Bang & Olufsen Beocenter 2500

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Summary

1-2 Technical Specifications

1-11 FM Tuner

2-1 Diagram A FM;AM, RF, IF Decoder

2-2 Diagram B FM;AM, RF, IF Decoder

2-3 Diagram C Power Supply and Pre Amp

2-4 Diagram D Power Supply, Tape Data Control

2-5 Diagram E Tape AF and Control

2-6 Diagram F Dolby NR and Tape Type Logic

2-7 Diagram G RAM F Microcomputer

2-8 Diagram G Display and Keyboard

2-9 Diagram H IR Transceiver and Door Sensors

2-10 Diagram I CD Servo Motor System and Disc Detector

2-11 Diagram J CD Decoder

2-12 Diagram K Light and Motor Control

2-13 Diagram L Radio Data System

2-14 Diagram M Beolab 2500 Active Crossover Network and Power Amplifier

2-17 PCB Diagrams

PCB 4, IR Transceiver and left door sensor

Diagram of PCB 4, IR transceiver and left door sensor.

PCB 10, RDS-kit

PCB 22, Beolab 2500

2-19 CD Diagrams

Diagram K CD, Light and motor control

Diagram K for CD light and motor control.

PCB 20, Disc detector

2-20 Block Diagram System Control

2-21 Block Diagram Tuner

2-22 Block Diagram Tape

2-23 Block Diagram CD

2-24 Block Diagram Beolab 2500

3-1 List of Electrical Parts

3-3 List of Electrical Parts

3-5 List of Electrical Parts

3-6 List of Electrical Parts

3-7 List of Electrical Parts

3-8 List of Electrical Parts

3-10 List of Electrical Parts

3-12 List of Electrical Parts

3-12 List of Mechanical Parts

5-1 Adjustments

HF Adjustments

Adjustments for RF and IF stages.

FM Adjustments

Adjustments for FM tuning and IF.

AM Adjustment

Adjustments for AM tuning.

5-3 Adjustments

Channel Separation

Adjusting channel separation for FM.

FM Stop Level

5-5 Electrical Adjustments

Tape Recording Adjustments

Adjustments for tape recording, playback level, and bias.

5-7 Test Mode Adjustments

Tape Adjustments

Adjusting tape bias, recording level, and recording current.

Tone Generator Adjustment

5-9 Electrical Adjustments

CD Servo Control

Adjusting CD servo control.

Laser Power

Adjusting laser power.

5-11 Laser Adjustments

Checking the Laser Supply

Beolab 2500 Measurements

7-1 Repair Tips - CD Mechanism

Removal of Gearboxes for CD Clamps

Repair of CD Transport Mechanism

7-2 Repair Tips - Tape Deck

5-6 Playback Level

5-8 Test Mode Adjustments

Tape Bias and Recording Adjustments

Adjusting FM bias, MP bias, and recording current.

Tone Generator and Level Adjustments

8-8 Test Procedures

Laser (Laser Out)

LM (Laser Monitor)

FE (Focus Error)

10-1 Diagram A FM;AM, RF, IF Decoder

10-2 Diagram F Microcomputer

10-3 Diagram G Display and Keyboard

10-3 a Diagram G Display and Keyboard Version E

10-4 PCB Diagrams

PCB 1, Tuner and IF System

PCB 3, Microcomputer

Diagram of PCB 3, Microcomputer.

PCB 5, Display

Diagram of PCB 5, Display.

14-1 Diagram G Display and Keyboard

14-2 Diagram K Light and Motor Control Version G

List of Electrical Parts

15-3 Diagram X CD Servo & Decoder

16-1 List of Electrical Parts

16-2 List of Mechanical Parts

17-1 Service Tips and Corrections

SERVICE TIPS - Starting up

SERVICE TIPS - CD motor does not start

Troubleshooting steps for CD motor startup failure.

SERVICE TIPS - Anfaehren