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Sony STR-K790 Service Manual
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Sony STR-K790 Service Manual

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3 7 63 1515 0
SERVICE MANUAL
Ver. 1.1 2007.03
• STR-K790 is the tuner and the amplifier section
in HT-DDW790 and HT-DDW795.
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.
** "DTS" and "DTS Digital Surround" are registered trademarks of DTS,
Inc.
TE
L 13942296513
AUDIO POWER
SPECIFICATIONS
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 1%
total harmonic distortion from 250 milliwatts
to rated output.
Amplifier section
1)
Power Output
Stereo mode (rated) (6 ohms 1 kHz, THD 1%)
85 W + 85 W
2)
Surround mode
(reference)
(6 ohms 1 kHz, THD 10%)
RMS output
FRONT:133 W
per channel
CENTER: 133 W
SURROUND: 133 W
per channel
2)
Surround mode
(reference)
(6 ohms 100 Hz, THD 10%)
SUB WOOFER: 135 W
www
.
Sony Corporation
9-887-542-02
Home Audio Division
2007C16-1
Published by Sony Techno Create Corporation
© 2007.03
http://www.xiaoyu163.com
1)
Measured under the following conditions:
Area code
US, Canadian
AEP, UK
2)
Reference power output for front, center, surround
speakers and sub woofer. Depending on the sound
field settings and the source, there may be no
sound output.
Inputs
Analog
Digital (Coaxial) Impedance: 75 ohms
Tone
Gain levels
Reproduction frequency range:
FM tuner section
Tuning range
Antenna
Antenna terminals
Intermediate frequency
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u163
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i
http://www.xiaoyu163.com
STR-K790
2 9
8
SPECIFICATIONS
Q Q
3
6 7
1 3
1 5
Power requirements
120 V AC, 60 Hz
230 V AC, 50 Hz
Sensitivity: 800 mV/
50 kohms
±6 dB, 1 dB step
28 – 20,000 Hz
87.5 - 108.0 MHz
FM wire antenna
75 ohms, unbalanced
10.7 MHz
FM STEREO/FM-AM RECEIVER
co
.
9 4
2 8
US Model
Canadian Model
AEP Model
UK Model
0 5
8
2 9
9 4
2 8
AM tuner section
Tuning range
Models of area code US, Canadian
With 10-kHz tuning scale:
530 – 1,710 kHz
With 9-kHz tuning scale:
531 – 1,710 kHz
Models of area code AEP, UK
With 9-kHz tuning scale:
531 – 1,602 kHz
Antenna
Loop antenna
Intermediate frequency
450 kHz
4)
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.
General
Power requirements
Area code
Power requirements
US, Canadian
120 V AC, 60 Hz
AEP, UK
230 V AC, 50/60 Hz
— Continued on next page —
m
9 9
9 9
4)
4)

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  • Page 1 Canadian Model Ver. 1.1 2007.03 AEP Model UK Model • STR-K790 is the tuner and the amplifier section in HT-DDW790 and HT-DDW795. This receiver incorporates Dolby* Digital and Pro Logic Surround and the DTS** Digital Surround System. * Manufactured under license from Dolby Laboratories.
  • Page 2 FONCTIONNEMENT. NE REMPLACER CES COM- POSANTS occur such as on IC pins, etc. QUE PAR DES PIÈCES SONY DONT LES NUMÉROS SONT • Usable with ordinary solder DONNÉS DANS CE MANUEL OU DANS LES SUPPLÉMENTS...

  • Page 3: Table Of Contents

    STR-K790 3 7 63 1515 0 TABLE OF CONTENTS About area codes The area code of the receiver you purchased is GENERAL ..............4 shown on the lower right portion of the rear panel (see the illustration below). TEST MODE ...............

  • Page 4: General

    STR-K790 SECTION 1 3 7 63 1515 0 GENERAL Receiver Front panel 2 3 4 MASTER VOLUME DISPLAY AUTO CAL DIMMER SLEEP INPUT SELECTOR VIDEO 1 IN/ PORTABLE AUDIO IN/ AUTO CAL MIC A.F.D. MOVIE MUSIC PHONES Name Function...
  • Page 5 STR-K790 3 7 63 1515 0 About the indicators on the display PLII MEMORY RDS ST COAX D.RANGE MONO Name Function Name Function A SW H Tuner Lights up when audio signal is Lights up when using the Indicators...
  • Page 6 STR-K790 3 7 63 1515 0 Rear panel US, Canadian models DIGITAL ANTENNA OPTICAL VIDEO 2/ BD IN COAXIAL AUDIO IN AUDIO IN AUDIO IN WOOFER SURROUND CENTER FRONT SA-CD/CD SPEAKERS SPEAKERS A DIGITAL INPUT section C AUDIO INPUT section...
  • Page 7 (on/standby) the same time to turn the TV RM-AAU013 to operate the receiver and to on or off. control the Sony audio/video components that AV ?/1 Press to turn on or off the the remote is assigned to operate. (on/standby)
  • Page 8 STR-K790 3 7 63 1515 0 Name Function Name Function D 2CH M MENU Press to select 2CH STEREO Press to display the menus of mode. the VCR, DVD player, Blu-ray disc player or satellite tuner on A.F.D. Press to select A.F.D. mode.
  • Page 9 STR-K790 3 7 63 1515 0 Name Function Name Function Q RETURN/ U Numeric Press to return to the previous Press to preset/tune to preset EXIT O menu or exit the menu while buttons stations or to select track...

  • Page 10: Test Mode

    STR-K790 SECTION 2 3 7 63 1515 0 TEST MODE SOUND FIELD CLEAR MODE SWAP ALL MODE The preset sound field is cleared when this mode is activated. Use The signal will be swapped to all channels so that all speakers will this mode before returning the product to clients upon completion have sound output.
  • Page 11 STR-K790 3 7 63 1515 0 DCAC FACTORY TEST MODE DCAC Factory Test mode have two stages: 1. DCAC DSP Data Line Checking 2. DCAC board Checking Start Pass Pass DSP Data Line Auto Cal Mic Check Check Factory Test System Setup...

  • Page 12: Electrical Adjustment

    STR-K790 Ver. 1.1 SECTION 3 3 7 63 1515 0 ELECTRICAL ADJUSTMENT TUNER SECTION [FM Auto Stop Check] generator OUT (75 Ω ) Procedure: 1. Turn the power on. 2. Input the following signal from Signal Generator to FM antenna input directly.

  • Page 13: Diagrams

    STR-K790 SECTION 4 3 7 6 3 1 5 1 5 0 DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. • Circuit Boards Location (In addition to this, the necessary note is printed in each block.) For Schematic Diagrams.

  • Page 14: Block Diagram - Main Section

    STR-K790 4-1. BLOCK DIAGRAM – MAIN SECTION – 3 7 6 3 1 5 1 5 0 DISPLAY AUTO CAL MIC /POWER SECTION (Page 15) IC400 ANALOG SOUND PROCESSOR J2000 VIDEO 1 IN/ R-CH PORTABLE AUDIO IN/ INL5 AVCC...

  • Page 15: Block Diagram - Display/Power Section

    STR-K790 4-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION – 3 7 6 3 1 5 1 5 0 • R-CH is omitted due to same as L-CH. IC501 POWER AMP • Signal Path Q503 R-CH +V OUT2 BOOSTER Q507 Q501,502...

  • Page 16: Printed Wiring Board - Digital Board (Side A)

    STR-K790 4-3. PRINTED WIRING BOARD – DIGITAL BOARD (SIDE A) – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 DIGITAL BOARD (SIDE A) R1253 R1318 R1321 FB1350...

  • Page 17: Printed Wiring Board - Digital Board (Side B)

    STR-K790 4-4. PRINTED WIRING BOARD – DIGITAL BOARD (SIDE B) – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 DIGITAL BOARD (SIDE B) AEP,UK HDMI BRIDGE BOARD...

  • Page 18: Schematic Diagram - Digital Board (1/5)

    STR-K790 4-5. SCHEMATIC DIAGRAM – DIGITAL BOARD (1/5) – • See page 13 for Waveform. • See page 35 for IC Block Diagram. 3 7 6 3 1 5 1 5 0 DIGITAL BOARD (1/5) AEP,UK CNS509 DIGITAL CL013...

  • Page 19: Schematic Diagram - Digital Board (2/5)

    STR-K790 4-6. SCHEMATIC DIAGRAM – DIGITAL BOARD (2/5) – • See page 13 for Waveform. • See page 36 for IC Block Diagram. 3 7 6 3 1 5 1 5 0 DIGITAL BOARD DIGITAL BOARD (4/5) (5/5) (Page 21)

  • Page 20: Schematic Diagram - Digital Board (3/5)

    STR-K790 4-7. SCHEMATIC DIAGRAM – DIGITAL BOARD (3/5) – • See page 35, 36 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 DIGITAL BOARD (1/5) (Page 18) DIGITAL BOARD (3/5) TUNER_L TUNER_R FB1503 R1556...

  • Page 21: Schematic Diagram - Digital Board (4/5)

    STR-K790 4-8. SCHEMATIC DIAGRAM – DIGITAL BOARD (4/5) – 3 7 6 3 1 5 1 5 0 MAIN BOARD STANDBY (3/4) BOARD CNP504 CNP801 (Page 29) (Page 28) CNP506 CNP505 IC1904 DIGITAL BOARD (4/5) +3.3V REG CL025 IC1904...

  • Page 22: Schematic Diagram - Digital Board (5/5)

    STR-K790 4-9. SCHEMATIC DIAGRAM – DIGITAL BOARD (5/5) – • See page 13 for Waveform. • See page 39 for IC Pin Function Description. 3 7 6 3 1 5 1 5 0 DIGITAL BOARD (4/5) (Page 21) 93 94 95...

  • Page 23: Printed Wiring Boards - Hdmi Sw Board

    STR-K790 4-10. PRINTED WIRING BOARDS – HDMI SW BOARD, HDMI BRIDGE BOARD (AEP, UK only) – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 AEP,UK HDMI SW BOARD...

  • Page 24: Schematic Diagram - Hdmi Sw Board

    STR-K790 4-11. SCHEMATIC DIAGRAM – HDMI SW BOARD, HDMI BRIDGE BOARD (AEP, UK only) – • See page 37 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 AEP,UK HDMI SW BOARD R5027 R5047 R5068...

  • Page 25: Printed Wiring Board - Main Board

    STR-K790 Ver. 1.1 4-12. PRINTED WIRING BOARD – MAIN BOARD – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 SPEAKERS SPEAKERS IMPEDANCE USE 6-16 IMPEDANCE USE 6-16...

  • Page 26: Printed Wiring Board - Standby Board

    STR-K790 4-13. PRINTED WIRING BOARD – STANDBY BOARD – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 STANDBY BOARD T901 POWER TRANSFORMER MAIN BOARD CNP907 (Page 25)

  • Page 27: Schematic Diagram - Main Board (1/4)

    STR-K790 4-14. SCHEMATIC DIAGRAM – MAIN BOARD (1/4) – • See page 36 for IC Block Diagram. 3 7 6 3 1 5 1 5 0 C421 C431 C432 C422 C424 CNP733 R401 C434 CC01 100P DCAC (Page 30)

  • Page 28: Schematic Diagram - Main Board

    STR-K790 4-15. SCHEMATIC DIAGRAM – MAIN BOARD (2/4), STANDBY BOARD – 3 7 6 3 1 5 1 5 0 (Page 29) D811 D5SBA20-4003 C811 0.22 T901 POWER C813 TRANSFORMER 4700 CNP907 D802 HZ5.6BP-TK C812 C807 0.22 C814 R803 4700 -21.4...

  • Page 29: Schematic Diagram - Main Board (3/4)

    STR-K790 4-16. SCHEMATIC DIAGRAM – MAIN BOARD (3/4) – 3 7 6 3 1 5 1 5 0 (Page 30) IC701 STK350-530T-E POWER AMP Q701,Q702,Q751,Q752 LIMITER Q705,Q706,Q755,Q756 CURRENT DETECT R700 C711 R708 500V Q703 C754 C753 MN2488-OPY-MK C701 100p...

  • Page 30: Schematic Diagram - Main Board (4/4)

    STR-K790 Ver. 1.1 4-17. SCHEMATIC DIAGRAM – MAIN BOARD (4/4) – 3 7 6 3 1 5 1 5 0 Q503,Q504,Q553,Q554, Q603,Q604,Q653,Q654 BOOSTER Q503 MN2488-OPY-MK C511 Q501,Q502,Q551,Q552, Q505,Q506,Q555,Q556, Q601,Q602,Q651,Q652 Q605,Q606,Q655,Q656 LIMITER 500V CURRENT DETECT Q507 Q501 2SC1815 GR-TPE2 R508...

  • Page 31: Printed Wiring Board - Display Board

    STR-K790 4-18. PRINTED WIRING BOARD – DISPLAY BOARD – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 DISPLAY BOARD CL125 CN101 R198 R199 CL103 POWER CL128 BOARD...

  • Page 32: Schematic Diagram - Display Board

    STR-K790 4-19. SCHEMATIC DIAGRAM – DISPLAY BOARD – • See page 38 for IC Block Diagrams. 3 7 6 3 1 5 1 5 0 DISPLAY BOARD CN104 FL101 FLUORESCENT INDICATOR TUBE -20V MAIN CL119 BOARD (2/4) CNP908 (Page 28)

  • Page 33: Printed Wiring Boards - Power Board, Dcac Board, Headphone Board

    STR-K790 4-20. PRINTED WIRING BOARDS – POWER BOARD, DCAC BOARD, HEADPHONE BOARD – • See page 13 for Circuit Boards Location. :Uses unleaded solder. 3 7 6 3 1 5 1 5 0 DCAC BOARD POWER BOARD J2000 VIDEO 1 IN/...

  • Page 34: Schematic Diagram - Power Board, Dcac Board, Headphone Board

    STR-K790 4-21. SCHEMATIC DIAGRAM – POWER BOARD, DCAC BOARD, HEADPHONE BOARD – 3 7 6 3 1 5 1 5 0 HEADPHONE BOARD DCAC BOARD CN2001 CL2002 JW2010 MAIN BOARD PORT_R (CNP733) CNP790 (1/4) PORT_GND (CNP733) CL2001 JW2011 CNP733...
  • Page 35 STR-K790 3 7 63 1515 0 • IC Block Diagrams – DIGITAL Board – IC1301 LC89056W-E AUDIO C BIT PA/PB DETECT DETECT EMPHA SAMPLING FREQUENCY MICROCOMPUTER INTERFACE XSEL LOCK XOUT CLOCK DETECT XMCK 19 DVDD MODE0 MODE 18 DGND...
  • Page 36 STR-K790 3 7 63 1515 0 – DIGITAL Board – IC1452 PCM1602APT IC1503 TC7WH157FU 31 30 36 35 34 33 VCC3 FUNCTION AGND3 CONTROL VCC4 INTERFACE AGND4 SYSTEM SCKI SYSTEM CLOCK CLOCK SCKO MANAGER OUTPUT AMP VOUT8 AND LPF...
  • Page 37 STR-K790 3 7 63 1515 0 – HDMI SW Board – IC5001 TMDS341PFCR S1 21 HPD1 S2 22 S3 23 GND 24 (3.3V) Y4 25 TMDS Rx w/ Drive 3-to-1 MUX VCC 27 Rx w/ TMDS Drive GND 30...
  • Page 38 STR-K790 3 7 63 1515 0 – DISPLAY Board – IC100 PT6315 Grid driver Multiplexed driver SEG19/GRID10 Command decoder LED1 SEG18/GRID11 LED2 Display memory LED3 SEG17/GRID12 24 bits x 12 words LED4 Timing generator key scan DOUT SEG16/KS16 L 13942296513...
  • Page 39 STR-K790 3 7 63 1515 0 • IC Pin Function Description DIGITAL BOARD IC1101 MB90F045PF-G-9033-SPE1 (SYSTEM CONTROLLER) Pin No. Pin Name Description DATAO Audio data signal input from DIR GP9 signal input from DSP BST signal output to DSP...
  • Page 40 STR-K790 3 7 63 1515 0 Pin No. Pin Name Description TUNER CLK Tuner clock signal output TUNER DATA Tuner data signal output STOP AC off detect signal input Operation mode setting input Operation mode setting input Operation mode setting input...
  • Page 41 STR-K790 3 7 63 1515 0 Pin No. Pin Name Description Clock signal output to DIR Chip enable signal output to DIR Data signal output to DIR Data signal input from DIR ERROR PLL error muting signal input from DIR...

  • Page 42: Exploded Views

    STR-K790 SECTION 5 3 7 63 1515 0 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or may have some difference from the original are seldom required for routine service.

  • Page 43: Chassis Section

    STR-K790 Ver. 1.1 3 7 63 1515 0 5-2. CHASSIS SECTION Q554 Q553 Q654 Q604 Q503 Q504 Q754 supplied Q653 Q703 Q603 supplied Q753 Q704 supplied supplied F901 supplied T901 supplied L 13942296513 Ref. No. Part No. Description Remark Ref.

  • Page 44: Electrical Parts List

    STR-K790 SECTION 6 DCAC DIGITAL 3 7 63 1515 0 ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • CAPACITORS uF: µF When indicating parts by reference number, parts list may be different from the parts please include the board name.
  • Page 45 STR-K790 DIGITAL 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C1510 1-100-566-91 CERAMIC CHIP 0.1uF C1172 1-162-974-11 CERAMIC CHIP 0.01uF C1253 1-162-960-11 CERAMIC CHIP 220PF C1511 1-100-566-91 CERAMIC CHIP 0.1uF...
  • Page 46 1/10W IC1301 8-759-825-15 IC LC89056W-E (US, CND) IC1303 8-759-096-87 IC TC7WU04FU (TE12R) R1096 1-216-833-11 METAL CHIP 1/10W IC1351 6-600-466-01 IC TORX147L (SONY) R1105 1-216-833-11 METAL CHIP 1/10W (DIGITAL/OPTICAL/VIDEO 2,BD IN) R1106 1-216-809-11 METAL CHIP 1/10W IC1401 6-707-608-01 IC PCM1803DBR R1107 1-216-825-11 METAL CHIP 2.2K...
  • Page 47 STR-K790 DIGITAL 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R1411 1-216-817-11 METAL CHIP 1/10W R1179 1-216-833-11 METAL CHIP 1/10W R1180 1-216-833-11 METAL CHIP 1/10W R1425 1-216-864-11 SHORT CHIP R1181...
  • Page 48 STR-K790 DIGITAL DISPLAY HDMI SW 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R119 1-247-807-31 CARBON 1/4W < NETWORK RESISTOR > 0 R121 1-249-393-11 CARBON 1/4W F RB1500 1-233-576-11 RES, CHIP NETWORK...
  • Page 49 STR-K790 HDMI SW HDMI_BRIDGE HEADPHONE MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark HEADPHONE BOARD < COIL > ***************** L5013 1-400-862-11 BEAD, FERRITE < CONNECTOR > < RESISTOR >...
  • Page 50 STR-K790 MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C754 1-101-810-00 CERAMIC 100PF 500V C556 1-107-583-11 CERAMIC 0.25PF 500V C557 1-104-658-91 ELECT 100uF C558 1-126-947-11 ELECT 47uF C756 1-107-583-11 CERAMIC 0.25PF 500V...
  • Page 51 STR-K790 Ver. 1.1 MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < JACK > < CONNECTOR > CNP501 1-573-847-11 CONNECTOR, BOARD TO BOARD (PLUG) 15P J400 1-774-411-11 JACK, PIN 6P...
  • Page 52 STR-K790 MAIN 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R593 1-247-874-11 CARBON 1/4W R454 1-247-831-91 CARBON 1/4W R471 1-249-415-11 CARBON 1/4W R472 1-247-831-91 CARBON 1/4W R594 1-247-863-91 CARBON 1/4W...
  • Page 53 STR-K790 MAIN POWER 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R858 1-215-890-11 METAL OXIDE R705 1-249-421-11 CARBON 2.2K 1/4W R706 1-249-440-11 CARBON 1/4W R707 1-249-414-11 CARBON 1/4W R881 1-247-871-91 CARBON...
  • Page 54 STR-K790 Ver. 1.1 STANDBY 3 7 63 1515 0 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RELAY > A-1221-175-A STANDBY BOARD, COMPLETE (US, CND) A-1221-176-A STANDBY BOARD, COMPLETE (AEP, UK) 0 RY901 1-755-439-11 RELAY ************************ <...
  • Page 55 STR-K790 3 7 63 1515 0 MEMO L 13942296513 u163 http://www.xiaoyu163.com...
  • Page 56 STR-K790 3 7 63 1515 0 REVISION HISTORY Clicking the version allows you to jump to the revised page. Also, clicking the version at the upper right on the revised page allows you to jump to the next revised page.

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