HT-7200DH, STR-K7200 - Sony Audio Service Manual (repair manual)

ht-7200dh, str-k7200 service manual
Model
HT-7200DH STR-K7200
Pages
84
Size
5.64 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
ht-7200dh-str-k7200.pdf
Date

Read Sony HT-7200DH / STR-K7200 Service Manual online

SERVICE MANUAL
Sony Corporation
Audio&Video Business Group
Published by Sony Techno Create Corporation
STR-K7200
SPECIFICATIONS
MULTI CHANNEL AV RECEIVER
9-887-947-02
2010B05-1
© 
2010.02
US Model
Ver. 1.1  2010.02
•  STR-K7200 is the receiver section in HT-7200DH.
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 #’s: 5,451,942; 5,956,674; 5,974,380; 5,978,762; 6,487,535 
     & other U.S. and worldwide patents issued & pending. DTS and DTS Digital Surround are registered 
     trademarks and the DTS logos and Symbol are trademarks of DTS, Inc. © 1996-2007 DTS, Inc. 
     All Rights Reserved.
This receiver incorporates High-Definition Multimedia Interface (HDMI
TM
) technology.HDMI, the HDMI logo 
and High-Definition Multimedia Interface are trademarks or registered trademarks of HDMI Licensing LLC.
The XM name and related logo are registered trademarks of XM Satellite Radio Inc. All rights reserved.
“x.v.Color” and “x.v.Color” logo are trademarks of Sony Corporation.
“BRAVIA” and                      are trademarks of Sony Corporation.
AUDIO POWER 
SPECIFICATIONS
POWER OUTPUT AND TOTAL 
HARMONIC DISTORTION:
With 6 ohm loads, both channels driven, from 
120 – 20,000 Hz; rated 90 watts per channel 
minimum RMS power, with no more than 1% 
total harmonic distortion from 250 milliwatts 
to rated output.
Amplifier section
Power Output
1)
Stereo mode (rated) 
(6 ohms 1
 kHz, THD 1%)
 
90 W + 90 W
Surround mode (reference)
(6 ohms 1 kHz
, THD 10%)
 
RMS Output
2)
 
 
FRONT: 140 W 
 
per channel
 
CENTER: 140 W
 
SURROUND: 140 W 
 
per channel
1)
Measured under 120 V AC, 60 Hz
2)
Reference power output for front, center and 
surround speakers. Depending on the sound field 
settings and the source, there may be no sound 
output.
Inputs
Analog
Sensitivity: 800 mV/
 
50 kohms
Digital (Coaxial) Impedance: 75 ohms
Outputs (Analog)
AUDIO OUT
Voltage: 800 mV/
 
10 kohms
SUB WOOFER
Voltage: 2 V/1 kohm
Tone
Gain levels
±6 dB, 1 dB step
Reproduction frequency range
28 – 20,000 Hz
FM tuner section
Tuning range
87.5 – 108.0 MHz
Antenna
FM wire antenna
Antenna terminals
75 ohms, unbalanced
Intermediate frequency
10.7 MHz
AM tuner section
Tuning range
With 10-kHz tuning scale:
530 – 1,710 kHz
3)
With 9-kHz tuning scale:
531 – 1,710 kHz
3)
Antenna
Loop antenna
Intermediate frequency
 
450 kHz
3)
You can change the AM tuning scale to 9 kHz or 
10 kHz. After tuning in any AM station, turn off 
the receiver. While holding down TUNING 
MODE, press 
?/1. All preset stations will be 
erased when you change the tuning scale. To reset 
the scale to 10 kHz (or 9 kHz), repeat the 
procedure.
Video section
Inputs/Outputs
Video:
1 Vp-p, 75 ohms
COMPONENT VIDEO:
Y: 1 Vp-p, 75 ohms
P
B
/C
B
: 0.7 Vp-p, 75 ohms
P
R
/C
R
: 0.7 Vp-p, 75 ohms
80 MHz HD Pass Through
– Continued on next page –
STR-K7200
2
Design and specifi cations are subject to 
change without notice.
SAFETY-RELATED COMPONENT WARNING!
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 
 
WHOSE  PART  NUMBERS  APPEAR  AS  SHOWN  IN  THIS  
MANUAL  OR  IN  SUPPLEMENTS  PUBLISHED  BY  SONY.
 
 
 
 
 
General
Power requirements 120 V AC, 60 Hz
Power output (DIGITAL MEDIA PORT)
DC OUT
5 V, 0.7A MAX
Power consumption 170 W
Power consumption (during standby mode)
0.3 W (when “CONTROL 
FOR HDMI” in VIDEO 
menu is set to “CTRL 
OFF”)
Dimensions (w/h/d) (Approx.)
17 × 6 1/4 × 12 5/8 inches
 
(430 × 157.5 × 318 mm) 
including projecting parts 
and controls 
Mass (Approx.)
17 lb 4 oz (7.8 kg)
Notes on chip component replacement
• 
Never reuse a disconnected chip component.
• 
Notice that the minus side of a tantalum capacitor may be dam-
aged by heat.
SAFETY  CHECK-OUT
After correcting the original service problem, perform the follow-
ing safety check before releasing the set to the customer:
Check the antenna terminals, metal trim, “metallized” knobs, 
screws, and all other exposed metal parts for AC leakage.
Check leakage as described below.
LEAKAGE  TEST
The AC leakage from any exposed metal part to earth ground and 
from all exposed metal parts to any exposed metal part having a 
return to chassis, must not exceed 0.5 mA (500 microamperes.). 
Leakage current can be measured by any one of three methods.
1.  A commercial leakage tester, such as the Simpson 229 or RCA 
WT-540A. Follow the manufacturers’ instructions to use these 
instruments.
2.  A battery-operated AC milliammeter. The Data Precision 245 
digital multimeter is suitable for this job.
3.  Measuring the voltage drop across a resistor by means of a 
VOM or battery-operated AC voltmeter. The “limit” indication 
is 0.75 V, so analog meters must have an accurate low-voltage 
scale. The Simpson 250 and Sanwa SH-63Trd are examples 
of a passive VOM that is suitable. Nearly all battery operated 
digital multimeters that have a 2 V AC range are suitable.  (See 
Fig. A)
Fig. A.  Using an AC voltmeter to check AC leakage.
1.5 k
Ω
0.15 
μF
AC
voltmeter
(0.75 V)
To Exposed Metal
Parts on Set
Earth Ground
STR-K7200
3
1. 
SERVICING  NOTES
  .............................................   3
2. GENERAL
  ..................................................................   4
3. DISASSEMBLY
3-1.   Disassembly Flow  ..........................................................   9
3-2.   Case .................................................................................   9
3-3.   Back Panel Block ............................................................   10
3-4.   Front Panel Block  ..........................................................   10
3-5.   Main Block .....................................................................   11
3-6.   MAIN Board ...................................................................   11
4. 
TEST  MODE 
 ............................................................   12
5. 
ELECTRICAL  CHECK 
 .........................................   14
6. DIAGRAMS
6-1.  Block Diagram - MAIN Section - ...................................   15
6-2.  Block Diagram - HDMI Section - ...................................   16
6-3.  Block Diagram - DSP/XM Section - ..............................   17
6-4.  Block Diagram - AUDIO Section - .................................   18
6-5.  Block Diagram - POWER SUPPLY Section - ................   19
6-6.  Printed Wiring Board - MAIN Board - ...........................   21
6-7.  Schematic Diagram - MAIN Board (1/3) - .....................   22
6-8.  Schematic Diagram - MAIN Board (2/3) - .....................   23
6-9.  Schematic Diagram - MAIN Board (3/3) - .....................   24
6-10.  Schematic Diagram - DIGITAL AB Board (1/5) -..........   25
6-11.  Schematic Diagram - DIGITAL AB Board (2/5) -..........   26
6-12.  Schematic Diagram - DIGITAL AB Board (3/5) -..........   27
6-13.  Schematic Diagram - DIGITAL AB Board (4/5) -..........   28
6-14.  Schematic Diagram - DIGITAL AB Board (5/5) -..........   29
6-15. Printed Wiring Board 
 
- DIGITAL AB Board (Component Side) -.....................   30
6-16. Printed Wiring Board 
 
- DIGITAL AB Board (Conductor Side) - ......................   31
6-17.  Printed Wiring Board - XM Board - ...............................   32
6-18.  Schematic Diagram - XM Board - ..................................   33
6-19. Printed Wiring Boards 
 
- MIC/HEADPHONE Section - ......................................   34
6-20.  Schematic Diagram - MIC/HEADPHONE Section - .....   35
6-21.  Printed Wiring Board - HDMI Board (Side A) - ............   36
6-22.  Printed Wiring Board - HDMI Board (Side B) - ............   37
6-23.  Schematic Diagram - HDMI Board (1/2) - .....................   38
6-24.  Schematic Diagram - HDMI Board (2/2) - .....................   39
6-25.  Printed Wiring Boards - VIDEO Section - .....................   40
6-26.  Schematic Diagram - VIDEO Section - ..........................   41
6-27.  Printed Wiring Boards - PANEL Section - .....................   42
6-28.  Schematic Diagram - PANEL Section - ..........................   43
6-29.  Printed Wiring Board - DCDC CONVERTER Board - ..   44
6-30.  Schematic Diagram - DCDC CONVERTER Board - ....   45
6-31.  Printed Wiring Board - STANDBY Board - ...................   46
6-32.  Schematic Diagram - STANDBY Board - ......................   47
7. 
EXPLODED  VIEWS
7-1.  Front Panel Section .........................................................   65
7-2.  Back Panel Section .........................................................   66
7-3. MAIN 
Section 
.................................................................  67
8. 
ELECTRICAL  PARTS  LIST
  ..............................   68
TABLE  OF  CONTENTS
SECTION  1
SERVICING  NOTES
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)
 : LEAD  FREE  MARK
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.
NOTE  OF  REPLACING  THE  IC3511  AND  IC3513  ON  
THE  HDMI  BOARD
IC3511 and IC3513 on the HDMI board cannot exchange with sin-
gle. When IC3511 and IC3513 on the HDMI board are damaged, 
exchange the entire mounted board.
NOTE  OF  REPLACING  THE  IC1131  ON  THE  DIGITAL  
AB  BOARD
IC1131 on the DIGITAL AB board cannot exchange with single. 
When IC1131 on the DIGITAL AB board is damaged, exchange 
the entire mounted board.
STR-K7200
4
SECTION  2
GENERAL
Front panel
 
AUTO CAL MIC
SPEAKERS
(ON/OFF)
PHONES
VIDEO 2 IN/PORTABLE AV IN
VIDEO
L AUDIO   R
MEMORY/
ENTER
TUNING
MODE
TUNING
2CH
A.F.D.
MOVIE
MUSIC
AUTO CAL
MUTING
DISPLAY
INPUT MODE
INPUT SELECTOR
MASTER VOLUME
R
RT
RE
RG
RB
RH
RI
RK
Name
Function
"  / 
(on/standby)
Press to turn the receiver on
or off.
SPEAKERS 
(ON/OFF)
Press to turn the speaker
system on or off.
Display
The current status of the
selected component or a list
of selectable items appears
here.
Remote sensor Receives signals from
remote commander.
DISPLAY
Press to select information
displayed on the display.
INPUT MODE
Press to select the input
mode when the same
components are connected
to both digital and analog
jacks.
MASTER
VOLUME
Turn to adjust the volume
level of all speakers at the
same time.
MUTING
Press to turn off the sound
temporarily.
Press MUTING again to
restore the sound.
AUTO CAL
Press to activate the Auto
Calibration function.
 
Name
Function
INPUT
SELECTOR
Turn to select the input
source to play back.
2CH
Press to select a sound
field.
A.F.D.
MOVIE
MUSIC
TUNING +/–
Press to scan a station.
TUNING MODE
Press to select the tuning
mode.
MEMORY/ 
ENTER
Press to store a station or
enter the selection when
selecting the settings.
VIDEO 2 IN/
PORTABLE AV IN
jacks
Connect to a portable
audio/video component
such as a camcorder or
video game.
AUTO CAL MIC
jack
Connects to the supplied
optimizer microphone for
the Auto Calibration
function.
PHONES jack
Connects to headphones.
Receiver
This section is extracted 
from instruction manual.
Page of 84
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