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Procedure to measure leakage current with unit reassembled.
Procedure to measure insulation resistance of exposed parts.
Recommended precautions for repairing, replacing, or transporting ESDS devices.
Overview of the Series II bass module's capabilities and exceptions.
Goals for market opportunity, audio performance, and design.
Module features a two-chamber design with two exit ports.
Bass box accepts AC-3 (Dolby Digital) and PCM bit streams.
Adjusting center and surround speaker levels for preference and placement.
Dimensions, weight, enclosure, and colors of the bass module.
Details AC mains and speaker output connectors.
Tolerances for power mains and ambient temperature.
Groups of commands for system functions.
Controls for raising and lowering system volume.
Controls for adjusting surround channel volume.
Controls for muting and unmuting audio output.
DRC turn-on/off behavior based on source transitions.
Four available speaker modes for output configuration.
How to select 2, 3, or 5-channel modes.
Conditions for automatic engagement of 1-to-5 channel mode.
Automatic and manual engagement of film EQ.
Film EQ behavior for AM, FM, and CD sources.
Film EQ behavior for TAPE source.
Film EQ behavior for VID TV source.
Film EQ behavior based on DVD signal type.
Application of film EQ boost/cut for non-AC3 sources.
Film EQ curves for AC-3 sources with LFE.
Variables related to program dynamics.
How bass module uses dynamic range data.
Variables for two-independent-channel mode.
Target curves for room response.
Speaker EQ curves for analog and digital inputs.
Curves for dynamic EQ at 10 dB steps.
Curves for bass and treble tone controls.
Bass control response curves.
Treble control response curves.
Description of dynamic range compression.
Input-output map for limiter.
Steady-state compression behavior.
Bass limiter behavior.
Satellite clip limiter dynamic behavior.
Volume level dependent dynamic EQ with frequency bumps.
Controls for bass and high frequency.
Compensates for playback environment spectral differences.
Dynamic range compressor for program material.
How DRC reduces dynamic range and its mathematical expression.
Digital volume control implementation.
Reduces signal levels to conform to output range.
Post limiter gains to prevent amplifier clipping.
Format of serial data commands for DBB.
Command to raise system volume.
Command to raise surround channel volume.
Command to raise center channel volume.
Command to lower center channel volume.
Sets DBB for stereo operation.
Sets DBB for stereo + center operation.
Specifications for output power under various conditions.
Distortion specifications for bass and satellite channels.
Input impedance for SPDIF signals.
Input sensitivity for analog audio signals.
Common Mode Rejection Ratio for analog inputs.
Details of the bass module's physical characteristics.
Details of the 13-pin DIN audio input connector.
Acoustic specs for bass module and satellites.
Quality plan and field failure rates.
Product packaging requirements.
Product must meet safety and regulatory requirements.
Product variants determined by AC line voltage.
Flow chart detailing audio source switching logic.
Audio coding algorithm 3.
Perceptual coding and data compression algorithm.
Short for five wide band audio channels.
Optical fiber connector for SPDIF data.
Matrix-decoding algorithms for surround information.
PCB assembly consists of two DSP PCBs on a pallet.
PCB accepts analog and digital bitstream inputs.
Manages serial data interface and DSP system.
Integrates input ADCs, SPDIF receiver, and output DACs.
Performs all signal processing functions.
Lists commands for product functions and testing.
Signal names, pinouts, voltage, and current for power.
Serial data input/output protocols and levels.
Notes on output impedance and full-scale output.
Notes on connecting grounds and waiting for transients.
Formatting for commands and responses.
Mandatory in-circuit testing at component level.
Prevents voltage exceeding nominal output by 10%.
Apply DC power and measure 5V supply regulation.
Apply DC power and measure 3.3V supply regulation.
Command to clear EEPROM and expected response.
Command to reset microcontroller and initialize EEPROM.
Command to initialize EEPROM checksum.
Testing limits depend on microcontroller/DSP code revision.
Command to check microcontroller and DSP code revisions.
Verify code revision and checksum.
Perform DSP checksum test for specific revisions.
Measure DC offset at analog outputs.
Measure DC offset for L output.
Measure DC offset for C output.
Measure DC offset for R output.
Command for loopback test.
Parsing output string for signal measurements.
Measurement of B channel distortion.
Measurement of B channel signal strength.
Measurement of LS channel distortion.
Measurement of LS channel signal strength.
Measurement of SPDIF L channel distortion.
Measurement of SPDIF L channel signal strength.
Measuring mute output status.
CRC check of EEPROM parameters failed.
Attempt to re-initialize corrupt EEPROM header failed.
Successful EEPROM initialization.
Explanation of hex notation and sign bit.
PCB assembly is a combination of two amplifier boards.
Cobalt amplifier is similar to AM-25P amplifier.
Transformer specifications for powering the PCB assembly.
AC mains supply requirements and current limiting.
AC mains voltage requirement.
AC mains frequency requirement.
Maximum inrush current specification.
Mandatory in-circuit testing at component level.
Power-up sequence and verification.
Confirm no DC offset exists at audio outputs.
Measure bass channel gain at specific frequencies.
Measure bass channel output noise.
Measure amplifier output gain at specific frequencies.
Measure amplifier output gain at 100Hz.
Measure amplifier output gain at 15KHz.
Measure A-weighted output noise.
Measure THD+N at 0.5W output.
Measure THD+N at 0.5W output.
Steps for powering off and discharging supplies.
Exploded isometric view from the rear.
Wire management cover is consumer removable.
Repair information for Concertos Acoustimass Bassmodul.
Details on product delivery options.
Repair procedures for specific modules.
PCB assembly is a combination of two amplifier boards.
Cobalt amplifier is similar to AM-25P amplifier.
Transformer specifications for powering the PCB assembly.
AC mains supply requirements and current limiting.
AC mains voltage requirement.
AC mains frequency requirement.
Maximum inrush current specification.
Mandatory in-circuit testing at component level.
Power-up sequence and verification.
Confirm no DC offset exists at audio outputs.
Measure bass channel gain at specific frequencies.
Measure bass channel output noise.
Measure amplifier output gain at specific frequencies.
Measure amplifier output gain at 100Hz.
Measure amplifier output gain at 15KHz.
Measure A-weighted output noise.
Measure THD+N at 0.5W output.
Measure THD+N at 0.5W output.
Steps for powering off and discharging supplies.
Pin connections and function for TDA7294.
Pin connections and logic diagram for Octal Buffers.
Logic diagram for Quad Nand gate.
Pinout and connections for EPROM.
Pin assignment and function table for Codec.
Quad Op-Amp pinout and description.
Pinout for TMP87PH47U microcontroller.
Voltage comparator circuit diagram.
Pin descriptions for DSP 1 and 2.
8-pin Mini-DIN to Mini-DIN cable.
Cinch-Cinch cable.
Scart cable for connecting TV.
Connections for the Masterunit.
Subwoofer connections and SAP numbers.
Satellite connections and SAP numbers.
Cable for TV OUT L/R.
Cable for data and control signals.
Cable for surround audio input.
Subwoofer connections.
Satellite connections.
List of spare parts for Concertos Acoustimass Modul.
List of packing materials.
List of connecting cables.
List of integrated circuits with part numbers.
List of sockets used in the assembly.
List of transistors with part numbers.
List of transistors with part numbers.
List of diodes with part numbers.
List of diodes with part numbers.
List of capacitors.
List of resistors.
List of resistors.
List of resistors.
List of Loewe service establishments in Germany.
Loewe service contact for Benelux.
Loewe service contact for Netherlands.
Loewe service contact for Denmark.
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