Teac BX-300 Service Manual

TEAC
SERVICE MANUAL
BX-300
High Speed DC Integrated Amplifier
BX-300
DC Integrated Amplifier
CONTENTS
1. Specifications and service data... 2.2... ee ee es 2
2. Parts WOCAtiON = 650 oS S0e Be aca Se ce ee a ee Stee ap ale a ae eS ee eae a ee 3
3. Adjustments and voltage conversion... 2.2... ee ee es 4
4. Block and level diagram 2... ee ee ee 6
5. Parts location and parts list (BX-500) 2.2... es 8
6. Parts location and parts list (BX-300) .. 2... 2. ee ee ee 14
7. PC boards and parts list (BX-500). 2... ee ee 20
8. PC boards and parts list (BX-300).. 2... ee ee 26
CAUTION
A. Parts marked with this sign are safety critical components. They must always be replaced
with identical components - refer to the TEAC Parts List and ensure exact replacement.
Effective: August, 1979 C-90019 5704001500

Teac BX-300 Specifications

General

Brand	Teac
Model	BX-300
Category	Amplifier
Language	English

Summary

Service Manual Overview

Cautionary Notes

Safety critical components must be replaced with identical ones.

Specifications and Service Data

Specifications

Detailed technical specifications for BX-500 and BX-300 models.

Service Data

Performance data and characteristics for BX-500 and BX-300 models.

Parts Location

Parts Location-1 (BX-500)

Visual identification of parts on the BX-500 front panel assembly.

Parts Location-1 (BX-300)

Visual identification of parts on the BX-300 front panel assembly.

Adjustments and Voltage Conversion

Before Adjustment

Preparation steps before performing unit adjustments.

Mid-Point Potential Adjustment

Procedure to adjust the mid-point potential using a DC voltmeter.

Idling Current Adjustment

Steps to adjust the idling current using a DC voltmeter.

Power Output Meter Adjustment (BX-500 only)

Procedure to adjust the power output meters on the BX-500.

Voltage Conversion (General Export Model Only)

Guide for converting voltage settings on export models.

Block and Level Diagram

BX-500 Block Diagram

Block diagram illustrating the signal flow for the BX-500.

BX-500 Level Diagram

Level diagram showing signal amplitudes at various stages for BX-500.

BX-300 Block Diagram

Block diagram illustrating the signal flow for the BX-300.

BX-300 Level Diagram

Level diagram showing signal amplitudes at various stages for BX-300.

Parts Location and Parts List (BX-500)

Parts Location-1 (BX-500)

Visual identification and reference numbers for BX-500 front panel parts.

Parts List (BX-500)

Detailed list of parts with part numbers and descriptions for BX-500.

Parts Location-2 (BX-500)

Visual identification and reference numbers for BX-500 rear/side panel parts.

Parts List (BX-500)

Detailed list of parts with part numbers and descriptions for BX-500.

Parts Location-3 (BX-500)

Visual identification and reference numbers for BX-500 internal components.

Parts Location-3 (BX-500)

Visual identification and reference numbers for BX-500 internal components.

Parts List (BX-500)

Detailed list of parts with part numbers and descriptions for BX-500.

Parts Location-4 (BX-500)

Visual identification and reference numbers for BX-500 internal components.

Parts List (BX-500)

Detailed list of parts with part numbers and descriptions for BX-500.

Parts Location-5 (BX-500)

Visual identification and reference numbers for BX-500 rear panel connectors.

Parts List (BX-500)

Detailed list of parts with part numbers and descriptions for BX-500.

Parts Location and Parts List (BX-300)

Parts Location-1 (BX-300)

Visual identification and reference numbers for BX-300 front panel parts.

Parts List (BX-300)

Detailed list of parts with part numbers and descriptions for BX-300.

Parts Location-2 (BX-300)

Visual identification and reference numbers for BX-300 rear/side panel parts.

Parts List (BX-300)

Detailed list of parts with part numbers and descriptions for BX-300.

Parts Location-3 (BX-300)

Visual identification and reference numbers for BX-300 internal components.

Parts Location-3 (BX-300)

Visual identification and reference numbers for BX-300 internal components.

Parts List (BX-300)

Detailed list of parts with part numbers and descriptions for BX-300.

Parts Location-4 (BX-300)

Visual identification and reference numbers for BX-300 internal components.

Parts List (BX-300)

Detailed list of parts with part numbers and descriptions for BX-300.

Parts Location-5 (BX-300)

Visual identification and reference numbers for BX-300 rear panel connectors.

Parts List (BX-300)

Detailed list of parts with part numbers and descriptions for BX-300.

PC BOARDS AND PARTS LIST (BX-500)

MAIN PCB ASSY

Component layout and identification for the BX-500 main PCB.

TONE CON AMPL PCB ASSY

Component layout and identification for the BX-500 Tone Control Amplifier PCB.

SW PCB ASSY

Component layout and identification for the BX-500 SW PCB.

VOLUME PCB ASSY

Component layout and identification for the BX-500 Volume PCB.

IN/OUTPUT PCB ASSY

Component layout and identification for the BX-500 In/Output PCB.

METER AMPL PCB ASSY

Component layout and identification for the BX-500 Meter Amplifier PCB.

MAIN PCB ASSY (Parts List)

Detailed component list for the BX-500 Main PCB.

TONE CON AMPL PCB ASSY (Parts List)

Component list for the BX-500 Tone Control Amplifier PCB.

SW PCB ASSY (Parts List)

Component list for the BX-500 SW PCB.

IN/OUTPUT PCB ASSY (Parts List)

Component list for the BX-500 In/Output PCB.

VOLUME PCB ASSY (Parts List)

Component list for the BX-500 Volume PCB.

METER AMPL PCB ASSY (Parts List)

Component list for the BX-500 Meter Amplifier PCB.

PC BOARDS AND PARTS LIST (BX-300)

MAIN PCB ASSY

Component layout and identification for the BX-300 main PCB.

TONE CON AMPL PCB ASSY

Component layout and identification for the BX-300 Tone Control Amplifier PCB.

SW PCB ASSY

Component layout and identification for the BX-300 SW PCB.

IN/OUTPUT PCB ASSY

Component layout and identification for the BX-300 In/Output PCB.

MAIN PCB ASSY (Parts List)

Detailed component list for the BX-300 Main PCB.

TONE CON AMPL PCB ASSY (Parts List)

Component list for the BX-300 Tone Control Amplifier PCB.

SW PCB ASSY (Parts List)

Component list for the BX-300 SW PCB.

IN/OUTPUT PCB ASSY (Parts List)

Component list for the BX-300 In/Output PCB.

Assembling Hardware Coding List

Screw Coding

Explanation of screw codes and types used in assembly.

Washer and Nut Coding

Explanation of washer and nut codes and types used in assembly.

TEAC SCHEMATIC DIAGRAM BX-500

Main PCB Schematic

Schematic diagram for the BX-500 Main PCB.

In/Output PCB Schematic

Schematic diagram for the BX-500 In/Output PCB.

SW PCB Schematic

Schematic diagram for the BX-500 SW PCB.

Volume PCB Schematic

Schematic diagram for the BX-500 Volume PCB.

Tone Con Ampl PCB Schematic

Schematic diagram for the BX-500 Tone Control Amplifier PCB.

Meter Ampl PCB Schematic

Schematic diagram for the BX-500 Meter Amplifier PCB.

DC Integrated Amplifier BX-300 Schematic

Tone Con Ampl PCB Schematic

Schematic diagram for the BX-300 Tone Control Amplifier PCB.

Main PCB Schematic

Schematic diagram for the BX-300 Main PCB.

LED PCB Schematic

Schematic diagram for the BX-300 LED PCB.