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STR-DE845/DE945
SERVICE MANUAL US Model
Canadian Model
STR-DE845/DE945
E Model
Australian Model
Chinese Model
PX Model
STR-DE845
Photo: STR-DE945
Manufactured under license from Dolby labora-
tories. “Dolby”, “AC-3”, “Pro Logic” and the double-
D symbol ; are trademarks of Dolby Laborato-
ries.
Manufactured under license from Digital Theater
Systems, Inc. US Pat. No. 5,451,942 and other
worldwide patents issued and pending. “DTS” an
d “DTS Digital Surround” are trademarks of Digi-
tal Theater Sy
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Models of area code E AC outlets FM tuner section General With 10-kHz tuning Models of area code U, Tuning range 87.5 - 108.0 MHz System Tuner section: scale: CA 6) PLL quartz-locked 530 – 1610 kHz 2 switched, Antenna terminals digital synthesizer With 9-kHz tuning total 120 W/1A 75 ohms, unbalanced system scale: Models of area code Preamplifier section: 6) 531 – 1602 kHz AU, SP Sensitivity Mono: 18.3 dBf, Low-noise NF type 1 switched, 2.2 µ V/75 ohms equalizer Antenna Loop antenna total 100 W
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SAFETY CHECK-OUT TABLE OF CONTENTS After correcting the original service problem, perform the follow- ing safety check before releasing the set to the customer: 1. GENERAL ................................................................... 4 Check the antenna terminals, metal trim, “metallized” knobs, screws, and all other exposed metal parts for AC leakage. 2. DISASSEMBLY ......................................................... 6 Check leakage as described below. 3. TEST MODE .............
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SECTION 1 GENERAL Location of controls – Front view – (STR-DE945 only) (STR-DE845 only) 12 34 4 5 MULTI CHANNEL DECODING PRESET –+ SHIFT TUNING DIMMER DISPLAY –+ TUNING MEMORY EQUALIZER BASS BOOST FM/AM FM MODE 2ND AUDIO INPUT MODE 5.1CH INPUT MASTER VOLUME SPEAKERS A OFF B – + 5.1CH BASS A+B VIDEO 1 VIDEO 2 VIDEO 3 DVD/LD TV/SAT INPUT CINEMA STUDIO EX. LEVEL SET UP MUTING EQUALIZER BOOST AB C SUR NAME SOUND FIELD TAPE MD/DAT CD TUNER PHONO VIDEO 3 INPUT PHONES A.F.D. 2CH MODE EQ ENTER 010 VIDE
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– Rear View – 1 23 4 5 6 FRONT REAR CENTER OPTICAL COAX SPEAKERS AUDIO OUT ANTENNA RL MD/DAT MD/DAT TV/SAT DVD/LD DVD/LD BA L IN OUT IN IN IN + + + + AM R RL RL SUB – – WOOFER 5.1CH INPUT DIGITAL SUB WOOFER U RL FRONT – – 4 Ω 8 Ω COAXIAL CTRL S S-VIDEO CTRL S S-VIDEO S-VIDEO CTRL S CTRL S S-VIDEO S-VIDEO FRONT REAR CENTER FM IN OUT STATUS IN IN IN OUT OUT OUT IN IMPEDANCE SELECTOR 75Ω IMPEDANCE USE 4 – 16Ω 8 – 16Ω VIDEO OUT AC OUTLET SIGNAL GND U MONITOR CONTROL A1 VIDEO IN VIDEO IN VIDE
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SECTION 2 DISASSEMBLY Note: Follow the disassembly procedure in the numerical order given. CASE 3 case 1 two screws 1 two screws 2 2 1 two screws 5.1 IN BOARD, AU SW BOARD, TUNER 5 5.1 IN board, AU SW board 1 wire (flat type) (15 core) 2 connector (CN1) (CNP10) 4 tuner 3 four screws (BVTP 3X8 ) 6
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VIDEO/OSD/JOINT (1) (H)/OSD JOINT (H)/ S-VIDEO/DIGITAL BOARD 3 screw (BVTP 3X8 ) 1 wire (flat type) (21 core) (CN55) 1 wire (flat type) (15 core) (CN51) 4 DIGITAL board 8 VIDEO board (DE845)/OSD board (DE945), JOINT (1) (H) board (DE845)/OSD JOINT (H) board (DE945) S-VIDEO board 5 bracket (digital) 2 three screws DE945 (BVTP 3X8 ) 6 connector (CNS213) 7 seven screws (BVTP 3X8 ) HEAT SINK 5 heat sink 4 screw (BVTP 3X8 ) 4 screw (BVTP 3X8 ) 3 two screws (BVTP 3X6) 1 five connectors 2 ten screws
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VOL BOARD, MAIN BOARD DE945 6 connector (CNS305) 7 three screws (BVTP 3X8 ) 8 MAIN board 5 four screws (BVTP 3X8 ) 1 wire (flat type) (23 core) (CNS111) 4 VOL board 3 washer 2 knob 8
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SECTION 3 TEST MODE Fluorescent Indicator Tube Test Mode AM Channel Step 9 kHz/10 kHz All fluorescent segments are tested. When this test is activated, Selection Mode (US, Canadian, and E Models) all segments turn on at the same time, then each segment turns on Either the 9 kHz step or 10 kHz step can be selected for the AM one after another. channel step. Procedure: Procedure: 1. While depressing, the [A.F.D] and the [DIMMER] buttons si- 1. Set the FUNCTION to AM. Turn off the main power. mu
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MEMO 10
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STR-DE845/DE945 SECTION 4 DIAGRAMS (DE945) 4-1. BLOCK DIAGRAM – MAIN Section (1/2) – SELECTOR IC309 IC330 J306 L 2ND 26 TUNER COM 26 TM301 AUDIO TUNER UNIT 27 CD COM 27 R OUT R CH 25 MD COM 25 Q301 RY301 TAPE 23 RELAY TM301 15 14 16 DRIVE (ANTENNA) (DE945) SELECTOR IC1502 FM FM 75Ω AUDIO SELECT 19 2CH L IC301 SELECTOR AM AM 18 CDL IC1510 IC303 IC304 J305 L OUT AUDIO CODEC L 10 3 20 S.1-L 17 FRONT L L OUT TV/SAT INPUT L 27 IC1504 IC1504 IC1503 R OUT R CH 12 MUTE 4 23 S.1-LS REAR L DVD/LD INPUT
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STR-DE845/DE945 4-2. BLOCK DIAGRAM – MAIN Section (2/2) – (DE945) VIDEO SELECT IC2005 J299-2 VIDEO 3 7 V3 VCC 16 +5V VIDEO INPUT VEE 8 –5V J2003 TV/SAT VIDEO IN 3 TV SW1 14 77 VIDEO (SW1) DVD/LD VIDEO IN 5 LD SW2 10 76 VIDEO (SW2) SYSTEM CONTROLLER VIDEO OUT 11 V2 OUT SW3 4 75 VIDEO (SW3) IC1201 (2/2) VIDEO 2 SW4 6 72 VIDEO (SW4) J2002 D2003 D2004 VIDEO IN 9 V2 IN VIDEO OUT 15 V1 OUT SW5 2 VIDEO 1 VIDEO IN 13 V1 IN3 M OUT 1 Y SWITCH IC252 3 V1 OUT 15 TV Y Y J252-2 14 J253-1 SW1 VIDEO 1 5 LD
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STR-DE845/DE945 4-3. BLOCK DIAGRAM – DISPLAY/POWER SUPPLY Section – POWER AMP (L) R CH IC501 J701 PHONES +B 13 VCC RY602 BOOSTER +VE 12 14 VCC RELAY VOLUME Q506 DRIVE RV401 VOL CONT –B 15 VEE Q601 TM501 IC408 IC414 L 31 Q505 IN 9 3 OUT 2 8 IN NF L BIAS DATA A 9 DATA Q511 CLK R 8 CLK AF DETECTOR FRONT 1 MUT LAT Q509,510 BOOSTER CUR DET 10 LAT 11 L –VE Q507 Q508 B RY501 • SIGNAL PATH IC409 VOL CONT R CH R RELAY POWER AMP (C/W) (1/2) IC415 C DRIVE IC601 31 : FM IN Q546 3 OUT 2 SPEAKERS +B 13 VC
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4-4. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS • Circuit Boards Location Note on Schematic Diagram: Note on Printed Wiring Board: • All capacitors are in µF unless otherwise noted. pF: µµF •X : parts extracted from the component side. 50 WV or less are not indicated except for electrolytics SP board DC (2) board •Y : parts extracted from the conductor side. and tantalums. • a : Through hole. f • : internal component. •b : Pattern from the side which enables seeing. AC board •
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STR-DE845/DE945 4-5. SCHEMATIC DIAGRAM – DIGITAL Board (1/3) –• See page 42 for Waveform. • See page 42 for IC Block Diagram. (Page 16) (Page 17) PIN FUNCTION (Page 39) (Page 27) (Page 29) (Page 32) (Page 29) 15 15
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STR-DE845/DE945 4-6. SCHEMATIC DIAGRAM – DIGITAL Board (2/3) –• See page 42 for Waveform. • See page 42 for IC Block Diagrams. PIN FUNCTION (Page 17) (Page 15) 16 16
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STR-DE845/DE945 4-7. SCHEMATIC DIAGRAM – DIGITAL Board (3/3) –• See page 42 for Waveform. • See page 42 for IC Block Diagrams. (Page 16) PIN FUNCTION PIN FUNCTION (Page 25) (Page 15) The components identified by mark 0 or dotted Les composants identifiés par une marque 0 sont line with mark 0 are critical for safety. critiques pour la sécurité. Ne les remplacer que Replace only with part number specified. par une pièce portant le numéro spécifié. 17 17
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STR-DE845/DE945 4-8. PRINTED WIRING BOARD – DIGITAL Board (Component Side) –• See page 14 for Circuit Boards Location. • Semiconductor Location Ref. No. Location Ref. No. Location D1001 I-2 IC1201 D-4 D1101 F-3 IC1202 F-5 D1201 B-3 IC1301 H-5 D1202 D-2 IC1401 G-8 D1203 D-5 IC1402 I-8 D1204 G-12 IC1403 J-7 D1205 G-12 IC1404 I-4 D1208 F-15 IC1503 I-11 D1209 F-2 IC1504 H-12 D1210 D-4 IC1554 G-11 D1211 G-16 D1212 B-1 Q1201 E-6 Q1202 E-6 IC1005 I-2 Q1203 E-2 IC1007 I-1 Q1204 E-2 IC1101 H-3 18 18
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STR-DE845/DE945 4-9. PRINTED WIRING BOARD – DIGITAL Board (Conductor Side) –• See page 14 for Circuit Boards Location. (Page 28) (Page 26) (Page 28) (Page 30) (Page 38) (Page 24) • Semiconductor Location Ref. No. Location Ref. No. Location D1206 F-14 IC1204 J-17 D1207 F-13 IC1205 F-14 D1502 I-11 IC1206 H-16 D1503 I-11 IC1207 H-14 IC1208 G-13 IC1001 F-1 IC1501 J-15 IC1002 E-1 IC1511 B-6 IC1003 D-1 IC1004 C-1 Q1205 G-17 IC1203 J-14 19 19
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STR-DE845/DE945 4-10. PRINTED WIRING BOARDS – VIDEO/JOINT (1) (H) Boards (DE845) –• See page 14 for Circuit Boards Location. (Page 26) TO VIDEO BOARD TO JOINT (1) (H) BOARD 20 20
