Sennheiser-DRM85-mic-sm 维修电路原理图.pdf

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1、SA 070931Subject to alterationsSennheiser electronic GmbH & Co. KG 30900 WedemarkPhone: +49 (5130) 600 0 Fax: +49 (5130) 600 3001/41DRM 85DRM 85-CService manualShort descriptionThe Digital Recording Microphone is based on traditional microphone techniques in order to achieve excellent acquisition pe

2、rformance. It includes embedded recorder functionalities, that stores the digitized audio data to a 1 GByte NAND Flash Memory.The USB port can be used to download the audio data to a PC with a standard browser as well to upload configuration data from PC to the DRM. Two AA mignon alkaline batteries

3、provide about 7 hours continous power.FeaturesOmni-directional condenser capsule at DRM 85,cardioid condenser capsule at DRM 85CPre-record buffer 0 to 10 secondsDigital / Analog converterDC/DC converterRadioFans.CN 收音机爱 好者资料库DRM 85-C, DRM 852/4109/2007Safety requirementsObserve safety regulations.Ob

4、serve ESD instructions while handling electrostatically endangered components.Only skilled persons are allowed to alter and repair. For repairs and exchanges only approved components according to the current spare parts list are allowed.For safety and certification reasons it is forbidden to alter t

5、he product without authorization. Otherwise, the person who has altered the product is liable for any consequential damage.repairs/exchangesThe following instructions for overhaul and testing must be followed. In case of unusual problems please contact your Sennheiser distributor.CAUTIONDuring SMD c

6、omponent soldering you may destroy them by using a standard soldering iron for several seconds. Only use adapted soldering tools when soldering SMD components.SMDRadioFans.CN 收音机爱 好者资料库DRM 85-C, DRM 85 09/20073/41Contents1 Controls and indicators.42 Specifications.53 Description .73.1Mechanical desi

7、gn. 73.2Electrical design. 73.3Functional description. 73.4Disassembly.143.5Assembly.213.6Firmware including updates.243.7Known faults .254 Exploded view. 265 Test and alignment instructions. 285.1Measuring set-up.285.2Test table .296 Circuit diagrams. 31Block diagram.31AF board, circuit diagram.32A

8、F board, printed circuit board, component side.33AF board, printed circuit board, solder side.33Connector board, circuit diagram.34Connector board, printed circuit board, solder side.35Connector board, printed circuit board, component side.35Keyboard PCB, circuit diagram.36Keyboard PCB, printed circ

9、uit board, component side.36Keyboard PCB, printed circuit board, solder side.36Processor board, circuit diagram, part 1/3.37Processor board, circuit diagram, part 2/3.38Processor board, circuit diagram, part 3/3.39Processor board, printed circuit board, component side.40Processor board, printed circ

10、uit board, solder side.41DRM 85-C, DRM 854/4109/20071Controls and indicators?LC display?FlashMic body?Protective basket (windshield) over mic capsule?Main operating control section?REC button ?PLAY button ?MENU/STOP button M?Multi-function jogswitch control?USB connector (5 pin Mini-B)?PHONES: monit

11、or output (3.5 mm 3-pole jack socket)?Record mode LED (REC LED)?6-character alphanumeric display?Display backlight?16-segment bargraph meter - provides an indication of recording and playback level?“PLAY“ - indicates FlashMic is in replay mode?“REC“ - indicates FlashMic is in record mode?4-segment b

12、attery status indicator3214111098765121716151413Display windowDRM 85-C, DRM 8509/20075/412SpecificationsSampling frequency _48 kHz, 44.1 kHz or 32 kHz;selection with FlashMic Manager software or DRM 85 directly.Bit resolution (linear) _16 BitAudio formats _linear PCM or MPEG 1 layer 2; selection wit

13、h FlashMic Manager software or DRM 85.6 mode settingsBit rate (MPEG) _192 kbps, 160 kbps or 128 kbpsFrequency response (recorder)without capsule _20 Hz to 20 kHz 1 dB at 48 kHz FS Linear PCMwith capsule _see measured frequency responsecurves, page 11ffTHD + N _74LVC321U603123=174LVC322U603456=174LVC

14、323U6039108=174LVC324U603121311+-74LVC32U603147&74LVT081U604123&74LVT082U604456&74LVT083U6049108&74LVT084U604121311+-74LVT08U604147+3.3V100nKC635100nKC636USBOERW+3.3V3.3uNL60210nKC600*SI2302DSQ601100KJR6321.0MJR631SHDN_CTRL_BATT10KJR633+3.3VUSB_EOTSI2302DSQ604100KJR603MODE1.0MJR602HM470L603HM470L604

15、A1A2A4A3A8A6A7A5D16D17D19D18D21D20D22D23D25D24D26D27D29D28D30D31-UBatt+UBatt120406Lew1440Chassis* = not mountedC600 C606 C608 R613 Processor board, circuit diagram, part 3/3DRM 85-C, DRM 8540/4108/2007C400C404C411C601C602C603C604C605C609C611C635C636L602Q601Q604R403R405R406R410R601R602R604R605R607R60

16、8R609R631R632TP401TP402TP406TP415TP416TP417TP421TP453U401U604C401C403C516C519C620C621C622C623C624C625C626C627C628C629C630C631C632C633C634J400R409R542R558 R559R606R614R615R624R633304PT004PTTP404TP410TP414TP419TP420TP423TP424TP506Y600TP507C500C501C502C503C504C505C506C507C508C509C510C518C520R400R500R50

17、1R502R503R504R505R507R509R515R516R518R519R520R521R522R523R524R528R531R532R533R534R535R536R537R550R552R562TP405TP408TP411TP418TP422TP425TP426TP427TP500TP503TP511TP512C513C612C615C618D500D501D502D503D603D604D605D607Q603R512R513R514R525R526R529R538R541R543R544R545R546R548R551R618R619R620R621R622TP407TP

18、412TP413TP501TP502TP504TP505TP508TP509TP514TP515U502TP513TP510R530R527R517R511R510R508R506TP409TP428TP600Y500Processor board, printed circuit board, component sideDRM 85-C, DRM 85 08/200741/41M2C406C407C408C409C410C607C610D602L600L601L604M3M4M5Q602R401R402R404R407R411R547R549R557R611R612R616R617TP42

19、9TP444U400U402U403U600U603C511C512C515C613C614C616C617C619D504D505D608R540R553R554R555R603R623TP432TP434TP436TP438TP440TP441TP442TP445TP446TP447TP448TP449TP451TP452U501U503U602U601R556C402L603M1J500TP431TP435TP437TP443U500C514C517C521C522C523C524D609IF1S500TP433TP439TP450TP430Y501Processor board, printed circuit board, solder side