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Daewoo Hc 4250 Service Manual

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    							5. Firmware Upgrade
    Preparing the Firmware Upgrade
    Activating the Firmware Upgrade
    1. Write a disc to Update file by PC Writing Program.
    2. A size of dummy folder is more than 10M bite.  (ex : font_dw, attached picture)
    3. Put Firmware file in a disc.
    1. Open the Door of DVD Receiver.
    2.  Insert the Update Disc into the Disc Tray.
    3. Close the Door, then DVD Receiver reads the disc, 
    and  Update the Firmware itself.
     HC-XX50( )/60( ) / 80( )
    - Basic : A50_8.ROM
    - DivX : A50A_16.ROM
     HC-4130( ) / 4230( )
    - Basic : A30_8.ROM
    - DivX : A30A_16.ROM
    VOLUME
    PHONES
    DISC LOADING
    9
    Starting Update.
    1. Detect the Update Disc.
    2. Display for Update Version.
     Basic Version : HC-4150 / 60 / 80, HC-4250 / 60 / 80 (A50_8.ROM)
     Basic Version : HC-4130, HC-4230  (A30_8.ROM)
     DivX Version : HC-4150 / 60 / 80 , HC-4250 / 60 / 80 (A50A_16.ROM)
     DivX Version : HC-4130 , HC-4230 (A30A_16.ROM)
    FLASHA50A_16.ROM
     
    						
    							5. Firmware Upgrade
    Read the Disc, Checksum Check and Update New Firmware.
    Completed Update.
    1. Automatically Power off(about 15 sec), than enter standby mode.
    2. Press Power Button, the System is working.
    3. Open the Door of DVD Receiver then remove the Firmware update disc.
    READING OKFLASH
    DONE
    10
    CHECKSUM OKERASE/WRITE
    Check the Update Version.
    1. Open the Door of DVD Receiver.
    2. Press Audio Button or Subtitle Button.
     Audio Button : Check for MPEG Firmware Version.
     Subtitle Button : Check for Loader Firmware Version.
     While updating, if the door opened or closed by touch, or power button is pressed, the Flash Memory
    will be damaged.
    Caution
    Firmware
    ModelFirmware
    VersionFlash
    Size
     
    						
    							6. Trouble Shooting Guide
    11
    START
    1. BASIC OPERAT ING
    Is Standby LED 
    on?
    Check Power Supply Circuit.
    Check Connection CN701.
    No
    Turn Power on.
    Is Power on?
    Ye s
    Check DVD Processor Circuit.
    IC501 Block.
    No
    Does Initial 
    read work?
    Ye s
    Check DVD Mechanism.
    Check RF Circuit IC301.
    No
    Does It Play?
    Ye s
    No
    Check DVD Region.
    Check RF Circuit IC301.
    Ye s
    Does It Ou
    tput 
    Audio?
    No
    Check Audio  Section.
    Ye s
    OK
    Audio Part
     
    						
    							12
    6. Trouble Shooting Guide
    START
    1. INITIAL OPERATING
    Is Standby
    LED on? 
    No
    Initial Operation OK.Check if IC501 
    pin 207 is high? Ye s
    Check OSC 
    waveform of 
    XC501.
    Ye s
    Check I2C Line 
    of IC504.
    Ye s
    Ye s
    Check interface 
    of VFD Dr
    iver 
    Ye sIs Power on?
    Check Connection CN701.
    Check Power Supply.
    No
    No
    No
    No
    No
    Ye s
    Replace Reset IC.
    IC508.
    Check DVD Power Supply 
    Section, PT902.
    Replace Crystal, XC501.
    Check Devices connected I2C 
    Line.
    IC201, IC401, IC408.
    Check VFD Data Interface.
    VFD_DATA/CLK.
    Replace Front PCB As
    s’y.
    Check interface 
    of SDRAM
    No
    Check CLK of SDRAM.
    Replace Flash Memory. Is Power on?
    1
    No
    Ye s
    2
    Ye s
    Front Circuit
     
    						
    							13
    6. Trouble Shooting Guide
    Check if 
    pwr_on of 
    IC208 is high?No
    Ye s
    Check I2C Line 
    of IC504.
    Ye s
    Check interface 
    of VFD Driver 
    Ye s
    No
    No Check Devices connected I2C 
    Line.
    IC201, IC401, IC408.
    Check VFD Data Interface.
    VFD_DATA/CLK.
    Replace Front PCB Ass’y.
    Check interface 
    of SDRAM
    No
    Check CLK of SDRAM.
    Replace Flash Memory.
    1
    Check if display 
    of Logo on TV?No
    Check Connection between 
    Main and Mechanism.
    Replace DVD Mechanism. Ye s
    Ye s
    2
    Check if protect 
    of IC207 is 
    high?
    Ye s
    Check Protect Sencin
    g 
      Circuit. IC206.
    No
    Front Circuit
     
    						
    							14
    6. Trouble Shooting Guide
    3. AUDIO Abnor mal
    Check if the I2S 
    output of IC501 
    is ok?
    Replace IC501.
    No
    Check if the I2S 
    input of IC201 
    is ok? Ye s
    Check Schmitt Triger IC.
    IC204, IC205.
    Check if the 
    PWM output of 
    IC201 is ok?
    Ye s
    No
    Check if the 
    PWM output of 
    Digital Amp  is 
    ok?
    Ye s
    Ye s
    Check if 
    Speaker Output 
    is ok?
    Ye s
    OK
    Audio Abnormal  of 
    DVD Function
    Check if 
    suppled powe
    r 
    is ok?
    Check Regulator Circuit.
    IC202.Ye s
    Check if EAPD 
    is high?
    No
    No
    Check PLL Circuit of IC201.
    Ye s
    No
    No
    Check Bias Voltge 3.3V of IC801 to IC804.
    Check short between Signal to GND or VCC.
    No
    Check LPF L801 to L812.
    1Video Input Function.
    2Tuner Input Function.
    3Digital Audio Input Function.
    Audio Part
     
    						
    							15
    6. Trouble Shooting Guide
    3. AUDIO Abnor mal
    Check if the I2S 
    output of IC401 
    is ok?
    No
    Ye s
    Check if the 
    TDM input of 
    IC501 is ok?
    Audio Abnormal  of 
    Video Input Function
    Check if I2C 
    between IC501 
    is ok?
    No
    Check I2C Line.
    Ye s
    Check if I2S 
    between IC406 
    is ok?
    No
    Check I2S output of IC406.
    Check Crystal XC401. Ye s
    No
    Check IC406 DAUX output.
    Check I2S Format of TDM Port.
    IC501 pin 101 to 103.
    1
    Ye s
    Audio Part
     
    						
    							16
    6. Trouble Shooting Guide
    3. AUDIO Abnor mal
    Check if the I2S 
    output of IC401 
    is ok?No
    Ye s
    Check if the 
    TDM input of 
    IC501 is ok?
    Audio Abnormal  of 
    Tuner Function
    Check if I2C 
    between IC501 
    is ok?
    No
    Check I2
    C Line.
    Ye s
    Check if I2S 
    between IC40
    6 
    is ok?
    No
    Check I2S outp
    ut of IC406.
    Check Crystal XC401. Ye s
    No
    Check IC406 DAUX output.
    Check I2S Format of TDM Port.
    IC501 pin 101 to 103.
    2
    Ye s Check if the 
    Data Interface 
    is ok?
    Check IC207 Data Interface 
    Stereo, Tuned, PLL_CE.
    No
    Check if the 
    Tuner data is 
    ok?
    Check if the 
    RDS data is 
    ok?
    No
    Ye s
    Check IC501 Data Interface 
    RDS_CLK, RDS_DATA
    No
    Ye s
    Audio Part
     
    						
    							17
    6. Trouble Shooting Guide
    3. AUDIO Abnor mal
    Check if the I2S 
    output of IC407 
    is ok?No
    Ye s
    Check if the 
    TDM input of 
    IC501 is ok?
    Audio Abnormal of Digital 
    Audio Input Function
    Ye s
    No
    Check IC406 CDTO output.
    Check I2S Format of TDM Port.
    IC501 pin
     101 to 103.
    3
    Ye sCheck if the 
    Input Select is 
    ok?
    Check IC207 Data Interface 
    DATA, CLK, 41 17_CS
    No
    Check if the 
    Data interface 
    is ok?
    No
    Ye s
    Check Crystal XC401.
    No
    Ye s
    Check if the 
    OSC waveform 
    is ok? OPTICAL INPUT & COAXIAL INPUT
    Audio Part
     
    						
    							18
    6. Trouble Shooting Guide
    4. AUDIO LINE OUTPUT Abno rmal
    Check if the 
    output of IC501 
    pin121 is ok?
    Replace IC501.
    No
    Ye s
    Check if the 
    output of IC408 
    is ok?No
    Check if the
    Signal  waveform of 
    IC410 is ok?
    Ye s
    Ye s
    Check if 
    H/P 
    Output of Jack 
    is ok?
    Ye s
    OK
    Audio Abnormal  of 
    H/P Output
    Check if I2S 
    between IC501 
    is ok?
    Check I2S Line.Ye s
    Check if VQ & 
    FILT+ is ok ?
    No
    No
    Check PLL 
    Circuit of IC408.
    Replace DAC, IC408
    Ye s
    No
    Check TR of Mute Cir cuit.
    Check Mutec Port of IC408.
    No
    Check Connection CN701.
    Audio Part
     
    						
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