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1、STR-SE381 US ModelSERVICE MANUAL FM STEREO/FM-AM RECEIVER MICROFILM Manufactured under license from Dolby Laboratories Licensing Corporation. “Dolby” “Pro Logic” and the double-D symbol a are trademarks of Dolby Laboratories Licensing Corporation. SPECIFICATIONS Continued on next page Audio power sp
2、ecifications POWER OUTPUT AND TOTAL HARMONIC DISTORTION With 8-ohm load, both channels driven, from 40 - 20,000 Hz, rated 60 watts per channel minimum RMS power, with no more than 0.5% total harmonic distortion from 250 milliwatts to rated output. Amplifier section Stereo mode(8 ohms at 40 Hz - 20 k
3、Hz less than 0.5% total harmonic distortion) 60 W + 60 W Surround mode(8 ohms at 1 kHz, THD 0.5%) Front: 60 W/ch Center: (Pro Logic Mode) 60 W Rear: 60 W/ch Frequency responsePHONO: RIAA equalization curve 0.5 dB TV/DBS, CD, TAPE/MD, VIDEO INPUT 10 Hz - 50 kHz 1 dB Inputs Sensitivity Impedance S/N (
4、weighting network, input level) PHONO (MM) 2.5 mV50 Kilohms72 dB* (A, 2.5 mV) CD400 mV TAPE/MD,250 mV TV/DBS,50 Kilohms82 dB* VIDEO(A, 150 mV) *78 IHF OutputsTAPE/MD REC OUT: Voltage: 150 mV, Impedance: 10 kilohms VIDEO AUDIO OUT: Voltage: 150 mV, Impedance: 10 kilohms PHONES: Accepts low and high i
5、mpedance headphones MutingFull mute BASS BOOST+10 dB at 70 Hz TONE8 dB at 100 Hz and 10 kHz FM tuner section Tuning range87.5 - 108.0 MHz Antenna terminals75 ohms, unbalanced 300 ohms, balanced SensitivityMono: 18.3 dBf, 4.5 V Stereo: 38.3 dBf, 45 V Usable sensitivity11.2 dBf, 2 V (IHF) S/NMono: 76
6、dB Stereo: 70 dB Harmonic distortion at 1 kHz Mono: 0.3% Stereo: 0.59% Separation45 dB at 1 kHz +0.5 Frequency response30 Hz - 15 kHz2 dB Selectivity60 dB at 400 kHz AM tuner section Tuning range531 - 1710 kHz AntennaLoop antenna Usable sensitivity50 dB/m (at 1,000 kHz) S/N54 dB (at 50 mV/m) Harmoni
7、c distortion0.5% (50 mV/m, 400 kHz) SelectivityAt 10 kHz: 40 dB RadioFans.CN 收音机爱 好者资料库 2 1.GENERAL Location and Function of controls3 2.TEST MODE5 3.DIAGRAMS 3-1.Circuit Boards Location 6 3-2.Printed Wiring Board (Display Section) 7 3-3.Schematic Diagram (Display Section) 9 3-4.Printed Wiring Board
8、 (Volume Section) 11 3-5.Schematic Diagram (Volume Section) 13 3-6.Printed Wiring Board (Main Section) 15 3-7.Schematic Diagram (Main (1/3) Section) 17 3-8.Printed Wiring Board (Power Section) 19 3-9.Schematic Diagram (Main (2/3), Power Section ) 21 3-10. Schematic Diagram (Main (3/3), SP SW Section
9、 ) 23 3-11. IC Pin Function 25 3-12. IC Block Diagrams 27 4.EXPLODED VIEWS 4-1.Front Panel Section 29 4-2.Chassis Section 30 5.ELECTRICAL PARTS LIST31 TABLE OF CONTENTS General SystemTuner section: PLL quartz-locked digital synthesizer system Preamplifier section: Low-noise NF type equalizer Power a
10、mplifier section: Pure-complementary SEPP Power requirements120 V AC, 60 Hz Power consumption150 W AC outlets2 switched, total 120 W/1A Max Dimensions17 5 7/8 11 5/8 inches (430 145 295 mm) Mass (Approx.)14 IB 5 oz (6.5 kg) Supplied accessoriesFM wire antenna (1) AM loop antenna (1) Remote controlle
11、r (remote) (1) Size AA (R6) batteries (2) Design and specifications are subject to change without notice. SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ! OR DOTTED LINE WITH MARK ! ON THE SCHEMATIC DIAGRAMS AND IN THE PARTS LIST ARE CRITICAL TO SAFE OPERATION. REPLACE THESE COMPONE
12、NTS WITH SONY PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL OR IN SUPPLEMENTS PUBLISHED BY SONY. After correcting the original service problem, perform the following safety checks before releasing the set to the customer: Check the antenna terminals, metal trim, “metallized” knobs, screws,
13、 and all other exposed metal parts for AC leakage. Check leakage as described below. LEAKAGE 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 microampers). Leakage current can
14、 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 v
15、oltage 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 multime
16、ters that have a 2V AC range are suitable. (See Fig. A) SAFETY CHECK-OUT To Exposed Metal Parts on Set 0.15F1.5k AC voltmeter (0.75V) Earth Ground Fig. A. Using an AC voltmeter to check AC leakage. RadioFans.CN 收音机爱 好者资料库 3 SECTION 1 GENERAL LOCATION AND FUNCTION OF CONTROLS FRONT PANEL 1POWER switc
17、h (I/u) 2CENTER LEVEL +, buttons 3REAR LEVEL +, buttons 4PRO LOGIC indicator 5C. STUDIO indicator 6HALL indicator 7VIDEO FUNCTION button 8TV/DBS FUNCTION button 9TAPE/MD FUNCTION button 0MASTER VOLUME control !BALANCE control !TREBLE control !BASS control !BASS BOOST button/indicator !SURROUND ON/OF
18、F button !MODE button !SET UP button !EFFECT/DELAY TIME button !PHONO FUNCTION button TUNER FUNCTION button CD FUNCTION button DIRECT button SHIFT button Numeric buttons PRESET TUNING +, buttons MEMORY button AM button FM button FM MODE button #TUNING +, buttons #PHONES jack #SPEAKERS A/B switch 123
19、 4 5 67 8 9! # # # ! ! ! RadioFans.CN 收音机爱 好者资料库 4 REAR PANEL 1y SIGNAL GND 2AC OUTLET 3AC power cord 4FRONT SPEAKERS (A/B) 5SURROUND SPEAKERS (CENTER) 6SURROUND SPEAKERS (REAR) 7VIDEO 8TV/DBS 9TAPE/MD !CD !PHONO !ANTENNA (AM/FM) 1 2 ! ! !954 3 7 68 STR-SE381 5 6 SECTION 2 TEST MODE INITIALIZATION M
20、ODE *All preset contents are cleared when this mode is activated. Use this mode before returning the product to clients upon completion of repair. *Procedure: While depressing the VIDEO, TAPE/MD and the CD buttons simultaneously, press the power I/u button to turn on the main power. The message INIT
21、IAL appears and initialization is performed. FLUORESCENT INDICATOR TUBE TEST MODE *All fluorescent segments are tested. When this test is activated, all segments turn on at the same time, then each segment turns on one after another. *Procedure: While depressing the CD and the TAPE/MD buttons simult
22、aneously, press the power I/u button to turn on the main power. All segments turn on at the same time, then each segment turns on one after another. The message FINISH appears when this test is complete. AM CHANNEL STEP 9 kHz/10 kHz SELECTION MODE *Either the 9 kHz step or 10 kHz step can be selecte
23、d for the AM channel step. *Procedure: Set the FUNCTION to AM. Turn off the main power. While depressing the TUNING+ button, press the power I/u button to turn on the main power. Either the message 9k STEP or 10k STEP appears. Select the desired step. REAR SPEAKER GAIN UP MODE *The rear speaker gain
24、 can be set to either NORMAL or GAIN UP. *Procedure: While depressing the -SURROUND button, press the power I/ u button to turn on the main power. Either the message NORMAL or GAIN UP appears. When the product enters this mode again, the other gain appears. Select the desired gain. SECTION 3 DIAGRAM
25、S 3-1.CIRCUIT BOARDS LOCATION Waveforms For schematic diagrams. Note: All capacitors are in F unless otherwise noted. pF: F 50 WV or less are not indicated except for electrolytics and tantalums. All resistors are in and 1/4 W or less unless otherwise specified. %: indicates tolerance. : internal co
26、mponent. 2 : nonflammable resistor. 1 : fusible resistor. C : panel designation. U : B+ Line. V : B Line. H : adjustment for repair. Voltages and waveforms are dc with respect to ground under no-signal (detuned) conditions. No mark : FM Voltages are taken with a VOM (Input impedance 10 M). Voltage v
27、ariations may be noted due to normal production tolerances. Waveforms are taken with a oscilloscope. Circled numbers refer to waveforms. Signal path. F: FM THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS. (In addition to this necessary note is printed in each block.) For printed
28、 wiring boards. Note: X : parts extracted from the component side. b : Pattern from the side which enables seeing. Note: The components identified by mark ! or dotted line with mark ! are critical for safety. Replace only with part number specified. SECONDARY board STANDBY board MAIN board VOLUME bo
29、ard VR-TONE board KEY board SW (B) board SW (A) board DISPLAY board SW board PRIMARY board STR-SE381 7 8 3-2.PRINTED WIRING BOARD DISPLAY SECTION 12 A B C D E F 345678910111212 A B C D E F 3456789101112 Ref. No.Location D201B-2 D202B-2 D203B-3 D204A-11 D211B-8 D213B-8 D214B-8 D224B-7 D231B-1 D235B-7
30、 D236B-8 D237B-9 IC201B-5 IC202B-2 IC203C-9 Q201A-10 Q202A-10 Q231B-1 Semiconductor Location DISPLAY BOARD KEY BOARD A TO VOLUME BOARD CNP202 (Page 11) H TO MAIN BOARD CNS204 (Page 15) 16 41 41 DIRECT VIDEO PHONO SHIFT 2134 67890 5 1-665-268- 11 (12) EFFECT DELAY TIME SET UP MODE SURROUND ON/OFF 1 1
31、 9 7 E 1 80 24 25 65 64 40 41 IC201 1251417313435 HALLC.STUDIOPRO LOGIC REMOTE SENSOR REAR LEVEL CENTER LEVEL POWER EE 1-665-267- 11 (12) PRESET TUNING MEMORYFM MODE TUNING AMFM CD TV/DBS TUNER TAPE/MD STR-SE381 9 10 3-3.SCHEMATIC DIAGRAM DISPLAY SECTION See page 6 for Waveforms. See page 25 for IC
32、Pin Functions. See page 27 for IC Block Diagrams. STR-SE381 11 12 3-4.PRINTED WIRING BOARD VOLUME SECTION 1-665-276- 11 (12) 1-665-277- 11 1 13 5 (12) 1-665-278- 11 (12) 1-665-269- 11 (12) 1-665-270- 11 (12) SW BOARD SW (A) BOARDSW (B) BOARD J741 PHONES D E TO MAIN BOARD CNP702 (Page 16) TO MAIN BOA
33、RD CN706 (Page 16) S701 SPEAKERS S701-1 A S701-2 B VR-TONE BOARD VOLUME BOARD M MASTER VOLUME F TO MAIN BOARD CNS301 (Page 15) TO MAIN BOARD CNS701 (Page 15) AG TO DISPLAY BOARD CNS202 (Page 7) 14 58 E E RV404 BASS BASS BOOST TREBLEBALANCE 17 16 12 A B C D E F G 345678910111212 A B C D E F G 3456789
34、101112 Ref. No.Location D238C-2 D421F-1 IC404F-3 Q401E-3 Q402F-2 Q451F-3 Q452E-2 Semiconductor Location STR-SE381 13 14 3-5.SCHEMATIC DIAGRAM VOLUME SECTION See page 7 for KEY Board Wiring Board. STR-SE381 15 16 3-6.PRINTED WIRING BOARD MAIN SECTION 1-665-266- 13 1 5 E TO SW (B) BOARD CNS702 (Page 1
35、1) H TO DISPLAY BOARD CNS201 (Page 7) G TO VOLUME BOARD CNS402 (Page 11) F TO VOLUME BOARD CNS403 (Page 11) 112 1324 IC300 MAIN BOARD AUDIO OUT AUDIO ININREC OUTCD J402 FRONT SPEAKERS SURROUND SPEAKER REAR ANTENNA AM FM 300 CENTERRL RLRLRLRLRLRL VIDEOTAPE /MD A B TM701 TM601 TV/DBS TM001 J403 RY801
36、C TO STANDBY BOARD CNP802 (Page 19) TO SW BOARD CNP703, CNP704 (Page 12) D B TO SECONDARY BOARD CNP801 (Page 19) FM 75 1 14 58 1 4 8 E 11 1 E E E E E E E E E E E E E E E E E E E E E E E E 1 15 14 2 E 1 1 1 1 15 1630 4 5 8 23 11 10 5 1 4 3 3 E 1 14 58 21 22 42 E E E E E E E E 1 15 14 2 16 12 A B C D
37、E F G H I 345678910111212 A B C D E F G H I 3456789101112 Ref. No.Location D610C-6 D710H-10 D721F-5 D722F-5 D723G-5 D724G-5 D725G-5 D801G-5 D802E-10 D804H-6 D810B-11 D811B-11 D812B-11 D813B-11 D814B-11 D815B-11 D817E-5 D818C-11 D820C-11 D821C-11 D822C-10 D823C-10 D901H-2 IC300G-4 IC301E-4 IC302F-3 I
38、C401C-4 IC402C-2 IC701G-6 IC702D-6 IC801E-5 IC802D-5 IC950B-9 Q303G-2 Q304F-2 Q307F-2 Q308G-2 Q601C-7 Q602C-8 Q603C-8 Q604B-8 Q610C-6 Q620C-7 Q651F-7 Q652F-8 Q653F-8 Q654F-8 Q670F-7 Q701H-7 Q702H-8 Q703H-8 Q704G-8 Q710H-10 Q720G-7 Q721G-5 Q722G-5 Q723G-5 Q751E-7 Q752D-8 Q753E-8 Q754D-8 Q770D-7 Q801H
39、-6 Q802C-12 Q808E-5 Q809D-11 Q951B-9 Semiconductor Location STR-SE381 17 18 3-7.SCHEMATIC DIAGRAM MAIN (1/3) SECTION See page 27 for IC Block Diagrams. STR-SE381 19 20 3-8.PRINTED WIRING BOARD POWER SECTION 12 A B C D E F G 345678910111213 STANDBY BOARD AC OUTLET SECONDARY BOARD B TO MAIN BOARD CN80
40、1 (Page 16) PRIMARY BOARD 1-665-274- 1-665-273- 1-665-272- 11 (12) 11 (12) 11 (12) T901 POWER TRANSFORMER T902 C TO MAIN BOARD CNS802 (Page 16) AC IN 1 111 4 16 CNP903 CN902 STR-SE381 21 22 3-9.SCHEMATIC DIAGRAM MAIN (2/3), POWER SECTION See page 27 for IC Block Diagrams. STR-SE381 23 24 3-10. SCHEM
41、ATIC DIAGRAM MAIN (3/3), SP SW SECTION See page 12 for SW Board Wiring Board. See page 27 for IC Block Diagrams. 25 Pin No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 I/O O O O O O O O I I I O O I O I I I I O O O O I I I I O O Descr
42、iption Fluorescent indicator tube drive. Power supply (+5V). System clock. System data. PLL data input from TU001. Chip enable output. Chip enablr output. Input for model select. Standby relay ON/OFF control. Protector detect input. System reset terminal. Auto stop detect input. Stereo detect input.
43、 Ground. Speaker relay drive. Surround Relay. Power relay drive. Not used. A/D signal input terminal. A/D3 key input terminal. A/D2 key input terminal. A/D1 key input terminal. Power supply (+5V). Reference voltage (+5V). Ground. Not used (Open). Ground. System clock (4.19MHz). System clock (4.19MHz
44、). Mute drive output for PD2581V (IC701). Prologic LED drive. CINEMA STUDIO LED drive. Hall LED drive. Tuner mute drive output. Pin Name DIG7 DIG6 DIG5 DIG4 DIG3 DIG2 DIG1 +5V S. CLK S. DATA PLL. DATA S. CE (LC7288) S. CE (LV100) REAR-R BRIDGE CABLE PROTECT RESET AUTO-STOP STEREO-IN AVss SP-RY SURR-
45、RY POWER-RY Not used SIGNAL A/D3 A/D2 A/D1 AVDD AV. REF GND NC Vss X1 X2 IC. MUTE PROLOGIC CSTUDIO HALL T. MUTE 3-11. IC PIN FUNCTION DISPLAY BOARD IC201 : PD78044FGF-064-3B9 (SYSTEM CONTROL) 26 Pin No. 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 7
46、3 74 75 76 77 78 79 80 I/O O O I I I I I I O O O I I I I I O O O O O O O O O O O O O O O O O O O Description Volume up. Volume down. Standby LED drive. System power ON/OFF. RDS data input terminal (EXCEPT Australian, E, Saudi Arabia, PX model). RDS clock input terminal (EXCEPT Australian, E, Saudi A
47、rabia, PX model). Stop signal input from NJM2103D (IC950). Ground. Sircs signal input. Power switch input terminal. 5.1ch input LED. Power supply (+5V). Bass boost LED drive. Line mute drive. Surround Lch mute. Input for model select. Key in 4. Key in 3. Key in 2. Key in 1. Surround Rch mute. Key ou
48、t 1. Key out 2. Key out 3. Key out 4. Connect to 24V. Fluorescent indicator tube drive. Pin Name VOLUME UP VOLUME DOWN STANDBY SYS. POWER RDS. DATA. IN RDS. CLK. IN STOP Vss SIRCS POWER SW 5.1ch LED +5V BASS BOOST FUNC. MUTE SL MUTE VERSION K14 K13 K12 K11 SR MUTE S15 S14 S13 S12 S11 S10 S9 S8 S7 VL
49、OAD S6 S5 S4 S3 S2 S1 DIG10 DIG9 DIG8 Fluorescent indicator tube drive. 27 3-12. IC BLOCK DIAGRAMS IC300LV1016 IC301LA2786 156 + + 201918171615141321222324 234789101211 + DEC IN-FILTER (40kHz) VDD ADM-CONTSRAM ADM OUT-FILTER (7k/5k) B-NR DC-OUT VOL/MUTE S-TRIM INV-PHASE R+DELAYL+DELAY A B A B A B A B A B A B A B LR L+R (6dB) A B A.GND L-OUT R-OUT VREF S-OUT DELAY-OUT S-IN R-IN L-IN VCC NR-DET ENABLE DATA CLK
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