BOSE ENTERO SE 16 Service Manual

Contents......................................................................................................................................... 1-2

Warranty.............................................................................................................................................3

Safety Information.............................................................................................................................4

Electrostatic Discharge Sensitive (ESDS) Device Handling.......................................................... 4

Specifications, Entero™ SE 16 Audio Processor..................................................................... 5-16

SE 16 audio processor chassis with no modules installed...........................................................5

SE 16 Audio Processor block diagram .........................................................................................6

Software view of an unpopulated SE 16 chassis ........................................................................6

Specifications, Entero Line Level Input module.............................................................................7

Line Level Input module block diagram ........................................................................................7

Software view of Line Level Input module ....................................................................................7

Specifications, Entero Mic/Line Level Input module with Limiter.................................................8

Line Level Input module with Limiter block diagram .....................................................................8

Software view of Line Level Input with Limiter module ................................................................. 8

Specifications, Entero Router Modules...........................................................................................9

2 x 2 Router module...................................................................................................................9

2 x 2 Router module block diagram..............................................................................................9

Entero SE 16 audio processor router slots .................................................................................9

16 x 16 Router module...............................................................................................................9

16 x 16 Router module block diagram..........................................................................................9

16 x 2 Router module...............................................................................................................10

16 x 2 Router module block diagram..........................................................................................10

Software view of 16 x 2 Router module.....................................................................................10

Specifications, Entero SE 16 Equalization....................................................................................11

Fixed EQ Carrier module .........................................................................................................11

Fixed EQ Carrier with 2 submodules block diagram ..................................................................11

Software view of Fixed EQ Carrier module ................................................................................11

5-Band Parametric EQ module................................................................................................12

5-Band Parametric EQ module block diagram ...........................................................................12

Software view of 5-Band Parametric EQ module .......................................................................12

Dynamic EQ module ................................................................................................................13

Dynamic EQ module block diagram ...........................................................................................13

Software view of Dynamic EQ module .......................................................................................13

Specifications, Entero SE 16 4x4 Digital Signal Processing (DSP) Module...............................14

4x4 Digital Signal Processing (DSP) Module .............................................................................14

Software view of the 4x4 Digital Signal Processing (DSP) Module ............................................14

Specifications, Entero SE 16 Output Modules..............................................................................15

Line Level Output module .......................................................................................................15

Line Level Output module block diagram ...................................................................................15

Software view of the Line Level Output module .........................................................................15

Line Level Output module with limiter ...................................................................................16

Line Level Output with Limiter module block diagram ................................................................16

Software view of Line Level Output with Limiter module ............................................................16

Disassembly/Assembly Procedures........................................................................................ 17-21

Entero Module Installation Location Diagrams ...........................................................................17

Entero SE 16 Audio Processor input slots .................................................................................17

Entero SE 16 Audio Processor audio processing slots ..............................................................17

Entero SE 16 Audio Processor router slots...............................................................................17

Entero SE 16 Audio Processor 4x4 DSP installation diagram....................................................17

Entero SE 16 Audio Processor output slots ...............................................................................17

CONTENTS

Test Setup Parameters....................................................................................................................22

Test Procedures ........................................................................................................................ 22-29

GUI showing Entero chassis populated with modules to be tested............................................26

Mic/Line Level Input Module.......................................................................................................26

4x4 DSP - Empty Block Diagram ...............................................................................................27

Line Level Input Module .............................................................................................................27

16x2 Router Module...................................................................................................................27

5-Band Parametric EQ ...............................................................................................................28

Fixed EQs ..................................................................................................................................28

Line Level Output Module ..........................................................................................................28

Line Level Output with Limiter Module ....................................................................................... 29

Part List Notes .................................................................................................................................30

Main Part List, SE16 Audio Processor (see Figure 1) ............................................................ 31-32

Figure 1. SE 16 Chassis Exploded Views ..................................................................................32

Electrical Part Lists ................................................................................................................... 33-99

Power Supply, 80 Watt (P/N: 181269) ....................................................................................... 33-36

Bose® Control Module, BCM-FT (P/N: 198439-000E) ............................................................. 37-38

16x16 Motherboard (P/N: 250590)............................................................................................ 39-48

Accessory Kit (P/N: 195567)...........................................................................................................49

Line Level Input Module (P/N: 250564) .................................................................................... 50-51

Mic Line Input with Limiter Module (P/N: 250585) .................................................................. 52-56

4x4 Digital Signal Processor (DSP) Module (P/N: 250904) .................................................... 57-62

16 x 2 Router Module (P/N: 251030)......................................................................................... 63-64

Line Level Output Module (P/N: 250563-2).............................................................................. 65-67

Line Level Output with Limiter Module (P/N: 250563-1)......................................................... 68-73

Signal Pass-Thru Module (P/N: 250565) ........................................................................................73

16x16 Null Router Module (P/N: 250587) .......................................................................................73

Fixed EQ Carrier Module (P/N: 250570) ................................................................................... 74-76

402® EQ Submodule (P/N: 250569-3) ...................................................................................... 76-77

502®A EQ Submodule (P/N: 250569-2).................................................................................... 78-79

802® EQ Submodule (P/N: 250569-1) ...................................................................................... 80-81

Model 25/32 EQ Submodule (P/N: 250569-6)........................................................................... 82-83

502®B EQ Submodule (P/N: 250569-7).................................................................................... 84-85

AWCS II EQ Submodule (P/N: 250569-9) ................................................................................. 86-87

2x2 Router Module (P/N: 251034)............................................................................................. 88-89

Dynamic EQ Module (P/N: 250568) .......................................................................................... 90-93

5 Band Parametric EQ Module (P/N: 250580).......................................................................... 94-99

CAUTION: The Bose

Entero™ SE 16 Audio Processor

contains no user-serviceable parts.

To prevent warranty infractions, refer servicing

to warranty service centers or factory service.

PROPRIETARY INFORMATION

THIS DOCUMENT CONTAINS PROPRIETARY INFORMATION OF BOSE® CORPORATION WHICH IS BEING FURNISHED ONLY FOR THE PURPOSE OF SERVICING THE IDENTIFIED BOSE PRODUCT BY AN AUTHORIZED BOSE SERVICE CENTER OR OWNER OF THE BOSE PRODUCT, AND SHALL NOT BE REPRODUCED OR USED FOR ANY OTHER PURPOSE.

Warranty

The Bose Entero SE 16 Audio Processor and Modules are

covered by a transferable five-year limited warranty.

SAFETY INFORMATION

1. Parts that have special safety characteristics are identified by the symbol on schemat-

ics 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) 1492 (71). With the unit AC switch first in the ON position and then in OFF position, measure from a known earth ground (metal waterpipe, conduit, etc.) to all exposed metal parts of the unit (antennas, handle bracket, metal cabinet, screwheads, 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 1 and 5.2 Megohms. When there is no return path to the chassis, the reading must be "infinite". If it is not within the limits specified, there is the 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.

SPECIFICATIONS

Entero™ SE 16 Audio Processor

Technical Information

Inputs/Outputs: Up to 16/16

Power Supply:

Operates on universal input power supply with any mains voltage from 80-265VAC, 50-60Hz

Maximum Power Consumption:

240 Watts

Network Input/Output:

LonWorks

8 pin RJ45

Dimensions:

3.5"H x 19"W x 15.5"D, nominal (8.9 cm x 48.3 cm x 39.37 cm) 2 U in a standard full rack

Weight:

9 lb (4 kg) approx., according to number

of modules installed

Features:

• Signal processing for up to 16 channels with 16 inputs and outputs

• Capacity for 4 DSP modules (with 4 in x 4 out for each)

• Supports both analog and digital signal processing technology

• Input compatibility with microphones and line level sources, balanced and unbalanced

• Output compatibility with power amplifers and other line-level equipment

• Internal routing and summing of any sources to any output

• Network control through LonWorks and compatible devices, including amplifiers and video, lighting, and other networked devices

• Assignment of any system control function to any user interface, whether computer-based or not

Chassis rear

Technical Specifications for a Simple Configuration

In a very basic system design, the chassis configuration could include 2 input modules, 2 output modules, and 2 router modules, to produce the following specifications.

Maximum Output: +17dBV

Gain: 0dB nominal

Dynamic Range: 113dB

Harmonic Distortion and Noise:

0.05% nominal, 0.10% limit

Crosstalk at 1kHz: -70dB

Frequency Response:

20Hz to 20kHz referenced at 1kHz, ±1dB

Chassis front

SE 16 audio processor chassis with no

modules installed

SPECIFICATIONS

Entero™ SE 16 Audio Processor (continued)

SE 16 Audio Processor block diagram

Software view of an unpopulated

SE 16 chassis

Safety and EMC Compliance

The Bose® Entero SE 16 audio processor complies with the following safety and other regulatory standards:

Safety Specifications: UL 1950, CSA C22.2 No. 950, EN 60950, CB Scheme per IEC60950 with all country deviations.

EMI/RFI Specifications: FCC Part 15 Subpart B Class A, ICES-003 Class A, AS/NZS 1053, CISPR 22, EN 55103-1, EN 55103-2.

SPECIFICATIONS

Entero™ Line Level Input module

Technical Information

Inputs/Outputs: 2/2 Input Impedance Differential:

20k Ohms, balanced 10k Ohms, unbalanced

Equivalent Input Noise:

–103dBV, A weighted

Gain/Input Range: –60dB to +20dB Input Gain Steps: 1dB THD+N at 1kHz: 0.02%, 0dB gain CMRR at 1kHz: 65dB Crosstalk at 1kHz: –70dB Frequency Response:

20Hz to 20kHz nominal, ±1dB

Size:

2.82"H x 2.24"W

(57.50 mm x 56.25 mm)

Features:

• Handles two channels

• Provides line level differential input stage

• Provides gain control

• Peak detector

• Appropriate for use with all line level sources, such as:

– CD player – video cassette – DAT – Mixing board output

Software view of Line Level Input module

Line Level Input module block diagram

SPECIFICATIONS

Entero™ Mic/Line Level Input module with Limiter

Technical Information

Inputs/Outputs: 2/2

Input Impedance Differential: 20k Ohms

Input Impedance Differential, Phantom Power On: 4k Ohms

Equivalent Input Noise:

–120dBV (60dB gain) –95dBV (0dB gain)

CMRR at 1kHz: 70dB, typical

THD: 0.02%, 1kHz, 50dB gain

Limiter Attack Time: 1mS, 5mS, 10mS

Limiter Release Time: .5S, 1S, 2S

Gain Steps:

0dB, 10dB, 20dB, 30dB, 40dB, 50dB, 60dB

Features:

• Handles two channels

• Provides selectable input stage gain to accommodate a wide range of sources from mic to line-level

• Supplies 12VDC phantom power for condenser microphones

• Provides limiter to ensure consistent output level for a wide range of mic input

• Includes gain control before the limiter

• Provides makeup gain after limiter

• Peak detector

• Appropriate for use with all microphone inputs and for input jacks that accept both mic and line sources

Crosstalk at 1kHz: –70dB

Frequency Response:

20Hz-20kHz nominal, ±1dB limit

Phantom Power: 12VDC

Size:

2.82"H x 2.24"W (70.50 mm x 56.00 mm)

Software view of Line Level Input with

Limiter module

Stereo couple

Line Level Input module with Limiter block diagram

SPECIFICATIONS

Entero™ Router Modules

2 x 2 Router module

Technical Information

Inputs/Outputs: 2/2 Maximum Signal Handling: +17dBV Size: .94"H x 2.25"W

(23.5 mm x 56.25 mm)

Features

• Handles 2 channels

• Includes no active components

• Connects chassis inputs 1 and 2 to the outputs the router serves

• Peak detector

• Appropriate for use when 2 or fewer inputs are used

Note: There is no software view of this module in the GUI. It is a hardware only component and is not controlled by the Entero software.

16 x 16 Router module

Technical Information

Inputs/Outputs: 16/16 Maximum Input/Output: +17dBV Size: 2.80"H x 1.97"W

(70 mm x 24.25 mm)

Features

• No active components

• For use only when the audio processor chassis is configured for 16 independent signal processing channels

• For use alone, in place of other routers*

* CAUTION: Do not use the 16 x 16 router module with any other router. Damage to the module or chassis may result.

Note: There is no software view of this module in the GUI. It is a hardware only component and is not controlled by the Entero software.

2 x 2 Router module block diagram

Entero SE 16 audio processor

Router slots

2 3 4 5 6 7 8

9 10 11 12 13 14 15 16

16 x 16 Router module block diagram

2 3 4 5 6 7 8 9 10 11 12 13 14 15 16

SPECIFICATIONS

Entero™ Router Modules

16 x 2 Router module

Technical Information

Inputs/Outputs: 16/2 Maximum Output: +17dBV at 1 kHz Summing Gain: 0dB, –6dB, –12dB, –18dB THD+N at 1kHz: 0.02% Output Noise:

–95dBV, A weighted, with all switches closed (16 channels summed) –100dBV, A weighted, with 1 switch

closed

Crosstalk at 1kHz: –70dB Frequency Response:

+0/–0.5dB, 20 Hz to 20kHz

Size: 2.80"H x 1.97"W (70 mm x 24.25 mm)

Features:

• Sums from 1 to 16 source signals in any combination

• Provides two independent outputs

• Peak detector

• Appropriate for use with each pair of outputs, unless the 2 x 2 Router module can be used

Software view of 16 x 2 Router module

Note: Entero 16 x 16 and 2 x 2 router

modules have no programmable controls

16 x 2 Router module block diagram

SPECIFICATIONS

Entero™ SE 16 Equalization

Fixed EQ Carrier module

Technical Information

Inputs/Outputs: 2/2 Maximum Output at 1kHz: +17dBV Gain: 0dB nominal (varies with EQ curve) Output Noise: –90dBV, A weighted THD+N at 1kHz: 0.05% Crosstalk at 1kHz: –70dB Frequency Response:

±.5dB, 20Hz to 20kHz with no speaker submodule installed

Size:

2.82"H x 2.24"W (70.5 mm x 56.8 mm)

Features:

• Capacity for two speaker EQ submodules (the same or different, specific to the speakers connected to the outputs it serves)

• Accepts submodules* for:

- 802® II loudspeaker

- 502® A loudspeaker

- 402® loudspeaker

- FreeSpace® 8 flush-mount loudspeaker

- FreeSpace 8 surface-mount loudspeaker

- FreeSpace 25/32 loudspeaker

- 502B loudspeaker

- 502BEX loudspeaker

- AWCS II CannonTM loudspeaker

• Allows use of an EQ submodule on one

channel with unaffected signal pass-

through on the other

• Selectable low pass and high pass

switches, for use with different speakers

• Peak detector

• Suited to the output signal processing

chain

* Submodules must be specified when

ordering

Software view of Fixed EQ Carrier module

Fixed EQ Carrier with 2 submodules block diagram

SPECIFICATIONS

Entero™ SE 16 Equalization

5-Band Parametric EQ module

Technical Information

Inputs/Outputs: 2/2 EQ Bands: 5 fully independent per channel Q adjustment: 0.7 to 7 Frequency response:

Programmable, from 16Hz to 16kHz

Boost or Cut: –15dB to 15dB Maximum Output at 1kHz:

+17dBV full band, flat EQ

Maximum Input at 1kHz: +17dBV Gain: 0dB nominal, ±0.5dB limit with all

bands flat

Output Noise: –95dBV limit with all bands

flat –85dBV limit with typical speaker EQ curve

Crosstalk at 1kHz: –70dBV Accuracy:

±5% nominal center frequency accuracy ±10% nominal Q accuracy

Size:

2.82"H x 2.24"W (70.5 mm x 56.8 mm)

Features:

• 5 fully independent parametric EQ bands for each channel

• Allows each band to be set to any center frequency

• Q adjustment from 0.7 to 6.7

• Frequency adjustment from 16Hz to 16kHz

• Boost or cut from –15dB to 15dB

• Peak detector

Software view of 5-Band Parametric

EQ module

5-Band Parametric EQ module block diagram

SPECIFICATIONS

Entero™ SE 16 Equalization

Dynamic EQ module

Technical Information

Inputs/Outputs: 2/2 Bandpass Filter Response: 55Hz: 55Hz, ±10%;

29dB maximum boost ±2.5dB limit Q=3.5 ±10% 60Hz: 60Hz, ±10%;

27.5dB maximum boost

±2.5dB limit Q=3.6 ±10% 70Hz: 70Hz, ±10%;

24.5dB maximum boost

±2.5dB limit Q=4.4 ±10% 80Hz: 80Hz, ±10%; 22dB maximum boost

±2.5dB limit Q=5.0 ±10% 90Hz: 90Hz, ±10%; 22dB maximum boost

±2.5dB limit Q=5.5 ±10%

Maximum Output at 1 kHz: +17dBV Gain:

0dB nominal, ±1dB limit from 100 Hz to

15kHz. Gain below 100Hz dependent

upon input signal, filter selection, and

calibration

Sensitivity:

100mV (–20dBV) to 3.0V (+10dBV)

required for proper calibration Output Noise: –95dBV, A weighted, RMS

• Bose® proprietary technology to detect the signal level and use it to control the bass boost provided by a frequency bandpass filter

• Ensures a boost for low level (soft) signals and a flat response for high level (loud) signals

• Choice of five boost filters suited to different loudspeakers driven from the dynamic EQ channel

• Stereo coupling option to force tracking of the EQ in both channels of stereo program material

• Adjustable signal sensitivity for setting the signal level threshold. Only signals that fall below that threshold receive a bass boost.

Center Frequency,

Ch. 1 Input

Ch. 2 Input

Stereo Tracking

On/Off

Sensitivity

Dynamic EQ

Filter and VCA

Dynamic EQ

Filter and VCA

Center Frequency,

Sensitivity

Summing

Amplifier

Peak Detection Meter

Summing

Amplifier

Dynamic EQ module block diagram

Ch. 1 Out

Peak 1

Peak 2

Ch. 2 Out

Crosstalk at 1kHz: 70dB Frequency Response:

±0.5dB nominal, +2/–1dB limit for high

level signals, referenced at 1kHz,

0dBV in, over a 20Hz-15kHz range Size: 2.82"H x 2.36"W (70.5 mm x 59.5 mm)

Features:

• Provides a natural balance of high and low frequencies at a wide variety of listening levels

Software view of Dynamic EQ module

SPECIFICATIONS

Entero™ SE 16 4x4 Digital Signal Processing (DSP) Module

Technical Information

Inputs/Outputs: 4/4 Maximum Output: +17dBV Gain: 0dB nominal, +/–0.5dB THD+N:

–80dB (0.01%) max at –1dB fs, 1 kHz –75dB (0.015%) max, 20Hz to 20kHz

Dynamic Range:

92dB typical, 90dB minimum A-weighted

Sampling Rate: 32.55kHz Crosstalk at 1kHz: –70dB Frequency Response:

20Hz to 15kHz, ±.5dB limit

Size: 2.83"H x 5.41"W (71.31mm x 136.33mm)

Features:

• Processes 4 channels

• Occupies 4 slots in the processor chassis

• Up to 4 DSP modules can populate one SE-16 processor chassis

• Capable of performing multiple audio processing functions simultaneously

• Allows the designer to customize the block diagram and select only those functions appropriate to the system design, including:

– Parametric equalization – Speaker equalization

– Multi-way crossovers with separate control of gain, phase, low/high pass filter frequency, type, and order for each channel

– Single and multi-tap delays (delay budget is 800ms per DSP module)

– Routing, level meters, and gain/ attenuation.

– Muting

– Scene construction/recall – Full featured compressors/limiters/ gates that allow for adjustment of the slope, threshold, attack and release times

Software view of the 4x4 Digital Signal

Processing (DSP) Module

4x4 Digital Signal Processing (DSP) Module

SPECIFICATIONS

Entero™ SE 16 Output Modules

Line Level Output module

Technical Information

Inputs/Outputs: 2/2 Maximum Output: +17dBV Output Impedance: 200 Ohms per leg Output Volume Range:

–60dB to +10dB, with mute

THD+N at 1kHZ: 0.1% Output Noise: –95dBV, A weighted Crosstalk at 1kHz: –70dB Frequency Response:

20Hz to 20kHz, ±1dB

Size:

2.30"H x 2.25"W (57.50 mm x 56.25 mm)

Features:

• Handles two channels

• Includes volume control

• Peak detector

Software view of the Line Level Output

module

Line Level Output module block diagram

SPECIFICATIONS

Entero™ SE 16 Output Modules

Line Level Output module with limiter

Technical Information

Inputs/Outputs: 2/2 Maximum Output: +17dBV Output Impedance: 200 Ohms Limiter Threshold Range: –3dB to +17dB Limiter Slope: 10dB:1dB Limiter Attack time: 1mS, 5mS, 120mS Limiter Release Time: .5S, 1S, 2S Maximum Gain: +10dB THD+N at 1kHz: 0.1% with no limiting Output Noise: –95dBV, A weighted Crosstalk at 1kHz: –70dB Frequency Response:

20Hz to 20kHz, ±1dB limit

Size:

2.30"H x 2.25"W (57.50 mm x 56.25 mm)

• Offers user adjustable settings, including: – Volume control – Limit threshold – Attack time – Release time

• Appropriate for all outputs that require a limiter to protect the loudspeakers

Features:

• Handles two channels

• Includes fast-acting limiters

• Provides differential, impedance balanced outputs

• Includes volume control

• Peak detector

Software view of Line Level Output with

Limiter module

Line Level Output with Limiter module block diagram

DISASSEMBLY/ASSEMBLY PROCEDURES

Module Installation Locations

The diagrams below show where the various types of modules available for the Entero installed in the chassis.

Entero SE 16 Audio Processor input slots

SE 16 audio processor should be

Entero SE 16 Audio Processor

router slots

DSP modules

require four audio

processing slots.

These can be either

input or output

processing slots.

Entero SE 16 Audio Processor audio

processing slots

Entero SE 16 Audio Processor 4x4 DSP

installation diagram

Entero SE 16 Audio Processor output slots

DISASSEMBLY/ASSEMBLY PROCEDURES

Note: Refer to Figure 1 on page 32 for the

following procedures.

1. Top Cover Removal

1.1 Remove the seven screws that secure

the top cover (1) to the chassis (13).

1.2 Lift the rear of the top cover and slide the cover to the rear of the chassis.

1.3 Lift off the top cover.

2. Top Cover Replacement

2.1 Align the top cover (1) with the chassis

(13).

2.2 Slide the front of the top cover under the lip on the front of the chassis.

2.3 Secure the top cover to the chassis using the seven screws removed in step

1.1.

3. Power Supply Removal

3.1 Perform procedure 1.

3.2 Unplug the the two cables from the

power supply (2) at J1 and J2. Note: These cables can be difficult to remove. Be careful not to damage the power supply board.

3.3 Remove the four screws that secure the power supply to the chassis (13).

4.2 Align the power supply with the studs located in the bottom of the chassis (13).

4.3 Secure the power supply to the chassis using the four screws and one 5/16” locknut removed in steps 3.3 and 3.4.

5. Bose® Control Module Removal

5.1 Perform procedure 1.

5.2 Remove the three 5/16” locknuts that

secure the Bose control module (10) to the motherboard (11).

5.3 Lift the Bose control module straight up until it is clear of the connectors. Be careful not to bend the pins on the connectors.

6. Bose Control Module Replacement

6.1 Align the connectors on the Bose

control module (10) with those on the motherboard (11). Note: The connectors are different sizes. The module will fit only one way.

6.2 Gently press the Bose control module down until it is fully seated in the motherboard connectors.

6.3 Secure the Bose control module to the motherboard using the three 5/16” locknuts removed in step 5.2. Do not overtighten.

7. Input or Output Module Removal

3.4 Remove the one 5/16” locknut that

secures the power supply bracket (9) to the chassis.

3.5 Lift the power supply out of the chassis.

4. Power Supply Replacement

4.1 Be sure the power supply bracket (9) is

properly aligned and attached to the heat sink on the power supply (2) using two screws.

7.1 Perform procedure 1.

7.2 Remove one screw located at the rear

of the chassis (13) which secures the module in the chassis.

7.3 Using a gentle rocking motion, lift the module off of the motherboard (11) connectors and chassis.

DISASSEMBLY/ASSEMBLY PROCEDURES

8. Input or Output Module Replacement

8.1 Align the module connectors with

the corresponding connectors on the motherboard (11). Note: Input and Output modules are installed in different locations on the motherboard. Incorrect module placement may damage the module and/or the motherboard. Refer to the silkscreen on the rear of the chassis (13).

8.2 With the connectors properly aligned, press the module in place until it is fully seated in the motherboard connectors.

8.3 Secure the module in place using the screw removed in step 7.2.

9. 4x4 DSP Module Removal

Note: The 4x4 DSP module processes

audio for four motherboard channels at once. As a result, it’s installed differently than an audio processing module. It’s used in conjunction with a Null module and the DSP Sidecar PCB, which uses an 8 conductor ribbon cable to connect the audio from the DSP PCB to the other two channels on the motherboard.

10. 4x4 DSP Module Replacement

Note: The 4x4 DSP module processes

10.1 Align the 4x4 DSP module with the corresponding motherboard connectors.

10.2 Gently press the 4x4 DSP module into the motherboard connectors until it is fully seated.

10.3 Install the DSP Sidecar PCB into the motherboard connector for the two adjacent channels. This is the small 8 pin connector located below and just to the right of the E1 connector on component side of the installed 4x4 DSP module. Make sure it is fully seated into the motherboard connector. Connect the other end of the ribbon cable to the E1 connector on the 4x4 DSP module. This cable should extend straight to the left to connect to E1.

9.1 Disconnect the DSP Sidecar PCB cable from the E1 connector on the top-left of the DSP PCB. Unplug the DSP Sidecar PCB from the motherboard (11) connector.

9.2 Grasp the DSP PCB at the corners and using a gentle rocking motion, pull the DSP PCB out of the motherboard connectors.

9.3 Remove the associated Null module using a gentle rocking motion. This would be the Null module installed in the 8 pin motherboard connector located near the bottom right corner of the installed 4x4 DSP module.

10.4 Install a Null module in the other 8 pin motherboard connector located near the bottom right corner of the component side of the installed 4x4 DSP module. This Null module is needed to jumper the audio information across this connector. Without this module installed, you will have no audio output on these two channels.

10.5 Verify that the 4x4 DSP module, the DSP Sidecar PCB and the required Null module are properly installed. For example, if the 4x4 DSP module were installed in motherboard connectors J108, J208, J116 and J216, then the DSP Sidecar PCB would be installed into J209 and the Null module would be installed into J217.

DISASSEMBLY/ASSEMBLY PROCEDURES

11. Router Module Removal

11.1 Perform procedure 1.

11.2 Grasp the corners of the Router

module. Using a gentle rocking motion, lift up on the Router module until it is clear of the motherboard connectors.

12. Router Module Replacement

12.1 Align the Router module with the

corresponding connectors on the motherboard (11). Note: The Router modules must be installed into the correct connectors on the motherboard. These connectors are located in the center of the motherboard near J1. Only the Router modules will fit into these connectors.

12.2 Gently press the Router module straight down into the motherboard connectors until it is fully seated.

13. Motherboard Removal

13.6 Using a 5/16” nutdriver, remove the

three locknuts that secure the Bose control Module (10) to the motherboard. Lift the Bose control module straight up to remove it from the motherboard connectors.

13.7 Using a 1/4” nutdriver, remove the three standoffs located under the Bose control module. These standoffs must be removed to remove the motherboard.

13.8 Lift up on the motherboard, starting at the edge of the motherboard nearest the power supply (2).

13.9 Slide the motherboard up and out toward the front panel of the chassis until the D52 and D53 LEDs and RJ45 network connectors have cleared the chassis.

14. Motherboard Replacement

14.1 Align the the motherboard (11) D52

and D53 LEDs and RJ45 network connectors with the corresponding openings in the chassis (13).

13.1 Perform procedure 1.

13.2 Remove all of the Input, Output,

4x4 DSP, Router and audio processing modules using the disassembly/assembly procedures located in this section.

13.3 Unplug the power supply to motherboard cable harness (4) at J1. Note: Use caution when removing this connector.

13.4 Using a small flat-head screwdriver, disconnect the red, green and black wires that run from the front panel LED harness assembly (8) to the motherboard (11) at J6.

13.5 Using a phillips-head screwdriver, remove the fifteen screws that secure the motherboard (11) into the chassis (13).

14.2 Slide the motherboard into the chassis, aligning it with the chassis screw studs. Make sure that the RJ45 network connectors and LEDs D52 and D53 protrude through their openings in the rear of the chassis.

14.3 Secure the motherboard to the chassis using the fifteen screws removed in step 13.5.

14.4 Using a 1/4” nutdriver, install the three standoffs removed in step 13.7

14.5 Reinstall the Bose control module (10) into its connectors on the motherboard. Be careful not to bend the pins on the connectors.

14.6 Using a 5/16” nutdriver, secure the Bose control module to the chassis using the three locknuts removed in step 13.6

DISASSEMBLY/ASSEMBLY PROCEDURES

14.7 Re-connect the power supply to

motherboard cable harness (4) from the power supply (2) to motherboard connector at J1.

14.8 Using a small flat-blade screwdriver, re-connect the Front Panel LED harness (8) wires to motherboard connector J6. Be sure that the green, red and black wires are installed in the correct locations, and that there are no strands of wire shorting across to the other wires.

14.9 Reinstall the Input, Output, Router, 4x4 DSP, Null Module and audio processing Modules using the disassembly/assembly procedures located earlier in this section.

15. Fan Removal

15.1 Perform procedure 3.

16.4 Observing polarity, solder the wires

from the power supply harness and the new fan together. Insulate the connections using heat shrink tubing.

16.5 Perform procedure 4.

15.2 With the chassis disconnected from

AC mains, cut the red and black wires that run from the power supply (2) connector at J2 to the fan (12).

15.3 Remove the four locknuts that secure the fan to the chassis (13). Slide the fan off of the chassis studs.

16. Fan Replacement

16.1 Slide the fan (12) over the four chassis

studs. Be sure to face the fan in the same direction as the original for correct airflow.

16.2 Secure the fan to the chassis (13) using the four locknuts removed in step

15.4. Do not overtighten them or you will crack the fan housing.

16.3 Strip the red and black wires from the power supply (2) harness at J2 and the wires from the new fan.

TEST PROCEDURES

Test Setup Parameters

In order to perform these tests, you will need the following:

• A Microsoft computer with at least 40Mbytes of hard disk space, 32Mbytes of RAM and a CD ROM drive.

• Bose Owner’s Guide.

• Windows 95 or Windows NT 4.0.

• Network Interface Card, such as the Echelon® PCNSI for desktops or the PCC-10 for laptops.

• An Entero SE 16 audio processor chassis to be used as a test-bed.

• A length of CAT-5 network cable long enough to reach from the network card in your PC to your Entero chassis.

1. Verify that the Entero software is properly installed and operating on the computer that you will be using for these tests. If the software is not installed, refer to the Entero Designer Software User’s Guide.

2. Verify that the Echelon Network Interface Card is installed and working properly.

3. Connect the CAT-5 cable from your PC to the Entero SE 16 audio processor chassis under test.

1. Power Up Test

1.1 Remove the top cover using disassem-

bly/assembly procedure 1.

Windows® compatible

Entero™ software (CD ROM) and

1.4 Turn on the power switch on the front panel of the SE 16 audio processor.

1.5 Turn on the Variac and slowly increase the AC mains voltage to the proper level while observing the SE 16 audio processor for problems.

1.6 The front panel LED may illuminate if the neuron module has been previously configured, otherwise it remains off.

1.7 Verify that the fan is operating and drawing air into the front of the chassis.

1.8 Using a Voltmeter, check the AC and DC voltages at the power supply in accordance with the following table.

Pin Voltage

J1 (AC Input)

PIN 1 AC GROUND PIN 2 AC NEUTRAL PIN 3 AC LINE

J2 (DC Output)

PIN 1 +5V (+/-2%) PIN 2 +5V (+/-2%) PIN 3 +5V (NOT USED) PIN 4 RETURN PIN 5 RETURN PIN 6 RETURN PIN 7 RETURN PIN 8 +15V (+/-3%) PIN 9 +15V (NOT USED) PIN 10 -15V RETURN PIN 11 -15V (+/-3%) PIN 12 KEY PIN 13 +24V (+10%/-5%)

1.2 Using an Ohmmeter, verify that the fuses are good. Also make sure they are the correct value in accordance with the part list in the back of this manual.

1.3 Connect an AC mains cable to the unit under test. Connect the other end of the AC mains cable to a Variac. Caution: Use care when working inside the chassis with AC mains power applied.

Note: If any of the DC voltages in the table are low, remove AC mains power and unplug J1 on the motherboard. Re-apply AC mains power to the chassis and recheck the DC voltage levels at J2 of the power supply. If the DC voltage is now at the correct level, then the problem is on the motherboard.

TEST PROCEDURES

1.9 Measure the motherboard DC voltages

at motherboard connectors J100-J147 in accordance with the following table. All measurements are referenced to pin 10 of the connector you are testing. Refer to the motherboard schematic diagram for more information. Note: Be careful not to short across pins during these tests.

Connector Pin # DC Voltage

PIN 5 +5V (+/-.05V%) PIN 6 +15V (+/-.1V%) PIN 7 +5V (+/-.05V%) PIN 8 -5V (+/-.05V%) PIN 9 -15V (+/-.1V%)

1.10 Measure the motherboard DC voltages at motherboard connectors J348-J355 in accordance with the following table. All measurements are referenced to pin 10 of the connector you are testing. Refer to the motherboard schematic diagram for more information. Note: Be careful not to short across pins during these tests.

2.1 Verify that the modules are properly installed in the desired test configuration. If you are testing a failed chassis you would configure the modules as they were when the chassis failed.

2.2 Apply AC mains voltage to the chassis under test. Turn the front panel power switch ON.

2.3 In the Microsoft

Windows® operating

system, click START, and select the icon to

open the Entero

Designer software. Using the Entero Graphical User Interface (GUI), add the device (SE 16 chassis) to the GUI. When the GUI window opens, click on the DEVICE FINDER tab at the bottom of the window as shown below.

Connector Pin # DC Voltage

PIN 5 +5VD (+/-.05V%) PIN 9 +15V (+/-.1V%) PIN 10 +5VA (+/-.05V%) PIN 11 -5VA (+/-.05V%) PIN 12 -15V (+/-.1V%)

2. Module Discovery Tests

Note: These tests verify most of the

circuitry on the motherboard. They do not test every IC 100%. The following circuits will be exercised during these tests.

• Neuron module with Flash memory

• RJ45 connectors and EMI filtering

• Oscillator and divider circuitry

• PLDs U54 and U55

• Clock, Data, Enable and Channel Select signals

• Module ID Mux chain

• Peak detect Mux chain

• A/D Converter and Dump circuit

• Service Pin and drive circuitry

• LEDs and drive circuitry

The view will change to the device view. At the top of the GUI window, click on the TOOLS pull-down menu. Select ADD DEVICE as shown below.

TEST PROCEDURES

When the box opens, open the PROCESSING folder,

and click on the file named Bose SE16.dev. Click OPEN.

Click on the icon once to highlight it, and click on the TOOLS list at the top of the GUI window. In the pull-down menu, select ATTACH.

The dialog box shown below will open.

You will see a triangular icon with an “X” through it appear in the white left-hand column.

Select the “Service Pin” option in the dialog box. Press the service pin on the rear of the SE 16 chassis. Ensure that the yellow “service” LED on the rear panel of the chassis illuminates when you press the service pin. You will get the dialog shown below.

TEST PROCEDURES

2.4 When this dialog box opens, click on

the “Configure for Hardware Modules” option. Verify that the green LED on the chassis rear panel illuminates during this procedure. The front panel LED should now be a solid green.

2.5 You should now see a gray block with 56 sections in the gray right-hand column with icons for the various installed modules in them. The “X” through the icon for the SE16 processor should be gone. See the example below.

Using the Entero GUI, verify that all of the modules installed in the chassis were discovered correctly by the GUI. As you click on each one of the icons in the gray block. The controls for that module should appear to the right of the gray block. Make sure that the correct controls for the module appear. See the photos on the following pages for examples. If the module is not correctly discovered, replace it with a known good one and repeat these tests.

3. Automatic Clock Switching Tests

Note: These tests verify the functionality

of the DSP clock routing to J108-J115 and J132-J139. The following circuits will be exercised during these tests.

• DSP module ID Detectors

• DSP Clock MUXing

3.1 With no DSP modules installed, apply AC mains power to the EnteroTM chassis under test. Place the front panel power switch to the ON position.

3.2 Configure the chassis in the Entero GUI for the installed modules using the Module Discovery tests in this section. Verify that the modules were correctly discovered.

3.3 Using a frequency counter or oscilloscope, verify that there is no 10 MHz clock signal present at pin 4 of the input signal processing connectors at J108, J110, J112, J114 and the output signal processing connectors at J132, J134, J136 and J138 of the motherboard.

3.4 Place the chassis front panel switch to the OFF position. Install a DSP module into the input or output signal processing connectors that you want to test. For example, lets install the DSP module into J108, J208, J116, J216, J209 and J217. In this case the DSP sidecar module used with the DSP module would install into J209 and the other end of the ribbon cable plugs into E1 on the DSP card. A signal pass-thru or null module would normally be installed in J217 as well to pass the audio for that channel to the rest of the motherboard. Place the front panel power switch to the ON position.

3.5 Configure the chassis in the Entero GUI for the installed modules using the Module Discovery tests in this section. Verify that the DSP module was correctly discovered.

3.6 Using a frequency counter or oscilloscope, verify that the 10 MHz clock signal now appears on the DSP at J1 pin 4 of the DSP board.

3.7 Repeat these tests for the rest of the connectors you want to test as listed in step 3.3. For example, the next connector for test would be J110. Install the DSP module and configure the chassis. Using a frequency counter, verify that there is now a 10 MHz signal at J110 pin 4.

TEST PROCEDURES

4. Signal Path Tests

4.1 Populate the chassis with modules in

the same configuration as when the module or chassis failed (see the example in the diagram below). In this way you should be able to determine whether or not you have a failed module or a failed channel on the motherboard. Note: In order to pass an audio signal through the chassis you will need an Input module, Output module, Router and Null modules. The Null modules (also referred to as Signal Pass-Thru modules) are used to jumper the audio signal through the unused audio connectors on the motherboard. Without these modules in place, you will not pass audio through the chassis on that motherboard channel.

4.2 Once the chassis is configured physically, you will need to configure the modules in the EnteroTM GUI as shown in the following examples. You will set up only the modules that are actually used in the signal path of the chassis channel you want to test.

Mic/Line Level Input Module

Set the GUI controls for this module as shown in the above figure.

1. Input Gain 1 and 2: 0 dB

2. Attack 1 and 2: 1 mS

3. Release 1 and 2: 500 mS

4. Threshold 1 and 2 slider: +17 dB

5. Output Gain 1 and 2 slider: 0 dB

6. Phantom Power 1 and 2: unchecked

7. Mute 1 and 2: unchecked

GUI showing Entero chassis populated with modules to be tested

TEST PROCEDURES

Line Level Input Module

Set the GUI controls for this module as shown in the above figure.

1. Output Gain sliders for both channels: 0 dB

2. Channel Couple: unchecked

3. Mute for both channels: unchecked

16x2 Router Module

Set the GUI controls for this module as shown in the above figure.

1. Channel 1 input to channel 1 output

2. Channel 2 input to channel 2 output

3. Channels 1 and 2 NOT summed Note: Channel 1 and 2 shown above, setup also applies to channels 3 through 8.

4x4 DSP - Empty Block Diagram (Note: 0 dBV on analog meter = -17 dBFS on DSP meter)

TEST PROCEDURES

5-Band Parametric EQ (configure for flat frequency response)

Fixed EQs (measured at 700 Hz)

Set the GUI controls for this module as shown in the above figure.

1. Low Pass Filter (LPF) channel 1 and 2: Default

2. High Pass Filter (HPF) channel 1 and 2: Full Range

Line Level Output Module

Set the GUI controls for this module as shown in the above figure.

1. Channel 1 and 2 Gain Sliders: 0 dB

2. Channel 1 and 2 Couple button: unchecked

3. Channel 1 and 2 Mute buttons: unchecked

TEST PROCEDURES

Line Level Output with Limiter Module

Signal Path Tests (continued)

4.3 Apply a 0 dBV (1 Vrms), 1 kHz signal to

the channel 1 and 2 inputs located on the Input Module.

4.4 Using the GUI, check the signal levels on the module meters. Verify that the 0 dBV sine wave is passing through each module in the chassis. If the sine wave goes into a card, but not out, check the settings for that module and ensure that it is set up correctly.

4.5 If the module settings are correct, and audio is still not flowing out of a module, then swap out the module with a known good module, if available, to verify that the module under test has failed.

Set the GUI controls for this module as shown in the previous figure.

1. Attack 1 and 2: 1 mS

2. Release 1 and 2: 500 mS

3. Channel 1 and 2 Gain sliders: 0 dB

4. Channel 1 and 2 Threshold: +17 dB

5. Channel 1 and 2 Couple: unchecked

6. Channel 1 and 2 Mute buttons: unchecked.

4.6 If you have audio coming out of both channels, but it is distorted, then:

4.6.1 Verify that the signal applied to the input modules is not distorted.

4.6.2 Check the meters on the various modules to be sure that the signal is not being overloaded by too high gain. Verify setup of the modules using the

setup diagrams on the previous pages

of this section.

4.7 If the audio output is still distorted, sequentially replace the modules with known good modules until the distortion is eliminated. Return the defective module for replacement.

PART LIST NOTES

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

Manager is required before ordering.

2. The individual parts located on the PCBs are listed in the Electrical Part List.

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

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

4. The 80 Watt Power Supply, Bose manufactured by:

Artesyn Technologies 125 Newbury Street Framingham, Ma. 01701 (508) 628-5600 888-283-3122 http://www.artesyn.com

part number 181269, is a purchase for resale item that is

The part numbers listed in the part list for the 80 Watt Power Supply are the part numbers used by Artesyn Technologies, and are provided for informational purposes. If you have a defective power supply in your Entero

SE 16 chassis, it is recommended that you purchase a replacement power supply from Bose Corporation. If the power supply is no longer available, then you may need to repair your defective unit using the information supplied in this manual.

+ 71 hidden pages