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Sony STR-K402 Service Manual
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Sony STR-K402 Service Manual

Fm stereo fm-am receiver
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SERVICE MANUAL
Ver 1.0 2001. 04
Manufactured under license from Dolby Laboratories Licensing
Corporation.
"DOLBY" the double-D symbol ; "AC-3" and "Pro Logic" are
trademarks of Dolby Laboratories Licensing Corporation.
AUDIO POWER
SPECIFICATIONS
POWER OUTPUT AND
TOTAL HARMONIC
DISTORTION:
With 8 ohm loads, both
channels driven, from 40 -
20,000 Hz; rated 80 watts
per channel minimum RMS
power, with no more than
0.09% total harmonic
distortion from 250
milliwatts to rated output
Amplifier section
POWER OUTPUT
Rated Power Output at Stereo mode
(8 ohms 40 Hz - 20 kHz, THD 0.09%)
80 W + 80 W
Reference Power Output
(8 ohms 1 kHz, THD 0.7%)
1)
Front
: 80 W/ch
1)
Center
: 80 W
1)
Surround
: 80 W/ch
Sony Corporation
9-873-895-11
2001D1600-1
Home Audio Company
© 2001.4
Shinagawa Tec Service Manual Production Group
SPECIFICATIONS
1) Depending on the sound field settings and
the sources, there may be no sound output.
Frequency response
MULTI CH IN, CD,
MD/TAPE, DVD/LD,
TV/SAT, VIDEO:
20 Hz – 20 kHz
0/– 0.5 dB (sound field,
and tone bypassed)
Inputs (Analog)
MULTI CH IN, CD,
MD/TAPE, DVD/LD,
TV/SAT, VIDEO:
Sensitivity: 250 mV
Impedance:
50 kilohms
2)
S/N
: 85 dB
3)
(A, 250 mV
)
2) INPUT SHORT
3) Weighted network, input level
Inputs (Digital)
DVD/LD (coaxial):
Sensitivity: –
Impedance: 75 ohms
S/N: 100 dB
(A, 20 kHz LPF)
TV/SAT (Optical):
Sensitivity: –
STR-K402
Impedance: –
S/N: 100 dB
(A, 20 kHz LPF)
MD/TAPE (OUT):
Outputs
VIDEO (AUDIO OUT):
Voltages: 250 mV,
Impedance:
10 kilohms
SUB WOOFER:
Voltage: 2 V
Impedance :
1 kilohms
PHONES:
Accepts low– and
high-impedance
headphones
±6 dB at 100 Hz
TONE
and 10 kHz
Sampling frequency
48 kHz (OPTICAL IN)
96 kHz (COAXIAL IN)
FM tuner section
Tuning range
87.5 - 108.0 MHz
Antenna terminals
75 ohms, unbalanced
FM STEREO FM-AM RECEIVER
US Model
Intermediate
frequency
10.7 MHz
Mono: 18.3 dBf,
Sensitivity
2.2 µV/75 ohms
Stereo: 38.3 dBf,
22.5 µV/75 ohms
Usable sensitivity
11.2 dBf, 1 µV/75 ohms
Mono: 76 dB
S/N
Stereo: 70 dB
Harmonic distortion at 1 kHz
Mono: 0.3%
Stereo: 0.5%
Separation
45 dB at 1 kHz
Frequency response
30 Hz - 15 kHz
+0.5/-2 dB
Selectivity
60 dB at 400 kHz
— Continued on next page —

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  • Page 1 STR-K402 SERVICE MANUAL US Model Ver 1.0 2001. 04 Manufactured under license from Dolby Laboratories Licensing Corporation. “DOLBY” the double-D symbol ; “AC-3” and “Pro Logic” are trademarks of Dolby Laboratories Licensing Corporation. SPECIFICATIONS Impedance: – Intermediate 1) Depending on the sound field settings and AUDIO POWER the sources, there may be no sound output.
  • Page 2 STR-K402 Power consumption AM tuner section Video section 185 W Inputs Video: 1 Vp-p 75 ohms Tuning range In Standby With 10-kHz tuning Condition: Video: 1 Vp-p 75 ohms scale: Outputs 530 - 1710 kHz General With 9-kHz tuning Dimensions 430 × 145 × 298 mm scale: ×...

  • Page 3: Table Of Contents

    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.

  • Page 4: General

    STR-K402 SECTION 1 This section is extracted from instruction manual. GENERAL...
  • Page 5 STR-K402...

  • Page 6: Test Mode

    STR-K402 SECTION 2 TEST MODE SOFTWARE VERSION DISPLAY MODE FACTORY SET MODE * The software version is displayed. * All preset contents are reset to the default setting. * Procedure: * Procedure: While depressing the TUNER and the VIDEO buttons...

  • Page 7: Diagrams

    STR-K402 SECTION 3 DIAGRAMS THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this necessary note is printed in each block.) For schematic diagrams. For printed wiring boards. Note: Note: • All capacitors are in µF unless otherwise noted. pF: µµF •...

  • Page 8: Circuit Boards Location

    STR-K402 3-1. CIRCUIT BOARDS LOCATION STANDBY board VIDEO board DIGITAL board POWER SW board HP board MAIN board DISPLAY board...

  • Page 9: Block Diagram Main Section

    STR-K40 3-2. BLOCK DIAGRAM – MAIN SECTION – ANALOG SOUND PROC. — TUNER UNIT — IC201 L OUT IN G2 L OUT R OUT R-CH MUTING ANTENNA Q361 J401 CD IN IN B2 PLL DATA DATA OUT MD/TAPE OUT REC OUT 2A S DATA S DATA S CLK...

  • Page 10: Block Diagram Display Section

    STR-K402 3-3. BLOCK DIAGRAM – DISPLAY SECTION – R-CH J791 POWER AMP PHONES IC701 RY791 RELAY BOOSTER • R-CH is omitted due to same as L-CH. +V OUT2 DRIVE Q703 Q791 • Signal Path LIMITER : FM Q701 TM602 RY730...

  • Page 11: Schematic Diagram Main Section (1/3)

    STR-K40 3-4. SCHEMATIC DIAGRAM – MAIN SECTION (1/3) – • See page 20 for IC Block Diagram. IC B/D (Page 13) IC B/D IC B/D (Page 12)

  • Page 12: Schematic Diagram Main Section (2/3)

    STR-K402 3-5. SCHEMATIC DIAGRAM – MAIN SECTION (2/3) – • See page 20 for IC Block Diagram. (Page 11) (Page 13) (Page 15) (Page 15) (Page 17) IC B/D (Page 17) (Page 17)

  • Page 13: Schematic Diagram Main Section (3/3)

    STR-K40 3-6. SCHEMATIC DIAGRAM – MAIN SECTION (3/3) – (Page 17) (Page 11) (Page 12)

  • Page 14: Printed Wiring Board Main Section

    STR-K402 3-7. PRINTED WIRING BOARD – MAIN SECTION – • See page 8 for Circuit Boards Location. There are a few cases that the part printed on this diagram isn’t mounted in this model. TUNER UNIT IC 401 IC 201...

  • Page 15: Schematic Diagram Digital Section

    STR-K40 3-8. SCHEMATIC DIAGRAM – DIGITAL SECTION – • See page 20 for IC Block Diagram. • See page 7 for Waveforms. IC B/D IC B/D (Page 17)

  • Page 16: Printed Wiring Board Digital Section

    STR-K402 3-9. PRINTED WIRING BOARD – DIGITAL SECTION – • See page 8 for Circuit Boards Location. There are a few cases that the part printed on this diagram isn’t mounted in this model. DIGITAL IC 1002 IC 1003 IC 1005...

  • Page 17: Schematic Diagram Display Section

    STR-K40 3-10. SCHEMATIC DIAGRAM – DISPLAY SECTION – • See page 21 for IC Pin Function. • See page 7 for Waveforms. (Page 13) (Page 15)

  • Page 18: Printed Wiring Board Display Section

    STR-K402 3-11. PRINTED WIRING BOARD – DISPLAY SECTION – • See page 8 for Circuit Boards Location. There are a few cases that the part printed on this diagram isn’t mounted in this model. FOR FRASH PROGRAMMING (Page 16) (Page 19)

  • Page 19: Schematic Diagram Video Section

    STR-K40 There are a few cases that the part printed o this diagram isn’ t mounted in this model. 3-12. SCHEMATIC DIAGRAM – VIDEO SECTION – • See page 20 for IC Block Diagram. 3-13. PRINTED WIRING BOARD – POWER SECTION – •...

  • Page 20: Ic Block Diagrams

    STR-K402 3-15. IC BLOCK DIAGRAMS IC1015 NJM2279D (VIDEO BOARD) IC1008 AK4527 (DIGITAL BOARD) IC950 NJM2103D (STANDBY BOARD) 14 13 12 10 9 8 RESET 44 43 42 41 40 39 38 37 36 35 34 DZF2 RIN+ – + RIN–...

  • Page 21: Ic Pin Function Description

    STR-K402 3-16. IC PIN FUNCTION DESCRIPTION • IC102 MB90553ABPF-G-193-BND (SYSTEM CONTROL) Pin No. Pin Name Description Read volume encoder A changing Read volume encoder B changing BLUE LED Control Blue LED DCS LED Control DCS LED AFD LED Control AFD LED...
  • Page 22 STR-K402 Pin No. Pin Name Description — Selection of micom operation mode HSTX — Hardware standby signal RDS CLK Read RDS clock — HP SW Detect headphone switch PW KEY IN Detect power switch key SIRCS Input data from remote control receiver...

  • Page 23: Exploded Views

    STR-K402 SECTION 4 EXPLODED VIEWS NOTE: • -XX, -X mean standardized parts, so they may • The mechanical parts with no reference number The components identified by mark 0 or have some differences from the original one. in the exploded views are not supplied.

  • Page 24: Chassis Section

    STR-K402 4-2. CHASSIS SECTION not supplied not supplied not supplied not supplied not supplied T901 not supplied not supplied Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks A-2007-946-A DIGITAL BOARD,COMPLETE 3-703-244-00 BUSHING (FBS001), CORD 0 67 4-232-237-01 FOOT (DIA.

  • Page 25: Electrical Parts List

    STR-K402 SECTION 5 DIGITAL ELECTRICAL PARTS LIST NOTE: • CAPACITORS: • SEMICONDUCTORS uF: µF In each case, u: µ, for example: • Due to standardization, replacements in the uA...: µA... , uPA... , µPA... , parts list may be different from the parts •...
  • Page 26 STR-K402 DIGITAL DISPLAY Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks FB1302 1-414-813-11 FERRITE R1255 1-216-073-00 RES-CHIP 1/10W FB1303 1-414-813-11 FERRITE R1256 1-216-037-00 METAL CHIP 1/10W FB1304 1-414-813-11 FERRITE R1257 1-216-065-00 RES-CHIP 4.7K 1/10W FB1305 1-414-813-11 FERRITE...
  • Page 27 STR-K402 DISPLAY Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C125 1-162-306-11 CERAMIC 0.01uF 30.00% 16V < RESISTOR > C126 1-162-306-11 CERAMIC 0.01uF 30.00% 16V C127 1-164-159-11 CERAMIC 0.1uF R001 1-249-411-11 CARBON 1/4W C129 1-124-261-00 ELECT...
  • Page 28 STR-K402 DISPLAY MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R125 1-247-807-31 CARBON 1/4W S117 1-762-875-21 SWITCH, TACTILE (PRESET TUNING-) R126 1-247-807-31 CARBON 1/4W S118 1-762-875-21 SWITCH, TACTILE (MEMORY) R127 1-249-429-11 CARBON 1/4W S120 1-762-875-21 SWITCH, TACTILE (TUNING-)
  • Page 29 STR-K402 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C376 1-128-809-11 CERAMIC 100PF C497 1-128-803-11 CERAMIC 33PF C402 1-126-795-11 ELECT 10uF 20.00% 50V C498 1-128-803-11 CERAMIC 33PF C404 1-126-795-11 ELECT 10uF 20.00% 50V C499 1-126-795-11 ELECT 10uF 20.00% 50V...
  • Page 30 STR-K402 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks C801 1-126-947-11 ELECT 47uF 20.00% 35V D732 8-719-991-33 DIODE 1SS133T-77 C802 1-126-947-11 ELECT 47uF 20.00% 35V D734 8-719-991-33 DIODE 1SS133T-77 C803 1-165-498-11 ELECT 4700uF D735 8-719-991-33 DIODE 1SS133T-77...
  • Page 31 STR-K402 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < TRANSISTOR > Q757 8-729-900-63 TRANSISTOR BN1F4M-TP Q758 8-729-281-53 TRANSISTOR 2SC1815GR-TPE2 Q361 8-729-823-22 TRANSISTOR 2SC3576-AC Q759 8-729-900-63 TRANSISTOR BN1F4M-TP Q362 8-729-823-22 TRANSISTOR 2SC3576-AC Q791 8-729-119-79 TRANSISTOR...
  • Page 32 STR-K402 MAIN Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks R448 1-249-437-11 CARBON 1/4W R530 1-249-425-11 CARBON 4.7K 1/4W F R452 1-249-417-11 CARBON 1/4W F R531 1-249-425-11 CARBON 4.7K 1/4W F R453 1-249-417-11 CARBON 1/4W F...
  • Page 33 STR-K402 MAIN POWER SW STANDBY Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks 0 R803 R702 1-249-439-11 CARBON 1/4W 1-249-386-11 CARBON 1/6W F R703 1-249-414-11 CARBON 1/4W F R804 1-249-427-11 CARBON 6.8K 1/4W F R704 1-249-439-11 CARBON...
  • Page 34 STR-K402 STANDBY VIDEO Ref. No. Part No. Description Remarks Ref. No. Part No. Description Remarks < DIODE > C1607 1-126-960-11 ELECT 20.00% 50V C1608 1-126-960-11 ELECT 20.00% 50V D901 8-719-991-33 DIODE 1SS133T-77 C1609 1-126-960-11 ELECT 20.00% 50V D910 8-719-200-82 DIODE 11ES2-NTA1B...
  • Page 35 STR-K402 MEMO...
  • Page 36 STR-K402 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. Ver. Date Description of Revision...

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