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Portable Disc Player

Service Manual

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Summary of Contents for DM-301P

Page 1: ...Portable Disc Player Service Manual ...

Page 2: ...2 Model No DM 301P Version 1 0 MODEL DM 301P ...

Page 3: ...3 Model No DM 301P Version 1 0 CONTENTS MAIN BOARD CIRCUIT DIAGRAM FUNCTION EXPLANATION 4 TROUBLE SHOOTING 5 EASY DAMAGED COMPONENT BADNESS PHENOMENON LIST 8 CIRCUIT DIAGRAM 9 ...

Page 4: ...550N Signal Amplifier DSP SONY CXD3068Q Digital Signal Processor MPEG SPCA716A MPEG 1 Decoder 4 DC TO DC ROAM D5901 Mechanism power driver Power Circuit Power 5 VIDEO SPCA717A Video processor AUDIO WM8714 DF2308 Audio processor A D Transfer Amplify SDRAM SDRAM4 16M 80 Dynamic Storage 8 ROOM 2M FLASH Storage VIDEO OUT AUDIO OUT ...

Page 5: ... damaged bad touching between 2 pin and 3 pin Judgment bad connection between cathode of battery chip and power 3 Capacitance on main board 30 C35 1UF 0603 is bad or its capacity is low 4 Amplifier multiple of main board Q3 S8050D is less than 200 Batteries can t play CD Correction process Check battery chip Clean the smutch or change battery chip Check power socket Change power socket Check the c...

Page 6: ...t possible component is Q6 S8050D 3 ROM SST39VF020 040 IC is in bad connection or losing data 4 PLAY button is in bad connection No display when switch on the player Correction process Check power socket Change the socket Check Q6 Change Q6 Check ROM Reinstall or change ROM Check the panel Clean the touching point OK 1 Please ask the technician for help 2 Please send back 2 3pcs defective sample f...

Page 7: ...se clean smutch 2 Bad Button Housing Please chance button housing 3 Bad Control Board Please ask Engineer to repair it Show No Disk when reading disc Cause analysis and Correction method 1 Improper Disc Serious Scratched disk or the format of Disc is out of MPEG 1Standard 2 There are dusts on Pick up lens please clean the lens with professional cleaning disc Check if the screw is loosing Fix it fi...

Page 8: ... Bettery chip No power Power socket No power Q6 C4115S Weak power can t start the unit or no 3 3V power voltage HOLD switch Malfunction Open switch Show OPEN or power off when turn on the unit Touching between ROOM 2M FLASH and socket No feekback when turn on the unit Earphone socket No sound or single sound or interrupted sound Connecting housing of control board No feednack or no display when tu...

Page 9: ...9 Model No DM 301P Version 1 0 CIRCUIT DIAGRAM ...

Page 10: ...10 Model No DM 301P Version 1 0 ...

Page 11: ...11 Model No DM 301P Version 1 0 ...

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