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Marantz 2238 Service Manual

Marantz 2238
48 pages
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Marantz 2238 Specifications

General IconGeneral
Power Output38 watts per channel into 8Ω (stereo)
Total Harmonic Distortion0.1%
Tuning RangeFM, MW
Damping Factor45
Speaker Load Impedance4Ω to 16Ω
Signal to Noise Ratio85dB (line)
Input Sensitivity180mV (line)
OutputHeadphones

Summary

Introduction and Service Notes

Service Notes

Lists chassis units and their board locations for servicing.

Test Equipment Required for Servicing

AM Alignment Procedures

AM IF Alignment

Procedure for aligning the AM intermediate frequency stage.

AM Frequency Range and Tracking Alignment

Steps for aligning AM frequency range and tracking.

FM Alignment Procedures

FM Frequency Range and Tracking Alignment

Steps for aligning FM frequency range and tracking.

Stereo Separation Alignment

Procedure to adjust for maximum stereo separation.

Muting Threshold Adjustment

How to set the FM muting threshold level.

FM Dolby Level Adjustment

Adjusts the FM Dolby signal level for correct playback.

Power and Voltage Adjustments

Power Amplifier Adjustment

Procedure for adjusting the power amplifier.

Power Supply Adjustment

Procedure for adjusting the power supply.

Voltage Conversion for European Model

Instructions for converting voltage for European models.

Diagrams and Schematics

Block Diagram

Overall system signal flow representation.

Inter Connection Diagram - U.S.A. & Canada

Wiring diagram for USA and Canadian models.

Inter Connection Diagram - Europe

Wiring diagram for European models.

Schematic Diagram - U.S.A. & Canada

Detailed circuit diagram for USA and Canadian models.

Schematic Diagram - Europe

Detailed circuit diagram for European models.

Board Schematics and Component Locations

Circuit and layout details for specific internal boards.

Major Component Locations

Cabinet Views

Visual guides to component placement on cabinet (Front, Rear, Europe).

Chassis Views

Visual guides to component layout on the chassis (Top, Bottom, Europe).

Exploded Views

Mechanical Exploded View

Visual guide showing exploded mechanical parts for assembly.

Parts List

Technical Specifications

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