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    DVD Player                                              DVP2850/98/55/X78/79/05/F8/94/X77




                                        TABLE OF CONTENTS
                                                                                                                           Page
                                        Location of PC Boards & Versions Variation ........................ 1
                                        Specifications ....................................................................... 2
                                        Safety Instruction .................................................................. 3
                                        Software Upgrade Instruction..................................................4
                                        Troubleshooting.................................................................... 5
                                        Disassembly Instructions ..................................................... 6
                                        Set Block & Wiring Diagram ................................................. 7
                                        Circuit Diagram & PCBA Layout........................................... 8
                                        Set Mechanical Exploded View .......................................... 9
                                        Revision List ........................................................................ 10




Published by Arya & Lynn - WK1416 Subject to modification                                                                           3141 785 39216
Version 1.6
                                           1




           PCB BOARD LOCATION:

                                                                             MAIN
                                                                             BOARD
LOADER


                                                                         POWER &FRONT
                                                                         CONTROL BOARD




         VERSION VARIATIONS
                        Type / Versions                DVP2850

         Board in used   Service Policy   /55 /98 X/78 /79 /05 /F8 /94 X/77

         MAIN BOARD                       C    C   C    C   C    C   C   C

         POWER & FRONT BOARD              C    C   C    C   C    C   C   C

         LOADER                           M    M   M    M   M    M   M   M


         Tips            C -- Component Lever Repair
                         M -- Module Lever Repair
                                                2-1



 DVP2850/98:



                                                              MP3: 22.05 kHz, 24 kHz, 32 kHz,
Specifications                                                44.1 kHz 48 kHz
                                                              WMA: 44.1 kHz, 48 kHz
                                                          Constant bit rate:
       Note                                                   MP3: 8 kbps - 320 kbps
                                                              WMA: 32 kbps - 192 kbps
                                                      Main unit
                                                          Dimensions (W x H x D):
Region code                                               270 x 37.5 x 209 (mm)
This player can play discs with the following             Net Weight: 1.0 kg
region code.                                          Power
                                                          Power supply rating: 110-240V~, 50-60Hz
DVD region           Countries
                                                          Power consumption: 10W
code
                                                          Power consumption in standby mode:
                                                          < 0.5W
                                                      Accessories supplied
                                                          Remote control and one battery
                                                          Audio/Video cables
Playable media
                                                          User Manual
     DVD, DVD-Video, VCD, SVCD, Audio CD
     DVD+R/+RW, DVD-R/-RW, DVD+R/-R
                                                          Type: Semiconductor laser InGaAIP (DVD),
     DL (Dual Layer), CD-R/-RW (maximum
                                                          AIGaAs (CD)
                                                          Wave length: 658 nm (DVD), 790 nm
      USB storage device
                                                          (CD)
File format
                                                          Output Power: 7.0 mW (DVD), 10.0 mW
      Video: avi, .divx, .xvid
                                                          (VCD/CD)
      Audio: .mp3, .wma
                                                          Beam divergence: 60 degrees
USB
    Compatibility: Hi-Speed USB (2.0)
    Class support: USB Mass Storage Class
    File system: FAT16, FAT32, NTFS
    Maximum number of albums/folders: 299
    Maximum number of tracks/titles: 648
    USB port: 5V , 500mA
    Support USB HDD (Hard Disc Drive): an
    external power source may be needed
Video
    Signal system: PAL, NTSC, Multi
    Composite video output: 1 Vp-p (75 Ohm)
Audio
    2-channel analog output
         Audio Front L&R : 2 Vrms (47k Ohm)
    Digital output: 0.5 Vp-p (75 Ohm)
         Coaxial
    Sampling frequency:
                                                 2-2



 DVP2850/55/X78:



                                                               WMA: 44.1 kHz, 48 kHz
Specifications                                             Constant bit rate:
                                                               MP3: 8 kbps - 320 kbps
                                                               WMA: 32 kbps - 192 kbps
       Note                                            Main unit
                                                           Dimensions (W x H x D):
                                                           270 x 37.5 x 209 (mm)
                                                           Net Weight: 1.0 kg
Region code                                            Power
This player can play discs with the following              Power supply rating: 110-240V~, 50-60Hz
region code.                                               Power consumption: 10W
                                                           Power consumption in standby mode: <
DVD region code                  Countries
                                                           0.5W
                                 Latin America         Accessories supplied
                                                           Remote control and one battey
                                                           User manual
Playable media
                                                           Type: Semiconductor laser InGaAIP (DVD),
     DVD, DVD-Video, VCD, SVCD, Audio CD
                                                           AIGaAs (CD)
     DVD+R/+RW, DVD-R/-RW, DVD+R/-R
                                                           Wave length: 658 nm (DVD), 790 nm
     DL (Dual Layer), CD-R/-RW (maximum
                                                           (CD)
                                                           Output Power: 7.0 mW (DVD), 10.0 mW
      USB storage device
                                                           (VCD/CD)
File format
                                                           Beam divergence: 60 degrees
      Video: avi, .divx, .xvid
      Audio: .mp3, .wma

USB
    Compatibility: Hi-Speed USB (2.0)
    Class support: USB Mass Storage Class
    File system: FAT16, FAT32, NTFS
    Maximum number of albums/folders: 299
    Maximum number of tracks/titles: 648
    USB port: 5V , 500mA
    Support USB HDD (Hard Disc Drive): an
    external power source may be needed
Video
    Signal system: PAL, NTSC, Multi
    Composite video output: 1 Vp-p (75 Ohm)
Audio
    2-channel analog output
         Audio Front L&R : 2 Vrms (47k Ohm)
    Digital output: 0.5 Vp-p (75 Ohm)
         Coaxial
    Sampling frequency:
         MP3: 22.05 kHz, 24 kHz, 32 kHz, 44.1
         kHz 48 kHz
                              2-3




 DVP2850/F8:


Specifications




                                                           Eng l i sh
        Note                        Main unit



Region code                         Power



DVD region code   Countries

                                    Accessories supplied



Playable media




File format



USB




Video


Audio
                                                2-4



 DVP2850/79:



                                                              WMA: 44.1 kHz, 48 kHz
Specifications                                            Constant bit rate:
                                                              MP3: 8 kbps - 320 kbps
                                                              WMA: 32 kbps - 192 kbps
       Note                                           Main unit
                                                          Dimensions (W x H x D): 270 x 37.5 x
                                                          209 (mm)
                                                          Net Weight: 1.0 kg
This player can play discs with the following         Power
region code.                                              Power supply rating: 230-240V~, 50Hz
                                                          Power consumption: 10W
DVD region             Countries
                                                          Power consumption in standby mode: <
code
                                                          0.5W
                       Australia, New Zealand         Accessories supplied
                                                          Remote control and one battery
                                                          AV cables
                                                          User manual
Playable media
     DVD, DVD-Video, VCD, SVCD, Audio CD
                                                          Type: Semiconductor laser InGaAIP (DVD),
     DVD+R/+RW, DVD-R/-RW, DVD+R/-R
                                                          AIGaAs (CD)
     DL (Dual Layer), CD-R/-RW (maximum
                                                          Wave length: 658 nm (DVD), 790 nm
                                                          (CD)
      USB storage device
                                                          Output Power: 7.0 mW (DVD), 10.0 mW
File format
                                                          (VCD/CD)
      Video: avi, .divx, .xvid
                                                          Beam divergence: 60 degrees
      Audio: .mp3, .wma

USB
    Compatibility: Hi-Speed USB (2.0)
    Class support: USB Mass Storage Class
    File system: FAT16, FAT32, NTFS
    Maximum number of albums/folders: 299
    Maximum number of tracks/titles: 648
    USB port: 5V , 500mA
    Support USB HDD (Hard Disc Drive): an
    external power source may be needed
Video
    Signal system: PAL, NTSC, Multi
    Composite video output: 1 Vp-p (75 Ohm)
Audio
    2-channel analog output
         Audio Front L&R : 2 Vrms (47k Ohm)
    Digital output: 0.5 Vp-p (75 Ohm)
         Coaxial
    Sampling frequency:
         MP3: 22.05 kHz, 24 kHz, 32 kHz, 44.1
         kHz 48 kHz
                                                2-5



 DVP2850/05:



                                                          Constant bit rate:
Specifications                                                MP3: 8 kbps - 320 kbps
                                                              WMA: 32 kbps - 192 kbps
                                                      Main unit
       Note                                               Dimensions (W x H x D):
                                                          270 x 37.5 x 209 (mm)
                                                          Net Weight: 1.0 kg
                                                      Power
Region code                                               Power supply rating: 220-240V~, 50-60Hz
This player can play discs with the following             Power consumption: 10W
region codes.                                             Power consumption in standby mode:
                                                          < 0.5W
DVD region code                  Countries
                                                      Accessories supplied
                                 Europe                   Remote control and one battery
                                                          AV to SCART cable
                                                          User manual
Playable media
     DVD, DVD-Video, VCD, SVCD, Audio CD                  Type: Semiconductor laser InGaAIP (DVD),
     DVD+R/+RW, DVD-R/-RW, DVD+R/-R                       AIGaAs (CD)
     DL (Dual Layer), CD-R/-RW (maximum                   Wave length: 658 nm (DVD), 790 nm
                                                          (CD)
      USB storage device                                  Output Power: 7.0 mW (DVD),
File format                                               10.0 mW (VCD/CD)
      Video: avi, .divx, .xvid                            Beam divergence: 60 degrees
      Audio: .mp3, .wma

USB
    Compatibility: Hi-Speed USB (2.0)
    Class support: USB Mass Storage Class
    File system: FAT16, FAT32, NTFS
    Maximum number of albums/folders: 299
    Maximum number of tracks/titles: 648
    USB port: 5V , 500mA
    Support USB HDD (Hard Disc Drive): an
    external power source may be needed
Video
    Signal system: PAL, NTSC, Multi
    Composite video output: 1 Vp-p (75 Ohm)
Audio
    2-channel analog output
         Audio Front L&R : 2 Vrms (47k Ohm)
    Digital output: 0.5 Vp-p (75 Ohm)
         Coaxial
    Sampling frequency:
         MP3: 22.05 kHz, 24 kHz, 32 kHz, 44.1
         kHz 48 kHz
         WMA: 44.1 kHz, 48 kHz
                                                2-6



 DVP2850/94:



                                                          Constant bit rate:
Specifications                                                MP3: 8 kbps - 320 kbps
                                                              WMA: 32 kbps - 192 kbps
                                                      Main unit
       Note                                               Dimensions (W x H x D):
                                                          270 x 37.5 x 209 (mm)
                                                          Net Weight: 1.0 kg
                                                      Power
Region code                                               Power supply rating: 110-240V~, 50-60Hz
This player can play discs with the following             Power consumption: 10W
region code.                                              Power consumption in standby mode:
                                                          < 0.5W
DVD region code                  Countries
                                                      Accessories supplied
                                 India                    Remote control and one battery
                                                          AV cables
                                                          User manual
Playable media
     DVD, DVD-Video, VCD, SVCD, Audio CD                  Type: Semiconductor laser InGaAIP (DVD),
     DVD+R/+RW, DVD-R/-RW, DVD+R/-R                       AIGaAs (CD)
     DL (Dual Layer), CD-R/-RW (maximum                   Wave length: 658 nm (DVD), 790 nm
                                                          (CD)
      USB storage device                                  Output Power: 7.0 mW (DVD), 10.0 mW
File format                                               (VCD/CD)
      Video: avi, .divx, .xvid                            Beam divergence: 60 degrees
      Audio: .mp3, .wma

USB
    Compatibility: Hi-Speed USB (2.0)
    Class support: USB Mass Storage Class
    File system: FAT16, FAT32, NTFS
    Maximum number of albums/folders: 299
    Maximum number of tracks/titles: 648
    USB port: 5V , 500mA
    Support USB HDD (Hard Disc Drive): an
    external power source may be needed
Video
    Signal system: PAL, NTSC, Multi
    Composite video output: 1 Vp-p (75 Ohm)
Audio
    2-channel analog output
         Audio Front L&R : 2 Vrms (47k Ohm)
    Digital output: 0.5 Vp-p (75 Ohm)
         Coaxial
    Sampling frequency:
         MP3: 22.05 kHz, 24 kHz, 32 kHz, 44.1
         kHz 48 kHz
         WMA: 44.1 kHz, 48 kHz
               3




Solder Joint
                                                              4-1


Software upgrade

Preparation to upgrade software
1) Start the CD Burning software and create a new CD
project (Data Disc) with the following setting:                     B. Read out the software versions to confirm upgrading
 Label: DVP2XXX (No need the label name)
 File Name: DVPXXXX_XX.BIN                                          1) Power on the set and press  button on the
Power on the set and open the tray, then press              remote control.
to check the File Name.                                             2) Press  button.
                                                                    The software version and other information are display
Note: It is required capital letter for the File System             on the TV screen as follows:
name.                                                               Version       XX.XX.XX.XX (Main version)
2) Burn the data onto a blank CDR                                   SUB-VER XX.XX.XX.XX (software version of
                                                                    application software)
A. Procedure for software upgrade:                                  8032 XX.XX.XX.XX
1) Power on the set and insert the prepared Upgrade                 Servo XX.XX.XX.XX (software version of servo)
CDR.                                                                RIS XX.XX.XX.XX
2) The set will starts reading disc & response with the             DSP XX.XX.XX.XX
following display TV screen:                                        Region Code X
Upgrade File DETECTED
Upgrade?
Press Play TO START.
3) Press  button to confirm, then screen will display :
Files coping...                                                     Caution: The set must not be power off during
UPGRADING...
                                                                    upgrading, Otherwise the Main board will be
4) The upgraded tray will automatically open when files
                                                                    damaged entirely.
coping complete, then take out the disc.
5) About 1 minute later, the trace will automatically close
when upgrading complete.
                                               5-1                               Trouble shooting chart
Spindle motor does not move


                 Motor no move

                      Go


                                                 No
             Check   the    FFC   connection
                                                           Correct connection
             between 24PIN and the loader.




                      Yes



               Check whether "M5V"               No
                                                            Check the M5V power supply
               (+5V) voltage is normal.



                      Yes




           1.Whether the R12 is eroded or
           badly soldered.                            No
           2.Whether peripheral components                    Check/Replace the loader,or the bad part.
           between U1 and xp5 are eroded or
           badly soldered.



                      Yes

               Check/ Replace U1
                                             5-2                              Trouble shooting chart
The power can not be on or off


                The power can't be
                        on or off

                        Go




             Check the power supply          No
                                                   Repair the power board
             on the power board is
             normal.



                        Yes




                Check if the XS2 on                  Check/Correct
                                              No
                the front board to Yes               connection
                XP1on the decoder
                board is in good



                   Yes




             Whether the connection           No
             to K1 is     broken.                    Correct the connection




                        Yes



              Whether there is 0V and 5V      No
                                                      Replace U1.
              voltage difference on Pin 56
              of U1.


                        Yes
                                           5-3                                                    Trouble shooting chart
All output voltages on the power board is 0V or deviated.




                   All output voltages on
                   the power board is 0V or
                   deviated



                           Yes


                                                         Yes
                        Check whether
                                                                    Replace F501
                         F501 is blown



                         No



                    Check whetherthere is                      No   Replace C501&C502 if D501, D502,

                    300V on C501 or C502.                           D503, D504 are normal.




                           Yes


                   Check whether 100KHz
                                                               No      Check/ replace U501.
                   oscillating signal on
                   Pin4 of U501
                                                                       U501(PIN 4 - Drain waveform)




                           Yes



                   Check if +5V    short.                      No      Check whether U501 are eroded.




                           Yes

         Check whether the components in the
         short-circuit voltage are defected or eroded.
                                           5-4                                      Trouble shooting chart
Disc cannot be read.


             Disc cannot be read.



                      Yes



                                                No
            Check the FFC connection                 Check the loaded circuit
            between 24P and the loader.



                      Yes




           Check whether the current of   No         Replace the Loader
           R12 is Less than 60mA for
           DVD and 65mA for CD.



                      Yes



          Check whether the components    No
          between of U1 ,and xp5are                   Replace the defective parts
          eroded or defect



                Yes



           Check if there is RFO signal
                                           No
           on pin17 of XP5. (The normal
                                                      Check U1 and peripheral components
           RFO signal is a clear
           reticulated wave)



                      Yes




               Check the connection        No
                                                        Correct connection
               between U1

                      Yes




                      Replace U1
                                               5-5                                     Trouble shooting chart
Only DVD disc or only disc except DVD can be played



            Only DVD disc, or only disc
            except DVD can be Played.


                    Go



              Check     the    FFC         No         Check the loaded circuit
              connection between
              24pin and the loader.



                   Yes



            Check whether the current
            of R12 is Less than 60mA        No         Replace loader
            for DVD and 65mA for
            CD.



                    Yes



          Check whether thecomponents       No
          between U1 and xp5are eroded                   Replace the bad spare parts
          or defect



                  Yes


             Check     whether the          No
             connection of xp5 are                        Replace the bad xp5
             eroded or defect

                  Yes

                  Change U1
                                                 5-6                                     Trouble shooting chart
No display on LED, and buttons do not work


                No display on LED, and
                buttons do not work

                      Yes




                Check whether there is
                                                  No
                correct       contact
                between XS2 and XP1
                                                              Correct connection




                      Yes




                Check       VCC(M5V)             No           Fix power supply board top
                voltage on the power                          a power supply for should
                and front board                               electric circuit




                      Yes



                Check there are STB,                            Check the U1's pin 51,52,53arrive
                                                  No
                SDA and SCK signals on                          the XP1connect condition
                XS2 on the front board.
                                                      XP1 (PIN 2 CLK)        XP1(PIN4 DOUT)


                      Yes




          1.Check whether bad solder exists on
          pins of LED,
          2.Checkwhether the circuit connected                No
                                                                        Correct connection
          to K1, K2 and K3 is broken,
          3.Check whether R303, R304,R305 on
          front board are open-circuit.




                      Yes

                PressXP1 or replace LED
                                              5-7                                    Trouble shooting chart
Distorted audio and loud noise


                   Distorted audio and
                        loud noise


                    Yes



                Checkthe power supply
                voltages   +5V     to  the     No
                                                              Check Q753
                operation amplifying Q753
                is normal.



                      Yes


                  Check whether the muting      No
                  resistance R133 is normal                    ReplaceR133




                    Yes



                  Check whether the muting               No
                  resistance R132 is normal                          ReplaceR132




                      Yes


                   Checking the U927
                   leads the feet has no to         No          Correct connection
                   break to open


                     Yes

                                                         No
                   Check the voltage on
                   pin7 of U927 is OK.                                Replace R134



                      Yes



                  Check whether the U1         No
                  or U927 powersupply                         Check U927
                  normal


                      Yes

                   Replace U1 or U927
                                             5-8                                   Trouble shooting chart
Abnormal color of video picture



                Abnormal color of
                  video picture

                 Yes


             Check whether the 27MHz        No
                                                       Check X3, R79,R6 ,C26 and C27
             output signal normal.


                  Yes




            Check whether the 3.3V
                                                 No        Check other of power supply electric
            and 1.2V power supply
            voltages on the decoder                        circuit
            board are normal.




                   Yes



               Check whether the
                                                 No
               video filter network                          Correct the connection
               circuit is normal.




                    Yes


                                                  No
        Check if the video signals on Pin
                                                               change U1
        76/78/79/80 of U1 are normal
                                                        5-9                              Trouble shooting chart
Remote reception is insensitive or fails.




                      Remote reception is
                      insensitive or fails.


                           Go


                    Check if the remote                  No       Check battery
                    control works properly.




                           Yes




                   Check if the power                    No
                   supply voltage to the                          Check R96C93
                   remote censor is normal



                           Yes



             Use an oscilloscope to check if there
             is output waveform from the first pin IR           No
                                                                            REM1(PIN1 - RCwaveform)
             of    the   remote     censor      after
             pressingbutton on the remote control.



                        Yes


                     Check if there isIR                 Yes
                                                                  Change U1
                     signal on pin 54 of U1


                                                               IRwaveform


                           No



                       Correct connection
                                                                                              Trouble shooting chart
                                                     5-10
No video picture, no sound.



                      No video picture,
                         no sound.




                                                          No
                Check the cable if that is
                used to connect TV and                                 Replace the cable
                DVD Player, is normal


                       Yes


                 Check whether all the                      No
                 voltages from the power
                                                                      Check the power board
                 board to the decoder board
                 are normal.



                        Yes



             Check if the reset circuit consisting               No
             ofC65 normal (at a low level for
                                                                           Change C65,R20,U1
             tens    of    milliseconds,     then
             constantly at 3.3V).



                       Yes


                                                      No          Crystal oscillator X3 and
                    Check if there is                             peripheral components
                    27MHz       signal
                                                                  are defected or eroded.
                    output in


                      Yes


                   Check      if    the              No
                                                                  Change the bad component
                    component of vidio
                    output circuit.

                      Yes


             Check U1 and Replace U1
                                                           6-1




Mechanical and Dismantling Instructions
Dismantling Instruction                                                Detailed information please refer to the model set.

The following guidelines show how to dismantle the player.
Step1: Remove 5 screws around the Top Cover, and then remove the Top Cover (Figure 1).




                                                       Figure 1



Step2: If it is necessary to dismantle Loader or Front Panel, the Front door should be removed first. (Figure 2)
Note: Make sure to operate gently otherwise the guider would be damaged.




    Please kindly note that dismantle            the front door
    assembly carefully to avoid damage tray and the front door.              Figure 2
                                                                  6-2




Mechanical and Dismantling Instructions
Dismantling Instruction                                                   Detailed information please refer to the model set.

Step3: If the tray can't open in normal way, you can make it through the instruction as below (Figure 3).
       Note: Make sure to operate gently otherwise the guider would be damaged.




                                                                 Figure 3




Step4: Dismantling Front Panel, need release 2 snaps of Front Panel & 2 snaps of bottom cabinet , then gently pull the Panel

        out from the set. (Figure 4)




                                                                  Figure 4
                                                               6-3




Mechanical and Dismantling Instructions
Dismantling Instruction                                                   Detailed information please refer to the model set.

Step5: Dismantling Loader, disconnect the 3 connectors (XP5, XP8, XP9) aiming in the below figure, and remove 1 screw that
      connects the loader and the bottom cabinet. (Figure 5)
Step6: Dismantling Power & Front Control Board, remove 3 screws on the board. (Figure 5)
Step7: Dismantling Main Board.Remove 1 screw on the board. (Figure 5)




                                                               Figure 5
7-1                                                                                                                7-1




      Wiring and Block Diagram for DVP2850:
                                   1389W 2CH+CVBS

                                                                                 R     COAX     P1

                                                                                 L     CVBS




                                                                                 AUDIO/VIDEO
                                                                                 AMP&LPF
                                       1




           TDL-5 LODER




                                               24PIN*0.5
                                   XP5
                                                                                 1389W
                                       24
                                        1




                                               6PIN*2.0
                          SP-
                          SP+
                          HOMESW




                                   XP8
                          GND
                          SL-
                          SL+
                                           6
                                                                                       16M
                                   2                                                   FLASH
                                                                                       (1606)




                                   XP9
                         OUTSW                        2PIN*2.0
                         GND                                                       4PIN*2.0
                                   1
                                                           14PIN*2.0
                                                                   1       XP1                       14

                         MAIN BOARD




                                                                        Power_kO
                                                                         VCC_USB
                                                                          USB_DP
                                                                          USB_DM




                                                                          DATA




                                                                          +12V
                                                                           GND

                                                                           GND



                                                                           CLK
                                                                           STB
                                                                           +5V
                                                                           MIC

                                                                           GND
                                                                            IR
                                                                  14     XS301
                                                                                                     1
                                                                       14PIN*2.0                          POWER
                                                                                                          SUPPLY
                                                                       USB+LED Light
                                                                         Front panel
                       8-1                                                                                                                                                                                                                                                                                8-1
Power & Front Control Board Circuit Diagram :Power Supply
               5                                                             4                                                                                                                                3                                                                      2                                                    1




                                                                                                                                * CAUTION :
                                                                                                                           THE PARTS MARKED WITH      ARE IMPORTANT PARTS ON THE SAFETY.
                                                                                                                           PLEASE USE THE PARTS HAVING THE DESIGNATED PARTS NUMBER WITHOUT FAIL.
D                                                                                                                                                                                                                                                                                                                                               D




                                                                                                                                                                  L501
                                                                                                                                       HV:             HV1                          HV2

                                                                                                                                                                  680uH/300mA

                                                   F501                                                                                GND:            GND1            GND2
                                                 10 ohm2W                                                                                                              FB501
                                                                                                                                                                  FB80@100MHz
                                                                                               D501                D502

                             AC INPUT
                                                                                                              1N4007/1A/1000V
                              2PIN/7.92mm                                                 1N4007/1A/1000V                                              HV1                      HV2

                                            1
                                      1     2                                                  D503                D504
                                      2                                                                                                        C501                                       C502
                              CN501                                                                                                            +                                          +

                                                                            1N4007/1A/1000V                 1N4007/1A/1000V                    10uF/400V                                  15uF/400V
                                                                                                                                                                  20mH
                                                                                                                                                                  LIF503

                                                                                                                                                      GND1                      GND2
C                                                                                                                                                                                                         7                                                                                                                                     C
                                                                                                                                                                                                                   T501


                                                                                                                                                                                                          6




                                                                                                                                       1500pF/1KV
                                                                                                                                C504                       R502          R503
                                                                                                                                                           150K          150K                                                                                                                                          GND_POWER
                                                                                                                                                                                                                                                                                                                                    GND_POWER

                                                                                                                                                                                                                                                                                                                 +5V
                                                                                                                                                                                                                                                                                                                                   +5V
                                                                                                                                                      D507                                                4

                                                                                                                                                                                                                              8
                                                                                                                                                    1N4007/1A/1000V

                                                                                                                   R515
                                                                                                                                                                     D508                                                     10
                                                                                                                                                                                                                                                                        L502
                                                                                                                                                                                                                                            D509

                                                                                 NC ZD502               C509                                                        FR104/1A/400V                         2
                                                                                                                   10K
                                                                                                        +                               + C512                                                                                          SR360/3A/60V
                                                                                                                                                                                                                              11                                        6.8uH/2.4A
                                                                                                        10uF/50V                               10uF/50V                                                                                                                                  + C508
                                                                                                                                                                                                                                                              + C507
                                                                                                                                                                                                                                                                                          470uF/16V
                                                                                                                                                                                                          1                   9                                1500uF/16V
                                                                                                                                                                                                                                                                                                      R505
                                                                                                                                                                                                                                                                                                      12K/1%
                                                                                                                         R506
                                                                                                                                                                                                                                      R509
                                                4

                                                        3


                                                                 2



                                                                                 1




                                                                                                                         680                                                                                      BCK-2838
                                                Drain

                                                        NC


                                                                 BP/M



                                                                                  EN/UV




                                                                                                                         R513
                                                                                                                                                       ZD501                                                                  R508    100
                                                                                                                         100K




                                                                                                                                                                                4



                                                                                                                                                                                          1
                                                                                                                                                                                                                              1K
                                                                                                                                                       BZX79C9V1                                  U502
                                                                                            U501                                                                                                  PS2561L1
                                                S


                                                             S


                                                                        S


                                                                                  S




                                                                                          TNY176DG
                                                                                                                                                                                                                                      R510             C511




                                                                                                                                                                                3



                                                                                                                                                                                          2
B                                                                                                                                                                                                                                                                                                                                               B
                                                5


                                                            6


                                                                     7


                                                                                 8




                                                                                                                                                                                                                          3
                                                                                                                                                                                                                                        10K             0.1uF/50V/X7R
                                                                                                                                                                                                                   U503
                                                                                                                                                                                                                              1
                                                                                                                                                                                                                               H431                                                                   R507
                                                                                                                                                                                                                                                                                                      11.3K/1%




                                                                                                                                                                                                                          2
                                                                                                                                                                                          CY501



                                                                                                                                                                                          1000pF/250VAC




A                                                                                                                                                                                                                                                                                                                                               A




               5                                                             4                                                                                                                                3                                                                      2                                                    1
                        8-2                                                                                                                                                                                                      8-2
Power & Front Control Board Circuit Diagram :Front&USB&KOK Board
              5                                                                                   4             3                                                                               2                                      1




                                                                                                                          +5V




D                                                                                                                          R329 R326              R314                                                                                     D
                                                              +5V
                                    2 +5V
                                                                                                                           4.7K   4.7k            2K


                                                              GND
                                    2 GND_POWER
                                                                                                            CS                                                                                                             K1
                                                                                                            CLK
                                                                                                            Power_KO
                                                                                                                                                                                                                         POWER
                                                                                                                                                                                                          K2


                                                                                                                                                            C309     C310                               PLAYER/PAUSE
                                                1             GND                                                                                                                          K3
                                    XS2    1    2                                                                                                           0.1u     0.1u
                     14PIN/2.0mm           2    3
                                           3    4             +5V                                                                                                                       OPEN/CLOSE
                                           4    5             CS
                                           5    6             CLK
                                           6    7
                                           7    8             Power_KO
                                           8    9             IR
                                           9    10            GND
                                          10    11            USB5V
                                          11    12            FGND
                                          12    13            USB_DP                                                                                                                                       LED1
                                          13    14            USB_DM
                                          14                                                                                                                                                             standby   RED


                                                       C25                     C26                                                                                 R320
                                          5.6pF/50V/NPO/NC                     5.6pF/50V/NPO/NC                                                                                                          1.7MA

                                                                                                                                                                   2.2K/NC
                                                                                                             LED_CS:
                                                                                                                                           CS                          R319                         Q2
                                                                           A                                 H: Standby                                                                             BT3904

C                                                                                                            L: ON                                                   4.7K              R325
                                                                                                                                                                                                                                           C
                                                                                                                                                   C305                                2.2K
                                                                                                                                                   0.1uF/16V/Y5V




                                                                                                                                         USB
                                                                                                                                                         USB5V
                                                                                                                                                         USB_DM
                                                                                                                                                              USB_DP

                                                                                                                                                                                                         C202
                                                                                                                                                                                                         0.1uF/50V/Y5V
                                                                                                      +5V
                           REM1
                                                                                                                                                                   ESD2             ESD1
                                          3                                          R318   470
                                   VCC    2
                                   GND    1              IR                                                                                                 LVE16Y1R0              LVE16Y1R0
                                     IR                             C306


B                          IR1                     C315
                                               47pF/50V/NP0
                                                               1uF/50V/Y5V
                                                                                                                                                                                                                                           B
                                                                                                                                                                                                    A
                                                                                                                                                              R1            0/NC
                                                                                                                                           FGND                                      GND_POWER




A                                                                                                                                                                                                                                          A




              5                                                                                   4             3                                                                               2                                      1
                      8-3                                                                                                                                                                                                                                                                                                                        8-3
Main Board Circuit Diagram:Power
               5                                           

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