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Audiolab 8000T - User Manual

Audiolab 8000T
17 pages
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Summary

Audiolab 8000 T Service Manual Overview

System Block Diagram

Block diagram illustrating the main functional units of the Audiolab 8000T FM/AM tuner.

Audiolab 8000 T Circuit Schematics

FM Front End Circuitry

Detailed schematic of the FM front-end receiver, including RF amplification, tuning, and mixing stages.

IF Amplifier and Demodulator

Schematics for the FM Intermediate Frequency (IF) amplifier, filters, limiter, and demodulator circuits.

Stereo Decoder and Muting Circuits

Detailed circuitry for stereo decoding, pilot tone processing, muting control, and audio de-emphasis.

AM Receiver Circuitry

Schematic diagram for the AM receiver section, covering medium and long wave reception.

PLL Frequency Synthesizer

Schematics for the Phase-Locked Loop (PLL) frequency synthesizer and associated loop filters.

Power Supply System Schematics

Circuit diagrams detailing the power supply unit, voltage regulators, and power distribution.

Microprocessor and User Interface

Schematics for the microprocessor control, LCD driver, and front panel keyboard interface.

Audiolab 8000 T Service Notes and Modifications

Signal Strength Meter Troubleshooting

Service bulletin addressing inconsistent signal strength readings caused by a conductive grommet strip.

Serial Number Specific Solutions

Table correlating serial numbers with specific FM front-end issues and recommended solutions.

FM Front End Modification Details

Specific schematic showing the R474 and C710 modification for the FM front-end on certain serial numbers.

Audiolab 8000T Specifications

General IconGeneral
TypeFM/AM Tuner
FM Tuning Range87.5 - 108 MHz
AM Tuning Range522-1611 kHz
Signal to Noise Ratio (AM)50 dB
Total Harmonic Distortion (AM)0.5%
Output Voltage775mV
Power Consumption15 W
Signal to Noise Ratio (FM)75 dB
Total Harmonic Distortion (FM)0.1%
Frequency Response (FM)20 Hz - 15 kHz

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