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Onkyo TX-DS494, Service Manual

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Onkyo TX-DS494 Service Manual Download Page 4

TX-DS494/HT-R490

EXPLODED VIEW-1

MAIN PART

27

U8

E891

28

P901

(PP,PT type)

P901

(DD type)

30

30

30

Q921

Q922

Q933

3

U15

6

38

36

Q526

Q524

E811

21

Q518

D910

18

24

15

45

20

14

47

46

T901

12

7

8

F911

F922

E811

Q1513

Q1512

39

41

37

29

P101

U23

U20

U21

U3

4

U19

U13

17

U5

U1

U2

U18

U4

3

17

U12

U6

U14

17

3

3

3

3

3

3

3

44

40

F933

26

Summary of Contents for TX-DS494

Page 1: ...VOLUME BASS TREBLE AV RECEIVER TX DS494 FM AM PHONO CD TAPE VIDEO 1 DVD A B SPEAKERS DIMMER SURROUND DTS VIDEO 2 VCR AUDIO SELECTOR LISTENING MODE DSP STEREO DISPLAY STANDBY SP SEL TUNING PRESET MEMOR...

Page 2: ...1 Vp p 75 ohms Y 0 28 Vp p 75 ohms C TUNER SECTION FM Tuning Range 87 5 108 0 MHz 50 kHz steps Usable Sensitivity Mono 11 2 dBf 1 0 V 75 ohms Stereo 17 2 dBf 2 0 V 75 ohms 50 dB Quieting Sensitivity M...

Page 3: ...t is Power ON 2 After CLEAR is displayed the preset memory and each mode stored in the memory are initialized and will return to the factory settings 2 To initialize the unit This unit does not requir...

Page 4: ...PP PT type P901 DD type 30 30 30 Q921 Q922 Q933 3 U15 6 38 36 Q526 Q524 E811 21 Q518 D910 18 24 15 45 20 14 47 46 T901 12 7 8 F911 F922 E811 Q1513 Q1512 39 41 37 29 P101 U23 U20 U21 U3 4 U19 U13 17 U...

Page 5: ...TX DS494 HT R490 EXPLODED VIEW 2 FRONT PART 43 30 U10 U11 1 30 30 3 3 3 U9 U16 U17 U7 33 4 3 3 50 32 34 3 42 48 P7001 P702 49 2 3...

Page 6: ...me B 28325642 Knob Volume S 28325643 Knob Volume G 43 28325405 Knob tone B 28325474 Knob tone S 28325407 Knob tone G 44 27191130 Holder outlet WR 45 27122810 Rear panel DD 27122811 Rear panel PP 27122...

Page 7: ...in PC board ass y PP 1A899544 1C NAAR 7044 1C Main PC board ass y PA GT 1A899544 1D NAAR 7044 1D Main PC board ass y WT WR 1A899544 1F NAAR 7044 1F Main PC board ass y 490 U9 1A899545 1A NAETC 7045 1A...

Page 8: ...European model only WT World wide model only WR Chinese model only 494 TX DS494 only 490 HT R490 only B Black model only S Silver model only G Golden model only U11 1A899547 1A NAETC 7047 1A Tone con...

Page 9: ...TX DS494 ONLY TX DS494 ONLY PHONO EQ PHONO CD DIGITAL 1 DIGITAL 2 DIGITAL 3 LOCAL REGULATOR NADG 7049 N NADIS 7043 NAAF 7057 DIGITAL INPUT MULTI CH INPUT TU Mute 0dB 0dB 0dB 0dB 3dB 3dB SURROUND MIX...

Page 10: ...LT FSWSDO FSWSCK I PRO V PRO SPARL SPBRL SPARL SPARL V PRO I PRO VOLSLT SDO SCK GAINCTL FMUTE 29V REGULATOR MW AC120V and AC220 230V MG AC220 230V MP AC230 240V MD AC120V NAAF 7050 NAAF 6790 S VIDEO S...

Page 11: ...CS DSPCS DSPRST AVSS AM9K 10K HPIN MODE ECHO K3 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 K2 K1 K0 AVDD AVREF SYSIN POFF RDSSCK REMIN VSS TUMUT AMUT ABOOT INT KARRST CFGGAIN VDD GAIN...

Page 12: ...F002T 16 Vdd I Power supply terminal 5V 53 SD I Broadcast detection input terminal 17 VOL SLT O Latch output terminal to Master volume IC TC9482N 54 STEREO I Stereo broadcast detection input terminal...

Page 13: ...C3587 101J C3586 101J C3271 10 50 C316 47 16 C315 47 16 C3681 10 50 C3371 10 50 C3571 10 50 C3294 10 16 C3283 47 16 C3194 47 16 C3183 47 16 C3173 47 16 C3172 47 16 C3171 10 50 C3381 10 50 C3581 10 50...

Page 14: ...3 9K R3587 6 8K R3588 3 3K R3289 R3189 R3190 3 3K R3693 1K R3688 1K R3191 33K R3291 33K R3288 3 3K R3290 3 3K R3188 3 3K R3292 56K R3295 100K R3296 1 2K R3192 56K R3195 100K R3196 1 2K R394 1K R393 1...

Page 15: ...0VF AUTO 15 AVDD 9 AVSS 10 BICK 21 CLKM CDTI 27 DAUX 8 DIF0 RX2 12 DIF1 RX3 13 DIF2 RX4 14 DVDD 1 DVSS 2 ERF 18 FS96 17 LRCK 19 MCKO1 24 MCKO2 23 MCKS CDTO 28 OCKS1 CCLK 26 R 7 RX1 11 SDTO 20 TVDD 3 V...

Page 16: ...64 681J C851 681J C850 681J C837 681J C863 681J C862 681J C849 681J C848 681J C835 681J C839 470J C861 152J C860 152J C847 152J C846 152J C833 152J C853 470J C866 470J C867 470J C865 681J C740 100 6 3...

Page 17: ...00K R224 100K R278 100K R277 100K R263 1M R264 1M R262 330 R261 330 R272 820 R266 1K R268 56K R270 220K R274 470K R265 1K R267 56K R269 220K R271 820 R276 39K R275 39K R273 470K R341 330 R347 56K R342...

Page 18: ...SWSDO FSWSLT FSWCLK VSS GND Q3151 TC9164 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 DSP 26 FS96 27 VDD 28 D937 RL1N4003 D938 RL1N4003 D932 D936 D935 RL1N4003 4 D934 D933 D941 RL...

Page 19: ...J C623 104J C626 103J C1526103J C1511 104J C1510 473J C622 473J C621 473J C1506 070D C1529 101J C1509 020C C1508 221J C1502 101K C630 101J C610 070D C612 221J C618 020C C604 101K C629 101J C609 070D C...

Page 20: ...R555 8 2 1W R571 33K R580 100 R540 2 2 1 2W R542 2 2 1 2W R546 22K R552 33K R550 6 8K R538 3 9K R564 100K R526 68 1 2W R524 82 1 2W R522 82 1 2W R528 82 1 2W 1 2W R532 18K R536 18K R534 2 2K R566 68K...

Page 21: ...008 D7002 D7001 SEL4110R X7001 5MHZ D7009 9 1B Q7003 RN2403 L7002 22UH R7079 10K R7078 1K R7076 1K R7094 470 R7001 470 R421 75 R432 75 R431 75 R422 75 R404 10K R406 10K R411 75 R412 75 R442 1K R441 1K...

Page 22: ...061 1K R7157 0 R7154 0 R7153 0 R7053 10K R7059 1K R7019 R7018 R7055 10K R7054 220 R7052 220 R7074 1K R7072 1K 3 1K 5 1K R7070 1K R7071 10K R7077 10K R7042 220 R7030 2 7K R7051 10K R7049 10K R7047 10K...

Page 23: ...1501 Q1503 Q1514 2210755 or 2SC1775A E or Q581 Q582 2210755 or 2SC1775A E or 2210756 or 2SC1775A F or 2210756 or 2SC1775A F or 2211732 or 2SC1845 F or 2211732 or 2SC1845 F or 2211733 or 2SC1845 E or 2...

Page 24: ...l oxide R623 R626 443528204 82ohm 5 1 2W Metal oxide R629 R630 R1517 443525604 56ohm 5 1 2W Metal oxide R633 R634 R1515 443526804 68ohm 5 1 2W Metal oxide R635 R636 443528204 82ohm 5 1 2W Metal oxide...

Page 25: ...DESCRIPTION Resistors R991 R992 453530104 1ohm 5 1 2W Metal oxide R993 4500229 0 1ohm 5 1 4W Metal oxide Sockets JL911A 25051107 NSCT 3P894 JL912B 25050281 NSCT 4P109 P921 2009990570AUL NSAS 6P0779 U7...

Page 26: ...sistors R921 R924 453532294 0 22ohm 5 1 2W Metal oxide R925 453530274 2 7ohm 5 1 2W Metal oxide R932 453530224 2 2ohm 5 1 2W Metal oxide R933 453530104 1ohm 5 1 2W Metal oxide R934 443522204 22ohm 5 1...

Page 27: ...N1241 B or 2213631 RN1241 A Q3185 2214350 or RN2202 or 2213510 or DTA114ES or 2215770 KRA102M Q3282 Q3284 2213632 or RN1241 B or 2213631 RN1241 A Q3384 Q3484 2213632 or RN1241 B or 2213631 RN1241 A Q3...

Page 28: ...9P1024 P341 25045649 or NPJ 6PDBRW453 or 25045572 NPJ 6PDBRW387 P701 2009990577UL NSAS 12P0786 P7202 25045473 NPJ 1PDBL291 490 U15 PRIMARY CIRCUIT PC BOARD NAPS 7051 1A 1B 1C 1D 1F 1G 1H CIRCUIT NO P...

Page 29: ...j j j j j j P7 k k k k k k k k k k k k k k k P8 b b b b b b b b b b b b b b b P9 f f f f f f f f f f f f f f f P10 m m m m m m m m m m m m m m m P11 g g g g g g g g g g g g g g g P12 c c c c c c c c...

Page 30: ...512 P611 P612 and P1511 3 After turn POWER to ON adjust the trimming resistors R573 R574 R673 R674 and R1532 so that the reading of voltmeter becomes 2 4 to 2 6 mV 4 After adjustment attach the top co...

Page 31: ...MULTI CHANNEL INPUT terminals with no load Confirm that the speaker relay turns OFF 3 Confirmation of Current detection circuit 1 Press and hold down CD button then press SPEAKERS A and SPEAKERS B bu...

Page 32: ...362794 Label UPC DD 29362795 Label EAN B PP WT WR PA 29362796 Label EAN S PP 29362797 Label EAN G PA WR WT 29362808 Label EAN 490 20 29343037 Instruction manual E DD PP WT WR GT PA 29343046 Instructio...

Page 33: ...UROPE ELECTRONICS GmbH Industriestrasse 20 82110 Germering GERMANY Tel 089 849 320 Fax 089 849 3265 E mail info onkyo de ONKYO CHINA LIMITED Units 2102 2107 Metroplaza Tower I 223 Hing Fong Road Kwai...

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