Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio TX-NR708 hfe_onkyo_tx-nr708_service_en

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                                                          TX-NR708

                                                    Ref. No. 4213
                                                          062010
              SERVICE MANUAL


              AV RECEIVER
  MODEL TX-NR708(B)/(S)




          Black and Silver models                     RC-768M

B MDC, B MDF                120V AC, 60Hz
B MMP, B MMA, S MMP         220-240V AC, 50/60Hz
B MMR, B MMQ                220-240V AC, 50/60Hz




    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.
                                                                                                                                  TX-NR708


SERVICE PROCEDURE-1

 1. Replacing the fuses

                    This symbol located near the fuse indicates that the
    fuse used is show operating type, For continued protection against
    fire hazard, replace with same type fuse, For fuse rating, refer to
    the marking adjacent to the symbol.

                  Ce symbole indique que le fusible utilise est e lent.
    Pour une protection permanente, n'utiliser que des fusibles de meme
    type. Ce demier est indique la qu le present symbol est apposre.

       REF NO.       PART NAME           DESCRIPTION          PART NO.        REMARKS
       F2000         FUSE                4A-UL/T-233          252325GR
       F2000 or      FUSE                4A-T/UL-ST2          252257GR
       F2001         FUSE                2A-UL/T-233          252320GR
       F2001 or      FUSE                2A-T/UL-ST2          252253GR
       F6901         FUSE                15A-TUL-250V         252303GR
       F6901 or      FUSE                15A-UL/T-314         252197GR
       F6902         FUSE                15A-TUL-250V         252303GR
       F6902 or      FUSE                15A-UL/T-314         252197GR
       F901          FUSE                10A-UL-ST6 N1        252382GR        
       F901          FUSE                5A-SE-EAK            252078GR        
       F901 or       FUSE                5A-SE-TL250V         252278GR        
            
             : 120V,Canadian model
             : 230V,CE(European) country model
             : 230V,Australian model
             : 220/230-240V,Hong kong model
             : 220/230-240V,Chinese model


 2. Safety check out
  (U.S.A. model only)
  After correcting the original service problem, perform the following safety check before releasing the unit to the customer.
  Leakage current Check
  Measure the leakage current to a known earth ground (water pipe or conduct etc.) by connecting a leakage current
  tester between the earth ground and exposed metal parts of the unit (input/output ground terminals, screw heads or metal overlays etc.).
  Plug the power supply cord directly into a 120Vac 60Hz wall socket and turn ON/STANDBY button on.
  Any current measured must not exceed 0.5mA.

 3. Memory Backup
  This model uses a EE-PROM IC in order to retain radio presets and other settings. So, memory contents will be
  kept eternally with no care.

 4. To initialize the unit
 1. ON/STANDBY (Power On)

 2. VCR/DVR + ON/STANDBY.                                       ON/STANDBY       VCR/DVR

               Cle a r                   Stand-by

  Preset memory and each mode stored in the memory, are
  initialized and will return to the factory settings.
                                                                                                 TX-NR708


SERVICE PROCEDURE-2

 5. To check version of Microprocessor, DSP and Video FW(Firmware)
 1. ON/STANDBY (Power On)

 2. DISPLAY + ON/STANDBY.
     [e.g.] TX-NR808
                          Main :
                           1 .03/1 0 7 2 9 A M

 3. TONE    [Tone      ] ---> Forward        [     ] : DTR-40.2/ 50.2, DHC-40.2

   TONE     [Tone      ] ---> Reversed.
                                                                     FW Version displayed
                                                                     only for 3 seconds.
                TONE
                         Ma in:
                          1.0 3 /10729A M                         Main Microprocessor

                TONE                             TONE


                         DS P 1 st/NE T:
                          1 .06/1 0 9 2 2 A M7                    1st DSP/NET (DA830)

                TONE                             TONE


                         DS P 2 n d :
                          1.0 0 /10429aM A                        2nd DSP


                TONE                             TONE


                         V ideo:
                           1 .02/1 0 7 2 9 A S                    Video Microprocessor

                TONE                             TONE

                         V S P (S equoia ):
                           1 .03/1 0 7 0 9 A MA                   VSP (Video Signal Processor)

                                                 TONE


 4. ON/STANDBY (Power Off).

                                          TONE LEVEL
                       ON/STANDBY         TONE LEVEL                DISPLAY
                                                                                                                                                                                                                                                                     TX-NR708
                   A                                   B                              C                                   D                                    E                                F                            G                            H
    EXPLODED VIEWS-1

                                                                                                                                                                                                                   A715                                               A703
                 P921                                                                                                                                                                                              x 6 pcs.
     ONLY                           A253,  ONLY
1
                                                  A279       A269     A261                                        A143    A137
                                                    A281     x 2 pcs. x 5 pcs.                             A145           x 2 pcs.
            A285                                     A271                 A245                                                                                               U0013
     A283
                                       A267                               A251                                                                          A029
                                                                                             A241
                                       x 7 pcs.                             A289                                                                                                   U0011
                 A259                                                       x 2 pcs.                                                                                                                                                                          A701
                 x 7 pcs. EXCEPT 
                 x 6 pcs.  ONLY
                                                                                 A237A
                                                                                                                                                                                                                                                       A705
                                                                                                                                     U0012
                                                                                                                                                                                     Refer to
                A263                                                                                                                                                                  in
                x 2 pcs.                                                                                           U0050                                                             EXPLODED VIEWS-3
                                                                                                                                                                                                                  A031
2               A257                                                                                      U0051                                                                                                   x 3 pcs.
                x 10 pcs.                                                                                                                               A037
                    A264                                                                          U0054                                 F6901
                    A255                                                    U007                                                        F6902
                    x 12 pcs.
                          A181                                P8002
                          x 5 pcs.                                                                                                                                                                                                          A197
                                                                                                          P8641                           U0010                                          A017                                               x 4 pcs.
                                                            U0041                         P2101                                                                                                 A009      U0066                      A195
     A273          P900
     x 2 pcs.                     U011                                                                                                       A035                                                  U0014
                                                                                                                                                                                   A032                                          U0064
                                                                                                                                             x 5 pcs.                                                 U0015
                                                             A131                                                                                                                U0016
                                     P103
                                                                                                                                             A017                                                                       A001
                                  EXCEPT 
                                                                                     F2000
3                                                                                  F2001                                                                              A027
                                                                                                                                                                                                                     A011
                                                    U0052                                                            A247                                      A021
            P906                                                                                                                         A179
                                                                                   A129                                                  x 4 pcs.              x 2 pcs.                                                      A183
    EXCEPT 
                                                                                                                                         A193             A025
                                                            A129                             A143                                                         x 2 pcs.                                    A183
                                                                                                                                                                                                      x 2 pcs.
                                                                                                              T901                              A144                                   A019
                                                                                             U0040
                                                                                                                                                                                 A023                  A013
                                                                                          A127                                                          A119                     x 2 pcs.
                                                                                                                     A191                               x 3 pcs.      P640
                                                                                                                                                                                                       A015
                                                                                           U0030                                                             A117                                      x 4 pcs.
                                                                                                                                                             x 3 pcs.
                                                             A127
4

                                                  U0032                                                                                                            A133

                                                    A125                                                                 A113                                                                                                                           Refer to
                               F901E    F901                                                                                                                              A183                                                                           in
                                                                                                                                                                                                                                                        EXPLODED VIEWS-2
                       A141
                                                                                                                                                                          A081

                                            P9008          U0031                                                                                                              A095
                       U0033                                                                       A135                                                                       x 4 pcs.

5                                                                                                                                                                             A101
                                                                                                                                                                              x 4 pcs.
                                                                                                                         A185                        A123
                                                                                                                                                     x 5 pcs. U0063           A097
                                                                                                                          A395                                                x 4 pcs.
                                                                                                                             A121                   A397
                                                                                                                             x 9 pcs.
                                                                                                                    TX-NR708



 EXPLODED VIEWS-2

                                                      P7501
  

                                        A317
                                        x 2 pcs.
                            A317                      U0065
            A321            x 18 pcs.
                                           A327
               A323                                                       P3101
                                                          U0060

                                                                  A307
                                                                                     A301
                                                                         A305


U0062
  A325                                        U0055
  x 3 pcs.                                                A702                                 A313
        A317
        x 5 pcs.
                   U0061                                                                              A351

                           A303
                              A317                                                      A315
                              x 2 pcs.
                                                                                                             A373
                                  U0067
                                                                                                                    A371
                                  U0080
                                                                            A309


                                                      A393                 A355
                                                      x 5 pcs.                                        A353




                                                                                                                           TX-NR708
                                                                          A391
                                                                          x 3 pcs.
                                                                               TX-NR708



EXPLODED VIEWS-3







                      Q6050A




          A007
          x 14 pcs.

                Q6056
                    Q6066
                       Q6054
                           Q6064
                              Q6051
                                  Q6061
                                     Q6052
                                         Q6062
                                            Q6050
                                                Q6060
                                                   Q6053
                                                       Q6063          Q6050B
                                                          Q6055
                                                              Q6065




                                                                                     TX-NR708
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           TX-NR708/808/1008, TX-NA708/808/1008, HT-RC270, DTR-40.2/50.2, DHC-40.2
                               A                                       B                                                            C                                                                                                     D                                                              E                                                                                   F                                                          G                                                                  H                                                   I                                                J                                           K
     SCHEMATIC DIAGRAMS - 1
     BLOCK DIAGRAM AUDIO SECTION

                                                            except onk JJ                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             HEADPHONES
1                                                            TUNER                UNIVERSAL
                                                              PACK                PORT
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          POWER AMPLIFIER
                                                                                                                                                                                                                                                                                                         Z3L                                                                                     MAINR
                                                                                                              L      83    L
                                                                                                                                                                                                                                                                                                         Z3R                                                                                         1                                                                                                                                                                                                                                                SPEAKER TERMINALS
                                                                                                                                                                                                                                                                                                                                                                                                     2                                                                             22       SL                                                                                FL
                                                                                                                                                                                                                                                                                                                                                                                                                                     TONE                                                                                                                                                              +29dB
                                                                                                              R      82    R                                                                                                                                                                                                                                                                                                                                                       23       SL
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              FRONT LEFT
                                             for US                                        SIRIUS_L                                                                                                                                                                                                                                                                                                                                                                                24
                                                                                                                     57    L                                                                                                                                                                                                                                                                                                     Down mix : No use
           SIRIUS                            SIRIUS                                        SIRIUS_R
                                                                                                                                                                                                                                                   R2A15220FP                                                                                                                                    MAINL
                                                                                                                                                                                                                                                                                                                                                                                                     1
                                                                                                                                                                                                                                                                                                                                                                                                                                 Tone : Use for Z3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              FR
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       +29dB
                                                                                                                     56    R
                                                                                                                                                                                                                                                                                                                                                                                                     2                                                                             20       SR
                                                                                                                                                                                                                                                                                                                                                                                                                                     TONE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    SPRLF                     FRONT RIGHT
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   19       SR
                                                                                                                     60    L                          MAINL
                 L
        AUDIO IN                                                                                                                                                                                                                                                                                                                                                                                                                                                                   18
                                                                                                                                                                                                                                                                                                                                   SL(DAC)                  43           SL(DAC)                                                                                                                                                                                              C
         (FRONT) R                                                                                                   61    R                          MAINR                                                                                                                                                                                                         43                                                                                                                                                                                                                                 +29dB
2                                                                                                                                                                                                                                                                                                                                                           91
                                                                                                                                                                                                                                                                                                                                                                    91
                                                                                                                                                                                                                                                                                                                                                                         MCH SL
                                                                                                                                                                                                                                                                                                                                                                                                                                 1
                                                                                                                                                                                                                                                                                                                                                                                                                                 2
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   16       C
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    SPRLC                     CENTER
                                                                                                                     65    L                               L
                               L                                                                                                                                           ADCL
                                                                                                                                                                                                        53
                                                                                                                                                                                                                                                                                                                                   SR(DAC)                  42         SR(DAC)
    PHONO (MM)                                                                                                                                                                                               Z3                                                                                                                                                                                                                                                                    17
                                                                                                                     64    R                               R                                                                                                                                                                                                                                                                                                                                                                                                                SL/Z3L
                               R                                                                                                                                                                        54
                                                                                                                                                                                                             708:Z2 mirror
                                                                                                                                                                                                                                                                                                                                                            90           MCH SR
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       +29dB
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              SURR
                                                                                                                                                                                                                                                                                                                                                                    90                                                                                                             15

                    L
                                             PHONO EQ                                                                67    L
                                                                                                                                                                      ADCR
                                                                                                                                                           0/-6/-12/-18dB
                                                                                                                                                                                                                                                                                                                                                                                                                                 1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              LEFT
                                                                                                                                                                                                                                                                                                                                                            39           C(DAC)                                                  2                                              Ref. GND
            TUNER                                                                                                                                                                                                                                                                                                                                                                                                                                                                  14       SW

     ( for onk JJ ) R                                                                                                66    R                                                                                                                                                                                                                                93           MCH C
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                          SR/Z3R
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       +29dB
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              SURR
                                                                                                                                                                                                                                                                                                                                                            38           SW(DAC)                                                                                                   13
                                                                                                                     69    L                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        SPRLSR
                               L




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            +
                                                                                                                                                           L
                                                                                                                                                                       SUB1L
                                                                                                                                                                                                        46
                                                                                                                                                                                                                                                                                                                                                                                                                               1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              RIGHT




                                                                                                                                                                                                                    MAIN
                                                                                                                                                                                                                                                                                                                                                                                                                             SRC
        TV/CD IN                                                                                                                                                                                                                                                                                                                                            92           MCH SW
                                                                                                                                                                                                                                                                                                                                                                                                                               2
                                                                                                                     68    R
                               R                                                                                                                           R                                            47
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   10
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        SBL/Z2L/Bi_L/LH
                                                                                                                                                                                                                                                                                                                                                            34
                                                                                                                                                                                                                                                                                                                                                                    34
                                                                                                                                                                                                                                                                                                                                                                         FL(DAC)
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   11
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        FL                                                                                                             +29dB                                                  SUR. BACK
                               L                                                                                     71    L
                                                                                                                                                                       SUB1R
                                                                                                                                                                                                                                                                                                                -6dB
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                / Bi Amp
                                                                                                                                                                                                                                                                                                                                                            95           FL(MIX)
3               PC IN
                                                                                                                                                                                                                                                                                                                                                                                                                               2                                                   12                                                                                                                                                                         LEFT
                               R                                                                                     70    R                                                                                                                                                                               inverted down mix
                                                                                                                                                                                                                                                                                                                                                            41           FL
                                                                                                                                                                                                                                                                                                                                                                                                                             SLC
                                                                                                                                                                                                                                                                                                                                                                                                                               1
                                                                                                                                                                                                                                                                                                                                                                                                                                                  priority terminal
                                                                                                                                                                                                                                                                                                                                                                    41
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        SBR/Z2R/Bi_R/RH
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   8
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       +29dB                                                  SUR. BACK
                               L                                                                                     73    L                                                                                                                                                                                                                                40           FR
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   7
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        FR
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     SPRLSB
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 / Bi Amp
        GAME IN                                                                                                                                                                                                                                                                                            inverted down mix                                                                                                                                                                                                                                                                                                                                  RIGHT
                                                                                                                                                                                                                                                                                                                                                            94           FR(MIX)
                                                                                                                     72    R
                               R                                                                                                                                                                                                                                                                                      -6dB
                                                                                                                                                                                                                                                                                                                                                                                                              Z2L         SBRC                                                     6
                                                                                                                                                                                                                



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