Sony str k 7200 service manual

Page 1

srmozoo

SERIflCE IVANIAL

Ver. 1.0 2008.02

US Model

- STR-K7200 is the receiver section in HT-7200DH.

Thrs receiver lncorporatcs Dolby» Digrtal and Pro Logic Surround and the MSH Drgrrnl Surround System

6 Milnufuclured under license from Dolby Laboratories, Dolby. Pro Logrc, and the douhle-D symbol are
trademarks of Dolby Laboratories,

M Milnufaclured under lrcense under us. Patent it's: 5.451.942. 5.956.674. 5.974.330; 5.978762. 6.487535
& other us. and worldwide patents issued & pcndrng. DTS and DTS Digrtal Surround are regrsrered
trademarks and the DTS logos and Symbol are trademarks otDTS. inc. © 1995-2007 DTS. Inc.

All Rrghts Reserved

This receiver rncorporares High-Derrnirion Multimedia 1nrerrace (HDMIm) techrrology.11DM1. the HDMI logo

and High-Definition Multimedia Interface are trademarks or registered trademarks or IIDMI Licensing LLC

The XM name and related logo are registered tradenrarks of XM Satellite Radro inc. All rrglrts reserved,

"x v.Colm" and --x.v,Color" logo are trademarks or Sony Corporation

"BRAVIA" and B RAV l A are tr adenrarks of Sony Corporarron.

SPECIFICATIONS
AUDIO POWER

l)Measured under 120 v AC, 60 Hz

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

Stereo mode (rated)

(6 ohms 1 kHz. Tm) 1%)
90 W + 90 W

Surround mode (reference)

(6 ohms 1 kHz. THD 10%)
RMS Outputz)
FRONT: 140 W
per channel
CENTER: 140 W
SURROUND: 140 W
per channel

9-887-947-01

© 2008.02

Sony Corporation
2008805-1 Audio Business Gourp
Published by Sony Techno Create Corporation

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 WI kohm
Tone

Gain levels 16 dB. 1 dB step
Reproduction frequency range
23 7 20,000 Hz

FM tuner section
Tuning range 87.5 7 108.0 MHz
Antenna FM wire antenna
Antenna terminals 75 ohms. unbalanced
Intermediate frequency

107 MHz

AM tuner section
Tuning range
With 10ekHz tuning scale:
53071.710 kHz
With 9ekHz tuning scale:
531 7 1.710 kHz

Antenna Loop antenna
[intermediate frequency
450 kHz

3You can change the AM tumng scale to 9 kHz or
10 kHz. After trrning in any AM station. turn off
the receiver. While holding down TUNING
MODE. press I/i'). All preset srations will be
erased when you change rhe tuning scale. To reset
the scale to 10 kHz (or 9 kHz), repeat the
procedure.

Video section

Inputs/Outputs
video: 1 Vprp. 75 ohms
COMPONENT VIDEO:

Y: 1 Vprp, 75 ohms
ps/cs: 0.7 Vprp, 75 ohms
Pr/Cr: 0.7 Vprp. 75 ohms
80 MHz HD Pass Through

- Continued on next page -

ML'II OMELAV RECEIIER

SONY;

Page 2

STR-K7200

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 X 61/4 x12 5/8 inches
(430 x 157.5 X 31% mm)
including projecting pans
and controls

Mass (Approx.) 17 lb 4 oz (7.3 kg)

Design and specifications are subject to
change without notice.

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 chasi must not exceed 0.5 mA (500 microamperes.).

Leakage current can be measured by any one of three methods.

I. Acommercial leakage tester, such as the Simpson 229 or RCA
WTA540A. 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 batteryeoperated 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)

To Exposed Metal
Parts on Set
AC
0.15 uF g 1.5 kg / voltmeter
(0. 75 V)

_T_ Earth Ground
Fig. A. Using an AC voltmeter to check AC leakage.

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-RELATED COMPONET WARNING!

COMPONENTS IDENTIFIED BY MARKAOR DOTTED LINE
WITH MARKAON 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.