Akai-DVP-4797-KDMC-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL Model: DVP4797KDMC DVD PLAYER www.akai.ru RadioFans.CN 收音机爱 好者资料库 Daewoo DA Service Manual Table of Contents General Section.2- 5 Caution/Warnings Safe Warnings Precautions Software Upgrade Circuit Diagram and Component Layout.6- 26 MPEG IC Block Diagrams Power supply Circuit Diagram

2、and Component Layout MPEG Circuit Diagram and Component Layout Front panel Circuit Diagram and Component Layout Servicing Procedures.27- 33 Power Supply Trouble Service Flow Chart Read Disc Trouble Service Flow Chart Video Trouble Service Flow Chart Composite Analogy Audio Trouble Service Flow Chart

3、 Digital Audio Trouble Service Flow Chart Front Control Trouble Service Flow Chart Remote Control Trouble Service Flow Chart Parts List. .34- 37 Power Part List MPEG Part List Front Panel Part List Karaoke Panel Part List Page 1 Page RadioFans.CN 收音机爱 好者资料库 1. General Section 1.1 Cautions/Warnings 1

4、.1.1 Product Safety Notice Parts marked with the symbol in the schematic diagram have critical char- acteristics. Use ONLY replacement pares recommended by the manufacturer. It is recommended that the unit be operated from a suitable DC supply or batter- ies during initial check out procedures. 1.1.

5、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 chas- sis to either side of the power cord i

6、s less than 240 K ohms, the unit is defec- tive. WARNING: DO NOT return the unit to the customer until the problem or loca- ted 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 WARNING

7、 HIGH VOLTAGE INSIDE TO PREVENT ELECTRICAL SHOCK DO NOT REMOVE ANY CO- VER OR SCREW. REFER ALL SERVICING TO QU- ALIFIED SERVICE PERSONNEL. DO NOT ALLOW THIS PRODUCTION BE EXPOSED TO RAIN OR MOISTURE. DISCONNECT THIS MAINS PLUG FROM THE SUPPLY SOCKET WHEN NOT IN USE. CAUTION RISK OF ELECTRIC SHOCK DO

8、 NOT OPEN Page 2 RadioFans.CN 收音机爱 好者资料库 1.2.2 Laser Caution CAUTION Adjusting the knobs, switches, and controls , ect. 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 serv ice personnel. THIS IS

9、COMPACT DISC PLAYER IS CLASSIFIED AS A CLASS LASER PRODUCT. THE LASS 1 LASER PRODUCT LABEL IS LOCATED ON THE REAR EX- TERIOR. 1.3. Precautions 1.3.1. ESD Precautions in Repairing 1.3.1.1 Do not apply excessive pressure on the mechanical parts (movi- ng pares), including the Pickup Block, as extremel

10、y high mechanical pre- cision or required in these parts. 1.3.1.2 When soldering the microprocessor and signal processing ICs, use a ceramic soldering iron or a soldering iron whose metal part is grou- nded since they are not resistant to static electricity. 1.3.1.3 When removing the solder or solde

11、ring the laser shorting lands for the Pickup Block, use a ceramic soldering iron or a soldering iron wh- ose metal part is grounded since the laser diode or not resistant to static electricity. CAUTION- INVISIBLE LASER RADIATION WHEN OPEN AND INTERLOCKS DEFEATED AVOID EXPOSURE TO BEAM. VORSICHTI- UN

12、SICHTBARE LASERSTRAHLUNG TRITT AUS. WENN DECKEL GEOFFNET UND WENN SICHERHEITSVERRIEGELUNG uBERBRuCKT IST. NICHT DEM STRAHL AUSSETZENI VARNING- OSYNLIG LASERSTRALNING NAR DENNA DEL AR OPPNAD OCH SPARR AR URKOPPLAD STRALEN AR FARLIG. ADVARSEL- USYNLIG LASERSTRALING VED ABNING NAR SIKKERHEADSAFBRYDERE

13、ER UDE AF FUNKTION. UNDGA UDSAETTELSE FOR STRALING. CLASS 1 LASER PRODUCT LUOKAN 1 LASERLAITE KLASS 1 LASERAPPARAT Page 3 1.3.2. DVD Loading Unit Precautions When handing 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

14、 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 repl- ace the Traverse Asss when the Pickup Block needed to be replace . Do not touch the lens or lens holder of the Pickup Block. 1.3.2.4 The Guide Rails of t

15、he Pickup Block are greased. Take care wh- en 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 turnable or clean. If there is dust or it is greasy,clean the p

16、art with the liquid that contains 50% each of alcohol and water. 1.3.2.7 When removing the Mechanism P.C.B. Asss, you need to sho- rt- circuit the laser diode shorting lands beforehand. 1.4. Software Upgrade You can upgrade DVD player using the software we provide as following step: The CD- R update

17、 is below lists: First, burn CDR for upgrade. Dummy files are needed minimum 20Mbytes. The burning software is Nero burning soft: 1. Volume name: WESTLAKE 2. Files name and type: ZORAN.BIN ( This file must locate Root directory) 3. CD- R burn type(formate): ISO9660 Model 1 ISO1 (level 1) dont choice

18、 Jolient dont choice loosen ISO strict Notice: WESTLAKE and DWDVDP.BIN are upper case. The CD upgrade process: After the servo read the CD- R data ,Show Message on TV : Page 4 UPGRADE FILE DETECTED UPGRADE ? PRS CHOOSE (1- 8Bit 2- 16Bit) Press 1 key , Show Message on TV UPGRADE FILE DETECTED UPGRADE

19、 ? File Copy The tray is automatic to open, take disc away. UPGRADE FILE DETECTED UPGRADE ? Upgrading At this time, please wait a few minutes, DVD is downloading code to flash, After Logo will be show on TV again, the update process finish. Notice: During upgrading , dons turn off power. Displaying

20、the software Version Number After opening the tray, press the following keys on the remote control , DISPLAY (Up) (Down) (Left) (Right) then the software version number appears. Page 5 Page 6 Page 7 Page 8 Page 9 Page 10 Page 11 Page 12 Page 13 Page 14 Page 16 Page 17 Page 18 Page 19 Page 20 Page 21

21、 Page 22 Page 23 Page 24 Page 25 Page 26 Page 27 Page 28Page 15 D5 F2 FUSE1T630- 2AL250V 2.2 Power Supply Circuit Diagram and Component Layout Fig2- 2 Power Supply Circuit Diagram Page 29 Fig2- 3 Power Supply Assembly Drawing Page 30 Fig2- 4 Power Supply Bottom Routing Page 31 Fig2- 3 Power Supply A

22、ssembly Drawing Page 32 Part Name PCS Part name CR02 LED DisplayPCS PCS ConnectorPCS Materials List Front Panel PCB A ssyModulDVD4797 Front board Part No ED- DAE02- 02 PCS R Carbon Film M aterials List M odul Part No ED - DAE02- 03 PCS PCS PCS PCS PCS PCS PCS PCS PCS M aterials List Power P CB A ssy

23、Modul Part Nam e C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 C R 0 2 M aterials List Front Panel

24、 PCB A ssyM odul 3.1. Power Supply Trouble Service Flow Chart Power Supply Block Trouble Check on D1/D2/D3/D4 Output Voltage Condition Check on U1 Pin2 Voltage Condition 13- 18V Check on D6/EC2 parts Replace U1Replace T1 Check CON1 Output Voltage Check FusE1 ConditionReplace FusE1 NG NG NG NG NG OK

25、OK OK 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

26、part that contains big number of ESD com- ponents , which require specific equipment, tools and technique to repair; In ge- neral, service technician is not suggested to disassemble the DVD loading unit. It is suggest proving the trouble and replacing the complete DVD loading unit, in- stead of repa

27、iring 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 DISCTrouble, ensure excluding the following possi- bilities: The test disc is damage. AC power supply voltage dropped below the mi

28、nimum 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 Connector Condition Replace DVD L

29、oading Unit Check the MPEG ATAPI I/F Interface Circuit Replace Connector Check the other Parts by Replacement Method OK NG NG Composite Video Trouble 3.3. Video Trouble Service Flow Chart 3.3.1. Composite Video Trouble Service Flow Chart Check SETUPItem Check L3 Output Signal Check D8 Signal Check C

30、166 Signal Check Cp1 Pin Signal Replace Cp1 See User Manual Replace L3 Parts Replace D8 Replace C166 Check External Set OK OK OK OK NG NG OK NG NG NG 5 * 1 2 m m 5 * 1 2 m m 5 * 1 2 m m 5 * 1 2 m m 6 * 1 2 m m 6 * 1 2 m m 7 8 * 1 2 m m 3.5. Digital Audio Trouble Service Flow Chart Digital Audio Trou

31、ble CheckSETUPItem Check U8 Pin170 Signal Check C155/R98 Signal Check R401 Signal Check Con3 SeeUser Manual Replace U8 Replace Replace Replace Con3Check External set OK OK OK OK OKNG NG NG NG NG 3.6. Front Control Trouble Service Flow Chart Front Control Trouble Check SW7,SW8,SW9,SW10,SW11,SW12 Replace OK NG 3.7. Remote Control Trouble Service Flow Chart Remote Control Trouble Check Remote Control Check IR1 Pin3 Voltage Check IR1 Pin1 Output Signal Check between 1CN1 and Cn10 connection Replace U2 Replace BatteryReplace Control Check Power Supply Replace IR1 Replace OK OK OK OK NGNG NG NG NG