Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio TX-SR608 onkyo_tx-sr608-b-s-g_rev-5_sm_[ET]

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                                                          TX-SR608

                                                    Ref. No. 4197
                                                          042010
              SERVICE MANUAL


              AV RECIEVER
MODEL TX-SR608 (B)/(S)/(G)




                                                      RC-765M


    Black, Silver and Golden models
 BMDD,BMDC                     120V AC, 60Hz
 BMMP,SMMP,BMMB                230V AC, 50Hz
 BMMO,BMMQ,BMMA            220-240V, AC 50/60Hz
 GMMR,BMMR
 BMDF                      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.
                                                                                                      TX-SR608

SERVICE PROCEDURE
 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.
      
       : North American model           : Hong Kong model
       : Australian model               : European model
       : Canadian model                 : Britain model
       : Saudi Arabia model             : China model
       : Taiwan model
        REF No. PART NAME DESCRIPTION                PART N O.        REMARKS
         F6901    FUSE       12A-TUL-250V          252301GR
         F6902    FUSE       12A-TUL-250V          252301GR
         F901     FUSE       5A-SE-EAK    FUSE      252078GR          
         F901or   FUSE       5A-SE-TL250V          252278GR           
         F901     FUSE       10A-UL/T-233           252330GR          
         F901or   FUSE       10A-T/UL-ST2           252333GR          


 2. To initialize the unit
   1. Press and hold down VCR/DVR button, then press ON/STANDBY button when the unit is powered on.
   2. After Cl ea r " is displayed, the preset memory and each mode stored in the memory are initialized and will
             "
       return to the factory settings, and turn to Standby mode.
   3. Remove the AC cord from power line.

 3. 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.

 4. 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.
                                                                    TX-SR308/ /508/ 578/ 608 HT-R280/ 380/ 538/ 580/ 680/ 980/ C230/ C260 DTR-20.2/ 30.2



TROUBLE SHOOT-1                       This is just for general reference and does not including every single case.
No Power


           No Power
                                                                           BAETC-0376/0390
                                                                                   (Power supply)
                                                                           BADG-0364 (MPU Board)                       BADG-0364 (MPU Board)
   BAETC-0376/0390 (Power supply)                          YES                                                NO




                                                                                                                                                       TX-SR308/ /508/ 578/ 608 HT-R280/ 380/ 538/ 580/ 680/ 980/ C230/ C260 DTR-20.2/ 30.2
                                                                           After Power on,                             Replace Q701 and also
   BADG-0364 (MPU Board)                                                   Voltage atJL901_1pin is changed             repairits peripheral circuit.
   JL901 4pin +12V                                                         from +12V t o 0V?
         2pin +10V

                         NO                                                                   YES

   BAETC-0376/0390 (Power supply)                                             BAETC-0376/0390
   Replace Power Supply Board orRepair                                                (Power Supply)
   Sub Transformer T902 and itsperipheral                                           F901 is blown out?
   circuit.
                                                  YES                                         NO

   After replacing F901 on                                                   BADG-0346 (MPU Board)
                                                           NO                After Power on, Voltage at      YES
   BAETC-0376/0390 (Power supply)
                                                                             P2001 22/21pin +5V
   either of F901 on Power supply Board         Replacing F901 will not
                                                                                   17/18pin +12V
                                                improve the unit.
   or F6901/F6902 on BAAF-0341(AF
   Board) blows out?
                                                                                               NO
                        YES
                                                                          BAETC-0359/0352/0345/                         BAVD-0375/0389
         BAAF-0355(AF Board)                                              (trans teminal Board)                          (Video board)
                                                                           After Power on, Voltage at
                                                                                                             YES
                                                                                                                     Replace Video Board or
   Replace "AF Board".                                                     JL952 AC10V                               Repair D901/Q9023/Q9031
   or "D6901 (Power supply diode)"                                                                                   and their peripheral circuit.
   "Power AMP(Final_TR and A_Class AMP) "
                                                                                              NO
   and also repair their peripheral circuit.
                                                                            Replace Power
                                                                            Transformer or
                                                                            Repair its peripheral circuit.
                                                                                                                                    TX-SR308/ /508/ 578/ 608 HT-R280/ 380/ 538/ 580/ 680/ 980/ C230/ C260 DTR-20.2/ 30.2
           A                                  B                               C                              D                                  E                                 F                           G         H
    TROUBLE SHOOT- 2                                    This is just for general reference and does not include every single case.
                                                        The above waveforms are got by Oscilloscope of Maximum Horizontal Sensitivity: 100MHz.
    No Display                                          The results depend on the oscilloscope.


1                    No Display



               Fluorescent Display Tube
                                              NO    BAPS-0342/0349/0356(-VP Board)                   BAPS-0342/0349/0356 (-VP Board)                 BADIS-0373/ 0387
               is not working?                      JL953 between 2pin-4pin: AC3.3V                      JL953 3pin -33V                             (Display Board)
                                                                                        YES                                                    YES   P701                                     BADIS-0373/ 0387
                                                                                                               1pin and 5pin +3.3V
                                                                                                                                                     26pin FLD_SDD                             (Display Board)
                     YES
                                                          NO                                                     NO                                  27pin FLD_CLK                    YES   Replace Display Board
                                                                                                                                                     28pin FLD_CS                           or repair Q7003 and
           Replace Fluorescent                          BAPS-0342/0349/0356
           Display Tube or                                                                            BAPS-0342/0349/0356(-VP Board)                 Transmission of each                   their peripheral circuit.
                                                                       (-VP Board)
           BADIS-0373/0387(Display                      JL951 1pin-2pin AC3.3V                           JL951 3pin-4pin AC40V                       of the signals is correct?
2          Board).                                                                            NO
                                                          YES                                                                                                  NO
                                                                                                                  NO
           BAPS-0342/0349/0356                          BAPS-0342/0349/0356
                                                   NO
                           (-VP Board)                                  (-VP Board)      Replace Power transformeror                                 BADG-0413(MPU Board)
           Replace -VP Board or                         R950(8.2 ) is disconnected?      Repair its peripheral circuit.
           Check for signal line                                                                                                 YES                 Replace MPU Board.
           damage etc. and fix any                                                                                                                   or Repair Q701 and
                                                          YES                                                                                        their peripheral circuit.
           damages.

                                                    BAPS-0342/0349/0356 (-VP Board)                     BAPS-0342/0349/0356 (-VP Board)
                                                    Replace R950 (8.2 ) or -VP Board                    Replace -VP Board or Repair
3
                                                                                                        Q960/D960/D962/R961 and
                                                                                                                   their peripheral circuit.




                                                                                                                            FLD_CLK                  FLD_SDD(DATA) FLD_CS


                                                                                                              V:1V/cm
                                                                                                              H:02Msec/cm
4
                  Timing of Serial Communication

                                                                                                              V:1V/cm
                                                                                                              H:10



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