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hfe_onkyo_ht-r8230_service


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                                                      HT-R8230

                                                Ref. No. 3817
                                                      082004
          SERVICE MANUAL


       AV RECEIVER
 MODEL HT-R8230




                                                 RC-479S
           Silver model

  SMDD      120V AC, 60Hz




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.
                                                                                                                                             HT-R8230

SERVICE PROCEDURES
1. Replacing the fuses                                                      5. Memory Preservation
                                                                             This unit does not require memory preservation batteries.
                  This symbol located near the fuse indicates that the
                                                                             A built-in memory power backup system preserves the contents of
  fuse used is show operating type, For continued protection against
                                                                             memory during power failures and even when the power cord is unplugged.
  fire hazard, replace with same type fuse, For fuse rating, refer to
                                                                             The power cord must be plugged in order to charge the backup system.
  the marking adjacent to the symbol.
                                                                             The memory preservation period after the unit has been turned off varies
                Ce symbole indique que le fusible utilise est e lent.        depending on climate and placement of the unit. On average, memory
  Pour une protection permanente, n'utiliser que des fusibles de meme        contents are protected over a period of a few weeks after the time the unit
  type. Ce demier est indique la qu le present symbol est apposre.           has been turned off.
                                                                             This period is shorter when the unit is exposed to a very humid climate.

  REF. NO.     DESCRIPTION          PART NO.       REMARKS
  F6901        8A-UL                252198         !
  F6901 or     8A-T/UL-ST2          252261         !
  F6902        8A-UL                252198         !
  F6902 or     8A-T/UL-ST2          252261         !
  F901         8A-UL                252198         !
  F901 or      8A-T/UL-ST2          252261         !
  F903         5A-UL/T-237          252164         !
  F903 or      5A-T/UL-ST2          252258         !


2. Safety-check out
  (Only U.S.A. model)
  After correcting the original service problem perform the
  following safety check before releasing the set to the customer
  Connect the insulating-resistance tester between the plug of
  power supply cord and terminal GND on the back panel.
  Specifications: More than 10Mohm at 500V


3. To initialize the unit
  This device employs a microprocessor to perform various
  functions and operations. If interference generated by an external
  power supply, radio wave, or other electrical sauce results in accident
  which causes the specified operations and functions to operate
  abnormally.
  To perform a result, please follow the procedure below.

  1. Press and the hold down the VIDEO 1 button , then press the
      STANDBY/ON button when the unit is Power ON.
  2. After " Clea r " is displayed, the preset memory and each mode
     stored in the memory, are initialized and will return to the
     factory settings.


4. How to check version of microprocessor?
  Main microprocessor Q7008.
  1. Press and the hold down the DISPLAY button , then press the
     STANDBY/ON button when the unit is Power ON.
     Version is displayed on FL display only for 3 seconds.
        ex.
               Version 04212a
  2. Press the STANDBY/ON button to Power Off.
                                                                                                                                                  HT-R8230



EXPLODED VIEWS-1                                                                                                                                   A051
                                                                                                                                                    x6
                                                                                                              A050
        P901                                                         U27                        P101
                                    A024       U08
                       A404
                       x 24                             A035         U09     U25
                              A401
               A028

                                              U23
                                                                                         A020
                                                 U26                              U01     x6
                                             A022

                                U12
                                                               A030
                                     Refer to
                                      in
                                     EXPLODED                              A036                                 P7502
                        F6901        VIEWS-2                                x 2 U10
                   A021                                                                         P7503
                             F6902
                    x2                                                                                                  U02
  U19            F903                                                                            A005                         Refer to
                 F901                                                                            x 10                          in
                                                                              A025                                            EXPLODED VIEWS-2

          A023                                                                    A007
           x4                         A021                                         x3                                                A410
                                               U17              A021

           U18                          U20                                                                    A414
A026                                                                                                    A412                                            A060

                                                                                        A411           A413
                              U11                                             U03
                T901
                                                                                   A004

                                                                           A010
                                                                                                                                                 A065
                                                                            A055           U04
                                                              A015           x4
                                                                                                       A002                   A420   A435
                                                                            A056                        x2




                                                                                                                                                               HT-R8230
                                    P800                 A017                x8
                                     x8
                                     A017              A016                A057                                A421
                                      x2                x2                  x4                                  x3
                                                                                                       HT-R8230



EXPLODED VIEWS-2


                                        


                                                               FRONT PANEL INSIDE VIEW




                                                                        A418               A415
            Q6050A                                       A416           (L=215mm)          (L=135mm)
              x10                                        (L=85mm)



A037
 x10


   Q6050
      Q6060
           Q6051
              Q6061
                Q6052
                                       Q6064
                      Q6062
                          Q6053    Q6054
                               Q6063
                                                                                    A416
                                                                    A417
                                                                                    (L=85mm)
                                                                    (L=160mm)




                                                                                                             HT-R8230
                                                                                                                                                                                                                   HT-R8230
                              A                                                      B                                                                                         C                                          D
    BLOCK DIAGRAM

                                                           78
                                                                              TUNER UNIT                                               MAIN MICROPROCESSOR

                                                           77
1                         L        2                                                                                                                                                                                             INPUT GAIN
                   CD                                                                                                                                                                                                                            69
                                                                                                                                                                                                                                       0/6dB
                        R          1


                          L       72                                                                                                                                                                                             INPUT GAIN
            TAPE OUT
                        R         71                                                                                                                                                                                                   0/6dB     66


                          L        4
                                                                                                                                                                                                                                 INPUT GAIN
              TAPE IN
                        R          3                                                                                                                                                                                                             43
                                                                                                                                                                                                                                       0/6dB
                                                                             Q301 BD3811K
                          L        6
                                                                             SELECTOR/TONE CONTROL
              VIDEO 3                                                        /VOLUME                                                                                                                                             INPUT GAIN
                        R          5
                                                                                                                                                                                                                                       0/6dB     40

                          L        8
           VIDEO 2 IN
2                       R          7                                                                                                                                                                                             INPUT GAIN

                                                                                                                                                                                                                                       0/6dB     30
                          L        76
          VIDEO 1 OUT
                        R          75                                                                                                                                                                                            INPUT GAIN

                                   10                                                                                                                                                                                                  0/6dB     33




                                                                                                                                                                INPUT ATT.
                          L




                                                                                                                                                                     -6dB
           VIDEO 1 IN
                        R          9
                                                                                                                                  18




                                                                                                                                                                                            23
                                                                                                                                                                                            21
                                                                                                                                                                                                 26
                                                                                                                                                                                                 25
                                                                                                                                                                                                 28
                                                                                                                                                                                                 27




                                                                                                                                                                                                                   24
                                                                                                                                                                                                                   22
                      L            12                                                                                             NC
                 FRONT
                      R            11
                                                                                                                                  20
                                   14                                                                                             NC
                          L
           SURROUND
    DVD                 R          13                                                                                                                                                                  Q302(1/2)                       POWER SUPPLY

                                   16                                                                                                                                                                                            +7V     Q321
3             CENTER
                                                                                                                                                                               L
                                                                                                                                                                                    Q804
                                                                                                                                                                                                            10.5dB
                                                                                                                                                                                                                                         78L07
                                   15                                                                                                                                              50KLPF                                        -7V
          SUB WOOFER                                                                                                                                                                                                                     Q322
                                                                                                                        17
                                                                                                                             19




                                                                                                                                                                                                       Q302(2/2)
                                                                                                                                                                                                                                         79L07
                                                                                                                                                                               R
                                                           2CH A/D                                                                      Q801                                       50KLPF                                        +2.5V
                                                            96/24                                                                      AK4586                                                                                          Q7004
                                                                                                                                                                                                                          DSP    +3.3V BA33C25
                                                                                                                                                                                    Q803
            COAXIAL                                                                                                                                                           SL
                                                                                                                                                                                   50KLPF
    DIGITAL IN                                                                         Q701
                                                     DIR
                                                                                     CS493264                                            96/24
                                                                                                                                        6CH D/A                               SR
            OPTICAL
                                                                       OSC                      DSP                                                                                50KLPF
                                  Q281
                                                                                 RST.CS.INTREQ/CL/DA




                                  74HCU04                            12.288MHZ                                                                                                      Q802
                                                                                                                                                                               C
                                                                                                                                                                                   50KLPF
                                                                                                                                                RST.CS/CL/DA/
                                                                                                                                                CDTO/INT1.2.




                                                                                                                                                                              SW
                                                                                                                                                                                   50KLPF
                                                                                 /SCDO




4
                                         CTLA/B




                          VIDEO
                                                                                                VMUT2
                                                                                                        VMUT1




              VIDEO3 IN

                                                  Q203                                                                                                                                                12.5MHZ
                                                  LA7956
                                                                                MUTE                            VIDEO
              VIDEO2 IN
                                                                             Q202
                                                                                                                   MONITOR OUT                                                                           MAIN
              VIDEO1 IN                                                                                                                                                                            MICROPROCESSOR
                                                                             Q201
                                                                                                                   VIDEO 1 OUT                                                                          Q7008
                 DVD IN
                                                                                                                                                                                                  MPD784225GC-249-8BT
                                        VIDEO SELECTOR
                                                                                                                                                                                                                          BACK
                                                                                                                                                                                                                          UP
                                                                                                                                                                                                           5MHZ
                                                                                                                                                                                 U7501
                   RI                   RI                                                                                                                                                                                               Q7501   16B
                                                                                                                                                                             REMOTE SENSOR               SUB
                                    INTERFACE                                                                                                                                                                                                 FL TUB
                                                                                                                                                                                                   MICROPROCESSOR
                                                                                                                                                                                                        Q7502
                                                                                                                                                                                                  MPD780232GC-030-8BT
5                                                                                                                                                                                                                                         OPERATION

                                                                                                                                                                                                                STANDBY
                                                                                                                                                                                                                 D7507
                                                                                                                                                                                                                                              HT-R8230
                                             E                                                   F                                                              G                                                                H




                                                                                                                                    POWER
          0,,-103dB MASTER VOLUME
                                                                      BASS                                                          AMPLIFIER
69       68 OUTPUT GAIN       BASS/TREBLE                                                                                                                                                                                            PHONES
                                                                      BOOST
                                                                               55     MUTING
                   0-18dB                                                                                                                  +27dB
                                                                                    Q307
                                                                                                                                                                                         RL6600
66       65 OUTPUT GAIN                          BASS/TREBLE                                                                                                                                                                         L
                                                                                                                                                                                                                                       FRONT
                                                                                      MUTING
                   0-18dB                                                      57                                                          +27dB                                                                                     R SPEAKERS-A
                                                                                    Q308                                                                                                                                              CENTER
                                                                                                                                                                                                                                      SPEAKER
43       42 OUTPUT GAIN
                                                                                                                                                                                         RL6604
                   0-18dB                                                     38                                                           +27dB                                                                                     L
                                                                                                                                                                                                                                       SURROUND
                                                                                                                                                                                                                                     R SPEAKERS
40       39 OUTPUT GAIN                                                                                                                                                                                                              L
                                                                                                                                                                                                                                       FRONT
                   0-18dB                                                     37                                                           +27dB                                                                                     R SPEAKERS-B
                                                                                                                                                                                           RL6601
30       31 OUTPUT GAIN
                                                                                                                                                                                               RL6603
                   0-18dB                                                     35                                                           +27dB



33       34 OUTPUT GAIN
                                                              15dB
                   0-18dB                   36                                        MUTING                 SWPO                SUBWOOFER
                                                            Q305
                                                                                    Q312        Q313                             PREOUT



                                                                                                       Q306                                        DC VOLTAGE
                                                                                                                                                   DETECTION
                                                                                                                                                   OVER CURRENT                D6704
                                                                                                                                                   DETECTION
                                                                                                                                                   Q6701~6703
PPLY
                                                                                                                                                   VOLTAGE
        +12VAF                                                                                                                                     LEVEL SENSOR

        -12VAF
                                                                                                                                     R6380
                                                                                                                                    THERMAL
                                                                                                                                    SENSOR                    D6703
       +5V
5

                                                                                                                                                                                                             HPDET
                                                                                                                                                                      VOLH




                                                                                                                                                                                                SPCS
                                   SELMUT




                                                                                                                                                                                   PRO




                                                                                                                                                                                                       SPB
                                                                                                                                                                                         SPF
                   SELDA




                                                                                                     AMUT
                           SELCL




                                                                                                                                                                       POWER
                                                                                                                 SEC1H




                                                                                                               SEC1H/L
                                                                                                                                         SUB
                                                                                                               CONTROL
                                                                                                                                     TRANSFORMER
                                                                                                                                           T902
                                                                                                                         D921
                                                      +5.6V                                                              -924
                                                                  Q6931
                      MICROPROCESSOR                            NJM78M56A


                                                                                                       RL6901                                          F901    RL901
                                                      -VP
                 SUB MICROPROCESSOR                                Q9501
                                                                                               +B1H                      +B1L       SEC1
                                                                                         +B1                                                                      P902
                                                      +12V         Q6405
                               VIDEO SECTION                                        POWER      D6903                                                              AC OUTLET
                                                                   78M12                                                 D6904                                                                                       AC IN
                                                                                    AMP.
                                                                                         -B1                                                                                                                         120V 60Hz
                                                                                                       RL6902                                PRI.
                                                      -12VAF       Q6402
                                                                                                            RELAY                   SEC2
                                   PREAMPLIFIER                    78M12
                                                                                                            +B2
                                   SECTION            -12VAF       Q6403
                                                                   79M12                                            D9502
                                                                                                                    -9504
    16BT123GK                                                                                                                       SEC3
                                                                                                                    D9509
    TUBE                                              +5VDSP           Q4606                                        -9512
                                      DSP SECTION
                                                                       78M05

ATION KEY                                                                                                                FLAC
                                                                                                            FL TUBE
                                                                                                                         FLAC
                                                                                                                                        T901
                                                                                                                                        MAIN
                                                                                                                                    TRANSFORMER
                                                                                                                                                                                                                                                                                                                                                                                                                                         HT-R8230
                           A                                                                 B                                                                                                                                    C                                                                                                                                                                                                                                                     D
    SCHEMATIC DIAGRAMS-1                                                                                                                                                                                                                                                                                                                                                                Q321                  78L07
    PREAMPLIFIER SECTION                                                                                                                                                                                                                                                                                                                                                          +7V
                                                                                                                                                                                                                                                                                                                                                                                                  O G I




                                                                                                                                                                                                                                                                                                                                                                               10/16

                                                                                                                                                                                                                                                                                                                                                                                          C359




                                                                                                                                                                                                                                                                                                                                                                                                                                         C366
                                                                                                                                                                                                                                                                                                                                                                                                                                         104Z
                           P301
                                          R300                                        CDR                                                                                                                                                                                                                                                                                                                                                                                                                                            Q6402




                                                                                                                                                                                                                                                    P261A
                                                                                                                                                                                                                                                      NC
                                                 C301 C300




                                                                          R323 R322
                                           330                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       78M12                         R6402




                                                                               NC
                                                                                                                                                                                                                                                                                                                                                                                       Q322                   79L07                                                                                                                                                10 1/2W
              CD




                                                                                                                                                                                                        R345 R346
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    +12VAF




                                                                                                                                                                                                              NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         O G I
                                                                                                                                                                                                                                                                                                                                                                           -7V                    O G I                                                                                                C6404                                                         C6403




                                                                          NC
                                          R301                                        CDL                                                                                                                                                                                                                                                                                                                                                                                                              10/16                                                         223Z




                                                                                                                                                                                                                                                                                                                                                                                          C362




                                                                                                                                                                                                                                                                                                                                                                                                                       C367
                                                                                                                                                                                                                                                                                                                                                                               10/16




                                                                                                                                                                                                                                                                                                                                                                                                                                      104Z
                                                                                                                                                                                                         NC
                                          330                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Q6403 79M12                             R6403
                                          R302                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     33 1/2W

1                                                                                     TOR                                                                                                                                                                                                                                                                                                                                                                                                           -12VAF
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         O G I




                                                                          R325 R324
                                                 C303 C302
                                           330




                                                              101J 101J
                                                                                                                                                                            TUL                                                                                                                                                                                                                                                                                                                        C6406                                                          C6405




                                                                               NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       10/16                                                          223Z
       TAPE OUT                                                                                                                                                             TUR




                                                                          NC
                                          R303                                                                                                                                                                                   C329                         C330                                                                                                                                                                                                                                                         Q6405 78M12                                       R6407
                                                                                      TOL                                                                                                                                        10/16                        10/16                                                                                                                                                                                                                                                                                                          3.3 1W
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     +12VVD                              O G I
                                          330




                                                                                                                                                                                                    TOR
                                                                                                                                                                                           TOL
                                                                                                                                                       TUR
                                                                                                                            V4R


                                                                                                                                              TUL
                                                                                                                                     V4L




                                                                                                                                                               75 V1OR
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       C6410




                                                                                                                                                               76 V1OL
                                          R304                                        TIR                                                                                                                                                                                                                                                                                                                                                                                                                                                    C6409                          R6408 NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       10/16                                 223Z

                                                 C305 C304



                                                                          R327 R326
                                           330
                                  C308




                                                                               NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             Q6406 78M05




                                                                                                                               80
                                                                                                                                        79
                                                                                                                                                 78
                                                                                                                                                         77



                                                                                                                                                                            74
                                                                                                                                                                                      73
                                                                                                                                                                                            72
                                                                                                                                                                                                        71
                                                                                                                                                                                                                        70
                                                                                                                                                                                                                                   69
                                                                                                                                                                                                                                             68
                                                                                                                                                                                                                                                      67
                                                                                                                                                                                                                                                              66
                                                                                                                                                                                                                                                                        65
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       R6410
          TAPE IN                 103Z
                                                                                                                                                                                                                                                                                                          C335                                                                                                                                                                                     +5VDSP
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         



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