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Sony STR-KM5 - Service Manual

Sony STR-KM5
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SERVICE MANUAL
Sony Corporation
Audio & Video Business Group
Published by Sony EMCS (Malaysia) PG Tec
STR-KM5/KM7
MULTI CHANNEL AV RECEIVER
9-890-588-07
2014C80-1
©
2014.03
US Model
E Model
STR-KM5
Argentina Model
Saudi Arabia Model
South African Model
STR-KM5/KM7
Australian Model
Singapore Model
STR-KM7
Ver. 1.6 2014.03
STR-KM5 is the receiver section in HT-M5.
STR-KM7 is the receiver section in HT-M7.
– Continued on next page –
Photo: STR-KM7
This receiver incorporates Dolby* Digital and Pro Logic Surround and the DTS** Digital Surround System.
* Manufactured under license from Dolby Laboratories. Dolby, Pro Logic, and the double-D symbol are trademarks of Dolby Laboratories.
** Manufactured under license under U.S. Patent Nos: 5,956,674; 5,974,380; 6,226,616; 6,487,535 & other U.S. and worldwide patents issued & pending.
DTS, the Symbol, & DTS and the Symbol together are registered trademarks & DTS Digital Surround | 96/24 is a trademark of DTS, Inc. Product
includes software. © DTS, Inc. All Rights Reserved.
This receiver incorporates High-De nition Multimedia Interface (HDMI
TM
) technology.
HDMI, the HDMI logo, and HDMI High-De nition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC in the United
States and other countries.
“x.v.Color (x.v.Colour)” and “x.v.Color (x.v.Colour)” logo are trademarks of Sony Corporation.
“BRAVIA” is a trademark of Sony Corporation.
“PlayStation” is a registered trademark of Sony Computer Entertainment Inc.
MPEG Layer-3 audio coding technology and patents licensed from Fraunhofer IIS and Thomson.
“WALKMAN” is a registered trademark of Sony Corporation.
MICROVAULT is a trademark of Sony Corporation.
Windows media is either a registered trademark or trademark of Microsoft Corporation in the United States and/or other countries.
This product contains technology subject to certain intellectual property rights of Microsoft. Use or distribution of this technology outside of this product is
prohibited without the appropriate license(s) from Microsoft.
SPECIFICATIONS
Ampli er section
Power Output
• STR-KM7
Argentina model
Stereo mode output (rated) (6 ohms, 1 kHz, THD 1%)
120 W + 120 W
1)
Surround mode output
2)
(reference) (6 ohms, 1 kHz,
THD 30%)
RMS output
FRONT: 255 W per channel
1)
CENTER: 255 W
1)
SURROUND: 255 W per channel
1)
SURROUND BACK: 255 W per channel
1)
Surround mode
2)
(reference) (4 ohms, 100 Hz,
THD 30%)
SUBWOOFER: 280 W per channel
1)
Other models
Stereo mode output (rated) (6 ohms, 1 kHz, THD 1%)
120 W + 120 W
1)
Surround mode output
2)
(reference) (6 ohms, 1 kHz,
THD 10%)
RMS output
FRONT: 216 W per channel
1)
CENTER: 216 W
1)
SURROUND: 216 W per channel
1)
SURROUND BACK: 216 W per channel
1)
Surround mode
2)
(reference) (4 ohms, 100 Hz,
THD 10%)
SUBWOOFER: 250 W per channel
1)
1)
Measured under the following conditions:
Area Power requirements
SAF, SP 240 V AC, 50 Hz
EA 127 V AC, 60 Hz
AUS, AR 230 V AC, 50 Hz
2)
Reference power output for front, center, surround,
surround back speakers and subwoofers.
Depending on the sound eld settings and the source,
there may be no sound output.
• STR-KM5
AUDIO POWER SPECIFICATIONS
POWER OUTPUT AND TOTAL
HARMONIC DISTORTION:
(US model only)
Front L + Front R:
With 6 ohm loads, both channels driven, from
50 Hz – 20,000 Hz; rated 100 watts per channel
minimum RMS power, with no more than 0.2%
total harmonic distortion from 250 milliwatts to
rated output.
US, Latin America and Argentina models
Stereo mode output (rated) (6 ohms, 1 kHz, THD 1%)
120 W + 120 W
3)
Surround mode output
4)
(reference) (6 ohms, 1 kHz,
THD 30%)
RMS output
FRONT: 255 W per channel
3)
CENTER: 255 W
3)
SURROUND: 255 W per channel
3)
Surround mode
4)
(reference) (4 ohms, 100 Hz,
THD 30%)
SUBWOOFER: 280 W per channel
3)
Other models
Stereo mode output (rated) (6 ohms, 1 kHz, THD 1%)
120 W + 120 W
3)
Surround mode output
4)
(reference) (6 ohms, 1 kHz,
THD 10%)
RMS output
FRONT: 216 W per channel
3)
CENTER: 216 W
3)
SURROUND: 216 W per channel
3)
Surround mode
4)
(reference) (4 ohms, 100 Hz,
THD 10%)
SUBWOOFER: 250 W per channel
3)

Table of Contents

Questions and Answers

  • T
    Tanya BaileyAug 19, 2025
    Why is there no sound, no matter which equipment is selected, or only a very low-level sound is heard from my Sony STR-KM5?
    • J
      Jeffrey ArnoldAug 19, 2025
      If you experience no sound or very low sound from your Sony Home Theater System, regardless of the selected equipment, consider the following: * Verify that all connecting cords are fully inserted into the input/output jacks of the receiver, speakers, and equipment. * Ensure both the receiver and all equipment are powered on. * Check that the MASTER VOLUME is not set to “VOL MIN”. * Press MUTING on the remote control to disable the muting function. * Make sure you have connected to both the L and R jacks of an analog equipment. * Adjust the speaker level. * Check that the speaker cords are connected correctly and securely. * Note that some discs have no Dolby Digital Surround EX information.
  • R
    rebecca70Aug 21, 2025
    What to do if the remote control for my Sony STR-KM5 does not function?
    • J
      Joseph BarreraAug 21, 2025
      If the remote control for your Sony Home Theater System isn’t working, try these steps: * Point the remote control at the remote control sensor on the receiver. * Remove any obstacles between the remote control and the receiver. * Replace the batteries in the remote control with new ones if they are weak.
  • S
    Sara BarryAug 25, 2025
    What to do if there is no sound from a specific equipment connected to my Sony STR-KM5?
    • V
      Virginia RossAug 25, 2025
      If there is no sound from a specific equipment connected to your Sony Home Theater System, check the following: * Ensure the equipment is correctly connected to the audio input jacks for that equipment. * Verify the connecting cord(s) are fully inserted into the jacks on both the receiver and the equipment. * Check the INPUT MODE. * Check the setting of “AUDIO.OUT” in the HDMI menu. * Confirm the equipment is correctly connected to the HDMI jack for that equipment. * Note that you cannot listen to Super Audio CD by connecting HDMI.
  • H
    hollybradleyAug 26, 2025
    Why are the left and right sounds unbalanced or reversed on my Sony Home Theater System?
    • B
      Billy ValdezAug 26, 2025
      If the left and right sounds are unbalanced or reversed on your Sony Home Theater System, check that the speakers and equipment are connected correctly and securely. You can also adjust the level parameters using the LEVEL menu.
  • L
    Latasha VillarrealAug 28, 2025
    What to do if no image appears on my Sony STR-KM5 TV?
    • J
      Jesus CollierAug 28, 2025
      If no image appears on the TV when using your Sony Home Theater System, try the following: * Select the appropriate input using the input buttons. * Set your TV to the appropriate input mode. * Move your audio equipment away from the TV. * Ensure cables are correctly and securely connected to equipment. * Set up the playback equipment, depending on the equipment. * Use a High Speed HDMI cable, especially for 1080p, Deep Color, or 3D transmission.
  • J
    Jessica BallardAug 30, 2025
    Why does my Sony Home Theater System turn off automatically?
    • C
      Carrie SantiagoAug 30, 2025
      Your Sony Home Theater System receiver might be turning off automatically because “AUTO.STBY” is set to “STBY ON”, or the Sleep Timer function is active.
  • W
    wreynoldsSep 1, 2025
    What does USB FAIL mean on my Sony STR-KM5 Home Theater System and what to do?
    • A
      Angela DiazSep 1, 2025
      If your Sony Home Theater System displays “USB FAIL”, it indicates: * An over current from the USB port was detected. Check the USB device, then unplug it and turn on the power again. * Irregular current is output to the speakers, or the receiver is covered and ventilation holes are blocked. Remove the object covering the upper panel of the receiver, check the speaker connection, and turn on the power again.
  • J
    jacob99Sep 3, 2025
    What to do if recording cannot be carried out on my Sony STR-KM5?
    • O
      omar37Sep 3, 2025
      If you cannot record with your Sony Home Theater System, please check the following: * Verify that the equipment is connected correctly. * Select the source equipment using the input buttons. * Note that audio input signals via HDMI IN and DIGITAL IN jacks cannot be recorded. * The source may contain copyright protection to prevent recording.
  • K
    Kyle GordonSep 5, 2025
    Why is the FM reception poor on my Sony Home Theater System?
    • S
      sandra54Sep 5, 2025
      To improve poor FM reception on your Sony Home Theater System, use a 75-ohm coaxial cable to connect the receiver to an outdoor FM antenna.
  • A
    Amanda MurraySep 7, 2025
    What to do if the Control for HDMI function does not work on my Sony STR-KM5?
    • M
      Megan RobinsonSep 7, 2025
      If the Control for HDMI function is not working on your Sony Home Theater System, verify the following: * Check the HDMI connection. * Make sure “CTRL.HDMI” is set to “CTRL ON” in the HDMI menu. * Ensure the connected equipment is compatible with the Control for HDMI function.

Summary

Servicing Notes

Notes on Chip Component Replacement

General precautions for replacing chip components, including tantalum capacitors.

Unleaded Solder Handling

Characteristics and handling of unleaded solder for soldering processes.

Special Component Notice

Notice regarding components with confidential information requiring strict adherence to instructions.

Digital Audio Board IC Replacement Note

Specific instruction that IC2036 and IC2811 on the DIGITAL AUDIO board must be exchanged as a unit.

HDMI RE PC Board IC Replacement Note

Specific instruction that IC3500 and IC3501 on the HDMI RE PC board must be exchanged as a unit.

Display Board Discrimination

Information on distinguishing between two types of DISPLAY boards (Suffix-12 and Suffix-21).

Disassembly Procedures

Disassembly Flow

Step-by-step guide outlining the sequence of disassembly for the main unit.

Test Mode Operations

User Initialize Mode

Process to clear all user settings and return the unit to factory defaults.

Electrical Check Procedures

Diagrams Overview

Block Diagram - TUNER;AUDIO Section

Overview of the signal flow and interconnections for the tuner and audio processing sections.

Block Diagram - DIGITAL Section

Diagram showing the digital signal processing path, including DAC and interface circuits.

Block Diagram - VIDEO Section

Illustration of the video signal processing and switching paths.

Block Diagram - HDMI Section

Overview of the HDMI signal processing, receiver, and transmitter components.

Block Diagram - KEY;DISPLAY;USB Section

Diagram illustrating the control, display driver, and USB interface signal paths.

Sony STR-KM5 Specifications

General IconGeneral
Audio Channels5.1
TypeHome Theater Receiver
Frequency Response20Hz - 20kHz
Inputs2 x composite video
Outputs1 x HDMI, composite video
Surround Sound FormatsDolby Digital, DTS

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