Onkyo-TX-8255-Service-Manual(1) 电路图 维修手册.pdf

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1、TX-8255 SERVICE MANUALSERVICE MANUAL RC-666S STEREO RECEIVER MODEL TX-8255 Ref. No. 4088 072008 Black and Silver models 120V AC, 60Hz 230 - 240V AC, 50Hz B MDC B MPP, S MPP SAFETY-RELATED COMPONENT WARNING! COMPONENTS IDENTIFIED BY MARK ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR

2、 RISK OF FIRE AND ELECTRIC SHOCK. REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL. MAKE LEAKAGE-CURRENT OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOM

3、ER. RadioFans.CN 收音机爱 好者资料库 Re q u e s t I D T MA I - 7 E G FD R ONKYO Service Manual W r i t t e n By : Te r u k a z u M a t u m i Re q u e s t Da t e : 2 0 0 8 / 0 6 / 2 4 Status: Completed I s s u e rA p p r o v e rRe v i e w e rW r i t e r Te c h n i c a l s u p p o r tT o s h i y u k i O t a n

4、i 2 0 0 8 / 0 9 / 0 9 T o s h i a k i O k u y a m a 2 0 0 8 / 0 6 / 2 4 T e r u k a z u M a t u m i 2 0 0 8 / 0 5 / 0 9 Model:TX-8255 Ref No:4088 C o m p o n e n t : P r i n t e d s e r v i c e m a n u a l i s n o t p r e p a r e d . T i t l eA p p r o v e ( D a t e ) A t t a c h e d f i l e C o v e

5、 r2 0 0 8 / 0 5 / 2 9 S p e c i f i c a t i o n s / P a n e l v i e w / R e m o t e c o n t r o l l e r - - -R e f e r t o i n s t r u c t i o n m a n u a l . E x p l o d e d v i e w2 0 0 8 / 0 6 / 0 2 B l o c k d i a g r a m2 0 0 8 / 0 6 / 2 4 - - - 2 P a g e s ( L / R ) - - - A l l ( T a b l o i d

6、 s i z e ) S c h e m a t i c d i a g r a m s2 0 0 8 / 0 6 / 2 0 - - - 2 P a g e s ( L / R ) A m p l i f i e r s e c t i o n - - - A l l ( T a b l o i d s i z e ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - 2 P a g e s ( L / R ) M i c r o p r o c e s s o

7、r s e c t i o n - - - A l l ( T a b l o i d s i z e ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - D i s p l a y s e c t i o n - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - RadioFans.CN 收音机爱 好者资料库 P o w e r s u p p l y s e

8、c t i o n P a c k i n g p r o c e d u r e2 0 0 8 / 0 5 / 2 8 P r i n t e d c i r c u i t b o a r d v i e w s- - -R e f e r t o s e r v i c e m a n u a l o f T X - 8 2 2 2 ( R e f . N o . : 3 9 4 5 ) I C b l o c k d i a g r a m s a n d T e r m i n a l d e s c r i p t i o n s / F L t u b e v i e w 2 0

9、 0 8 / 0 8 / 2 1 I CI C R e f e r t o s e r v i c e m a n u a l o f T X - 8 2 2 2 ( R e f . N o . : 3 9 4 5 ) - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - F L t u b eF L t u b e M i c r o p r o c e s s o r t e r m i n a l d e s c r i p t i o n s- - -R e f e r t

10、 o s e r v i c e m a n u a l o f T X - 8 2 2 2 ( R e f . N o . : 3 9 4 5 ) S e r v i c e p r o c e d u r e2 0 0 8 / 0 8 / 0 4 O p e r a t i o n c h e c k2 0 0 8 / 0 9 / 0 2 MPP type only F901 - MDC type only P910 P901 Q701 C709 C704 BACKUP A 1 2 3 4 5 BCDEFGH TX-8255 BLOCK DIAGRAM TX-8255 SPA SPBTHE

11、RM PRO -B1 E +B1 UP DOWN STB DATA CL TUNL FLAC2 FLAC1 -VP MUT REMIN FLDRST FLDCS FLDCLK FLDSDO +B3 -B3 TMUT PLLCLK PLLSDO STEREO SD RDSCLK RDSDAT POW +5.6V +5V_MPU +5V_CPU +5V_CPU +12V -12V TU-L RI IRIN IROUT K0 K1 K2 KEYINT0 KETINT1 KEYINT2 K3 KEYINT3 LEDSTBY FLAC1 FLAC2 +5.6V Q525, 526 Q581, 582 P

12、ROTECT TO POWER AMP 120V PRIMARY THERMAL SENSOR Q855 VOLTAGE REGURATOR PHONO EQULIZER Q301 PHONO OUT IN TAPE 1 CD PLAY1 V1 LINE 1 /DVD IN V2REC V2PLAY TUNER PLAY2 REC2 OUT IN TAPE 2 LINE 2 IN AUDIO IN / OUT MOTOR DRIVE Q481 DISPLAY CONTROL MAIN MICROPROCESSOR Q601 FL DRIVER Q851 FL DISPLAY Q852 FM/A

13、M(RDS) TUNER UNIT CONTROL KEYS TO SELECTOR & PHONO EQ. Q302 PHONO CD REC1 SELECTOR 240V Q591 RELAY DRIVE Q592 RELAY DRIVE POWER AMP. RL901 PRI. RELAY F903 OUTLET AC IN P501 SPEAKERS A SPEAKERS B RL591 SP. A RELAY RL592 SP. B RELAY P503 PHONES C916 D911 Q921 Q922 D920 F901 Q912 R641 VOLUME Q491 MUTIN

14、G R393 BALANCE F902 D920 T902 SUB TRANS. C915 REMOTE SENSOR RI IR IN IR OUT STANDBY Q402 R409 BASS Q401 R415 TREBLE S901 NC THERMAL FUSE T901 Q706 D915 - 918 MAIN TRANS. +12V -12V M30622MWP U851 M66005 TC9273CNG TA7291S NJM2068 NJM2068 F902 - MPP type only F901 - MDC type only P910 P901 Q701 C709 C7

15、04 BACKUP A 1 2 3 4 5 BCDEFGH TX-8255 BLOCK DIAGRAM SPA SPBTHERM PRO -B1 E +B1 UP DOWN STB DATA CL TUNL FLAC2 FLAC1 -VP MUT REMIN FLDRST FLDCS FLDCLK FLDSDO +B3 -B3 TMUT PLLCLK PLLSDO STEREO SD RDSCLK RDSDAT POW +5.6V +5V_MPU +5V_CPU +5V_CPU +12V -12V TU-L RI IRIN IROUT K0 K1 K2 KEYINT0 KETINT1 KEYI

16、NT2 K3 KEYINT3 LEDSTBY FLAC1 FLAC2 +5.6V Q525, 526 Q581, 582 PROTECT TO POWER AMP 120V PRIMARY THERMAL SENSOR Q855 VOLTAGE REGURATOR PHONO EQULIZER Q301 PHONO OUT IN TAPE 1 CD PLAY1 V1 LINE 1 /DVD IN V2REC V2PLAY TUNER PLAY2 REC2 OUT IN TAPE 2 LINE 2 IN AUDIO IN / OUT MOTOR DRIVE Q481 DISPLAY CONTRO

17、L MAIN MICROPROCESSOR Q601 FL DRIVER Q851 FL DISPLAY Q852 FM/AM(RDS) TUNER UNIT CONTROL KEYS TO SELECTOR & PHONO EQ. Q302 PHONO CD REC1 SELECTOR 240V Q591 RELAY DRIVE Q592 RELAY DRIVE POWER AMP. RL901 PRI. RELAY F903 OUTLET AC IN P501 SPEAKERS A SPEAKERS B RL591 SP. A RELAY RL592 SP. B RELAY P503 PH

18、ONES C916 D911 Q921 Q922 D920 F901 Q912 R641 VOLUME Q491 MUTING R393 BALANCE F902 D920 T902 SUB TRANS. C915 REMOTE SENSOR RI IR IN IR OUT STANDBY Q402 R409 BASS Q401 R415 TREBLE S901 NC THERMAL FUSE T901 Q706 D915 - 918 MAIN TRANS. +12V -12V M30622MWP U851 M66005 TC9273CNG TA7291S NJM2068 NJM2068 F9

19、02 - MPP type only F901 - MDC type only P910 P901 Q701 C709 C704 BACKUP A 1 2 3 4 5 BCDEFGH TX-8255 SCHEMATIC DIAGRAMS-1 AMPLIFIER SECTION TX-8255 DATA CLK POFF2 TU_L TU_R SE1H PROTECT PROTECT STB VOL_UP SP_A SP_B SP_A SP_B DIRECT +12VA DIRECT VOL_DN AMUT MON-A MON-B +12VA 5.6V -12VA VOL_DN VOL_UP S

20、TB AMUT DATA MON-A +12VS MON-B +12VR CLK +10S FLAC2 FLAC1 FLAC1 FLAC2 -VP SE1H L2 R2 E R3 E E L3 MTR+ MTR- MTRG R L R L L VIDEO TREBLE BASS VS NC OUT1 VREF IN1 GND MOTOR DRIVE BALANCE PHONO EQUALIZER SEL STB DATACL GND T2 REC T2 PLAY VSSVDD PHONO CD T1 PLAY DVD V REC V PLAY TUNER PHONO L R R L R L C

21、D OUT TAPE 1 IN TAPE 2 R L R L R L RLGND T1 REC P918 BUS RLGND +12V -12V TU_GND TS_GND SPEAKERS R LL R AB IN2 OUT2 VCC IN LINE 1/DVD IN LINE-2 IN R V_GND RLGND MPUGND RL1N4003 1SR139-100 D915,D921: GP104003E NC NAAF-8886 MPUGND To NADG-8876 SD-2 : G3 MICROPROCESSOR PCBNC D401-D404 : 1SS133 or 1SS270

22、 Q401-Q402 : NJM2068L-D C915, 916 : 8200/56 NC ID+ ID- 2SC5197 2SA1940 +0.6V -0.6V -0.6V -55.8V -22.8V +55.8V +55.8V +56.3V +56.3V -55.7V 0.6V -O ID+ ID- 2SC5197 2SA1940 +0.6V -0.6V -0.6V -55.8V -22.8V +55.8V +55.8V +56.3V +56.3V -55.7V +0.6V -O NAPS-8889 8A/125V NAPS-8887 VOLUME NAAF-8888 R413 100K

23、 C424 223Z R311 39K R313 100K R314 100K R417 1K R418 1K R575 220K C342 223Z R335 330 R336 330 R337 1M R338 1M R344 330 R345 1M R346 1M R302 1K R349 22K R343 330 R435 220K R301 1K C313 10/50 R304 56K R303 56K R305 220K R306 220K C307 100/10 R312 39K C312 182J Q301:B NJM4565D-X 6 5 7 Q301:A NJM4565D-X

24、 3 2 8 1 4 C314 10/50 C345 223Z R350 22K C308 100/10 R318 1M R317 1M R316 330 R322 1M R321 1M R319 2.2K R324 330 R326 1M R325 1M R323 330 R330 1M R329 1M R327 2.2K R328 2.2K R331 330 R332 330 R333 1M R334 1M R407 3.3K C311 182J C301 471K C302 471K C309 682J C310 682J R307 820 R308 820 R309 470K R310

25、 470K R401 1K C421 223J C422 223J C403 47/25 C407 47/25 R404 220K R405 22K R406 22K C392 101K C391 101K C404 47/25 R391 1K C416 220/16 C971 223Z R951 (1/2W) 2.2 C928 100/50 C931 223Z R491 47K R492 47K R436 2.2K D952 1SS133 Q302 TC9273CNG-010 1 2 3 4 5 6 7 8 9 10 11 12 13 1415 16 17 18 19 20 21 22 23

26、 24 25 26 27 28 C423 223Z C443 NC R44210 C401 47/25 R44110 R461 100K R462 100K R451 3.3K R459 3.3K R460 3.3K R452 3.3K D450 P916B D981 NC D982 NC Q492 RN1241-A Q592 DTC123JS Q591 DTC123JS R411 1.2K R595 10(1/2W) C402 47/25 R402 1K R408 3.3K C408 47/25 R392 1K R599 390(1W) R598 390(1W) R457 3.3K C455

27、 47/25 C435 NC Q402:A 3 2 8 1 4 Q491 RN1241-A C456 47/25 R458 3.3K C428 NC C429 NC Q401:B 6 5 7 Q401:A3 2 8 1 4 R403 220K P301 P302 D983 C981 NC C591 103J C592 103J D591D592 RL592 5 2 16 3 4 P501 R414 100K C442 4.7/50 C436 NC R315 330 R320 2.2K C319 NC C320 NC C323 NC C324 NC P915B P917A NC C341 223

28、Z J594 NC P917C NC R952 (1/2W)2.2 P917D NC J593 D951 NC J591 J592 Q925 NC C433 103J C434 103J C412 47/25R4121.2K C411 47/25 P914B RL450 RL921 C343 223Z J596 NC R339 330 R340 330 R341 1M C329 LIST R342 1M C330 LIST P303 C459 103J C953 4.7/50 + RL922 R925 10(1/2W) JL261B 1 2 3 4 D921 RL1N4003 GP104003

29、E D922 MTZJ33D Q924 2SA965-Y D954 MTZJ4.7B Q493 KRA102M D491 1SS133 C941 10/50 J103 R953 100K J101 C925 334J C919 330/35 C918 1000/35 C918A NC J902 NC J900 NC R903 NC C912 334J/50V C911 334J/50V P917B NC C305 152J C306 152J C303 47/25 C304 47/25 C441 100/16 R924 560(1/2W) R455 22K R456 22K C415 220/

30、16 C527 47/63 C528 47/63 J102 C534 102J C532 102J C531 102J C533 102J C535 102J C536 102J Q452 DTC123JS C426NC C425NC E591 E592 D953 1SS133 E593 NC C930 223Z R932 330K R934 100(1/2W) R594 (1/2W) 2.2 R573 10K R572 22K C582 223Z Q583 2SA970 R574 47K R593 (1/2W)2.2 R571 33K Q581 2SC2240 Q582 2SC2240 C5

31、26 NC + C526A NC + C315 220/16 C316 220/16 R352 10 R351 10 R353 10 R354 10 C353 22/50 C354 22/50 JL913B D571 MTZJ5.1B C583 1/50 C317 LIST C318 LIST C321 LIST C322 LIST C325 LIST C326 LIST C327 LIST C328 LIST C331 C332 C405 101K C406 101K C409 LIST C410 LIST Q403:A Q403 : NJM2068L-D 3 2 8 1 4 C453 10

32、1K Q403:B 6 57 C454 101K C457 101K# C458 101K# C581 100/16 Q481 TA7291SG 1 2 3 4 5 6 7 8 9 RL591 4 3 61 2 5 R931 3.3K (1/4W) R933 22(1/2W) R904 NC R905 NC R901 NC R900 NC Q922 79M12 3O2 I 1 G C923 10/50 C922 33/50 C921 223Z C920 223Z J901 C926 100/50 J595 NC J903 P702B 1 2 3 4 5 6 7 8 9 10 11 12 13

33、P701B 19 15 10 5 JL716B TO_NADIS-8887 SD-3 : C2 1 2 3 JL711B 3 2 1 R906 NC JL613A P705B 1 34 2 P704B 1 34 2 C915 C916 C924 334J D911 D10XB60H 1 3 4 2 R415 100K 2 6 5 3 9 4 8 1 7 R393 250K 4 1 92 8 3 R409 100K 8 4 9 5 3 6 2 1 7 Q921 78M12 3 O 2 G 1 I R919 1(1/2W) D918A D918 D3SBA20 Q921A HEATSINK 4 3

34、1 2 R935 D924 GP104003E RL1N4003 D986 NC C983 NC D984 C982 222J D985 NC Q402:B 6 5 7 JL918B D920 RL1N4003 GP104003E C525 NC + C525A NC + R419 3.3K R420 3.3K C418 47/25 C451 47/25 C452 47/25 R454 220K R453 220K C461 47/25 C462 47/25 C417 47/25 R501 470 R565 120K C501 47/50 + R507 47 R509 47 C519 104J

35、 R519 1K R517 1K R521 (1/2W) 82 R577 120K R563 100K D511 1SS133 R561 270 C503 101K R503 27K Q507 Q531 R581 5.6K R583 3.9K R587 2K R589 3.3K Q533 R567 22 C509 10/50 + R579 100 C511 NC Q503 R531 18K R525 (1/2W) 68 R527 (1/2W) 82 C521 10/50 + Q513 Q515 R547 0.22(5W) C515 101K R515 1.5K C505 220/25 + C5

36、97 NC C523 020C Q509 C507NC R569 22 R545 22K L501 J691 NC R555 (1W)8.2 C517 473J P597A NC P597B NC C513 47/25 + P511 R535 18K C595 NC C529 NC R513 56K R533 56K R543 (1/2W) 220 R541 (1/2W) 2.2 R539 (1/2W) 2.2 R591 (1/4W) 2.2 Q501 R505 10 Q529 BL2SC2458-GR R549 3.3K R585 820 Q519 2SA1930 Q517 2SC5171

37、Q523 R511 5.6K Q505 Q505, 506 : 2SC2240-GR, -BL R523 (1/2W) 82 R553 47K Q527 2SC2229-Y R551 33K R529 (1/2W) 47 R502 470 R566 120K C502 47/50 + R508 47 R510 47 C520 104J R520 1K R518 1K R522 (1/2W) 82 R578 120K R564 100K D512 1SS133 R562 270 C504 101K R504 27K Q508 Q532 R582 5.6K R584 3.9K R588 2K R5

38、90 3.3K Q534 R568 22 C510 10/50 + R580 100 C512 NC Q504 R532 18K R526 (1/2W) 68 R528 (1/2W)82 C52210/50 + Q514 Q516 R548 0.22(5W) C516 101K R516 1.5K C506 220/25 + C598 NC C524 020C Q510 C508NC R570 22 R546 22K L502 J692 NC R556 (1W) 8.2 C518 473J P598A NC P598B NC C514 47/25 + P512 R536 18K C596 NC

39、 C530 NC R514 56K R534 56K R544 (1/2W) 220 R542 (1/2W) 2.2 R540 (1/2W) 2.2 R592 (1/4W) 2.2 Q502 R506 10 Q530 BL2SC2458-GR R550 3.3K R586 820 Q520 2SA1930 Q518 2SC5171 Q522 Q524 R512 5.6K Q506 R524 (1/2W) 82 R554 47K Q528 2SC2229-Y R552 33K R530 (1/2W) 47 JL917B F912 J912 J911F911 JL918A D912 D10XB60

40、H P919 R921 0.47(1/2W) P915A P916A P914A 8 9 10 11 12 13 14 16 15 18 17 JL917A C991 104J R922 0.47(1/2W) J991 J992 C992 104J R923 5.6(1/2W) C995 NC JL913A C993 NC C994 NC F913 4A125V (NC) F914 4A125V (NC) R644 8.2K R643 8.2K C648 223Z P641 WS-CLAMP P642 WS-CLAMP JL613B R641 47 1 52 63 Refer to follo

41、wing table about the parts displayed by mark LIST. NC = No mount of parts. SD-Z : XY Location of connected terminal in schematic diagrams. SD-Z = Schematic diagrams-Z. X = A to H, Y = 1 to 5. To POWER TRANS. SD-4 : E1 THE COMPONENTS IDENTIFIED BY MARK ARE CRITICAL FOR SAFETY REPLACE ONLY WITH PART N

42、UMBER SPECIFIED. VOLTAGE (MEASURED WITH VOLTMETER) IS DC VOLTAGE.(NO INPUT SIGNAL). ALL PNP TRANSISTORS ARE EQUIVALENT TO 2SA1015-GR UNLESS OTHERWISE NOTED. ALL NPN TRANSISTORS ARE EQUIVALENT TO 2SC1815-GR UNLESS OTHERWISE NOTED. ALL DIODES ARE EQUIVALENT TO 1SS133 UNLESS OTHERWISE NOTED. ELECTROLYT

43、IC CAPACITORS ( ) ARE IN uF/WV. ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED. EX) 030- 3pF 330- 33pF 331- 330pF 333- 0.033uF ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED. THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS. EX) PRINTING SIDE CIRCUIT IS SUBJECT TO CHAN

44、GE FOR IMPROVEMENT. ! NOTE POWER AMP. L ch POWER AMP. R ch U08 AMPLIFIER PC BOARD U09 TRANS. SEC. TERMINAL PC BOARD U10 VOLUME PC BOARD SELECTOR NC Q501-504 : 2SC2240-BL Q507 - 510, 513, 514 : 2SA949-Y Q515, 516 : 2SC2229-Y Q531 - 534 : 2SC1740S-S R587 : IDLING ADJUST R588 : IDLING ADJUST Q521 OUT I

45、N DISPLAY PCB NC NC NC U07 HEADPHONE JACK PC BOARD NAETC-8882 P503 PHONES 3 2 1 C876 104Z C874 102J C875 102J L855 220M L853 220M L854 220M P504 JL711A 3 2 1 +12V -12V +57.6V +57.6V -57.6V -57.6V 0V 0V +1.2V +1.2V -1.2V -1.2V -12V +12V C317, 318 C321,322, C325-330 C409, 410 None101K MDCMPPTYPE - +5.

46、6V 0V +12V -12V -12V +12V A 1 2 3 4 5 BCDEFGH TX-8255 SCHEMATIC DIAGRAMS-1 AMPLIFIER SECTION TX-8255 DATA CLK POFF2 TU_L TU_R SE1H PROTECT PROTECT STB VOL_UP SP_A SP_B SP_A SP_B DIRECT +12VA DIRECT VOL_DN AMUT MON-A MON-B +12VA 5.6V -12VA VOL_DN VOL_UP STB AMUT DATA MON-A +12VS MON-B +12VR CLK +10S

47、FLAC2 FLAC1 FLAC1 FLAC2 -VP SE1H L2 R2 E R3 E E L3 MTR+ MTR- MTRG R L R L L VIDEO TREBLE BASS VS NC OUT1 VREF IN1 GND MOTOR DRIVE BALANCE PHONO EQUALIZER SEL STB DATACL GND T2 REC T2 PLAY VSSVDD PHONO CD T1 PLAY DVD V REC V PLAY TUNER PHONO L R R L R L CD OUT TAPE 1 IN TAPE 2 R L R L R L RLGND T1 RE

48、C P918 BUS RLGND +12V -12V TU_GND TS_GND SPEAKERS R LL R AB IN2 OUT2 VCC IN LINE 1/DVD IN LINE-2 IN R V_GND RLGND MPUGND RL1N4003 1SR139-100 D915,D921: GP104003E NC NAAF-8886 MPUGND To NADG-8876 SD-2 : G3 MICROPROCESSOR PCBNC D401-D404 : 1SS133 or 1SS270 Q401-Q402 : NJM2068L-D C915, 916 : 8200/56 NC

49、 ID+ ID- 2SC5197 2SA1940 +0.6V -0.6V -0.6V -55.8V -22.8V +55.8V +55.8V +56.3V +56.3V -55.7V 0.6V -O ID+ ID- 2SC5197 2SA1940 +0.6V -0.6V -0.6V -55.8V -22.8V +55.8V +55.8V +56.3V +56.3V -55.7V +0.6V -O NAPS-8889 8A/125V NAPS-8887 VOLUME NAAF-8888 R413 100K C424 223Z R311 39K R313 100K R314 100K R417 1K R418 1K R575 220K C342 223Z R335 330 R336 330 R337 1M R338 1M R344 330 R345 1M R346 1M R302 1K R349 22K R343 330 R435 220K R301 1K C313 10/50 R304 56K R303 56K R305 220K R306 220K C307 100/10 R312 39K C312 182J Q301:B NJ