Service Manuals, User Guides, Schematic Diagrams or docs for : Daewoo Audio DM-K42 DAEWOO+DM-K42

<< Back | Home

Most service manuals and schematics are PDF files, so You will need Adobre Acrobat Reader to view : Acrobat Download Some of the files are DjVu format. Readers and resources available here : DjVu Resources
For the compressed files, most common are zip and rar. Please, extract files with Your favorite compression software ( WinZip, WinRAR ... ) before viewing. If a document has multiple parts, You should download all, before extracting.
Good luck. Repair on Your own risk. Make sure You know what You are doing.




Image preview - the first page of the document
DAEWOO+DM-K42


>> Download DAEWOO+DM-K42 documenatation <<

Text preview - extract from the document
                                  S/M No:OSDMK42001




Model : DM-K 42




  Caution
 : In this Manual, some parts can be changed for improving, their
   performance without notice in the parts list.




                                                        Dec . 2004
                                      Daewoo DM-K42 Service Manual




Table of Contents
                                                                                               page
General Section ............................................................................    2
Cautions/Warnings
Safe Warnings
Precautions
Software Upgrade

Circuit Diagram and Component Layout .............................................                  5
MPEG IC Block Diagrams
Power supply Circuit Diagram and Component Layout
MPEG Circuit Diagram and Component Layout
Front panel Circuit Diagram and Component Layout

Servicing Procedures ......................................................................         28
Power Supply Trouble Service Flow Chart
Read Disc Trouble Service Flow Chart
Video Trouble Service Flow Chart
Composite Analogy Audio Trouble Service Flow Chart
Digital Audio Trouble Service Flow Chart
Front Control Trouble Service Flow Chart
Remote Control Trouble Service Flow Chart


Parts List ..........................................................................               36
Power parts list
MEPG parts list
Front panel parts list




                                                   Page 1
                            Daewoo DM-K42 Service Manual



1. General Section
1.1. Cautions/Warnings
       1.1.1. Product Safety Notice
      Parts marked with the symbol             in the schematic diagram have
      critical characteristics.
      Use ONLY replacement pares recommended by the manufacturer. It is
      recommended that the unit be operated from a suitable DC supply or
      batteries during initial check out procedures.




       1.1.2. Leakage Current Check/Resistance Check
           Before returning the unit to the customer, make sure you make
           either (1) a leakage current check or (2) a line to insulated
           resistance check.
           If the leakage current exceeds 0.5 milliamps, or if the resistance
           from chassis to either side of the power cord is less than 240 K
           ohms, the unit is defective.

    WARNING: DO NOT return the unit to the customer until the
    problem or located and corrected.

   1.2. Safe Warnings
       1.2.1. Protection of Eyes from Laser Beam
           To protect eyes from invisible laser beam during servicing

    DO NOT LOOK AT THE LASER BEAM



                                       Page 2
                       Daewoo DM-K42 Service Manual




   1.2.2. Laser Caution
       CAUTION

       Adjusting the knobs, switches, and controls, etc. or taking actions
       not specified herein may result in a harmful emission of laser
       beams. This CD Changer must be adjusted and repaired only by
       qualified service personnel.
       Laser symbol:




THIS IS COMPACT DISC PLAYER IS CLASSIFIED AS A CLASS 1 LASER
PRODUCT.
THE LASS 1 LASER PRODUCT LABEL IS LOCATED ON THE REAR EXTERIOR.


1.3. Precautions
    1.3.1. ESD Precautions in Repairing
        1.3.1.1. Do not apply excessive pressure on the mechanical
               parts (moving pares), including the Pickup Block, as
               extremely high mechanical precision or required in these
               parts.
        1.3.1.2. When soldering the microprocessor and signal
               processing IC's, use a ceramic soldering iron or a soldering
               iron whose metal part is grounded since they are not
               resistant to static electricity.
        1.3.1.3. When removing the solder or soldering the laser shorting
               lands for the Pickup Block, use a ceramic soldering iron or
               a soldering iron whose metal part is grounded since the

                                  Page 3
                               Daewoo DM-K42 Service Manual


                     laser diode or not resistant to static electricity.
        1.3.2. DVD Loading Unit Precautions when handling the Mechanism
               Block
            1.3.2.1. Do not loosen any screws in the Pickup Block.
            1.3.2.2. Do not adjust any screws in the Mechanism Block except
                     for "Tilt Adjust Screws", as they are adjusted precisely at
                     the factory.
            1.3.2.3. Replacement of the Pickup Block is impossible. Always
                     replace the Traverse Ass'y when the Pickup Block needed
                     to be replaced. Do not touch the lens or lens holder of the
                     Pickup Block.
            1.3.2.4. The Guide Rails of the Pickup Block are greased. Take
                     care when handing.
            1.3.2.5. When you try to slide the Pickup Block, do not press or
                     pull it directly. Always turn the dive gears with your fingers.
            1.3.2.6. Be sure that the anti-slipping rubber on the turntable or
                     clean. If there is dust or it is greasy, clean the part with the
                     liquid that contains 50% each of alcohol and water.
            1.3.2.7. When removing the Mechanism P.C.B. Ass'y, you need to
                     short-circuit the laser diode shorting lands beforehand.
1.4. Software Upgrade
You can upgrade DVD Player using the software we provide as following step:
    Creating a software upgrade CD
    Use only a new CD-R/CD-RW(not an erased one).
    Give the CD a name of your choice(e.g. version and unit name).
    Burn the unpacked documents on the CD-R/CD-RW.
    The root directory(uppermost level) of the software upgrade CD
Attention: If a failure should occur during the software upgrade (e.g. a mains failure), it
may happen that the units function and a restart of the upgrade function are no longer
possible. If this should be the case, you must replace the intergraded FLASH ICs with
preprogrammed ICs (see corresponding spare parts list).
 Insert the upgrade CD (see corresponding spare parts list) and observe the hints on
   the display and on the screen of the TV set.
 Carry out an initialization of the set.

Displaying the Software Version Number
 Press one after the other the "STOP" and "EJECT" buttons on the unit.
 Press the"OSD" with the remote control.
 Using the cursor buttons on the remote control, select the software version "MICRO
 Version" or "CUSTOMER VERSION" .The respective software version number then is
 displayed




                                          Page 4
                        Daewoo DM-K42 Service Manual




2. Circuit Diagram and Component Layout
2.1. MPEG IC Block Diagrams




                        Fig. 2-1 ZR36768/762




                                   Page 5
  Daewoo DM-K42 Service Manual




Fig. 2-2 DRC block diagram




Fig.2-3 CSTP block diagram




             Page 6
         Daewoo DM-K42 Service Manual




Fig.2-4 Vaddis ZR36768/762 block diagram




                    Page 7
Daewoo DM-K42 Service Manual




           Page 8
Daewoo DM-K42 Service Manual




           Page 9
Daewoo DM-K42 Service Manual




          Page 10
Daewoo DM-K42 Service Manual




          Page 11
Daewoo DM-K42 Service Manual




          Page 12
Daewoo DM-K42 Service Manual




          Page 13
Daewoo DM-K42 Service Manual




          Page 14
Daewoo DM-K42 Service Manual




          Page 15
Daewoo DM-K42 Service Manual




          Page 16
Daewoo DM-K42 Service Manual




          Page 17
Daewoo DM-K42 Service Manual




          Page 18
Daewoo DM-K42 Service Manual




          Page 19
                       Daewoo DM-K42 Service Manual




2.2.Power supply Circuit Diagram and Component Layout




                Fig 2-5 Power Supply Circuit Diagram



                                 Page 20
               Daewoo DM-K42 Service Manual




Fig 2-6 Power Supply Assembly Drawing




          Fig 2-7 Power Supply Composite

                         Page 21
                           Daewoo DM-K42 Service Manual




2.3. MPEG Circuit Diagram and Component Layout
 2.3.1. MPEG Circuit Diagram




                    Fig 2-8 ZR36762/ZR36768&SDRAM




                      Fig2-9 RF AMPLIFIER&DRIVER




                                     Page 22
    Daewoo DM-K42 Service Manual




Fig 2-10 AUDIO&VIDEO FILTER




      Fig 2-11 MEMORY




              Page 23
                        Daewoo DM-K42 Service Manual




                     Fig 2-12 POWER&AV PORT


2.3.3. MPEG Composite (Fig 2-14)




                                   Page 24
         Daewoo DM-K42 Service Manual




2.3.2. MPEG Assembly Drawing (Fig 2-13)



                   Page 25
                        Daewoo DM-K42 Service Manual


2.3.2. MPEG Assembly Drawing (Fig 2-13)




                                  Page 26
Daewoo DM-K42 Service Manual




          Page 27
                        Daewoo DM-K42 Service Manual


2.4. Front panel Circuit Diagram and Component Layout




                 Fig 2-16 Front Panel Circuit Diagram




               Fig 2-17 Front Panel Assembly Drawing




                   Fig 2-18 Front Panel Composite




                                  Page 28
                           Daewoo DM-K42 Service Manual



3. Servicing Procedures
   3.1. Power Supply Trouble Service Flow Chart


      Power Supply
             Block Trouble


                                    NG
       Check F901 Condition                    Replace F901

                   OK


     Check F901                    NG
         Pin4/Pin6/ Pin8                       Replace F901
         Condition

                   OK


         Check on D101/D102/
         D103/D104/D105
     Output Voltage Condition

                   NG


         Check on Q103 Pin1              NG
                                                 Replace Q103
         Voltage Condition 2~5V

                   NG
                                   NG
            Replace U302                       Replace TR901

                                                          OK
                   OK


           Check CON1~4
           Output Voltage




                                     Page 29
                            Daewoo DM-K42 Service Manual


   3.2. Read Disc Trouble Service Flow Chart
       Read disc problem in a DVD player is a very complicated issue that
       may involve complex issues. This problem is not only relation to the
       electronic circuit, but also very much relation to the operation
       environment.
       DVD loading unit is a very complicate part that contains big number of
       ESD components, which require specific equipment, tools and
       technique to repair; in general, service technician is not suggested to
       disassemble the DVD loading unit. It is suggest proving the trouble
       and replacing the complete DVD loading unit, instead of repairing the
       DVD loading unit in local workshop.
       It is suggested to prove the faulty of a DVD loading unit by
       replacement by a good DVD loading unit.
       Before checking the "NO Disc" Trouble, ensure excluding the
       following possibilities:
            The test disc is damage.
            AC power supply voltage dropped below the minimum required
       level.
            DVD disc region code and color system is not matching to the
            DVD player or system setting.
            Moisture condensed inside the unit. (Power on the unit, without
            disc loaded, for 1/2 to 2 hours).

Service Flow Chart

           Read DISC Trouble




          Check DVD LOADER                      NG
                                                           Replace Connector
           Connector Condition

                       OK


        Replace DVD Loading Unit

                       NG


          Check the MEPG ATAPI                         Check the other Parts by

          I/F Interface Circuit                        Replacement Method




                                      Page 30
                      Daewoo DM-K42 Service Manual


3.3. Video Trouble Service Flow Chart
    3.3.1. Composite Video Trouble Service Flow Chart


   Composite Video Trouble




                               NG
     Check "SETUP" Item                      See "User Manual"


                OK
                               NG
   Check Y1 Output Signal                     Replace Y1 Parts


                OK
                               NG
   Check C128/R106 Signal                     Replace C128/U1/R106


                OK
                               NG
      Check C130 Signal                        Replace C130/L9


                OK
                               OK
   Check CN8 Pin Signal                       Check External Set


                NG


       Replace CN8




                                Page 31
                      Daewoo DM-K42 Service Manual


3.3.2. S-Video Trouble Service Flow Chart


   Composite Video Trouble




                               NG
    Check "SETUP" Item                       See "User Manual"


               OK
                               NG
   Check Y1 Output Signal                     Replace Y1 Parts


               OK
                               NG
   Check C122/C125 Signal                   Replace C122/C125 or U1


               OK
                               NG            Replace C124/L7/R104
   Check C124/C127 Signal
                                               or C127/L8/R105

               OK
                                 NG
  Check CN17 Signal                       Check External Set

               OK



     Replace CN17




                                Page 32
                    Daewoo DM-K42 Service Manual


3.4. Composite Analogy Audio Trouble Service Flow Chart


   Composite Analogy Audio Trouble


                         NG
     Check R8 Signal                     Replace U1

           OK
                               NG
   Check U10 Pin1~3 Signal              Replace U1

           OK
                             NG
   Check U10 Pin7 +5V                   Check Power Supply

           OK
                              NG
   Check U10 Pin5/8 Signal              Replace U10

           OK
                               NG       Check U11 between
   Check U11 Pin2/6 Signal
                                        Pin2/6 and Pin3/5 Parts

           OK
                              NG
   Check U11 Pin4/8 +/-12V               Check Power Supply

           OK
                               NG
   Check U11 Pin1/7 Signal              Replace U11

           OK


   Check Q15/Q16 Mute Parts




                              Page 33
                          Daewoo DM-K42 Service Manual


3.5. Digital Audio Trouble Service Flow Chart


        Digital Audio Trouble




                                   NG
        Check "SETUP" Item                        See "User Manual"


                    OK
                                   NG
         Check U5 Pin9 Signal                     Replace U1


                   OK
                                   NG
         Check U5 Pin8 Signal                    ReplaceU5


                   OK
                                   NG
      CheckR130 Signal                        Check External Set


                   OK
                                   NG
      Check C147                                Replace C147

                    OK
                                 NG
           Check R132                          Replace R132/R133/C148

                    OK

         Check External Set




                                    Page 34
                          Daewoo DM-K42 Service Manual


3.6. Front Control Trouble Service Flow Chart

              Front Control Trouble


                                                              NG
       Check between JP2 and CN903 Connection

                         OK                                    Replace

       Check between JP1 and CN2 Connection
                                                         NG
                         OK
                                                   NG
           Check U2 Pin9/25Voltage                             See: 3.1


                                          Check U2            OK
                  OK                                           Replace VFD
                                   SEG Signal

                                                                   NG

                                              OK
        Check U1 Pin1/2/15/16 Voltage                         Replace U2

                       NG


                   Replace U1




                                    Page 35
                        Daewoo DM-K42 Service Manual


3.7. Remote Control Trouble Service Flow Chart


      Remote Control Trouble


                             NG                        NG
    Check Remote Control           Replace Battery          Replace Control

                  OK
                             NG
     Check U3 Pin2 Voltage         Check Power Supply

                  OK
                                   NG
    Check U3 Pin3 Output Signal              Replace U3

                  OK
                                   NG
    Check U1 Pin201 Input Signal              Replace L23

                   OK


             Replace U1




                                   Page 36
                             Daewoo DM-K42 Service Manual



4. Parts List
4.1. Power parts list
NO.        PART NO.             DESCRIPTION           QTY               LOCATION

                               Carbon Resistor
 1    M2R1130330433110   RT14-1/4W-30K



◦ Jabse Service Manual Search 2020 ◦ Jabse Pravopis ◦ Other service manual resources online : FixyaeServiceinfo