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Sony STR-DB795 Service Manual
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Sony STR-DB795 Service Manual

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SERVICE MANUAL
Ver 1.0 2004.10
This receiver incorporates Dolby* Digital and Pro
Logic Surround and the DTS** Digital Surround
System.
* Manufactured under license from Dolby
Laboratories.
"Dolby", "Pro Logic" and the double-D symbol are
trademarks of Dolby Laboratories.
** "DTS" and "DTS Digital Surround" are registered
trademarks of Digital Theater Systems, Inc.
Amplifier section
POWER OUTPUT
Models of area code AEP, UK, TW, KR, AUS
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7%)
100 W + 100 W
90 W + 90 W
2)
Reference Power Output
(8 ohms 20 Hz−20 kHz, THD 0.09%)
1)
FRONT
: 90 W + 90 W
1)
CENTER
: 90 W
1)
SURR
: 90 W + 90 W
SURR BACK
90 W
(8 ohms 1 kHz, THD 0.7%)
1)
FRONT
: 100 W + 100 W
1)
CENTER
: 100 W
1)
SURR
: 100 W + 100 W
SURR BACK
100 W
(8 ohms 1 kHz, THD 10%)
1)
FRONT
: 110 W + 110 W
1)
CENTER
: 110 W
1)
SURR
: 110 W + 110 W
SURR BACK
110 W
Sony Corporation
9-879-195-01
Audio Group
2004J05-1
© 2004.10
Published by Sony Engineering Corporation
SPECIFICATIONS
Models of area code SP, MY
Rated Power Output at Stereo Mode
(8 ohms 1 kHz, THD 0.7%)
Reference Power Output
2)
(8 ohms 1 kHz, THD 0.7%)
3)
1)
1) Depending on the sound field settings and the
: 90 W +
source, there may be no sound output.
2) Measured under the following conditions:
Area code
AEP, UK, SP, MY, KR
1)
AUS
: 100 W +
TW
1)
: 110 W +
STR-DB795
3) Measured under the following conditions:
Area code
KR
2)
90 W + 90 W
2)
Frequency response
1)
FRONT
: 90 W + 90 W
PHONO
1)
CENTER
: 90 W
1)
SURR
: 90 W + 90 W
MULTI CH IN, SA-CD/
1)
SURR BACK
: 90 W +
CD, MD/TAPE, DVD,
90 W
TV/SAT, VIDEO 1, 2, 3
Inputs (Analog)
PHONO
Power requirements
230 V AC, 50 Hz
240 V AC, 50 Hz
110 V AC, 60 Hz
MULTI CH IN, SA-CD/
CD, MD/TAPE, DVD,
TV/SAT, VIDEO 1, 2, 3
FM STEREO FM/AM PECEIVER
AEP Model
UK Model
E Model
Australian Model
Power requirements
220 V AC, 50 Hz
RIAA equalization curve
±0.5 dB
10 Hz − 100 kHz
+0.5/−2 dB (when
ANALOG DIRECT is
selected)
Sensitivity: 2.5 mV
Impedance: 50 kilohms
3)
S/N
: 86 dB
4)
(A, 2.5 mV
)
Sensitivity: 150 mV
Impedance: 50 kilohms
4)
S/N
: 96 dB
5)
(A, 150 mV
)
– Continued on next page –

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  • Page 1 (A, 150 mV SURR : 110 W + 110 W SURR BACK : 110 W + – Continued on next page – 110 W FM STEREO FM/AM PECEIVER Sony Corporation 9-879-195-01 Audio Group 2004J05-1 © 2004.10 Published by Sony Engineering Corporation...
  • Page 2 STR-DB795 AM tuner section 4) INPUT SHORT. Power consumption (during standby mode) 0.3 W (when “POWER 5) Weighted network, input level. Tuning range SAVE” in the Models of area code AEP, UK, SP, MY, TW, KR, AUS CUSTOMIZE menu is set 531 −...
  • Page 3 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: Table Of Contents

    STR-DB795 TABLE OF CONTENTS SERVICING NOTES EXPLODED VIEWS ..........5 7-1. Case Section ..............68 GENERAL 7-2. Chassis Section-1 ............69 ..............7 7-3. Chassis Section-2 ............70 7-4. Main Block Section ............71 DISASSEMBLY 7-5. MAIN Board Block ............72 3-1.

  • Page 5: Servicing Notes

    STR-DB795 SECTION 1 SERVICING NOTES • MODEL IDENTIFICATION UNLEADED SOLDER Boards requiring use of unleaded solder are printed with the lead- – Back Panel – free mark (LF) indicating the solder contains no lead. (Caution: Some printed circuit boards may not come printed with...
  • Page 6 STR-DB795 SERVICE POSITION [Connecting the clip for GND] When checking without back panel, it is necessary to connect the clip for GND to a chassis. AU-IN board (JW101) clip It is necessary to remove cord bushing from back panel.

  • Page 7: General

    STR-DB795 SECTION 2 This section is extracted from instruction manual. GENERAL Main unit INPUT MODE 8 MENU ws PHONES jack wd ALPHABETICAL ORDER NUMBERS AND SYMBOLS PRESET TUNING −/+ ql MOVIE qf INPUT SELECTOR qs A.F.D. qg 2CH qh IR receptor 1...
  • Page 8 2CH rk Receiver Selects 2CH SYSTEM Receiver/ Turns off the receiver STEREO mode. STANDBY TV/VCR/ and other Sony audio/ >10/11 ef (Press AV Satellite tuner/ video components. CD player/ Selects track numbers ?/1 1 and CD player/ VCD player/ over 10.

  • Page 9: Disassembly

    STR-DB795 SECTION 3 DISASSEMBLY • This set can be disassembled in the order shown below. 3-1. DISASSEMBLY FLOW 3-2. CASE (414535) (Page 10) 3-3. COMP-V BOARD (Page 10) 3-4. BACK PANEL BLOCK (Page 11) 3-5. MAIN BLOCK (Page 11) 3-6. DIGITAL BOARD 3-7.

  • Page 10: Case (414535)

    STR-DB795 Note: Follow the disassembly procedure in the numerical order given. 3-2. CASE (414535) 1 two screws (BVTP3 × 8) 3 two screws (flat head) 7 case (414535) 4 two screws 2 two screws (flat head) (flat head) 3-3. COMP-V BOARD...

  • Page 11: Back Panel Block

    STR-DB795 3-4. BACK PANEL BLOCK 5 two screws (BVTP3 × 8) 3 connector (CN902) 6 two screws (BVTP3 × 8) 2 connector (CN901) 7 three screws (BVTP3 × 8) 1 connector (CN2) 8 six screws (BVTP3 × 8) 9 five screws (BV3 ×...

  • Page 12: Digital Board

    STR-DB795 3-6. DIGITAL BOARD 3 connector (CN1107) 1 two connectors 2 connector (CN1110, CN1111) (CN1106) 5 DIGITAL board 4 two connectors (CN402, 403) 3-7. STAY 3/STAY 4/SP-B/SP-A/S-VIDEO/VIDEO/VIDEO-AU/AU-IN BOARD 6 STAY 4 board 5 connector (CN451) 2 connector (CN447) 4 connector (CN450)

  • Page 13: Main Board

    STR-DB795 3-8. MAIN BOARD 4 A CLASS board 1 six connectors (CN421, 401, 601, 651, 501, 420) 3 connector (CN951) 2 two connectors (CN2701, 2703) 5 connector (CN423) 6 connector (CN416) 7 connector (CN409) 9 heatsink block 0 MAIN board...

  • Page 14: Test Mode

    STR-DB795 SECTION 4 TEST MODE TUNER FACTORY PRESET MODE SWAP ALL MODE All preset contents are reset to the default setting. Procedure: 1. While pressing the [PRESET TUNING +] and [A.F.D.] buttons, Procedure: 1. While pressing the [MUSIC] and [PRESET TUNING --] buttons, press the button to turn on the main power.

  • Page 15: Electrical Adjustments

    STR-DB795 SECTION 5 ELECTRICAL ADJUSTMENTS BIAS ADJUSTMENT Condition: – SBL BOARD (Component Side) – input signal: no signal (no load) volume: minimum Connection digital voltmeter CN732 CN432 (CN482, 532, 582, 632, 682, 732) pin 1 RV731 – CN432 (CN482, 532, 582, 632, 682, 732) pin 2 Procedure: 1.
  • Page 16 STR-DB795 MEMO...

  • Page 17: Diagrams

    STR-DB795 SECTION 6 DIAGRAMS 6-1. BLOCK DIAGRAM – TUNER/VIDEO Section – TU301 TUNER UNIT TUNER-L COAXIAL (Page 19) L CH FM 75 ANTENNA R CH R-CH SYSTEM CONTROLLER IC1703 (1/6) J351 (1/2) (AEP, UK) J351(2/2) RDS-DATA 47 RDS.DATA COMPONENT RDS-INT...

  • Page 18: Block Diagram - Audio Dsp Section

    STR-DB795 6-2. BLOCK DIAGRAM – AUDIO DSP Section – SOURCE-L (Page 19) S-RAM • R-CH is omitted due to same as L-CH. IC1202 D0 – D15 A0 – A15 • SIGNAL PATH 7 – 10, 13 – 16, 5 – 1, 44 – 42, 29 –...

  • Page 19: Block Diagram - Audio Control Section

    STR-DB795 6-3. BLOCK DIAGRAM – AUDIO CONTROL Section – J101 FRONT 5.1FL AUDIO SELECTOR IC173 12 5.1SL SURR VRIN LINE AMP ANALOG FLOUT BUFFER IC110 (Page 20) TRIM MULTI CH IN IC402 CENTER 28 5.1 C BUFFER IC171 SUB WOOFER 15 5.1SW...

  • Page 20: Block Diagram - Audio Amp Section

    STR-DB795 6-4. BLOCK DIAGRAM – AUDIO AMP Section – J1086 R-CH PHONES RY806 RELAY DRIVE TM699 Q823 BIAS BOOSTER PRE DRIVE Q2004, 2005 Q402 (Page 19) – Q2001, 2003 RV431 RY449 D411 CURRENT BIAS FRONT A – DETECT BIAS Q431, 434...

  • Page 21: Block Diagram - Display/Key Control Section

    STR-DB795 6-5. BLOCK DIAGRAM – DISPLAY/KEY CONTROL Section – SYSTEM CONTROLLER IC1703 (5/6) REMOTE ROTARY +/–.JOG (4A) CONTROL 63 SIRCS ENCODER MENU RECEIVER +/–.JOG (4B) RV1051 IC1051 ROTARY D1603 +/–.JOG (3A) J2305 ENCODER –/+ 86 CONTROL.A1.IN +/–.JOG (3B) RV1052 CONTROL A1 I/O BUFFER 87 CONTROL.A1.OUT...

  • Page 22: Block Diagram - Power Supply Section

    STR-DB795 6-6. BLOCK DIAGRAM – POWER SUPPLY Section – S901 IMPEDANCE SELECTOR 8Ω T901 EXCEPT Singapore MAIN POWER Singapore Malaysia models TRANSFORMER 4Ω Malaysia models REGULATOR B– Q824 F905 BIAS LIMITER SWITCH RECT TUNER +10V B– Q2602 D914 F906 +3.3V...
  • Page 23 STR-DB795 • Note for Printed Wiring Boards and Schematic Diagrams • Circuit Boards Location Note on Printed Wiring Board: Note on Schematic Diagram: • X : parts extracted from the component side. AC board • All capacitors are in µF unless otherwise noted. (p: pF) •...

  • Page 24: Printed Wiring Board − Digital Section (1/2)

    STR-DB795 • See page 23 for Circuit Boards Location. 6-7. PRINTED WIRING BOARD – DIGITAL Section (1/2) – :Uses unleaded solder. • Semiconductor Location Ref. No. Location D1001 D1101 D1601 J-11 D1603 E-10 D1604 I-13 D1905 D1906 D1907 DIGITAL BOARD...

  • Page 25: Printed Wiring Board − Digital Section (2/2)

    STR-DB795 • See page 23 for Circuit Boards Location. 6-8. PRINTED WIRING BOARD – DIGITAL Section (2/2) – :Uses unleaded solder. • Semiconductor Location Ref. No. Location ANTENNA D1501 H-12 D1502 H-12 COAXIAL FM 75Ω D1602 IC1104 E-14 IC1105 F-14...

  • Page 26: Schematic Diagram − Digital Section (1/4)

    STR-DB795 • See page 54 for Waveforms. • See page 55 for IC Block Diagrams. • See page 62 for IC Pin Function Description. 6-9. SCHEMATIC DIAGRAM – DIGITAL Section (1/4) – (1/4) IC1104 TORX141L R1127 OPTICAL R1120 DVD IN...

  • Page 27: Schematic Diagram − Digital Section (2/4)

    STR-DB795 • See page 54 for Waveforms. • See page 62 for IC Pin Function Description. 6-10. SCHEMATIC DIAGRAM – DIGITAL Section (2/4) – (2/4) FB1201 JR1121 FB1202 (Page 26) C1213 C1214 C1218 R1204 100p C1231 C1212 C1205 S-RAM C1203...

  • Page 28: Schematic Diagram − Digital Section (3/4)

    STR-DB795 • See page 54 for Waveform. • See page 55 for IC Block Diagrams. 6-11. SCHEMATIC DIAGRAM – DIGITAL Section (3/4) – TU301 TUNER UNIT (SUPPLIED WITH THE ASSEMBLED BLOCK) COAXIAL (Page 27) FM 75Ω ANTENNA IC1905 IC1902 2933...

  • Page 29: Schematic Diagram − Digital Section (4/4)

    STR-DB795 • See page 54 for Waveforms. • See page 62 for IC Pin Function Description. 6-12. SCHEMATIC DIAGRAM – DIGITAL Section (4/4) – (Page 26) D1907 1SR154-400 TE-25 (4/4) C1905 CN1106 (Page 33) (EXCEPT AEP,UK) +5V.D(+8V) +5V.FL C1617 CN1111 0.01...

  • Page 30: Printed Wiring Boards - Video Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-13. PRINTED WIRING BOARDS – VIDEO Section – :Uses unleaded solder. C301 J302 MONITOR OUT VIDEO BOARD VIDEO-AU BOARD R301 C302 R302 (CHASSIS) R256 R211 VIDEO 1 IN VIDEO 1 IN...

  • Page 31: Schematic Diagram - Video Section

    STR-DB795 • See page 55 for IC Block Diagrams. 6-14. SCHEMATIC DIAGRAM – VIDEO Section – C215 2200p CN202 (CHASSIS) E304 V3 R C304 (CHASSIS) 2200p E302 V3 GND V3 L C302 (CHASSIS) 2200p J202 (Page 33) J302 CN301 CN201...

  • Page 32: Printed Wiring Boards - S-Video Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-15. PRINTED WIRING BOARDS – S-VIDEO Section – :Uses unleaded solder. VIDEO 3 INPUT DIGITAL COMP-V BOARD DIGITAL BOARD J1086 OPTICAL S-VIDEO CN351 CN1111 J1092 J1091 PHONES (Page 34) (Page 25)

  • Page 33: Schematic Diagram - S-Video Section

    STR-DB795 • See page 55 for IC Block Diagrams. 6-16. SCHEMATIC DIAGRAM – S-VIDEO Section – IC1081 GP1FM313RZ C1081 DIGITAL OPTICAL RECEIVER VIDEO 3 INPUT DIGITAL OPTICAL R1081 C1088 J1086 PHONES CN1081 EP1086 VCC(3.3V) OPT GND C1098 C1097 (CHASSIS) 2200p...

  • Page 34: Printed Wiring Board - Comp-V Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-17. PRINTED WIRING BOARD – COMP-V Section – :Uses unleaded solder. • Semiconductor Location Ref. No. Location J351 D351 D352 COMPONENT VIDEO IC370 MONITOR IC371 DVD IN TV/SAT IN IC372 Q351...

  • Page 35: Schematic Diagram - Comp-V Section

    STR-DB795 • See page 54 for Waveform. • See page 55 for IC Block Diagrams. 6-18. SCHEMATIC DIAGRAM – COMP-V Section – R367 L375 22uH (EXCEPT TW,KR) 33uH (TW,KR) C386 X370 3.5795MHz (TW,KR) CNP352 4.43MHz (EXCEPT TW,KR) RESET R363 R371...

  • Page 36: Printed Wiring Board - Au-In Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-19. PRINTED WIRING BOARD – AU-IN Section – :Uses unleaded solder. • Semiconductor Location Ref. No. Location STAY 3 BOARD IC101 CN2707 IC110 (Page 46) IC111 AU-IN BOARD IC112 IC131 IC171...

  • Page 37: Schematic Diagram - Au-In Section

    STR-DB795 • See page 55 for IC Block Diagrams. 6-20. SCHEMATIC DIAGRAM – AU-IN Section – C135 C137 100p R145 C161 (CHASSIS) 0.01 R131 2.2k CN104 C145 R141 J151 IC131(1/2) M5218AP-22 C131 100P R133 R135 R137 R139 100k 8.2k 100k...

  • Page 38: Printed Wiring Board - Main Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-21. PRINTED WIRING BOARD – MAIN Section – :Uses unleaded solder. (Page 36) (Page 36) (Page 30) (Page 30) (Page 50) (Page 32) (Page 32) (Page 46) (Page 46) S-VIDEO BOARD...

  • Page 39: Schematic Diagram − Main Section (1/3)

    STR-DB795 • See page 55 for IC Block Diagram. 6-22. SCHEMATIC DIAGRAM – MAIN Section (1/3) – (1/3) C818 CN405 +15V R841 Q824 CN402 2SC1815YGR R828 -15V 4.7k C817 STOP STOP C819 JWH004 REGULATOR PW-RY PW-RY C814 C815 F-LAT FUN-LAT...

  • Page 40: Schematic Diagram − Main Section (2/3)

    STR-DB795 6-23. SCHEMATIC DIAGRAM – MAIN Section (2/3) – (Page 39) CN411 SR-RY FB-RY (2/3) FA-RY 24V(RY) (Page 47) CN410 CN416 (Page 45) JWH002 (Page 47) R593 (Page 47) CN412 R812 2.2k Q582 2SA988 R816 Q807 R588 CURRENT 2SC2785TP-FEK DETECT...

  • Page 41: Schematic Diagram − Main Section (3/3)

    STR-DB795 6-24. SCHEMATIC DIAGRAM – MAIN Section (3/3) – (3/3) R586 4.7k R562 R636 R632 C582 4.7k 2.2k 220p R582 2.2k C632 220p Q634 Q584 2SA1115 2SA1115 Q552 Q602 MN2488 BIAS R612 BIAS MN2488 BOOSTER Q631 CN632 Q583 CN582 BOOSTER...

  • Page 42: Printed Wiring Board - A Class Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-25. PRINTED WIRING BOARD – A CLASS Section – :Uses unleaded solder. (Page 38) (Page 38) (Page 38) (Page 38) (Page 38) (Page 38) MAIN BOARD MAIN BOARD MAIN BOARD MAIN BOARD...

  • Page 43: Schematic Diagram - A Class Section

    STR-DB795 6-26. SCHEMATIC DIAGRAM – A CLASS Section – CN2004 C2410 2200p 100V CN2401 SHORT C2310 2200p 100V BIAS+ C2409 R2419 C2408 2200p 100V 220p 100V BIAS- R2014 R2214 R2414 C2508 (Page 45) 220p 100V R2416 R2519 Q2005 Q2205 Q2405...

  • Page 44: Printed Wiring Board - Sbl Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-27. PRINTED WIRING BOARD – SBL Section – :Uses unleaded solder. • Semiconductor Location Ref. No. Location D2701 Q702 A CLASS BOARD A CLASS BOARD Q703 CN2005 CN2004 Q731 (Page 42)

  • Page 45: Schematic Diagram - Sbl Section

    STR-DB795 6-28. SCHEMATIC DIAGRAM – SBL Section – Q2705 2SA949 R2714 BIAS C2708 Q2704 Q2706 R2716 Q702 Q703 220p 2SA992 2SC2229 MN2488 MP1620 R2713 R2715 100V BIAS BIAS BOOSTER BOOSTER R2719 D2701 R714 MTZJ5.6B 0.22X2 C731 R713 C2705 R712 C2707...

  • Page 46: Printed Wiring Board − Sp Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-29. PRINTED WIRING BOARDS – SP Section – :Uses unleaded solder. SP-B BOARD CN451 SP-A BOARD (CHASSIS) RY549 RY699 CN447 CN450 R548 – C599 SURR R598 BACK – L549 SURR C598 L699 –...

  • Page 47: Schematic Diagram - Sp Section

    STR-DB795 6-30. SCHEMATIC DIAGRAM – SP Section – C549 0.01 L549 RY549 R548 CN449 R549 (CHASSIS) C448 470p R598 C598 470p L599 C599 0.01 D549 R599 1SS133 (Page 40) R547 CN448 SURR SR-RY C443 0.01 FB-RY L449 RY444 FA-RY TM449...

  • Page 48: Printed Wiring Boards - Display Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-31. PRINTED WIRING BOARDS – DISPLAY Section – :Uses unleaded solder. DIRECT BOARD R1057 R1060 S1041 − 1047, BOARD CN1062 S1050 − 1054, S1062 S1056, 1057, 1061, S1061 MULTI S1062, 1065...

  • Page 49: Schematic Diagram − Display Section

    STR-DB795 6-32. SCHEMATIC DIAGRAM – DISPLAY/FUN/VOL/DIRECT Boards – RV1051 RV1052 ROTARY ENCODER ROTARY ENCODER R1035 R1036 4.7k MENU R1032 REMOTE CN1001 CONTROL RECEIVER D1071 C1071 AC 6V C1031 HZ6.8BP IC1051 R1037 NJL24H400A 4.7k R1033 AC 6V POWER R1059 Q1031 Q1032...

  • Page 50: Printed Wiring Boards − Dc Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-33. PRINTED WIRING BOARDS – DC1/DC2/4/8 Boards – :Uses unleaded solder. • Semiconductor Location A CLASS BOARD (Page 42) Ref. No. Location CN2003 D902 D903 DC2 BOARD D904 CN951 R960 D905...

  • Page 51: Schematic Diagram − Dc Section

    STR-DB795 6-34. SCHEMATIC DIAGRAM – DC1/DC2/4/8 Boards – C958 CN953 0.22 -15V C952 C956 +15V C960 C962 0.22 0.22 (Page 40) -5V REGULATOR +5V REGULATOR +5V REGULATOR CN952 IC951 IC952 IC953 TA79005 7805 7805 -5V.V +15V REGULATOR IC955 V.GND -15V REGULATOR...

  • Page 52: Printed Wiring Boards − Ac Section

    STR-DB795 • See page 23 for Circuit Boards Location. 6-35. PRINTED WIRING BOARDS – AC/PRI/SEC1/SEC3 Boards – :Uses unleaded solder. DC1 BOARD 4-8 BOARD CN906 CN901 (AC IN) (Page 50) (Page 50) SEC (1) BOARD AC BOARD CN52 CN53 (16)

  • Page 53: Schematic Diagram − Ac Section

    STR-DB795 6-36. SCHEMATIC DIAGRAM – AC/PRI/SEC1/SEC3 Boards – 10A 125V (TW) T4AL 250V (EXCEPT TW) T901 CN52 MAIN POWER TRANSFORMER HI-B LO-B 2200 2.2k LO-A 2SC2785 HI-A AC POWER (Page 51) DETECT CN53 CN51 +24V STOP -24V 2SC2785 RELAY P.RY...
  • Page 54 STR-DB795 • Waveforms – DIGITAL Board – – COMP-V Board – IC1101 qd (CKOUT) IC1201 qg (LRCKI1), IC1401 qf (BCK) IC1502 3 (LRCK) IC371 4 (XTAL) (VIDEO 1 wk (LRCKI2) mode) (EXCEPT TW, KR) 3.6 Vp-p 4.2 Vp-p 5.4 Vp-p 3.6 Vp-p...
  • Page 55 STR-DB795 • IC Block Diagrams – DIGITAL Board – IC1101 LC89056W-E AUDIO C BIT PA/PB DETECT DETECT EMPHA SAMPLING XSEL FREQUENCY MICROCOMPUTER MODE0 INTERFACE MODE1 LOCK XOUT X’ TAL DGND DETECT XMCK DVDD 19 DVDD 18 DGND XSTATE DATAO LRCK...
  • Page 56 STR-DB795 IC1401 PCM1800E/2K 15 14 13 DIGITAL ∑ MODULATOR 1/64 SERIAL I/O DECIMATION INTERFACE FILTER & & MODE/FORMAT LOW-CUT CONTROL DIGITAL ∑ FILTER MODULATOR SINGLE-END SINGLE-END CLOCK/ DEFERENTIAL REFERENCE DEFERENTIAL TIMING CONTROL RESET/ CONVERTER CONVERTER POWER CONTROL IC1501 PCM1604Y-2/2K 36 35 34 33...
  • Page 57 STR-DB795 IC1502 PCM1748E/2K 15 14 ZERO DETECT SYSTEM FUNCTION OUTPUT AMP AND CLOCK CONTROL LOW-PASS FILTER MANAGER CONVERTER INTERFACE 8 TIME OVER SAMPLING ENHANCED DIGITAL FILTER MULTI-LEVEL WITH SYSTEM DELTA-SIGMA FUNCTION CLOCK MODULATOR CONTROLLER SERIAL OUTPUT AMP AND INPUT CONVERTER...
  • Page 58 STR-DB795 – VIDEO-AU Board – IC201 TC9273N-014 10BIT 10BIT LATCH LATCH CIRCUIT CIRCUIT (L-CH) (R-CH) LEVEL SHIFT & SHIFT REGISTER DATA – S-VIDEO Board – IC850, 851 TC9273N-014 IC852 LA7213 SYNC V-SYNC VOUT1 75Ω DRIVER VIN5 16 V+ 75Ω VIN4...
  • Page 59 STR-DB795 – COMP-V Board – IC370 TC90A69N BIAS VDD1 TESTI1 VSS2 DINAMIC COMB FILTER 28 VB1 LINE LINE INTERPOLATION 27 COUT YCIN CONVERTER MEMORY MEMORY CONVERTER C-NLC 8fsc 26 VSS1 SYNC CLAMP DELAY CORING Ped. V-ENHANCER CORING 25 YOUT DELAY...
  • Page 60 STR-DB795 – AU-IN Board – IC101 TC9274N-017 IC173 TC9273F-012 (EL) 10BIT 10BIT LATCH LATCH CIRCUIT CIRCUIT (L-CH) (R-CH) 18BIT 18BIT LATCH LATCH CIRCUIT CIRCUIT (L-CH) (R-CH) 30 S12 LEVEL SHIFT & SHIFT REGISTER 29 S13 DATA 28 S14 27 S15...
  • Page 61 STR-DB795 – MAIN Board – IC401, 501, 601, 651 CXD9725M 28 NC TRIM VOLUME TRIM VOLUME 26 VDD 0-+24dB/ 0-+24dB/ 1dB STEP 1dB STEP TRIM 26 TRIM 5 to 25 DECODER 5 to 25 DECODER & & LATCH CIRCUIT LATCH CIRCUIT...
  • Page 62 STR-DB795 • IC Pin Function Description DIGITAL BOARD IC1101 LC89056W-E (DIGITAL AUDIO INTERFACE RECEIVER) Pin No. Pin Name Description DISEL Selection signal input terminal of data input terminal Fixed at "L" in this set DOUT Digital data output to the external output terminal...
  • Page 63 STR-DB795 DIGITAL BOARD IC1201 CXD9718BQ (AUDIO DIGITAL SIGNAL PROCESSOR) Pin No. Pin Name Description Ground terminal XRST System reset signal input from the system controller "L": reset EXTIN Master clock signal input terminal Not used Sampling frequency selection signal input terminal Not used VDDI Power supply terminal (+2.5V)
  • Page 64 STR-DB795 Pin No. Description Pin Name WMD0 External memory wait mode setting terminal Fixed at "H" in this set PAGE2 External memory page selection signal output terminal Not used Ground terminal 52, 53 PAGE1, PAGE0 External memory page selection signal output terminal Not used...
  • Page 65 STR-DB795 DIGITAL BOARD IC1703 MB91154PFV-G-121-BNDE1 (SYSTEM CONTROLLER) Pin No. Description Pin Name PW RY Relay drive signal output terminal (for main power) "H": relay on H/P RY Relay drive signal output terminal (for headphone) "H": relay on SP.A.RY Relay drive signal output terminal (for front A speaker) "H": relay on SP B RY Relay drive signal output terminal (for front B speaker) "H": relay on...
  • Page 66 STR-DB795 Pin No. Pin Name Description Not used 52 to 54 MD2 to MD0 Not used System reset signal input from the reset signal generator "L": reset For several hundreds msec. RSTX after the power supply rises, "L" is input, then it changes to "H"...
  • Page 67 STR-DB795 Pin No. Pin Name Description Power supply terminal (+3.3V) Ground terminal UP CON SDA Serial data output to the video sync separator UP CON SCL Serial data transfer clock signal output to the video sync separator Ground terminal HDOUT...

  • Page 68: Exploded Views

    STR-DB795 SECTION 7 EXPLODED VIEWS NOTE: • -XX and -X mean standardized parts, so they • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are may have some difference from the original are seldom required for routine service.

  • Page 69: Chassis Section-1

    STR-DB795 7-2. CHASSIS SECTION-1 supplied #3 #3 not supplied supplied (4-8 board) TU301 chassis section The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified. Ref. No. Part No.

  • Page 70: Chassis Section-2

    STR-DB795 7-3. CHASSIS SECTION-2 not supplied (VIDEO-AU board) supplied supplied main block section supplied AC board section Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-863-053-11 SP-B BOARD 1-773-002-11 WIRE (FLAT TYPE) (15 CORE) (AEP, UK)

  • Page 71: Main Block Section

    STR-DB795 7-4. MAIN BLOCK SECTION Q702 supplied Q703 IC952 IC953 IC955 IC954 MAIN board section Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-1054-419-A SBL BOARD, COMPLETE IC954 8-759-245-87 IC TA79015S 3-905-609-11 SCREW (TRANSISTOR) IC955 8-759-231-59 IC TA7815S...

  • Page 72: Main Board Block

    STR-DB795 7-5. MAIN BOARD BLOCK Q552 Q553 Q502 Q503 Q652 Q653 Q602 Q603 Q452 Q453 Q402 Q403 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark A-1054-310-A MAIN BOARD, COMPLETE Q552 6-702-390-01 TRANSISTOR MN2488-OPY-MK Q402 6-702-390-01 TRANSISTOR MN2488-OPY-MK...

  • Page 73: Chassis Section-3

    STR-DB795 7-6. CHASSIS SECTION-3 F904 F906 F903 (SP, MY) F905 T901 not supplied (DC 1 board) not supplied front panel section The components identified by mark 0 or dotted line with mark 0 are critical for safety. Replace only with part number specified.

  • Page 74: Front Panel Block-1

    X-4955-967-1 LID ASSY (GOLD) 2-050-931-31 FRONT PANEL (AL DB795) (SILVER) (AUS) X-4955-968-2 LID ASSY (SILVER) 2-050-931-41 FRONT PANEL (AL DB795) (GOLD) 4-942-568-41 EMBLEM (No. 5), SONY (BLACK) (SP, MY, KR) 4-942-568-51 EMBLEM (No. 5), SONY (GOLD) 3-064-084-01 CLAMP (FCR-60), FLAT 3-704-515-22 SCREW (BV/RING) (BLACK) 4-942-568-61 EMBLEM (No.

  • Page 75: Front Panel Block-2

    STR-DB795 7-8. FRONT PANEL BLOCK-2 not supplied (FUN board) not supplied (VOL board) supplied with RV1060 supplied with RV1051, 1052 supplied with RV1061 not supplied (DIRECT board) supplied panel base section Ref. No. Part No. Description Remark Ref. No. Part No.

  • Page 76: Front Panel Block-3

    STR-DB795 7-9. FRONT PANEL BLOCK-3 not supplied (HP-V3 board) not supplied supplied with J1086 not supplied not supplied Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 4-245-438-02 PLATE, INDICATION (BLACK) 4-245-436-31 BUTTON (MENU) (SILVER) 4-245-438-12 PLATE, INDICATION (GOLD, SILVER) 4-951-620-01 SCREW (2.6X8), +BVTP...

  • Page 77: Electrical Parts List

    STR-DB795 SECTION 8 A CLASS ELECTRICAL PARTS LIST NOTE: • Due to standardization, replacements in the • Items marked “*” are not stocked since they The components identified by mark 0 or dotted line with mark 0 are parts list may be different from the parts are seldom required for routine service.
  • Page 78 STR-DB795 A CLASS Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark D2101 8-719-109-89 DIODE RD5.6ESB2 0 R2014 1-249-406-11 CARBON 1/4W F 0 R2015 D2201 8-719-109-89 DIODE RD5.6ESB2 1-249-406-11 CARBON 1/4W F D2301 8-719-109-89 DIODE RD5.6ESB2 D2401 8-719-109-89 DIODE RD5.6ESB2...
  • Page 79 STR-DB795 A CLASS AU-IN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark CN51 1-778-227-41 CONNECTOR, BOARD TO BOARD 6P R2403 1-259-416-61 CARBON 1/6W R2404 1-259-430-61 CARBON 1.2K 1/6W < DIODE > R2405 1-259-444-61 CARBON 4.7K 1/6W...
  • Page 80 STR-DB795 AU-IN COMP-V Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C131 1-128-809-11 CERAMIC 100PF R112 1-259-468-61 CARBON 1/6W C132 1-128-809-11 CERAMIC 100PF R113 1-259-468-61 CARBON 1/6W C133 1-128-813-11 CERAMIC 220PF R114 1-259-468-61 CARBON 1/6W C134...
  • Page 81 STR-DB795 COMP-V Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C357 1-127-876-11 CERAMIC 0.01uF IC372 6-803-031-01 IC NJM2268D C360 1-128-818-11 CERAMIC 560PF C361 1-128-816-11 CERAMIC 390PF < JACK > C362 1-112-119-11 CAP, ELECT 470uF C363 1-128-801-11 CERAMIC...
  • Page 82 STR-DB795 COMP-V Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R392 1-249-426-11 CARBON 5.6K 1/4W (TW, KR) D915 6-500-522-11 DIODE 10EDB40-TA2B5 D916 6-500-522-11 DIODE 10EDB40-TA2B5 < RELAY > < EARTH TERMINAL > RY351 1-755-184-11 RELAY RY352...
  • Page 83 STR-DB795 DIGITAL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > C1202 1-164-156-11 CERAMIC CHIP 0.1uF C1203 1-164-156-11 CERAMIC CHIP 0.1uF R954 1-249-417-11 CARBON 1/4W C1204 1-164-156-11 CERAMIC CHIP 0.1uF R955 1-249-415-11 CARBON 1/4W...
  • Page 84 STR-DB795 DIGITAL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C1512 1-164-156-11 CERAMIC CHIP 0.1uF C1513 1-112-143-11 CAP, ELECT 10uF C1671 1-164-156-11 CERAMIC CHIP 0.1uF C1672 1-164-156-11 CERAMIC CHIP 0.1uF C1514 1-164-156-11 CERAMIC CHIP 0.1uF C1673 1-164-156-11 CERAMIC CHIP 0.1uF...
  • Page 85 STR-DB795 DIGITAL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark FB1502 1-469-152-11 FERRITE, EMI (SMD) (2012) < SHORT > FB1503 1-414-813-11 FERRITE, EMI (SMD) (2012) FB1601 1-469-152-11 FERRITE, EMI (SMD) (2012) L1901 1-216-864-11 SHORT CHIP FB1602 1-469-152-11 FERRITE, EMI (SMD) (2012) FB1603 1-469-152-11 FERRITE, EMI (SMD) (2012) <...
  • Page 86 STR-DB795 DIGITAL Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R1219 1-216-813-11 METAL CHIP 1/10W R1220 1-216-813-11 METAL CHIP 1/10W R1573 1-216-821-11 METAL CHIP 1/10W R1221 1-216-813-11 METAL CHIP 1/10W R1574 1-216-845-11 METAL CHIP 100K 1/10W...
  • Page 87 STR-DB795 DIGITAL DIRECT DISPLAY Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R1644 1-216-821-11 METAL CHIP 1/10W R1702 1-216-833-11 METAL CHIP 1/10W R1645 1-216-821-11 METAL CHIP 1/10W R1703 1-216-833-11 METAL CHIP 1/10W R1646 1-216-821-11 METAL CHIP...
  • Page 88 STR-DB795 DISPLAY HP-V3 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C1011 1-127-888-11 CERAMIC 0.1uF R1044 1-249-421-11 CARBON 2.2K 1/4W C1012 1-127-888-11 CERAMIC 0.1uF R1045 1-247-847-91 CARBON 4.7K 1/4W C1013 1-127-888-11 CERAMIC 0.1uF R1046 1-249-429-11 CARBON...
  • Page 89 STR-DB795 HP-V3 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < EARTH TERMINAL > C563 1-127-876-11 CERAMIC 0.01uF C566 1-136-161-00 MYLAR 0.047uF * EP1086 1-537-738-21 TERMINAL, EARTH C567 1-136-165-00 MYLAR 0.1uF * EP1091 1-537-738-21 TERMINAL, EARTH...
  • Page 90 STR-DB795 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark * CN410 1-770-723-11 CONNECTOR, BOARD TO BOARD 8P IC651 6-702-387-01 IC CXD9725M IC652 8-759-167-88 IC NJM4565D CN411 1-770-010-21 CONNECTOR, BOARD TO BOARD 4P IC804 8-759-243-51 IC TC74ACT08P...
  • Page 91 STR-DB795 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark < RESISTOR > R543 1-259-468-61 CARBON 1/6W R401 1-259-448-61 CARBON 6.8K 1/6W R551 1-259-448-61 CARBON 6.8K 1/6W R402 1-259-428-61 CARBON 1/6W R552 1-259-428-61 CARBON 1/6W R403...
  • Page 92 STR-DB795 MAIN Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R702 1-259-428-61 CARBON 1/6W RY807 1-755-483-11 RELAY ************************************************************ R703 1-259-476-61 CARBON 100K 1/6W R715 1-259-468-61 CARBON 1/6W 1-689-173-11 PRI BOARD R716 1-259-476-61 CARBON 100K 1/6W *********...
  • Page 93 STR-DB795 SEC (1) SEC (3) SP-A SP-B Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R2705 1-259-444-61 CARBON 4.7K 1/6W D549 8-719-991-33 DIODE 1SS133T-77 R2706 1-259-430-61 CARBON 1.2K 1/6W R2707 1-259-422-61 CARBON 1/6W < COIL >...
  • Page 94 STR-DB795 SP-B STAY 3 STAY 4 S-VIDEO Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark C863 1-127-888-11 CERAMIC 0.1uF < COIL > C864 1-136-165-00 MYLAR 0.1uF L649 1-420-872-52 COIL, AIR-CORE C867 1-127-888-11 CERAMIC 0.1uF L699 1-420-872-52 COIL, AIR-CORE...
  • Page 95 STR-DB795 S-VIDEO VIDEO VIDEO-AU Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark R867 1-249-429-11 CARBON 1/4W C213 1-128-809-11 CERAMIC 100PF C214 1-127-876-11 CERAMIC 0.01uF < RELAY > C215 1-127-868-11 CERAMIC 2200PF RY850 1-755-359-11 RELAY < CONNECTOR >...
  • Page 96 STR-DB795 Ref. No. Part No. Description Remark Ref. No. Part No. Description Remark 1-773-339-11 WIRE (FLAT TYPE) (31 CORE) 2-148-932-31 INSTRUCTION MANUAL (DB795 EXT) 0 F1 1-532-504-51 FUSE (T4AL/250V) (EXCEPT TW) (RUSSIAN) (AEP) 0 F1 1-533-312-11 FUSE, GLASS CYLINDRICAL (DIA.5)
  • Page 97 STR-DB795 MEMO...
  • Page 98 STR-DB795 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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