Service Manuals, User Guides, Schematic Diagrams or docs for : ONKYO Audio DX-7555 hfe_onkyo_dx-7555_service_en

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                                                                                              DX-7555

                                                Ref. No. 3911
                                                       122005
          SERVICE MANUAL                             / 092006




 COMPACT DISC PLAYER                               ON     STANDBY
                                                                                 OPEN/CLOSE




     MODEL DX-7555
                                                   1         2             3
                                                                                  SEARCH

                                                   4         5             6
                                                                                  MEMORY

                                                   7         8             9
                                                                                   ENTER
                                                   10       10/0           CLR




                                                 DIMMER                           DISPLAY




                                                                   ENTER


                                                 SETUP




                                                 RANDOM REPEAT




                                                 RC-625C

 Black, Silver and Golden models
    BMPP      230-240V AC, 50Hz
    SMPP      230-240V AC, 50Hz
    GMGT      220-230V AC, 50/60Hz
    GMGR      220-230V AC, 50/60Hz
    GMDT      120V AC, 60Hz
    BMDC      120V AC, 60Hz
    SMDC      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.
                                                                                                           DX-7555

SPECIFICATIONS



         Signal readout :                       Optical non-contact
         Frequency response :                   2 Hz - 20 kHz
         SN ratio :                             111 dB
         Audio dynamic range :                  100 dB
         THD (total harmonic distortion) :      0.0027%
         Audio output
            Digital optical :                   -22.5 dBm
         Audio output / Impedance
            Digital coaxial :                   0.5 Vp-p, 75 ohm
         Audio output / Impedance
            Analog :                            2.0 V (rms), 470 ohm
         Power supply :                         AC 230 - 240 V, 50 Hz
                                                AC 220 - 230 V, 50/60 Hz
                                                AC 120 V, 60 Hz
         Power consumption :                    16 W / 14 W
         Standby power consumption :            European : 0.5 W
                                                North American : 0.3 W
                                                Others : 0.4 W / 0.3 W
         Dimensions (W x H x D) :               435 x 111 x 405 mm
         Weight :                               8.0 kg
         Operation condition
            Temperature, humidity :             5 - 35   , 5 - 85 % (no condensation)
         Supported discs :                      CD, CD-R, CD-RW, MP3
                                                (Discs that have not been properly finalized may only be
                                                partially playable or not playable at all.)




         Specifications and appearance are subject to change for
         improvement without prior notice.
                                                                                                                      DX-7555

SERVICE PROCEDURE-1
PROTECTION OF EYES FROM LASER BEAM DURING SERVICING
 This set employs a laser. Therefore, be sure to follow         Laser Diode Properties
 carefully the instructions below when servicing.
                                                                Material: GaAS/GaAlAs
                                                                Wavelength: 760-800nm
                       WARNING!!                                Laser output: max. 0.5mW*
 SERVICE WARNING : DO NOT APPROACH THE                          Emission Duration: continuous
 LASER EXIT WITH THE EYE TOO CLOSELY.                           *This output is the value measured at a distance about 1.8mm
 IN CASE IT IS NECESSARY TO CONFIRM LASER                       from the objective lens surface on the Optical Pickup Block.
 BEAM EMISSION, BE SURE TO OBSERVE FROM
 A DISTANCE OF MORE THAN 30cm FROM THE
 SURFACE OF THE OBJECTIVE LENS ON THE
 OPTICAL PICKUP BLOCK.

 LASER WARNING LABEL
 The labels shown below are affixed.
  1. Warning label




                                                               DANGER:
                                                               INVISIBLE LASER RADIATION WHEN OPEN AND
                                                               INTERLOCK FAILED OR DEFEATED. AVOID DIRECT
                                                               EXPOSURE TO BEAM.

                                                               CAUTION:
                                                               HAZARDOUS LASER AND ELECTROMAGNETIC
                                                               RADIATION WHEN OPEN AND INTERLOCK DEFEATED.

                                                               ATTENTION:
                                                               RAYONNEMENT LASER ET ELECTROMAGNETIQUE
                                                               DANGEREUX SI OUVERT AVEC L'ECLENCHEMENT
                                                               DE SECURITE ANNULE.


  2. Class 1 label

                                    LUOKAN 1
         CLASS 1 LASER              LASERLAITE
         PRODUCT                    KLASS 1
                                    LASER APPARAT

          Printed on rear panel


PRECAUTIONS
  1. Ground for the work-desk.                                   3. Grounding for the human body.
     Place a conductive sheet such as a sheet of copper             Be sure to put on a wrist-strap for grounding whose
     (with impedance lower than 10 Mohm) on the work-               other end is grounded.
     desk and place the set on the conductive sheet so that         Be particularly careful when the workers wear
     the chassis can be grounded.                                   synthetic fiber clothes, or air is dry.
  2. Grounding for the test equipments and tools.                4. Select a soldering iron that permits no leakage and
     Test equipments and toolings should be grounded in             have the tip of the iron well-grounded.
     order that their ground level is the same the ground of     5. Do not check the laser diode terminals with the
     the power source.                                              probe of a circuit tester or oscilloscope.
                                                                                                                               DX-7555

SERVICE PROCEDURE-2

   1. Initialize the unit.
     (1) Press and hold down the STOP [        ] button, then press the FF (fast forward) [ ] button. All segments light up.
     (2) Press and hold down the STOP [        ] button, then press the PUSH TO ENTER (JOG) button.
              FL display
                                   0   0:00     --->      NO DISC

     (3) Press the POWER button to turn off the unit.
     (4) Disconnect the AC power cord from a wall outlet.



   2. Check the version of Main microprocessor (Q8005) and Servo microprocessor (Q1001).
     (1) Connect the AC power cord into a wall outlet.
     (2) Press the POWER button to turn on the unit.
     (3) Change into the state of "NO DISC".
     (4) Press and hold down the STOP [ ] button, then press the FF (fast forward) [         ] button twice.
         The first press lights up all segments.
           Main microprocessor version ---> Servo microprocessor version
              FL display
                             MA 050830A --->             SRV 5805A ---> MODEL00 00 --->                        NO DISC

     (5) Press the POWER button to turn off the unit.
     (6) Disconnect the AC power cord from a wall outlet.



   3. Setting position before shipment.
     (1) POWER button : OFF
     (2) PHONES LEVEL : MIN.



   4. Take out the Disc.
     If cannot take out the disc, please take out disc as follows.
     (1) The lever in the direction of the arrow.
     (2) The tray is slowly drawn out by the hand.




                                                                                --- Bottom view ---



                                                                                Lever




                                           Front panel
                                                                                                                                                                                 DX-7555


                                                                            A141
EXPLODED VIEW
                                                    A141        D                  U10                                   A026                                             A018
                     A901                                                                                                x 3 pcs.
                                                    U02                              E004
                                                                                        E006
                 A110
                 x 10 pcs.        A109
        P901
                                                                                   A     C         U01
                                                                                   B
                                                                                        A124
                                        P1002                                                                                                                             A090
                                                                                                   C       P7001      A024
                            A105                       Z008
                                                D                   P1003      A                                      x 4 pcs.
                            x 4 pcs.
                                                                                   B
               Refer to
               "EXPLODED VIEWS                                         With MECHANISM                  A012
               OF MECHANISM"                                                                           x 10 pcs.          U06
A073                 A072                                                  A028                                                     A010
                     x 3 pcs.                                                      A030                                                    A012
                                                       A090                        x 2 pcs.       A088                                     x 6 pcs.
                     U04                 A004
                                 A006                                                         U09 x 2 pcs.                                       A044
L001                   E012                                            A126
                        A141                                                                                                                         A012
                                                                                                               A090                                  x 6 pcs.
                                E011                                    U08
 T902                                                      A090      A012
                                         A090                                                                                A130                            A012                A012
               U03                                                                                                                                A052       x 2 pcs.   A090
                                                                     U05                                                  A128 A012                                              x 3 pcs.
                                                                                         U07                                                                         A020
                                                                                                                                                      A032      A040
                                                                        A076
                                                                        x 4 pcs.                                                                    A068
                                                                                                 A070
                                                                                                 x 2 pcs. A042
                                                                                                             A012
                                                                                              A060           x 2 pcs.                                    A034
  A002                                                                                        x 2 pcs.              A048
                                                                                         A058
                                                                                                                      A012
                                                                                                                      x 5 pcs.
                                                                                                                                 A036                                            A066
                                                                                        A014
                                                                                        x 4 pcs.                                           A062
                                                                                                                                    A038
                                                                                                                                                                        A108
                                                                                                                                                                 A100
                                                                                       A016                                                              A102




                                                                                                                                                                                            DX-7555
                A136             A074                               A074
                x 2 pcs.                                                               x 4 pcs.
                                 x 4 pcs.            A103           x 8 pcs.                                                                      A104
           A060                                      x 4 pcs.                                                                                     x 3 pcs.
           x 2 pcs.              A056
                                                                                                                               DX-7555

EXPLODED VIEWS OF MECHANISM-1
CD LOADER MECHA. Z001 : MGD-34
                        Parts No. 24800055C
                                                                                                          18
CD MECHA. =
                                                                                                                x2
                                                                  33
Loader mecha. : "MGD-34" + Drive unit : "KSM-213CLCM"




                        25                                                                                    18
                                                                                                              x2

                                                                                         12
                                             06
                                                                        26


                                                                                         13


                                                                         05
                                                                                                  20
                                                        16                                        x2

             18
             x2        21
                                              15                                                Z003
                                                                                  Z006          Z005 (Silver)
                                        21
                                  18                     Z007
                  09    11
                                                                                                   Z002
                                                                                                       Drive unit : KSM-213CLCM
                                                                                                       Refer to
                                       08          Z003                                                "EXPLODED VIEWS OF MECHANISM-2"
                                                    x2

                                                   Z004 x 2                                            Z003
                                                      (Gold)
                                                                                                   Z005 (Silver)
                                                                       Z006 x 2
                             30                    19                                    Z006
                                                                              20
                                                             04
                                  17                               14
                                                  03         03
                                                              02

                                                   28
                                                   07

                                       23
                                                                                                        01

                             18

                                        24

                                                  10              31
                                       32         19              x2
                                                             22
                                                                                  DX-7555

EXPLODED VIEWS OF MECHANISM-2
CD DRIVE UNIT : KSM-213CLCM
                                                 54




            53              55




                                                                         OK


     61




                                                                    51

                                                                         NG



                  52


             58                                       56




                                           57



            PARTS LIST
                   REF. NO.      PART NO. (SN)    DESCRIPTION             Q'TY

                       51        X-2625-877-1     Motor chassis ass'y         1
                       52        X2625-769-1      Motor gear ass'y            1
                       53        2626-908-01      Sled shaft                  1
                       54        24810023         Gear (A) (S)                1
                       55        7621-255-15      P2 x 3, Screw               2
                       56        24840008         Leaf switch                 1
                       57        1639-678-12      Motor PC board              1
                       58        1-564-722-11     Connector 6pin              1
                       61        8848-483-05      KSS-213C, Pickup            1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  DX-7555
                                                A                                                                                                                                                                                                   B                                                                                                                                                                                                                                                C                                                                                                                                                                                                                                                                D
    SCHEMATIC DIAGRAMS-1                                                                                                                                                                                                                                                                                                                                      U01 : MAIN CIRCUIT PC BOARD NAAR-8645
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              Q9001
                                 NOTE                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         78M05
                                                                                                                                                                                                                                                                                                                                                                                                                                                                          VSW_CPU                                                                      3             1
                              THE COMPONENTS IDENTIFIED BY MARK        ARE CRITICAL FOR SAFETY.                                                                                                                                                                                                                                                                                                                                                                                                                                                               O    I




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             C9001
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       G
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             100/16
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   C1011
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                      +
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        OP




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   2
                              REPLACE ONLY WITH PART NUMBER SPECIFIED.




                                                                                                                                                                                                                                                                                                                                                                                                                   5




                                                                                                                                                                                                                                                                                                                                                                                                                                                        GND_CPU
                              VOLTAGE (MEASURED WITH VOLTMETER)                IS DC VOLTAGE. (NO INPUT SIGNAL)




                                                                                                                                                                                                                                                                                                                                                                                                                           L1001
                              ELECTROLYTIC CAPACITORS (      ) ARE IN uF/WV.




                                                                                                                                                                                                                                                                                                                                                                                                                                   2.2u
                              ALL CAPACITORS ARE IN pF/50WV UNLESS OTHERWISE NOTED.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                               CDSVRST_1
                              EX) 030 3pF 330 33pF 331 330pF 333 0.033uF                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                        2
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       5                                                                                                                                                                                                                                                                                                        1
                              ALL RESISTORS ARE IN OHMS 1/4WATTS UNLESS OTHERWISE NOTED.                                                                                                                                                                                                                                                                                                       R1001                                                                                                                                   VDD_CPU
                                                                                                                                                                                                                                                                                                                                                                                                 NM

1                             THE THICK LINES ON PC BOARD ARE THE PRINTING SIDE OF THE PARTS.
                              EX)            PRINTING SIDE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                            R1002
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                 10K                                                          GND_CPU




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         R1007
                              CIRCUIT IS SUBJECT TO CHANGE FOR IMPROVEMENT.




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                    10K
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                               R1003                                                                        R1004
                                                                                                                                               ATTENTION




                                                                                                                                                                                                                                                                                                                                                                                                C1016




                                                                                                                                                                                                                                                                                                                                                                                                                                           C1014



                                                                                                                                                                                                                                                                                                                                                                                                                                                                       R1006
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  NC




                                                                                                                                                                                                                                                                                                                                                                                                                  10K




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   10K
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                   10K
                  CAUTION




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         60
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         59
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                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                         41
                                                                                                                                                                                                                                                                                                                                                                                                         C1015




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  R1008
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                              10K
                                                                                                                                                 AFIN D'ASSURER UNE PROTECTION




                                                                                                                                                                                                                                                                                                                                                                                                                                   C1013




                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO7
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO6
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO5
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO4
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO3
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO2
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO1
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                  GPIO0

                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     NC
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                             VDDVOLTAGE
                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                CDSVRST
                                                                  



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