DOWNLOAD Sony STR-KM2 / STR-KM3 Service Manual ↓ Size: 5.28 MB | Pages: 82 in PDF or view online for FREE

2014C80-1

© 

2014.03

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-Defi nition Multimedia Interface (HDMI

TM

) technology.

HDMI, the HDMI Logo, and High-Defi 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.

Amplifi er section
Power Output
E51 and AR models
Stereo mode output (rated) (6 ohms, 1 kHz, THD 1%)
   

104 W + 104 W

1)

Surround mode output

2)

 (reference) (6 ohms,

1 kHz, THD 30%)
  

RMS 

output

FRONT: 

220 W per channel

1)

CENTER: 220 

W

1)

 (STR-KM3)

SURROUND:

 

220 W per channel

1)

Surround mode

2)

 (reference) (6 ohms, 100 Hz,

THD 30%)
SUBWOOFER: 

220 W per channel

1)

Other models
Stereo mode output (rated) (6 ohms, 1 kHz, THD 1%)
   

104 W + 104 W

1)

Surround mode output

2)

 (reference) (6 ohms,

1 kHz, THD 10%)
  

RMS 

output

FRONT: 

170 W per channel

1)

  

(STR-KM3)

   

165 W per channel

1)

  

(STR-KM2)

CENTER: 170 

W

1)

 (STR-KM3)

SURROUND:

 

170 W per channel

1)

  

(STR-KM3)

   

165 W per channel

1)

  

(STR-KM2)

Surround mode

2)

 (reference) (6 ohms, 100 Hz,

THD 10%)
SUBWOOFER: 

175 W per channel

1)

  

(STR-KM3)

   

170 W per channel

1)

  

(STR-KM2)

1)

Measured under the following conditions:

 SAF, E51, SP 

240 V AC, 50 Hz

 MX 

127 V AC, 60 Hz

 AR, TH, AUS, RU  230 V AC, 50 Hz
 EA 

127 V AC, 50 Hz

2) 

Reference power output for front, center, 

  surround speakers and subwoofers. Depending
  on the sound fi eld settings and the source, 
  there may be no sound output.

Inputs
  Analog 

Sensitivity: 800 mV/

  

50 

kilohms

  Digital (Coaxial) 

Impedance: 75 ohms

Outputs (Analog)
  AUDIO OUT 

Voltage: 800 mV/

  

1 

kilohm

Tone
  Gain levels 

±6 dB, 1 dB step

Reproduction frequency range:
   

28 Hz – 20,000 Hz

FM tuner section
Tuning range 

87.5 MHz – 108.0 MHz

Antenna (aerial) 

FM wire antenna (aerial)

Antenna (aerial) terminals
   

75 ohms, unbalanced

•  STR-KM2 is the receiver section in HT-M2.
•  STR-KM3 is the receiver section in HT-M3.

Photo: STR-KM3

– Continued on next page –

AM tuner section
Tuning range

10 kHz step  9 kHz step

E51, AR, MX

530 kHz – 

531 kHz – 

1,710 kHz 

1,710 kHz

EA, SAF, AUS, 
TH, SP, RU

 

–

 

531 kHz –

  

1,602 

kHz

Antenna (aerial) 

Loop antenna (aerial)

USB section
(except SAF, AR)
Supported bit rate* 

MP3 (MPEG 1 Audio

  

Layer-3):

   

32 kbps – 320 kbps, VBR

   

WMA: 48 kbps – 192 kbps

   

AAC: 48 kbps – 320 kbps

   

*  Compatibility with all

  

 encoding/writing

  

 software, 

recording

   

  devices and recording

   

  media cannot be 

  

 guaranteed.

Transfer speed 

Full-speed

Supported USB device
   

Mass Storage Class

Maximum current 

500 mA

General
Power requirements

 SAF, TH, SP 

230 V AC – 240 V AC, 50/60 Hz

 MX 

127 V AC, 60 Hz

 E51 

120/220/240 V AC, 50/60 Hz

 AR 

220 V AC – 230 V AC, 50/60 Hz

 EA 

120 V AC – 127/220/230 V 

  

AC – 240 V AC, 50/60 Hz

 AUS 

230 V AC, 50 Hz

 RU 

230 V AC, 50/60 Hz

Power consumption 

175 W (STR-KM3)

  

155 W (STR-KM2)

Power consumption (during standby mode)
  

0.3 W (When

   

“CTRL.HDMI” is set to

   

“CTRL OFF” (STR-KM3))

Dimensions (width/height/depth) (Approx.)
   

430 mm × 178 mm ×

  

336 mm

   

including projecting parts

  

and controls

Mass (Approx.) 

8.1 kg (STR-KM3)

   

8.0 kg (STR-KM2)

Design and specifi cations are subject to
change without notice.

• Abbreviation
 AR  : 

Argentina 

model

 AUS : 

Australian 

model 

  E51 

: Chilean and Peruvian models

  EA 

: Saudi Arabia model

  MX 

: Mexican model

  RU 

: Russian model

  SAF 

: South African model

  SP 

: Singapore model

 TH  : 

Thai 

model

COMPONENTS  IDENTIFIED  BY  MARK 0 OR  DOTTED  LINE  
WITH  MARK 0 ON  THE  SCHEMATIC  DIAGRAMS  AND  IN  
THE  PARTS  LIST  ARE  CRITICAL  TO  SAFE  OPERATION.
REPLACE  THESE  COMPONENTS  WITH  SONY  PARTS 

 ................................................. 4

2-1.   Disassembly Flow .............................................................. 6
2-2.   Case .................................................................................... 6
2-3.   Front Panel Section ............................................................ 7
2-4.   Back Panel Section ............................................................ 7
2-5.   Main Block Section ........................................................... 8
2-6.   MAIN Board, THERMAL Board ...................................... 8

 ................................................................ 9

 ............................................11

5-1.  Block Diagram - TUNER/AUDIO Section - ................... 13
5-2.  Block Diagram - DIGITAL Section -............................... 14
5-3.  Block Diagram - HDMI Section - .................................... 15
5-4.  Block Diagram - KEY/DISPLAY/USB Section -............ 16
5-5.  Block Diagram - POWER KEY Section - ....................... 17
5-6. Printed 

Wiring 

Board 

- DIGITAL AUDIO Board (Side A) - .............................. 19

5-7. Printed 

Wiring 

Board 

- DIGITAL AUDIO Board (Side B) - .............................. 20

5-8. Schematic 

Diagram 

- DIGITAL AUDIO Board (1/4) - .................................... 21

5-9. Schematic 

Diagram 

- DIGITAL AUDIO Board (2/4) - .................................... 22

5-10. Schematic Diagram 

- DIGITAL AUDIO Board (3/4) - .................................... 23

5-11. Schematic Diagram 

- DIGITAL AUDIO Board (4/4) - .................................... 24

5-12.  Printed Wiring Board - MAIN Board - ............................ 25
5-13.  Schematic Diagram - MAIN Board (1/4) - ...................... 26
5-14.  Schematic Diagram - MAIN Board (2/4) - ...................... 27
5-15.  Schematic Diagram - MAIN Board (3/4) -. ..................... 28
5-16.  Schematic Diagram - MAIN Board (4/4) - ...................... 29

5-17. Printed Wiring Board 

- HDMI RE Board (Side A) (KM3) - ............................... 30

5-18. Printed Wiring Board 

- HDMI RE Board (Side B) (KM3) -  .............................. 31

5-19. Schematic Diagram 

- HDMI RE Board (1/2) (KM3) - .................................... 32

5-20. Schematic Diagram 

- HDMI RE Board (2/2) (KM3) - .................................... 33

5-21.  Printed Wiring Board - POWER AVIDEO Board - ......... 34
5-22.  Schematic Diagram - POWER AVIDEO Board - ............ 35
5-23.  Printed Wiring Board - DISPLAY Board - ...................... 36
5-24.  Schematic Diagram - DISPLAY Board - ......................... 37
5-25.  Printed Wiring Board - DCDC Board - ........................... 38
5-26.  Schematic Diagram - DCDC Board - .............................. 39
5-27.  Printed Wiring Board - LED BAR Board - ...................... 40
5-28.  Schematic Diagram - LED BAR Board - ........................ 40
5-29. Printed Wiring Board 

- USB Board (EXCEPT SAF, AR) - ................................ 41

5-30. Schematic Diagram 

- USB Board (EXCEPT SAF, AR) - ................................ 42

5-31.  Printed Wiring Board - TUNER1 Board - ....................... 43
5-32.  Schematic Diagram - TUNER1 Board - .......................... 43
5-33.  Printed Wiring Board - POWER KEY Board -................ 44
5-34.  Schematic Diagram - POWER KEY Board - .................. 44
5-35.  Printed Wiring Board - THERMAL Board - ................... 44
5-36.  Schematic Diagram - THERMAL Board - ...................... 44

6-1. Case 

Section 

..................................................................... 58

6-2.  Front Panel Section .......................................................... 59
6-3.  Back Panel Section .......................................................... 60
6-4. Chassis 

Section 

................................................................ 61

6-5. Heatsink 

Section 

.............................................................. 62

 ................................ 63

Notes on chip component replacement
• 

Never reuse a disconnected chip component.

• 

Notice that the minus side of a tantalum capacitor may be da-

 

maged by heat.

UNLEADED  SOLDER
Boards requiring use of unleaded solder are printed with the lead-
free mark (LF) indicating the solder contains no lead.
(Caution: Some printed circuit boards may not come printed with 

the lead free mark due to their particular size)

Unleaded solder has the following characteristics.
•   Unleaded solder melts at a temperature about 40 °C higher 

than ordinary solder.

 

Ordinary soldering irons can be used but the iron tip has to be 
applied to the solder joint for a slightly longer time.

 

Soldering irons using a temperature regulator should be set to 
about 350 °C.
Caution:  The printed pattern (copper foil) may peel away if the 

heated tip is applied for too long, so be careful!

•   Strong viscosity
 

Unleaded solder is more viscou-s (sticky, less prone to fl ow) 
than ordinary solder so use caution not to let solder bridges 
occur such as on IC pins, etc.

•   Usable with ordinary solder
 

It is best to use only unleaded solder but unleaded solder may 
also be added to ordinary solder.

Special Component Notice
The components identifi ed by mark 9 contain confi dential
information.
Strictly follow the instructions whenever the components are
repaired and/or replaced.

NOTE  OF  REPLACING  THE  IC2036  AND  IC2811  ON  
THE  DIGITAL  AUDIO  BOARD
IC2036 and IC2811 on the DIGITAL AUDIO board cannot 
exchange with single. When these parts on the DIGITAL AUDIO 
board are damaged, exchange the entire mounted board.

NOTE  OF  REPLACING  THE  IC3500  AND  IC3501  ON  
THE  HDMI  RE  BOARD (KM3)
IC3500 and IC3501 on the HDMI RE board cannot exchange 
with single. When these parts on the HDMI RE board are 
damaged, exchange the entire mounted board.

KM3: SAF

4-409-905-0[]

KM3: TH

4-409-905-2[]

KM3: AUS

4-409-905-3[]

KM3: EA

4-409-905-4[]

KM3: E51

4-409-905-6[]

KM3: MX

4-409-905-7[]

KM3: AR

4-409-905-8[]

KM3: SP

4-409-905-9[]

KM2: SAF

4-409-906-0[]

KM2: E51

4-409-906-1[]

KM2: AR

4-409-906-2[]

KM3: RU

4-430-214-1[]

• Abbreviation
 AR  : 

Argentina 

model

 AUS : 

Australian 

model

  E51 

: Chilean and Peruvian models

  EA 

: Saudi Arabia model

  MX 

: Mexican model

  RU 

: Russian model

  SAF 

: South African model

  SP 

: Singapore model

 TH  : 

Thai 

model