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STR- · PDF file SERVICE MANUAL Sony Corporation Home Audio Division Published by Sony Techno Create Corporation US Model Canadian Model FM STEREO FM-AM RECEIVER 9-887-073-01 2006A1678-1

Oct 29, 2020

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  • SERVICE MANUAL

    Sony Corporation Home Audio Division Published by Sony Techno Create Corporation

    US Model Canadian Model

    FM STEREO FM-AM RECEIVER

    9-887-073-01 2006A1678-1 © 2006.01

    Ver. 1.0 2006.01

    SPECIFICATIONS

    STR-K700

    • STR-K700 is the tuner and the amplifier section in HT-DDW700.

    Manufactured under license from Dolby Laboratories. “Dolby”, “Pro Logic” and the double-D symbol are trademarks of Dolby Laboratories. “DTS” and “DTS Digital Surround” are registered trademarks of Digital Theater Systems, Inc.

    POWER OUTPUT AND TOTAL HARMONIC DISTORTION: (Models of area code US only) With 6 ohm loads, both channels driven, from 120 – 20,000 Hz; rated 85 watts per channel minimum RMS power, with no more than 0.7% total harmonic distortion from 250 milliwatts to rated output.

    Amplifier section Power Output1)

    Models of area code US (6 ohms 1 kHz, THD 10%) FRONT2) : 133 W/ch CENTER2): 133 W SUR2) : 133 W/ch (6 ohms 100 Hz, THD 10%) SUB WOOFER2): 135 W

    Models of area code Canadian (6 ohms 1 kHz, THD 0.7%) FRONT2) : 85 W/ch CENTER2): 85 W SUR2) : 85 W/ch (6 ohms 100 Hz, THD 0.7%) SUB WOOFER2): 85 W (6 ohms 1 kHz, THD 10%)

    FRONT2) : 133 W/ch CENTER2): 133 W SUR2) : 133 W/ch (6 ohms 100 Hz, THD 10%) SUB WOOFER2): 135 W

    1) Measured under the following conditions:

    2) Depending on the sound field settings and the source, there may be no sound output.

    Power requirements 120 V AC, 60 Hz

    Inputs (Analog)

    Inputs (Digital)

    Reproduction frequency range: 28 – 20,000 Hz

    Tone

    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 kHz3)

    With 9-kHz tuning scale: 531 – 1,710 kHz3)

    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 DIMMER, 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.

    SA-CD/CD, DVD, VIDEO 1, 2

    Sensitivity: 800 mV Impedance: 50 k ohms

    DVD (Coaxial) Sensitivity: – Impedance: 75 ohms

    VIDEO 2 (Optical) Sensitivity: – Impedance: –

    Gain levels ±6 dB, 1 dB step

    — Continued on next page —

  • 2

    STR-K700

    Notes on chip component replacement • Never reuse a disconnected chip component. • Notice that the minus side of a tantalum capacitor may be

    damaged 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)

    : 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 flow) 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.

    About area codes The area code of the receiver you purchased is shown on the lower right portion of the rear panel (see the illustration below).

    Any differences in operation, according to the area code, are clearly indicated in the text, for example, “Models of area code AA only”.

    CENTER FRONT LR

    LR

    + +

    Area code

    MODEL IDENTIFICATION – Rear Panel –

    Model Part No.

    US model 2-661-458-0[]

    Canadian model 2-661-458-1[]

    Parts No.

    General Power requirements

    Power consumption

    Power consumption (during standby mode) 0.2 W

    Dimensions (w/h/d) (Approx.) 17 × 5 6/8 × 12 1/8 inches including projecting parts and controls

    Mass (Approx.) 16 lb 9 oz

    120 V AC, 60 Hz

    Area code Power consumption

    US 210 W

    Canadian 290 VA

    Design and specifications are subject to change without notice.

  • 3

    STR-K700

    TABLE OF CONTENTS

    1. GENERAL ................................................................... 4

    2. TEST MODE ............................................................... 10

    3. DIAGRAMS 3-1. Block Diagram – MAIN Section – .................................. 12 3-2. Block Diagram – DISPLAY/POWER Section – ............. 13 3-3. Printed Wiring Board – DIGITAL Board (Side A) – ...... 14 3-4. Printed Wiring Board – DIGITAL Board (Side B) – ...... 15 3-5. Schematic Diagram – DIGITAL Board (1/3) – .............. 16 3-6. Schematic Diagram – DIGITAL Board (2/3) – .............. 17 3-7. Schematic Diagram – DIGITAL Board (3/3) – .............. 18 3-8. Printed Wiring Board – MAIN Board – ......................... 19 3-9. Schematic Diagram – MAIN Board (1/3) – ................... 20 3-10. Schematic Diagram – MAIN Board (2/3),

    HEADPHONE Board – ................................................... 21 3-11. Schematic Diagram – MAIN Board (3/3), ADCC Board,

    STANDBY Board – ......................................................... 22 3-12. Printed Wiring Boards

    – ADCC Board, HEADPHONE Board – ........................ 23 3-13. Printed Wiring Board – STANDBY Board – ................. 24 3-14. Printed Wiring Boards

    – DISPLAY Board, POWER Board – ............................. 25 3-15. Schematic Diagram

    – DISPLAY Board, POWER Board – ............................. 26

    4. EXPLODED VIEWS 4-1. Front Panel Section ......................................................... 34 4-2. Chassis Section ................................................................ 35

    5. ELECTRICAL PARTS LIST .................................. 36

    SAFETY CHECK-OUT After correcting the original service problem, perform the following 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 kΩ0.15 µF AC voltmeter (0.75 V)

    To Exposed Metal Parts on Set

    Earth Ground

    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.

    ATTENTION AU COMPOSANT AYANT RAPPORT À LA SÉCURITÉ!

    LES COMPOSANTS IDENTIFIÉS PAR UNE MARQUE 0 SUR LES DIAGRAMMES SCHÉMATIQUES ET LA LISTE DES PIÈCES SONT CRITIQUES POUR LA SÉCURITÉ DE FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS PUBLIÉS PAR SONY.

  • 4

    STR-K700 SECTION 1 GENERAL This section is extracted

    from instruction manual.

    Front panel

    Receiver

    ?/1

    2 6 7 8

    qf qd

    3 4 51

    qs 90qa

    Name Function A ?/1 Press to turn the receiver

    on or off.

    BDIMMER Press to adjust the brightness of the display.

    CSLEEP Press to activate the Sleep Timer function and the duration which the receiver turns off automatically.

    D 2CH Press to select 2CH STEREO mode.

    EDisplay The current status of the selected component or a list of selectable items appears here.

    FDISPLAY Press to select information displayed on the display.

    G INPUT MODE Press to select the input mode when the same components are connected to both digital and analog jacks.

    HMASTER VOLUME

    Turn to adjust the volume level of all speakers at the same time.

    I INPUT SELECTOR

    Turn to select the input source to playback.

    JRemote sensor Receives signals from remote commander.

    KMOVIE, MUSIC

    Press to select sound fields (MOVIE, MUSIC).

    LA.F.D. Pre

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