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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.
Amplifier section
Rated Power
Output at Stereo
Canadian model:
Mode
(8 ohms 40 Hz - 20 kHz,
less than 0.09% total
harmonic distortion)
80 W + 80 W
Malaysia, Singapore model
(8 ohms at 1 kHz, THD
0.7%)
80 W + 80 W
Other countries:
(8 ohms at 1 kHz, THD
0.7%)
50 W + 50 W
Reference Power
Canadian model:
Output
(8 ohms at 1 kHz, THD
0.7%)
Front: 80 W/ch
Center: 80 W
Surround: 80 W/ch
Malaysia, Singapore model
(8 ohm at 1 kHz, THD 10%)
Front: 90 W/ch
Center: 90 W
Surround: 80 W/ch
Other countries:
(8 ohms at 1 kHz, THD
10%)
Sony Corporation
9-873-861-11
2001D1600-1
Audio Entertainment Group
© 2001.4
General Engineering Dept.
STR-DE375
SPECIFICATIONS
Front: 50 W/ch
Center: 50 W
Surround: 50 W/ch
Frequency
TV/SAT, CD, MD/TAPE,
response
VIDEO, DVD/MULTI
CH: 10 Hz - 50 kHz
Inputs
Sensitivity
Impedance
CD,
DVD/
MULTI CH,
50
150 mV
MD/TAPE,
kilohms
TV/SAT,
VIDEO
Outputs
MD/TAPE OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
VIDEO AUDIO OUT:
Voltage: 150 mV,
Impedance: 10 kilohms
SUB WOOFER:
Voltage: 2 V
Impedance: 1 kilohms
PHONES: Accepts low
and high impedance
headphones
FM STEREO FM-AM RECEIVER
Canadian Model
Muting
TONE
Tuner section
+0.5
FM stereo, FM/AM superheterodyne tuner
dB
–2
FM tuner section
S/N
Tuning range
Antenna terminals
85 dB
Intermediate
frequency
Sensitivity
Usable sensitivity
S/N
Harmonic
distortion at
1 kHz
— Continued on next page —
AEP Model
UK Model
E Model
Full mute
±6 dB at 100 Hz and
10 kHz
87.5 - 108.0 MHz
75 ohms, unbalanced
10.7 MHz
Mono: 18.3 dBf, 4.5 µV
Stereo: 38.3 dBf, 45 µV
11.2 dBf, 1 µV (IHF)
Mono: 76 dB
Stereo: 70 dB
Mono: 0.3 %
Stereo: 0.5 %

Summary of Contents

  • Page 1

    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. Amplifier section Rated Power Output at Stereo Canadian model: Mode (8 ohms 40 Hz - 20 kHz, less than 0.09% total harmonic distortion)

  • Page 2

    STR-DE375 Separation 45 dB at 1 kHz +0.5 Frequency 30 Hz - 15 kHz –2 response Selectivity 60 dB at 400 kHz AM tuner section Tuning range Malaysia, Singapore model 531 - 1602 kHz (9 kHz step) Canadian model: 530 - 1710 kHz (10 kHz step)* 531 - 1710 kHz (9 kHz step)*...

  • Page 3: Table Of Contents

    SAFETY CHECK-OUT 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, and all other exposed metal parts for AC leakage. Check leakage as described below.

  • Page 4

    STR-DE375 Front Panel 1 ?/1(POWER) button 2 DISPLAY button 3 DIMMER button 4 PHONES jack 5 PRESET/PTY SELECT + , – buttons TUNING + , – buttons MEMORY button SHIFT button PTY button FM MODE button FM/AM button SECTION 1 GENERAL 6 SET UP button and indicator 7 NAME button and indicator...

  • Page 5

    Rear Panel 3 4 5 6 7 1 ANTENNA (AM/FM) 2 DVD/MULTI CH 3 CD 4 MD/TAPE 5 TV/SAT 6 VIDEO 7 SUB WOOFER 8 SPEAKERS SURROUND 9 SPEAKERS CENTER q; SPEAKERS FRONT STR-DE375 This section is extracted from instruction manual. qa VOLTAGE SELECTOR (except Singapore, Malaysia and Canada models)

  • Page 6: Test Mode

    STR-DE375 FACTORY SET MODE * All preset contents are reset to the default setting. * Procedure: While depressing the VIDEO and the CD buttons simultaneously, press the power ?/1 button to turn on the main power. The message “FACTORY” appears and the present contents are reset to the default values.

  • Page 7: Circuit Boards Location

    3-1. CIRCUIT BOARDS LOCATION SECONDARY board PRIMARY board (except E model) POWER SWITCH board HEADPHONE board • WAVEFORMS – MAIN BOARD – IC1 qf 2.2Vp-p 230ns – DISPLAY BOARD – IC103 qa 5.0Vp-p 200ns SECTION 3 DIAGRAMS VOL-SEL board (E model) STANDBY board DISPLAY board STR-DE375...

  • Page 8

    STR-DE375 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. Note: • All capacitors are in µF unless otherwise noted. pF: µµF 50 WV or less are not indicated except for electrolytics and tantalums.

  • Page 9: Block Diagram

    3-2. BLOCK DIAGRAM TUNER UNIT L OUT R OUT R-CH AM DET OUT PLL DATA DATA OUT S DATA S DATA S CLK S CLK S CE SLAT SIGNAL SIGNAL STEREO STEREO AUTO STOP TUNED T MUTE T MUTE J401,402 CD IN MD/TAPE OUT MD/TAPE IN...

  • Page 10: Printed Wiring Board Main Section

    STR-DE375 3-3. PRINTED WIRING BOARD – MAIN SECTION – IC 805 IC 1 IC 202 TUNER UNIT • Semiconductor Location Ref. No. Location Ref. No. Location Ref. No. Location Ref. No. Location D301 D727 Q365 D470 D728 IC201 Q366 D505 D731 C-10 IC202...

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

    STR-DE375 3-4. SCHEMATIC DIAGRAM – MAIN SECTION(1/3) – IC B/D IC B/D IC B/D...

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

    STR-DE375 3-5. SCHEMATIC DIAGRAM – MAIN SECTION(2/3) – 1.7uH 1.7uH 1.7uH 1.7uH 1.7uH...

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

    STR-DE375 3-6. SCHEMATIC DIAGRAM – MAIN SECTION(3/3) – IC B/D...

  • Page 14: Printed Wiring Board Panel Section

    STR-DE375 3-7. PRINTED WIRING BOARD – PANEL SECTION – DVD/MULTI CH TV/SAT (Page 10) • Semiconductor Location Ref. No. Location D201 B-12 D202 B-13 D203 C-11 D204 D210 D211 D212 D213 D215 IC103 B-10 IC203 B-13 Q201 Q202 Q210 Q211 Q212 Q213 Q215...

  • Page 15: Schematic Diagram Panel Section

    STR-DE375 3-8. SCHEMATIC DIAGRAM – PANEL SECTION – DVD/MULTI CH TV/SAT S231 PRESET/ FM MODE MUTING PTY SELECT + FM/AM PRESET/ PTY SELECT –...

  • Page 16: Printed Wiring Board Power Section

    STR-DE375 3-9. PRINTED WIRING BOARD – POWER SECTION – CND MODEL ONLY...

  • Page 17: Schematic Diagram Power Section

    STR-DE375 3-10. SCHEMATIC DIAGRAM – POWER SECTION – IC B/D...

  • Page 18: Ic Block Diagrams, Ic Pin Function Description

    STR-DE375 3-11. IC BLOCK DIAGRAMS BU1924 (MAIN BAORD) CLOCK TEST DEFFERENTIAL BIPHASE PLL 57KHz DECODER DECODER 1187.5Hz RDS/ARI 8TH SWITCHED CAPACITOR FILTER IC701, IC702 uPC2581V (MAIN BOARD) IC950 NJM2103 (POWER BOARD) BIAS CIRCUIT PROTECTOR REG DRIVE DRIVE DRIVE DRIVE 2 3 4 5 6 8 9 10 11 12 13 14 15 + –...

  • Page 19

    Pin No. Pin Name REAR-RY CTR-RY FRONT-RY H/P-RY WOOFER RY SYS.POWER P115 — P114 — FUNC.MUTE P112 — HP SW P110 — SET UP LED NAME LED LEVEL LED SURR LED P103 — S.FIELD LED B.B. LED P100 — 71 – 74 P97 –...

  • Page 20: Front Panel Section

    STR-DE375 NOTE: • -XX, -X mean standardized parts, so they may have some differences from the original one. • Items marked “*” are not stocked since they are seldom required for routine service. Some delay should be anticipated when ordering these items.

  • Page 21: Chassis Section

    4-2. CHASSIS SECTION not supplied not supplied (PRIMARY board) not supplied T901 not supplied not supplied Ref. No. Part No. Description 4-232-237-01 FOOT (DIA. 30) A-4475-758-A STAND BOARD,COMPLETE (AEP,UK,SP,MY,AR) A-4475-857-A STAND BY BOARD,COMPLETE (E) A-4476-441-A STANDBY BOARD,COMPLETE (CND) A-4475-757-A MAIN BOARD,COMPLETE (AEP,UK) A-4475-854-A MAIN BOARD,COMPLETE (E,SP,MY,AR) A-4476-442-A MAIN BOARD,COMPLETE (CND) 1-773-009-11 WIRE (FLAT TYPE) (15 CORE)

  • Page 22: Electrical Parts List

    STR-DE375 DISPLAY NOTE: • Due to standardization, replacements in the parts list may be different from the parts specified in the diagrams or the components used on the set. • -XX, -X mean standardized parts, so they may have some difference from the original one.

  • Page 23

    Ref. No. Part No. Description R219 1-249-429-11 CARBON R220 1-249-407-11 CARBON R221 1-249-407-11 CARBON R222 1-249-407-11 CARBON R224 1-249-429-11 CARBON R225 1-249-429-11 CARBON R226 1-249-429-11 CARBON R227 1-249-425-11 CARBON 4.7K R228 1-249-427-11 CARBON 6.8K R229 1-249-427-11 CARBON 6.8K R230 1-249-427-11 CARBON 6.8K R231 1-249-427-11 CARBON...

  • Page 24

    STR-DE375 DISPLAY HEADPHONE Ref. No. Part No. Description S219 1-762-875-21 SWITCH, TACTILE (SF ON/OFF) S220 1-762-875-21 SWITCH, TACTILE (SUR) S221 1-762-875-21 SWITCH, TACTILE (MENU >) S222 1-762-875-21 SWITCH, TACTILE (MENU +) S223 1-762-875-21 SWITCH, TACTILE (ENTER) S224 1-762-875-21 SWITCH, TACTILE (NAME) S225 1-762-875-21 SWITCH, TACTILE (SET UP) S226...

  • Page 25

    Ref. No. Part No. Description C364 1-126-961-11 ELECT 2.2uF C365 1-126-961-11 ELECT 2.2uF C366 1-126-961-11 ELECT 2.2uF C367 1-136-165-00 FILM 0.1uF C368 1-164-159-11 CERAMIC 0.1uF C371 1-164-159-11 CERAMIC 0.1uF C372 1-164-159-11 CERAMIC 0.1uF C373 1-164-159-11 CERAMIC 0.1uF C374 1-164-159-11 CERAMIC 0.1uF C375 1-164-159-11 CERAMIC...

  • Page 26

    STR-DE375 MAIN Ref. No. Part No. Description C804 1-165-498-11 ELECT 4700uF C805 1-130-781-00 MYLAR 0.22uF C806 1-130-781-00 MYLAR 0.22uF C807 1-104-664-11 ELECT 47uF C808 1-104-664-11 ELECT 47uF C808 1-124-465-00 ELECT 0.47uF C810 1-124-465-00 ELECT 0.47uF C811 1-126-942-11 ELECT 1000uF C812 1-126-951-11 ELECT 470uF C813...

  • Page 27

    Ref. No. Part No. Description L651 1-420-872-00 COIL, AIR-CORE 1.7uH L701 1-420-872-00 COIL, AIR-CORE 1.7uH L751 1-420-872-00 COIL, AIR-CORE 1.7uH < TRANSISTOR > Q361 8-729-823-22 TRANSISTOR 2SC3576-AC Q362 8-729-823-22 TRANSISTOR 2SC3576-AC Q363 8-729-823-22 TRANSISTOR 2SC3576-AC Q364 8-729-823-22 TRANSISTOR 2SC3576-AC Q365 8-729-823-22 TRANSISTOR 2SC3576-AC Q366 8-729-823-22 TRANSISTOR 2SC3576-AC...

  • Page 28

    STR-DE375 MAIN Ref. No. Part No. Description R443 1-249-418-11 CARBON 1.2K R447 1-249-436-11 CARBON R448 1-249-436-11 CARBON R449 1-249-433-11 CARBON R450 1-249-437-11 CARBON R452 1-249-417-11 CARBON R453 1-249-417-11 CARBON R454 1-249-417-11 CARBON R455 1-249-417-11 CARBON R456 1-249-417-11 CARBON R457 1-249-417-11 CARBON R458 1-249-421-11 CARBON 2.2K...

  • Page 29

    Ref. No. Part No. Description R701 1-249-417-11 CARBON R702 1-249-439-11 CARBON R703 1-249-418-11 CARBON 1.2K R703 1-249-419-11 CARBON 1.5K R703 1-249-421-11 CARBON 2.2K R704 1-249-439-11 CARBON R705 1-249-433-11 CARBON R706 1-215-888-00 METAL OXIDE R706 1-216-453-00 METAL OXIDE R707 1-215-889-00 METAL OXIDE R707 1-216-452-11 METAL OXIDE R707...

  • Page 30

    STR-DE375 MAIN POWER SWITCH Ref. No. Part No. Description < VIBRATOR > 1-579-900-11 VIBRATOR, CRYSTAL 4.33MHz (AEP,UK) ************************************************************ 1-680-497-11 POWER SWITCH BOARD ******************** < CONNECTOR > * CNS104 1-564-518-11 PLUG, CONNECTOR 3P < RESISTOR > R239 1-249-425-11 CARBON 4.7K < SWITCH > S200 1-771-410-21 SWITCH, TACTILE (?/1) S209...

  • Page 31

    Ref. No. Part No. Description < TRANSFORMER > 0 T902 1-435-436-11 TRANSFORMER, POWER (CND) 0 T902 1-435-434-11 TRANSFORMER, POWER (E) 0 T902 1-435-435-11 TRANSFORMER, POWER (AEP,UK,SP,MY,AR) 0 T902 1-435-436-11 TRANSFORMER, POWER (CND) ************************************************************ 1-680-495-11 VOL-SEL BOARD (E) **************** < CONNECTOR > * CNP908 1-564-687-11 PIN, CONNECTOR 3P (E) <...

  • Page 32

    STR-DE375 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 2001.03...

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