BOSE AV28 Service Manual

Contents

Safety Information ............................................................................................................................ 2

Electrostatic Discharge Sensitive (ESDS) Device Handling ......................................................... 2

Specifications ................................................................................................................................ 3-5

Theory of Operation ................................................................................................................... 6-28

Disassembly/Assembly ............................................................................................................ 29-30

Setting-up a Computer to Issue TAP Commands ........................................................................ 31

Issuing TAP Commands to the AV28 media center ..................................................................... 32

General Test Procedure Notes.......................................................................................................32

Functional/Performance Verification Tests ............................................................................. 33-34

Adjustment/Performance Verification Procedures ................................................................ 35-37

Figure 1. AM Test Setup .................................................................................................................... 35

Figure 2. Tap Test Cable Part Number 264565 .................................................................................. 38

Part List Notes ................................................................................................................................. 38

Main Part List................................................................................................................................... 39

Figure 3. Exploded View .................................................................................................................... 40

Main PCB 260318-0 Electrical Part List ................................................................................... 41-55

Tuner PCB 260322-1 Electrical Part List ................................................................................. 56-60

Head Unit Packaging Part List ....................................................................................................... 61

Figure 4. Console Packaging ............................................................................................................ 61

Figure 6. Laser Current Measurement Point...................................................................................... 62

Figure 5. DVD Player Rear Panel ......................................................................................................62

Laser Current Measurement ..........................................................................................................62

Integrated Circuit Diagrams ..................................................................................................... 63-67

Changing House Codes ................................................................................................................. 68

Figure 7. House Code Settings ......................................................................................................... 68

Zone 2 Operation ............................................................................................................................ 69

Figure 8. Zone 2 Remote Control Switch Setting ..............................................................................69

Console-Key Special Function Features ...................................................................................... 70

Software Update Information

The software in the AV28 Media center can be updated using a software update CD available from
Bose® service. Refer to procedure 2 on page 70, Console-Key Special Function Features, to
determine the software version of the unit. Contact Bose Service or refer to the Bose service
extranet site for information regarding the latest software revision; click on Lifestyle®music centers
and then AV28 media center. http://serviceops.bose.com

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 SERVICE CENTER OR OWNER OF THE
BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED
FOR ANY OTHER PURPOSE.

1

SAFETY INFORMATION

1. Parts that have special safety characteristics are identified by the symbol on schematics
or by special notes on the parts list. 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 reassembled, 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) 6500 IEC
60065 paragraph 9.1.1. With the unit switch first in the ON position and then in 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 power cord plug in the outlet and
repeat test. ANY MEASUREMENTS NOT WITHIN THE LIMITS SPECIFIED HEREIN INDICATE
A POTENTIAL SHOCK HAZARD THAT MUST BE ELIMINATED 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 2 and 5.2 Megohms. When testing 3 wire products, the resistance measured to
the product enclosure should be between 2 and infinite Meg ohms. Also, the resistance measured
to exposed output/input connectors should be between 4 and infinite Meg ohms. When testing 2
wire products, the resistance measured to exposed output/input connectors should be between 4
and infinite Meg ohms. If it is not within the limits specified, there is the possibility 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.

2

Specifications

Physical Description:

Dimensions: 15.8" W x 11.0" D x 3.5" H (40.1 x 27.9 x 8.9 cm)
Weight: 8.2 lbs. (3.7 kg)
Cover: Aluminum
Base: Molded plastic
Display: Vacuum fluorescent

Inputs:

TAPE: 2 Vrms, maximum
AUX: 2 Vrms, maximum
VCR: 2 Vrms, maximum
TV: 2 Vrms, maximum
Digital: S/PDIF (1 each for TV, VCR, TAPE, and AUX)
Composite video: NTSC or PAL format 1Vppwith sync 75 Ohm
S-Video: Luminance 1Vpp, chrominance 0.3V
Component video: NTSC or PAL 1Vpp with sync on Y
Optical input: S/PDIF digital, mapped to input
FM antenna: 75 Ohm
AM antenna: 12uH
TV sensor: NTSC/PAL/HDTV/480p compatible
Power: 33 Vdc, 2.1mm jack, provided by DCS91 power pack
Serial data port: 3.5mm miniature stereo jack, data in/out
Remote control receiver: RF or IR, user selectable

Outputs:

Speaker Zone 1: S/PDIF and variable analog
Speaker Zone 2: S/PDIF and variable analog
Record L and R: Fixed audio
Record digital: S/PDIF and Optical
Optical output: S/PDIF, -15 to -21 dBm
Composite video: NTSC or PAL 1Vpp with sync 75 Ohm
S-Video: Luminance 1Vpp, Chrominance 0.3V
IR: Controls other manufacturer's IR operated devices,

universal method

FM Tuner:

Tuning range: 87.7 MHz-107.9 MHz
De-emphasis: 75 usec
Channel spacing: 200 kHz
Sensitivity, mono usable: 13 dBf
Stereo, 50 dB quieting: 38 dBf
Signal-to-noise @ 65 dBf: Mono: 74 dBf, Stereo: 70 dBf
Noise ratio @ 65 dBf: Mono: 85, Stereo: 85
Harmonic distortion, 1 kHz, @ 65dBf Mono: 0.3%, Stereo: 0.4%
Capture ratio @ 45 dBf: 2.0 dB
AM rejection @ 45 dBf: 60 dB
Adjacent channel selectivity, 200 kHz,
for both channels, @ 45 dBf:
Alternate channel selectivity, 400 kHz,
for both channels, @ 45 dBF:
Image rejection: 45 dB
RF inter-modulation: 65 dB
Sub-carrier product rejection @ 65 dBf: 55 dB
Frequency response 30 Hz-15 kHz: +1.0 dB
Stereo channel separation @ 1 kHz: 35 dB
Auto stop level (seek): 30 dBf
Mono/Stereo threshold: 40 dBf

13 dB

70 dB

pp

pp

3

Specifications

AM Tuner:

Channel spacing: 10 kHz

Test Parameter Condition 530-

550

kHz
Usable
Sensitivity

dBuV/m

1

,

Nominal 55525049484747
Ambient

61 57 55 55 53 52 52

Limit
Environmental

67 63 61 60 59 58 58

Limit

Nominal 26262723232522Adjacent
Channel
Selectivity

2

, dB

Ambient Limit21212218182017

Nominal 30303030302927Alternate
Channel
Selectivity

2

, dB

Ambient Limit25252525252422

Nominal 35374040404040Image
Rejection

Ambient Limit30323535353535
Ratio, dB
Signal to Noise
Ratio, dB

Nominal 50505050505050

Ambient Limit45454545454545

Environmental

40 40 40 40 40 40 40

Limit
Distortion, %

Nominal 0.6 0.6 0.6 0.6 0.6 0.6 0.6

Ambient

1.4 1.4 1.4 1.4 1.4 1.4 1.4
Limit
Environmental

2.0 2.0 2.0 2.0 2.0 2.0 2.0
Limit
Nominal -3-3-3-3-3-3-3Frequency

Response, dB

Ambient Limit-6-6-6-6-6-6-6

@ 220 Hz, 2.0
kHz
Auto Stop

70 ± 7 65 ± 7 63 ± 7 60 ± 7 54 ± 7 48 ± 7 48 ± 7

Level, dBuV/m

560­590
kHz

600­700
kHz

710­950
kHz

960­1400
kHz

1410­1610
kHz

1620­1710
kHz

Single disc CD/DVD:

Supported formats: DVD video, Audio CD, CD-R, CD-R/W, MP3 CD
CD performance:

Parameter Nominal Limit Test Disc

Defect Tracking (void) 1.0 mm 0.8 mm ABEX test disc TCD-725A

Defect Tracking (black dot) 1.0 mm 0.8 mm ABEX test disc TCD-725R

Defect Tracking (scratch) 1.6 mm 1.0 mm ABEX test disc TCD-721 R

Defect Tracking

75 mm 65 mm ABEX test disc TCD-725R

(finger print)

Defect Tracking

1.0 mm 0.7 mm ABEX test disc TCD-732RA

(warped disc)

Defect Tracking

210 mm 140 mm ABEX test disc TCD-714R

(eccentric disc)

Cueing Time 2 sec 3 sec Phillips TS4, tracks 1-15

4

Specifications

Analog Inputs:

Input level: Full scale output; 2 Vrms maximum, 200 mVrms
Input impedance: 33 k
Input coupling: AC coupled

Analog Outputs:

Output level: 2 Vrms
Output level from FM: 0.6 Vrms
Output level from AM: 0.4 Vrms
Source impedance @ 1 kHz: 220 Ohms
Load impedance: 10 k, 2 k minimum
Output coupling: AC coupled

Headphone Jack:

Connector: Mini stereo jack
Output level: 31 mW at THD <0.15% into a 32 Ohm load

Electrical S/PDIF Input:

Sampling rates accommodated: 32 kHz, 44.1 kHz, 48 kHz
Bits recognized and accepted: 16, 20, 24
Input impedance: 75 Ohms
Input coupling: AC coupled

Optical S/PDIF Input:

Sampling rates accommodated: 32 kHz, 44.1 kHz, 48 kHz
Bits recognized and accepted: 16, 20, 24
Connector: TOSLINK

Electrical/Optical S/PDIF Output:

Sampling rates accommodated: 32 kHz, 44.1 kHz, 48 kHz
Protocol: SDMI (Secure Digital Music Initiative)

Remote Control:

Range: 65 ft (20m)
RF frequency: 27.145 MHz

5

Theory of Operation

1.0 Overview

The AV28 media center is a self-contained DVD/CD/MP3 disc player with an AM/FM tuner for use
with Bose® powered speaker systems. In addition to the two internal sources (DVD/CD and AM/
FM tuner), it allows playing up to four external audio sources: TV, VCR, AUX, and TAPE. A 27MHz,
one-way RF remote control operates the unit without line-of-sight restriction; provisions for infrared
remote control of the media center also exist. An integrated IR Blaster allows limited control of
other manufacturer’s equipment (TV’s, VCR’s and Cable/Satellite Set-Top boxes). The AV28 media
center has two independent audio output zones, accessible through circular DIN connectors in the
back of the product.

The AV28 media center contains five PCBs:

PCB Assembly P/N

Main PCB
IR PCB Part of 260318-0
Headphone PCB Part of 260318-0
Tuner PCB 260322-1
Keypad PCB 254141

260318-0

There are some components shown on schematics whose reference designators end in –NV;
these components are not loaded by manufacturing, but their pads exist on the PCB.

AM / FM

Tuner

Video Path

Audio Path

DVD ROM

Drive

UEI

BlasterIC

VFD

ATAPI

U1

CS9800

DVD Decoder IC

IR

Receiver

Console
Buttons

DRAM

Flash

TV Power

RF Remote

XCVR

Dongle

Power

Supply

Synch

ETAP

Power

Supply

IR Blaster

Board

Block Diagram

6

2.0 Power Supply Electronics

2.1 Architecture

Theory of Operation

Voltage Type PCB Location

Input Outputs

(schematic page)

+33 Linear Power Pack 120VAC +12V, +5.1V, +3.3V
+12 Switching Tuner (3) V_RAW DVD drive, VFD, +10V
+10 Linear Tuner (3) +12 Tuner, Transceiver, Audio path, +8V
+8 Linear Main (9) +10 Video circuits
+5.1 Switching Main (9) V_RAW DVD drive, Audio path, +3.3
+3.3 Switching Main (9) V_RAW Flash, DRAM, U1 I/O & core, misc. logic
+2.5 Linear Main (9) +3.3 U1 PLL circuits

V_RAW is provided to the console by an external power pack and is approximately 33VDC. The
power pack is a linear transformer. In addition to the usual large capacitor and full-bridge diode
rectifier, a PTC thermistor (effectively a reset-able fuse) is contained in the power pack to protect
the unit under fault conditions. V_RAW enters the console on the tuner PCB, passes through an
NTC thermistor to eliminate power supply startup surges, and is fed to the +12V supply and the
flat-flex cable, which feeds it to the +5.1V and +3.3V supplies on the Main PCB.

AC line

voltage

from wall

DCS

9X

Linear

+33V

+12V

SMPS

+5.1V
SMPS

+10V

Linear

+8V

Linear

+3.3V
SMPS

+2.5V
Linear

Power Supply Block Diagram

2.2 Switching Power Supplies

See SD254135 sheet 9 and SD256131 sheet 3 for the power supply circuits.

The switching power supplies are ST L4973D3.3 regulator ICs (U802 and U803 on the Main PCB,
and U301 on the Tuner PCB). The power supplies are designed as step-down Buck converters.
The voltage fed back to the chip on pin 13 determines the output voltage; the chip’s control circuitry
will work to keep this voltage at +3.3V. The +5.1V and +12V supplies use resistor divide-down
networks to obtain the +3.3V feedback voltage.

The reference designators discussed in this section correspond to the +12V regulator on the tuner
board; the designs of the +5.1V and +3.3V regulators are nearly identical. A number of additional
components exist to provide filtering functions.

7

Theory of Operation

IC Pin Components Connected Pin Function

1 R301, C302, C303 Sets switching frequency (when not controlled

externally)
10 C308 Drives internal D-MOS
11 R322 Inhibits supply
12 R302, C305, C307 Lead-lag filter for compensation loop
13 R304, R305 Voltage feedback for control
18 C304 +5.1V for external reference
19 C306 Sets supply soft-start time constant
20 None Supply frequency switching synchronization

(see note)

2.3 Supply Synchronization Generator

To limit radiated noise, all three switching supplies (12V, 5V and 3.3V) are synchronized to the
same control frequency. This frequency is varied by U1, as needed, to keep noise out of the AM
tuner.

U805 is a 74HC592 8-bit binary counter IC with an input register. An 11.2896 MHz clock signal is
fed to the counter clock (CCK) pin, and the chip counts on positive edges of this signal. Inputs A
through H are loaded to the register on positive edges of the register clock (RCK) signal, and the
register outputs are loaded to the counter when the active-low counter load (/CLOAD) is asserted.
These two signals are driven by the chip’s own active-low ripple carryout (/RCO), which is also the
output to the level shifter circuit. The active-low counter clock enable (/CCKEN) is pulled low by a
100 Ohm resistor, and the active-low asynchronous counter clear (/CCLR) is tied to the Main
PCB’s hardware reset line. The /RCO output is fed to a level shifter circuit (Q801 and Q804).

The synchronization clock is fed to all three switching power supply regulators in the console. The
clock frequency will be either 98.1704 kHz or 101.7081 kHz, depending on the state of
SUPPLY_FREQ_SEL, driven by U1. U1 picks the state based on AM tuner frequency.

2.4 Power Fail Detection

Q802 and Q803 detect a power failure by asserting the active-low /POWER_FAIL signal when the
console input voltage V_RAW falls below a given threshold (equivalent to an AC line voltage of
about 75 VACRMS). This signal is fed to U1 as an interrupt so the micro can perform some shut­down functions before it is held in reset; see section 3.1.2 for additional information.

2.5 Grounding

R321 on the Tuner PCB connects PGND (the ground provided to the product by the power pack)
and GND (tuner signal ground). The power supply ground on the Main PCB is connected to GND
only at C832 and C828.

Additional signal ground connections between the Main and Tuner PCBs and between the PCBs
and the conductive paint on the plastics are made by conductive gasket material attached to the
plastic cover and base.

8

Theory of Operation

2.6 Troubleshooting

Verifying functionality of the power supply system by measuring the DC levels on each supply
(including the power pack) is sufficient for basic troubleshooting.

If power supply problems are suspected, or if DC levels on the supplies are incorrect, evaluate
and correct these parameters with no power applied:

• Check continuity between J104 and pin 8 of each supply.

• Measure the resistance of R321 on the Tuner PCB.

• Measure the resistance of feedback resistors (R304 and R305 in the +12V supply) in each supply.

• Verify that no supply voltage output is shorted to ground.

3.0 Control Electronics

The majority of the control electronics are located on the Main PCB, the notable exceptions being
the Infrared Blaster diodes and receiver module (located on an auxiliary PCB under the DVD-ROM
drive tray) and the RF transceiver circuitry (located on the Tuner PCB).

3.1 Processor

U1 is a CS98000 DVD decoder IC that also functions as the media center’s main processor.

U1 contains two built-in 32-bit RISC processors, a DSP core, a memory interface which supports
SDRAM and FLASH ROM, an ATAPI interface, a DMA controller, an MPEG video decoder, on­board data and instruction caches, a digital video interface, digital audio processing, a general
purpose interface, and numerous general-purpose I/O.

One RISC processor in U1 (RISC0) manages the ATAPI interface to the DVD-ROM drive, and
handles all low-level details associated with playback/navigation of DVD and CD discs. RISC0
sends standard ATAPI control commands to the drive and receives MPEG-compressed audio,
video, and control information back. It decodes the MPEG information from the DVD-ROM drive on
the ATAPI bus and stores the decoded video into SDRAM for later readout to the video interface. It
also oversees the onboard DSP core, as required, when decoding digital audio data, and sends it
out the digital audio interfaces.

®

The second RISC processor (RISC1) runs Bose
sembles VFD and On-Screen Display (OSD) information, and controls I/O functions including
reading the console buttons, receiving the RF and IR remote control commands, driving the OSD
and VFD display on the console, controlling the AM/FM tuner sub-circuit, and driving the IR blaster
controls.

Connections to U1 are made throughout SD254135.

software that handles system control, as-

9

Theory of Operation

3.1.1 Processor Clock

U1 is clocked by a crystal inverter-oscillator whose nominal frequency is 27 MHz.

A 10KW resistor (R713) biases one gate of U701, a 74VHCU04 [high-speed, unbuffered] inverter.
The crystal in the inverter’s feedback path is designed for a 22pF load, achieved by the series
combination of the two 30pF load capacitors C704 and C707 and other stray capacitance in the
input gates of U1. R714 sets the pole in the oscillator’s loop response, and R715 buffers the output
between the oscillator and U1. See sheet 8 of SD254135.

After the signal is buffered by U1, the 27 MHz clock drives the video circuitry. Frequency accuracy
within ±50ppm of this oscillator circuit is necessary for color video operation.

3.1.2 Processor Reset

U703 generates a 140ms reset pulse at power-on and any time the +3.3V supply dips below 2.93
volts (corresponding to an AC line voltage of about 40VACRMS. The pulse is buffered by two of
the gates of U701, a 74VHCU04 inverter, and distributed as active-low /RESET1. The reset signal
ensures reliable startup of U1 at power-up and after a brownout.

See the comments in section 2.4 regarding power-fail detection.

3.2 Memory

See sheet 1 of SD254135.

The U1 memory interface supports both SDRAM and flash memory of various sizes. Both memory
ICs are connected to the same bus, and a chip select chooses between the two devices. The type
of memory cycle that is run depends on which address space is needed.

3.2.1 FLASH

U2 is a 1-megaword by 16-bit Flash memory IC. FLASH memory is nonvolatile, meaning that its
stored data is not lost when the chip loses power. The FLASH is used to store all application
software for the product (including software to run on both of U1’s RISC processors and its DSP).
This software is programmed into the FLASH by Manufacturing during In-Circuit Test. The FLASH
also stores nonvolatile user parameters, such as AM/FM presets and OSD setup preferences.

U2 shares the memory address and data bus with U3, but its cycle is different from the SDRAM:
flash access is asynchronous and does not use a memory clock. Address (pins 1-9, 18-24, and

48) and chip select (pin 26) is presented to the chip, and data appears 1 access time later on the
data bus. The flash chip only supplies 16-bit data to U1; the other data bus lines are not driven
during flash access.

U2 can be programmed in-circuit by U1; this allows media center software updates in the field via
CD-ROM. During reprogramming, the new program is held in SDRAM (along with the operating
program) until checksum-verified, then written permanently to FLASH.

10

Theory of Operation

3.2.2 SDRAM

U3 is a 2-megaword by 32-bit synchronous dynamic random access memory (SDRAM) IC. When
the media center powers-up, the application program from the FLASH is shadowed into and ex­ecuted out of the SDRAM to improve speed. The SDRAM is also used to hold blocks of com­pressed and decompressed audio and video data, as well as numerous variables and flags, as
required by the software.

For SDRAM accesses, a memory clock of about 100 MHz that synchronizes data access is sent
to the chip at pin 68. Data commands for accesses are coded in the /RAS and /CAS signals (pins
18 and 19), and data read/write selection is done by the /WE signal (pin 17). The address to be
written or read is given on the address bus (pins 25-27 and 60-66). The 32-bit data bus contains
the word to be written or read after the pipeline delay of the memory chip. The detailed operation of
the SDRAM is outside the scope of this document.

3.3 Remote control

3.3.1 RF Transceiver

See sheet 2 of SD256131.

The AV28 media center RF transceiver operates at 27.145 MHz using on-off keying (OOK). The
RF transceiver circuits are located on the Tuner PCB. The antenna for the RF transceiver system
is the DC power cord attached to J104; a 10mH inductor in the power pack facilitates transmission
and reception over the zip cord. The RF signal is capacitively coupled to the V_RAW line by C214.

3.3.1.1 Receiver

The remote control receiver module is an AM receiver; it takes the RF signal from the antenna line,
demodulates it, and outputs the received data to the data slicer circuit. U104, an LM393 dual
comparator, acts as a data slicer and outputs TTL-level signals for the received data waveform.
The RF_DATA_RCV output line connects to U1 through J103.

3.3.1.2 Transmitter

The AV28 media center contains a transmitter for future bidirectional remote control operation.
Q202 and Y201 form a crystal oscillator that is powered when the XMIT/RCV_SEL line from U1 is
high. The output of the oscillator is fed to Q205, a Class-C RF amplifier. Data is sent on the trans­mitter by way of the RF_DATA_XMIT line from U1, which powers the amplifier. The amplifier’s
output is fed through a tank circuit and the filtering network.

3.3.1.3 Filtering network

Passive components on the V_RAW line provide filtering for the RF remote signal: L203, C218, and
C217 form a 27.145 MHz notch; L205, C219, and C216 form a 45.290 MHz (second harmonic of

27.145 MHz) notch. C222, C223, and C224 aid in limiting undesired radiated emissions. FB1 is a
ferrite bead designed to improve tuner performance by limiting radiated self-noise in the FM band.

11

Theory of Operation

3.3.1.4 RF Remote Control

The RF remote control contains a similar transmitter to the one described in section 3.3.1.2. The
remote’s DIP switch functions are as follows:

Switches 1-4: 4-bit House Code. All AV28 media centers are shipped set to respond to House
Code 0000 (switches 1-4 all down).

To change the House Code of an AV28 media center, do the following:

1. Turn it OFF using the ALL OFF button on the media center.

2. Press and hold the STORE button on the console.

3. While holding the STORE button, press any button on an RF remote set for the desired House

Code. When the AV28 receives this RF message, it will adopt the new House Code as its own.

Switches 5-6: 2-bit Zone Code. If switch 6 is up, the remote will control Zone 1. If switch 5 is up, the
remote will control Zone 2. If BOTH switches are up, the remote will control BOTH zones.

Switches 7-9: 3-bit Room Code. The AV28 is capable of controlling up to 7 speakers in each zone.
Each speaker has a 3-bit Room Code. Zone 1, Room A (000) is defined as the primary room (the
console buttons will also control this room), and is the Room Code set as a default on all LS28/35
bass module speakers shipped with the AV28. To control the media center’s variable analog out­puts, the RF remote control needs to be set for Room G (110).

3.3.2 Infrared Transceiver

The AV28 media center contains a built-in IR Blaster capable of sending control commands out the
black lens along the bottom front of the product to other manufacturers’ A/V equipment. Similarly,
an IR receiver is built-in which allows the media center to be controlled by any IR remote control
capable of sending Bose AV28 control commands.

3.3.2.1 Infrared Blaster IC

The IR Blaster IC (U704) is an 8-bit microcontroller located on the main board, sold by UEI elec­tronics. The IC is pre-programmed with an extensive set of IR control commands for a number of
other manufacturers’ devices. Devices able to be controlled are limited to TV’s, VCR’s, Cable Set­Top Boxes and Satellite Set-Top Boxes. Over one hundred manufacturers are represented, cover­ing the U.S./North American, European, South American and Asian markets. To enable sending IR
control commands, the user must select the desired Manufacturer and Device Codes from lists in
the OSD System Setup menus.

Additionally, the AV28 is capable of “teaching” an IR learning remote the commands required to
control the media center. When the user enables the Transmit IR function in the System Setup
OSD menu, the AV28 will automatically echo all received RF remote control messages out its IR
Blaster in Bose AV28 IR format. An IR learning remote can then be taught to control the AV28 by
holding it near the front of the media center as the user presses the desired RF buttons.

12

Theory of Operation

3.3.2.2 Infrared Blaster Diodes

Four diodes located on the IR PCB transmit infrared messages to external A/V equipment. U704
provides the modulated data for the diodes; Q703 and Q706 supply the +5V drive voltage, and
R729 and R730 on the Main PCB limit the IR transmit current (setting the transmit brightness).

3.3.2.3 IR Emitter

For situations where the position of the AV28 does not allow its built-in IR Blaster signals to prop­erly control an external product, a supplemental IR Emitter “dongle” can be plugged into the back of
the media center and pointed more directly at the equipment in question. This “dongle” is essentially
a combination cable and IR-transmitter diode, and plugs into the jack labeled “IR Emitter (J704).”
Q703/Q705 provide the +5V drive voltage for the dongle, and R739/R740 limit the drive current to
about 50mA.

3.3.2.4 Infrared Receiver Module

The IR PCB contains an infrared receiver module. This module allows the media center to be
controlled by any IR remote control capable of sending Bose® AV28 IR commands (NOTE: Re­ceive IR needs to be enabled via the System Setup menus in the OSD first, however). The Main
PCB supplies +5.1V to the module. The module performs light filtering functions, optical to electrical
conversion, demodulation about a 38-kHz carrier, and level shifting to provide TTL-level outputs to
U1. The plastic housing surrounding this area is translucent to infrared. Infrared control must be
enabled in the OSD to be functional.

3.3.2.5 Infrared Troubleshooting

During the Power-On Self-Test (POST) phase, the console attempts a query of the IR Blaster IC
and an infrared loopback test; TAP query and the console keypad provide access to test results.

If the IR Blaster IC query fails, concentrate troubleshooting efforts on U704 on the Main PCB.

Symptoms of successful queries to the IR Blaster IC and failed loopback tests require trouble­shooting of the IR PCB. First, verify cable placement and integrity. Verify basic receiver module
functionality by injecting an infrared signal (for example, a Bose Wave Radio remote) and measur­ing pin 3 of J1000 on an oscilloscope. To test basic transmitter functionality, verify diode conduction
and orientation, then issue TAP commands to control a Bose Wave Radio.

Troubleshooting customer complaints regarding control integration exceeds the scope of this
document.

13

Theory of Operation

3.3.2.6 IR Key Codes

The following table describes the key codes capable of being generated by the built-in UEI Blaster
chip:

TV CBL SAT VCR

Key

Code

1 Power / Standby Power,

2 Digit 1 Digit 1 Digit 1 Digit 1 Digit 1

3 Digit 2 Digit 2 Digit 2 Digit 2 Digit 2

4 Digit 3 Digit 3 Digit 3 Digit 3 Digit 3

5 Digit 4 Digit 4 Digit 4 Digit 4 Digit 4
6 Digit 5 Digit 5 Digit 5 Digit 5 Digit 5

7 Digit 6 Digit 6 Digit 6 Digit 6 Digit 6

8 Digit 7 Digit 7 Digit 7 Digit 7 Digit 7

9 Digit 8 Digit 8 Digit 8 Digit 8 Digit 8

10 Digit 9 Digit 9 Digit 9 Digit 9 Digit 9

11 Digit 0 Digit 0 Digit 0 Digit 0 Digit 0
12 Enter Channel Enter Channel Enter Channel Enter Channel Enter

13 -/-- , / 10+ -/--, 10+ -/--, 10+ -/--, 10+ -/--, 10+

14 Previous

15 20+ 20+ 20+ 20+ 20+
16 Channel Up /

17 Channel Down /

18 TV/VIDEO TV/VIDEO A/B TV/DSS,

19 Input---- ---- ---- Input Select

20 Play

21 Stop
22 Fast Forward

23 Rew

24 Pause

25 Guide Guide Guide Guide ----

26 ExitE xit Exit Exit ----

27 SelectS elect Select Select ----

28 Up Up Up Up ----

29 Down Down Down Down ---­30 LeftL eft Left Left ----

31 RightRi ght Right Right ----

32 Record ----- ----- ----- Record

Function Name

#

Channel

Program Up

Program Down

Standby

Previous
Channel

Channel Up Channel Up Channel Up Channel Up

Channel Down Channel Down Channel Down Channel Down

TCS V

Power,
Standby

Previous
Channel

---- ---- ----

---- ---- ----

---- ---- ----

---- ---- ----

---- ---- ----

Power,
Standby

Previous
Channel

TV/SAT

Power,
Standby

Previous
Channel

TV/VCR

Play

Stop
(Search)

Forward
(Search)
Reverse
Pause

Note: No IR sent.

14

Theory of Operation

4.0 Audio Electronics

The AV28 is a 2-Zone audio system, meaning that users can simultaneously listen to one audio
source in one room and a second audio source in another. Therefore, much of the audio path
hardware is split into two sections: Zone 1 hardware and Zone 2 hardware.

Furthermore, the media center outputs each zone’s audio content in two different forms: analog
and digital. The analog outputs are standard left/right, 2Vrms (max) signals similar to those found
on past Bose
series with them. Other analog outputs are fixed level, and remain at the 2Vrms (max) level, re­gardless of the user’s volume setting. Examples of variable outputs would be the headphone
outputs and the analog left/right signals on the Speaker Output mini-DIN connectors. The only fixed
analog outputs are the Record Out left and right signals. See the diagrams, below.

The digital outputs are serial digital audio data streams in S/PDIF format. These output streams
contain the same audio source material as their analog counterparts in each Zone, but the left/right
information has been digitized and combined into a single datastream. The S/PDIF outputs, how­ever, may send either 2-channel (PCM) audio, or bursts of compressed multichannel audio (in AC­3, AAC, MPEG-2, MP-3, or DTS formats). The amplitude information within the S/PDIF streams
never varies with volume level; instead, speakers receiving the streams will perform the volume
control function.

®

products. Some of these outputs are variable level, with volume control cells in

There are both analog and digital options for all AV28 audio inputs, as well. A simplified diagram of
the audio path would therefore be:

Zone 1

Record Output

(Fixed)

Internal Analog

Audio Sources

(Tuner, DVD 2-Channel

Mixdown)

External Analog

Audio Sources

(TV, VCR, AUX, Tape)

DVD-ROM

Playback

(DVD, CD)

External Digital

Audio Sources

(TV, VCR, AUX, Tape)

U201

TEA6422

ANALOG MUX

(Selects the desired

analog input

for each Zone)

U501

CS8415

S/PDIF MUX

(Selects the

desired

S/PDIF input)

ATAPI

PORT

U1

CS98K

DVD

DECODER

U303

CS4224

Z1 Codec w/

Volume Control

U403

CS4224

Z2 Codec w/

Volume Control

U306

CS8405

Z1 S/PDIF

XMTR

U406

CS8405

Z2 S/PDIF

XMTR

Zone 1

Speaker Output

(Variable)

Zone 1

Headphone Output

Zone 2

Speaker Output

(Variable)

Zone 1 Digital
S/PDIF Output

Record Digital

S/PDIF Output

Zone 2 Digital
S/PDIF Output

15

Theory of Operation

Analog audio sources to be played in Zone 1 or Zone 2 are selected by U201, the TEA6422 analog
MUX IC. The chip has separate left/right output pairs for each zone, and is controlled by U1 via the
serial I2C interface. Its outputs are fed into the Zone1/Zone2 audio codecs (U303 and U304).

The codecs first digitize the analog signals using onboard 24-bit A/D (analog to digital) converters.
The digitized result (in I2S format) is then simultaneously fed out to the Zone1/Zone2 S/PDIF
transmitters (U306/U406) and back into the codecs. Once back in the codecs, signals are con­verted back to analog via 24-bit DAC’s (digital to analog converters), passed through onboard
volume control cells, then outputted once again as left/right signal pairs. U305 and U405 form
differential amplifiers that increase the codec audio outputs to a full-scale level of 2Vrms, and filter­out unwanted high-frequency digital noise. The resulting analog signals feed the headphone out­puts as well as the Zone 1 and Zone 2 speaker outputs. Volume control levels are set by U1 via
the I2C interface. Zone 1 signals pass through a set of mute transistors, Q300 through Q304,
which quiet the Zone 1 speaker outputs when the headphones are plugged-in.

The same I2S signals which feed the Zone 1 S/PDIF transmitter (U306) also feed U202, a CS4340
DAC. This DAC creates the fixed-level analog signals sent out the analog left/right Record Outputs.

A set of logic gates, U302, U304, U402 and U404 (74LCX157 Quad 2-Input Digital MUX chips) are
used to route I2S signals (consisting of a Data line, Master Clock, L/R Frame Clock and Bit Clock)
between the codecs and the S/PDIF transmitter chips. These digital MUX chips are controlled by
U1 using a set of individual logic lines (where a +3.3V level selects the “B” inputs, and a 0V level
selects the “A” inputs). These logic lines have various schematic names, and are connected to the
SELECT pin of each 74LCX157. These same chips route the digital audio signals from U1 (also in
I2S format), discussed next.

Digital audio input streams are selected by U501, the S/PDIF MUX chip, before being funneled into
U1, the CS98K DVD Decoder IC. In this way, the CS98K’s onboard DSP can decode the desired
stream if it happens to be in a compressed audio format (AAC, AC-3, MPEG-2, MP3, DTS or
MLP). U501 selects the desired stream based on I2C commands from U1.

Streams played from discs in the DVD-ROM drive are clocked out of the CS98K at a sample rate
equal to the rate at which they were recorded. CD audio (CD-DA) discs all require a 44.1kHz
sample rate. Audio from DVD video discs typically requires a 48kHz sample rate, but may use
other rates. External streams received through the S/PDIF MUX will need to be clocked out of the
CS98K at a sample rate synchronous to the clock encoded into the stream (may be many different
rates). The CS98K’s AC-97 port is hard-wired to an external 44.1kHz clock. Therefore, streams
clocked out of this port only support a 44.1kHz sample rate. The CS98K’s PCM output ports share
a single clock rate which can be set by U1 to any desired frequency (AUD-DO_0, AUD-DO_1,
AUD_DO_2 and AUD_DO_3, sheet 8 of the schematics, are the data lines).

16

Theory of Operation

The AV28 Signal Routing and Clocking Diagram, which follows, shows the fully-detailed audio
path, including clocking information. The legend at the bottom identifies which signals are analog,
which are digital, and what the relevant clock rates/sources are.

ANALOG

L/R

SOURCES

TV EXT

VCR EXT

AUX EXT

TAPE EXT

TUNER

DVD MIXDOWN

AV28 AUDIO PATH:

Signal Routing and Clocking

U201

TEA6422

ANALOG

MUX

1

1

2

3

2

4

5

3

6

U503

CS4340

DAC

D/A

A/D

A/D

CS4224
CODEC

U302

74HC157

MUX

CS4224
CODEC

U303

U403

D/A

D/A

VOLUME

CELL

U304

74HC157

MUX

VOLUME

CELL

U205

NJM4556

BUFFER

U202

CS4340

DAC

CS8405

S/PDIF
XMTR

D/A

U306

ANALOG

HEADPHONE

OUTPUT

ZONE 1

ANALOG

L/R

VARIABLE

OUTPUT

ANALOG

L/R
RECORD
OUTPUT

ZONE 1

S/PDIF
DIGITAL
OUTPUT

ZONE 2
ANALOG

L/R

VARIABLE

OUTPUT

Port must always
run at 44.1kHz
sample rate
(clocked by U303).

DVD ROM

J501

OPTICAL

S/PDIF

RCVR

ATAPI

XFACE

S/PDIF

SOURCES

U502

74HC157

MUX

AC-97 PORT

(CONFIGURED AS I2S)

U1

CS98K

(LS500C)

DVD

DECODER

Port supports many sample
rates (but D0-D3 andIN
always share the same rate).

ZONE 1 OUT

ZONE 2 OUT

AUX EXT

OPTICAL EXT

TAPE EXT

VCR EXT

TV EXT

I2S

AUDIO

PORT

U402

74HC157

MUX

U404

U1

D0
D1
D2
D3
IN

U501

0

CS8415

S/PDIF

1

MUX

AND

2

RCVR

3

OUT

4

5

6

74HC157

MUX

U505

74HC157

MUX

ANALOG L/R

2

I

S: U303 PROVIDES CLOCK (ALWAYS 44.1 kSPS)

2

I

S: U1 OR U501 PROVIDES CLOCK (SOURCE DEPENDENT)

2

S: U303, U1 OR U501 PROVIDES CLOCK

I
S/PDIF: UP TO 96 kSPS

U406

CS8405
S/PDIF

XMTR

J701

OPTICAL

S/PDIF

DRIVER

ZONE 2

S/PDIF
DIGITAL
OUTPUT

S/PDIF
RECORD
OUTPUT

OPTICAL

S/PDIF

RECORD
OUTPUT

17

Theory of Operation

Although the AV28 is a 2-zone audio system, as discussed, the clocking limitations of the hard­ware occasionally restrict which forms of audio can be simultaneously played out the two zones at
a given time. In these situations, Zone 1 (assumed to be the primary zone) would be allowed to
play the digital source while Zone 2 would be downgraded to playing an analog input source. For
example, a user could not play a DVD video disc in Zone 1 and simultaneously listen to the exter­nal AUX digital input source in Zone 2, since the CS98K’s PCM output port can only clock out a
single digital stream at a time. The system, in this case, would use the CS98K to decode the DVD
video disc’s audio for Zone 1, and would select the external AUX analog inputs to play in Zone 2.

The following tables describe the resulting audio formats when playing each combination of
sources simultaneously in the two zones:

TYPE OF AUDIO INPUT ALLOWED TO PLAY OUT EACH ZONE

(Zone 1 result shown on top in bold, Zone2 result shown on bottom in italic)

Source Selected for Zone 1

Off AM FM Tape AUX VCR TV DVD MP3CD CD

Off

Analog

Off

AM

FM

Tape

AUX

VCR

TV

Source Selected for Zone 2

DVD

MP3CD

CD

Key: Zone 1 performance has

been downgraded to

Off

Off

Analog

Analog

Off

Analog

Off

Analog

Off

Analog

Off

Analog

Off

Analog

Off

Digital

Off

Digital

Off

Digital

support Zone 2.

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Digital

Analog

Digital

Analog

Digital

Off

Analog

Off

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Analog

Digital

Analog

Digital

Analog

Digital

Zone 2 performance has

Digital

Off

Digital

Analog

Digital

Analog

Digital

Digital

Digital

Analog

Digital

Analog

Digital

Analog

Analog

Digital

Analog

Digital

Analog

Digital

been downgraded to

support Zone 1.

Digital

Off

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Digital

Digital

Analog

Digital

Analog

Analog

Digital

Analog

Digital

Analog

Digital

Digital

Off

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Digital

Digital

Analog

Analog

Digital

Analog

Digital

Analog

Digital

Not allowed because the tuner cannot play

AM and FM simultaneously, or because
only one disc can be in the tray at once.

Digital

Off

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Digital

Digital

Analog

Analog

Digital

Analog

Digital

Digital

Off

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Digital

Digital

Off

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Digital

Digital

Off

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Analog

Digital

Digital

As shown, for consistency, Zone 2 speaker outputs generally only plays the analog external inputs
(AUX, TAPE, VCR and TV). The exception here is when both Zone1 and Zone2 are listening to the
same external input; in this case, both zones will play the external digital inputs (if present), to
ensure that audio-path delays are identical for each zone.

When an external input source (AUX, TAPE, VCR or TV) is chosen for Zone1, the AV28 automati­cally checks for the presence of a digital input stream and plays it if it exists. If it doesn’t, the AV28
will default to playing the analog inputs.

18

Theory of Operation

A hardware issue was found with the CS4224 codecs whereby audio passing through its A/D
converter emerges with left/right sample pairs mismatched; specifically, with left samples lagging
right samples by one sample clock. In other words, left/right sample pairs coming out of the ADC
together were not sampled together (right was sampled before left). The codec’s DAC section has
the reverse problem: left samples will emerge ahead of the associated right samples. The net result
of this hardware bug is that audio passed fully through the codec (from ADC input to DAC output)
will have no improper left/right delays. However, audio passed only partially through the codec
(only the ADC section, for example) will have left/right pairs emerge slightly out of phase. This
slight phase difference will have no noticeable effect when played through conventional stereo
speakers; however, slight spatial anomalies might be noticed if played through a surround-sound
system.

CS4224 Hardware Bug: Effect on Postman Console Audio Outputs

Source Playing Zone 1

S/PDIF

Network

Output
(Used for
Cobalt II)

Internal DVD Disc

Internal CD-DA

Internal MP3 Disc

Internal AM/FM

External S/PDIF

Sources

External Analog

Sources

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Right

Leads Left

Left/Right

O.K.

Right

Leads Left

Zone 1

Variable

Analog
Output

(Used for

Cobalt I)

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Analog
Record
Output

Right

Leads Left

Right

Leads Left

Right

Leads Left

Right

Leads Left

Right

Leads Left

Right

Leads Left

S/PDIF

Record

Output

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Right

Leads Left

Left/Right

O.K.

Right

Leads Left

Headphone

Output

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Zone 2
S/PDIF

Network

Output
(Used for
Cobalt II)

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Right

Leads Left

Left/Right

O.K.

Right

Leads Left

Zone 2

Variable

Analog
Output

(Used for

Cobalt I)

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

Left/Right

O.K.

When playing-back an audio stream which was recorded using pre-emphasis (common in earlier
CD’s, for example), the media center’s analog Record Outputs will not properly apply de-emphasis,
as follows. The resulting audio will have more treble than desired:

Playing-Back Pre-Emphasized Audio Streams

Source Playing Zone 1

S/PDIF

Network

Output
(Used for
Cobalt II)

Internal CD-DA

O.K. O.K.

Zone 1

Variable

Analog

Output

(Used for

Cobalt I)

Analog

Record

Output

De-

S/PDIF

Record

Output

Headpho

ne

Output

Zone 2
S/PDIF

Network

Output

(Used for

Cobalt II)

Zone 2

Variable

Analog
Output

(Used for

Cobalt I)

O.K. O.K. O.K. O.K.
Emphasis
is Missing

External S/PDIF

Sources

O.K. O.K.

De-

Emphasis

O.K. O.K. O.K. O.K.

is Missing

19

Theory of Operation

5.0 Video Electronics

U603, U604

U1

CS98000

Digital Analog

CS4988

Video

Encoder

U601

External

Video

Video Block Diagram

Video signals may be generated internally (by U1) or passed-through from a set of external
(VIDEO INPUT) connectors. Internally generated signals include DVD playback and On Screen
Display (OSD) signals. OSD menus are accessed by pressing the SETTINGS button on the RF
remote. When not playing back a DVD or generating an OSD, the media center defaults to passing­through external video signals, much as a VCR does. The media center is capable of being con­nected to either NTSC or PAL televisions, where the desired format is selected via the OSD:

NJM2284

Video

Switch

U602

Amp

NJM2267

Video

Output

NTSC (National Television Standards Committee (USA) or National Television Systems
Committee). A television standard with 60 fields per second, 30 frames per second, and 525 lines

per frame. Variations of the standard include NTSC-M. A size used to digitize NTSC is 640x480
pixels. This standard is used in America and parts of Japan.

PAL (Phase Alternation Line). A television standard with 50 fields per second, 25 frames per
second, and 625 lines per frame. Variations of the standard include PAL-B/G. A size used to digi­tize PAL is 768x576 pixels. This standard is used in parts of Africa, Australia, parts of Europe, and
in the U.K.

The video interface drives several kinds of video digital to analog converters to generate the
analog video monitor drive signals. U1 generates a standard ITU R.BT656 digital video data
stream with embedded synchronization. This standard uses an 8 bit bus, with interleaved Y, Cr, Cb
data. Synchronization information is embedded in the data stream, and exclusively uses values of
00 and FF (hex). Y values are from 1 to 254, with 1 being black. C values are from 1 to 254, with
128 being no chroma. The standard document should be consulted for further details on this bus.

The video encoder (essentially a video digital to analog converter), U601 on sheet 6 of the sche­matic, is a 44 pin quad flat pack, containing extensive video processing circuitry. The data sheet
for this part (number CS4955) shows the block diagram and signal processing circuitry inside the
chip. The chip has many programmable registers inside, to set different operation modes, etc.
These registers are set by the main processor over a serial I

2

C bus (pins 32 and 33).

The CS4955 receives the ITU R.BT656 data bus, decodes the synchronization and separates the
Y, Cr, and Cb values into separate data streams. The three channels of video data are processed
appropriately, and sent to the digital to analog converters. Composite video is generated at pin 44,
S-video Y and C are generated at pins 48 and 47, and RGB or YCrCb are generated at pins 39,40,
and 43. The Composite video and S video are paralleled on the circuit board with the RGB (or
YCrCb) signals. The appropriate DACs are enabled by internal control circuitry, commanded by the
main processor, depending on the mode selected by the user. This allows either Composite and S­video, or Component video, to be placed on the output jacks of the AV28 console.

20

Theory of Operation

The 3 video signals are sent to the internal/external video MUX, U602, a NJM2285 chip. This chip
will select either the internal or external set of video signals to be sent on further through the video
chain. The selection is made by the control pins 2, 7, and 12, driven by transistor Q601, a level
shifter driven by the main processor. No matter which mode the user selects, Composite and S­Video, or Component video, the same circuitry is used in the video chain.

After internal/external selection, the three video signals are sent to the output video drivers, U603
and U604. These are NJM2267 chips, with dual video channel capability. Each channel contains a
clamp circuit on the input, which does a DC restore on the video signal by clamping the negative
sync tip of the video signal to a DC voltage. The output driver drives the video signal through a
330uF capacitor (100-220uF on early units), and a 75-ohm resistor. This ensures equipment
compatibility even if there are DC differences between the AV28 and the driven equipment. The 75­ohm resistor provides reverse cable termination for best signal integrity. Video sent through a
330uF capacitor would have low frequency drop-off, causing sag in the video signal. This is cor­rected by the sag compensation pins of the NJM2267s, by sampling the video signal past the
capacitors, and correcting of any sag that occurs. This prevents synchronization problems with
video monitors that may otherwise occur.

For the Cr and Cb signal in component mode, and the C signal of the S-video signal, there is no
synchronization pulse for the input clamp of the 2267s to clamp to, which could distort the negative
tips of these chrominance signals. For these signals, the transistors Q601 and Q602 are turned on
by the port pins of U601, supplying enough DC voltage to the signal to raise them above the clamp
level, preventing any clamping action on them.

The CS4955 must receive a 27 MHz signal from the clock oscillator, with an accuracy of +- 1350­hertz. This frequency is phase lock-looped inside the CS4955 to generate the 3.579545 MHz color
subcarrier for the composite video signal, and must be of high accuracy so that television monitors
can lock onto it and be able to decode color information to display.

6.0 Tuner Electronics

6.1 FM Tuner

The FM RF signal is provided by the F connector, J102, and goes to the FM front-end module. The
antenna supplied with the media center is the standard Bose® FM dipole antenna. Contained within
the FM front-end is a tuned RF amplifier, FM local oscillator and mixer. The 10.7 MHz IF output
signal (pin 7 of the module) passes through a 10.7 MHz ceramic filter, CF101, to a FM IF amplifier,
and then back through a second ceramic filter, CF102. Transistor Q301 and related circuitry form
the FM IF amplifier that produces about 15 dB of voltage gain and provides the proper impedance
matching for ceramic filters CF101 and CF102. These FM IF filter stages reject unwanted FM
stations and noise.

The output signal from CF102 is fed to the LA1837 AM/FM detector IC, U101. This device contains
the FM IF limiter, FM detector, FM stereo MPX decoder, S-meter circuitry which is used for seek
processing, and most of the AM circuitry. The FM IF input signal to the LA1837 goes through
several gain/limiter stages and then to a single-tuned, coil-based discriminator circuit. The discrimi­nator coil, T103, is adjusted for minimum second harmonic audio distortion. The recovered FM
composite signal appears on pin 23 of U101.

21

Theory of Operation

The composite audio signal is filtered by C124 and fed back into the LA1837 on pin 22. The value
of C124 affects FM stereo separation performance. Stereo MPX decoding is also performed by
U101 and the decoded left and right output signals are produced on pins 16 and 17. The pilot PLL
VCO is completely internal to the LA1837 detector IC, not requiring an external 456 kHz ceramic
resonator as in the older LA1836 and LA1851-based designs. The pilot PLL loop filter is formed by
C120, R118, and C122 on pin 14.

Capacitors C132 and C133 and the internal resistance of the LA1837 set the FM de-emphasis. For
a US unit the capacitor values are set to produce 75-uSec de-emphasis, and for Europe/Japan
they are set to produce 50-uSec de-emphasis. MPX filters, T104 and T105, reject the residual 19
kHz pilot tone and 38 kHz sub-channel demodulation components.

The FM and AM S-meter signals, which are at pin 11 and 12 of the LA1837 respectively, are
analog voltage levels that are proportional to the FM IF/AM RF input signal levels. These signals
are used to control the FM stop level, FM force-mono level, and AM stop level. The nominal FM
stop/force-mono levels are:

Parameter Frequency Level

FM Seek Stop 98.1 MHz 30 dBf
FM Force Mono 98.1 MHz 40 dBf

Both S-meter signals are connected to a 2-input 6-bit analog to digital converter that resides in the
LC72144 PLL IC, U103. During factory final test booth tuner alignment the appropriate test signal
levels are injected into the UUT and the resultant ADC values for stop and force-mono levels are
stored in the Flash memory of the main board. Level scaling is applied to both the AM and FM S­meter signals so that these signals do not saturate the dynamic range of the 3.3 V full scale A/D
converter.

6.2 AM Tuner

The signal from the external AM loop antenna enters through the 2.5 mm AM jack, J300, and is fed
to the AM front end module, T101. This module contains the varactor-tuned RF and Local Oscillator
(LO) tracking circuit. This part is pre-tuned by the manufacturer for proper alignment in this circuit
with AM antenna, and is further adjusted during factory alignment, if necessary. The RF tuned
output appears on pin 12 and is fed to the AM buffer FET transistor Q103. This buffered output is
sent to pin 27 of U101 which contains the AM RF amplifier, mixer, IF amplifier, AM detector, and
AM S-meter circuitry. The 450 kHz AM IF output signal that appears on pin 2 is filtered by the IF
filter, T102, and fed back into the IC on pin 4. The AM IF signal is demodulated by the LA1837 and
the audio output is sent to pins 16 and 17, which are the left and right outputs.

The AM seek stop processing and factory alignment is performed in a similar fashion to FM mode
processing. The S-meter voltage that corresponds to the desired AM stop level is stored during
factory final booth tuner alignment in the main board Flash memory.

The nominal AM stop level is 56 dBuV/m at 1080 kHz.

22

Theory of Operation

6.3 Phase-locked Loop Tuning

The AM and FM local oscillators are controlled by the LC72144 PLL IC, U103. Control from the
main board selects the AM or FM band and the particular frequency. The 7.2 MHz crystal, Y102, is
connected across an inverting amplifier inside U103 to form an accurate and stable crystal oscilla­tor. The 7.2 MHz oscillator is divided down to produce a 12.5 kHz reference frequency in FM mode
and 10 kHz reference frequency in AM mode. U103 divides down the AM or FM LO and compares
it to the appropriate reference frequency, generating an error signal on pin 21. This error signal is
integrated by Q208, Q207 and associated components, producing the tuning voltage at the collec­tor of Q207. C150, C146, R146, and R217 control the gain and pole-zero locations of this active
lead-lag filter

The AM tuning voltage is further filtered by R108 and C106 and is fed to pin 14 of the AM front end,
T101. The tuning voltage varies the capacitance of the varactor diodes, which in turn tunes the AM
antenna and the AM LO. Similarly, in FM mode, the tuning voltage is filtered by R148 and C151 and
fed to the FM front end. As in the AM case, the tuning voltage is fed to varactors which tune the LO
frequency and RF filtering.

Both the PLL IC and the LC72722 PLL IC are controlled via a CCB bus interface. This is a bidirec­tional interface that sends control information, such as band select and frequency control, to the
PLL from the main board. This bus also sends status information, such as digitized S-meter value
and FM mono/stereo status, from the PLL to the main board controller

6.4 RDS Operation

This feature is only implemented in the European version of the AV28 media center.

The LC72722 Radio Data System (RDS) decoder IC, U102, is a single-chip system IC that imple­ments the signal processing required by both the European RDS standard and US RDBS system.
RDS/RDBS systems can send digital information over the airwaves along with the standard FM
signal by adding a digitally modulated 57 kHz subcarrier to the normal FM composite signal. The
LC72722 includes a bandpass filter, demodulator, synchronization, and error correction circuits.
The input (pin 2) to the RDS IC comes from Q104, which buffers the FM composite signal at pin 23
of the LA1837. The timebase for the decoder is a crystal oscillator formed by the 4.332 MHz
crystal, Y101, the inverter internal to the IC across pins 12 and 13, and the two shunt capacitors,
C138 and C139. Control of the RDS IC is achieved by using the same CCB bus interface used for
the PLL IC.

6.5 Tuner Software

Software that controls the AM and FM tuner resides on the Main PCB.

The software that controls the FM tuner has provisions for an IF offset to optimize tuner perfor­mance for a given range of IF filters. The possible values of IF offset are -25kHz, 0, and +25kHz.
The software measures (“counts”) the IF frequency, and this offset is added to the count. In the
final console test, the value that minimizes THD at 98.1 MHz for an un-modulated 50dBF signal is
chosen and stored before other stop levels are set.

It should be noted that the stop levels for the tuner are also stored on the main board; the implica­tion of this is that every time a different tuner board is mated with a main board, the stop levels
must be reset due to board-to-board component variations.

23

Theory of Operation

7.0 Additional Electronics in the Console

7.1 Vacuum Fluorescent Display

A VFD module is installed in the front of the console. The module contains a microcontroller with
masked font tables, as well as built-in switching power supply/inverter and driver IC’s for control­ling the VFD glass. Communication to the VFD is serial through J103; see sheet 2 of SD254135.
The protocol requires both clock (VFD_CLOCK) and data (VFD-DATA) lines, is single-direction
only, and runs at about 4800 baud. Q101 and Q106 are used to power-down the higher-current
sections of the VFD after the console has been off for about 10 seconds (reducing power con­sumption and ensuring that the VFD is held in a reset state when the console is off).

7.2 DVD-ROM Drive

The DVD-ROM drive is a Toshiba SD-M1502 (soon to change to a SD-M1612). The drive is ca­pable of playing DVD-video discs (including CSS decoding), CD-ROMs, and audio CDs. An ATAPI
cable for data and separate power cable connect the drive to the Main PCB (see sheet 2 of
SD254135). Q103 is used to reset the drive’s built-in microcontroller upon console power-up. The
drive remains active (in a paused state) for about 5 minutes after playing a CD/DVD to allow a
customer to return resume playback from the same location on the disc; after that, the drive is put
into a low-current standby mode via software command.

7.3 Console Keypad

A nine-button keypad is located next to the DVD-ROM drive tray. Six signals connect U1 to the
keypad: three signals represent the keypad rows, and three signals represent the keypad col­umns. U1 identifies button presses by sequentially driving the KEYOUT lines (which activate
individual rows of keys) and reading-back the KEYIN lines (which have 75K pullup resistors inside
U1). If a button is pressed, the KEYIN line connected to that column of keys will be high (3.3V).
See SD256140.

Console Button Row Column

ON/OFF Top (driven by KEYOUT2, J102-3) Left (read by KEYIN2, J101-6)
SOURCE Top (driven by KEYOUT2, J102-3) Center (read by KEYIN1, J101-5)
VOLUME UP Top (driven by KEYOUT2, J102-3) Right (read by KEYIN0, J101-4)
ALL OFF Center (driven by KEYOUT1, J101-2) Left (read by KEYIN2, J101-6)
ENTER Center (driven by KEYOUT1, J101-2) Center (read by KEYIN1, J101-5)
VOLUME DOWN Center (driven by KEYOUT1, J101-2) Right (read by KEYIN0, J101-4)
OPEN/CLOSE Bottom (driven by KEYOUT0, J101-1) Left (read by KEYIN2, J101-6)
ERASE Bottom (driven by KEYOUT0, J101-1) Center (read by KEYIN1, J101-5)
STORE Bottom (driven by KEYOUT0, J101-1) Right (read by KEYIN0, J101-4)

7.4 Headphone Driver

The Headphone PCB holds the headphone jack itself, J200, and two inductors used to reduce
emissions and limit incoming ESD transients (L2001 and L2001). Pin 6 of the headphone jack is
used to sense when headphones are plugged in: when a customer inserts a headphone plug into
J200, pin 6 becomes shorted to ground. This pulls the HP-SENS line (normally pulled high by
resistor R242 on the Main PCB) to ground, alerting U1. U1 then mutes the appropriate audio
outputs. The headphone audio drive amplifier, U205, resides on the Main Board. This amp is config­ured as a voltage follower (providing no signal gain).

24

Theory of Operation

7.5 TV Power Detector

The infrared power command for televisions toggles the power state of the television; in order to
automatically turn a customer’s television on when a video source is selected, the power state of
the TV must be known to determine if sending a power toggle command is necessary. The circuit
detects the presence of the television’s horizontal sweep frequency; standard NTSC and PAL
monitors use 15750 Hz, and line-doubled, HDTV, or 480p monitors use 31500 Hz.

An external dongle plugs into the tuner board at J105; the dongle contains 25 turns of wire inside a
plastic enclosure. When placed properly (at the back of the unit near the deflection coils) on the
television, the dongle will output 20~200 mV of signal.

The TV power detector circuit is on the tuner board. See sheet 3 of SD256131.

The power detection circuit is built around U303, an NJM3403 quad op-amp IC. C328 and L302
form a highly peaked low-pass filter about 15750 Hz; C324, C325, and L303 form a similar filter
about 31500 Hz. The filters boost the voltage of their passbands about 10 times. The outputs of
these filters are fed to active band-pass filters constructed of sections of U303; the active filters
have a Q of 5 (allowing for component variation) and a gain of 20. The outputs of these active
band-pass filters (if present) are rectified and summed by D302. D303 performs a voltage shift
equal to that of the rectifier so that a reference voltage for the comparator can be generated with
diode drop compensation.

The remainder of U303 serves as a comparator and a Schmidt trigger. The comparator compares
the rectified signal with 0.5V; if either sweep frequency present, the comparator output will go high.
The Schmidt trigger section, designed to minimize chatter at the circuit output, drives the TV_ON
signal to U1 to indicate the detected power state of a television.

25

8.0 LS28/35 Bass Module Issues

Theory of Operation

The LS28/35 bass module is sold as a system with the AV28 media center and is mentioned for
reference. Refer to the Lifestyle

®

28 and 35 Digital Acoustimass® Powered Speakers service

manual part number 264562.

8.1 LEDs

The amber and green LEDs on the DSP board serve to provide information about the status and
operation of the speaker’s DSP board. The following is a summary of the various possible states of
the LEDs and a functional description of the state(s) represented.

• Green LED: The green LED serves a dual purpose: general system health and serial data

received. The green LED will blink once per second with a 50% duty cycle (i.e. on for ½ second,
off for ½ second) if the system booted and is running normally. If the unit is in the SmartSpeaker
“Off” condition, the green LED will blink briefly (approx. 0.1s ON time) once every 5 seconds.

• The green LED will also toggle whenever a serial data byte is received. This will interrupt the

normal 1-second blink rate. The green LED blinking faster than 1 Hz usually indicates that it is
receiving serial communications.

• Amber LED: The amber LED serves to signal 3 conditions: power applied/boot status, S/

PDIF status and clipping status. When power is first applied the amber LED will light briefly. If the
PROM FLASH checksum is incorrect or hardware does not pass power-on self test, the green
LED and amber LED will alternately blink at approx. a 5 Hz rate. If the green LED is blinking at its
normal, 1 Hz rate, a blinking, 1Hz amber light indicates that there is no valid S/PDIF signal present:
If the amber LED is off while the green LED is blinking normally, then valid S/PDIF is present and
being received. Finally, the amber LED will briefly blink (in this case, only when valid S/PDIF is
present) when the satellite amps are clipping. This should only occur when playing the system at
extremely high levels.

8.2 DIP Switches

The LS28/35 bass module has a set of four DIP switches, accessible from the back connector
area. Three of these switches (switches 1, 2 and 3) set the Room Code of the speaker, and must
match the three Room Code DIP switches on the remote control (switches 7, 8 and 9) used with
that speaker. Switch 4 on the speaker is only used in manufacturing/test to enter TAP mode, and
should nominally be left DOWN.

9.0 Legacy Speaker Issues

9.1 Protocol Setup

®

The AV28 media center supports legacy (existing) Bose

powered speaker systems in both Zone
1 and Zone 2. However, these systems (AM25P/30P II digital bass module and LSA) require the
console to send control commands using the older CD-5 Serial Data Port Protocol, which is NOT
the default smart speaker protocol used by AV28 media center. To enable this older protocol, the
user must use the OSD (Settings/Setup) menus to change either the Zone 1 Speaker Protocol or
Zone 2 Speaker Protocol from “Normal” to “Legacy” mode.

26

Theory of Operation

9.2 Addressing

The older CD-5 smart speaker protocol allowed addressing up to four speakers (“rooms”) per
zone, referred-to as Speakers A, B, C and D. Similarly, older Bose® Lifestyle® remote controls had
four DIP switches used for selecting which of these speakers should be controlled. All AM25P/30P
II digital bass module powered speakers are hard-wired as smart speaker address A. All LSA’s
are hard-wired as address B.

The AV28 media center's RF remote has three Room Code DIP switches (not implemented at
printing of this manual), allowing up to seven speakers per zone to be addressed, referred-to as
Rooms A through G. Since this addressing scheme is different than that used by older systems, a
translation table is required to understand how to use AV28 media center’s RF remote when

controlling AM25P/30P II digital bass module or LSA (when a zone is set for legacy mode), as

follows:

Postman RF Remote Room Switches for Legacy Mode

Postman Remote's Room

DIP Switch Pattern

(switches 7,8&9)

000 (Room A) 0x31 Cobalt I #1
001 (Room B) 0x35 Cobalt I #2

*010 (Room C) 0x39 Cobalt I #3

011 (Room D) 0x3D All Rooms

100 (Room E) 0x32 LSA #1
101 (Room F) 0x36 LSA #2

*110 (Room G) 0x3A LSA #3

111 (All Rooms) 0x3E All Rooms

Resulting CD5 Smart

Speaker Message's

Header

Legacy Speaker that the Console

Allows This Remote to Control

The table shows that up to three AM25P/30P II digital bass module’s and three LSA’s (labelled #1,

#2 and #3 here) can be addressed by a AV28 media center remote control. Note that a special

adapter box would be required to actually hang more than one AM25P/30P II digital bass module
and one LSA off each zone of the AV28 media center . *To control a single AM25P/30P II digital

bass module, it is recommended that the user set switches 7, 8 & 9 on the user’s AV28 RF remote
to 010 (Room C, where 0=down and 1=up). To control a single LSA, it is recommended that a user
set these switches to 110 (Room G).

27

Theory of Operation

10.0 Software

10.1 FLASH Update Capability

The software in the AV28 media center is stored in FLASH. During boot, the software is decom­pressed from the FLASH to the DRAM, where it is executed. U1 can update the contents of the
FLASH, so the software is field upgrade-able. Additionally, the console can update the FLASH
where the DSP stores its code in the LS28/35 bass module using the speaker cable.

10.2 FLASH Update Procedure

Note: A software update disc can be obtained by calling Bose service. If you have a software

update disc, check the service intranet site or call Bose service to make sure you have the latest
version.

10.3 Software Version

To find out which version of software is loaded in a console, first press the [ALL OFF] button on the
keypad. Next, press and hold the [STORE] key and press the [ENTER] key one time. The soft­ware version is displayed on the VFD in the following format: SV C:(dateCode):(version)-(build) –
for example, SV C:092501:1.0-0125 would indicate Version 1.0 code made from build #125 on
September 25, 2001.

10.4 User Settings Stored in FLASH

Certain user settings (tuner presets, OSD settings like preference for Film-EQ in a particular
source) and tuner calibration coefficients are stored in a protected area of FLASH. These are
overwritten when the software is updated. There are two important consequences:

not

• Sending an FU [Flash Update] command via ETAP will erase the user settings (but not the

tuner calibration).

• After setting any preferences (house code, tuner presets, OSD settings), you must cycle the

power on and off with the remote and wait a few seconds before unplugging the unit. When the unit
is powered off by the remote, the user preferences set in that session are stored in FLASH.

28

Disassembly/Assembly

(Refer to Figure 3)

1. Top Cover Removal

1.1 Remove the six screws (28) that secure

the top cover (7) to the base (9).

1.2 Release the catch at the right rear corner
of the top cover. Lift off the top cover.

2. Top Cover Replacement

2.1 Align the top cover (7) with the base (9)

and press down at the right rear corner to
secure the catch.

2.2 Replace the six screws (28) that secure
the top cover to the base.

3. DVD/CD Assembly Removal

3.1 Perform procedure 1.

3.2 Pressing outward on the four tabs located

on the base (9) at the bottom corners of the
DVD/CD bracket (15), lift out the DVD/CD
assembly (1).

3.3 Remove the two connectors from the
DVD/CD assembly.

3.4 Remove the four screws (22) that secure
the DVD bracket (15) to the DVD assembly.

4. DVD/CD Assembly Replacement

4.1 Align the DVD bracket (15) with the DVD

assembly (1). Replace the four screws (22)
that secure the DVD bracket to the DVD
assembly. Refer to figure 3 for DVD bracket
orientation.

4.3 With the DVD/CD assembly (1) label side
up, align the tabs on the DVD/CD bracket
(15) with the four tabs located in the base (9).
Press downward on the corners of the DVD/
CD assembly until all four tabs snap into place.

5. Tuner PCB Removal

5.1 Perform procedure 1.

5.2 Grasp the front edge of the tuner PCB (3)

0

and lift up until it is at a 45

angle.

5.3 Grasp the tuner PCB bracket support
(21), which is located under the tuner PCB,
and pull it to the left slightly to clear the
headphone jack PCB. Then pull up and
forward on the tuner PCB bracket support to
release the tuner PCB.

5.4 Remove the ribbon cable from connector
J103.

6. Tuner PCB Replacement

6.1 Attach the ribbon connector to J103.

6.2 Align the posts on the tuner PCB support

bracket (21) with the three locator holes in
the base (9).

6.3 Holding the tuner PCB (3) at a 45

0

angle,
align the two tabs located at the rear of the
tuner PCB with the two cutouts located at the
rear of the base.

6.4 Lower the front of the tuner PCB until it
rests on the tuner PCB support bracket.

4.2 Connect the two connectors to the DVD/
CD assembly.
Note: Make sure the ribbon cable connector
key is on the top when inserting the connec­tor. Line up the connector to the pins on the
receptacle and gently push in. Do not force
the connector or push on the connector at an
angle. Damage to the pins may occur.

29

Disassembly/Assembly

(Refer to Figure 3)

7. Main PCB Removal

7.1 Perform procedure 5.

7.2 Disconnect the cables from J102, J103,

J106, J213, and the DVD/CD mechanism’s
ribbon cable.

7.2 Release the main PCB (2) from the four
locking tabs located on the base (9). Two
located at the front and one located on each
side of the PCB.

7.3 Lift up the front of the main PCB and slide
it forward and up.

8. Main PCB Replacement

8.1 Lower the rear of the main PCB (2) into

the base (9) so the connectors protrude out
the rear of the base.

8.2 Align the headphone jack PCB (2) with
the hole in the side of the base. The main
PCB (2) and tuner PCB support bracket (21)
will secure the headphone jack PCB in place.

8.3 While applying rearward pressure on the
PCB, press downward at the locations of the
four locking tabs; two located at the front and
one located on each side of the PCB.

10. VFD Module Replacement

10.1 Connect the cable to J103, located on

the main PCB (2).

10.2 Slide the VFD module (6) into the VFD
holder on the base until the two locking tabs
snap into place.

11. IR PCB Removal

11.1 Perform procedure 1.

11.2 Lift up the bezel (41).

11.3 Release the IR PCB (2) from the locking

tab located on the left side of the IR PCB. Lift
up on the IR PCB and then slide it to the left.

11.4 Disconnect the cable from J1000.

12. IR PCB Replacement

12.1 Connect the cable to J1000.

12.2 Slide the IR PCB (2) under the catch on

the right side.

12.3 While aligning the IR PCB with the two
locator guides, press down until the IR PCB
snaps into place.

8.4 Connect the cables to J102, J103, J106,
J213, and the DVD/CD mechanism’s ribbon
cable.

9. VFD Module Removal

9.1 Perform procedure 1.

9.2 Release the VFD module (6) from the two

locking tabs, which are located at the two top
corners of the VFD module. Pull up the VFD
module.

9.3 Disconnect the cable from J103, located
on the main PCB (2).

13. Laser Current Measurement Access

13.1 Perform procedure 3.

13.2 Remove the four screws that secure the

bottom cover of the DVD/CD assembly (1) to
its chassis. Lift off the bottom cover.

13.3 Refer to figure 6 for the location of the
laser current measurement points and the
laser current information located on the
mechanism labels.

30

Setting-up a Computer to Issue TAP Commands

1. Open a terminal window. Click: Start/Pro-

gram/Accessories/Hyperterminal/Hyperterminal

2. In the “Connection Description” window, type
the name “AV 28 media center” then click “OK”;
any name may be entered.

3. In the “Connect To” window, select the COM
port on your computer that you will be connect­ing the AV28 media center to and then click OK.

4. In the “COM1 Properties” window, make the
selections in the various fields as shown.

5. In the Hyperterminal window, click on File/
Properties. In the Properties window, click on
the Settings tab, make the selections in the
various fields as shown.

6. In the Settings window, click on
ACSII setup and make the selec­tions and changes as shown.

Note: Terminal programs other than
hyperterminal can be used.

31

Issuing TAP Commands to the AV28 media center

1. TAP Test Cable Connection

1.1 Connect the test cable’s, part number

264565, DB-9 connector to the RS-232 COM
port on your computer. Connect the test
cable’s 3.5mm plug to the serial data jack on
the AV28 media center.

1.2 With a Hyperterminal window open, apply
power to the AV28 media center. A response
similar to the following will be displayed on
your computer screen.

Reset!

Fixture Detection ... Failed.
Phase 1 Input Pattern :11010111101
Zone Sense Bus ... Failed.
Memory Tests ... Passed.

Ready for test...

>Self-test phase has expired...
UEI Chip Result : BOS0
IR Loopback ... Passed.
Tuner Board Variant : USA
RF House Code : 0010
Booting Cirrus API...
Initializing Encoder...
ive Info...
CD/DVD Drive ... Passed.
Booting Application.

..

2. Verify the media center communicates in
TAP mode

2.1 Type the command PS C and hit “Enter”.

A response similar to the following will be
displayed on your computer screen. (power
on self test results).

Fixture Detection ... Failed.
...Phase 1 Inputs : Not Found.
I2C Bus ... Passed.
TAP Bus ... Failed.
...TAP RX : Short to ground.
Smart Speaker Bus ... Passed.
CCB Bus ... Passed.
Keypad Bus ... Passed.
VFD Bus ... Passed.
Zone Enable Bus ... Passed.
Zone Sense Bus ... Failed.
...Zone 1 Sense : Short to ground.
Zone MUX Bus ... Passed.
RF Bus ... Passed.
IR Blaster Bus ... Passed.
Miscellaneous Pins ... Passed.
All Pins Short Test ... Passed.
I2C Chip Tests ... Passed.
CCB Chip Tests ... Passed.
RF Loopback ... Passed.
Memory Tests ... Passed.
UEI Query ... Passed.
IR Loopback ... Passed.
CD/DVD Drive ... Passed.

General Test Procedure Notes

1. The media center will not turn on unless it senses a speaker connected to the Zone 1 (or Zone

2) speaker connector. Connecting a speaker cable to the Zone 1 (or Zone 2) speaker connector or
physically shorting J301 pin 8 and 5 together will allow the media center to turn on. Disconnecting
a Zone output will cause that Zone to turn off.

2. After completing any or all adjustment procedures requiring TAP commands, the FLASH
memory must be updated to store the adjustments. Refer to the Adjustment/Performance Verifica­tion Procedure 10.

3. All AM and FM adjustments must be performed when replacing a main or tuner PCB in order to
ensure an optimized tuner. All TAP related tuner adjustments are stored in FLASH memory on the
main PCB.

4. Functional/Performance Verification Tests: Contain tests to verify the performance and function
of the AV28 media center.
Adjustment/Performance Verification Procedures: Contain procedures to optimize the performance
of the AV28 media center.

32

Functional/Performance Verification Tests

AM General Test Setup

Unless otherwise noted, set an RF generator
to 1500 kHz (1503 kHz for Europe and Japan),
74 dBuV emf, 30% AM modulation, 400 Hz
modulation. Measurements are taken from the
record output. Refer to Figure 1. The equivalent
field intensity is 26 dB less than the generator
output level or 1/20th of the output voltage. The
signal levels given do not include this factor.

1. AM Sensitivity Performance Verification

1.1 Set the RF generator output for a 53 dBuV

emf field intensity, 30% AM modulation, 400Hz
and the unit and RF generator to 1080 kHz.

1.2 Reference a dB meter to the left or right
record output.

1.3 Turn off the RF generator’s modulation.

1.4 The record output should measure < -20

dB, SNR.

2. AM Seek Performance Verification

2.1 Set the RF generator to 1130 kHz (1125

kHz for Euro and Japan), AM modulation,
400 Hz modulation, 61 dBuV emf field inten­sity.

2.2 Place the unit into seek and verify the unit
stops at 1130 kHz (1125 kHz for Euro and
Japan).

2.3 Switch the RF generator for a 49 dBuV
emf field intensity and verify the radio does
not stop at 1130 kHz (1125 kHz for Euro and
Japan).

3. FM Sensitivity Performance Verification

3.1 Set the RF generator to 98.1 MHz, 1 kHz

mono modulation, pilot off, 75 kHz deviation,
17 dBf at the unit’s FM antenna input, J102.
(19 dBf for Euro and Japan)

3.2 Measure the distortion at the left or right
record output. It should be

4. FM Seek Performance Verification

4.1 Set the RF generator to 98.9 MHz, 1 kHz

mono modulation, pilot off, 75 kHz deviation,
35 dBf, at the unit’s FM antenna input, J102.

4.2 Place the unit into seek and verify that it
stops at 98.9 MHz.

4.3 Reduce the RF generator to 25 dBf.

4.4 Tune the unit to 98.1 MHz and then place

the unit into seek. Verify the radio does not
stop at 98.9 MHz.

5. Serial Data Verification

5.1 Connect an Oscilloscope to the serial

data output connector J704 pin 2.

5.2 Press volume up or down on the console.
Observe a digital wave form on the oscillo­scope.

6. TV Sensor Verification

6.1 Apply a signal to the TV Sensor input

J105 pin 2 at the level and frequency listed in
the following table. The signal should be
applied to the ring of a 3.5mm jack.

6.2 Measure the output of the detector, U303
pin 8, at J103 pin 19.
Note: Off <.8Vrms, On >2.5Vrms. Settling
time is .1 seconds to turn on, 2.0 seconds to
turn off.

Input

Frequency

Input

Amplitude

< 3.0%.

Detector

Output

60 Hz 200 mVrms <.8Vrms

15.75 kHz 30 mVrms >2.5 Vrms

31.5 kHz 30 mVrms >2.5Vrms

33

Functional/Performance Verification Tests

7. Inputs/Outputs Verification

Test Functional test for

the...

Speaker Zones output,
TV S-Video, composite

1

video output, and DVD.

Analog audio Inputs

2

Digital (S/PDIF) and

3

optical audio inputs.

Record digital (S/PDIF)
audio output, Record

4

Optical output, Record
analog output and CD.

S-Video and Composite

5

video input

Note:

Connect the Media
Center...

Speaker Zones 1, 2
output...

TV S-video output... a TV S-Video input...

TV composite video
output...

TV analog audio
input...

VCR analog audio
input...

AUX analog audio
input...

Tape analog audio
input...

TV digital (S/PDIF)
audio input...
VCR digital (S/PDIF)
audio input...
AUX digital (S/PDIF)
audio input...
Tape digital
(S/PDIF) audio
input...
Optical input... the optical output of a

Record digital
(S/PDIF) output...
Record optical
output...
Record analog
output...
S-Video input... to the S-Video output of

Composite video
input...

To... and select the

an AM28/35 powered
speaker...

a TV composite video
input...

an analog source...

a digital (S/PDIF)
source...

source...

the digital (S/PDIF)
input of a device...
the optical input of a
device...
to the analog input of a
device...

a source...

to the Composite video
output of a source...

console
source...

DVD
(insert a DVD).

TV.

VCR.

AUX.

Tape.

TV.

VCR.

AUX.

Tape.

TV and assign
the optical input
to TV.

CD.
(insert a CD).

VCR. a clean

Listen/look for..

a clean
undistorted picture
from the TV. A
clean undistorted
audio output from
the PS28/35
powered speaker.

a clean
undistorted audio
output from the
PS28/35 powered
speaker
connected to the
console's Speaker
Zones output.

a clean
undistorted audio
output from the
PS28/35 powered
speaker
connected to the
console's Speaker
Zones output.

a clean
undistorted audio
output from the
source.

undist­orted
output
from
the...

S­Video
output.
Compo

-site
video
output

1. The remote control is needed to turn on the Zone 2 output and should be used to verify the unit’s
ability to respond to remote commands. Refer to the Zone 2 Operation section on page 69.

8. CD Performance Test

8.1 The media center should be able to play the test discs listed in the following table.

Parameter Nominal Limit Suggested Test disc

Defect Tracking (void) 1.0 mm 0.8 mm Pierre Vernay, test CD#2

Defect Tracking (black dot) 1.0 mm 0.8 mm ABEX test disc TCD-725R

Defect Tracking (scratch) 1.6 mm 1.0 mm ABEX test disc TCD-721 R

Defect Tracking

(finger print)

Defect Tracking

(warped disc)

Defect Tracking

(eccentric disc)

75 mm 65 mm ABEX test disc TCD-725R

1.0 mm 0.7 mm ABEX test disc TCD-732RA

210 mm 140 mm ABEX test disc TCD-714R

34

Adjustment/Performance Verification Procedures

AM Tuner General Test Setup

Measurements are taken from the record
output. Refer to Figure 1.The equivalent field
intensity in dBuV/m is 20 dB less than the
generator output level in dBuV EMF at the
receiving antenna. The signal levels given do
not include this factor.

Figure 1. AM Test Setup

TAP Test Cable Connection

2. AM Tuner Adjustment

2.1 Set an RF generator output for a

69 dBuV/m field intensity at the unit’s an­tenna, 30% AM modulation, 1 kHz and the
unit and RF generator to 1500 kHz.

2.2 Adjust the red slug of T101 until a maxi­mum output is measured at the record output.

2.3 Set the RF generator and unit to 600 kHz.

2.4 Adjust the black slug of T101 until a

maximum output is measured at the record
output.

2.5 The adjustment of the red and black slug
affects each other. Repeat step 2.1-2.4 until
the measurement at the record output is
optimized for both adjustments.

3. AM Stop Level Adjustment, TAP

Connect the TAP test cable’s, part number
264565, DB-9 connector to the COM port on
your computer. Connect the test cable’s 3.5mm
plug to the serial data jack on the AV28 media
center. Refer to pages 31 and 32.

1. AM Sensitivity Verification

1.1 Set the RF generator output for a 53

dBuV/m field intensity at the unit’s antenna,
30% AM modulation, 1 kHz and the unit and
RF generator to 1080 kHz.

1.2 Reference a dB meter to the left or right
record output.

1.3 Turn off the RF generator’s modulation.

1.4 The record output should measure

< -20 dB.

3.1 Issue the TAP command TF.

3.2 Set the RF generator to 1080 kHz, 30%

AM modulation, 1 kHz modulation, 56 dBuV/m
field intensity at the unit’s antenna.

3.3 Issue the TAP command T2.

3.4 Set the generator to 1130 kHz (1125 kHz

for Euro and Japan), 61 dBuV/m field inten­sity.

3.5 Place the unit into seek and verify the unit
stops at 1130 kHz (1125 kHz for Euro and
Japan).

3.6 Switch the RF generator to 49 dBuV/m
field intensity. Place the unit into seek mode
and verify the unit does not stop at 1130 kHz
(1125 kHz for Euro and Japan).

3.7 Issue the TAP command TB. This will
save the adjustment in FLASH.

35

Adjustment/Performance Verification Procedures

FM Tuner General Test Setup

Connect the signal generator to the FM an­tenna jack J102 using a 50 to 75 Ohm match­ing network. Adjustments to the procedure’s
stated signal levels should be made to account
for a signal level loss due to the matching
network and/or any other losses.

4. FM IF Offset Adjustment, TAP

4.1 Issue the TAP command TF.

4.2 Set the RF generator to 98.1 MHz, no

modulation, 50 dBf, at the unit’s FM antenna
input, J102.

4.3 Issue TAP command T7.

4.4 Wait two seconds after issuing the TAP

command T7 and then switch the RF genera­tor to 1 kHz mono modulation, pilot off, 75
kHz deviation.

4.5 Measure the signal at the record output. If
it is < 0.55% THD, proceed to step 4.5. If the
distortion is > 0.55% THD, issue the TAP
command T9. Verify that the THD is now
< 0.55%.

4.6 Issue the TAP command TB. This will
save the adjustment into FLASH.

5. FM Distortion Adjustment

5.1 Set the RF generator to 98.1 MHz, 1 kHz

mono modulation, pilot off, 75 kHz deviation,
65 dBf at the unit’s FM antenna input, J102.

6. FM Sensitivity Verification

6.1 Set the RF generator to 98.1 MHz, 1 kHz

mono modulation, pilot off, 75 kHz deviation,
17 dBf at the unit’s FM antenna input, J102
(19 dBf for Euro).

6.2 Measure the THD+N at the left or right
record output. It should be < 3.0%.

7. Stereo Separation Verification

7.1 Set the RF generator to 98.1 MHz, 1 kHz

left only modulation, 10% pilot, 75 kHz total
deviation, 65 dBf at the unit’s FM antenna
input, J102.

7.2 Reference a dB meter to the left record
output.

7.3 Switch the RF generator to right only
modulation.

7.4 Measure the left record output. It should
be < -25 dB, referenced to the measurement
taken in procedure 7.2.

8. FM Stop Level Adjustment, TAP

8.1 Issue the TAP command TF.

8.2 Set the RF generator to 98.1 MHz, 1 kHz

mono modulation, pilot off, 75 kHz deviation,
30 dBf, at the unit’s FM antenna input, J102.

8.3 Issue the TAP command T3.

8.4 Switch the RF generator to 98.9 MHz, 35

dBf at the units FM antenna input, J102.

5.2 Adjust the unit to 98.1 MHz.

5.3 Measure the signal distortion and level at

the record output. The output signal should
measure
tween 520-1050 mVrms.

5.4 If the distortion is >.5%, adjust T103 for
minimum distortion. Verify the signal level is
between 520-1050 mVrms and the distortion
is <.5%.

<.5% THD+N and at a level be-

8.5 Place the unit into seek and verify that it
stops at 98.9 MHz.

8.6 Reduce the RF generator to 25 dBf at the
units FM antenna input, J102.

8.7 Place the unit into seek. Verify the radio
does not stop at 98.9 MHz.

8.8 Issue the TAP command TB. This will
save the adjustment into FLASH.

36

Adjustment/Performance Verification Procedures

9. FM Stereo Threshold Adjustment, TAP

9.1 Issue the TAP command TF.

9.2 Set the RF generator to 98.1 MHz, 1 kHz

stereo L= -R modulation, 10% pilot, 75 kHz
deviation, 40 dBf, at the unit’s FM antenna
input, J102.

9.3 Issue the TAP command T5.

9.4 Increase the RF generator output to 45

dBf. Verify there is a 1 kHz signal at the
record output.

9.5 Decrease the RF generator level to 35
dBf. Verify there is no signal at the record
output.

9.6 Issue the TAP command TB. This will
save the adjustment into FLASH.

10. TV ON Detector Verification

10.1 Apply a signal to the TV Sensor input

J105 pin 2 at the level and frequency listed in
the following table.
Note: The signal should be applied to the ring
of a 3.5 mm jack.

10.2 Measure the output of the detector,
U303 pin 8, at J103 pin 19.
Note: Off <.8Vrms, On >2.5Vrms. Settling
time is .1 seconds to turn on, 2.0 seconds to
turn off.

Input

Frequency

60 Hz 200 mVrms <.8Vrms

15.75 kHz 30 mVrms >2.5 Vrms

31.5 kHz 30 mVrms >2.5Vrms

Input

Amplitude

Detector

Output

37

REAR VIEW

Figure 2. Tap Test Cable Part Number 264565

Part List Notes

1. This part is not normally available from customer service. Approval from the Field Service

Manager is required before ordering.

2. The individual parts located on the PCB are listed in the part list.

3. This part is critical for safety purposes. Failure to use a substitute replacement with the

same safety characteristics as the recommended replacement part might create shock, fire and/or
other hazards.

4. When replacing the tuner or main PCB, the tuner alignments should be performed. The average
tuner alignment values are stored in FLASH memory, which is located on the main PCB, when the
main PCB is manufactured. The alignment procedures should be done to optimize the performance
of the tuner to compensate for PCB to PCB component variations.

38

Main Part List

Refer to Figure 3

Item

Number

1 DVD-ROM, DV-505SFV7 V1.014R7622 301728-005 or 301728-006 3

2 MAIN PCB ASSEMBLY, SLAB 276328 1 1,2,4
3 TUNER , US, PCB ASSEMBLY 260322-1 1 1, 2, 4
4 KEYPAD, PCB ASSEMBLY 254141 1 1, 2
5 PAD, HEAT TRANSFER, 14.6mm, NOTCH 262872-001 1
6 MODULE, VFD 256149-001 1
7 TOP COVER ASSEMBLY 266280-001 1
8 DOOR ASSEMBLY 264353-002 1
9 BASE, EMI 256153-001 1

10, 12 END CAP ASSY, LEFT 266437-001 1

11, 13 END CAP ASSY, RIGHT 266438-001 1

14 LENS, IR 256158-001 1
15 BRACKET, DVD 256729 1
16 PAD, SWITCH, ELASTOMERIC 256745-001 1
17 CABLE, DVD, PWR, 4 POS, 240mm 304996-265 1
18 CABLE, SIGNAL, IDE, 40 PIN, 300mm 256145-40300 1
19 CABLE, FFC, 26 POS, 130mm 256147-30130 1
20 FOOT, RUBBER 188462-001 6
21 BRACKET, SUPPORT, TUNER PCB 256748-001 1
22 SCREW, M3-0.5, SYM, PAN, XREC 256752-005 4
23 CLIP, SPACER, DAMPER 260386 1
24 PLATE, STRIKER 256756-001 1
25 SPRING, DOOR 256757-001 1
26 MAGNET, DOOR 258357 1
27 GEAR, DAMPER, UP RIGHT, TYPE-F 256797-04 1
28 SCREW, TAP, 8-11X.625, PAN, XRC/SQ 193637-10 6
29 GASKET, EMI 272391-085 1
30 GASKET, EMI 256160-002 1
31 GASKET, EMI, STRAIGHT 260383-003 1
32 GASKET, EMI 256160-004 1
33 CABLE, 10 POS, SPLIT 256734-001 1
34 CABLE, HEADPHONE, 4POS, 70mm 256775-04070 1
35 SCREW, TAPP, 6-13x.5, PAN, XREC/SQ 172783-08 1
36 GASKET, EMI 256160-005 1
37 GASKET, EMI, STRAIGHT 260383-001 1
38 CLIP, GROUNDING 258488 1
39 FACE PLATE, TRAY, DVD 277049-201 1
40 GASKET, EMI 262876-100 1
41 BEZEL 256156-201 1
42 LENS, VFD DISPLAY 256157-001 1

- SPACER ARM 263181 1

- SHIM, HEADPHONE JACK 262878 1

Description Part Number Qty Note

39

Main PCB 260318-0

Electrical Part List

(Resistors)

Reference

Designator

R1 10K, 0603, .1W, 5% 199403-103
R2 33 OHM, 0603, .1W, 5% 199403-330
R3 33 OHM, 0603, .1W, 5% 199403-330
R4 33 OHM, 0603, .1W, 5% 199403-330
R5 33 OHM, 0603, .1W, 5% 199403-330
R6 33 OHM, 0603, .1W, 5% 199403-330
R7 33 OHM, 0603, .1W, 5% 199403-330
R8 33 OHM, 0603, .1W, 5% 199403-330
R9 10K, 0603, .1W, 5% 199403-103
R10 1.0K, 0603, .1W, 1% 191465-1001
R11 10K, 0603, .1W, 5% 199403-103
R101 1.0K, 0603, .1W, 1% 191465-1001
R102 1.0K, 0603, .1W, 1% 191465-1001
R103 100 OHM, 0603, .1W, 5% 199403-101
R104 100 OHM, 0603, .1W, 5% 199403-101
R105 1.0K, 0603, .1W, 1% 191465-1001
R106 100 OHM, 0603, .1W, 5% 199403-101
R107 10K, 0603, .1W, 5% 199403-103
R108 10K, 0603, .1W, 5% 199403-103
R109 10K, 0603, .1W, 5% 199403-103
R110 10K, 0603, .1W, 5% 199403-103
R111 10K, 0603, .1W, 5% 199403-103
R112 10K, 0603, .1W, 5% 199403-103
R113 10K, 0603, .1W, 5% 199403-103
R114 10K, 0603, .1W, 5% 199403-103
R115 10K, 0603, .1W, 5% 199403-103
R116 10K, 0603, .1W, 5% 199403-103
R117 10K, 0603, .1W, 5% 199403-103
R118 10K, 0603, .1W, 5% 199403-103
R119 10K, 0603, .1W, 5% 199403-103
R121 5.6K, 0603, .1W, 5% 199403-562
R122 5.6K, 0603, .1W, 5% 199403-562
R123 10K, 0603, .1W, 5% 199403-103
R124 10K, 0603, .1W, 5% 199403-103
R125 5.6K, 0603, .1W, 5% 199403-562
R126 10K, 0603, .1W, 5% 199403-103
R127 5.6K, 0603, .1W, 5% 199403-562
R128 5.6K, 0603, .1W, 5% 199403-562
R129 10K, 0603, .1W, 5% 199403-103
R130 5.6K, 0603, .1W, 5% 199403-562
R131 10K, 0603, .1W, 5% 199403-103
R132 1.0K, 0603, .1W, 1% 191465-1001
R133 2.2K, 0603, .1W, 5% 199403-222
R134 2.2K, 0603, .1W, 5% 199403-222
R135 100 OHM, 0603, .1W, 5% 199403-101
R136 100 OHM, 0603, .1W, 5% 199403-101
R137 100 OHM, 0603, .1W, 5% 199403-101
R138 100 OHM, 0603, .1W, 5% 199403-101
R140 10K, 0603, .1W, 5% 199403-103
R141 10K, 0603, .1W, 5% 199403-103
R142 10K, 0603, .1W, 5% 199403-103
R143 2.2K, 0603, .1W, 5% 199403-222
R144 10K, 0603, .1W, 5% 199403-103

Description Part Number Note

41

Main PCB 260318-0

Electrical Part List

(Resistors continued)

Reference

Designator

R201 100K, 0603, .1W, 5% 199403-104
R202 100K, 0603, .1W, 5% 199403-104
R203 100K, 0603, .1W, 5% 199403-104
R204 100K, 0603, .1W, 5% 199403-104
R205 100K, 0603, .1W, 5% 199403-104
R206 100K, 0603, .1W, 5% 199403-104
R207 100K, 0603, .1W, 5% 199403-104
R208 100K, 0603, .1W, 5% 199403-104
R209 750 OHM, 0603, .1W, 5% 199403-751
R210 3.9K, 0603, .1W, 5% 199403-392
R211 10 OHM, 0603, .1W, 5% 199403-100
R212 2.2K, 0603, .1W, 5% 199403-222
R213 15 OHM, 0603, .1W, 5% 199403-150
R214 750 OHM, 0603, .1W, 5% 199403-751
R215 3.9K, 0603, .1W, 5% 199403-392
R216 10 OHM, 0603, .1W, 5% 199403-100
R217 2.2K, 0603, .1W, 5% 199403-222
R218 15 OHM, 0603, .1W, 5% 199403-150
R219 560 OHM, 0603, .1W, 5% 199403-561
R220 560 OHM, 0603, .1W, 5% 199403-561
R227 1.0K, 0603, .1W, 1% 191465-1001
R230 4.7K, 0603, .1W, 5% 199403-472
R231 4.7K, 0603, .1W, 5% 199403-472
R233 4.7K, 0603, .1W, 5% 199403-472
R234 4.7K, 0603, .1W, 5% 199403-472
R235 820 OHM, 0603, .1W, 5% 199403-821
R236 820 OHM, 0603, .1W, 5% 199403-821
R237 100K, 0603, .1W, 5% 199403-104
R238 100K, 0603, .1W, 5% 199403-104
R239 1.0K, 0603, .1W, 1% 191465-1001
R240 1.0K, 0603, .1W, 1% 191465-1001
R241 1.0K, 0603, .1W, 1% 191465-1001
R242 10K, 0603, .1W, 5% 199403-103
R243 1.0K, 0603, .1W, 1% 191465-1001
R244 1.0K, 0603, .1W, 1% 191465-1001
R245 1.0K, 0603, .1W, 1% 191465-1001
R246 1.0K, 0603, .1W, 1% 191465-1001
R247 1.0K, 0603, .1W, 1% 191465-1001
R248 1.0K, 0603, .1W, 1% 191465-1001
R249 1.0K, 0603, .1W, 1% 191465-1001
R250 10K, 0603, .1W, 5% 199403-103
R251 2.2K, 0603, .1W, 5% 199403-222
R252 2.2K, 0603, .1W, 5% 199403-222
R253 10K, 0603, .1W, 5% 199403-103
R254 1.0K, 0603, .1W, 1% 191465-1001
R255 1.0K, 0603, .1W, 1% 191465-1001
R256 2.2K, 0603, .1W, 5% 199403-222
R257 10K, 0603, .1W, 1% 191465-1002
R258 10K, 0603, .1W, 1% 191465-1002
R259 10K, 0603, .1W, 5% 199403-103
R301 1.33K, 0603, 100mW, 1% 191465-1331
R302 1.33K, 0603, 100mW, 1% 191465-1331
R303 47K, 0603, .1W, 5% 199403-473

Description Part Number Note

42

Main PCB 260318-0

Electrical Part List

(Resistors continued)

Reference

Designator

R304 10K, 0603, .1W, 1% 191465-1002
R305 10K, 0603, .1W, 1% 191465-1002
R306 100 OHM, 0603, .1W, 5% 199403-101
R307 100 OHM, 0603, .1W, 5% 199403-101
R308 22 OHM, 0603, .1W, 5% 199403-220
R309 100 OHM, 0603, .1W, 5% 199403-101
R312 100 OHM, 0603, .1W, 5% 199403-101
R313 22 OHM, 0603, .1W, 5% 199403-220
R314 22 OHM, 0603, .1W, 5% 199403-220
R315 2.0 OHM, 0603, SMD, 100mW 199403-2R0
R316 100 OHM, 0603, .1W, 5% 199403-101
R317 100 OHM, 0603, .1W, 5% 199403-101
R318 100 OHM, 0603, .1W, 5% 199403-101
R319 14 OHM, 0603, .1W, 1% 191465-1402
R320 14 OHM, 0603, .1W, 1% 191465-1402
R321 14 OHM, 0603, .1W, 1% 191465-1402
R322 14 OHM, 0603, .1W, 1% 191465-1402
R323 100 OHM, 0603, .1W, 5% 199403-101
R324 100 OHM, 0603, .1W, 5% 199403-101
R325 14 OHM, 0603, .1W, 1% 191465-1402
R326 14 OHM, 0603, .1W, 1% 191465-1402
R327 3.24K, 0603, .1W, 1% 191465-3241
R328 3.24K, 0603, .1W, 1% 191465-3241
R329 3.24K, 0603, .1W, 1% 191465-3241
R330 3.24K, 0603, .1W, 1% 191465-3241
R331 14 OHM, 0603, .1W, 1% 191465-1402
R332 14 OHM, 0603, .1W, 1% 191465-1402
R333 432 OHM, 0603, 100MW, 1% 191465-4320
R334 432 OHM, 0603, 100MW, 1% 191465-4320
R335 100K, 0603, .1W, 5% 199403-104
R336 100K, 0603, .1W, 5% 199403-104
R337 49.9 OHM, 0603, .1W, 1% 191465-49R9
R338 10K, 0603, .1W, 5% 199403-103
R339 10K, 0603, .1W, 5% 199403-103
R340 JUMPER, CHIP, 0603 196042
R341 JUMPER, CHIP, 0603 196042
R342 330 OHM, 0603, .1W, 5% 199403-331
R343 4.7K, 0603, .1W, 5% 199403-472
R344 4.7K, 0603, .1W, 5% 199403-472
R345 4.7K, 0603, .1W, 5% 199403-472
R346 432 OHM, 0603, 100MW, 1% 191465-4320
R347 191 OHM, 0603, .1W, 1% 191465-1910
R348 432 OHM, 0603, 100MW, 1% 191465-4320
R349 191 OHM, 0603, .1W, 1% 191465-1910
R350 4.7K, 0603, .1W, 5% 199403-472
R351 100 OHM, 0603, .1W, 5% 199403-101
R352 1.0K, 0603, .1W, 1% 191465-1001
R353 100 OHM, 0603, .1W, 5% 199403-101
R354 332 OHM, 0603, .1W, 1% 191465-3320
R401 1.33K, 0603, 100mW, 1% 191465-1331
R402 1.33K, 0603, 100mW, 1% 191465-1331
R403 10K, 0603, .1W, 1% 191465-1002
R404 10K, 0603, .1W, 1% 191465-1002

Description Part Number Note

43

Main PCB 260318-0

Electrical Part List

(Resistors continued)

Reference

Designator

R405 100 OHM, 0603, .1W, 5% 199403-101
R406 100 OHM, 0603, .1W, 5% 199403-101
R407 100 OHM, 0603, .1W, 5% 199403-101
R410 100 OHM, 0603, .1W, 5% 199403-101
R411 100 OHM, 0603, .1W, 5% 199403-101
R412 2.0 OHM, 0603, SMD, 100mW 199403-2R0
R413 100 OHM, 0603, .1W, 5% 199403-101
R414 100 OHM, 0603, .1W, 5% 199403-101
R415 14 OHM, 0603, .1W, 1% 191465-1402
R416 14 OHM, 0603, .1W, 1% 191465-1402
R417 14 OHM, 0603, .1W, 1% 191465-1402
R418 14 OHM, 0603, .1W, 1% 191465-1402
R419 100 OHM, 0603, .1W, 5% 199403-101
R420 100 OHM, 0603, .1W, 5% 199403-101
R421 14 OHM, 0603, .1W, 1% 191465-1402
R422 14 OHM, 0603, .1W, 1% 191465-1402
R423 3.24K, 0603, .1W, 1% 191465-3241
R424 3.24K, 0603, .1W, 1% 191465-3241
R425 3.24K, 0603, .1W, 1% 191465-3241
R426 3.24K, 0603, .1W, 1% 191465-3241
R427 14 OHM, 0603, .1W, 1% 191465-1402
R428 14 OHM, 0603, .1W, 1% 191465-1402
R429 1.0K, 0603, .1W, 1% 191465-1001
R430 1.0K, 0603, .1W, 1% 191465-1001
R431 100K, 0603, .1W, 5% 199403-104
R432 100K, 0603, .1W, 5% 199403-104
R433 49.9 OHM, 0603, .1W, 1% 191465-49R9
R434 10K, 0603, .1W, 5% 199403-103
R435 10K, 0603, .1W, 5% 199403-103
R436 JUMPER, CHIP, 0603 196042
R437 JUMPER, CHIP, 0603 196042
R438 330 OHM, 0603, .1W, 5% 199403-331
R439 1.0K, 0603, .1W, 1% 191465-1001
R440 100 OHM, 0603, .1W, 5% 199403-101
R441 332 OHM, 0603, .1W, 1% 191465-3320
R501 75 OHM, 0603, 0.1W, 5% 199403-750
R502 75 OHM, 0603, 0.1W, 5% 199403-750
R503 75 OHM, 0603, 0.1W, 5% 199403-750
R504 75 OHM, 0603, 0.1W, 5% 199403-750
R505 75 OHM, 0603, 0.1W, 5% 199403-750
R506 75 OHM, 0603, 0.1W, 5% 199403-750
R507 75 OHM, 0603, 0.1W, 5% 199403-750
R508 75 OHM, 0603, 0.1W, 5% 199403-750
R509 2.2K, 0603, .1W, 5% 199403-222
R510 3.3K, 0603, .1W, 5% 199403-332
R511 47K, 0603, .1W, 5% 199403-473
R512 100 OHM, 0603, .1W, 5% 199403-101
R513 909 OHM, 0603, .1W, 1% 191465-9090
R514 100 OHM, 0603, .1W, 5% 199403-101
R515 100 OHM, 0603, .1W, 5% 199403-101
R516 100 OHM, 0603, .1W, 5% 199403-101
R517 100 OHM, 0603, .1W, 5% 199403-101
R522 10K, 0603, .1W, 1% 191465-1002

Description Part Number Note

44

Main PCB 260318-0

Electrical Part List

(Resistors continued)

Reference

Designator

R523 10K, 0603, .1W, 1% 191465-1002
R532 16.2K, 0603, .1W, 1% 191465-1622
R533 16.2K, 0603, .1W, 1% 191465-1622
R534 100 OHM, 0603, .1W, 5% 199403-101
R601 100 OHM, 0603, .1W, 5% 199403-101
R603 10K, 0603, .1W, 5% 199403-103
R604 4.02K, 0603, .1W, 1% 191465-4021
R605 75 OHM, 0603, 0.1W, 5% 199403-750
R606 75 OHM, 0603, 0.1W, 5% 199403-750
R607 75 OHM, 0603, 0.1W, 5% 199403-750
R608 75 OHM, 0603, 0.1W, 5% 199403-750
R609 75 OHM, 0603, 0.1W, 5% 199403-750
R610 75 OHM, 0603, 0.1W, 5% 199403-750
R611 2.0K, 0603, .1W, 5% 199403-202
R612 75 OHM, 0603, 0.1W, 5% 199403-750
R613 75 OHM, 0603, 0.1W, 5% 199403-750
R614 75 OHM, 0603, 0.1W, 5% 199403-750
R615 75 OHM, 0603, 0.1W, 5% 199403-750
R616 75 OHM, 0603, 0.1W, 5% 199403-750
R617 75 OHM, 0603, 0.1W, 5% 199403-750
R618 10K, 0603, .1W, 5% 199403-103
R623 4.7K, 0603, .1W, 5% 199403-472
R624 4.7K, 0603, .1W, 5% 199403-472
R627 10K, 0603, .1W, 1% 191465-1002
R629 10K, 0603, .1W, 1% 191465-1002
R630 10K, 0603, .1W, 1% 191465-1002
R631 4.99K, 0603, .1W, 1% 191465-4991
R632 10K, 0603, .1W, 1% 191465-1002
R633 10K, 0603, .1W, 1% 191465-1002
R634 10K, 0603, .1W, 1% 191465-1002
R635 4.99K, 0603, .1W, 1% 191465-4991
R701 100 OHM, 0603, .1W, 5% 199403-101
R702 100 OHM, 0603, .1W, 5% 199403-101
R703 100 OHM, 0603, .1W, 5% 199403-101
R704 100 OHM, 0603, .1W, 5% 199403-101
R705 1.0K, 0603, .1W, 1% 191465-1001
R706 100 OHM, 0603, .1W, 5% 199403-101
R707 100 OHM, 0603, .1W, 5% 199403-101
R708 100 OHM, 0603, .1W, 5% 199403-101
R709 100 OHM, 0603, .1W, 5% 199403-101
R710 100 OHM, 0603, .1W, 5% 199403-101
R711 249 OHM, 0603, .1W, 1% 191465-2490
R712 107 OHM, 0603, 100mW, SMD, 1% 191465-1070
R713 10K, 0603, .1W, 5% 199403-103
R714 22 OHM, 0603, .1W, 5% 199403-220
R715 22 OHM, 0603, .1W, 5% 199403-220
R716 1.5K, 0603, SMD, 100mW, 5% 199403-152
R718 100 OHM, 0603, .1W, 5% 199403-101
R728 1.0K, 0603, .1W, 1% 191465-1001
R729 75 OHM, 0603, 0.1W, 5% 199403-750
R730 75 OHM, 0603, 0.1W, 5% 199403-750
R732 2.2K, 0603, .1W, 5% 199403-222
R733 10K, 0603, .1W, 5% 199403-103

Description Part Number Note

45

Main PCB 260318-0

Electrical Part List

(Resistors continued)

Reference

Designator

R734 10K, 0603, .1W, 5% 199403-103
R735 1.0K, 0603, .1W, 1% 191465-1001
R736 10K, 0603, .1W, 5% 199403-103
R737 1.0K, 0603, .1W, 1% 191465-1001
R738 1M, 0603, .1W, 5% 199403-105
R739 33 OHM, 0603, .1W, 5% 199403-330
R740 33 OHM, 0603, .1W, 5% 199403-330
R741 100 OHM, 0603, .1W, 5% 199403-101
R742 100 OHM, 0603, .1W, 5% 199403-101
R743 100 OHM, 0603, .1W, 5% 199403-101
R744 100 OHM, 0603, .1W, 5% 199403-101
R745 100 OHM, 0603, .1W, 5% 199403-101
R746 100 OHM, 0603, .1W, 5% 199403-101
R748 10K, 0603, .1W, 5% 199403-103
R749 100 OHM, 0603, .1W, 5% 199403-101
R750 10K, 0603, .1W, 5% 199403-103
R751 1.5K, 0603, SMD, 100mW, 5% 199403-152
R752 4.7K, 0603, .1W, 5% 199403-472
R753 100 OHM, 0603, .1W, 5% 199403-101
R754 100 OHM, 0603, .1W, 5% 199403-101
R802 33.2K, 0603, .1W, 1% 191465-3322
R803 33.2K, 0603, .1W, 1% 191465-3322
R805 6.04K, 0603, .1W, 1% 191465-6041
R806 9.09 OHM, 0603, .1W, 1% 191465-9091
R810 10K, 0603, .1W, 1% 191465-1002
R811 18.2K, 0603, .1W, 1% 191465-1822
R815 100 OHM, 0603, .1W, 5% 199403-101
R819 100 OHM, 0603, .1W, 5% 199403-101
R820 100 OHM, 0603, .1W, 5% 199403-101
R821 100 OHM, 0603, .1W, 5% 199403-101
R823 10K, 0603, .1W, 5% 199403-103
R824 1.8K, 0603, SMD, 100mW, 5% 199403-182
R825 10K, 0603, .1W, 5% 199403-103
R826 1.0K, 0603, .1W, 1% 191465-1001
R827 10K, 0603, .1W, 5% 199403-103
R829 499 OHM, 0603, .1W, 1% 191465-4990
R831 1.0K, 0603, .1W, 1% 191465-1001
R832 10K, 0603, .1W, 5% 199403-103
R833 1.0K, 0603, .1W, 1% 191465-1001
R834 1.0K, 0603, .1W, 1% 191465-1001
R835 1.0K, 0603, .1W, 1% 191465-1001
R1000 100 OHM, 0603, .1W, 5% 199403-101
R1001 1K, 0603, .1W, 5% 199403-102
R1002 4.7K, 0603, .1W, 5% 199403-472

Description Part Number Note

46

Main PCB 260318-0

Electrical Part List

(Capacitors)

Reference

Designator

C1 .047uF, 0603, X7R, 25V, 5% 196999-473
C2 .047uF, 0603, X7R, 25V, 5% 196999-473
C3 .047uF, 0603, X7R, 25V, 5% 196999-473
C4 .047uF, 0603, X7R, 25V, 5% 196999-473
C5 2.2uF, 1206, X7R, 10V, 20% 260361-2253
C6 .047uF, 0603, X7R, 25V, 5% 196999-473
C7 1000pF, 0603, X7R, 50V 191470-102
C8 .047uF, 0603, X7R, 25V, 5% 196999-473
C9 1000pF, 0603, X7R, 50V 191470-102
C10 .047uF, 0603, X7R, 25V, 5% 196999-473
C11 2.2uF, 1206, X7R, 10V, 20% 260361-2253
C12 .047uF, 0603, X7R, 25V, 5% 196999-473
C13 1000pF, 0603, X7R, 50V 191470-102
C14 .047uF, 0603, X7R, 25V, 5% 196999-473
C15 1000pF, 0603, X7R, 50V 191470-102
C16 .047uF, 0603, X7R, 25V, 5% 196999-473
C17 1000pF, 0603, X7R, 50V 191470-102
C18 .047uF, 0603, X7R, 25V, 5% 196999-473
C101 .047uF, 0603, X7R, 25V, 5% 196999-473
C102 .047uF, 0603, X7R, 25V, 5% 196999-473
C103 .047uF, 0603, X7R, 25V, 5% 196999-473
C104 .047uF, 0603, X7R, 25V, 5% 196999-473
C105 10uF, EL, 85, 16V, 20% 177902-100C
C107 .047uF, 0603, X7R, 25V, 5% 196999-473
C108 .047uF, 0603, X7R, 25V, 5% 196999-473
C109 .047uF, 0603, X7R, 25V, 5% 196999-473
C110 .047uF, 0603, X7R, 25V, 5% 196999-473
C112 100pF, 0603, COG, 50V, 5% 188454-101
C113 .047uF, 0603, X7R, 25V, 5% 196999-473
C114 330pF, 0603, COG, 50V, 5% 188454-331
C115 330pF, 0603, COG, 50V, 5% 188454-331
C116 330pF, 0603, COG, 50V, 5% 188454-331
C117 330pF, 0603, COG, 50V, 5% 188454-331
C118 330pF, 0603, COG, 50V, 5% 188454-331
C119 330pF, 0603, COG, 50V, 5% 188454-331
C120 330pF, 0603, COG, 50V, 5% 188454-331
C121 330pF, 0603, COG, 50V, 5% 188454-331
C201 180pF, 0603, COG, 50V 188454-181
C202 180pF, 0603, COG, 50V 188454-181
C203 180pF, 0603, COG, 50V 188454-181
C204 180pF, 0603, COG, 50V 188454-181
C205 180pF, 0603, COG, 50V 188454-181
C206 180pF, 0603, COG, 50V 188454-181
C207 180pF, 0603, COG, 50V 188454-181
C208 180pF, 0603, COG, 50V 188454-181
C209 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C210 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C211 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C212 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C213 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C214 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C215 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C216 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V

Description Part Number Note

47

Main PCB 260318-0

Electrical Part List

(Capacitors continued)

Reference

Designator

C219 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C220 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C221 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C222 .047uF, 0603, X7R, 25V, 5% 196999-473
C223 .01uF, 0603, X7R, 50V 191470-103
C224 .01uF, 0603, X7R, 50V 191470-103
C225 .047uF, 0603, X7R, 25V, 5% 196999-473
C226 .047uF, 0603, X7R, 25V, 5% 196999-473
C227 1uF, EL, 85, 50V, 20% 177902-010H
C228 1uF, EL, 85, 50V, 20% 177902-010H
C229 22uF, EL, 85, 20%, 16V 177902-220C
C230 22uF, EL, 85, 20%, 16V 177902-220C
C231 .047uF, 0603, X7R, 25V, 5% 196999-473
C232 1uF, EL, 85, 50V, 20% 177902-010H
C233 2200pF, 0603, X7R, 50V 191470-222
C234 2200pF, 0603, X7R, 50V 191470-222
C239 .047uF, 0603, X7R, 25V, 5% 196999-473
C240 1000pF, 0603, X7R, 50V 191470-102
C241 1000uF EL, 85, 16V, 20% 149948-102C
C242 1000uF EL, 85, 16V, 20% 149948-102C
C243 1000pF, 0603, X7R, 50V 191470-102
C246 100pF, 0603, COG, 50V, 5% 188454-101
C247 100pF, 0603, COG, 50V, 5% 188454-101
C248 1000pF, 0603, X7R, 50V 191470-102
C249 1000pF, 0603, X7R, 50V 191470-102
C250 1000pF, 0603, X7R, 50V 191470-102
C251 10uF, EL, 85, 25V, 20% 177902-100E
C252 .047uF, 0603, X7R, 25V, 5% 196999-473
C253 1000pF, 0603, X7R, 50V 191470-102
C254 1000pF, 0603, X7R, 50V 191470-102
C302 10uF, EL, 85, 16V, 20% 177902-100C
C303 10uF, EL, 85, 16V, 20% 177902-100C
C305 .047uF, 0603, X7R, 25V, 5% 196999-473
C306 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C307 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C312 1.0uF, 1206, X7R, 16V 181998-105
C313 .047uF, 0603, X7R, 25V, 5% 196999-473
C314 .047uF, 0603, X7R, 25V, 5% 196999-473
C315 1.0uF, 1206, X7R, 16V 181998-105
C316 1.0uF, 1206, X7R, 16V 181998-105
C317 39pF, 0603, COG, 50V, 5% 188454-390
C318 .047uF, 0603, X7R, 25V, 5% 196999-473
C319 .047uF, 0603, X7R, 25V, 5% 196999-473
C320 39pF, 0603, COG, 50V, 5% 188454-390
C321 1.0uF, 1206, X7R, 16V 181998-105
C322 1000pF, 0603, X7R, 50V 191470-102
C323 1000pF, 0603, X7R, 50V 191470-102
C324 1000pF, 0603, X7R, 50V 191470-102
C325 1000pF, 0603, X7R, 50V 191470-102
C326 .047uF, 0603, X7R, 25V, 5% 196999-473
C327 220pF, 0603, COG, 50V, 5% 188454-221
C328 220pF, 0603, COG, 50V, 5% 188454-221
C329 220pF, 0603, COG, 50V, 5% 188454-221

Description Part Number Note

48

Main PCB 260318-0

Electrical Part List

(Capacitors continued)

Reference

Designator

C330 220pF, 0603, COG, 50V, 5% 188454-221
C331 22uF, EL, 85, 20%, 16V 177902-220C
C332 22uF, EL, 85, 20%, 16V 177902-220C
C333 .047uF, 0603, X7R, 25V, 5% 196999-473
C334 2200pF, 0603, X7R, 50V 191470-222
C335 2200pF, 0603, X7R, 50V 191470-222
C336 .047uF, 0603, X7R, 25V, 5% 196999-473
C338 1000pF, 0603, X7R, 50V 191470-102
C339 390pF, 0603, COG, 50V 188454-391
C340 390pF, 0603, COG, 50V 188454-391
C341 1500pF, 0603, X7R, 50V 191470-152
C342 1500pF, 0603, X7R, 50V 191470-152
C343 1000pF, 0603, X7R, 50V 191470-102
C344 1000pF, 0603, X7R, 50V 191470-102
C405 .047uF, 0603, X7R, 25V, 5% 196999-473
C406 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C408 10uF, EL, 85, 16V, 20% 177902-100C
C410 10uF, EL, 85, 16V, 20% 177902-100C
C412 1.0uF, 1206, X7R, 16V 181998-105
C413 .047uF, 0603, X7R, 25V, 5% 196999-473
C414 .047uF, 0603, X7R, 25V, 5% 196999-473
C415 1.0uF, 1206, X7R, 16V 181998-105
C416 1.0uF, 1206, X7R, 16V 181998-105
C417 .047uF, 0603, X7R, 25V, 5% 196999-473
C418 .047uF, 0603, X7R, 25V, 5% 196999-473
C419 1.0uF, 1206, X7R, 16V 181998-105
C420 1000pF, 0603, X7R, 50V 191470-102
C421 1000pF, 0603, X7R, 50V 191470-102
C422 1000pF, 0603, X7R, 50V 191470-102
C423 1000pF, 0603, X7R, 50V 191470-102
C424 .047uF, 0603, X7R, 25V, 5% 196999-473
C425 220pF, 0603, COG, 50V, 5% 188454-221
C426 220pF, 0603, COG, 50V, 5% 188454-221
C427 220pF, 0603, COG, 50V, 5% 188454-221
C428 220pF, 0603, COG, 50V, 5% 188454-221
C429 22uF, EL, 85, 20%, 16V 177902-220C
C430 22uF, EL, 85, 20%, 16V 177902-220C
C431 .047uF, 0603, X7R, 25V, 5% 196999-473
C432 .047uF, 0603, X7R, 25V, 5% 196999-473
C433 2200pF, 0603, X7R, 50V 191470-222
C434 2200pF, 0603, X7R, 50V 191470-222
C436 1000pF, 0603, X7R, 50V 191470-102
C437 390pF, 0603, COG, 50V 188454-391
C438 390pF, 0603, COG, 50V 188454-391
C439 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C441 1500pF, 0603, X7R, 50V 191470-152
C442 1500pF, 0603, X7R, 50V 191470-152
C501 .047uF, 0603, X7R, 25V, 5% 196999-473
C502 .01uF, 0603, X7R, 50V 191470-103
C503 .01uF, 0603, X7R, 50V 191470-103
C504 .01uF, 0603, X7R, 50V 191470-103
C505 .01uF, 0603, X7R, 50V 191470-103
C506 .01uF, 0603, X7R, 50V 191470-103

Description Part Number Note

49

Main PCB 260318-0

Electrical Part List

(Capacitors continued)

Reference

Designator

C507 .01uF, 0603, X7R, 50V 191470-103
C508 .01uF, 0603, X7R, 50V 191470-103
C509 .01uF, 0603, X7R, 50V 191470-103
C513 .047uF, 0603, X7R, 25V, 5% 196999-473
C515 1uF, EL, 85, 50V, 20% 177902-010H
C516 .033uF, 0603, X7R, 25V 196999-333
C517 .047uF, 0603, X7R, 25V, 5% 196999-473
C528 .047uF, 0603, X7R, 25V, 5% 196999-473
C529 .047uF, 0603, X7R, 25V, 5% 196999-473
C530 1uF, EL, 85, 50V, 20% 177902-010H
C531 1uF, EL, 85, 50V, 20% 177902-010H
C535 .047uF, 0603, X7R, 25V, 5% 196999-473
C536 1uF, EL, 85, 50V, 20% 177902-010H
C541 .047uF, 0603, X7R, 25V, 5% 196999-473
C542 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C543 4.7uF, EL, SMD, 85, 35V, 20% 177902-4R7V
C544 100pF, 0603, COG, 50V, 5% 188454-101
C545 100pF, 0603, COG, 50V, 5% 188454-101
C546 .047uF, 0603, Y5V, 16V 191471-473
C547 .047uF, 0603, Y5V, 16V 191471-473
C548 1uF, EL, 85, 50V, 20% 177902-010H
C601 22uF, EL, 85, 20%, 16V 177902-220C
C602 .047uF, 0603, X7R, 25V, 5% 196999-473
C603 .047uF, 0603, X7R, 25V, 5% 196999-473
C604 180pF, 0603, COG, 50V 188454-181
C605 180pF, 0603, COG, 50V 188454-181
C606 180pF, 0603, COG, 50V 188454-181
C607 22pF, 0603, COG, 50V, 5% 188454-220
C608 22pF, 0603, COG, 50V, 5% 188454-220
C609 22pF, 0603, COG, 50V, 5% 188454-220
C610 220pF, 0603, COG, 50V, 5% 188454-221
C611 220pF, 0603, COG, 50V, 5% 188454-221
C612 220pF, 0603, COG, 50V, 5% 188454-221
C613 10uF, EL, 85, 16V, 20% 177902-100C
C614 10uF, EL, 85, 16V, 20% 177902-100C
C615 10uF, EL, 85, 16V, 20% 177902-100C
C616 10uF, EL, 85, 16V, 20% 177902-100C
C617 10uF, EL, 85, 16V, 20% 177902-100C
C618 10uF, EL, 85, 16V, 20% 177902-100C
C620 .01uF, 0603, X7R, 50V 191470-103
C621 220uF, EL, SMD, 105, 16V, 20% 255071-221C
C622 22uF, EL, 85, 16V, 20% 177902-220C
C623 22uF, EL, 85, 16V, 20% 177902-220C
C624 220uF, EL, SMD, 105, 16V, 20% 255071-221C
C625 22uF, EL, 85, 20%, 16V 177902-220C
C626 100uF, EL, SMD, 105, 25V, 20% 255071-101E
C627 100uF, TANT, SMD, 10V, 10% 196981-A107C1
C628 1000pF, 0603, X7R, 50V 191470-102
C629 1000pF, 0603, X7R, 50V 191470-102
C637 .047uF, 0603, X7R, 25V, 5% 196999-473
C638 .047uF, 0603, X7R, 25V, 5% 196999-473
C639 .047uF, 0603, X7R, 25V, 5% 196999-473
C640 .047uF, 0603, X7R, 25V, 5% 196999-473

Description Part Number Note

50

Main PCB 260318-0

Electrical Part List

(Capacitors continued)

Reference

Designator

C641 1uF, TANT, 35V, 1411, 20% 188588-105
C642 1uF, TANT, 35V, 1411, 20% 188588-105
C643 1uF, TANT, 35V, 1411, 20% 188588-105
C644 100pF, 0603, COG, 50V, 5% 188454-101
C645 100pF, 0603, COG, 50V, 5% 188454-101
C646 100pF, 0603, COG, 50V, 5% 188454-101
C647 100pF, 0603, COG, 50V, 5% 188454-101
C648 100pF, 0603, COG, 50V, 5% 188454-101
C649 100pF, 0603, COG, 50V, 5% 188454-101
C650 1uF, TANT, 35V, 1411, 20% 188588-105
C651 1uF, TANT, 35V, 1411, 20% 188588-105
C701 .047uF, 0603, X7R, 25V, 5% 196999-473
C702 390pF, 0603, COG, 50V 188454-391
C704 30pF, 0603, COG, 50V, 5% 188454-300
C705 390pF, 0603, COG, 50V 188454-391
C706 .047uF, 0603, X7R, 25V, 5% 196999-473
C707 30pF, 0603, COG, 50V, 5% 188454-300
C708 390pF, 0603, COG, 50V 188454-391
C709 .047uF, 0603, X7R, 25V, 5% 196999-473
C710 .047uF, 0603, X7R, 25V, 5% 196999-473
C711 4.7nF, 0603, X7R, 25V, 5% 196999-472
C712 4.7nF, 0603, X7R, 25V, 5% 196999-472
C713 4.7nF, 0603, X7R, 25V, 5% 196999-472
C714 4.7nF, 0603, X7R, 25V, 5% 196999-472
C716 4.7nF, 0603, X7R, 25V, 5% 196999-472
C717 4.7nF, 0603, X7R, 25V, 5% 196999-472
C718 4.7nF, 0603, X7R, 25V, 5% 196999-472
C719 4.7nF, 0603, X7R, 25V, 5% 196999-472
C720 4.7nF, 0603, X7R, 25V, 5% 196999-472
C721 4.7nF, 0603, X7R, 25V, 5% 196999-472
C722 4.7nF, 0603, X7R, 25V, 5% 196999-472
C723 4.7nF, 0603, X7R, 25V, 5% 196999-472
C724 4.7nF, 0603, X7R, 25V, 5% 196999-472
C725 4.7nF, 0603, X7R, 25V, 5% 196999-472
C726 4.7nF, 0603, X7R, 25V, 5% 196999-472
C727 4.7nF, 0603, X7R, 25V, 5% 196999-472
C728 4.7nF, 0603, X7R, 25V, 5% 196999-472
C729 4.7nF, 0603, X7R, 25V, 5% 196999-472
C730 .047uF, 0603, X7R, 25V, 5% 196999-473
C733 1000pF, 0603, X7R, 50V 191470-102
C734 1000pF, 0603, X7R, 50V 191470-102
C735 .047uF, 0603, X7R, 25V, 5% 196999-473
C736 .047uF, 0603, X7R, 25V, 5% 196999-473
C737 100pF, 0603, COG, 50V, 5% 188454-101
C739 .047uF, 0603, X7R, 25V, 5% 196999-473
C740 .047uF, 0603, X7R, 25V, 5% 196999-473
C741 .047uF, 0603, X7R, 25V, 5% 196999-473
C742 2.2uF, 1206, X7R, 10V, 20% 260361-2253
C801 330uF, EL, 105, 50V, 20% 258490-331B24H
C803 330uF, EL, 105, 50V, 20% 258490-331B24H
C805 0.1uF, 0805, X7R, 50V, 10% 133624
C806 0.1uF, 0805, X7R, 50V, 10% 133624
C808 2200pF, 0603, X7R, 50V 191470-222

Description Part Number Note

51

Main PCB 260318-0

Electrical Part List

(Capacitors continued)

Reference

Designator

C809 2200pF, 0603, X7R, 50V 191470-222
C812 .047uF, 0603, X7R, 25V, 5% 196999-473
C813 .1uF, 0805, X7R, 10%, 25V 181264-104
C814 .047uF, 0603, X7R, 25V, 5% 196999-473
C815 .1uF, 0805, X7R, 10%, 25V 181264-104
C816 680pF, 0603, X7R, 50V 191470-681
C819 0.47uF, 1812, X7R, 50V, 20% 258418-4743
C820 820pF, 0603, X7R, 50V 191470-821
C821 0.47uF, 1812, X7R, 50V, 20% 258418-4743
C822 0.47uF, 1812, X7R, 50V, 20% 258418-4743
C824 0.47uF, 1812, X7R, 50V, 20% 258418-4743
C828 1000uF, EL, 105, 25V, 20% 258490-102B25E
C832 1000uF, EL, 105, 25V, 20% 258490-102B25E
C837 .047uF, 0603, X7R, 25V, 5% 196999-473
C838 .047uF, 0603, X7R, 25V, 5% 196999-473
C839 330uF, EL, SMD, 105, 10V, 20% 256772-331A
C840 .047uF, 0805, X7R, 50V, 10% 133623-473
C841 .047uF, 0805, X7R, 50V, 10% 133623-473
C842 .047uF, 0805, X7R, 50V, 10% 133623-473
C843 .047uF, 0805, X7R, 50V, 10% 133623-473
C844 .047uF, 0603, X7R, 25V, 5% 196999-473
C845 .047uF, 0603, X7R, 25V, 5% 196999-473
C846 .047uF, 0805, X7R, 50V, 10% 133623-473
C847 .047uF, 0805, X7R, 50V, 10% 133623-473
C848 680pF, 0603, X7R, 50V 191470-681
C849 3.9nF, 0603, X7R, 25V, 5% 196999-392
C1001 22uF, EL, 85, 20%, 16V 177902-220C

Description Part Number Note

(Diodes)

Reference

Designator

D1 SHOTTKY, BAT42W, SOD-123 196984-002
D2 SHOTTKY, BAT42W, SOD-123 196984-002
D7 BAV99, SOT23 147239
D8 BAV99, SOT23 147239
D100 BAV99, SOT23 147239
D101 BAV99, SOT23 147239
D102 BAV99, SOT23 147239
D103 BAV99, SOT23 147239
D104 BAV99, SOT23 147239
D105 BAV99, SOT23 147239
D201 SOT, MMBD914LT1 148582
D202 BAV99, SOT23 147239
D203 BAV99, SOT23 147239
D204 BAV99, SOT23 147239
D205 BAV99, SOT23 147239
D206 DUAL, SOT-23, BAW56 180738
D207 BAV99, SOT23 147239
D208 BAV99, SOT23 147239
D301 BAV99, SOT23 147239
D302 BAV99, SOT23 147239

Description Part Number Note

52

Main PCB 260318-0

Electrical Part List

(Diodes continued)

Reference

Designator

D304 1N5232, ZENER, 5.6V, 225 mW 135247-5232
D305 BAV99, SOT23 147239
D306 1N5232, ZENER, 5.6V, 225 mW 135247-5232
D401 BAV99, SOT23 147239
D402 BAV99, SOT23 147239
D403 BAV99, SOT23 147239
D501 BAV99, SOT23 147239
D502 BAV99, SOT23 147239
D503 BAV99, SOT23 147239
D504 BAV99, SOT23 147239
D601 BAV99, SOT23 147239
D602 BAV99, SOT23 147239
D603 BAV99, SOT23 147239
D604 BAV99, SOT23 147239
D605 BAV99, SOT23 147239
D606 BAV99, SOT23 147239
D703 BAV99, SOT23 147239
D704 BAV99, SOT23 147239
D705 BAV99, SOT23 147239
D706 SHOTTKY, BAT42W, SOD-123 196984-002
D707 DUAL, SOT-23, BAW56 180738
D801 SB560 254110-005
D803 SCHOTTKY, 40V, 3A, SMB 193847-001
D1000 BAV99, SOT23 147239
D1002 56107, IR EMITTING 256733-002
D1003 56107, IR EMITTING 256733-002
D1004 56107, IR EMITTING 256733-002
D1005 56107, IR EMITTING 256733-002

Description Part Number Note

(Transistors)

Reference

Designator

Q101 SOT-23 260354-001
Q103 2SA1521, P, SOT, 2.2K 180789
Q105 2SA1521, P, SOT, 2.2K 180789
Q106 NPN, SOT, 47K 146817
Q201 NPN, SOT, 47K 146817
Q202 SOT-23 260354-001
Q203 NPN, SOT, 47K 146817
Q204 SOT-23 260354-001
Q205 NPN, SOT, 2SC4695 148770
Q206 NPN, SOT, 2SC4695 148770
Q207 PNP, SOT, 47K 146818
Q210 NPN, SOT, 47K 146817
Q211 NPN, SOT, 47K 146817
Q212 PNP, SOT, 47K 146818
Q213 PNP, SOT, 47K 146818
Q214 PNP, SOT, 47K 146818
Q300 NPN, SOT, 2SC4695 148770
Q301 NPN, SOT, 2SC4695 148770
Q302 PNP, SOT, 47K 146818

Description Part Number Note

53

Main PCB 260318-0

Electrical Part List

(Transistors continued)

Reference

Designator

Q303 NPN, SOT, 2SC4695 148770
Q304 NPN, SOT, 2SC4695 148770
Q601 NPN, SOT, 47K 146817
Q602 NPN, SOT, MMBT3904 146819
Q603 NPN, SOT, MMBT3904 146819
Q703 NPN, SOT, 47K 146817
Q705 SOT-23 260354-001
Q706 SOT-23 260354-001
Q801 NPN, 15V, 200MA, SOT-23 254111-001
Q802 PNP, SOT, MMBT3906 148596
Q803 NPN, SOT, 47K 146817
Q804 NPN, 15V, 200MA, SOT-23 254111-001
Q805 NPN, SOT, 47K 146817
Q1000 IR RECEIVER MODULE 256780-001

Description Part Number Note

(Integrated Circuits continued)

Reference

Designator

U1 DVD DECODER, CS98000 254107-001
U2 FLASH, 16M, 3.3V, TSSOP, 90NS
U3 SDRAM, 64MBIT, 2MX32, 3.3V 254182-080
U201 AUDIO MATRIX, SO28 177984-2
U202 DAC, 96KHZ, 3-5V, CS4340-KS 256087-001
U204 OPAMP, DUAL, SINGLE SUPPLY 256740-001
U205 OPAMP, DUAL, HI CURRENT 256741-001
U302 QUAD 2 CHANNEL MUX, 74LCX157 260377-001
U303 CODEC AUDIO, CS4224, SSOP28 254153-001
U304 QUAD 2 CHANNEL MUX, 74LCX157 260377-001
U305 OPAMP, DUAL, SINGLE SUPPLY 256740-001
U306 XMITTER, DIG, CS8405A, SOIC 254163-001
U402 QUAD 2 CHANNEL MUX, 74LCX157 260377-001
U403 CODEC AUDIO, CS4224, SSOP28 254153-001
U404 QUAD 2 CHANNEL MUX, 74LCX157 260377-001
U405 OPAMP, DUAL, SINGLE SUPPLY 256740-001
U406 XMITTER, DIG, CS8405A, SOIC 254163-001
U501 RECEIVER, SPDIF, CS8415A, SOIC 254193-001
U502 QUAD 2 CHANNEL MUX, 74LCX157 260377-001
U503 DAC, 96KHZ, 3-5V, CS4340-KS 256087-001
U504 OPAMP, DUAL, SINGLE SUPPLY 256740-001
U505 QUAD 2 CHANNEL MUX, 74LCX157 260377-001
U601 ENCODER, VIDEO, DIG, CS4955-CQ 256088-001
U602 VIDEO SW, 2-IN, 3-CH, SSOP16 260344-001
U603 DUAL VIDEO AMP, SSOP-8 254181-001
U604 DUAL VIDEOA MP, SSOP-8 254181-001
U701 INVERTER, 5V, 74VCHU04 258464-001
U703 RESET, SOT-23, MAX809, 2.63V 191158-06
U704 IRCODE, KS88C01532, QFP44 (BOS3) 256143-004
U802 VOLT REG, 3.3V, 3.5A, SMPS 193846-001
U803 VOLT REG, 3.3V, 3.5A, SMPS 193846-001
U805 COUNTER, BINARY, 8-BIT 256115-001
U806 VOLT REG, POS, 2.5V, 1.0A, LDO 258495-001
VR1 VOLT REG, POS, 8.0V, SOT-89 258430-W8R0

Description Part Number Note

(01.03.06

)

307513

54

Main PCB 260318-0

Electrical Part List

(Miscellaneous)

Reference

Designator

CR701 RESNTR, CER, W/INTGRTD CAPS, 8

MHZ
FB301 400 OHM, CHIP, 0805 188587-401
FB401 400 OHM, CHIP, 0805 188587-401
FB701 BEAD, FERRITE, CHIP, 1806 256116-181 3

FB702 BEAD, FERRITE, CHIP, 1806 256116-181 3

J1000 CONNECTOR, HEADER, RTANG, EH 256114-04
J101 CONN, HEADER, 30P, TOP-ENTRY, SMT 253356-T30
J102 CONN, HEADER, 10 POS 148591-10
J103 CONN, HEADER, 5 POS 148591-05
J104 CONNECTOR, HEADER, 40 PIN 256105-001
J106 CONN, HEADER, 4 POS 148591-04
J201 CONNECTOR, RCA STACK 256106-001 OR 256106-002
J213 CONN, HEADER, 4 POS 148591-04
J301 CONN, DUAL, DIN, 8 POS 178355
J501 CONNECTOR, OPTICAL, JF J2001 258421-001
J601 CONN, DIN, DUAL, 4 POS, W/FLANGE 256107-002
J701 CONNECTOR, OPTICAL, JF J1000 258420-001
J704 CONNECTOR, JACK, DUAL, STEREO 268897-001
J2000 CONN, JACK, HEAD PHONE, PCB MNT,

9P
J2001 CONNECTOR, HEADER, RTANG, EH 256114-04
L100 22uH, COMMON MODE 187598-220
L2000 100uH, SMT, LEM4532 178370-101
L2001 100uH, SMT, LEM4532 178370-101
L602 1.8uH, CERAMIC 1812, 5% 263452-1R8J
L603 1.8uH, CERAMIC 1812, 5% 263452-1R8J
L604 1.8uH, CERAMIC 1812, 5% 263452-1R8J
L605 10uH, SMT, LEM4532 178370-100
L802 100uH 131297
L804 90 OHM 196676
T301 TRANSFORMER, PULSE 254185-001
T401 TRANSFORMER, PULSE 254185-001
T701 TRANSFORMER, PULSE 254185-001
Y301 CRYSTAL, 11.2896 MHZ, HC49S, SMD 197225
Y700 XTAL, 27MHZ, +/-50PPM, HC-49U 256102-002

Description Part Number Note

191446-8R00

148583

55

Tuner PCB 260322-1

Electrical Part List

(Resistors)

Reference

Designator

R101 1K, 0603, .1W, 5% 199403-102
R102 120 OHM, 0603, .1W, 5% 199403-121
R103 150 OHM, 0603, .1W, 5% 199403-151
R104 100K, 0603, .1W, 5% 199403-104
R105 47K, 0603, .1W, 5% 199403-473
R106 2.32K, 0603, .1W, 1% 191465-2321
R107 499 OHM, 0603, .1W, 1% 191465-4990
R108 3.01K, 0603, .1W, 1% 191465-3011
R109 2.32K, 0603, .1W, 1% 191465-2321
R110 330 OHM, 0603, .1W, 1% 191465-3300
R111 1.18K, 0603, 100MW, 1% 191465-1181
R112 22 OHM, 0603, .1W, 5% 199403-220
R113 4.75K, 0603, .1W, 1% 191465-4751
R114 100 OHM, 0603, .1W, 1% 191465-1000
R115 17.8K, 0603, 0.1W, 1% 191465-1782
R116 51 OHM, 0603, 100mW, 5% 199403-510
R117 2.32K, 0603, .1W, 1% 191465-2321
R118 3.01K, 0603, .1W, 1% 191465-3011
R119 5.1K, 0603, .1W, 5% 199403-512
R120 5.1K, 0603, .1W, 5% 199403-512
R121 51 OHM, 0603, 100mW, 5% 199403-510
R122 13K, 0603, .1W, 1% 191465-1302
R123 17.8K, 0603, .1W, 1% 191465-1782
R124 3.32K, 0603, .1W, 1% 191465-3321
R125 3.32K, 0603, .1W, 1% 191465-3321
R126 2.21K, 0603, .1W, 1% 191465-2211
R127 2.21K, 0603, .1W, 1% 191465-2211
R128 4.75K, 0603, .1W, 1% 191465-4751
R129 5.62K, 0603, 100mW, 1% 191465-5621
R130 5.62K, 0603, 100mW, 1% 191465-5621
R134 10K, 0603, .1W, 5% 199403-103
R135 10K, 0603, .1W, 5% 199403-103
R136 10K, 0603, .1W, 5% 199403-103
R137 51K, 0603, SMD, 100mW 199403-513
R138 51K, 0603, SMD, 100mW 199403-513
R139 1K, 0603, .1W, 5% 199403-102
R140 1K, 0603, .1W, 5% 199403-102
R141 1K, 0603, .1W, 5% 199403-102
R142 10K, 0603, .1W, 5% 199403-103
R145 100 OHM, 0603, .1W, 5% 199403-101
R146 4.75K, 0603, .1W, 1% 191465-4751
R148 20.0K, 0603, .1W, 1% 191465-2002
R149 51 OHM, 0603, 100mW, 5% 199403-510
R150 68.1K, 0603, .1W, 1% 191465-6812
R151 4.75K, 0603, .1W, 1% 191465-4751
R159 3.01K, 0603, .1W, 1% 191465-3011
R161 4.7K, 0603, .1W, 5% 199403-472
R163 4.7K, 0603, .1W, 5% 199403-472
R164 1 OHM, 0805, 1/10W, 5% 133626-1R05
R169 10K, 0603, .1W, 5% 199403-103
R201 4.7K, 0603, .1W, 5% 199403-472
R202 47 OHM, 0603, SMD, 100mW 199403-470
R203 470 OHM, 0603, 0.1W, 5% 199403-471

Description Part Number Note

56

Tuner PCB 260322-1

Electrical Part List

(Resistors continued)

Reference

Designator

R204 430 OHM, 0603, SMD, 100mW 199403-431
R205 1K, 0603, .1W, 5% 199403-102
R206 68.1K, 0603, .1W, 1% 191465-6812
R207 6.81K, 0603, 0.1W, 1% 191465-6811
R208 9.1K, 0603, .1W, 5% 199403-912
R209 10K, 0603, .1W, 5% 199403-103
R210 100K, 0603, .1W, 5% 199403-104
R211 1M, 0603, .1W, 5% 199403-105
R212 4.7K, 0603, .1W, 5% 199403-472
R213 4.7K, 0603, .1W, 5% 199403-472
R214 5.62 OHM, 0603, 100mW, 1% 191465-5R62
R215 10K, 0603, .1W, 5% 199403-103
R216 1.5K, 0603, SMD, 100mW, 5% 199403-152
R217 3.48K, 0603, .1W, 1% 191465-3481
R218 620 OHM, 0603, .1W, 5% 199403-621
R301 33.2K, 0603, .1W, 1% 191465-3322
R302 13K, 0603, .1W, 1% 191465-1302
R304 10K, 0603, .1W, 1% 191465-1002
R305 3.74K, 0603, .1W, 1% 191465-3741
R306 2.21K, 0603, .1W, 1% 191465-2211
R307 3.32K, 0603, .1W, 1% 191465-3321
R308 200K, 0603, .1W, 1% 191465-2003
R309 100K, 0603, .1W, 5% 199403-104
R310 100K, 0603, .1W, 5% 199403-104
R311 3.32K, 0603, .1W, 1% 191465-3321
R312 2.21K, 0603, .1W, 1% 191465-2211
R313 200K, 0603, .1W, 1% 191465-2003
R314 100K, 0603, .1W, 5% 199403-104
R315 100K, 0603, .1W, 5% 199403-104
R316 51K, 0603, SMD, 100mW 199403-513
R317 10K, 0603, .1W, 5% 199403-103
R318 100K, 0603, .1W, 5% 199403-104
R319 1K, 0603, .1W, 5% 199403-102
R320 100K, 0603, .1W, 5% 199403-104
R321 1 OHM, 2010, 1/2W, 5% 187608-1R05
R322 1K, 0603, .1W, 5% 199403-102

Description Part Number Note

(Capacitors)

Reference

Designator

C102 10pF, 0805, COG, 50V, 5% 133622-100
C103 .047uF, 0805, X7R, 50V, 10% 133623-473
C105 .047uF, 0805, X7R, 50V, 10% 133623-473
C106 .047uF, 0805, X7R, 50V, 10% 133623-473
C107 9.1pF, 0603, COG, 50V 188454-9R1
C108 .047uF, 0805, X7R, 50V, 10% 133623-473
C111 2.2uF, EL, 85, 50V, 20% 149947-2R2H
C112 .047uF, 0805, X7R, 50V, 10% 133623-473
C113 .047uF, 0805, X7R, 50V, 10% 133623-473
C114 47uF, EL, 85, 16V, 20% 149947-470C
C115 .047uF, 0805, X7R, 50V, 10% 133623-473

Description Part Number Note

57

Tuner PCB 260322-1

Electrical Part List

(Capacitors continued)

Reference

Designator

C116 .27uF, 1206, X7R, 16V, 10% 181998-274
C117 47uF, EL, 85, 25V, 20% 149947-470E
C118 1.0uF, EL, 85, 50V, 20% 149947-1R0H
C119 180pF, 0805, COG, 50V, 5% 133622-181
C120 1.0uF, EL, 85, 50V, 20% 149947-1R0H
C121 1.0uF, EL, 85, 50V, 20% 149947-1R0H
C122 .47uF, EL, 85, 50V, 20% 149947-R47H
C123 22uF, EL, 85, 25V, 20% 149947-220E
C124 560pF, 0603, X7R, 50V 191470-561
C125 47uF, EL, 85, 25V, 20% 149948-470E
C126 .01uF, 0603, X7R, 50V 191470-103
C127 10uF, EL, 85, 16V, 20% 149947-100C
C128 10uF, EL, 85, 16V, 20% 149947-100C
C129 10uF, EL, 85, 16V, 20% 149947-100C
C130 .047uF, 0805, X7R, 50V, 10% 133623-473
C131 3.3uF, EL, 85, 50V, 20% 149947-3R3H
C132 .047uF, 0805, X7R, 50V, 10% 133623-473
C133 .047uF, 0805, X7R, 50V, 10% 133623-473
C141 100pF, 0603, COG, 50V, 5% 188454-101
C142 33pF, 0603, COG, 50V, 5% 188454-330
C143 1000pF, 0603, X7R, 50V 191470-102
C144 33pF, 0603, COG, 50V, 5% 188454-330
C145 .047uF, 0805, X7R, 50V, 10% 133623-473
C146 .01uF, 0603, X7R, 50V 191470-103
C148 1000pF, 0603, X7R, 50V 191470-102
C149 100uF, EL, 85, 16V, 20% 149947-101C
C150 2.2uF, EL, BP, 85, 50V, 20% 147522-2R2
C151 .047uF, 0603, X7R, 5%, 25V 196999-473
C152 .047uF, 0805, X7R, 50V, 10% 133623-473
C201 68pF, 0603, COG, 50V, 5% 188454-680
C203 .01uF, 0603, X7R, 50V 191470-103
C204 68pF, 0603, COG, 50V, 5% 188454-680
C205 180pF, 0603, COG, 50V 188454-181
C206 .01uF, 0603, X7R, 50V 191470-103
C207 4700pF, 0603, X7R, 50V 191470-472
C208 4700pF, 0603, X7R, 50V 191470-472
C210 39pF, 0603, COG, 50V, 5% 188454-390
C211 1000pF, 0603, X7R, 50V 191470-102
C212 1000pF, 0603, X7R, 50V 191470-102
C213 .47uF, 1206, X7R, 16V, 10% 181998-474
C214 1000pF, 0603, X7R, 50V 191470-102
C216 390pF, 0603, COG, 50V 188454-391
C217 390pF, 0603, COG, 50V 188454-391
C218 33pF, 0603, COG, 50V, 5% 188454-330
C219 6.8pF, 0603, COG, 50V, 5% 188454-6R8
C220 1000pF, 0603, X7R, 50V 191470-102
C221 560pF, 0603, X7R, 50V 191470-561
C222 180pF, 0603, COG, 50V 188454-181
C223 1000pF, 0603, X7R, 50V 191470-102
C224 180pF, 0603, COG, 50V 188454-181
C301 390uF, EL, 85, 20%, 50V 258490-391B25H
C302 .047uF, 0805, X7R, 50V, 10% 133623-473

Description Part Number Note

58

Tuner PCB 260322-1

Electrical Part List

(Capacitors continued)

Reference

Designator

C303 2200pF, 0603, X7R, 50V 191470-222
C304 .047uF, 0805, X7R, 50V, 10% 133623-473
C305 0.10uF, 0603, 16V, 5% 258498-104
C306 0.47uF, 1812, X7R, 50V, 20% 258418-4743
C307 470pF, 0603, X7R, 50V 191470-471
C308 0.47uF, 1812, X7R, 50V, 20% 258418-4743
C310 1000uF, EL, 105, 20%, 25V 258490-102B25E
C312 0.1uF, 0805, X7R, 50V, 10% 133624
C313 10uF, EL, 85, 16V, 20% 149947-100C
C314 .047uF, 0805, X7R, 50V, 10% 133623-473
C315 .047uF, 0805, X7R, 50V, 10% 133623-473
C316 .047uF, 0805, X7R, 50V, 10% 133623-473
C317 .047uF, 0805, X7R, 50V, 10% 133623-473
C319 .33uF, BOX, 85, 50V, 5% 137127-334
C320 330pF, 0603, COG, 50V, 5% 188454-331
C321 1000pF, X7R, 50V, 0603, 5% 260345-102
C322 470pF, 0603, COG, 50V, 5% 188454-471
C323 10uF, EL, 85, 16V, 20% 149947-100C
C324 .022uF, 0603, X7R, 25V 196999-223
C325 0.056uF, 0603, 16V, 5% 258498-563
C326 150pF, 0603, COG, 50V, 5% 188454-151
C327 1800pF, 0603, X7R, 50V, 10% 191470-182
C328 1000pF, X7R, 50V, 0603, 5% 260345-102

Description Part Number Note

(Diodes)

Reference

Designator

D202 SOT, MMBD914LT1 148582
D203 BAV99, SOT23 147239
D301 SCHOTTKY, 40V, 3A, SMB 193847-001
D302 SOT-23, BAV70 147249
D303 SOT-23, BAV70 147249

Description Part Number Note

(Transistors)

Reference

Designator

Q101 PNP, SOT, 47K 146818
Q102 BPLR, N, 25V, 30mA, SOT-23 187601-001
Q103 JFET, N, 20V, 20mA, TO-92 148590-E
Q201 PNP, SOT, 47K 146818
Q202 NPN, SOT, 2SC2814 148781-4
Q203 NPN, SOT, 47K 146817
Q204 PNP, SOT, MMBT3906 148596
Q205 NPN, 1.3W, SOT-223 258416-001
Q206 NPN, SOT, 47K 146817
Q207 NPN, SOT, MMBT3904 146819
Q208 JFET, N, 40V, 10mA, TO-92 147561-3
Q209 NPN, SOT, 47K 146817

Description Part Number Note

59

Tuner PCB 260322-1

Electrical Part List

(Integrated Circuits)

Reference

Description Part Number Note

Designator

U101 AM/FM TUNER, MFP-30S 254561-001
U103 PLL FREQSYNTH, LC72144M 260347-001
U104 DUALCOMPARITOR, SO-8, LM393 148584
U301 VOLT REG, 3.3V, 3.5A, SMPS 193846-001
U302 VOLT, REG, 10V, POS 178352-10
U303 OPAMP, QUAD, NJM3403AM 194024

(Miscellaneous)

Reference

Designator

CF101 FILTER, CER, BAND PASS, FGD 253037-002
CF102 FILTER, CER, BAND PASS, FGD 253037-001
FB1 BEAD, FERRITE, CHIP, 1806 256116-181 3

FM-TNR101 TUNER, FM, 258513-001
J101 CONN, AM ANTENNA, 2.5MM 179266
J102 CONNNECTOR, FM, SHIELDED, US 258434-001
J103 CONN, HEADER, 30P, TOP-ENTRY, SMT 253356-T30
J104 CONN, DC POWER JACK 256763-001 3

J105 CONN, SERIAL 178356
L101 1000uH, AX ON ALR, 40A 260363-102
L201 10uH, SMT, LEM4532 178370-100
L202 100nH, 0603, 5% 191488-101J
L203 1.0uH, SMD, 20% 173273-1R0
L204 220nH, 0805, 5% 191469-221J
L205 1.0uH, SMD, 20% 173273-1R0
L301 100uH 131297
L302 330uH, SMD, 20% 178336-331J
L303 330uH, SMD, 20% 178336-331J
L304 22uH, COMMON MODE 187598-220
RR201 RECEIVER, RF REMOTE, 27.145MHZ 258376-001
RT1 LIMITER, CURRENT, 2.5A 258500-001
SHLD-TNR SHIELD, FENCE 256743
T101 MODULE, TUNING, AM, FRONT END 195359
T102 FILTER, AM-IF, QUINTIPLE TUNED 254114-001
T103 COIL, FM DISCRIMINATOR 254564-001
T104 FILTER, STEREO MPX, SINGLE TUNED 147236
T105 FILTER, STEREO MPX, SINGLE TUNED 147236
Y102 CRYSTAL, QUARTZ, 7.2MHz, 50PPM 147223
Y201 CRYSTAL, 27.145MHZ, FUNDAMENTAL 260353-001

Description Part Number Note

60

Head Unit Packaging Part List

Item

Number

1 PACKING, TOP, EPS 258467 1
2 PACKING, BOTTOM, EPS 258468 1

Packed

with bass

module

REMOTE CONTROL, RC28 256119-001 - -

Description Part Number Qty Note

Note: The AV28 media center is packaged with a powered bass module along with the system

accessories. Refer to the particular system’s powered bass module service manual for further
packaging items. These items will differ depending upon the system, powered bass module, the
AV28 media center is packaged with.

11

2

Figure 4. Console Packaging

61

Laser Current Measurement

Digital Audio

Connector

DIGITAL
OUT

GND

CSEL

SLAVE

MASTER

Mode Select
Headers

ATAPI Interface
Connector

Analog Audio
Connector

GND

R

L

Figure 5. DVD Player Rear Panel

Power Supply
Connector (4P)

GND

+5V

1

+12V

Figure 6. Laser Current Measurement Point

Laser Current Measurement

1. Turn on the media center and insert a disc. Insert a DVD when measuring the DVD laser

current and a CD when measuring the CD laser current.

2. Measure and record the voltage at the points 5V and L5V referenced to the ground shown in
figure 6.

3. Subtract L5V from 5V (5V-L5V) and record the laser voltage (LmV).
LmV/1 Ohm equals laser current (LC).

4. The measured laser current value should be ± 20% of the printed current rating on the pickup
head (PU). PU- .20PU < LC <PU + .20PU. Refer to figure 6 for the location of the laser current
rating. If the value is out of range, and the lens has been cleaned, replace the DVD/CD assembly.

62

Integrated Circuit Diagrams

U1, CS98000, DVD Decoder: Pin Function Table

63

Integrated Circuit Diagrams

Signal Names
A0-A19 Adress Inputs

DQ0-DQ7 Data Inputs/Outputs
DQ8-DQ14 Data Inputs/Outputs
DQ15A-1 Data Input/Output or Address Input
E Chip Enable
G Output Enable
W Write Enable
RP Reset/Block Temporary Unprotect
RB Ready/Busy Output
BYTE Byte/Word Organization Select
VCC Supply Voltage
VSS Ground
NC Not Connected Internally

U2, FLASH, 16M, 3.3V TSSOP, 90NS

U3, SDRAM, 64MBIT, 2MX32, 3.3V

U202, U503, CS4340-KS, DAC, 96 kHz, 3-5V

U201, AUDIO MATRIX, S028

64

Integrated Circuit Diagrams

U204, U305, U405, U504

OP AMP, DUAL, SINGLE SUPPLY

Inputs Output
___
ST
HX XXL
LL LXL
LL HXH
LH XLL
LH XHH
X=Don'tcare

U302, U304, U402, U404, U502, U505 Truth Table

74LCX157, QUAD 2 CHANNEL MUX

SelectABY

U205, OP AMP, DUAL, HI CURRENT

U303, U403, CS4224, CODEC AUDIO, SS0P28

U306, U406 CS8405A, XMITTER, DIG, SOIC

U501, CS8415A, RECEIVER, SPDIF, SOIC

65

Integrated Circuit Diagrams

U601, CS4955-CQ, ENCODER, VIDEO, DIG

U602, VIDEO SW, 2-IN, 3-CH, SSOP16

AO
LH
HL

U701 Truth Table

74VCHU04, INVERTER, 5V

U603, U604, DUAL VIDEO AMP, SSOP-8

U301, U802, U803 VOLT REG, 3.3V, 3.5A. SMPS

66

Integrated Circuit Diagrams

U704, KS88C01532, IR CODE, QFP44 Pin Function Table

67

Changing House Codes

1. Changing the house code settings.

If commands given from a remote conflict with those of another nearby media center, the house
code for the media center can be changed as follows.

1.1 Open the remote control battery cover and locate the miniature switches.

1.2 Change the position of the switches 1, 2, 3, or 4 by moving them in the opposite direction

from their current settings. Use a paper clip, ball point pen, or similar object.

Note: Do not change any other switch settings. Moving other switches may cause the remote to
not control the media center.

1.3 Replace the battery cover.

1.4 Lift the media center door and press the All Off button.

1.5 Press and hold the Store key. The current house code will appear in the media center display

in the form of four rectangles which represent the positions of switches 1 through 4.



HOUSE CODE:

Current house code = 0000
(Switches 1 - 4 down.)

1.6 While holding the Store key, press any key on the remote control. The display will change to
show the new house code confirming recognition of the new code.

HOUSE CODE:

Current house code = 1010
(Switches 1 up, 2 down, 3 up, 4 down.)

1.7 Release the Store key, the system remains off.

1.8 Using the remote, turn the AV28 media center on

and then off. This will complete the process of storing
the new house code.









































1 2 3 4 5 6 7 8 9

House code switches (1 - 4)

Figure 7. House Code Settings

68

Zone 2 Operation

1. Setting up a second listening zone.

The AV28 Media center can direct sound from one or two sources (such as CD, AM/FM tuner,
Tape or Aux) to two different listening zones at the same time.

A compatible Bose®powered speaker system or an existing stereo system (special adaptor
needed) can be connected to the zone 2 speaker connector. Refer to the www.bose.com web
site for compatible speakers.

®

A second Lifestyle
switches on the customer’s existing remote can be changed to control the Zone 2 functions, but
then will have to be changed back to control the Zone 1 functions.

1.1 Open the remote control battery cover and locate the miniature switches.

1.2 Set switches 5 and 6 as shown in the table below.

1.3 Make sure the house code switches match those of the customer’s other remote. If the house

code for the AV28 media center has been set for the customer’s other remote, it is not necessary
to reprogram it to match the second Zone 2 remote control.

system remote control is needed to operate the Zone 2 functions. Or, the

1.4 Replace the battery cover.

1 2 3 4 5 6 7 8 9

Zone code switches (5 - 6)

Controlled Zone 5 6

Zone 1 Down Up
Zone 2 Up Down
Zone1 and 2 Up Up

Figure 8. Zone 2 Remote Control Switch Setting

69

Console-Key Special Function Features

With the system off and powered applied, the following features are active as long as the “Store”
key is held down. Releasing the “Store” key cancels the mode unless otherwise noted.

1. House Code: Pressing “Store” allows you to set the product’s house code for the RF remote.
Refer the “Changing House Codes” section of this manual.

2. Software Revision: Pressing “Store” and “Enter” brings up a new set of information screens.
The first press of “Enter” reveals the software version string. The second press reveals the serial
number. The third and fourth press reveals information about Zone connections. The fifth press
reveals the DVD region code. The sixth press reveals the tuner board type. The seventh press
reveals the UEI IR blaster code revision string. Each subsequent press cycles through these
seven messages.

3. NTC-7 Video Test Pattern: Press “Store” and “Enter” until the software revision is shown. At
this point, pressing “Erase” will toggle the NTC-7 video test pattern on and off. You do not need to
leave your fingers on the buttons to keep generating the pattern.

4. Self Tests: To see the results of the self tests, press “Store” and then toggle “Enter” until the
tuner board type is shown. At this point, while pressing “Store” and “Enter”, toggling “Eject” will
move forward through the list of tests. Each test is shown on the VFD display, and the result or
results are shown on each subsequent press of “Eject.”

70

Revision Driven by Part(s) Effected Page(s)

REV 00 - REV 01 ECN 31418 Changes RCA connector block

From 256106-001 to 256106-002

Effected

55

Lifestyle® Model AV28 Media Center

©2008 Bose Corporation

Service Manual

Part Number 264563

Specifications and Features Subject to Change Without Notice

Bose Corporation
The Mountain
Framingham Massachusetts USA 01701
P/N 264563 REV. 12 010/08 (H)
http://serviceops.bose.com