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                                                             TX-SR577

                                                                Ref. No. 4124
                                                                     05, 2009
                       SERVICE MANUAL


                         AV Receiver
            MODEL TX-SR577(B/S)




                                                             RC-737M
TX-SR577 Black, Silver models
 B MDC                                       120V AC, 60Hz
 B MPP, S MPP                                230V AC, 50Hz


             SAFETY-RELATED COMPONENT
             WARNING!!
             COMPONENTS IDENTIFIED BY MARK      ON THE
             SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE
             CRITICAL FOR RISK OF FIRE AND ELECTRIC SHOCK.
             REPLACE THESE COMPONENTS WITH ONKYO
             PARTS WHOSE PART NUMBERS APPEAR AS SHOWN
             IN THIS MANUAL.
             MAKE LEAKAGE-CURRENT OR RESISTANCE
             MEASUREMENTS TO DETERMINE THAT EXPOSED
             PARTS ARE ACCEPTABLY INSULATED FROM THE
             SUPPLY CIRCUIT BEFORE RETURNING THE
             APPLIANCE TO THE CUSTOMER.
                                                                                                      TX-SR507/SR577/DTR-20.1


DEBUG MODE-1
DSP DEBUG MODE-1/3
 The operations of DSP and DIR etc are able to be checked by the information displayed on FL with this debug mode.
 This information will help to analyse no sound trouble of digital audio.

 To set in Debug Mode and exit
  1. Press and hold down DISPLAY button, then press ON/STANDBY button while the unit is powered on.
     The version number of microprocessor will be displayed.

                              M:1 .04/0 9 3 2 3 a                  Version of Main Microprocessor F/W
                                                                   *Number depends on the version.
  2. Then press + (TONE) button, the version number of DSP will be displayed.

                             D:1.0 1 /09227a 6 7                   Version of DSP F/W
                                                                   *Number depends on the version.
  3. Press DISPLAY button while the DSP version is displayed. The status of DSP and DIR etc will be displayed.
                 
                             0 A 4 8 K 0 N/0 FF P o 0
  4. Press ON/STANDBY button to exit.


 Content of Display
                                                      FL Display




            1     2      3           4            5      6             7         8         9         10   11

                   1 DIR Input Lock / Unlock                   4 Sampling Frequency, Emphasis
                       E = UNLOCK                                   32K = 32 kHz without Emphasis
                         = LOCK                                     44K = 44.1 kHz without Emphasis
                                                                    48K = 48kHz without Emphasis
                   2 DIR Input RX                                   64K = 64 kHz
                       0 = None                                     88K = 88.2 kHz
                       1 = COAXIAL 1                                96K = 96 kHz
                       2 = COAXIAL 2                                176 = 176.4 kHz
                       3 = OPTICAL 1                                192 = 192 kHz
                       4 = OPTICAL 2                                32e = 32 kHz with Emphasis
                       5 = FRONT OPTICAL                            44e = 44.1 kHz with Emphasis
                       8 = HDMI 1                                   48e = 48 kHz with Emphasis
                       9 = HDMI 2
                                                               5 DIR Detect Type
                   3 DIR/ ADC Fix Mode                              0 = Analog
                       D = Digital(SPDIF)                           1 = PCM
                       A = Analog                                   2 = Not PCM
                       M = Analog Multich                           3 = Data
                       p = PCM Fixed                                4 = DTS CD (Not used)
                       d = DTS Fixed                                5 = Multichannel
                                                                    6 = Not Decided

                                                               6 CODEC Clock Mode
                                                                    N = Normal
                                                                    U = Up Sampling
                                                                    H = High Sampling (Double Rate)
                                                                    D = Down Sampling
                                                                    Q = Quad Rate
                                                                                                        TX-SR507/SR577/DTR-20.1


DEBUG MODE-2
DSP DEBUG MODE-2/3
 Content of Display (Continued)
  7 DSP Port Status                                                         10 DSP Decode
     This figure is displayed in hexadecimal form.                             o = Decode OK
     If this is transformed to binary form, each bit indicates                 x = Decode NG
     the following DSP port status. Refeo to .
        bit 0 = NIC              (Normal state)                             11 Mute output device
        bit 1 = DEC                                                            This figure is displayed in hexadecimal form.
        bit 2 = BUSY             (Abnormal state)                              If this is transformed to binary form, each bit indicates
        bit 3 = Exec Wait                                                      the IC which outputs error to microprocessor, which output
                                                                               Audio Mute. Refer to .
  8 DSP Sequence
     00 - FE = Not Free                                                     
     2D = Mute control                                                                      Transform
     FF = Free                                                                Hexadecimal               Binary

                                                                                      0   =    0   0    0   0
  9 DSP Detect Format
     P = PCM (Analog)                                                                 1   =    0   0    0   1
     D = Dolby Digital                                                                2   =    0   0    1   0
     d = DTS
     A = AAC                                                                          4   =    0   1    0   0
     S = DSD                                                                          8   =    1   0    0   0
     p = Dolby Digital+
     T = TrueHD                                                                                                  bit 0: Selector IC (Q5501)
     H = DTS-HD High Resolution                                                                                  bit 1: Effector
     M = DTS-HD Master Audio                                                                                     bit 2: DSP (Q201)
     ? = Unknown Format                                                                                          bit 3: DIR (Q301)




 Troubleshoot by DSP DEBUG MODE
  1. This debug mode will be useful in digital audio no sound or sound drop-out trouble.
  2. Check information on FL display, then identify bad parts, and replace or resolder it.
  3. Remdies Written below are of typical case. So, more detailed check may need in actual cases.
  4. Before replace ICs below, resolder the pins first to save resources.

   NOTE
   Function                                    Circuit No.      Schematic Diagram
   MPU (Main microprocessor)                   Q701             PART-5
   DSP                                         Q201             PART-13
   DIR and DAC                                 Q301             PART-5
   Flash ROM                                   Q282             PART-13
   SDRAM                                       Q281             PART-13
   Audio processor (Selector/ Volume)          Q5501            PART-3


 Digit No.
              Symptom on FL Display                         Cause of Trouble                                      Remedy
 on FL
    1        "E" is displayed                     No input signal to DIR.                      1. Find out which digital input does not work.
                                                                                               2. Confirm where the digital waveform stops
                                                                                                  between the digital input and DIR.
                                                                                               3. Resolder pins of the bad part or replace it with
                                                                                                  new one.

    4        Displayed sampling frequency         No input signal to DIR.                      The same as above.
             is different from input signal.

    9        Displayed audio format is            No input signal to DIR.                      The same as above.
             different from input signal.
                                                                                                TX-SR507/SR577/DTR-20.1


DEBUG MODE-3
DSP DEBUG MODE-3/3
 Troubleshoot by DSP DEBUG MODE (Continued)
 Digit No.
              Symptom on FL Display                      Cause of Trouble                                  Remedy
 on FL

    7        Continue to display "1"          Interface between DSP and MPU is no good. The same remedy as 10 -b.

             Continue to display "2"          Connection from DIR to DSP is no good.    The same remedy as 9 .
             Continue to display "3" to"7"    Interface between DSP and MPU is no good. The same remedy as 10 -b.

             Continue to display "8" to "F"   DSP Sequence is no good.                  Check 8 items.

    8                             03"
             Continue to display "03          Communication between DSP and MPU         1. The same remedy as 10 -b.
                                              is no good.                               2. Check the voltage of the power supply pin
                                                                                           of DSP.
                                                                                        3. Check the reset port and clock input of DSP by
                                                                                           oscilloscope, and find out bad part.
                                                                                        4. Flash ROM firmware is no good. Update.
                                                                                        5. DSP or MPU is broken. Replace MPU.
                                                                                           DSP is impossible to replace, so replace with
                                                                                           a new PC board.
                                  05"
             Continue to display "05          Writing from MPU to DSP is no good.       1. Flash ROM firmware is no good, update.
                                                                                        2. Check DSPSDO pin of MPU by oscilloscope.
                                                                                           If no signal, find out bad part connected.
                                                                                        3. Flash ROM or SDRAM is no good, replace.
                                                                                        4. DSP or MPU is broken, replace it by the same
                                                                                           method as above 5.
                                  09"
             Continue to display "09 to       DSP program does not run properly.        1. Flash ROM firmware is no good, update.
              0C"
             "0C                              Flash ROM or SDRAM is no good.            2. Flash ROM or SDRAM is broken, replace.
                                  17"
             Continue to display "17          The unit was powered off during DSP       Initialize the unit.
                                              firmware updating.                        (Press ON/STANDBY button while pushing
                                                                                        VCR/DVR button when the unit is powered on.)
                       21",
             Display "21 then return and      DSP program does not run properly.        1. Flash ROM firmware is no good, upgrade.
             signal format indicator is       Flash ROM or SDRAM is no good.            2. Flash ROM or SDRAM is broken, replace.
             flashing.

                                  22"
             Continue to display "22 to       DSP program does not run properly.        1. Flash ROM program is no good, upgrade.
              24",    30"
             "24 or "30 to "33 33".           Or audio clock to DSP is no good.         2. Flash ROM or SDRAM is broken, replace.
                                                                                        3. Check DSP drive clock freq. by oscilloscope.
                                                                                           If no signal, find out bad part connected.
                                                                                        4. Check audio clock to DSP by oscilloscope.
                                                                                           If no signal, find out bad part connected.
                                  26"
             Continue to display "26 to       DSP setting is failured.                  1. Flash ROM firmware is no good, upgrade.
              2F"
             "2F                                                                        2. Flash ROM or SDRAM is broken, replace.

    9        Displayed audio encoding         Input signal to DSP is no good.           1. Confirm where the digital waveform stops
             format is different from input                                                between DIR and DSP by oscilloscope.
              signal.                                                                   2. P8001, P8002 may relate.
                                                                                        3. Resolder pins of the bad part or replace it with
                                                                                           new one.

   10        "x" is displayed.                a. No input signal to DSP.                The same as above.
                                              b. Interface between DSP and MPU is       1. Confirm where the digital waveform stops
                                                 no good.                                  between MPU and DSP by oscilloscope.
                                                                                        2. P8001, P8002, P8003 may relate.
                                                                                        3. Resolder pins of the bad part or replace it with
                                                                                           new one.

   11        This identifies IC which outputs The IC outputs error to MPU.              Replace the IC chip.
             error to microprocessor.                                                   DSP is impossible to replace, so replace with a
                                                                                        new PC borad.
                                                                                                       TX-SR507/SR577/DTR-20.1


DEBUG MODE-4
SERVICE INFORMATION DISPLAY MODE
 This Service Information Display Mode is helpful in analyzing the final
 status when the unit goes into Protect mode and is powered off.
 Pay attention that the status will change if a button is pushed.

   1. Press and hold down DISPL Y button, then press ON/ ANDBY button while the unit is powered on.
                          DISPLAY                      ON/STANDBY
      The version of main microprocessor will be displayed.
                        
                                       M:1.0 4 /09 3 2 3 a                  Version of Main microprocessor
                                                                            The displayed number depends on version.
   2. Then press SETUP button, the following informations will be displayed.
                        
                                  - 80 F          27     30


            Power-off Cause       Temperature          Volume Level           Listening Mode
            P : Protect            xx F or xx C         yy                     zz ---> Refer to the code list below.
            - : Other

       Listening Mode Code List
          Code    Listening Mode           Code     Listening Mode                      Code Listening Mode
          01      Pure Audio               26       Neo:6 Cinema                        30       DTS-HD High Resolution
          02      Direct                   27       Neo:6 Music                         30       DTS-HD Master Audio
          03      Stereo                   28       Neural Surround                     30       DSD
          04      Mono                     40       PLII Movie THX                      39       +PLIIx Movie
          07      Mono Movie               41       PLIIx Movie THX                     3A       +PLIIx Music
          09      Orchestra                42       Neo:6 Cinema THX                    38       Dolby EX
          0A      Unplugged                43       PLII Movie THX Games                37       +Neo:6
          0B      Studio-Mix               44       Neo:6 Cinema THX Games              31       DTS Matrix
          0C      TV Logic                 29       Neural-THX                          31       DTS Discrete
          0D      All CH Stereo            30       Dolby Digital                       50       THX Cinema
          0E      Full Mono                30       DTS                                 58       THX Surround EX
          0F      PLII Movie T-D           3B       DTS96/24                            5C       THX Ultra2 Cinema
          20      PLII Movie               30       AAC                                 5D       THX Music Mode
          21      PLII Music               30       MultiCh                             5E       THX Games
          22      PLII Game                30       Dolby Digital Plus                  59       +PLIIx Movie THX
          23      PLIIx Movie              30       Dolby TrueHD                        57       +Neo:6 THX
          24      PLIIx Music                                                           3D       +Neural-THX
          25      PLIIx Game                                                            51       DTX Matrix THX
                                                                                        52       DTS Discrete THX

   3. Press SETUP button again. The following information are displayed.

                     
                                0 1 :23           10 h o u r


                        Time after Power on         Time after Initialize
                        xx : xx                     xx hour


   4. Press RETURN button. The information will be cleared.
                     
                                 P rote ctData CL R
                                                                                                                        TX-SR507/SR577/DTR-20.1


DEBUG MODE-5
HDMI DEBUG MODE-1/2

 HDMI-related operations can be checked to some extent by displaying HDMI Debug Mode.
 If a trouble of HDMI video occurs, first display this mode and try to find out the cause and remdy.


 To enter this mode
  Hold down DISPLAY button for 3 seconds. Information display will last for about 8 seconds.


 Segment No. of FL Display
                                                                            FL Display




   FL segment No. --->     0        1         2        3          4     5        7        6        8       9     10     11       12      13       14




 Input/Output State and Example of FL Display

  Video Input Format     Status Description       FL segment No. --->       0     1      2     3       4   5      6     7    8    9       10    11      12      13       14


  Normal Source                                        Description --->         Input Resolution   i/p/I/P Frame Rate                 Output Resolution        i/p/I/P
  Video Formats          Source Device Video Format : OK,   Display --->
                         Sink Device EDID : OK              (Example)
                          Normal State
                         Source Device Video Format : OK
                         Sink Device Hot plug : Low
                          Error State ---> Remedy 1
                         Source Device Video Format : OK
                         Sink Device HDCP Authentication : Fail
                          Error State ---> Remedy 2                                                                                            Blinks
                         Source Device Video Format : OK
                         Sink Device Resolution : Error
                          Error State ---> Remedy 3                                                                                                          Error mark
                         Source Device Video Format : OK
                         Sink Device EDID Reading : Error
                          Error State ---> Remedy 4                                                                                                          Error mark
                         Source Device Video Format : OK
                         Sink Device :
                         Busy(Cannot accept HDMI signal)                                                                                                  Error mark
                          Error State ---> Remedy 5
                                                       Description --->         Input Resolution   i/p/I/P Frame Rate                 Output Resolution        i/p/I/P


                                                           Progressive/ Interlace i/p/I/P
                                                             i : HDMI, Interlace
                                                             p : HDMI, Progressive
                                                             I : DVI, Interlace
                                                             P : DVI, Progressive

                                                           Frame Rate
                                                            /6 : 60 frame/sec
                                                            /5 : 50 frame/sec

                                                           Video signal input
                                                              : Analog input
                                                              : HDMI input
                                                                                                                        TX-SR507/SR577/DTR-20.1


DEBUG MODE-6
HDMI DEBUG MODE-2/2

 Input/Output State and Example of FL Display(Continued)
 Video Input Format     Status Description     FL segment No. --->     0     1      2     3        4      5       6      7      8     9       10   11      12     13   14


                                                    Description --->          Input                                  Input          i/p/I/P   Frame Rate
                                                                       Horizontal Resolution                  Vertical Resolution
 Source Video Format: Source Device PC Video Format : OK,
 PC Format            Sink Device EDID : OK
                        Normal State
                        Source Device PC Video Format : OK,
                        Sink Device Hot plug : Low
                          Error State ---> Remedy 8                                               Error
                        Source Device PC Video Format : OK,
                        Sink Device HDCP Authenification : Fail
                          Error State ---> Remedy 9                                           Blinks
                        Source Device PC Video Format : OK,
                        Sink Device EDID Reading : Error
                          Error State ---> Remedy 10                                                                                                 Error mark

                        VGA input via DVI-HDMI conversion cable
                         Normal State


                        VGA input via HDMI cable
                         Normal State


   NOTE:
   1. 1920x1080/24Hz can be displayed in Through Mode only.
   2. 640x480p/60 is displaed as "VGA" instead of itself.



 Remedy for Error State
  Remedy No.                                            Remedy
         1         The most possible cause is the hardware trouble of Sink device. Fix it.
         2         Refer to HDCP and Authentification error in "DEBUG MODE-7". Follow the procedure.
         3         Refer to Resolution error in "DEBUG MODE-7". Follow the procedure.
         4         Refer to EDID error in "DEBUG MODE-7". Follow the procedure.
         5         Check other HDMI Inputs of AV receiver. If NG, the most possible cause is the hardware trouble of Sink device. Fix it.
         8         The most possible cause is the hardware trouble of Sink device. Fix it.
         9         The same as     2   .
         10        The same as     4   .
                                                                                                                                                                                                                                    TX-SR507/SR577/DTR-20.1


DEBUG MODE-7
HDMI TROUBLESHOOT-1/3
 HDMI VIDEO SETUP TROUBLE
 1. This troubleshoot focuses on the video setup errors regarding HDMI.
 2. For reference, read TX-SR507/SR577/DTR-20.1 Owner's Manual.
 3. Analysis written below is of typical cases.
    So, more detailed check may need in actual cases because of multiple
    hardware and software causes.
 4. As for TX-SR577 and DTR-20.1, the procedure below is the same as
    TX-SR507 except model name.
                                                                                                                               Video trouble




                                                        No picture                                                                                                                                     Bad picture




                                                                            No picture
                                   "Resolution         Picture is OK                          "No HDCP          Push
                                                                            when HDCP-                                                           "No signal" is
             Display HDMI          Error" is           if player is                           support" is       DISPLAY        HDMI cable is                       Only 1080p is                                          Picture is not
                                                                            capable DVD                                                           displayed                             Bad aspect       Bad color
             DEBUG MODE            displayed           connected                              displayed         button for     NG or too long                      not displayed                                          right
                                                                            or BD disc is                                                         on FL
                                   on FL               directly to TV                         on FL             3 sec.
                                                                            played




                                  Resolution or                                             Player is not                                                                                                                 Confirm and
                                                                                                                                                                                       Set manually
              Check               aspect of TV         EDID error                           HDCP-capable        "Unknown"       Change to a                                                           Set TX-SR507's      change
                                                                           TV is not                                                                               TV does not         the aspect
              Information         and player is        between TV                           or has special      is displayed    short HDMI       Player is PC                                         x.v.Color setting   the TV setup
                                                                           HDCP-capable                                                                            support 1080p       setting of
              on FL               different from       and player                           HDCP authentic      on FL           cable                                                                  to disable (2)     to match
                                                                                                                                                                                       player
                                  each other                                                procedure                                                                                                                     the player




             Change              Change player's       Rare case for                        Change player                                       The resolution    Change                                                  Confirm and
             settings of TV,                           this model.         Use Component                                                                                                                                  change
                                 resolution or                                              or consult with     Authentic      No signal from   is not            resolution setting
             player or                                 Feedback to         Video instead                                                                                                                                  the player
                                 aspect to TV's                                             the player          error          player           supported by      of player to
             TX-SR507                                  Technical           of HDMI                                                                                                                                        setup to
                                 capability                                                 maker                                               HDMI              1080i or less
                                                       Support Devi.                                                                                                                                                      match the TV




                                                                                             Example:                          Check player's   Change            Change
                                                                                                              Use Component
                                                                                             Samsung                           setting and      PC setting to     TX-SR507's
                                                                                                              Video instead
                                                                                             DVD-HR737                         HDMI cable       HDMI supported    HDMI resolution
                                                                                                              of HDMI
                                                                                                                               connection       resolution        to Through(1)
            
            (1) Refer to Instruction Manual page 83 (English version)
                                           Resolution : Through.
            (2) Refer to Setup Menu 7-3. HDMI
                                           x.v.Color : Disable.
                                                                                                                                                                                       TX-SR507/SR577/DTR-20.1


DEBUG MODE-8
HDMI TROUBLESHOOT-2/3
 HDMI AUDIO SETUP TROUBLE
 1. This troubleshoot focuses on the audio setups and
    connections regarding HDMI.
 2. For reference, read TX-SR507/577/DTR-20.1 Owner's Manual.
 3. Analysis written below is of typical cases.
    So, more detailed check may need in actual cases
    because of multiple hardware and software causes.
 4. As for TX-SR577 and DTR-20.1, the procedure below is the
    same as TX-SR507 except model name.
                                                                               Audio trouble




                                                                No sound                                            Bad sound




                                                                                                                   Short sound
                                    The Input assigned                                           No sound on                        Sound not on      Sound drop
                                                           No digital audio                                        drop at
                                    to HDMI is not                                               specific                           AV speakers       during music
                                                           signal into HDMI                                        the beginning
                                    selected now                                                 channnel                           but on TV         playback
                                                                                                                   of music




                                                                                                                                    Check HDMI
                                                                                               No sound on         HDMI takes
                                      Change to the       Check the digital                                                          Control (CEC)                      STB is YAGI
                                                                              Check speaker    specific channels   longer time in                    TV is in
                                      input assigned      audio output                                                              setting of                          DTC10 or
                                                                              config.          according to        identifying                       Standby Mode
                                      to HDMI             setting of player                                                         TX-SR507                            compatibles
                                                                                                listening mode     audio format
                                                                                                                                     and TV




                                     Confirm again         Change the         Change all       Check the support                    Change CEC                         This STB does
                                     TX-SR507's            digital audio      speakers         tables of                            settings of      Power on TV       not comply
                                     Input Assign                             connected to     Listening mode /       Normal        TX-SR507                           with HDMI
                                                           output to HDMI                                                                            or enable iLINK
                                     1-1. HDMI                                "Yes"            Audio format                         and TV                             clock system
                                                                                               in TX-SR507
                                                                                               owner's manual




                                                                                                                                                                       Change STB or
                                                                                                                                                       Example :
                                                                                                                                                                       consult with
                                                                                                                                                       Hitachi TV
                                                                                                                                                                       STB maker
                                                                                                                                                                                                                     TX-SR507/SR577/DTR-20.1


DEBUG MODE-9
HDMI TROUBLESHOOT-3/3
 HDMI HARDWARE TROUBLE
                                                           NOTE:                                                                                            Main Device (IC)
                                                           1. This troubleshoot focuses on the HDMI hardware troubles.                                      Circuit No.    Function                   Description
                                                           2. For details, refer to TX-SR507/577/DTR-20.1 Block Diagrams
                                                                                                                                                            Q701           Main microprocessor        MPD70F3746
                                                              and Schematic Diagrams.
                                                                                                                                                            Q8501          HDMI Receiver              SiI9233ACTU
                                                           3. Analysis written below is of typical cases.
                                                                                                                                                            Q8401          HDMI Transmitter           SiI9134
                                                              So, more detailed check may need in actual cases
                                                              because of multiple hardware and software causes.
                                                           4. Before replace IC or pcb below, resolder the pins in order
                                                              to save resources.
                                                           5. As for TX-SR577 and DTR-20.1, the procedure below is
                                                              the same as TX-SR507 except model name.
                                      HDMI no picture
                                      or dropout trouble




              Check video                                    Only HDMI IN 1,                                                  HDMI IN1 to                       Up-conversion from                Display HDMI
              version                                        IN 2, IN 3 or IN 4                                               IN4 all                           analog video to HDMI              DEBUG MODE
                                                             no output                                                        no output                          is NG




                             Version is not      Latest                                              Path from                                                    This model is not
              Old version                                     Related pin of      The HDMI IN                                                                                                    Check Information
                             displayed           version                                             HDMI IN                  Q8501 is NG                         Up-conversion
                                                              Q8501 is NG         terminal is NG                                                                                                 on FL display
                                                                                                     terminal to                                                  featured
                                                                                                     Q8501 is NG


            Update to the
                              Q701 is NG
            latest version                                   Impossible to         Replace         Resolder the               Check power                                                        Refer to DEBUG
                                                             replace Q8501         the HDMI IN     pins of the parts          supply pin of                                                      MODE-5, 6
                                                                                   terminal        from HDMI IN               Q8501
                                                                                                   terminal to Q8501
                                                                                                                             OK        NG

                                                                                                                                                                                                 According to each
                             Check the                                                                                                                                                           remedy, solve the
                             power supply                     Replace                              Confirm waveform                                                                               problems
                                                              HDMI Board                           is viewable by          Impossible to      Check the power
                             pin of Q701                                                                                   replace Q8501
                                                              BAHDM-0060                           oscilloscope                               supply circuit
                                                                                                   from HDMI IN                               for Q8501
                                                                                                   terminal to Q8501


             Check +3.3V                                                                              Find out bad
                                Replace                                                                                    Replace
             power supply                                                                             part and
                                Q701                                                                                       HDMI Board
             circuit                                                                                  replace it           BAHDM-0060




            Check P-OFF pins          Check RESET pin
            #18 and #98 of Q701.      #14 of Q701.
            They must be "high"       It moves High -->
                                      Low --> High after
                                      powered on.
                                                                                                                                                                     TX-SR577
                                                                                                                                            A354
                                                                                                                                            x 8 pcs.

     EXPLODED VIEWS-1
                                                                                                                                    A350
                                                                                 U004
only       P901
                           A103        A105
                           x 7 pcs.    x 29 pcs.                                                            A069                               A360
                    A056                                                                                                  A342(Black model)
                                                                     U0021                                                A344(Silver model)
                                                                                        A017                              x 7 pcs.
          A070

                                                          P101
                                                          U010                                              U002
                                                                    U0032
                                                         A021                                  See  in                                                 A340
                                                         x 2 pcs.                              EXPLODED VIEWS-3                                        A362
                                             F6902                                                                       U0015 A042
           A101                                                                                                                x 2 pcs.
                        U005                 F6901                                                     A036     A044
                                                                                                       x 2 pcs.
                                          U001
                                      A023                                                                                 A034      See  in
                                                                                               U0014                                 EXPLODED VIEWS-2
                                                                               A054                                                                             A262
                           A025
                           x 4 pcs.                A058 A038                     U0013
                 F901
                                                        x 2 pcs.                                                                                                A264
     F901C                 U0012                                        A036
                           U0011                                        x 2 pcs.
                                                                                                       A030
                                                                             A040
      U0033                 T901                                                               A032                                                            A258
                                                                                                                                                               x 2 pcs.




                                   A001
                                                                                                 A040
                                                                                    A013         x 2 pcs.
                                                                                    x 2 pcs.                  A258
                    A003     A011                                                                             x 2 pcs.                    A260
                    x 4 pcs.                                                        A009                                                  x 3 pcs.
                                             A015                                   x 3 pcs.
                    A007




                                                                                                                                                                           TX-SR577
                    x 4 pcs.
                    A005                     A019        A256       A040
                    x 4 pcs.                                    A010                  U0034
                                                                                                                     TX-SR577



EXPLODED VIEWS-2


                                         P701

                              A225
                              x 27 pcs.



                                                              U003
                                                                                         A238
                                                                                         x 2 pcs.
                                                                      A232
                                                                      x 5 pcs.    A230
                                                                                                A236
                                                               A219


                                                                                                       A201

                                                                           A250
          U0031   A221 A215
                                             A217
                                                                                                              A330
                        A213




                                  A238
                                  x 2 pcs.    A234
                                                       A207                                    A202




                                                                                                                           TX-SR577
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        TX-SR507/SA507/SR577/HT-R670
                                   A                                        B                                                    C                                                              D                                   E                                                              F                                                                                    G                                              H                                                     I                                                                   J                                                    K
    BLOCK DIAGRAMS-1 / PART-1
    AUDIO SECTION


1                                                                                 TUNER UNIT                    Q5501            R2A15218FP                       Audio Processor (Input Selecter, Volume, Tone Control)
                                         12                 1
     UNIVERSAL PORT                                                               EXCEPT TX-SA507
                                        24                      13
             SIRIUS ANATENA                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      HEADPHONES
                                                                                                           85                                                                                                                                                                                                                                                             23       FL
                                   DD/DC ONLY
                                                                                                                                                                                                                                                                                                               TONE
                                                                                                                                                                                                                                                                                                                                                                                                                                                             POWER AMPLIFIER




                                                                                                                                  MAIN R
                                                                                                                        MAIN L




                                                                                                                                           SUB L
                                               SIRIUS
                                                                                                           86                                                                                                                                                                                                                                                             24
                                                                                                                                                                                                                                                                                                                                                                                                                         AUDIO MUTING                                                                                                                                     SPEAKER TERMINALS
                     SIRIUS                                                                                                                                                                                                     FL 94




                                                                                                                                                   SUBR
                                                                                                           82
                                                                                                                                                                                                                                                                                                                                                                                                                                                                     +29dB
                                                                                                                                                                                55
                                                                                                                                                                                                                        INVERTING
                                                                                                                                                                                                                                     43                                                                                                                                                                                                                                                                                                                                                   FRONT LEFT
                                                    MIC AMP                                                                                                                                                                                                                                                                                                               21       FR

        SETUP MIC                                                                                          81                                                                                                                                                                                                  TONE
                                                        Q7401                                                                                                                                                                   FR 93
        (FRONT IN)                                                                                                                                                              54

                                                                                                                                                                                                                                                                                                                                                                                                                                                                     +29dB
2                                                       MIC DET
                                                                                                                                                                                                                         INVERTING
                                                                                                                                                                                                                                                                                                                                                                          20

                                                                                                           73
                                                                                                                                                                                                                                     42                                                                                                                                                                                                                                                                                                                                                   FRONT RIGHT

      PORTABLE
    (STEREO MINI JACK                                                                                      72                                                                                                                  CEN 95
       FRONT INPUT)                                                                                                                                                                                                                                                                                                                                                       17       C
                                                                                                                                                                                                                                                                                                                                                                                                                                                                     +29dB

                                                                                                       L                                                                                                                             38                                                                                                                                                                                                                                                                                                                                                   CENTER
                                                                                                           78
                                   L                                                                                                                                                                                                                                                                                                                                      18                                                                          TX-SR577                                     TX-SR507/TX-SA507
                       AUX IN                                                                                                                                                                                                                                                                                                                                                                                                                         HT-R670                                      ONLY
                                                                                                                                                                                



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