Kenwood-DPCMP-727-Service-Manual(1) 电路图 维修手册.pdf

《Kenwood-DPCMP-727-Service-Manual(1) 电路图 维修手册.pdf》由会员分享，可在线阅读，更多相关《Kenwood-DPCMP-727-Service-Manual(1) 电路图 维修手册.pdf（15页珍藏版）》请在收音机爱好者资料库上搜索。

1、70% PORTABLE CD PLAYER DPC-MP727/MP922 SERVICE MANUAL 2001-3/B51-5706-00 (K/K) 3360 OPEN _ + DC INPHONES/LINE OUT REMOTE VOLUME HOLD Knob (K29-7957-04) Cover * (F07-) DC jack (E03-0342-05) Miniature phone jack (E11-0933-05) Miniature phone jack * (E11-0932-05) Variable resistor (R31-0056-05) Knob (K

2、29-7954-14) Knob (K29-7955-03) Knob (K29-7956-04) Front glass (B10-3675-03) In compliance with Federal Regulations, following are repro-duction of labels on, or inside the porduct relating to laser product safety. KENWOOD-Crop. certifies this equipment conforms to DHHS Regulations No.21 CFR 1040. 10

3、, Chapter 1, Subchapter J. DANGER : Laser radiation when open and interlock defeated. AVOID DIRECT EXPOSURE TO BEAM. SPECIFICATIONS Standards Signal reading format .Non-contact signal reading (semi-conductor laser) Characteristics Frequency characteristics .20Hz to 20kHz, 3dB Headphone output (16 ,

4、1kHz) .9mW + 9mW LINE OUT output level/impedance.MAX 0.85V/10k Power supply External DC supply.DC 4.5 to 5.1V Size AA alkaline batteries available on the open market (LR6/AA x 2 or 4).DC 3V Rechargeable batteries (NB-150 x 2).DC 2.4V Maximum external dimensions (width x height x depth) .129mm x 32mm

5、 x 138mm (5-1/16x 1-1/4 x 5-7/16) Weight (net) .260g (0.6lb) Battery life expectancy (during continual repeated playback) The standard accessories vary depending on the model of the unit. The accessories which are not standard are optionally available. For details, please consult your dealer. Note:

6、KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. BatteryWhen D.A.S.C. is offWhen D.A.S.C. is onDuring MP3/WMA file playback Size AA alkaline batteries available ApproximatelyApproximatelyApproximately on the open market

7、 (LR6/AA x 2)9 hours10 hours10 hours Size AA alkaline batteries available ApproximatelyApproximatelyApproximately on the open market (LR6/AA x 4)18 hours22 hours22 hours Rechargeable battery (NB-150 x 2)Approximately 7 hoursApproximately 8 hoursApproximately 8 hours * Refer to parts list on page 15.

8、 RadioFans.CN 收音机爱 好者资料库 DPC-MP727/MP922 2 CONTENTS / ACCESSORIES / CAUTIONS SPECIFICATIONS .Cover CONTENTS / ACCESSORIES / CAUTIONS. 2 CIRCUIT DESCRIPTION.3 TEST MODE.6 ADJUSTMENT.7 PC BOARD . 8 SCHEMATIC DIAGRAM. 10 EXPLODED VIEW .14 PARTS LIST .15 Contents Accessories Cautions Media that can be p

9、layed back with this equipment Usable media apart from audio CDs (CD-DA) Usable media: CD-ROM, CD-R, CD-RW Usable formats: ISO9660 level 1 and level 2 (excluding expanded formats) Files that can be played back: MP3 and WMA files Creating media for playing back on this equipment Compressing MP3 and W

10、MA files Please set up the transfer bit rate setting for the compression software when compressing MP3 and WMA files as follows: MP3 Files: 128kbps recommended (32kbps-320kbps) WMA Files: 128kbps recommended (64kbps-160kbps) This unit is compatible with 32kHz, 44.1kHz (recommended) and 48kHz samplin

11、g frequencies. Categorizing folders As MP3 and WMA files are compressed into high-quality sound files at an extremely high rate of compression, it is possible to record several times more tracks than audio CDs onto a single medium. It is therefore convenient to split the tracks into differ- ent fold

12、ers by genre, artist or album for retrieval and repeat play- back purposes. A maximum of 23 folders or a maximum of 200 files can be stored on a single media. There are cases where it is not possible to save folders in the desired sequence depending on the software being used. Naming files Single-by

13、te characters between A and Z, single-byte numerals between 0 and 9, and the single-byte underscore (_) can be used when naming files. A maximum of twelve characters can be displayed. Ensure that the .MP3 (MP3 files) or .WMA (WMA files) extension logs are attached to all file names. Never add the MP

14、3 or WMA extension logs to any files other than MP3 and WMA files. If the MP3 or WMA extension logs are added to any files other than MP3 and WMA files, the equipment will assume that they can be played back, and this will produce loud noises in the headphones, resulting in dam- age of adverse effec

15、ts. Hint for when naming folders and files When media containing MP3 and WMA files are played back on this equipment, the sequence in which each track is played back will be the same as the sequence in which they were saved. It is possible to set up the playback sequence by adding numbers from betwe

16、en 01 and 99 to the front of the folder and the file name when saving the file. There are cases where it is not possible to save files in the desired sequence depending on the software being used. Additional information Depending on the MP3 and WMA compression software in use, it is possible to save

17、 track titles, artist names and other informa- tion together with each sound file as additional information. Although it is possible to display pre-recorded title and artist information with this information, it is necessary to ensure that this information has been entered in single-byte alphanumeri

18、cals (Up to a maximum of 30 alphanumericals for each.). The method of entering title and artist information will differ in accordance with the compression software. Refer to the com- pression softwares instruction manual or help file. Confirming media and files Check to ascertain that MP3 and WMA fi

19、les can be played back correctly on the personal computer in use prior to saving them onto the media. Check to ensure that the saved file can be played back normally. It is not possible to confirm that files can be played back cor- rectly while they are being saved onto the media. When saving files

20、onto media Ensure that the session is closed or finalized when data has been written on media. There are cases where media on which the session has not be closed or finalized will not be played back correctly with this equipment. There are cases were the folder names and file names will not be displ

21、ayed correctly depending on the software used to save them. Do not store files or folders other than MP3 and WMA on media to be played back with this equipment. It is recommended that ten or less sessions are stored when recording MP3 and WMA files onto a medium. There are cases where playback is no

22、t possible when MP3 and WMA files (CD-ROM) and music CD information (CD-DA) are saved on the same media. Remote controller (A70-1490-05) Rechargeable batteries (W09-1267-05) Battery carrying case (W01-0984-05) Car cassette adapter (CAC-3A) (W01-0989-05) AC plug adapter (E03-0115-05) Stereo headphone

23、s (W01-0993-05) Stereo headphones (W01-1000-05) External battery case (W01-0998-05) Car battery adapter (W01-0921-05) AC adapter (W08-0658-05): E (W08-0659-05): T (W08-0660-05): X (W08-0667-15): M (W08-0682-05): K RadioFans.CN 收音机爱 好者资料库 DPC-MP727/MP922 3 CIRCUIT DESCRIPTION Port No.Port NameI/OFunc

24、tion ACTIVE HL 1P60ODSP (IC3) reset output. 2P61-Unused. 3P62ODSP (IC3) power down control.ONOFF 4P63-Unused. 512P50P57-Unused. 1316P20P23-Unused. 17VDD-+3.0v power supply. 18PB0-Unused. 19VSS-GND 20XI,PB1-Unused. 21XO-Unused. 22VDD-+3.0v power supply. 23OSCIICrystal oscillation circuit input. 24OSC

25、OOCrystal oscillation circuit output. 25MODE-Connected to VDD. 26MCLKODSP (IC15) command clock signal output. 27MDATAODSP (IC15) data signal output. 28MLDODSP (IC15) command load signal output. 29DSPRSTODSP (IC15) reset signal output. 30IPFLAGIUnused. 31,32PCON4,3-Unused. 33PCON2ORF AMP power down c

26、ontrol. 34AVDD-+3.0v analog power supply. 35PCON1OSystem power supply control.ON 36AMUTEOAudio mute control.ON 37HPMUTEOHeadphones mute control.ON 38RWSELORF gain control. 39STATIStatus signal input from DSP (IC15). 40ACDETIDetection port of AC adaptor.DETECTED 41BBSTOControl port of bass boost.OFFO

27、N 42HOLDIInput port of hold switch.OFFON 43VREF-GND 44LBATTIBattery level detection port. 45VOLUMEIInput port of volume. 46P46OCrystal oscillation circuit is stopped when in stop mode(Hi). 47P47,WDOUT-Unused. 48LEDDRV-Unused. 49ELDDRV-Unused. 50CHGORechargeable active output. Batt. charge ON : H 51L

28、CDSDOSerial data output for LCD. 52LCDRMC-Unused. 53PB5-Unused. 54VREF+-+3.0v power supply. 55,56PB6,7-Unused. 57MP3 MLDOCommand load output for MP3. 58MP3 RESETOReset output for MP3. 59DATA STOPOData signal output for MP3. 60P93-Unused. 61AVSS-GND 62,63KEY1, 2I Key signal input. 64KEYEXTIRemote con

29、trol signal input. 65RCHDETI Detection port for low rechargeable battery. Detected : more than 0.2V 66VDD-+3.0v power supply. 1. Port Description of Microprocessor RadioFans.CN 收音机爱 好者资料库 DPC-MP727/MP922 4 CIRCUIT DESCRIPTION Port No.Port NameI/OFunction ACTIVE HL 6769P70P72-Unused. 703TIRF 3Tcompen

30、sation. 71OFTRIChangeover the off track. 72P75-Unused. 73PUP1IPull up port. 74PUP2IPull up port. 75NMIIPull up port. 76BLKCKI Sub code block clock signal input. f BLKCK=75Hz(usual playback) 77DOORIDetection port of door switch. 78LIMITIDetection port of limit switch. 79WUPIReturn signal input from C

31、PU (46pin). 80HINTISignal input from DSP (IC3) to return the usual action. 81PA5-GND 82RSTIReset signal input. 83VDD-+3.0v power supply. 8491HD0HD7I/OData bus (07) input/output. 92VSS-GND 93HCNTL0OControl command output for reading and writing. 94HCNTL1OControl command output for reading and writing

32、. 95HR/WORead write signal output. 96HBILOInterface setting port. 97HCSOCS signal output. 98HASOInterface setting port. 99HDSOInterface setting port. 100HRDYOReady signal output. Port No.Port NameI/OFunction ACTIVE HL 1DVDD3V-DRAM interface power supply. 2,3D0,D1I/ODRAM data input/output signal (D0,

33、D1). 4NEWODRAM writing enable signal. 5NRASODRAM RAS control signal. 6,7D2,D3I/ODRAM data input/output signal (D2,D3). 8,9NCAS(0,1)ODRAM CAS control signal (0,1). 1019A8A3ODRAM address signal (A8A3). 20DVSS2-Digital ground. 21DVDD2-Digital power supply. 22SPOUTOSpindle motor drive signal output. 23T

34、RVMOTraverse drive positive output. 24TRVPOTraverse drive negative output. 25TRMOTracking drive positive output. 26TRPOTracking drive negative output. 27FOMOFocus drive positive output. 28FOPOFocus drive negative output. 29FBALOThe balance adjustment for the focus error. 30TBALOThe balance adjustmen

35、t for the tracking error. 31VREFIDA reference voltage input. 32FEIFocus error signal input. 33TEITracking error signal input. 34FRENVIRF envelope signal input. 35OFTIOff track signal input.Off Track 2. Port Description of DSP IC (IC15) DPC-MP727/MP922 5 CIRCUIT DESCRIPTION Port No.Port NameI/OFuncti

36、on ACTIVE HL 36NRFDETIRF detection signal input.Detected 37BDOIDrop out signal input.Drop Out 38LDON-Unused. 39ARFIRF signal input. 40IREFIReference current input. 41ADPVCCIAD reference voltage input. 42DSLFODSL loop filter output. 43DSLF2ODSL unbalance current correction. 44PLLFOPLL loop filter out

37、put. 45VCOFOJitter free VCO loop filter terminal. 46AVDD2-Analog power supply. 47AVSS2-Analog ground. 48OUTLOL ch line output. 49AVSS1-GND 50OUTROR ch line output. 51AVDD1-Analog power supply. 52FSELINoise filter ON/OFF switching input.Off On 53TMOD1-Connected to analog ground. 54TMOD2-Connected to

38、analog ground. 55FLAG-Unused. 56IPFLAGOFlag signal output. 5759EXT(02)I/OCommand change over : Expander input/output port (02). 60TX-Unused. 61MCLKIMicroprocessor command clock signal input. 62MDATAIMicroprocessor command data signal input. 63MLDIMicroprocessor command load signal input.Load 64BLKCK

39、O Sub code block clock signal output. fBLKCK=75Hz(normal playback) 65SQCKI/O Command change over : Sub code Q register external clock input. 66SUBQOCommand change over : Sub code Q data output. 67DMUTEI/OCommand change over : Muting input.Mute 68STATOStatus signal output. 69NRSTIReset signal input.R

40、eset 70SPPOLOSpindle motor drive signal output (polar output). 71PMCKO88.2kHz clock signal output. 72SMCK-Unused. 73SUBC-Unused. 74SBCK-Connected to digital power supply. 75NCLDCK-Unused. 76NTEST-Connected to digital power supply. 77X1ICrystal oscillation circuit input. f=16.9344MHz 78X2OCrystal osc

41、illation circuit output. f=16.9344MHz 79DVDD1-Digital power supply. 80DVSS1-Digital ground. DPC-MP727/MP922 6 TEST MODE 1. Test Mode 1-1 Setting Method of the Test Mode The test mode is entered when the AC adaptor is plugged in to DC IN plug while shorting the both test lands using the jumper and so

42、 on. 1-2 Starting active contents KeysDisplayOperation PLAY/PAUSE key05MODETracking servo on. ( 05 mode ) SKIP-UP key03MODE Tracking servo off. ( 03 mode ) For TE checking. Indicates the auto adjustment value. SKIP-DOWN key07 # : FG Value# : FEXP Value (07 Mode) (Whenever the key is pressed,08 # : F

43、BAL Value# : FOFS Value (08 Mode) the mode is changed.)09 # : TG Value# : TEXP Value (09 Mode) 10 # : TBAL Value# : TOFS Value (10 Mode) STOP key01TESTStop the CD operation. FF keyThe pick up travels outward in the stop mode. FB keyThe pick up travels inward in the stop mode. 1-4 Canceling the Test

44、Mode When the STOP/OFF key is pressed, the test mode is cancelled. 2. Configuration of Test Land and Adjusting Trimming Pot (VR2) TEST LAND Front Side VR2 C123 C124 C18 C11 OperationPower on FL Indication Indicates 01 test in the display. OtherThe pick up travels inward in the stop mode. 1-3 Key Operation in the Test Mode DPC-MP727/MP922 7 ADJUSTMENT Adjustment of CD player No.ITEM INPUT SETTING OUTPUT SETTING PLAYER SETTING ALIGNMEN T POINT ALIGNMENT FORFIG. 1+3.0V ADJ. Plug in an AC adaptor to DC in plug. Connect a DC voltmeter between C124(positive) and GND. PLAYBACKVR2+3.0V 0.05