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Marantz SR4021 - Service Manual

Marantz SR4021
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SR4021
Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
Service
Manual
SR4021
Receiver
SR4021 /
N1B/N1S/U1B
Part no. 90M13CW855010
First Issue 2006.06
MZ
TABLE OF CONTENTS
SECTION PAGE
1. TECHNICAL SPECIFICATIONS ........................................................................................... 1
2.
SOFTWARE VERSION CHECK ........................................................................................2
3. ABOUT REPLACE THE MICROPROCESSOR WITH A NEW ONE ................................ 2
4. WIRING DIAGRAM .............................................................................................................. 3
5. BLOCK DIAGRAM ............................................................................................................... 5
6. SCHEMATIC DIAGRAM ...................................................................................................... 7
7. PARTS LOCATION .............................................................................................................11
8. MICROPROCESSOR AND IC DATA ...................................................................................21
9. EXPLODED VIEW AND PARTS LIST ............................................................................... 25
10. SERVICE PROCEDURE .................................................................................................... 29
11. ELECTRICAL PARTS LIST ................................................................................................ 30
RECORDER
RECORDER
F/P
F/PBAND
BALANCE
BALANCE
SPEAKERS
SPEAKERS
2
SOURCE
SOURCE
DIRECT
DIRECT
SPEAKERS
DISPLAY OFF
DISPLAY OFF
2
1
BASS
TREBLE
TREBLE
VCR
T-MODE
T-MODE
CLEAR
CLEAR
AUTO TUNE
AUTO TUNE
MEMORY
MEMORY
1
DVD
DVD
DSS
DSS21 AUXTUNERCDPHONO
DOWN
DOWN
VOLUME
VOLUME
MULTI JOG
MULTI JOG
UP
RECEIVER SR4021
RECEIVER SR4021
SLEEP
SLEEP
DIMMER
DIMMER
MUTE
MUTE
STANDBY
STANDBY
PHONES
PHONES
POWER ON/OFF
POWER ON/OFF

Table of Contents

Other manuals for Marantz SR4021

Preview: Specification Sheet
Specification Sheet2 pages
Preview: User Guide
User Guide23 pages

Questions and Answers

  • D
    dsnyderJul 29, 2025
    What to do if my Marantz SR4021 Receiver has no sound and picture even when power is on?
    • C
      Christopher BautistaJul 29, 2025
      If your Marantz Receiver is not producing any sound or picture, even when powered on, there might be several reasons: * The mute function may be activated. Deactivate mute using the remote control. * The input cable may not be properly connected. Check the connection diagram and ensure all cables are correctly connected. * The master volume control might be set too low. Adjust the master volume to an audible level. * The function selector could be in the wrong position. Select the correct input source.
  • H
    harrisalyssaAug 2, 2025
    Why control with the remote control unit fails on my Marantz SR4021?
    • B
      Benjamin MyersAug 2, 2025
      If the remote control is not working with your Marantz SR4021 Receiver, consider these potential causes: * The batteries may be dead. Replace all batteries with new ones. * The remote controller's function-key setting may be incorrect. Select the correct equipment to be controlled. * The distance between the remote and the SR4021 may be too far. Move closer to the SR4021. * There may be an obstruction between the remote and the SR4021. Remove any objects blocking the signal.
  • G
    Gabriel TranAug 6, 2025
    Why does FM or AM reception fail on my Marantz Receiver?
    • T
      Tim RobertsAug 6, 2025
      If you are experiencing FM or AM reception issues with your Marantz Receiver, it is likely due to an incomplete antenna connection. Ensure that the indoor FM and AM antennas are correctly connected to the FM and AM antenna outlets.
  • M
    Matthew CortezAug 10, 2025
    Why is sound only heard from one of front speakers on my Marantz SR4021?
    • N
      Nicole MartinAug 10, 2025
      If you are only hearing sound from one front speaker on your Marantz Receiver, it could be due to: * The BALANCE control being set to one extreme. Adjust the BALANCE control to the center. * One of the connection cords being disconnected. Ensure that both the right and left connection cords are securely connected.
  • W
    William HayesAug 15, 2025
    What to do if I have incorrect Audio or Video for selected source on my Marantz SR4021 Receiver?
    • M
      Max RogersAug 15, 2025
      If you're getting incorrect audio or video for the selected source on your Marantz Receiver, it's likely due to an incorrectly connected input cable. Refer to the connection diagram and ensure the cable is connected correctly.
  • J
    Jeffrey GeorgeAug 19, 2025
    Why is noise heard during AM reception on my Marantz Receiver?
    • M
      Misty FuentesAug 19, 2025
      If you are hearing noise during AM reception on your Marantz Receiver, it may be due to interference from other electrical fields. Try changing the location where the AM indoor antenna is set up.
  • J
    James AriasAug 25, 2025
    Why is noise heard during FM reception on my Marantz SR4021 Receiver?
    • J
      justin84Aug 25, 2025
      If you are experiencing noise during FM reception with your Marantz Receiver, it could be due to weak radio waves from the broadcasting station. Consider installing an FM outdoor antenna to improve reception.

Summary

Marantz Design and Service

Ordering Replacement Parts

Details on how to order replacement parts from Marantz subsidiaries or agents.

Shock and Fire Hazard Service Test

Safety test procedure involving resistance measurement before returning the unit to the customer.

Technical Specifications

FM Tuner Specifications

Technical specifications for the FM tuner, including frequency range, sensitivity, and distortion.

AM Tuner Specifications

Technical specifications for the AM tuner, including frequency range, sensitivity, and distortion.

Audio Specifications

Technical specifications for the audio output, including rated power, THD, and input sensitivity.

Unit Dimensions

Physical dimensions of the SR4021 receiver unit.

Software Version Check

Microprocessor Replacement Guidelines

Wiring Diagram

Block Diagram

Schematic Diagram

Parts Location Guide

Microprocessor and IC Data

IC91: TMP87 PM78 F Details

Detailed data and pin functions for IC91, the TMP87PM78F microprocessor.

IC22: TC9163 AF Details

Detailed data and pin functions for IC22, the TC9163AF.

IC23: TC9164 AF Details

Detailed data and pin functions for IC23, the TC9164AF.

Exploded View and Parts List

Service Procedure

Tuner Alignment Instructions

Instructions and necessary equipment for performing tuner alignment procedures.

Tuner Alignment Procedure

Step-by-step guide for aligning the tuner, including required signal parameters.

Tuner Alignment Points

Visual reference showing specific adjustment points on the tuner module for alignment.

Electrical Parts List

Resistor Parts List

List of resistors with part numbers, values, and specifications.

Capacitor Parts List

List of capacitors, including ceramic and electrolytic types, with specifications.

Fusible Resistor Safety Notes

Important safety notes and supplier information for fusible resistors.

General Safety Precautions

Safety warnings regarding part replacement and potential fire or shock hazards.

Marantz SR4021 Specifications

General IconGeneral
BrandMarantz
ModelSR4021
CategoryReceiver
LanguageEnglish

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