Denon-AVR5803-avr-sm维修电路原理图.pdf

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1、Hi-Fi Component SERVICE MANUAL MODELAVR-5803 MODELAVC-A1SR AV SURROUND RECEIVER / AMPLIFIER Charger Base Station AVR-5803 model only ?Some illustrations using in this service manual are slightly different from the actual set. 16-11, YUSHIMA 3-CHOME, BUNKYOU-KU, TOKYO 113-0034 JAPAN Telephone: 03 (38

2、37) 5321 For U.S.A., Canada, Europe, Asia, China 128fs, 256fs, 384fs, 512fs or 768fs. * 19RSTIReset, power down input, active LOW. * 20OVFROOverflow signal of R-channel in PCM mode. This is available in PCM mode only. 21OVFLOOverflow signal of L-channel in PCM mode. This is available in PCM mode onl

3、y. 22VCCAnalog power supply. 23AGNDAnalog ground. 24VINRIR-channel analog input, negative pin. 25VINR+IR-channel analog input, positive pin. 26VCOMRR-channel analog common mode output. 27AGNDRAnalog ground for VREFR. 28VREFRR-channel voltage reference output, requires capacitors for decoupling to AG

4、ND. I/O * Schmitt trigger input with internal pull-down (51kW typically), 5V tolerant. * Schmitt trigger input, 5V tolerant. * Schmitt trigger input. 35 AVR-5803/AVC-A1SR PCM1738 (IC103, 203, 303, 403) 1 2 3 4 5 6 7 8 9 10 11 12 13 14 28 27 26 25 24 23 22 21 20 19 18 17 16 15 RST ZEROL ZEROR LRCK DA

5、TA BCK SCKI DGND VDD SCKO MDO MDI MC CS VCC3 AGND2 LOUTL ? LOUTL+ VCC2 VCC1 VCOM3 IREF VCOM2 VCOM1 AGND1 LOUTR+ LOUTR ? MUTE TOP VIEW LRCK LOUTL+ Input I/F DGND VDD Power Supply DATA BCK Function Control I/F RST MUTE CS MC MDO MDI VCC1 VCC2 VCC3 AGND1 AGND2 System Clock Manager SCK0 ZEROL ZEROR ZERO

6、 Drtect System Clock Digital Filter 1IN/LOW; 2IN) 31 R-Y1 INPUT 30 B-Y1 INPUT 29 Y1 INPUT 28 I2C GND 27 R-Y2 INPUT 26 B-Y2 INPUT 25 Y2 INPUT 24 23 22 21 20 19 18 17 16 15 SW GND ADRS SW R-Y/R OUTPUT B-Y/B OUTPUT Y/G OUTPUT SW Vcc (9V) SYNC Vcc (9V) CP/HP INPUT Dig GND SCP OUTPUT DAC2 DAC1 fsc Y DL Y

7、 DL SW SW PEDESTAL CLAMP 1H DL CONTROL SECAM CONTROL CbCr / UV SW fsc TRAP OFFSET SW LPF / fsc TRAP BPFH. AFCH C / D 32fH VCO V C / D ACC TOF SCP SW APC P / N ID SYSTEM CW MATRIX TINT DEMO CHROMA BLK NOSE DET YUV RGB MATRIX CP / HP IN SW V SEP SYNC SEP SUB-COLOR VCXO SUB- CONTRAST Y OFFSET SW DAC TE

8、ST Ys I2C BUS CONTROL PEDESTAL CLAMP PEDESTAL CLAMP HI; 2ch/LOW; 24h TA1270BF (IC616) 37 AVR-5803/AVC-A1SR LC72131M (IC307/AVR-5803 only) 120 219 318 417 5 16 615 714 813 912 1011 XIN CE DI CL DO BO1 BO2 BO3 BO4 IO1 AOUT AIN PD VDD FMIN AMIN IO2 IFIN V ss XOUT LA1265 (S) (IC303/AVR-5803 only) 22 1 1

9、1 123 4 567 8 9 10 11 12 1314 15 16 17 18 19 202122 FM IF Level Det. Level Det. RF AmpMix.AM IF Det. LED Driver Osc.Buffer Reg.AGCS meterSD Adj GND Q Det S Curve Vcc ? ? ? ? Amp LA3401 (IC302/AVR-5803 only) 1 V OL REG OSC SYMMETRICAL REOCTANCE CIRCUIT PH ASE COMPARATOR V CO STOP PIL OT DET FFFF FF 3

10、8k H z FF 38k H z 9 0 FF 19 k H z 9 0 MUTING FM AM CH ANGE Ro Rc Rc Rb DECODER MUTING CONTROL FM AM CH ANGE OV ER V cc ON MUTING MUTING OUTPUT STEREO SW ITCH TRIGGER L AMP DRIV ER Rb 2345678 91011 2221 201918171615141312 ? PD4721GS-GJG (IC501) 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 5.5 k

11、 ? 5.5 k ? 300 ? 300 ? C4+ GND C4 ? Vss STBY VDD C1+ Vcc C1 ? C5+ C5 ? DIN1 DIN2 ROUT1 ROUT2 VCHA DOUT1 DOUT2 RIN1 RIN2 17 16 15 TA8772AN (IC615) 302928272625242322212019181716 123456789101112131415 2 1 1 or Pulse Elimination Pulse Elimination 2 1 1 or Pulse Insertion Pulse Insertion AGC Detector AG

12、C Detector Detector ClampClamp Clamp Clamp AGCAGC LPFLPF Pulse HG. GP 225fH VCO 1/225 Clock Average Bias CCD 1HCCD 1H Bipolar Circuit CCD Circuit S / HS / H REFREF + + 38 AVR-5803/AVC-A1SR MC74HC4053N (IC301) 1 2 VEE 3 4 5 6 7 89 10 11 16 15 14 13 12 Y1 Y0 Z1 Z Z0 Enable GND Vcc Y X1 X X0 C A B X =

13、Dont Care Truth Table Control Inputs Select Enable C B A ONSwitches L L L L Z0 Y0 X0 L L L H Z0 Y0 X1 L L H L Z0 Y1 X0 L L H H Z0 Y1 X1 L H L L Z1 Y0 X0 L H L H Z1 Y0 X1 L H H L Z1 Y1 X0 L H H H Z1 Y1 X1 H X X X None A OUTPUT A INPUT A +INPUT V B OUTPUT V B INPUT B +INPUT 1 2 3 45 7 8 6 1 2 BA15218F

14、 (IC206,207,606608,620,622,820) BA4510F (IC803805,853855,903905,953955) BA4560F (IC525) LM833MX (IC102112,802805) NJM2068MD (IC101,103,108,109,111114,201209, 308, 309,408,409,601604,801,851,901, 942,951,952,962,972) NJM4556AD (IC801) NJM5532MD (IC106,107,206,207,301,302,305307,309, 310,313,314,317,3

15、18,321,322,325,326,329, 330,406,407) OP275GSR (IC104,105,204,205,304,305,307,315,323, 331,404,405) TK15420MTL (IC301303,306,307, 310,313, 501505, 510,511,516,526, 608,609, 611,612, 701,702,705,706) SN74HC151APW (IC516519) SN74LV00APW (IC111,707) SN74LV02APW (IC802,902) Data Inputs Outputs GND Strobe

16、 3 2 1 0 Y W 1 2 3 4 5 6 7 8 D2 D1 D0 Y W S D5 D6 D7 A D4 B C 16 15 14 13 12 11 10 9 Vcc 5 6 7 A B C 4 Data Inputs Data Select 1A 1B 1Y 2A 2B 2Y 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Vcc 4B 4A 4Y 3B 3A 3Y GND 1Y 1A 1B 2Y 2A 2B GND 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Vcc 4Y 4B 4A 3Y 3B 3A SN74HC153APW (IC520

17、) 14 13 12 11 10 9 15 16 Strobe 1G Select B Data Inputs Output 1Y GND 1C3 1C2 1C1 1C0 1 2 3 4 5 6 7 8 1G 1C3 1C2 1C1 1C0 1Y B B A A B B A A 2G 2C3 2C2 2C1 2C0 2Y Vcc 2G Strobe Select A 2C3 2C2 2C1 2C0 Data Inputs 2Y Output TC74VHCU04FT (IC511514) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1A 1Y 2A 2Y 3A 3Y GN

18、D Vcc 6A 6Y 5A 5Y 4A 4Y SN74LV125APW (IC702705) IC 1A 1Y 2C 2A 2Y GND 1 2 3 4 5 6 7 14 13 12 11 10 9 8 Vcc 4C 4A 4Y 3C 3A 3Y SN74LV08APW (IC110,710,911) SN74AHCT08PW (IC706,711) 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1A 1B 1Y 2A 2B 2Y GND Vcc 4B 4Y 4A 3B 3A 3Y BU4051BCF (IC304,305,309,506509) Channel IN/O

19、UT X4 X6 X X7 X5 INHIBIT VEE Vss VDD X2 X1 X0 X3 A B C Common Channel IN/OUT OUT/IN 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 4 C 6 OUT/IN 7 5 INH VEE 2 1 0 3 A B NJM7905FA (IC104,307) NJM7915FA (IC313) Output Input GND BA033FP (IC715,716,958) BA033T (IC304) KIA78R09PI (IC509) KIA78R12PI (IC723) NJM781

20、2FA(S) (IC103,107, 302,306,502) NJM7815FA(S) (IC312) NJM7820FA(S) (IC501) Output GND Input BU4053BCF (IC307, 308, 309, 512, 513) Y1 Y0 Z1 Z Z0 INH VEE Vss VDD Y X X1 X0 A B C 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 C Y X X1 X0 A B Y0 Z1 Z Z0 INH VEE Y1 BU4052BCF (IC308, 311, 314, 514, 515, 606, 607,

21、613) Y0 Y2 COMMON Y Y3 Y1 INH VEE Vss VDD X2 X1 COMMON X X0 X3 A B 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 B X2 X1 XOUT /IN X0 X3 A Y2 YOUT /IN Y3 Y1 INH VEE Y0 TC74HC32AF (IC624) SN74AHCT32PW (IC909,910) SN65LVDS32PW (IC523) 1. VIN 2. VO 3. GND 4. VADJ PQ30RV11 (IC201) 1 2 3 4 FRONT VIEW PQ018EF01SZ

22、 (IC717,718) FRONT VIEW 1 2 3 4 1. VIN 2. VO 3. GND 4. VC 1 2 3 4 5 6 7 14 13 12 11 10 9 8 1A 1B 1Y 2A 2B 2Y GND Vcc 4B 4Y 4A 3B 3A 3Y 39 AVR-5803/AVC-A1SR CXA1511M (FR: IC502) 87564 32 1 ABLC + Head Amp Limiter Amp BPF BEF Detector & ComparatorIntegrator Hysteresis Comparator C1C2 GND fo NCOUT Vcc

23、IN 1 4 8 ABLC ICP-N15 (IC101,102,105,106,202) 1. Vcc 2. GND 3. Vout 1. Vin 2. Vcc 3. GND 123 123 TORX141 (IC501506) TOTX141 (IC507,508) GP1U271X (Remote Control Sensor) (IC401) GNDVccVout GND VOUT Vcc Head Amp Limiter Amp BPF Detector & Comparator Integrator Hysteresis Comparator 2SA988 (E/F) 2SA102

24、0 (Y) 2SC1740S 2SC1841 (E/F) 2SC2240 (BL) 2SC2655 (Y) KTC2874B B (Base) C (Collector) E (Emitter) 2SC4495 2SB1186A 2SA1546 (L) 2SC4001 (M/L) MN1715 MP1715 2SA1493 DTC114ES DTC144ES B (Base) C (Collector) E (Emitter) 2SK184C (GR)/(BL)2SA1907 (O/P/Y) 2SC5099 (O/P/Y) E (Emitter) C (Collector) B (Base)

25、S (Source) G (Gate) D (Drain) E (Emitter) C (Collector) B (Base) B (Base) C (Collector) E (Emitter) E (Emitter) C (Collector) B (Base) R1 R2 B C E NPN Type 10kohm R1R2 DTA114ES DTA144ES 10kohm 47kohm47kohm 4 1 2 3 1. OE or ST 2. GND 3. OUT 4: VDD FCX0-03 (IC677,808)NJM2274R (IC315) 1 2 3 45 7 8 6 TO

26、P VIEW IC PROTECTOR OPTICAL ? OTHERS TRANSISTORS ? ? ? 2SB1412TL FRONT VIEW E (Emitter) C (Collector) E C E 1Yin Cin 7 C Mute CTL 2 GND Disc. Vref 7 Power Save CTL 2 Vcc Clamp 8Bias + + Vsag4 3 Vout 750? 40 AVR-5803/AVC-A1SR DTA114EK DTA114TK (AVR-5803 only) DTC114EK DTC114YK DTC143EK DTC144EK DTC32

27、3TK (AVR-5803 only) KRC102S RN2402 (AVR-5803 only) 2SA933S (S) 2SC1740S (S)/(E) B (Base) C (Collector) E (Emitter) 2SA1037K (S/R) 2SA1163 2SA1182 (Y/O) 2SB709A 2SC2412K 2SD601A 2SC2996 (Y)(AVR-5803 only) 2SC2875B DTA114EK DTA114TK RN2402 DTC114EK DTC143EK DTC144EK DTC323TK DTC114YK KRC102S 1: (Emitt

28、er) 2: (Collector) 3: (Base) 1 2 3 1 2 3 1: GND/(Emitter) 2: Output/(Collector) 3: Input/(Base) 1: S(Source) 2: D(Drain) 3: G(Gate) 1 2 3 2SK771 PNP Type 10kohm R1R2 R1 B C E R2 DTA114EK DTA114TK 10kohm RN2402 10kohm 10kohm10kohm NPN Type R1 B C E R2 10kohm R1R2 DTC114EK DTC144EK 10kohm 47kohm47kohm

29、 DTC143EK4.7kohm4.7kohm DTC323TK2.2kohm 10kohmKRC102S10kohm DTC114YK10kohm47kohm DIODES (LED Included) 1SS270A Navy Blue HZS4A-1 HZS4B-2 HZS33-2 MTZJ4.7A MTZJ6.2A MTZJ9.1A MTZJ18A 1SR35-400A KV1851-TL 123 2 3 1 3 1 2 2 3 1 1: Anode 2: Anode 3: Cathode KDS226 DAN202K KDS184 SEL1210S (Red) SEL1410E (G

30、reen) SEL-4214S SEL-2E10C FMG-22RFMG-22S FCH20A15 A (Anode) K (Cathode) A (Anode) ? Green Orange K (Cathode) A (Anode) K (Cathode) 1: Cathode 2: Cathode 3: Anode 1 2 3 1 2 3 Lake Blue (HZS series) Black (MTZJ series) Short (Cathode) Long (Anode) 2 1 2 1 UDZ3.0B UDZ6.8B UDZS9.1B UDZS15B 2 1 2 1 ISR15

31、4-400 RB521S-30 RB501V-40 2 3 1 DAP202K KDS181 1: Cathode 2: Cathode 3: Anode 1 2 3 41 AVR-5803/AVC-A1SR S38 S14 S9S1 S2 S3 S4 S5 S12 S13 S7S15 S6 S10 S11 G1 F2F1 158 G2G16 Pin Assignment PIN NO. CONNECTION 12345678910111213141516171819 232425262728293031323334 F1F1S1S2S3S4S5S6S7S8S9S10 S11 S12 S13

32、S14 S15 S16 S17 PIN NO. CONNECTION 20 2122353637383940 4142434445464748495051525354555657 S18 S19 S20 S21 S22 S23 S24 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S36S37 S38 G16 G15 G14 G13 G12 G11 G10G9G8G7G6G5G4G3G2G1F2F2 PIN NO. CONNECTION 58 F1,F2 : Filament G1G16 : Grid S1S38 : Anode S13 S14 S15

33、 S16 S17 S18 S19 S20 S21 S22 S23 S24 G1G2G3G4G5G6G7G8G9G10G11G12G13G14G15G16 S38 S36 S37 S38 ? 2 DBS TV ? 1 VDP TAPE /(DVD) /(MD) AUXDVD MDV.AUX TUNER ? 2 ? 3 CD ? 1 PHONO VCR REC MULTI STEREO AUTO TUNED RDS CH S1 S2 S3 S4 S5 S6 S7 S8 S9 S10 S11 S12 S1 S2 S3 S4 S5 S6 S7 S9 S10 S11 S12 S1 S2 S3 S4 S5

34、 S6 S7 S8 S9 S10 S11 S12 S13 S14 S15 S16 S17 S18 S19 S20 S21 S22 S23 S24 S13 S14 S15 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 S25 S26 S27 S28 S29 S30 S31 S32 S33 S34 S35 G2G16G1G2G16G1G2G16G1G2G16G1 DIGITAL PRO LOGIC ? FL DISPLAY CM1690C (FL101) S1 S6 S11 S16 S21 S26 S31 S2 S7 S12 S17 S22 S27 S32

35、 S3 S8 S13 S18 S23 S28 S33 S4 S9 S14 S19 S24 S29 S34 S5 S10 S15 S20 S25 S30 S35 Anode & Grid Assignment STEREO AUTO TUNED RDS REC MULTI PHONO VCR CD ? 1 TUNER ? 2 ? 3 AUX V.AUX DVD MD VDP TAPE TV ? 1 DBS ? 2 PRO LOGIC DIGITAL CH DIGITAL ANALOG G15 STEREO AUTO G16 TUNED RDS REC MULTI G12 PHONO VCR G1

36、0 CD ? 1 G9 TUNER ? 2 ? 3 G7 AUX V.AUX G6 DVD MD G4 VDP TAPE G3 TV ? 1 DBS ? 2 G13G5G2G1 PRO LOGIC DIGITAL DIGITAL ANALOG CH G14G11G8 12 13 12 112 1 13 14 7 129 228 1 10 17 COMPONENT SIDE 87654321 A B C D E 42 1U-3292 FRONT P .W.B. UNIT AVR-5803/AVC-A1SR PRINTED WIRING BOARDS C B E C B E C B E C B E

37、 C B E C B E C B E C B E C B E C B E 1 16 17 3233 36 37 48 121 2242 FOIL SIDE 87654321 A B C D E 43 1U-3292 FRONT P .W.B. UNIT AVR-5803/AVC-A1SR 1 91 71 7 1 3 1 3 1 71 8 1 3 1 3 1 71 8 1 11 1 3 1 3 1 3 1 3 1 7 7 1 1 7 7 1 1 7 7 1 1 7 7 1 1 7 7 1 1 7 7 1 1 3 1 3 1 7 7 1 1 7 7 1 1 3 1 3 1 31 3 1 31 3

38、11 18 17 18 17 17 17 18 1 COMPONENT SIDE 87654321 A B C D E 44 1U-3296 POWER AMP P .W.B. UNIT AVR-5803/AVC-A1SR 1 11 1222 1 3 111 111 1222 C B E 110 1120 C B E C B E C BE C B E C B E C BE C B E C B E C B E COMPONENT SIDEFOIL SIDE 87654321 A B C D E 45 1U-3298 TUNER P .W.B. UNIT (for AVR-5803)? AVR-5

39、803/AVC-A1SR 1313 16 16 1 14 8 18 18 18 18 110 110 17 16 13 16 13 16 16 16161616 1418181 1 13 16 17 12 12 5 8110 1 14 14 13 19 14 16 1615 1617 13 12 1 3 13 COMPONENT SIDE 87654321 A B C D E 46 1U-3404 PRE REG. P .W.B. UNIT AVR-5803/AVC-A1SR C BE C BE C B E C B E C B E C B E C B E C B E C B E C B E C

40、 B E C B E C B EC B E C B E C B E C B E C B E C BE C BE C BE C BE C BE C BE C B E C B E C B E C B E C B E C B E C B E C B E C B E C BE C B E C B E C B E C B E C B E C B E C BE C BE C B E C B E 1111 14 15 1817 11311 114 1 10 1 6 1 228 29 1 114 228 29 14 110171611211011813 112 14 58 14 58 14 58 17 814

41、 17 814 17 814 18 916 18 916 18 916 17 814 17 814 17 814 17 814 17 814 17 814 17 814 17 814 17 814 17 814 17 814 916 1 1 4 4 5 5 8 8 8 1 4 58 1 1528 1 14 1 8 1 8 916 916 1 8 916 1 8 9 16 1 8 916 1 8 916 1 8 916 110 1120 14 58 17 814 17 814 17 814 17 814 1 1 1 12 1324 25 36 3748 1 12 1324 25 36 3748

42、1 12 1324 25 36 3748 1 12 1324 25 36 3748 125 26 50 5175 76 100 3150 51 80 81100 1 30 36 37 10 1120 18 918 1 10 11 20 14 58 14 58 14 58 1 45 8 1 45 8 1 45 8 1 45 8 1 45 8 1 45 8 1 45 8 1 45 81 45 81 45 81 45 81 45 81 45 8 1 4 5 81 4 5 81 4 5 81 4 5 8 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 1

43、4 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 1 1415 28 1 1415 28 1 1415 28 1 1415 28 1 1415 281 1415 28 1 1415 28 1 1415 28 14 14 72 73108 144 COMPONENT SIDE 87654321 A B C D E 47 1U-3425 DIGITAL P .W.B. UNIT AVR-5803/AVC-A1SR C B E C B E C B E C B E C B E C B E C B E C B E C B E C BE

44、C BE C BE C BE C BE C BE C BE C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C BE C BE C B E C B E C B E C B E FOIL SIDE 87654321 A B C D E 48 1U-3425 DIGITAL P .W.B. UNIT AVR-5803/AVC-

45、A1SR 1 2425 481 2425 48 1 10 1120 1 1011 20 1 1011 20 44 86 1 4344 86 1 43 1 78 14 1 1011 20 1 1011 20 1 78 14 FOIL SIDE COMPONENT SIDE 87654321 A B C D E 49 1U-3426 DSP P .W.B. UNIT AVR-5803/AVC-A1SR C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C BE C BE C BE C BE C

46、 BE C BE C BE C BE C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E 115 112 114 14 1 112110113 14 112 112 1313 1 14 14 1917 1 14 58 8 916 1 24 12 13 1 28 14 15 1 24 12 13 1 24 12 13 1 24 12 13 1 24 12 13 1 24 12 13 1 24 12 13 1 24 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8

47、4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 28 14 15 1 8 4 5 1 8 4 5 1 28 14 15 1 8 4 5 1 28 14 15 1 8 4 5 1 28 14 15 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 1 8 4 5 12 13 1 14 58 8 916

48、18 916 18 916 14 58 18 916 14 58 COMPONENT SIDE 87654321 A B C D E 50 1U-3436 EXT.IN VOL. P .W.B. UNIT AVR-5803/AVC-A1SR C B E C B E C B E C B E C B E C B E C B E C BE C BE C BE C BE C BE C BE C BE C BE C B E C B E 17 814 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 14 58 FOIL SIDE 87654321 A B C D E 51 1U-3436 EXT.IN VOL. P .W.B. UNIT AVR-5803/AVC-A1SR C BE C BE C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C B E C BE C BE C BE C BE