originates from

7.2MHz crystal X301. This frequency is divided down to 400KHz (U302, pin 7). U302 divides down the local oscillator frequencies and compares them to an internal reference frequency. The error signal resulting from this comparison appears at pin 18. This error signal is inte- grated and filtered by Q304, Q305, and their associated components. This produces the tuning voltage which appears at Q304’s collector.

The tuning voltage is further filtered by R323, C326, R322, and C319. This signal is then sent to AM front end module T303, pin 14. It is used to vary the capacitance of two varactor diodes. This first diode varies the frequency of the AM local oscillator. The second tunes the AM RF input section to the desired frequency. Similarly, the tuning voltage is filtered by R330 and C333. Then it is fed to the FM front end module. The front end uses this voltage to vary the local oscillator frequency and to tune the RF input sections.

Page 19

See Figure 6 for a side view of this assembly.

Figure 3. Labelled Exploded View

Page 20

front of the base assembly (19). Lower the cover into position.

4.3 There are two black tabs on the bottom of the right cover. Push them in slightly and snap the cover into place.

4.4 Replace the two screws (18B) that secure the right cover to the base.

4.5 Replace the left cover assembly (Pro- cedure 2).

5. CD Mechanism Removal

Note: Refer to Figures 3, 4 and 7 for

Procedures 5 and 6.

5.1 Remove the left cover assembly (Pro- cedure 1) and the door/right cover assem- bly (Procedure 3).

5.2 Lift the CD mechanism (11) straight up from the four metal posts in the base (19). Later models have 4 nylon washers (23) mounted on the posts. Do not remove them.

5.3 To prevent electrostatic damage to the mechanism, solder together the two points indicated in Figure 4.

Figure 4. APC PCB

5.4 Disconnect the 6 pin connector from the

PCB that is attached to the motors and the 5 pin and 8 pin connectors from the APC PCB. Note: The support grommets (14, 15) and CD cover (12) are not supplied as part of the mechanism. Remove and reuse them if complete replacement of the mechanism is required.

DISASSEMBLY/ ASSEMBLY PROCEDURES

1. Left Cover Assembly Removal

Note: Refer to Figures 3 and 5 for Proce-

dures 1 and 2.

1.1 Remove the two screws (18A) that secure the left cover (7) to the base (19).

1.2 Press in the three recessed gray tabs located on the connector panel and lift up on the rear of the cover.

2. Left Cover Assembly Replacement

2.1 Align the five hooks on the left cover (7)

with the five catches on the front of the base (19).

2.2 Lower the left cover and snap it into place. The cover should be flush with the closed door assembly (1).

2.3 Replace the two screws (18A) that secure the left cover to the base (19).

3. Door Assembly and Right Cover Re- moval

Note: Refer to Figures 3, 5 and 6 for

Procedures 3 and 4.

3.1 Remove the left cover assembly (Pro- cedure 1).

3.2 Remove the two screws (18B) that secure the right cover (6) to the base (19).

3.3 Press in the two recessed black tabs located on the connector panel. Lift up on the rear of the door assembly (1) and right cover assembly (6).

3.4 Remove the console latch (16).

4. Door Assembly and Right Cover Re- placement

4.1 Position the console latch (16) in the

base (19).

4.2 Align the two hooks on the right cover assembly (6) with the two catches on the

Shorting point

Page 21

DISASSEMBLY/ ASSEMBLY PROCEDURES

5.5 Slide the violet (14) and gray (15)

grommets away from the slots in each corner of the mechanism.

5.6 Remove the two screws (13) that secure the cover (12) to the mechanism. Unsnap the cover from the mechanism.

6. CD Mechanism Replacement

6.1 Snap the cover (12) into position. Align

the screw holes and replace the two screws (13) that secure the cover to the mecha- nism (11).

6.2 Slide the violet (14) and gray (15) grommets into their respective slots on each corner of the mechanism. See Figure 3 for their proper locations.

6.3 Connect the 6 pin connector to the PCB that is connected to the motors and the 5 pin (with black cable) and 8 pin connectors to the APC PCB.

6.4 Remove the solder from the shorted points shown in Figure 4. Note: Make sure that four nylon washers (23) are mounted on the posts before installing the mechanism (later models only).

Note: The CD mechanism wires must be routed correctly (see Figure 7) for proper CD operation. A sign of improper routing is a clicking noise when playing tracks at the outermost edge of the CD. Perform the CD Final Verification tests on page 31 to ensure proper operation.

6.5 Place the mechanism on the four metal posts located in the base (19). Position as shown in Figure 3.

6.6 Replace the door/right cover assembly (Procedure 4) and left cover assembly (Procedure 2).

7. Digital PCB Removal

Note: Refer to Figures 3 and 7 for Proce-

dures 7 and 8.

7.1 Remove the left cover assembly (Pro- cedure 1) and the right cover/door assem- bly (Procedure 3).

7.2 Lift up the CD mechanism (11) and move it aside. Keep the mechanism con- nected to the PCB unless removal is required. See Procedure 5 for removal procedure.

7.3 There are four black plastic tabs that hold the PCB (10) in position. See Figure 3. Flex them carefully outward and pull the PCB up and out.

7.4 Remove any connections required to troubleshoot the PCB.

8. Digital PCB Replacement

8.1 Replace any connections that were

disconnected during troubleshooting.

8.2 Slide the PCB (10) into position. There are notches in the PCB which mate with notches in the base (19). See Figure 7.

8.3 Snap the PCB carefully down under the four locking tabs.

8.4 Push the CD mechanism (11) down onto the four metal posts.

8.5 Replace the right cover/door assembly (Procedure 4) and the left cover assembly (Procedure 2).

9. Audio PCB Removal

Note: Refer to Figures 3 and 7 for Proce-

dures 9 and 10.

9.1 Remove the left cover assembly (Pro- cedure 1), the door/right cover assembly (Procedure 3), and the Digital PCB (Proce- dure 7).

9.2 There are four locking tabs (three on the PCB edges and one in the middle of the PCB) that secure the PCB (10) to the base (19). Flex the tabs carefully away from the PCB and disengage the PCB.

Page 22

DISASSEMBLY/ASSEMBLY PROCEDURES

9.3 Slide the PCB clear of the connector

panel, and pull it away from the base.

9.4 Remove any connections required to troubleshoot the PCB.

10. Audio PCB Replacement

Note: Make sure that the connections to

the Headphone Jack PCB (10) are routed through the guiding notch on the side of the console (see Figure 7).

10.1 Restore any connections that were disconnected during troubleshooting.

10.2 Slide the PCB's connectors through the holes in the rear of the base (19).

10.3 Snap the PCB (10) carefully down under the four locking tabs. Make sure that the CD mechanism connections are routed properly. See Figure 7 and procedure 6 note.

10.4 Replace the Digital PCB (Procedure

8), the door/right cover assembly (Proce- dure 4), and the left cover assembly (Pro- cedure 2).

11. Headphone Jack PCB Removal

Note: Refer to Figures 3 and 7 for Proce-

dures 11 and 12.

11.1 Remove the left cover assembly (Procedure 1) and door/right cover assem- bly (Procedure 3).

11.2 There are two black plastic snaps that secure the PCB (10). Flex the snaps outward and carefully pull the PCB away from the unit.

12. Headphone Jack PCB Replacement

12.1 Snap the PCB (10) into place by

engaging the two locking tabs. Note: Make sure that the connector wires are routed through the guiding notch on the side of the base (19).

12.2 Replace the door/right cover assembly (Procedure 4) and the left cover assembly (Procedure 2).

Page 23

Figure 5. Back Panel with Tab Locations

Hooks onto front of console.

Figure 6. Right Cover Assembly (side view)

Figure 7. Base Assembly (top view with covers removed)

Tab that fits into cutouts on back panel

Page 24

RC5 DISASSEMBLY/ASSEMBLY PROCEDURES

1. Enclosure Disassembly

1.1 Slide off the battery compartment door

(5) and remove the batteries.

1.2 While holding the top cover (4) with one hand, place your fingers from your other hand in the battery compartment and grasp the lower part of the bottom cover (3) with your fingers.

1.3 With your finger tips in the battery compartment, first pull parallel to the unit and then pull perpendicular.

1.4 With the catches released at the bottom, work your fingers up the sides to release the rest of the catches.

2. Enclosure Assembly

2.1 Lower the bottom cover (3) onto the top

cover (4) so that the bottom cover's lip fits over the top cover.

Figure 8. Remote Control Assembly Exploded View

2.2 Press the top cover and the bottom cover together until they snap into place.

3. PCB Removal

3.1 Lift the PCB (1) straight up. The springs

will come up with the PCB.

4. PCB Replacement

4.1 Lower the PCB (1) into the top cover (4)

so that the springs are in the battery com- partment.

5. Pad Removal

5.1 The pad (2) is not secured. Grasp a

corner of the pad and lift it out.

6. Pad Replacement

6.1 Lower the pad (2) into the top cover (4)

so that the buttons line up with the holes in the top cover.

Page 25

TEST PROCEDURES

GENERAL TEST SETUP

Load the outputs as follows: Headphone output-33Ω, 1% load. Audio (A, B, Fixed) outputs-10kΩ load.

Note: The remote control or console buttons can be used to select sources in these procedures.

1. AUX Gain Test

1.1 Select AUX.

1.2 Apply a 500mVrms, 1kHz signal to the

left (right) AUX input. Adjust the volume to maximum. Reference a dB meter to the applied signal.

1.3 Ground the TAPE, VIDEO and the right AUX inputs.

1.4 Measure the outputs according to the following table.

1.5 Repeat this test for the right channel. Note: This test is the same for the VIDEO

input. Apply a 500mVrms, 1kHz signal to the left (right) VIDEO input and repeat this test.

2. AUX Separation Test

2.1 Select AUX.

2.2 Apply a 500mVrms, 1kHz signal to the

left (right) AUX input. Adjust the volume to maximum. Reference a dB meter to the applied signal.

2.3 Ground the TAPE, VIDEO, and right AUX inputs.

2.4 Measure the outputs according to the following table.

2.5 Repeat this test for the right channel. Note: This test is the same for the VIDEO

input. Apply a 500mVrms, 1kHz signal to the left (right) VIDEO input and repeat this test.

3. TAPE Gain Test

3.1 Select TAPE.

3.2 Apply a 500mVrms, 1kHz signal to the

left (right) TAPE input. Adjust the volume to maximum. Reference a dB meter to the applied signal.

3.3 Ground the AUX, VIDEO and the right TAPE inputs.

3.4 Measure the FIXED level output. It should be 8.9 to 9.9dB.

3.5 Repeat this test for the right channel.

4. Volume Control Mute

4.1 Select the AUX input.

4.2 Apply a 500mVrms, 1kHz signal to the

left (right) AUX input.

4.3 Set the volume to minimum at the speaker A output.

4.4 Measure the gain at the A output (relative to maximum volume). It should be

≥ -75dB.

Output Separation (dB)

Speaker A (L,R) ≥50 Speaker B (L,R) ≥50 Tape (L,R) ≥50 Fixed (L,R) ≥50 Headphone (L,R) ≥50

Output Min

(dB)

Max

(dB)

Speaker A (L,R) 4.2 5.4 Speaker B (L,R) 4.2 5.4 Tape (L,R) 3.3 4.5 Fixed (L,R) 4.2 5.4 Headphone (L,R) 5.4 7.4

Page 26

TEST PROCEDURES

5. Headphone Mute

5.1 Select the AUX input.

5.2 Apply a 500mVrms, 1kHz signal to the L/R AUX input.

5.3 Insert a mini-jack into the headphone

output. The A output should mute.

FM ALIGNMENT TESTS AND

ADJUSTMENTS

Unless otherwise noted, set an RF genera- tor to 98.1MHz, 40dBf, 1kHz, mono modu- lation, pilot off, 100% (75kHz deviation).

1. Front End Mixer Coil Adjustment

1.1 Adjust the FM front end (TUNER) mixer

coil until a maximum DC voltage is mea- sured at U301 pin 25. Adjust the coil until the voltage comes within +0, -20mV of the peak voltage.

2. FM Detector Zero Adjust and Distortion Adjustment

2.1 Set the RF generator to 65dBf.

2.2 Adjust T305 until the voltage reads

0Vdc ± 110mVdc across C317+ (AFC test point) and C322+ (VREG test point).

2.3 Adjust T304 for minimum distortion. The distortion should be < 0.4%.

2.4 Repeat this procedure until optimal results are obtained.

3. FM Stop Level Adjustment

3.1 Set the RF generator to 31dBf.

3.2 Rotate R334 counterclockwise until the

voltage at U301 pin 21 drops below 2.5Vdc. Then rotate R334 clockwise until the voltage goes above 2.5Vdc. Note: The correct adjustment is at the point just after the voltage switches high.

3.3 Adjust the generator's output to 35dBf. Verify that U301 pin 21 is < 2.5Vdc.

4. Stereo Separation

4.1 Set the RF generator to 65 dBf, pilot on,

left modulation, 1kHz, 100% (75kHz devia- tion).

4.2 Reference a dB meter to left FIXED output.

4.3 Measure the right FIXED output. It should be ≤ -25dB. Note: If the unit fails this test, perform the following procedure.

1. Change R354 to a 560Ω, 5%, 1/10.

2. Remove W302.

3. Add R355 (a 1kΩ, 10%, 1/2 W potenti- ometer). Adjust R355 for maximum separa- tion. This option is listed on note 9 of the schematic.

5. FM Sensitivity

5.1 Set the RF generator to 42dBf, L= -R

modulation, pilot on.

5.2 Reference a dB meter to the left FIXED output.

5.3 Measure the noise (with modulation off and pilot on) at the right FIXED output. The SNR should be > 50dB for the 120V ver- sion and > 45dB for the 220V version. Note: If the unit fails this test, the FM front end should be replaced.

Page 27

AM ALIGNMENT PROCEDURES

Test setup: Connect the generator to a

standard radiating loop. Unless otherwise noted, set an RF generator to 70dBu field strength, 400Hz, 30% modulation. See Figure 9.

Figure 9. AM Test Setup

The equivalent field intensity is 26dB less than the generator output level or 1/20

the output voltage.

1. AM Sensitivity Alignment

1.1 Set the RF generator so that the field

strength at the unit's antenna is 70dBµ (70dBµ V/M).

STANDARD SIGNAL GENERATOR

60cm

TEST LOOP

(PLAN VIEW)

(SIDE VIEW)

Figure 10. Audio PCB Test Section

TEST PROCEDURES

1.2 Reference a dB meter to the Fixed level

output.

1.3 Shut off the modulation and measure the noise. The SNR should be > 30dB.

2. AM Stop Level Adjustment

2.1 Set the RF generator so that the field

strength at the unit's antenna is 59dBµ (59dBµ V/M).

2.2 Rotate R339 counterclockwise until the voltage measured at U301 pin 21 goes below 2.5Vdc. Then, rotate R339 clockwise until the voltage goes above 2.5Vdc. Note: The correct adjustment is at the point just after the voltage switches high.

2.3 Adjust the field strength to 64 dBµ (64 dBµ V/M). Verify that the voltage at U301 pin 21 is < 2.5Vdc.

Page 28

button until TO lights up). The meter should read approximately 90mVdc.

2.4 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Select CD (S413).

2.5 After the focusing operation is com- pleted, press ERASE (S403). The meter should change from its previous reading in step 2.3 (it will drop). If not, remove power and repeat the test.

2.6 Adjust R511 until the meter reads between -7 to 17mVdc.

3. E/F Balance (E/F)

3.1 Advance the alignment fixture (ADV

button) to the E/F setting and set the voltmeter to read DC voltage.

3.2 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Load the YEDS-18 test disc, select CD (S413), and play track 2.

3.3 Press STORE (S411). This puts the unit in the E/F balance mode. The time display will stop.

3.4 Adjust R506 until the meter reads between - 10 to + 50mVdc.

4. Tracking Gain (TG)

4.1 Shut the unit off.

4.2 Advance the fixture to the TG setting

and set the voltmeter to read AC voltage.

4.3 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Load the YEDS-18 test disc, select CD (S413), and play track 2.

4.4 Adjust R510 until the meter reads between 440 to 500mVrms.

CD ALIGNMENT PROCEDURES

(WITH FIXTURE)

Note: Some of these procedures require

the use of a CD alignment fixture (P/N

176318). Alternate procedures that do not require a fixture begin on page 30. Refer to Figure 11, CD Alignment Fixture Test Setup. The fixture is required unless other- wise specified. Refer to Figure 13 for adjustment locations.

Test Equipment Needed

Digital Voltmeter

Frequency Counter

Sony Disc YEDS-18

Bose

CD Alignment Fixture (176318)

1. PLL Free Run Frequency (VCO)

Note: This test does not require a test disk

or the alignment fixture.

1.1 Connect the frequency counter to PCK and ground.

1.2 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Select CD (S413).

1.3 Adjust R558 until the frequency counter reads 4.320MHz ± 20kHz. (If the adjust- ment is not done within 4 seconds, then CD must be selected again).

2. Tracking Offset (TO)

Note: Remove any previously loaded test

disc. This test will not work with a disc loaded.

2.1 Connect the cable from the test fixture to connector P504 on the unit.

2.2 Connect a DC voltmeter to the positive (+) and negative (-) terminals on the test fixture.

2.3 Select TO on the fixture (press the ADV

CD TEST PROCEDURES

Page 29

Figure 11. CD Alignment Fixture and Test Setup

5. Focus Gain (FG)

5.1 Advance the fixture to FG and set the

voltmeter to read AC voltage.

5.2 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Load the test disc, select CD (S413), and play track

5.3 Adjust R527 until the meter reads between 380 to 420mVrms.

6. Tracking Offset Readjustment

6.1 Refer to procedure 2 and readjust if

necessary.

CD TEST PROCEDURES

ADV.

TO E/F

TG FG

P504

Front Panel

Back Panel

12 VAC

CD5

DVM

2' cable connects to “12 VAC ~ IN" on CD5 back panel. Both ends of the cable are terminated exactly the same way as the power pack.

This RJ-45 connection only fits one way. The other end plugs directly into P504 on the Digital PCB.

Power

Pack

Page 30

Figure 12. Passive Filter Network and Test Setup

Page 31

CD TEST PROCEDURES

CD ALIGNMENT PROCEDURES

(Without Fixture)

Note: Refer to Figure 12 throughout this

procedure.

Test Equipment Needed

Voltmeter (input impedance > 10MΩ)

Frequency Counter

Sony Disc YEDS-18

Audio Oscillator

1. PLL Free Run Frequency (VCO)

1.1 Connect the frequency counter to PCK

and ground.

1.2 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Select CD (S413).

1.3 Adjust R558 until the frequency counter reads 4.320MHz ± 20kHz. (If the adjust- ment is not done within four seconds, then CD must be selected again).

2. Tracking Offset

Note: Remove any previously loaded test

discs. This test will not work with a disc loaded.

2.1 Connect a DC voltmeter between P504 pins 2 (TDO) and 1 (Vref3). The meter should read approximately 90mVdc.

2.2 Simulate a closed CD door by placing an object between S501's two black posts (the CD door latch can be used). Select CD (S413).

2.3 After the focusing operation is com- pleted, press ERASE (S403). The meter should change from its previous reading in step 2.1 (it will drop). If not, remove power and repeat the test.

2.4 Adjust R511 until the meter reads between -7 to +17mVdc.

3. E/F Balance

Note: The test disc is required for this test.

Construct the filter indicated in Figure 12 and connect it to P504 pin 4 (TEAO).

3.1 Connect a DC voltmeter between the filter output and P504 pin 1 (Vref3).

3.2 Load the test disc, select CD (S413), and play track 2. Skip forward using S408.

3.3 Press STORE (S411). This puts the unit in the E/F balance mode. The time display will stop.

3.4 Adjust R506 until the meter reads between - 10 to + 50mVdc.

4. Tracking Gain

Note: Shut the unit off. Construct the filter

indicated in Figure 12 and connect it (FLT IN) to P504 pin 6 (TPA+).

4.1 Connect an AC voltmeter between the filter output (FLT OUT) and P504 pin 1 (Vref3).

4.2 Connect a 100kΩ resistor to P504 pin 7 (TPA-). Connect an oscillator to the resistor's other end and apply a .5Vrms,

1.7kHz signal to it.

4.3 Insert the test disc and select CD (S413) and play track 2.

4.4 Adjust R510 until the meter reads between 26.3 ± 1.5mVrms.

5. Focus Gain

Note: Construct the filter indicated in

Figure 12 and connect it (FLT IN) to P504 pin 5 (FEAO).

5.1 Connect an AC voltmeter between the filter output (FLT OUT) and P504 pin 1 (Vref3).

5.2 Connect a 300kΩ resistor to P504 pin 8 (FSW). Connect an oscillator to the resistor's other end and apply a .5Vrms,

1.7kHz signal to it.

Page 32

5.3 Skip back to the beginning of track 2.

5.4 Adjust R527 until the meter reads

between 23.2 ± 1.5mVrms.

6. Tracking Offset Readjustment

6.1 Refer to procedure 2 and readjust if

necessary.

Final CD Verification Tests

Note: Audible defects are defined as CD

dropouts or skipping during play. All units must be able to pass these tests without any audible defects.

1. Warp

1.1 Insert Abex test disc TCD-732RA (or

equivalent). Play track 16 (.7 mm).

1.2 Pause the CD and confirm that there are no mechanical scraping sounds.

1.3 Access track 16 again and confirm that it plays properly.

2. Eccentricity

2.1 Insert Abex test disc TCD-714R

(equivalent test disc must be eccentric by 210µm).

2.2 Play track 1 (210µm). Listen for at least 4 seconds.

2.3 Access track 15 ( or furthest track on equivalent disc) and confirm that the unit plays properly.

3. Optical Defects

3.1 Insert Abex test disc TCD-725 (or

equivalent).

3.2 Void: Play track 6 (1mm). Listen for at least 6 seconds.

3.3 Black dot: Play track 9 (.8mm). Listen for at least 8 seconds.

CD TEST PROCEDURES

3.4 Fingerprint: Play track 15 (75µm).

Listen for at least 10 seconds.

Page 33

Figure 13. Digital PCB Adjustment Locations

Page 34

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 Parts 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.

4. This PCB is part of a pallet. The pallet contains the Display PCB, Audio PCB, and Head- phone PCB. This PCB assembly is manufactured and sold as a pallet.

PARTS LIST NOTES

Page 35

CONSOLE ASSEMBLY PARTS LIST

(Figure 14)

Item

Number

Description Part Number Note

1 Door Assembly 187743-001 2 Spring-Torsion, LH 176083 3 Spring-Torsion, RH 176082 4 Pin-Hinge, 5.3" 173210 5 Gear-Damper, Blue 146816-05 6 Cover Assembly, Right 149956 7 Cover Assembly, Left 190819 8 Nameplate, Flat Black 180213 9 Spring, Ground 173449

10 PCB Assembly, 120V

PCB Assembly, 220V PCB Assembly, 120V/220V

146075-101A 146075-201A 146075-601A

1, 2, 4

11 CD Mechanism, CD90V1, W/APC 146074 12 Cover, CD Mechanism 148787 13 Screw-Tapp, 2 x 6 mm, PAN, XREC 149954-04 14 Grommet, CD Support, Violet 146822-02 15 Grommet, CD Support, Gray 146822-01 16 Latch, Console 146081 17 Spacer, Foam, Rectangular, .25 172332-04 18 Screw-Tapp, 6-20 x .375, PAN, XRC/S 172779-06 19 Base Assembly 149955-01 20 Cable, 5 conductor, 8" 172599 21 Cable, 8 conductor, 8" 172673 22 Pad, Foam, Adhesive Backed 174231

Page 36

Figure 14. Exploded View

Page 37

REMOTE CONTROL ASSEMBLY PARTS LIST

(Figure 15)

Figure 15. RC5 Exploded View

Item

Number

Description Part Number Note

1 PCB ASSY RMT CNTRL, RC-5A 194387 1, 2 2 MAT, SWITCH, CD-5 146088 3 COVER, BOTTOM, CD-5 146089 4 COVER, TOP, CD-5 146090 5 DOOR, BATTERY, CD-5 146226 6 CONTACT, BATTERY, CONE 174001 7 CONTACT, BATTERY, FLAT 174000 8 CONTACT, BATTERY, CONE/FLAT 174002-01 9 CONTACT, BATTERY, FLAT/CONE 174002-02

10 SPACER, PAD, FOAM 173605

Page 38

ELECTRICAL PART LIST

Resistors

Reference

Designator

Description Part Number Reference

R1, 4, 113, 213, 330, 333, 336, 342, 348, 353, 145, 406, 420-423, 426, 427, 431, 433-442, 502, 503, 553, 572, 598, 600

1kΩ, 5%, 1/10W, 0805

133626-1025

US/Can.

R2, 315

5.11kΩ, 1%, 1/10

0805

133625-5111

R3, 109, 111, 209, 211

4.75kΩ, 1%, 1/10

0805

133625-4751

R5 2.7Ω, 5%, 1/2W,

52mm, CF

121243-1512R75

R6 10Ω, 5%, 1W,

Metallic Oxide

173314-1005

R7 1.5kΩ, 5%, 1/4W,

52mm, CF

121243-1211525

R8 1.5Ω, 5%, 1W,

Metallic oxide

171259-1R55

R9 220Ω, 5%, 1/4W,

52mm, CF

121243-1212215

R10 75Ω, 5%, 1/4W,

52mm, CF

121243-1217505

R12 27Ω, 5%, 1/10W,

0805

133626-2705

R101, 102, 201, 202

9.76kΩ, 1%, 1/10

0805

133625-9761

R103, 203, 588, 592 1kΩ, 1%, 1/10W,

0805

133625-1001

R104, 105, 204, 205

15.4kΩ, 1%, 1/10

0805

133625-1542

R106, 107, 110, 114, 139, 206, 207, 210, 214, 407, 415, 424, 425, 545, 566, 568, 575, 577, 589, 593, 595

100kΩ, 5%, 1/10W, 0805

133626-1045

R108, 208

12.4kΩ, 1%, 1/10

0805

133625-1242

R112, 212

22.1kΩ, 1%, 1/10

0805

133625-2212

R115, 215

825Ω, 1%, 1/10

0805

133625-8250

R116, 117, 119, 120, 123-125, 127, 130-133, 216, 217, 219, 220, 223-225, 227, 230-233, 318, 331, 337, 323, 327, 335, 356, 357, 410, 414, 509, 524, 560, 580, 603

4.7kΩ, 5%, 1/10W, 0805

133626-4725

R118, 218

619Ω, 1%, 1/10

0805

133625-6190

Page 39

ELECTRICAL PART LIST

Resistors (Continued)

Reference

Designator

Description Part Number Note

R121, 128, 221, 228 432Ω, 1%, 1/10W,

0805

133625-4320

R122, 129, 222, 229 182Ω, 1%, 1/10W,

0805

133625-1820

R126, 226 150Ω, 1%, 1/10W,

0805

133625-1500

R134-136, 142, 599, 601

1MΩ, 5%, 1/10W, 0805

133626-1055

R138, 304, 309, 325, 338, 341, 358

10kΩ, 5%, 1/10W, 0805

133626-1035

R140, 303, 308, 552 330kΩ, 5%, 1/10W,

0805

133626-3345

R141, 522, 557, 578 33kΩ, 5%, 1/10W,

0805

133626-3335

R143 30kΩ, 5%, 1/10W,

0805

133626-3035

R144, 569 1.8kΩ, 5%, 1/10W,

0805

133626-1825

R145 3.3kΩ, 5%, 1/10W,

0805

133626-3325

Military (120/230V)

R145, 302, 307, 504, 565

2.2kΩ, 5%, 1/10W, 0805

133626-2225

Eur./UK/Sing./Aus.

R300, 525, 540 1.2kΩ, 5%, 1/10W,

0805

133626-1225

R301 220Ω, 5%, 1/10W,

0805

133626-2215

R305, 310, 313, 507 2.7kΩ, 5%, 1/10W,

0805

133626-2725

R306, 311, 516 5.6kΩ, 5%, 1/10W,

0805

133626-5625

R314, W302, W401 Jumper, Chip, 0805 133627 R316 12kΩ, 5%, 1/10W,

0805

133626-1235

R317 8.2kΩ, 5%, 1/10W,

0805

133626-8225

R319 22Ω, 5%, 1/10W,

0805

133626-2205

R320

9.10kΩ, 5%, 1/10

0805

133626-9125

R322, 345, 350, 530-533, 548-551, 555

22kΩ, 5%, 1/10W, 0805

133626-2235

R324 43Ω, 5%, 1/4W,

52mm, CF

121243-1214305

R326 100Ω, 5%, 1/10W,

0805

133626-1015

R328 1.6kΩ, 5%, 1/10W,

0805

133626-1625

R329 620Ω, 5%, 1/10W,

0805

133626-6215

R332, 535 6.8kΩ, 5%, 1/10W,

0805

133626-6825

R334 Potentiometer, 10kΩ,

10%, 1/2W

170042-103

Page 40

ELECTRICAL PART LIST

Resistors (Continued)

Reference Designator

Description Part Number Note

R339, 558 Potentiometer, 20kΩ,

10%, 1/2W

170042-203

R340 120Ω, 5%, 1/10W,

0805

133626-1215

R343, 501 10Ω, 5%, 1/10W,

0805

133626-1005

R344, 346, 349, 351, 429, 430, 561, 582

330Ω, 5%, 1/10W, 0805

133626-3315

R347, 352 18kΩ, 5%, 1/10W,

0805

133626-1835

R354

1.05kΩ, 5%, 1/10

0805

133625-1051

US/Can./Mil.

R354 1.5kΩ, 5%, 1/10W,

0805

133626-1525

Eur./UK/Sing./Aus.

R401-405, 411, 413, 416-419, 432, 505, 521, 526, 554, 562, 576, 594

10kΩ, 5%, 1/10W, 0805

133626-1035

R408, 538 120kΩ, 5%, 1/10W,

0805

133626-1245

R409, 514, 517 390kΩ, 5%, 1/10W,

0805

133626-3945

R412, 543, 544, 546, 547

27kΩ, 5%, 1/10W, 0805

133626-2735

R428, 556, 563, 581, 583-585, 596, 597

470Ω, 5%, 1/10W, 0805

133626-4715

R506, 527 Potentiometer, Trim,

5kΩ, 10%, 1/2W

170042-502

R508, 542 220kΩ, 5%, 1/10W,

0805

133626-2245

R510 Potentiometer, Trim,

2kΩ, 10%, 1/2W

170042-202

R511 Potentiometer, Trim,

100kΩ, 10%, 1/2W

170042-104

R512, 528, 574 4.7MΩ, 5%, 1/10W,

0805

133626-4755

R513

15kΩ, 5%, 1/10

0805

133626-1535

R515, 559 3.9kΩ, 5%, 1/10W,

0805

133626-3925

R518

150kΩ, 5%, 1/10

0805

133626-1545

R519 62kΩ, 5%, 1/10W,

0805

133626-6235

R520

1.5MΩ, 5%, 1/10

0805

133626-1555

R523, 539, 571 56kΩ, 5%, 1/10W,

0805

133626-5635

R534 3.3kΩ, 5%, 1/10W,

0805

133626-3325

R536

82kΩ, 5%, 1/10

0805

133626-8235

Page 41

ELECTRICAL PART LIST

Resistors (Continued)

Reference

Designator

Description Part Number Note

R537 160kΩ, 5%, 1/10W,

0805

133626-1645

R541

91kΩ, 5%, 1/10

0805

133626-9135

R567

200kΩ, 5%, 1/10

0805

133626-2045

R570

68kΩ, 5%, 1/10

0805

133626-6835

R573, 579 270kΩ, 5%, 1/10W,

0805

133626-2745

R586, 587, 590, 591

2.21kΩ, 1%, 1/10

0805

133625-2211

R602 3.9MΩ, 5%, 1/10W,

0805

133626-3955

R604 56Ω, 5%, 1/2W, CF 121243-1515605

Capacitors

Reference

Designator

Description Part Number Note

C 1 .01µF, 20%, 100V,

Z5U, Disc

146821-103

C2, C13 2200µF, 20%, 25V,

85, EL

149948-222E

C3, 4, 7, 8, 10, 12, 20, 114, 214, 310, 345

10µF, 20%, 50V, 85, EL

149948-100H

C5, 100, 107, 112, 207, 212, 313, 336 412, 413, 523

100pF, 5%, 50V, COG, 0805

133622-101

US/Can./Mil.

C 6 470µF, 20%, 25V,

85, EL

149948-471E

C9, 11 1000µF, 20%, 16V,

85, EL

149948-102C

C14, 17, 18, 116, 216, 330

100µF, 20%, 25V, 85, EL

149948-101E

C15, 16 100µF, 20%, 50V,

85, EL

149948-101H

C19 33µF, 20%, 25V,

85, EL

149948-330E

C101, 102, 201, 202, 354, 533

180pF, 5%, 50V, COG, 0805

133622-181

C103, 104, 117- 120, 203, 204, 217- 220, 337, 349, 401, 411, 502, 539

1000pF, 5%, 50V, COG, 0805

133622-102

C105, 109, 111, 129, 205, 209, 211, 308, 311, 333, 414

1µF, 20%, 50V, 85, EL

149948-1R0H

C106, 206 47pF, 5%, 50V,

COG, 0805

133622-470

C108, 208, 328 2.2µF, 20%, 50V,

85, EL

149948-2R2H

Page 42

ELECTRICAL PART LIST

Capacitors (continued)

Reference Designator

Description Part Number Note

C110, 210, 302, 305, 342

4.7µF, 20%, 50V, 85, EL

149948-4R7H

C113, 213, 301, 324, 331, 346

47µF, 20%, 25V, 85, EL

149948-470E

C115, 215 22µF, 20%, 25V,

85, EL

149948-220E

C121, 130, 133, 134, 221, 314, 326, 327, 335, 403, 534, 535, 574

.01µF, 10%, 50V, X7R, 0805

133623-103

C122-127, 132, 135, 332, 402, 407, 408, 518, 520, 528, 537, 545, 546, 553, 555, 568, 570-573, 575

.10µF, 80%, 25V, Y5V, 0805

133624

C300, 316, 319, 321, 323, 325, 329, 334, 341, 343, 347, 348, 350-353

.047µF, 20%, 50V, Z5U, 0805

148779-473

C303, 306, 317 3.3µF, 20%, 50V,

85, EL

149948-3R3H

C304, 307 .0056µF, 5%, 100V,

85, Box

137127-562

Eur./UK/Sing./Aus.

C304, 307 .0082µF, 5%, 100V,

85, Box

137127-822

US/Can./Mil.

C309, 313 470pF, 5%, 50V,

COG, 0805

133622-471

Eur./UK/Sing./Aus.

C309, 405, 406, 548, 549

39pF, 5%, 50V, COG, 0805

133622-390

US/Can./Mil

C312, 524 .33µF, 5%, 50V,

85, Box

137127-334

C315 6800pF, 10%, 50V,

X7R, 0805

133623-682

C318, 556, 557 16pF, 5%, 50V,

COG, 0805

133622-160

C322 220µF, 20%, 25V,

85, EL

149948-221E

C339 33pF, 5%, 50V,

COG, 0805

133622-330

C340 27pF, 5%, 50V,

COG, 0805

133622-270

C344, 505, 516, 540 .1µF, 5%, 50V,

85, Box

137127-104

C404 .22µF, 20%, 50V,

85, EL

149948-R22H

C415 .47µF, 20%, 50V,

85, EL

149948-R47H

C501, 512, 529, 538, 554, 559, 561

47µF, 20%, 16V, 85, EL

149947-470C

C503, 506, 513, 527 10µF, 20%, 25V,

85, EL

149947-100E

C504 .01µF, 5%, 100V,

85, BOX

137127-103

Page 43

ELECTRICAL PART LIST

Capacitors (continued)

Reference

Designator

Description Part Number Note

C507 560pF, 5%, 50V,

COG, 0805

133622-561

C508 1µF, 20%, 50V,

EL, 85, BP

147522-1R0

C509 .018µF, 5%, 100V,

85, Box

137127-183

C510 .47µF, 20%, 50V,

EL, 85, BP

147522-R47

C511, 514, 525, 542, 543

.033µF, 5%, 63V, 85, Box

137127-333

C515 .068µF, 5%, 63V,

85, Box

137127-683

C519, 521, 526 100µF, 20%, 16V,

EL, 85

149947-101C

C522, 562, 565 .0033µF, 5%, 100V,

85, Box

137127-332

C530 12pF, 5%, 50V,

COG, 0805

133622-120

C531 2.7pF, 5%, 50V,

COG, 0805

133622-2R7

C532 .47µF, 20%, 50V,

85, EL

149947-R47H

C536 .033µF, 10%, 50V,

X7R, 0805

133623-333

C541 220pF, 5%, 50V,

COG, 0805

133622-221

C544 390pF, 5%, 50V,

COG, 0805

133622-391

C547, 558, 564, 567 1µF, 20%, 50V,

85, EL

149947-1R0H

C563, 566 .0015µF, 5%, 100V,

85, Box

137127-152

Diodes

Reference

Designator

Description Part Number Note

D1-4, 6-8, 301 Rectifier, 1N4004,

400V, 1A

116996-4

D5 LED, Green,

Rt. Angle Mount

147551

D9 Zener, 1N5252,

24V, .5W, 5%

136758-5252

D10 Zener, 1N5239,

9.1V, .5W, 5%

136758-5239

D101-109, 201-206, 302, 303, 401, 502, 503

1N4148, 75V, 300mA, Switching

121501

D402-405 Switch, 75V,

200mA, SOT-23

148582

D406 Zener, 1N5246,

16V, .5W, 5%

136758-5246

Page 44

Diodes (continued)

ELECTRICAL PART LIST

Transistors

Reference Designator

Description Part Number Note

Q1 Bipolar, P, 60V,

5A, TO-126

147529-S

Q101-107, 201-207 Bipolar, N, 50V,

800mA, SOT23

148770

Q2, 3, 5, 301, 302, 401, 502

Bipolar, N, 40V, 200mA, SOT23

146819

Q300 JFET, N, 20V,

20mA, TO-92

148590-F

Q304 Bipolar, N, 60V,

200mA, TO-92

146812-T

Q305 JFET, N, 40V,

10mA, TO-92

147561-3

Q307-310 Bipolar, N, 30V,

30mA, TO-92

147565

Q312, 405, 500 Bipolar, N, 50V,

100mA, SOT23

146817

Q4, 311, 501 Bipolar, P, 40V,

200mA, SOT23

148596

Q402-404 Bipolar, P, 50V,

100mA, SOT23

146818

Integrated Circuits

Reference Designator

Description Part Number Note

U101 Analog Switch,

TC9163N, DIP28

146814

U102, 507 Op-Amp, Quad,

NJM074, DIP14

146078

U103 Volume Control,

TC9213P, DIP16

147622

U104 Op-Amp, Dual,

NJM4556, SO-8

148598

U105 Op-Amp, Dual,

NJM2082M, SO-8

146820

U106 Comparator, Dual,

LM393, SO-8

148584

U301 Digital Tuner,

LA1851, DIP30

146815

U302 Frequency

Synthesizer, PLL, LM7000, DIP20

147527

Reference Designator

Description Part Number Note

D407 Zener, 1N5232,

5.6V, .5W, 5%

136758-5232

D504 Zener, 1N5231,

5.1V, .5W, 5%

136758-5231

D505 Zener, 1N4742A,

12V, 1W, 5%

116995-4742A

Page 45

ELECTRICAL PART LIST

Integrated Circuits (continued)

Reference

Designator

Description Part Number Note

U401 EEPROM,

59C11, 1 KB, SO-8

147536

U402 Microcontroller,

68HC05C12, Programmed

178324

U403 VFD Driver,

MM58342, DIP28

146813

U501 ASP, LA9210M,

DIP80

146809

U502 DSP, LC7867,

DIP64

146810

U503, 504 Motor Driver,

LA6531, DIP16

146808

U505 Microcontroller,

68HC05P7, SO-28, Programmed

146806

U506 DAC, LC7883M,

16 bit, SO-28

146811

VR1 Regulator, 12V,

Neg., LM320LZ, TO-92

147530-12

VR2 Regulator-Voltage,

Pos., 8V, TO-92

171406-08

VR3 Regulator-Voltage,

Pos., 5V, TO-92

171406-05

Inductors

Ceramic Filter

Reference

Designator

Description Part Number Note

L1, 400, 501, 504, 506

10µH, 160A,

7.96Hz

147563-100

L101, 505 1µH, 270A, 25.2Hz 147563-1R0 L301 1000µH, 40A,

.796Hz

147563-102

L302-304 100µH, 90A,

2.52Hz

147563-101

L502, 503 Inductor, 4.7µH,

10%

147563-4R7

L507 Inductor, 2.2µH,

SMD

173273-2R2

Reference

Designator

Description Part Number Note

CF301 Resonator,

Ceramic, 456kHz

147233

CF302-304 Filter, Ceramic,

10.7MHz, 230kHz

147559

Eur./UK/Sing./Aus.

CF302-304 Filter, Ceramic,

10.7MHz, 280kHz

173107

US/Can./Mil.

Page 46

ELECTRICAL PART LIST

Crystals

Tuning Coils

Miscellaneous

Reference

Designator

Description Part Number Note

X301 Crystal, Quartz,

7.2MHz, 50 PPM

147223

X401, 502 Resonator,

Ceramic, 4MHz

147534

X501 Crystal,

16.93444MHz, 100 PPM

147533

Reference

Designator

Description Part Number Note

RR101 Receiver, RF

Remote, 27.145MHz

148588

J6A Connector,

Header, 5 pos.

148591-05

Cable, 24 AWG, 5 conductor,

2.5 mm, 3"

148772-0503

J7A Connector,

Header, 12 pos.

148591-12

J7B Cable, 24 AWG,

12 conductor,

2.5 mm, 3"

148772-1203

J9A Connector,

Header, 9 pos.

148591-09

J9B Cable, 24 AWG,

9 conductor,

2.5 mm, 3"

148772-0903

Reference

Designator

Description Part Number Note

T301, 302 Filter, Stereo MPX,

Single-tuned

147236

T303 Module, Tuning,

AM, Front End

172972

T304 Inductor, FM

Detector, Distortion Adj., 10.7MHz

147557

T305 Inductor, FM

Detector, Center Adj., 10.7MHz

147564

T306 Filter, FTZ, 114kHz 147558

Eur./UK/Sing./Aus.

T307 Inductor, AM IF,

High Selectivity, 450kHz

148581

TUNER Tuner, Front, FM,

4-gang

140088

US/Can./Mil.

TUNER Tuner, Front, FM,

4-gang

140089

Eur./UK/Sing./Aus.

Page 47

Miscellaneous (continued)

ELECTRICAL PART LIST

Reference

Designator

Description Part Number Note

J101, 102 Connector, Jack,

Quad Phono

149959

J103 Connector, Jack,

Phono, 6 pos.

148766

J104 Connector, Jack,

Headphone,

3.5mm

148583

J105A-B, 105B-A Cable, 26 AWG,

5 conductor, 2 mm, 13"

148771-0513

J301 Connector,

Antenna, F/SCR Terminal

148586 US/Can./Mil.

J301 Connector,

Antenna, PAL

171623 Eur./UK/Sing./Aus.

J401 Connector, Dual

Stereo, Mini

145310

P1 Connector, Jack,

DC Power

147540

P401 Connector,

Header, 3 pin

148595-03

P501 Connector,

Header, 6 pin, Male

134740-06

P502 Connector,

Header, 8 pin, Male

134740-08

P503 Cable, 6

conductor, 3", 28AWG

172162-0603

P504 Connector,

Header, 8 pos.

148591-08

S501 Switch, Optical 171258 S401-415 Switch, Tactile

Dome, 160 gf

172999-02

VFD401 Display, Vacuum

Fluorescent

146077

Page 48

RC5 ELECTRICAL PART LIST

Resistors

Capacitors

Reference

Designator

Description Part Number Note

R2-5,13, 21-23 200kΩ, 5%, 1/10W,

0805

133626-2045

R6, 9 100kΩ, 5%, 1/10W,

0805

133626-1045

R7 470kΩ, 5%, 1/10W,

0805

133626-4745

R8 4.7kΩ, 5%, 1/10W,

0805

133626-4725

R10 2.7kΩ, 5%, 1/10W,

0805

133626-2725

R11 1kΩ, 5%, 1/10W,

0805

133626-1025

R12 680Ω, 5%, 1/10W,

0805

133626-6815

R14 130kΩ, 5%, 1/10W,

0805

133626-1345

R15 180kΩ, 5%, 1/10W,

0805

133626-1845

R16 560Ω, 5%, 1/10W,

0805

133626-5615

R17 220kΩ, 5%, 1/10W,

0805

133626-2245

R18 150kΩ, 5%, 1/10W,

0805

133626-1545

R19 10kΩ, 5%, 1/10W,

0805

133626-1035

R20 4.3kΩ, 5%, 1/10W,

0805

133626-4325

Reference

Designator

Description Part Number Note

C1 330pF, 5%, 50V,

COG, 0805

133622-331

C 2 0.033µF, 10%, 50V,

X7R, 0805

133623-333

C3, 4, 6 100pF, 5%, 50V,

COG, 0805

133622-101

C 5 .10µF, 80%, 25V,

Y5V, 0805

133624

C7 10µF, 20%, 25V,

85, EL

148769-100E

C8 .047µF, 20%, 50V,

0805, Z5V

148779-473

C10 120pF, 5%, 50V,

COG, 0805

133622-121

C12 270pF, 5%, 50V,

COG, 0805

133622-271

C13, 18, 25 .022µF, 10%, 50V,

X7R, 0805

133623-223

C14 10pF, 5%, 50V,

COG, 0805

133622-100

Page 49

RC5 ELECTRICAL PARTS LIST

Capacitors (continued)

Diodes

Transistors

Integrated Circuit

Reference

Designator

Description Part Number Note

C16 33pF, 5%, 50V,

COG, 0805

133622-330

C17 27pF, 5%, 50V,

COG, 0805

133622-270

C19 56pF, 5%, 50V,

COG, 0805

133622-560

C20 22pF, 5%, 50V,

COG, 0805

133622-220

C21 39pF, 5%, 50V,

COG, 0805

133622-390

C22 68pF, 5%, 50V,

COG, 0805

133622-680

C23 560pF, 5%, 50V,

COG, 0805

133622-561

C24 27pF, 5%, 100V,

T2H, 0805

147531-270

C26 1000pF, 5%, 50V,

COG, 0805

133622-102

TC1 2-7pF, 100V, NPO,

Trim Capacitor

148768-Z070

Reference

Designator

Description Part Number Note

D2, 4, 5 Switch, 75V,

200mA, SOT23

148582

D3, 6, 7 Dual, 75V, 300mA,

SOT23

148774

Reference

Designator

Description Part Number Note

Q1, 3 Bipolar, 40V,

200mA, P, SOT23

148596

Q2 Bipolar, 40V,

200mA, N, SOT23

146819

Q4, 5 Bipolar, 30V,

30mA, N, SOT23

148781-4

Q6 Bipolar, 20V,

1.5A, N, SOT23

148780-7

Reference

Designator

Description Part Number Note

U1 RC Transmitter,

SO-24

148784

U2 Monostable

Multivibrator, CD4538, SO-16

148785

Page 50

RC5 ELECTRICAL PARTS LIST

Miscellaneous

Reference

Designator

Description Part Number Note

- Connector receptacle, Battery contact (2 in qty.)

171982

L2, 5, 6, 9 10µH, 160A,

7.96Hz, Axial

147563-100

L3 6.8µH, 175A,

7.96Hz, Axial

147563-6R8

L4 1.2µH, 260A,

7.96Hz, Axial

147563-1R2

L7 .47µH, 330A,

25.2Hz, Axial

147563-R47

L8 Bar antenna,

1.15µH, 5%

148786

SW1 Switch, DIP, SPST,

16 DIP, 8 position

148777

T1 Inductor, 27.145MHz 148778 X1 Resonator,

Ceramic, 455kHz

148782

X2 9.04833MHZ,

35PPM

148783

Page 51

PACKAGING PART LIST

Figure 16. Packaging Exploded View

Item

Number

Description Part Number Note

1 Remote Control Assembly (RC5A)

Remote Control Assy Packaged for Resale

179980 172724

2 Polybag (Remote) 144348 3 Wire Cover 173201 4 Power Supply, 120V (US/Can.)

Power Supply, 220V (Eur.) Power Supply, 230V (UK/Sing.) Power Supply, 240V (Aus.)

146225 146798 146799 146800

5 Batteries-AA size 147538 6 Packing-Insert, Top 147539 7 Antenna-FM Dipole, 75Ω, F connector

(US/Can., Mil.) Antenna-FM Dipole (Eur./UK/Sing./Aus.)

148589 143185

8 Microfoam Bag 174591

9 Antenna, AM Loop 147544 10 Packing, Insert, Bottom 147543 11 Carton, Shipping 148767

- Shipping Carton Kit 179730

Page 52

# 181473

Product: CD5 Subject: Micro Reset Modification Symptom: Customer complains of CD not working. Reason: CD micro is not resetting under certain conditions. Solution: Perform reset modification listed below to display PCB.

1) Remove: R408 (120k), C414 (1uf), R573 (270k), C547 (1uf), D502.

2) Add a jumper wire from the hot side of S416 to hot side of S502. This wire should not be

excessively long, and should lay flat on the board. (See diagrams below) Note: Latter production units used an improved reset circuit (U404). U404 is located on the display PCB under the BOSE

logo. This modification is not needed on these units.

Page 53

# 177871-B1

Product: CD-5 Subject: Display Failure Symptom: Flashing VFD displays are being observed on CD-5 units. Reason: The existing ground trace breaks at the pad leaving no ground. This change

affects PCB P/N 177400 and has been added to all production units starting the week of 12/17/95.

Solution: Repair ground trace.

1. Refer to the disassembly/ assembly procedures to access the Digital PCB.

2. Compare the PCB to the figure below. If a piece of jumper buss wire is present from the

VFD Support tab (closest to pin 21 of U402) to the ground trace, the modification has been done. If it is not present, proceed to step 3.

3. Scrape the ground trace a 1/4" from the VFD Support tab until the copper is visible.

4. Install a jumper buss wire from the VFD Support tab to the broken ground trace. Be sure

to wrap the wire around the tab once or twice before soldering it to the ground trace.

Page 54

CD5 Power Supply

TO VFD

SHT 2

J7-2

J7-12

NOTE 24

229

214

558

231 232

233 2

538

+5V

-24V

4.5VAC

-15V

D10

1N5239

9.1V

R10

120,1/4W

10,1W

C18

100/25V

C17

100/25V

MMM

C16

100/50V

C19

33/63V

C15

100/50V

220

1/4W

1N4004

+5V

VR3

LM78M05CT

C14

100/25V

1N4004

C12

10/50V

C11

1000/16V

R19

220,1W

1N5252

24V

Date issued: 6/17/97

174798-B1

Product: Lifestyle

CD5

Subject: Dim VFD Display Effective Date: 8/27/96

Symptom: Dim VFD Display. Reason: Improper voltage rating on C19. Solution: Replace C19 with a 33uF, 63V capacitor, part number 149948-3301J.

The display dims on some units, after the unit has been in use for a period of time. When a unit is returned from the field for service, C19 should be checked to ensure that the voltage rating on C19 is 63V. If it is not, it should be replaced with a 33uF, 63V capacitor, part number 149948-3301J. This should be done to all units returned for service to ensure this failure does not occur in the future. Refer to the schematic below, the CD5 service manual, part number 174798, and the CD5 supplement, part number 177871, for schematics, PCB layouts and disassembly procedures.

Page 55

CD5 TROUBLESHOOTING GUIDE

Symptom Probable Cause Solution Service

Bulletin

Hum C2, physical damage Replace C2 Intermittent or no operation P1, fractured solder joint or

lifted pad

Repair fractured solder joint

or lifted pad. No operation Q2, 3, 4, 5 failed Replace Q2, 3, 4, 5. Display Dim C19 voltage under rated Replace C19 with a 33uF,

63V cap part number

149948-3301J.

174798-B1

Display Flashes Ground break at VFD

support tab

Repair ground break at VFD

support tab located near

U402, pin 21.

177871-B1

Will not track or focus. CD mechanism not the problem

U503 or U501 Ensure U501 and 503 is

properly soldered. Check

U501 and 503 for proper

operation. No laser output Solder short across C502 Remove solder short from

C502 and check Q501. One or more of the unit's functions do not operate using controls on center but work with remote

Defective switch Replace switch.

No remote control operation Remote control receiver not

properly soldered

Remove solder from legs of

remote receiver and scrape

legs and then solder No FM X301 defective Replace X301 No audio output U101 (multiplex IC)

defective

Replace U101 Distorted output, CD only Defective U506 (D/A

converter) or poor solder connection

Ensure U506 is properly

soldered or replace U506 Customer complains that

CD does not operate. CD operates after unit is unplugged and plugged in again.

CD micro is not resetting under certain conditions

See service bulletin 181473

for reset modification

procedures.

181473

CD will not operate. C13, located in the power

supply, has a bad connection causing low voltage on pin 1 (≈ 14V) and pin 16 (≈ 4V) of U503 or U504.

Repair fractured solder joint

or damaged track.

Page 56

CD5 VOLTAGES AND WAVEFORMS

Power Supply Section Voltages (Reference Designators 0-99)

Node Voltages Units Test Condition

Min. Typical Max. P1 pin 1 (AC power in)

13.0 VRMS FM on

D1 Cathode 14.5 VDC FM on C3+ (+10V supply) 9.4 10.3 11 VDC FM on C3+ (+10V supply) 0.0 VDC Unit off D2 Anode -17.9 VDC FM on C8- (-12V supply) -12.8 -12.0 -11.2 VDC FM on C8- (-12V supply) 0.0 VDC FM on C4+ 0.0 VDC Unit off D6 Cathode (M+ supply)

14.25 VDC FM on

D3 Cathode 11.5 13.6 14.8 VDC FM on C10+ (+8V supply) 7.5 8.0 8.5 VDC FM on D4 Cathode 9.2 10.4 12.4 VDC FM on C12+ (+5V supply) 4.7 5.0 5.3 VDC FM on D9 Anode (-24V supply)

-26.5 -24.5 -22.3 VDC FM on

C18- (VFD heater) -15.3 VDC FM on C19- (VFD heater) -15.3 VDC FM on Across VFD heater 2.6 4.3 VRMS FM on

Audio Section Voltages (Reference Designators 100-299)

Remote Control Voltages

Node Voltages Units Test Condition

Min. Typical Max. Q1 C 4.50 VDC Button pressed Q1 C 0.00 VDC Remote off Q3 C 0.00 VDC Remote off Q4 B 1.25 VDC Button pressed Q4 E .62 VDC Button pressed

Node Voltages Units Test Condition

Min. Typical Max. J8 pin 8 -10.7 VDC FM on J8 pin 8 +4.9 VDC Unit off J8 pin 6 -10.7 VDC A unmuted J8 pin 6 +4.9 VDC A muted J8 pin 7 -10.7 VDC B unmuted J8 pin 7 +4.9 VDC B muted

Page 57

CD5 VOLTAGES AND WAVEFORMS

Microcontroller Section Voltages (Reference Designators 400-499)

Node Voltages Units Test Condition

Min. Typical Max. U402 Pin 40 (Vdd) 5.0 VDC U402 Pin 35 (reset)

4.8 VDC

U402 Pin 36 4.9 VDC

Tuner Section Voltages (Reference Designators 300-399)

Node Voltages Units Test Condition

Min. Typical Max. Q301 E 4.3 VDC FM on Q301 C 6.9 VDC FM on Q302 E 4.3 VDC FM on Q302 C 6.9 VDC FM on C346+ 9.5 VDC FM on Q311 C (FM B+) 10.2 VDC FM on Q308 E 3.3 VDC FM on Q308 C 8.6 VDC FM on Q310 E 3.3 VDC FM on Q310 C 8.6 VDC FM on Q300 S .55 VDC FM on U301 Pin 28 (Vreg) 2.1 2.3 2.6 VDC FM on U301 Pin 5 (AM det out) 0.83 VDC FM on U301 Pin 7 (FM Disc) 8.30 VDC FM on U301 Pin 8 (FM det out) 3.15 VDC FM on U301 Pin 14 (Lout) 4.8 VDC FM on U301 Pin 15 (Rout) 4.8 VDC FM on Q305 S 2.1 VDC FM on

Page 58

CD5 VOLTAGES AND WAVEFORMS

CD Section Voltages (Reference Designators 500-699)

Node Voltages Units Test Condition

Min. Typical Max. U501 pin 80 (Vref1) 1.6 VDC CD on U501 pin 8 (Vref2) 3.6 4.0 4.4 VDC CD on U501 pin 9 (Vref3) 3.6 4.0 4.4 VDC CD on U501 pin 7 (TEAO) 4.0 VDC CD on U501 pin 15 (TPAO) 4.0 VDC CD on U501 pin 21 (TDO) 4.0 VDC CD on U501 pin 22 (FDO) 4.0 VDC CD on U501 pin 26 (FEAO) 4.0 VDC CD on U501 pin 31 (SPDO) 4.0 VDC CD on U501 pin 33 (SLDO) 4.0 VDC CD on P501 pin 4 (A+C) 1.6 VDC CD on P501 pin 5 (B+D) 1.6 VDC CD on P501 pin 2 (E) 4.0 VDC CD on P501 pin 1 (F) 4.0 VDC CD on P502 Pin 1 (LD) 1.9 VDC CD on U505 pin 1 (reset) 4.8 VDC CD on U505 pin 23 (door sw) 4.8 VDC CD door closed U505 pin 23 (door sw) 0.2 VDC CD door open U502 pin 56 (reset) 4.9 VDC D504 Cathode 4.75 5.0 5.4 VDC U506 VrefH 4.0 4.4 4.75 VDC U507 pin 1 2.2 VDC U507 pin 14 2.2 VDC

Remote Control Waveforms

Node Waveform Bias Level

(VDC)

Amplitude Frequency

(MHz)

Test Condition

U1 pin 10 (sine) 2.2 4.5VPP .455 Button pressed

Q3 C Data -- 4.2VPP -- Button pressed Q4 B Sine 1.1 3.2VPP 9.048 Button pressed Q4 E Sine 0.7 2.8VPP 9.048 Button pressed Q4 C Sine 4.3 2.1VPP 27.145 Button pressed Q5 B Sine+Data 0.3 1.3VPP 27.145 Button pressed Q5 C Modulated

Sine

4.3VPP 27.145 Button pressed

Q6 C Modulated

Sine

3.0VPP 27.145 Button pressed

L7/C23

(TP27)

Modulated

Sine

3.0VPP 27.145 Button pressed

Page 59

CD5 VOLTAGES AND WAVEFORMS

Power Supply Section Waveforms (Reference Designators 0-99)

Node Waveform Bias Level

(VDC)

Amplitude Frequency Test Condition

C18- Sine -15.3 4.3 VPP 50/60HZ Display off C19- Sine -15.3 1.3 VPP 50/60HZ Display off

Microcontroller Section Waveforms (Reference Designators 400-499)

Node Waveform Bias Level

(VDC)

Amplitude Frequency Test Condition

U402 pin 38 Sine 2.2 6.0 VPP 4.0MHz U402 pin 33 Clock pulse -- 0/5V --

D402 Cathode Pulse -- -.5/4.5 V 1.0KHz D403 Cathode Pulse -- -.5/4.5 V 1.0KHz D404 Cathode Pulse -- -.5/4.5 V 1.0KHz D405 Cathode Pulse -- -.5/4.5 V 1.0KHz

Tuner Section Waveforms (Reference Designators 300-399)

Node Waveform Bias Level

(VDC)

Amplitude Frequency Test Condition

U301 pin 13 Sine 6.5 2.4 VPP 456KHz FM on U301 pin 29 Sine 2.3 0.9 VPP 1450KHz AM, 1 MHz U301 pin 26 8.3 -- 450KHz AM, Sig. in U301 pin 30 Sine 0.7 0.8 VPP 1450KHz AM, 1 MHz

U302 pin 7 -- 3.8 VPP 400KHz

FM F.E pin 1 Sine 0.0 0.4 VPP 108.8MHz FM, 98.1 FM F.E pin 4 0.0 -- 10.7MHz FM on

CD Section Waveforms (Reference Designators 500-699)

Node Waveform Bias Level

(VDC)

Amplitude Frequency Test Condition

U501 pin 72 (RFSM)

(Eye

Pattern)

1.45 2.4 VPP -- CD playing

U501 pin 60 VCO

3.8 1.9 VPP 8.64MHz CD playing

U502 pin 2 AO Sine 2.2 4.1 VPP 8.64MHz CD playing U505 pin 26 Sine 2.2 6.0 VPP 4.0MHz U502 pin 59 4M Square -- 0/5 V 4.234MHz CD playing U502 pin 64 Xo Sine 2.2 4.8 VPP 16.93MHz CD playing U502 pin 58 16M 2.1 5.3 VPP 16.93MHz CD playing U506 pin 5 BCLK Square -- 0/5 V 2.117MHz CD playing U506 pin 7 LRCK Square -- 0/5 V 44.1MHz CD playing

Page 60

INTEGRATED CIRCUIT DIAGRAMS

Remote Transmitter

U101

Analog Switch

TC9163N

U103

Volume Control

TC9213P

Page 61

U302

PLL Frequency

Synthesizer

LM7000

U301

AM/FM Tuner

LA1851N

Monostable Multivibrator

CD4538

INTEGRATED CIRCUIT DIAGRAMS

Page 62

T303

AM Front End

Tuning Module

INTEGRATED CIRCUIT DIAGRAMS

TUNER

FM Front End Module

Page 63

U401

EEPROM

59C11

U403

VFD Driver

MM58342

U503, U504

Motor Driver

LA6531

INTEGRATED CIRCUIT DIAGRAMS

Page 64

U402

Microcontroller

68HC05C12

INTEGRATED CIRCUIT DIAGRAMS

Page 65

U501

ASP

LA9210M

INTEGRATED CIRCUIT DIAGRAMS

Page 66

U502

DSP

LC7867

INTEGRATED CIRCUIT DIAGRAMS

Page 67

INTEGRATED CIRCUIT DIAGRAMS

U505

Microcontroller

68HC05P7

U506

D/A Converter

LC7883M

Page 68

TP27

C23

C24

C22

C25

R19

TP26

C19

C20

C17

R20

C21

Q5 R18

C16

R17 C18

C14

TP25

R16 C10 C12

R15 C13

R14

TAPE

TP8

VIDEO

TP9

TUN

AUX

SKIPR

TP15

TP14

SKIPF

TP16

TP6

TP3

TP2

TP7

VOLUP

TP22

TP4

TP18

TP1

TP12

VOLDN

TP10

TP5

MUTE

OFF

C26 Q3

R11

R12

TP13

R23

R13 R21

C6 C5

R22

TP19

TP17 C2 R7

R10

TP24

TP21

SLEEP

TP23

TP11

C1 R6 R8

TP20

BAT-

BAT+

TC1

L7L6L4

C3 C4

1312

Figure 17. RC5 PCB Layout

Page 69

Figure 18. RC5 Schematic

Page 70

SPECIFICATIONS AND FEATURES SUBJECT TO CHANGE WITHOUT NOTICE

Bose Corporation The Mountain Framingham Massachusetts USA 01701

P/N 174798 REV. 01 02/98 FOR TECHNICAL ASSISTANCE OR PART ORDERS, CALL 1-800-367-4008