Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio A-905-TX Onkyo-A-905-TX-Service-Manual

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Onkyo-A-905-TX-Service-Manual


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                                                                                                                                                                                                      A-905TX

                                                                                                                                                                                              Ref. No. 3677
                                                                                                                                                                                                    052001
                                                                    SERVICE MANUAL
INTEGRATED STEREO AMPLIFIER

                                                              A-905TX

                                                                                                                                   STANDBY/ ON                          GRAPHIC EQ
                                                                                                                                              CLOCK         SLEEP     EFFECT   MODE



                                                                                                                                         PRESET                      TUNER INPUT
                                                                                                                                                              FM         AM

                                                                                                                                                                                    TAPE


                                                                                                                                                                     PAUSE / STEP    DVD


                                                                                                                                    REPEAT    SCROLL                                  MD


                                                                                                                                     PLAY MODE CLEAR          REC



                                                                                                                                    REPEAT    RANDOM                                  CD


                                                                                                                                    MEMORY    CLEAR
                                                                                                                                                             DISC

                                                                                                                                    REPEAT PLAY MODE                                 CDR


                                                                                                                                     TONE     CLEAR           REC


                    INTEGRATED STEREO AMPLIFIER                                                                                                                                     MUTING
                                                                           VOLUME                      WIDE RANGE AMP TECHNOLOGY
                                                                                                                                     TIMER         1          2          3
                                                                                                          INPUT

                                                                                                                                                   4          5          6
                                                                                                                                    UP/DOWN
                                 CD       MD       TUNER       TAPE
  STANDBY/ON
                                                                                                                                                   7          8          9          VOLUME
                                                                                                                                                                     ACOUSTIC
                                                                                                                                                                     PRESENCE
                                                  LINE/ DVD   CDR/PC
                                                                                                                                     ENTER       --/- - -   10 / 0
      STANDBY
                                                                                       DIRECT

                                                                                                                                                            REMOTE CONTROLLER       RC-456S
                                                                                    SOURCE DIRECT
                              BASS             TREBLE           BALANCE                DIRECT                   ACOUSTIC
  POWER         PHONES                                                                          TONE            PRESENCE




 ON     OFF                                                                                                       OFF /1/ 2
                         --          +     --        +          L      R
                                                                                                                   A-905TX




                                         UDT                        120V AC, 60Hz
                                         UPT                        230-240V AC, 50Hz




 SAFETY-RELATED COMPONENT
 WARNING!!
  COMPONENTS IDENTIFIED BY MARK                                                                          ON THE
  SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
  CRITICAL FOR 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 CUSTOMER.
                                                                                                                        A-905TX

SPECIFICATIONS
PART-XX




SERVICE PROCEDURES
PART-XX the fuses
 Replacing

                 This symbol located near the fuse indicates that the   REF.NO.    PART NO.       DESCRIPTION
 fuse used is show operating type, For continued protection against     F901      252158          1.6A-UL/T-237, Fuse 
fire hazard, replace with same type fuse , For fuse rating, refer to 252069 0.8A-SE-EAK, Fuse the marking adjest to the symbol. F902-F904 252075 2.5A-SE-EAK, Fuse Ce symbole indique que le fusible utilise est e lent. NOTE: Pour une protection permanente, n'utiliser que des fusibles de meme
: Asian model only for 120V type. Ce demier est indique la qu le present symbol est apposre. : Asian model only for 230V A-905TX CHASSIS EXPLODED VIEW A49 A47 ############ A46 P901 U3 P402 A49 A49 U2 P584A P402 A40 U8 A81 U7 A11 A10 U1 U5 A11 P701 P801 A49 A10 A10 A11 Q527 A1 A27 A34 Q525 A56 Q523 A13 A25 A27 A51 A41 A54 A53 A55 Q524 U9 A28 A43 A26 A10 A10 A58 A61 A10 Q526 Q528 A67 A43 F901 A34 A10 F904 F903 A50 F902 A52 A63 A16 U10 A65 T901 A64 A66 A11 U4 A11 E860 A73 A73 A-905TX CHASSIS EXPLODED VIEW PARTS LIST ############ REF NO. PART NO. DESCRIPTION REF NO. PART NO. DESCRIPTION A1 27111123 Front bracket P402 27190011 KGLS-6S, Holder A10 838130088 3TTB+8B, Self tapping screw P584A 880009 Plastic rivet, NRP-345 A11 838430088 3TTB+8B(BC), Self tapping screw P701 27191106 UAMS-05S-2, Holder A13 28198862 Facet, VOL P801 25055436 or NPLG-2P418, Shorted plug A16 27100375D Chassis 25055945 A25 27160451B Heat sink
P901 253277MIL AS-UC-2#18, Power supply cord
27160452B Heat sink 253193HIT AS-CEE, Power supply cord A26 29110083 Adhesive tape, CROSS-16U Q523,Q524 2202303 or * 2SC4512-O or A27 801525 3TTB+8B(BC), Special screw 2202304 or * 2SC4512-Y or 838430088 3TTB+8B(BC), Self tapping screw
2202305 * 2SC4512-P, Transistor A28 801433 3SMS8W.SW+14B(BC), special screw Q525,Q526 2202313 or * 2SA1726-O or A34 27141530A Retainer, HS-2 2202314 or * 2SA1726-Y or A40 27300750 Bussing cord 2202315 * 2SA1726-P, Transistor A41 27122831 Rear panel
Q527,Q528 2212654 or * 2SC3421-Y or 27122832 Rear panel 2212653 * 2SC3421-O, Transistor A43 830440089 4TTC+8C(BC), Self tapping screw T901 2301423 NPT-1374D, Power transformer
A46 28184759-1 Top cover 2301424 NPT-1374P, Power transformer A47 29362571 Label, WARNING U1 1A905530-4B NADG-6630-4B, Main circuit PC board ass'y
A49 838930088 3TTB+8B(UN), Self tapping screw 1A905530-4C NADG-6630-4C, Main circuit PC board ass'y A50 838430107 3TTB+10S(BC), Self tapping screw U2 1A905531-4B NAAF-6631-4B, Preamplifier circuit PC board ass'y
A51 27212298 Front panel 1A905531-4C NAAF-6631-4C, Preamplifier circuit PC board ass'y A52 28198894 Facet 7P U3 1A905532-4B NAAF-6632-4B, Acoustic circuit PC board ass'y
A53 28198895 Facet 1P 1A905532-4C NAAF-6632-4C, Acoustic circuit PC board ass'y A54 28198925 Facet A U4 1A905533-4B NAPS-6633-4B, Power supply circuit PC board ass'y
A55 27268037 Guide A 1A905533-4C NAPS-6633-4C, Power supply circuit PC board ass'y A56 28325133 Knob, FM U5 1A905534-4B NADIS-6634-4B, Display circuit PC board ass'y
A58 28191798 Clear plate, RE 1A905534-4C NADIS-6634-4C, Display circuit PC board ass'y A61 28325926 Knob, INPUT U7 1A905536-4B NAETC-6636-4B, Speaker terminal PC board ass'y
A63 28135247Y Badge 1A905536-4C NAETC-6636-4C, Speaker terminal PC board ass'y A64 28325925 Knob, VOL U8 1A905537-4B NAETC-6637-4B, Terminal PC board ass'y
A65 28325674 Knob, TD 1A905537-4C NAETC-6637-4C, Terminal PC board ass'y A66 28325927 Knob, TONE U9 1A905539-4B NAETC-6639-4B, Power switch PC board ass'y
A67 28325673 Knob, POWER 1A905539-4C NAETC-6639-4C, Power switch PC board ass'y A73 27175323 Leg AS U10 1A905540-4C NAETC-6640-4C, Fuse PC board ass'y A81 29362630 Label, PROCESSOR F901 252158 1.6A-UL/T-237, Fuse
252069 0.8A-SE-EAK FSBFUSE, Fuse F902-F904 252075 2.5A-SE-EAK FUSE NOTE:
: Asian model only for 120V NOTE: THE COMPONENTS IDENTIFIED BY MARK : Asian model only for 230V ARE CRITICAL FOR RISK OF FIRE AND CAUTON : ELECTRIC SHOCK. REPLACE ONLY WITH Replacement of the transistor of mark * ,if necessary, PART NUMBER SPECIFIED. must be made from the same beta group(HFE) as the original type. A-905TX A B C D E F G SCHEMATIC DIAGRAM-1 TO NAAF-6631 P405B P405C POWER2 R R E NADG-6630 Acoustic Presence E L L AMP&VR R551 2.2 SUBWOOFER PREOUT R543 (1/2W) 100 24.6 P582 24.1 (1/2W) Q523 P307 Q519 Q301 Q531 1 REC LEFT R351 2.2K R353 1M TC9273N-010 1 VEE VDD 28 R571 1.2 Q527 2SC3421 Q515 R547 15 2SA965 L503 2SC4512 R601 R603 680 2SC1845 R581 680 R352 R354 220 2SC1845 R582 TO NAAF-6632 TO NAAF-6631 R567 (1/2W) SPEAKERS RIGHT 1M R557 1K 10K SPEAKER TERMINAL PC BOARD 2.2K 2 CDR-P 27 P401A TO NAAF-6632 P403A P501A TO NAAF-6631 P502A 1.8K 10 (1/2W) C531 R607 C581 471 U7 JL581C JL581A CDR/PC 10K R583 P301 C515 R555 223Z R569 R561 R301 R303 *C301 3 CD 26 10/16 82 10K C309 MUTING 101 +B1 1.2K L501 S.BASS3 S.BASS2 S.BASS1 LEFT 0.22*2 POWER2 -B1 +B1 Q529 RL901 NF-L -B1 NF-R L +B2 (1/2W) -B2 330 1M 101K E R R E E E L L 2SC1740S (2W) R E PLAY 4 TU 25 L R302 R304 R563 RIGHT R575 4.7 RL901 R 330 1M *C302 5 L/DVD 24 500B R559 (1/2W) Q517 10 (1/2W) 101K R595 R573 2SA992 R549 10 220 C517 P585A P585B R305 R307 *C303 L505 R605 P584 6 MD-R 23 (1/2W) 15 473 LEFT (1/2W) 820 330 1M 101K R593 -1.2 Q521 Q525 2SA1726 R565 C582 CD 7 MD-P 22 10 -24.1 2SC2235 R308 8.2 C923 471 R306 (1/2W) R545 -24.6 (1/2W) 223Z RIGHT 100 R553 P586A P586B 330 1M *C304 8 T-R 21 (1/2W) 2.2 (1/2W) -B1 101K POWER SWITCH PC BOARD REC P302 LEFT R309 2.2K R311 1M 9 10 T-P 20 19 R594 10 (1/2W)



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