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Marantz SR7300 - Service Manual

Marantz SR7300
63 pages
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AV SURROUND RECEIVER SR7300
UP
SURROUND
VOLUME
DOWN
MEMORY
TUNING
MODE
F/P
CLEAR
S-DIRECT MULTIROOM
MUTE
A/D7.1CH INPUTSPEAKRS A/B
POWER ON/STANDBY
PHONES
ENTER
STANDBY
AUX1 INPUT
S-VIDEODIGITAL VIDEO L AUDIO R
DSS/VCR2
AUX1 AUX2
VCR1
DVD
TV
CD
CD-R
TAPE
TUNER
ATT
SELECT
DISP MULTI AUTO TUNED ST V
OFF NIGHT PEAK ANALOG
DIGITAL
ATT
SLEEP
SURR
AUTO
DIRECT DISC 6.1 MTX 6.1 SPKR AB EQ
DIGITAL
SURROUND
PCM
L
C
R
SL S SR
LFE
AV Surround Receiver
SR7300 / SR7300OSE / PS7300
03AJ855010 MIT
First Issue 2002.11
SR7300 /
N1B/U1B/K1G/N1G/U1G
SR7300F /
N1B/U1B/K1G/N1G/U1G
R
SR7300 / SR7300F
Please use this service manual with referring to the user guide ( D.F.U. ) without fail.
Service
Manual
PS7300 /
F1B/F1N
AV Surround Amplifi er
PS7300
TABLE OF CONTENTS
SECTION PAGE
1. TECHNICAL SPECIFICATIONS AND SERVICE TOOL ........................................ 1
2. TECHNICAL DESCRIPTION................................................................................. 4
3. WIRING DIAGRAM................................................................................................ 5
4. BLOCK DIAGRAM................................................................................................. 7
5. SCHEMATIC DIAGRAM ........................................................................................ 9
6. PARTS LOCATION .............................................................................................. 25
7. IC DATA................................................................................................................ 36
8. EXPLODED VIEW AND PARTS LIST ................................................................. 47
9. SERVICE PROGRAM.......................................................................................... 51
10. UPDATE FIRMWARE .......................................................................................... 53
11. POWER AMPLIFIER ADJUSTMENT.................................................................. 55
12. SYSTEM ERROR................................................................................................ 56
13. TROUBLE SHOOTING........................................................................................ 57
14. ELECTRICAL PARTS LIST ................................................................................. 61
All manuals and user guides at all-guides.com
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Questions and Answers

  • C
    Christina WatsonSep 2, 2025
    Why is the sound coming from the wrong channel on my Marantz Receiver?
    • A
      Ariel OsborneSep 2, 2025
      If the sound from your Marantz Receiver is coming from the wrong channel, the speaker cable may be connected incorrectly. Refer to the connection diagram and connect the cable correctly.
  • C
    Carrie OchoaSep 3, 2025
    How to eliminate noise during AM reception on my Marantz Receiver?
    • P
      Paul EspinozaSep 3, 2025
      If you are experiencing noise during AM reception on your Marantz Receiver, it might be due to interference from other electrical fields. Try changing the location where the AM indoor antenna is set up.
  • T
    Thomas StarkSep 4, 2025
    What causes noise during FM reception on my Marantz Receiver?
    • R
      Ryan SilvaSep 4, 2025
      If you're hearing noise during FM reception on your Marantz Receiver, it could be due to weak radio waves from the broadcasting station. Consider installing an FM outdoor antenna.
  • K
    Kristie RobinsonSep 5, 2025
    Why can't I select EX/ES mode on my Marantz Receiver?
    • L
      Laura SteinSep 5, 2025
      If you cannot select EX/ES mode on your Marantz Receiver, it could be because: * Surround center= NONE has been selected in SPEAKERS SIZE SETUP. Make the correct setting. * The input signal is incompatible. Use a 5.1 channel source.
  • V
    Veronica OsborneSep 6, 2025
    Why can't I select Pro Logic II mode on my Marantz Receiver?
    • R
      Richard RobertsSep 6, 2025
      If you cannot select Pro Logic II mode on your Marantz Receiver, the input signal might be incompatible. Use a 2 channel Dolby Digital input signal, PCM input signal, or analog input signal.
  • S
    Sheila TaylorSep 6, 2025
    Why can't I select Neo:6 mode on my Marantz Receiver?
    • M
      margaretjenkinsSep 6, 2025
      If you cannot select Neo:6 mode on your Marantz Receiver, the input signal may be incompatible. Use a 2 channel Dolby Digital input signal, PCM input signal, or analog input signal.

Summary

1. Technical Specifications and Service Tool

Technical Specifications

Detailed specifications for FM/AM tuners, audio, and video sections.

Service Tool Information

Details about the necessary service tool for unit updates.

2. Technical Description

Audio Technologies Overview

Explains DTS, Neo:6, Dolby Digital EX, and CS-II audio formats.

3. Wiring Diagram

4. Block Diagram

5. Schematic Diagram

6. Parts Location

7. IC Data

8. Exploded View and Parts List

9. Service Program

Factory Mode and Product Reset

Procedures for tuner adjustment and system memory reset.

10. Update Firmware

Firmware Update Procedures

Instructions for updating CPU and DSP firmware.

11. Power Amplifier Adjustment

Idling Current Alignment

Steps to adjust the idling current for optimal power amplifier performance.

12. System Error and Troubleshooting

System Error Codes

Identifies and explains error messages displayed on the unit.

Trouble Shooting Guide

Flowcharts to diagnose and resolve common operational issues.

14. Electrical Parts List

Parts Identification and Safety

Explains parts codes, resistor/capacitor identification, and safety notes.

Marantz SR7300 Specifications

General IconGeneral
TypeStereo Receiver
Total Harmonic Distortion (THD)0.08%
Signal-to-Noise Ratio100 dB
Input Sensitivity200 mV
Headphone OutputYes
Power Output100 W per channel (8 ohms)
Frequency Response10 Hz - 100 kHz
Input Impedance47k ohms
Digital InputsCoaxial, Optical
Analog Inputs6
Analog Outputs1
Tuner SectionAM/FM

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