Denon AVR-1705 Service Manual
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Denon AVR-1705 Service Manual

Av surround receiver/amplifier
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MODEL
AV SURROUND RECEIVER/AMPLIFIER
For purposes of improvement, specifications and
design are subject to change without notice.
Please use this service manual with referring to the
operating instructions without fail.
Some illustrations using in this service manual are
slightly different from the actual set.
SERVICE MANUAL
AVR-1705/685
16-11, YUSHIMA 3-CHOME, BUNKYO-KU, TOKYO 113-0034 JAPAN
For U.S.A., Canada, Europe,
China & Taiwan R.O.C. model
Ver. 1
X0202 V.01 DE/CDM 0406

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Summary of Contents for Denon AVR-1705

  • Page 1 For U.S.A., Canada, Europe, China & Taiwan R.O.C. model Ver. 1 SERVICE MANUAL AVR-1705/685 MODEL AV SURROUND RECEIVER/AMPLIFIER For purposes of improvement, specifications and design are subject to change without notice. Please use this service manual with referring to the operating instructions without fail.
  • Page 2 AVR-1705/685 SAFETY PRECAUTIONS The following check should be performed for the continued protection of the customer and service technician. LEAKAGE CURRENT CHECK Before returning the unit to the customer, make sure you make either (1) a leakage current check or (2) a line to chassis resistance check.
  • Page 3 AVR-1705/685 DIMENSION...
  • Page 4 AVR-1705/685 CAUTION IN SERVICING Initializing AV SURROUND RECEIVER AV SURROUND RECEIVER initialization should be performed when the µcom, peripheral parts of µcom, and Digital P.W.B. are replaced. 1. Switch off the unit. 2. Hold the following SPEAKERS-A button and SPEAKERS-B button, and switch on the unit.

  • Page 5: Audio Section

    AVR-1705/685 ADJUSTMENT Audio Section Idling Current Required measurement equipment: DC Voltmeter 1. Preparation (1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature 15 °C ~ 30 °C (59 °F ~ 86 °F).

  • Page 6: Video Section

    AVR-1705/685 Video Section Component Video Level Adjustment Required measurement equipment etc.: Oscilloscope, DVD VIDEO PLAYER (ex: DVD-1500) Test disc: DVD T-S01 1. Preparation (1) Avoid direct blow from an air conditioner or an electric fan, and adjust the unit at normal room temperature 15 °C ~ 30 °C (59 °F ~ 86 °F).
  • Page 7 AVR-1705/685 Oscilloscope MONITOR OUT (Y,Cb,Cr) VR603 VR602 VR601 Video Section...
  • Page 8 AVR-1705/685 Y-S ig n a l Vol ts I R E : FLT 100.0 714 ± 50mV 10.0 -20.0 -10.0 20.0 30.0 40.0 50.0 60.0 Fig.1 Component Video Y signal Vo lt s I R E : FLT 50.0 486±50 (U.S.A.
  • Page 9 AVR-1705/685 BLOCK DIAGRAM...
  • Page 10 AVR-1705/685 LEVEL DIAGRAMS (1/2)
  • Page 11 AVR-1705/685 LEVEL DIAGRAMS (2/2)
  • Page 12 AVR-1705/685 SEMICONDUCTORS Only major semiconductors are shown, general semiconductors etc. are omitted to list. 1. IC’s CXP740096 (IC201) PI6/SO1 PI7/SI1 PE0/INT0 PE1/INT2 PE2/PWM0 PE3/PWM1 PB7/SI2 PB6/SO2 PB5/SCK2 PB4/TO2 PG0/TxD PG1/RxD PG2/EC0 PG3/EC1 PG4/EC2 TOP VIEW PG5/INT3 PG6/INT4 PG7/CINT PF0/AN4 PF1/AN5...
  • Page 13 AVR-1705/685 Pin Name Function RELAY_FRONT_B FRONT B RELAY RELAY_FRONT_A FRONT A RELAY RELAY_SURR SURROUND RELAY RELAY_CNT CENTER RELAY RELAY_H/P RELAY H/P FUNC_UP ENCODER INPUT (FUNCTION) H/P_DETECT DETECT H/P FUNC_DOWN ENCODER INPUT (FUNCTION) SURR_SB_MUTE SURROUND BACK MUTE CNT_MUTE CENTER MUTE SURR_MUTE...
  • Page 14 AVR-1705/685 Pin Name Function RDS_CLK RDS(TDA7330) CLOCK FLAG3 Special flag for ROM update FLAG2 DSP operation check flag FLAG1 NON USE FLAG0 EPROM chip select control for DSP VIDEO_SEL1 VDEO_SEL2 REMOCON REMOTE CONTROL SIGNAL INPUT (BACK UP) VDD FOR BACK UP...
  • Page 15 AVR-1705/685 ADSP-21266SKSTZ-2B (IC804) PIN 1 INDICATOR TOP VIEW ADSP-21266SKSTZ-2B Terminal Function LQFP LQFP LQFP LQFP Pin Name Pin # Pin Name Pin # Pin Name Pin # Pin Name Pin # DDINT DDINT DDEXT CLKCFG0 DDINT CLKCFG1 DDINT BOOTCFG0 DDINT...
  • Page 16 AVR-1705/685 LC89057W (IC807) EMPHA/UO AUDIO/VO XMODE RXOUT Microcontroller C bit, U bit 37 DO 36 RERR 24 SDIN 23 SLRCK Input Demodulation Data 22 SBCK Selector 21 RDATA & Selector 21 RDATA Lock Detect XMODE 20 RLRCK RX5/VI DGND 19 DVDD...
  • Page 17 AVR-1705/685 Function Pin Name XOUT X’tal osc. connecting output terminal X’tal osc. connection, external clock input terminal (24.576MHz or 12.288MHz) DVDD — Digital power DGND — Digital GND EMPHA/UO Emphasis information/U-data output/Chip address setting terminal AUDIO/VO Non-PCM detect/V-flag output/ Chip address setting terminal...
  • Page 18 AVR-1705/685 AD1837 (IC808) DVDD DVDD DBCLK CLATCH DLRCLK PD/RST AGND AGND OUTR4 TOP VIEW OUTL1 OUTL4 OUTR1 AGND AGND AVDD AVDD OUTR3 OUTL2 DVDD DVDD ODVDD ALRCLK ABCLK ASDATA CCLK CLATCH COUT MCLK PD/RST M/S AVDD AVDD DLRCLK CONTROL PORT...
  • Page 19 AVR-1705/685 TC90A69F (IC609) NJM2274R (IC614) VIEW PLL DET IIC BUS Power Save CTL 8fsc 4fsc (8fsc) CORING V-ENHANCER Vref CORING Ped. DELAY PEAKING CLIP INTERPOLATION LINE LINE Clamp MEMORY MEMORY KILLER 3 Vout Disc. DYNAMIC COMB FILTER C-N.C Bias Vsag Sync.
  • Page 20 AVR-1705/685 BA7625 (IC651) BA7626 (IC612,613,616,652,653) Monitor OUT CTL A V OUT1 LOGIC CTL E CTL B LOGIC V OUT2 CTL D CTL C MONITOR OUT V OUT 1 V OUT 2  IN 1 IN 1  IN 2 IN 2...
  • Page 21 AVR-1705/685 LH28F800BJE (IC805) SN74LV573APW (IC818,819) SN74LVC139APWR (IC820) FUNCTION TABLE (each decoder/demultiplexer) INPUTS OUTPUTS OUTPUTS SELECT...
  • Page 22 AVR-1705/685 2. FL DISPLAY 16-ST-66GNK (FL301) TUNED STEREO PHONO TUNER DVD / AUTO -2 -3 V.AUX TAPE ZONE2 PRO LOGICII DIGITAL DIGITAL ANALOG G2~G16 G12 G10 DVD / VDP TV / DBS TUNED STEREO PHONO TUNER AUTO -2 -3 V.AUX...
  • Page 23 AVR-1705/685 PRINTED WIRING BOARDS MAIN P.W.B. UNIT COMPONENT SIDE...
  • Page 24 AVR-1705/685 FOIL SIDE...
  • Page 25 AVR-1705/685 CPU CONNECT P.W.B. UNIT COMPONENT SIDE...
  • Page 26 AVR-1705/685 FOIL SIDE...
  • Page 27 AVR-1705/685 CNT P.W.B. UNIT COMPONENT SIDE...
  • Page 28 AVR-1705/685 FOIL SIDE...
  • Page 29 AVR-1705/685 PRE-AMP P.W.B. UNIT COMPONENT SIDE FOIL SIDE...
  • Page 30 AVR-1705/685 INPUT-VOL P.W.B. UNIT COMPONENT SIDE FOIL SIDE...
  • Page 31 AVR-1705/685 DSP P.W.B. UNIT COMPONENT SIDE FOIL SIDE...
  • Page 32 AVR-1705/685 VIDEO P.W.B. UNIT (for AVR-1705/685 U.S.A. & Canada model only) COMPONENT SIDE...
  • Page 33 AVR-1705/685 FOIL SIDE...
  • Page 34 AVR-1705/685 NOTE FOR PARTS LIST Part indicated with the mark " " are not always in stock and possibly to take a long period of time for supplying, or in some case supplying of part may be refused. When ordering of part, clearly indicate "1" and "I" (i) to avoid mis- supplying.
  • Page 35 AVR-1705/685 PARTS LIST OF P.W.B. UNIT Note: The symbols in the column "Remarks" indicate the following destinations. E3 : U.S.A. & Canada model E3 : U.S.A. & Canada model (AVR-685) E2 : Europe model E1C : China model EUT : Taiwan R.O.C. model MAIN P.W.B.
  • Page 36 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty RESISTORS GROUP R104C 00D 963 9006 285 R,FIXED RSD-R1-1WJ-5.6K R104FL 00D 963 9006 285 R,FIXED RSD-R1-1WJ-5.6K R104FR 00D 963 9006 285 R,FIXED RSD-R1-1WJ-5.6K R104SL 00D 963 9006 285 R,FIXED RSD-R1-1WJ-5.6K R104SR 00D 963 9006 285 R,FIXED RSD-R1-1WJ-5.6K...
  • Page 37 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty R179 00D 963 9003 055 R,METAL FILM 47K-F,1/4W R181 00D 963 0047 900 R,METAL FILM 4.7-J,1W For E2,E1C,EUT R184 00D 963 9006 256 R,FIXED RSD-R1-1WJ-10 R185 00D 963 9005 655 R,METAL FILM 22-J,1/4W...
  • Page 38 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C161 00D 963 9006 308 CAP.E. 10UF/50V C171 00D 963 9005 312 C,ELECT 100UF-M/10V C171A 00D 963 0020 202 C,CERAMIC 0.1UF-Z/50V C171B 00D 963 0020 202 C,CERAMIC 0.1UF-Z/50V C171C 00D 963 0020 202 C,CERAMIC 0.1UF-Z/50V...
  • Page 39 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty CP992 00D 963 0115 201 CN,ASSY 200MM/3P F101 00D 963 0104 704 FUSE T2.5A /250V For E2 F102 00D 960 0188 705 FUSE 125V-S8A For E3,EUT AVR685 F102 00D 963 0104 801 FUSE T3.15A /250V...
  • Page 40 AVR-1705/685 CPU P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Q'ty SEMICONDUCTORS GROUP IC201 00D 963 0147 004 CXP740096-187Q IC202 00D 963 0057 602 TDA7330BD for E2,E1C,EUT IC271 00D 963 0114 707 MC7812CT for E2,E1C,EUT IC272 00D 963 0114 600...
  • Page 41 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C203 00D 963 9004 698 C,CERAMIC 0.01UF-K/50V C204 00D 963 9005 914 C,ELECT 4.7UF-M/50V C205 00D 963 9004 711 C,CERAMIC 0.1UF-Z/50V C206 00D 963 9005 862 C,ELECT 47UF-M/16V for E2 C207 00D 963 9004 546 C,CERAMIC 0.01UF-M/16V...
  • Page 42 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty CP402 00D 963 0088 008 CN.WAFER 10P CP552 00D 963 0087 504 CN.WAFER 19P for E3, AVR-685 CP552 00D 963 0097 507 CN.WAFER 15P for E2,E1C,EUT CP553 00D 963 0088 008 CN.WAFER 10P...
  • Page 43 AVR-1705/685 INPUT-VOL P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Q'ty SEMICONDUCTORS GROUP IC701 00D 963 0096 401 BD3811K1 IC702 00D 963 0114 503 BD3812F IC721 00D 963 0024 004 NJM2068M IC761-763 00D 963 0024 004 NJM2068M IC781-784...
  • Page 44 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C711R 00D 963 9004 698 C,CERAMIC 0.01UF-K/50V C713L 00D 963 9006 308 CAP.E. 10UF/50V C713R 00D 963 9006 308 CAP.E. 10UF/50V C714L 00D 963 9003 152 C,FILM 0.068UF-J/100V C714R 00D 963 9003 152 C,FILM 0.068UF-J/100V...
  • Page 45 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C783SR 00D 963 9004 630 C,CERAMIC 39PF-J/50V C783SW 00D 963 9004 575 C,CERAMIC 100PF-J/50V C786SW 00D 963 9006 476 CAP.E. 4.7UF/50V C791,792 00D 963 9006 447 CAP.E. 47UF/25V OTHER PARTS GROUP...
  • Page 46 AVR-1705/685 CNT P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Q'ty SEMICONDUCTORS GROUP IC401 00D 960 0100 301 KIA7812API IC601 00D 963 0148 401 LA7956 IC621,622 00D 963 0148 401 LA7956 Q101SB 00D 963 0044 204 2SD2390-Y Q102SB...
  • Page 47 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty CAPACITORS GROUP C101SB 00D 963 9006 450 CAP.E. 47UF/50V C102SB 00D 963 9006 308 CAP.E. 10UF/50V C103SB 00D 963 9003 084 C,CERAMIC 100PF-K/500V C104SB 00D 963 9003 084 C,CERAMIC 100PF-K/500V C105SB 00D 960 9003 108 C,CERAMIC 0.022UF-Z/25V...
  • Page 48 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty CN554A 00D 963 0115 104 CN,WIRE 80MM/12P CN554B 00D 963 0099 408 CN,WIRE 80MM/4P CN555 00D 963 0110 701 CN.WAFER 14P CN556 00D 963 0086 709 CN.WAFER 11P CN590 00D 963 0049 102 CN.WAFER 3P...
  • Page 49 AVR-1705/685 PRE-AMP P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Q'ty SEMICONDUCTORS GROUP Q501C 00D 960 0196 603 KTC2874B Q501FL 00D 960 0196 603 KTC2874B Q501FR 00D 960 0196 603 KTC2874B Q501SL 00D 960 0196 603 KTC2874B Q501SR...
  • Page 50 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C502SL 00D 963 9006 308 CAP.E. 10UF/50V C502SR 00D 963 9006 308 CAP.E. 10UF/50V C503C 00D 963 9003 165 C,CERAMIC 220PF 500V C503FL 00D 963 9003 165 C,CERAMIC 220PF 500V C503FR...
  • Page 51 AVR-1705/685 DSP P.W.B. UNIT ASS'Y Ref. No. Part No. Part Name Remarks Q'ty SEMICONDUCTORS GROUP IC802,803 00D 963 0113 106 OPTICAL GP1FA513RZ IC804 00D 963 0147 402 ADSP-21266 IC805 00D 963 0146 908 LH28F800BJE IC807 00D 963 0096 100 LC89057W...
  • Page 52 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C815 00D 963 9005 312 C,ELECT 100UF-M/10V C816 00D 963 9004 708 C,CERAMIC 0.1UF-K/50V C817 00D 963 9005 778 C,ELECT 10UF-M/50V C818 00D 963 9005 749 C,ELECT 1UF-M/50V C819 00D 963 9005 901...
  • Page 53 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C875SR 00D 963 9005 778 C,ELECT 10UF-M/50V C875SW 00D 963 9005 778 C,ELECT 10UF-M/50V C876 00D 963 9004 708 C,CERAMIC 0.1UF-K/50V C876C 00D 960 9008 611 C,FILM 0.0033UF-J/100V C876FL 00D 960 9008 611 C,FILM 0.0033UF-J/100V...
  • Page 54 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty L801 00D 963 0050 900 COIL,INDUCTOR 4.7UH L803 00D 963 0050 900 COIL,INDUCTOR 4.7UH L805 00D 963 0050 900 COIL,INDUCTOR 2.2UH XTAL1 00D 963 0095 101 CRYSTAL 12.288MHZ XTAL2 00D 960 0181 003...
  • Page 55 AVR-1705/685 VIDEO P.W.B. UNIT ASS'Y (for AVR-1705/685 U.S.A. & Canada model only) Ref. No. Part No. Part Name Remarks Q'ty SEMICONDUCTORS GROUP IC600-604 00D 963 0147 907 TK15420MTL IC605 00D 963 0148 207 LA7108M IC606 00D 963 0148 003 TA1270BF...
  • Page 56 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty D612 00D 960 0197 000 KDS160 D612C 00D 963 9006 599 R,CHIP 0-J,1/10W D613 00D 960 0197 000 KDS160 D613C 00D 963 9006 599 R,CHIP 0-J,1/10W D614 00D 960 0197 000...
  • Page 57 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C640 00D 963 9004 711 C,CERAMIC 0.1UF-Z/50V C641,642 00D 963 9005 862 C,ELECT 47UF-M/16V C643 00D 963 9004 711 C,CERAMIC 0.1UF-Z/50V C645 00D 963 9005 901 C,ELECT 470UF-M/10V C646 00D 963 0144 706 C,FILM 0.01UF-J/50V...
  • Page 58 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty C712 00D 963 9005 862 C,ELECT 47UF-M/16V C713 00D 963 0144 609 C,CERAMIC 12PF-J/50V C714 00D 963 9004 591 C,CERAMIC 22PF-J/50V C715 00D 963 9004 753 C,CERAMIC 0.047UF-Z/50V C716 00D 963 9005 862...

  • Page 59: Exploded View

    AVR-1705/685 EXPLODED VIEW WARNING: Parts List Parts marked with this symbol have critical characteristics. Use ONLY replacement parts recommended by the manufacturer. Note: The symbols indicate the following destinations. E3 : U.S.A. & Canada model E3 : U.S.A. & Canada model (AVR-685)
  • Page 60 00D 963 0143 105 DSP P.W.B. Ass'y for EUT DSP P.W.B. 00D 963 0142 407 VIDEO P.W.B. Ass'y for AVR-1705/685E3 model only C-S VIDEO 2 P.W.B. for AVR-1705/685E3 model only COMP-V2 P.W.B. for AVR-1705/685E3 model only V-CNT UP2 P.W.B. for AVR-1705/685E3 model only V-CNT DOWN2 P.W.B.
  • Page 61 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty 00D 963 0136 808 PANEL FRONT for E3 00D 963 0137 001 PANEL FRONT for E2 00D 963 0137 108 PANEL FRONT for E1C,EUT 00D 963 0136 905 PANEL FRONT for AVR-685...
  • Page 62 AVR-1705/685 Ref. No. Part No. Part Name Remarks Q'ty 00D 963 0141 602 POWER TRANS for E3, AVR-685 00D 963 0109 615 POWER TRANS for E2 00D 963 0109 628 POWER TRANS for E1C 00D 963 0109 602 POWER TRANS...
  • Page 63 AVR-1705/685 PACKING VIEW PARTS LIST OF PACKING & ACCESSORIES Note: The symbols in the column "Remarks" indicate the following destinations. E3 : U.S.A. & Canada model E3 : U.S.A. & Canada model (AVR-685) E2 : Europe model E1C : China model EUT : Taiwan R.O.C.
  • Page 64 AVR-1705/685 WIRING DIAGRAM...
  • Page 65 AVR-1705/685 NOTE FOR SCHEMATIC DIAGRAM WARNING: Parts marked with this symbol ! have critical characteristics. Use ONLY replacement parts recommended by the manufactur- CAUTION: Before returning the unit to the customer, make sure you make µ either (1) a leakage current check or (2) a line to chassis resis- tance check.
  • Page 66 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (1/10) SIGNAL LINE SCHEMATIC DIAGRAMS (1/10) INPUT/VOLUME UNIT...
  • Page 67 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (2/10) SCHEMATIC DIAGRAMS (2/10) SIGNAL LINE DSP UNIT (1/2)
  • Page 68 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (3/10) SIGNAL LINE SCHEMATIC DIAGRAMS (3/10) DSP UNIT (2/2)
  • Page 69 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (4/10) SCHEMATIC DIAGRAMS (4/10) SIGNAL LINE CPU UNIT...
  • Page 70 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (5/10) SIGNAL LINE SCHEMATIC DIAGRAMS (5/10) PRE-AMP UNIT CNT UNIT 1-CH AMP UNIT...
  • Page 71 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (6/10) SIGNAL LINE SCHEMATIC DIAGRAMS (6/10) MAIN UNIT...
  • Page 72 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (7/10) AVR-1705/685 E3 model only SCHEMATIC DIAGRAMS (7/10) C-S VIDEO 2 UNIT...
  • Page 73 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (8/10) AVR-1705/685 E3 model only SCHEMATIC DIAGRAMS (8/10) COMP-V2 UNIT V-CNT UP 2 UNIT V CNT DOWN 2 UNIT...
  • Page 74 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (9/10) AVR-1705E2, E1C, EUT, AVR-1505/484E3 model only SCHEMATIC DIAGRAMS (9/10) C-S VIDEO 1 UNIT COMP-V1 UNIT 6-CH EXT UNIT V-CNT UP 1 UNIT V-CNT DOWN 1 UNIT...
  • Page 75 AVR-1705/685/1505/485 SCHEMATIC DIAGRAMS (10/10) SIGNAL LINE SCHEMATIC DIAGRAMS (10/10) FRONT UNIT TACT SW UNIT HADE PHONE UNIT POWER SW UNIT...

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