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Pioneer M-90 - Service Manual

Pioneer M-90
18 pages
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Summary

SPECIFICATIONS

Amplifier Section

Details power output, distortion, impedance, and frequency response.

EXPLODED VIEWS AND PARTS LIST

SCHEMATIC DIAGRAM

ELECTRICAL PARTS LIST

BLOCK DIAGRAM

Overall Signal Flow Diagram

Illustrates the overall signal path and functional blocks of the amplifier.

CIRCUIT DESCRIPTIONS

INPUT SYSTEM

Describes how input signals are processed through the selection and buffer stages.

POWER AMP SECTION

Details the power amplifier's circuitry, distortion, and performance.

OUTPUT SYSTEM

Explains signal routing to speakers and headphones via relays.

PROTECTOR CIRCUIT

Explains the protection mechanism against overload and DC output.

POWER SYSTEM

Details the power supply design for separation and interference prevention.

IC DESCRIPTIONS

LC7555 Peak Hold Level Meter IC

Details the pin distribution and block diagram for the LC7555 IC.

SAFETY INFORMATION

SAFETY PRECAUTIONS

Outlines essential safety checks, especially leakage current.

PRODUCT SAFETY NOTICE

Warns about using correct replacement parts and safety characteristics.

Summary

SPECIFICATIONS

Amplifier Section

Details power output, distortion, impedance, and frequency response.

EXPLODED VIEWS AND PARTS LIST

SCHEMATIC DIAGRAM

ELECTRICAL PARTS LIST

BLOCK DIAGRAM

Overall Signal Flow Diagram

Illustrates the overall signal path and functional blocks of the amplifier.

CIRCUIT DESCRIPTIONS

INPUT SYSTEM

Describes how input signals are processed through the selection and buffer stages.

POWER AMP SECTION

Details the power amplifier's circuitry, distortion, and performance.

OUTPUT SYSTEM

Explains signal routing to speakers and headphones via relays.

PROTECTOR CIRCUIT

Explains the protection mechanism against overload and DC output.

POWER SYSTEM

Details the power supply design for separation and interference prevention.

IC DESCRIPTIONS

LC7555 Peak Hold Level Meter IC

Details the pin distribution and block diagram for the LC7555 IC.

SAFETY INFORMATION

SAFETY PRECAUTIONS

Outlines essential safety checks, especially leakage current.

PRODUCT SAFETY NOTICE

Warns about using correct replacement parts and safety characteristics.

Pioneer M-90 Specifications

General IconGeneral
TypeStereo Power Amplifier
Total Harmonic Distortion0.003%
Damping Factor100
Signal to Noise Ratio120dB
Power Output200 watts per channel into 8Ω (stereo)
Weight22.5kg

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