Akai-DPS-24-Service-Manual(1) 电路图 维修手册.pdf

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1、SERVICE MANUAL 1 DIGITAL PERSONAL STUDIO PRE PRE PRE PRE EQ ONQ-CHANNEL A B LINE MIC SIGNAL / CLIP +600 !SOLO! MAXMIN LINE MICLINE MICLINE MICLINE MICLINE MICLINE MICLINE MICLINE MICLINE MICLINE MICLINE MIC A BA BA BA BA BA BA BA BA BA BA B +600+600+600+600+600+600+600+600+600+600+600 SIGNAL / CLIPS

2、IGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIPSIGNAL / CLIP +45-15+45-15+45-15+45-15+45-15+45-15+45-15+45-15+45-15+45-15 TRIM A / B 48V LINE /MIC ONOFF ASSIGN RECORD /EDIT SELECT 234567891011121 123456789101112 123456789101112 131

3、415161718192021222324 L / R1 / 23 / 45 / 67 / 8FX / AUX 1FX / AUX 2FX / AUX 3FX / AUX 4 Q-STRIP FUNCTION PAN MONITOR LEVEL 2-TRACK MONO NEAR +45-15+45-15 34 78 812 456 4567 8123 23 567 1 TALK BACK SELECT STUDIO CR GROUP 1GROUP 2GROUP 3GROUP 4GROUP 5GROUP 6GROUP 7GROUP 8 SOLOSOLOSOLOSOLOSOLOSOLOSOLOS

4、OLOSOLOSOLOSOLOSOLO SELECT ON INPUT 1 TRACK 1 / 13 FX RTN 1FX RTN 2FX RTN 3FX RTN 4L / R 23456789101112 2 / 143 / 154 / 165 / 176 / 187 / 198 / 209 / 2110 / 2211 / 2312 / 24 MASTER PANLOWSWEEPHIGHEFFECT / AUX SENDS L RFX / AUX 1 FX / AUX 2 FX / AUX 3 FX / AUX 4 20Hz-24dB+24dB20kHz20Hz-24dB+24dB20kHz

5、Q20Hz-24dB+24dB20kHz ZOOM V.TRACKCD-RDSPPATCHGRID SHIFT OFFSET ABORT SET LOOP SETUPPROJECTFXAUTOMATEMIXEREDIT CURSOR 789 456 123 -+0 OUT JOG SHUTTLE RECALLSTORE WHEEL IN INP MON INP 1-12 TRACKS 1-12 TRACKS 13-24 GROUP FX USER BANK UNDOREDOPRE-ROLLAUTO TOFROMIN OUT AUTO LOCATE OVER REWINDFAST FORWARD

6、STOP 55 MIX SCENE ENTERCANCEL FADER BANK EXT SYNC MAIN SCREEN GO TOMEMORY TB LEVEL RELEASE LOCK CONTRAST Q 1 Q 3 Q 5 Q 2 Q 4 Q 6 F 1F 2F 3F 4F 5F 6 LR 2 0 6 4 10 8 20 15 25 35 30 40 60 50 CLIP DISPLAY SELECT HOURSMINSSECSFRAMES BARSBEATSCLOCKS RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL 2 # SAFETY INSTRU

7、CTIONS# INFORMATIONS 1. Parts identified by the symbol are critical for safety. Replace them only with the parts number specified. 2. In addition to safety, other parts and assemblies are specified for conformance with such regulations as those applying to spurious radiation. These must also be repl

8、aced only with the specified replacements. Examples : Noise blocking capacitors, noise blocking filters, etc. 3. Use specified internal wiring. Note especially : 1) Wires covered with PVC tubing 2) Double insulated wires 3) High voltage leads 4. Use specified insulating materials for hazardous live

9、parts. Note especially : 1) Insulation Tape 2) PVC tubing 3) Spacers (insulating barriers) 4) Insulation sheets for transistors 5) Plastic screws for fixing micro switches 5. When replacing AC primary side components (trans- formers, power cords, noise blocking capacitors, etc.), wrap the ends of th

10、e wires securely around the terminals before soldering. 6. Make sure that wires do not contact heat producing parts (heat sinks, oxide metal film resistors, fusible resistors, etc.). 7. Check that replaced wires do not contact sharp edged or pointed parts. 8. Also check areas surrounding repaired lo

11、cations. 9. Make sure that foreign objects (screws, solder droplets, etc.) do not remain inside the set. SAFETY CHECK AFTER SERVICING After servicing, make measurements of leakage-current or resistance in order to determine that exposed parts are acceptably insulated from the supply circuit. The lea

12、kage- current measurement should be done between accessible metal parts (such as chassis, ground terminal, microphone jacks, signal input/output connectors, etc.) and the earth ground through a resistor of 1500 ohms paralleled with a 0.15 F capacitor, under the units normal working conditions. The l

13、eakage-current should be less than 0.5 mA rms AC. The resistance measurement should be done between accessible exposed metal parts and power cord plug prongs with the power switch (if included) “ON”. The resistance should be more than 2.2 M ohms. SYMBOLS FOR PRIMARY DESTINATION Unit destinations are

14、 indicated with letters as shown below. SymbolsPrincipal Destinations AU.S.A BEngland EEurope JJapan VGermany X1Japan X4Universal Area MAKE YOUR CONTRIBUTION TO PROTECT THE ENVIRONMENT Used batteries with the ISO symbol for recycling as well as small accumulators (rechargeable batteries), mini-batte

15、ries (cells) and starter batteries should not be thrown into the garbage can. Please leave them at an appropriate depot. PRECAUTIONS FOR LITHIUM BATTERY The lithium battery may explode when incorrectly replaced. OBSERVE THE FOLLOEING WHEN REPLACING Replace with the same make and type or equivalent r

16、ecom mended by manufacturer. Place battery in correct polarity. Do not short the terminals. Do not charge battery. Do not dispose of battery in fire. RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL 3 I. SPECIFICATIONS Specifications Power SupplyAC 120V 60Hz (US, Canada), 220-240V 50Hz (Europe) 110W Operating

17、 Temperature10 - 35 C Operating Humidity10% - 60% (without condensation) Dimensions (mm)726 (W) x 190 (H) x 579 (D) max. (with LCD tilted down) Weight17.8kg (without drive) Display320 x 240 dots STN graphic LCD with back light Sampling Rate96kHz, 48kHz, 44.1kHz, 32kHz Quantization Bit24 bit/16 bit L

18、inear Recording MediaInternal IDE Harddisk Recording TimeWith 10Gbyte Harddisk drive (24bit) FS=96kHzApprox. 9 hrs. 55 min. (12 tracks x 49 min. 45 sec.) FS=48kHzApprox. 19 hrs. 50 min. (24 tracks x 49 min. 45 sec.) FS=44.1kHzApprox. 21 hrs. 35 min. (24 tracks x 54 min. 10 sec.) FS=32kHzApprox. 29 h

19、rs. 50 min. (24 tracks x 1 hour 14 min.) Frequency Response FS=96kHz10Hz - 44kHz +0/-2dB FS=48kHz10Hz - 22kHz +0/-2dB FS=44.1kHz10Hz - 20kHz +0/-2dB FS=32kHz10Hz - 15kHz +0/-2dB ADC24bit 128-times oversampling, enhanced dual bit delta/sigma modulation DAC24bit 8-times oversampling, advanced segment

20、delta/sigma modulation Dynamic Range104dB or more (30kHz LPF, FS=44.1kHz) Distortion Ratio0.003% or less (1kHz, 44.1kHz) Channel Crosstalk80dB or less (10kHz referenced, 100 ohms terminated) Wow & FlutterBelow measurable level Analog Audio InputInputs A 1 - 4ch6.3mm Stereo Phone/XLR Combo Jack - bal

21、anced Phantom Power provided (switchable) for XLR connection 5 - 12ch6.3mm Stereo Phone/XLR Combo Jack - balanced Inputs B 1 - 12ch6.3mm Stereo Phone Jack - balanced Hi-Z12ch 6.3mm Phone Jack - unbalanced ADC In6.3mm Stereo Phone Jack - balanced AUX In6.3mm Stereo Phone Jack - balanced 2-TrackRCA -

22、unbalanced Input LevelMic mode-62 - -2dBu (+16dBu max. balanced, 1kHz) Line mode-47 - +13dBu (+31dBu max. balanced, 1kHz) Hi-Z-68 - -8dBu (+10dBu max. unbalanced, 1kHz) ADC In+4dBu (+22dBu max. balanced, 1kHz) AUX In+4dBu (+22dBu max. balanced, 1kHz) 2-Track-14dBu (+4dBu max. unbalanced, 1kHz) Imped

23、anceMic mode3k ohms (1 - 12ch) Line mode12k ohms (1 - 12ch) Hi-Z1M ohms ADC In10k ohms AUX In10k ohms 2-Track15k ohms Analog Audio OutputStereo Out6.3mm Stereo Phone - balanced Main (monitor)6.3mm Stereo Phone - balanced Nearfield (monitor)6.3mm Stereo Phone - balanced Studio Out6.3mm Stereo Phone -

24、 balanced Direct Out6.3mm Stereo Phone - balanced AUX Sends 1 - 46.3mm Stereo Phone - balanced RadioFans.CN 收音机爱 好者资料库 SERVICE MANUAL 4 Output LevelStereo Out+4dBu (+22dBu balanced max., 20k ohms load) Main (monitor)+4dBu (+22dBu balanced max., 20k ohms load) Nearfield (monitor) +4dBu (+22dBu balanc

25、ed max., 20k ohms load) Studio Out+4dBu (+22dBu balanced max., 20k ohms load) Direct Out+4dBu (+22dBu balanced max., 20k ohms load) AUX Sends 1 - 4+4dBu (+22dBu balanced max., 20k ohms load) ImpedanceStereo Out1k ohms - balanced Main (monitor)1k ohms - balanced Nearfield (monitor) 1k ohms - balanced

26、 Studio Out1k ohms - balanced Direct Out1k ohms - balanced AUX Sends 1 - 41k ohms - balanced Stereo Phones Outputx 2, 6.3mm Stereo Phone Jack - adjustable Max. Output155mW/32 ohms Digital Audio Input x 1, RCA (SPDIF) 2-channels assignable x 1, MP Light Pipe (adat/SPDIF) 8-channels/2-channel assignab

27、le Digital Audio Outputx 1, RCA (SPDIF) Master Output x 1, MP Light Pipe (adat/SPDIF) 8-channels assignable/Master Output Wordclockx 1, BNC - In/Out Foot switchx 1, 6.3mm Phone Jack MIDIx 3, 5 pin DIN - IN, OUT, THRU ASCII Keyboardx 1, 6 pin Mini-DIN Accessories3-prong Power Cable Internal Disk Moun

28、ting Kit Operators Manual OptionsIB-24LTC - SMPTE/EBU LTC Interface Board IB-24ADT - 16-channel adat Interface Board w/adat Sync IB-24SCSI - SCSI Interface Board *0dBu = 0.775Vrms The specifications are subject to change without prior notice. SERVICE MANUAL 5 II. DISASSEMBLY In case of trouble, etc.

29、, necessitating dismantling, please dismantle in the order shown in the illustrations. Reassemble in the reverse order. 1. Removal of the FRONT PANEL BLOCK ZS-378447 ST BID40X10STL BNI ZS-378447 ST BID40X10STL BNI ZS-331182 BT BID30X08STL BNI ZS-331182 BT BID30X08STL BNI ZS-331182 BT BID30X08STL BNI

30、 SERVICE MANUAL 6 2. Removal of the BOTTOM COVER ZS-331182 BT BID30X08STL BNI ZS-331182 BT BID30X08STL BNI ZS-331182 BT BID30X08STL BNI ZS-331182 BT BID30X08STL BNI SERVICE MANUAL 7 III. PRINCIPAL PARTS LOCATION PC AUX IN PC POWER BLK PC MOTHER BLK POWER SW BLK PC FILTER BLK PC CPU BLK PC ADDA BLKPC

31、 HP-HIZ BLKSW POWER BLK PC CONTROL BLK PC OPERATION R BLKPC FADER BLK PC LED PAN BLK PC PAN ENC BLK PC OPERATION L BLK PC PRE-AMP BLKPC INPUT B BLK PC INPUT A BLK PC JOG BLK PC OPE-DIST BLK SERVICE MANUAL 8 IV. SUPPLEMENTARY INFORMATION 1. Test Mode While pressing the SHIFT button, press the CANCEL

32、button to enter the DEBUG PAGE. To leave the DEBUG page, press the MAIN SCREEN button. Return to the DEBUG PAGE from any TEST MODE by pressing the CANCEL button while the SHIFT button is being pressed. 1-1. F1 (BUFFERS) For confirmation of DISK BUFFERS LEVEL. 1-2. F3 (PANEL) For confirmation of FADE

33、R TOUCH SENSE operation. F1/F2 (RED TRACK LEDS) To check whether red LED operation is correct or not. The RECORD/EDIT SELECT LED, SIGNAL CLIP LED will light up in red. All other LEDs will light. F3/F4 (GREEN TRACK LEDS) To check whether green LED operation is correct or not. The RECORD/EDIT SELECT L

34、ED, SIGNAL CLIP LED will light up in green. NOTE: After LED CHECK, even when the DEBUG mode has been escaped from, all LED indicators will go out and only renewed modes will light up in order. 1-3. F4 (AUDIO) The input AUDIO signal will be output to dircet according to display indicator specificatio

35、n. The main purpose of this function is for factory testing. 1-4. F2 (MIX DSP) F6 (PATCH) Not operational at V1.0. 2. PANEL OPERATION TEST MODE This mode is operated by the OPERATION CPU and is not affected by the CPU circuit of the CPU PCB. This test mode will operate even if the CPU PCB is not ope

36、rating properly. Turn the power on while pressing down the REWIND, FAST FORWARD, STOP and PLAY buttons. This mode can be used to confirm correct operation of the SWITCH, FADER VR, MONITOR VR, JOG, SHUTTLE and ENCODER. However, A/B SW, LINE/MIC SW, TRIM, TB LEVEL, PHONE LEVEL are omitted. NOTE: FADER

37、 operation directly after power has been input cannot be tested. 3. OTHER HIDDEN MODES 3-1 With the SHUTTLE knob turned fully to the right, turning the power on will immediately access the VERSION UP mode via the USB. 3-2 With the SHUTTLE knob turned fully to the left, turning the power on will boot

38、 up the system without running a hard disc check. This mode is convenient when the system will not startup because of hard disc data. 3-3 With the SHUTTLE knob turned 1/4 to the left, turning the power on will check hard disc content and start up the system in PROJECT initial settings. Normally the

39、DPS24 starts up in the last PROJECT created. This mode is convenient when there is a problem with the last PROJECT data and the system wont start up. SERVICE MANUAL 9 4. JIG PC BOOT DPS24 (PART No. BA-771030J) JIG PC BOOT is used for BOOT BLOCK recovery and for CPU circuit testing etc. Insert in SLO

40、T 1 on the OPTION BOARD. Make sure the power is off before inserting. The JIG PC BOOT will not work in any other slot besides SLOT 1. When the DPS24 power is turned on, the SELF CHECK function will operate to check each CHIP. If a fault is found somewhere, FAILED will appear and operation will stop.

41、 FAILED will appear when nothing after MIDI SPDIF, WCLK, ASCII are connected, but this is not an indication of faulty operation. 5. OS BOOT BLOCK RECOVERY PROCEDURE Insert the PC JIG BOOT into SLOT 1. Make sure the power is off before inserting. The JIG PC BOOT will not work in any other slot beside

42、s SLOT 1. 1. When the DPS24 power is turned on, the SELF CHECK function will operate to check each CHIP. After confir- mation, the screen will normally be returned to. 2. Press the SETUP button, then the F6(OS) button. 3. Press the F2/F3/F4 (upgrade from EPROM) button. 4. Press the F6(YES) button. 5

43、. Press the F6(OK) button. 6. OS UPDATE PROCEDURE OS UPDATE FROM CD-ROM You can update the OS from the built-in CD-ROM drive. Please use a CD-ROM that contains the OS for the DPS24. You can create the OS disc by using your PCs CD-R/W function to write the “DPS24.bin file” onto an ISO 9660 CD-ROM dis

44、c. 1. Turn the DPS24 on and insert the OS disc 2. Press the SETUP button, then the F6(OS) button. 3. Set “Update from” to “CD” with Q1 knob. 4. Press the F5/F6 (UPGRADE) button. 5. Confirm the displayed OS version. If not displayed, repeat the procedure. 6. If the correct version is displayed, press

45、 the F6(YES) button. 7. Press the F6 (OK) button. 8. Reboot the DPS24. OS UPDATE FROM USB The OS update can be made from the PC via the USB port. You must have the OS Loader software for DPS24. The following files are required for the update: dps24usb.sys (USB set up file) dps24usb.inf (USB set up f

46、ile) usbrom.exe (USB transmission software) dps24.bin (OS file for DPS24) These files must be placed in the same folder. (eg. c:DPS24) Installing the USB drivers: 1. Connect USB cable between DPS24 and PC. 2. Power up the PC and let it complete the boot up process. 3. Power up the DPS24. 4. Yous PC

47、should automatically detect the DPS24 and open the New Hardware Wizard. 5. Choose the option in the New Hardware Wizard that allows you to specify the location of the driver files. 6. Ues the BROWSE function to locate the files expanded into the folder you created. 7. Click OK and next to install th

48、e drivers. OS UPDATE FROM USB 1. Connect the DPS24 and PC with the USB cable. 2. Turn on the DPS24 and PC. 3. Press the DPS24s SETUP button, then the F6(OS) button. 4. Set “Upgrade from” to the USB port with Q1 knob. 5. Press the F5/F6(upgrade) button, then the F6(YES) button. 6. Wait for the OS to

49、be loaded from the PC. 7. The OS Loader runs only using the MS-DOS Command prompt. 8. In the Command prompt window, switch to the folder you created. (eg. c:DPS24) 9. Select the update type from the following. Normally select usbrom /v dps24.bin #1. usbrom dps24.bin - (normal) #2. usbrom /v dps24.bin - (update and checksum) #3. usbrom /bootblock dps24.bin - (overwrite boot block) Type in either of the above to execute the program. 10. Reboot the DPS24. SE