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STR-K402

US Model

SERVICE MANUAL

FM STEREO FM-AM RECEIVER

— Continued on next page —

SPECIFICATIONS

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.

Outputs

MD/TAPE (OUT):
VIDEO (AUDIO OUT):
Voltages:  250 mV,
Impedance:
10 kilohms
SUB WOOFER:
Voltage: 2 V
Impedance :
1 kilohms
PHONES:
Accepts low– and
high-impedance
headphones

TONE

±

6 dB at 100 Hz

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

Intermediate

frequency

10.7 MHz

Sensitivity

Mono:  18.3 dBf,

2.2 

µ

V/75 ohms

Stereo:  38.3 dBf,

22.5 

µ

V/75 ohms

Usable sensitivity

11.2 dBf, 1 

µ

V/75 ohms

S/N

Mono:  76 dB
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

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%)

Front

1)

: 80 W/ch

Center

1)

: 80 W

Surround

1)

: 80 W/ch

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
S/N

2)

:  85 dB

(A, 250 mV

3)

)

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:  –

Impedance:  –
S/N:  100 dB
(A, 20 kHz LPF)

Sony Corporation

Home Audio Company

Shinagawa Tec Service Manual Production Group

9-873-895-11

2001D1600-1

© 2001.4

Summary of Contents for STR-K402 - Fm Stereo/fm-am Receiver

Page 1: ...5 2 dB Selectivity 60 dB at 400 kHz 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 Refe...

Page 2: ...ed when you change the tuning scale To reset the scale to 10 kHz or 9 kHz repeat the procedure Video section Inputs Video 1 Vp p 75 ohms Outputs Video 1 Vp p 75 ohms General System Tuner section PLL quartz locked digital synthesizer system Preamplifier section Low noise NF type equalizer Power amplifier section Pure complementary SEPP Power requirements 120 V AC 60 Hz Power consumption 185 W In St...

Page 3: ...ing the voltage drop across a resistor by means of a VOM or battery operatedAC 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 2V AC range are suitable See Fig A SAFETY CHECK OUT To Exposed Metal Parts on Set...

Page 4: ...4 STR K402 SECTION 1 GENERAL This section is extracted from instruction manual ...

Page 5: ...5 STR K402 ...

Page 6: ...D buttons simultaneously press the power 1 button again The message FACTORY appears and the present contents are reset to the default values SOUND FIELD CLEAR MODE The preset sound field is cleared when this mode is activated Use this mode before returning the product to clients upon completion of repair Procedure While depressing the SOUND FIELD MODE button press the power 1 button to turn on the...

Page 7: ...nput impedance 10 MΩ Voltage variations may be noted due to normal production tolerances Waveforms are taken with a oscilloscope Circled numbers refer to waveforms Signal path F FM f CD THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS In addition to this necessary note is printed in each block Waveform DISPLAY BOARD DIGITAL BOARD C B These are omitted E Q B These are omitted C ...

Page 8: ...8 STR K402 3 1 CIRCUIT BOARDS LOCATION STANDBY board POWER SW board HP board DISPLAY board MAIN board VIDEO board DIGITAL board ...

Page 9: ...C1003 1 7 IC1005 X1101 12 288MHz 6 2 IC1005 AUDIO DSP IC1006 SDIA1 85 SDIA0 84 SO 67 SI 68 SCK 69 CS 66 CSB 65 IC 62 XI 8 DSP SO 47 SBOB0 46 SBOB1 45 SBOB2 SDBCK0 83 SDWCK0 82 DSP SI DSP CLK DSP CS DSP CSB DSP IC 3 5 IC1005 IC1007 SRAM AUDIO CODEC IC1008 MCLK 39 CDT1 43 CCLK 42 DIF0 CSN 41 DFS 11 PDN 17 SMUTE 3 CODEC CDT1 27 L OUT1 BCK 4 LRCK 5 SDTO 9 SDTI1 6 SDTI2 7 SDTI3 8 CODEC CLK CODEC CS COD...

Page 10: ...L B 2 PW KEY IN 56 S150 77 RESET 47 STOP 57 SIRCS REMOTE CONTROL RECEIVER 2 1 IC101 POWER CONTROL IC950 5 8 3 6 5 6V REG Q951 D110 D109 D910 913 AC IN T902 F901 RY901 D915 D914 RELAY DRIVE Q901 D820 823 84 VCC 23 VCC 7V REG 3 2 7V REG 3 1 5V REG 3 1 5V REG 3 1 5V REG 3 1 AUDIO 5V LED 5V AUDIO 7V AUDIO 7V TUNER RDS VIDEO 5V IC807 IC803 IC804 IC801 IC802 POWER RY 8 RELAY B 12V REG 3 1 TUNER 12V IC80...

Page 11: ...11 11 STR K402 3 4 SCHEMATIC DIAGRAM MAIN SECTION 1 3 See page 20 for IC Block Diagram IC B D IC B D IC B D Page 13 Page 12 ...

Page 12: ...12 12 STR K402 3 5 SCHEMATIC DIAGRAM MAIN SECTION 2 3 See page 20 for IC Block Diagram IC B D Page 15 Page 15 Page 17 Page 17 Page 17 Page 11 Page 13 ...

Page 13: ...13 13 STR K402 3 6 SCHEMATIC DIAGRAM MAIN SECTION 3 3 Page 17 Page 12 Page 11 ...

Page 14: ... F 13 D820 E 12 D821 E 12 D822 E 12 D823 E 12 D824 E 12 D825 E 13 D826 E 13 D827 E 12 D833 D 7 D896 D 6 D898 F 11 D899 F 12 IC201 D 4 IC401 C 7 IC402 E 2 IC403 F 1 IC404 E 1 IC501 E 4 IC701 E 6 IC702 E 7 IC801 D 8 IC802 D 8 IC803 D 8 IC804 D 11 IC806 D 9 IC807 D 8 Q361 E 5 Q362 E 6 Q363 E 3 Q364 E 5 Q365 E 7 Q366 E 8 Q379 F 2 Q501 F 3 Q502 G 3 Q503 G 3 Q504 G 4 Q505 G 4 Q506 F 3 Q507 F 4 Q509 F 4 ...

Page 15: ...15 15 STR K402 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: ...1 12 13 24 25 48 37 36 CNS103 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 D1101 C 7 D1201 D 3 D1202 D 3 D1301 B 3 IC1002 A 2 IC1003 B 5 IC1004 B 7 IC1005 B 8 Ref No Location Semiconductor Location Ref No Location IC1006 C 7 IC1007 E 7 IC1008 D 6 IC1009 C 3 IC1010 B 3 IC1011 E 1 IC1013 B 3 IC1201 E 6 IC1251 E 5 ...

Page 17: ...17 17 STR K402 3 10 SCHEMATIC DIAGRAM DISPLAY SECTION See page 21 for IC Pin Function See page 7 for Waveforms Page 13 Page 15 ...

Page 18: ...3 22 11 12 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 Ref No Location D002 E 7 D003 E 6 D004 E 6 D007 D 6 D008 C 8 D009 D 7 D010 D 9 D011 A 9 D014 B 5 D100 C 12 D101 A 6 D102 A 8 D103 C 6 D109 B 12 D110 B 12 IC101 B 13 IC102 B 7 IC103 B 10 Q008 D 12 Q009 C 5 Q100 A 8 Q101 A 7 Q103 D 3 Q104 D 3 Semiconductor Locatio...

Page 19: ...RINTED WIRING BOARD POWER SECTION Page 14 Page 18 Page 14 IC 950 See page 8 for Circuit Boards Location 3 14 PRINTED WIRING BOARD VIDEO SECTION Page 14 Page 18 IC 1015 IC 1014 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 ...

Page 20: ...OUT1 LOUT1 ROUT2 LOUT2 ROUT3 LOUT3 DEM1 DEM0 TVDD DVDD DVSS PDN ICKS2 ICKS1 ICKS0 CAD1 CAD0 SDOS I2C SMUTE BICK LRCK SDTI1 SDTI2 SDTI3 SDTO DAUX DFS IC1015 NJM2279D VIDEO BOARD VIN3 V 14 SW2 13 VIN1 12 MUTE1 11 VOUT1 10 NC 9 V 8 1 SW1 2 AMP VIN2 3 MUTE2 4 VOUT2 5 GND2 6 GND1 7 AMP IC950 NJM2103D STANDBY BOARD 1 2 3 4 5 6 7 8 V VSB SESIN VSA RESET GND OUTC VSC CR VREF Q R S IC1004 LC89055W RA8 DIGI...

Page 21: ...Read volume encoder B changing Control Blue LED Control DCS LED Control AFD LED Control 2CH LED Control MODE LED Control power relay Control front speaker relay Ground Control center speaker relay Control woofer relay Control rear speaker relay Control headphone relay Output data signal to FL tube driver Output clock signal to FL tube driver Output latch signal to FL tube driver Input FLASH 1 sign...

Page 22: ...te control receiver Detect protector status Output latch signal to tuner Output data signal to tuner Output clock signal to tuner Input tuner freq data Mute tuner during scanning Tuner has tuned to a freq Tuned freq has stereo Output clock signal to CODEC Output Control Data signal to CODEC Output DFS mode signal to CODEC Output Power Down signal to CODEC Output Soft Muting signal to CODEC Output ...

Page 23: ... specified Color Indication of Appearance Parts Example KNOB BALANCE WHITE RED Parts of Color Cabinet s Color not supplied Chassis section 6 6 6 5 7 3 4 4 8 4 4 2 1 2 1 Ref No Part No Description Remarks Ref No Part No Description Remarks 1 4 232 113 01 KNOB VOL BLACK 1 4 232 113 11 KNOB VOL SILVER 2 X 4953 890 1 FRONT PANEL ASSY BLACK 2 X 4953 891 1 FRONT PANEL ASSY SILVER 3 1 681 429 11 HP BOARD...

Page 24: ...15 CORE 60 3 905 609 01 SCREW TRANSISTOR 61 1 693 407 21 TUNER UNIT 62 4 235 014 01 BACK PANEL 64 1 681 428 11 VIDEO BOARD 66 3 703 244 00 BUSHING FBS001 CORD 067 1 783 820 11 CORD POWER 69 4 921 941 01 CUSHION 70 3 701 748 00 CLAMP 0T901 1 435 313 11 TRANSFORMER POWER 1 7 685 646 79 SCREW BVTP 3X8 TYPE2 IT 3 2 7 685 645 79 SCREW BVTP 3X6 TYPE2 N S 3 7 685 880 09 SCREW BVTT 4X6 S Ref No Part No De...

Page 25: ...19 11 CERAMIC CHIP 0 1uF 50V C1229 1 104 664 11 ELECT 47uF 20 00 25V C1230 1 165 319 11 CERAMIC CHIP 0 1uF 50V C1231 1 126 964 11 ELECT 10uF 20 00 50V C1232 1 126 935 11 ELECT 470uF 20 00 6 3V C1233 1 126 960 11 ELECT 1uF 20 00 50V C1251 1 126 965 11 ELECT 22uF 20 00 50V C1252 1 165 319 11 CERAMIC CHIP 0 1uF 50V C1253 1 126 964 11 ELECT 10uF 20 00 50V C1254 1 106 347 00 MYLAR 1500PF 5 200V C1271 1...

Page 26: ... 10W R1251 1 216 073 00 RES CHIP 10K 5 1 10W R1252 1 216 059 00 METAL CHIP 2 7K 5 1 10W R1253 1 216 037 00 METAL CHIP 330 5 1 10W R1254 1 216 073 00 RES CHIP 10K 5 1 10W R1255 1 216 073 00 RES CHIP 10K 5 1 10W R1256 1 216 037 00 METAL CHIP 330 5 1 10W R1257 1 216 065 00 RES CHIP 4 7K 5 1 10W R1258 1 216 065 00 RES CHIP 4 7K 5 1 10W R1301 1 216 073 00 RES CHIP 10K 5 1 10W R1302 1 216 025 11 RES CHI...

Page 27: ... 413 11 CARBON 470 5 1 4W F R003 1 249 415 11 CARBON 680 5 1 4W F R004 1 249 417 11 CARBON 1K 5 1 4W F R005 1 249 419 11 CARBON 1 5K 5 1 4W F R006 1 249 421 11 CARBON 2 2K 5 1 4W F R007 1 247 843 11 CARBON 3 3K 5 1 4W R008 1 249 425 11 CARBON 4 7K 5 1 4W F R011 1 249 411 11 CARBON 330 5 1 4W R012 1 249 413 11 CARBON 470 5 1 4W F R013 1 249 415 11 CARBON 680 5 1 4W F R014 1 249 417 11 CARBON 1K 5 1...

Page 28: ...1 SWITCH TACTILE MENU S107 1 762 875 21 SWITCH TACTILE MENU S110 1 762 875 21 SWITCH TACTILE MENU S111 1 762 875 21 SWITCH TACTILE MENU S112 1 762 875 21 SWITCH TACTILE AM S113 1 762 875 21 SWITCH TACTILE FM S114 1 762 875 21 SWITCH TACTILE FM MODE S115 1 762 875 21 SWITCH TACTILE SHIFT S116 1 762 875 21 SWITCH TACTILE PRESET TUNING S117 1 762 875 21 SWITCH TACTILE PRESET TUNING S118 1 762 875 21 ...

Page 29: ...F 5 50V C494 1 128 803 11 CERAMIC 33PF 5 50V C495 1 128 803 11 CERAMIC 33PF 5 50V C496 1 128 803 11 CERAMIC 33PF 5 50V C497 1 128 803 11 CERAMIC 33PF 5 50V C498 1 128 803 11 CERAMIC 33PF 5 50V C499 1 126 795 11 ELECT 10uF 20 00 50V C501 1 126 963 11 ELECT 4 7uF 20 00 50V C502 1 128 809 11 CERAMIC 100PF 5 50V C503 1 102 989 00 CERAMIC 68PF 5 00 500V C504 1 102 989 00 CERAMIC 68PF 5 00 500V C505 1 1...

Page 30: ...DE 1SS133T 77 D725 8 719 991 33 DIODE 1SS133T 77 D726 8 719 991 33 DIODE 1SS133T 77 D727 8 719 991 33 DIODE 1SS133T 77 D728 8 719 991 33 DIODE 1SS133T 77 D731 8 719 991 33 DIODE 1SS133T 77 D732 8 719 991 33 DIODE 1SS133T 77 D734 8 719 991 33 DIODE 1SS133T 77 D735 8 719 991 33 DIODE 1SS133T 77 D757 8 719 991 33 DIODE 1SS133T 77 D791 8 719 991 33 DIODE 1SS133T 77 D801 8 719 934 21 DIODE HZS30 1LTA 0...

Page 31: ...ISTOR 2SA1115TP EF Q752 8 729 141 30 TRANSISTOR 2SC3623ATP LK 0Q753 8 749 010 25 TRANSISTOR MN2488 OPY M 0Q754 8 749 010 26 TRANSISTOR MP1620 OPY M Q755 8 729 140 82 TRANSISTOR 2SA988TP PAFAEA Q756 8 729 140 82 TRANSISTOR 2SA988TP PAFAEA Q757 8 729 900 63 TRANSISTOR BN1F4M TP Q758 8 729 281 53 TRANSISTOR 2SC1815GR TPE2 Q759 8 729 900 63 TRANSISTOR BN1F4M TP Q791 8 729 119 79 TRANSISTOR 2SC2785TP F...

Page 32: ...47 850 11 CARBON 6 2K 5 1 4W R522 1 249 419 11 CARBON 1 5K 5 1 4W F 0R528 1 249 386 11 CARBON 2 7 5 1 6W F R529 1 247 866 11 CARBON 30K 5 1 4W R530 1 249 425 11 CARBON 4 7K 5 1 4W F R531 1 249 425 11 CARBON 4 7K 5 1 4W F R532 1 249 425 11 CARBON 4 7K 5 1 4W F R533 1 249 437 11 CARBON 47K 5 1 4W R535 1 249 431 11 CARBON 15K 5 1 4W R539 1 249 422 11 CARBON 2 7K 5 1 4W F R540 1 247 881 00 CARBON 120K...

Page 33: ...ON 4 7K 5 1 4W F R771 1 247 850 11 CARBON 6 2K 5 1 4W R772 1 249 419 11 CARBON 1 5K 5 1 4W F R775 1 249 422 11 CARBON 2 7K 5 1 4W F R776 1 249 431 11 CARBON 15K 5 1 4W R777 1 247 866 11 CARBON 30K 5 1 4W R778 1 249 431 11 CARBON 15K 5 1 4W R779 1 249 437 11 CARBON 47K 5 1 4W R791 1 215 868 00 METAL OXIDE 680 5 1W R793 1 249 425 11 CARBON 4 7K 5 1 4W F R799 1 215 868 00 METAL OXIDE 680 5 1W 0R800 1...

Page 34: ...26 964 11 ELECT 10uF 20 00 50V C1604 1 164 159 11 CERAMIC 0 1uF 50V C1605 1 128 805 11 CERAMIC 47PF 5 50V C1606 1 128 805 11 CERAMIC 47PF 5 50V C1607 1 126 960 11 ELECT 1uF 20 00 50V C1608 1 126 960 11 ELECT 1uF 20 00 50V C1609 1 126 960 11 ELECT 1uF 20 00 50V C1611 1 126 965 11 ELECT 22uF 20 00 50V C1612 1 126 964 11 ELECT 10uF 20 00 50V CONNECTOR CNP911 1 784 925 11 PIN CONNECTOR 10P CNS107 1 69...

Page 35: ...35 STR K402 MEMO ...

Page 36: ...TORY 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 1 0 2001 04 New ...

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