ramsaWRDA7service 电路图.pdf

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1、SPECIFICATIONS General Power requirement :AC 120 V 60 Hz Power consumption :105 W (with options) Frequency response :20 Hz - 20 kHz, +1 dB - 2 dB T.H.D. (total harmonic distortion) :Less than 0.1 % (input = +10 dB/1 kHz, output = +4 dB/RL 600 ) Equivalent input noise :128 dB (Rs = 150 Input sensitiv

2、ity = 60 dB typical) Residual noise :93 dB typical Maximum voltage gain :84 dB: MIC/LINE(1-16) in to BUS out 84 dB: MIC/LINE(1-16) in to MASTER out 84 dB: MIC/LINE(1-16) in to AUX out Common Mode Rejection Ratio :More than 80 dB (1kHz) Crosstalk :90 dB typical (1kHz) Dynamic Range (Fs = 48kHz, DIN a

3、udio filter) : 113 dB typical : DA converter (digital in to analog out) 112 dB typical : AD converter (analog in to digital out) 110 dB typical : AD + DA (analog in to analog out) AD Converter :24 bit, 64 times oversampling (input 1 to 16) 20 bit, 64 times oversampling (aux returns 3 to 6) DA Conver

4、ter :24 bit, 64 times oversampling (MASTER, MONITOR A) 24 bit, 128 times oversampling (MONITOR B) 20 bit, 128 times oversampling (aux returns 3 to 6) Internal signal processing :32 bit (Dynamic range 192 dB) Sampling Frequency (Fs) :Internal: 44.1 kHz and 48 kHz External: 44.1 kHz 6 % and 48 kHz 6 %

5、 Signal delay :Less than 2.5 ms, MIC/LINE input to MASTER out R Audio Mixer WR-DA7 ORDER NO. AVS9805093C1 D29 C 1998 Matsushita Communication Industrial Co., Ltd. A l l r i g h t s r e s e r v e d . U n a u t h o r i z e d c o p y i n g a n d distribution is a violation of law. The Meter Bridge show

6、n in photo is one of the optional accessories. RadioFans.CN 收音机爱 好者资料库 This service information is designed for experienced repair technicians only and is not designed for use by the general public. It does not contain warnings or cautions to advise non-technical individuals of potential dangers in

7、attempting to service a product. Products powered by electricity should be serviced or repaired only by experienced professional technicians. Any attempt to service or repair the product or products dealt with in this service information by anyone else could result in serious injury or death. !WARNI

8、NG CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. This symbol warns the user that uninsulated voltage within the unit may have sufficient magnit

9、ude to cause electric shock. Therefore, it is dangerous to make any kind of contact with any inside part of this unit. This symbol alerts the user that impotant literature concerning the operation and maintenance of this has been included. Therefore, it should be read carefully in order to avoid any

10、 problems. There are special components used in this equipment which are important for safety. These parts are indicated by the ” Y ” mark on the schematic diagram and the replacement parts list. It is essential that these critical parts should be replaced with manufacturers specified parts to preve

11、nt shock, fire, or other hazards. Do not modify the original design without permission of manufacture. IMPORTANT SAFETY NOTICE Dynamics Compressor Threshold :40 dB - 0 dB (1 dB/step) Ratio :1.0, 1.1, 1.3, 1.5, 1.7, 2.0, 2.5, 3.0, 3.5, 4.0, 5.0, 6.0, 8.0, 10, 20, (16 points) Attack time :0 ms - 250 m

12、s (1 ms/step) Release time :5 ms - 2000 ms (5 ms/step) Gain :0 dB - +12 dB (0.5 dB/step) Gate Threshold :80 dB - 15 dB (1 dB/step) Attack Time :0 ms - 250 ms (1 ms/step) Release time :5 ms - 2000 ms (5 ms/step) Expander Threshold :80dB - 15dB (1dB/step) Ratio :1.0, 2.0, 3.0, 4.0, 5.0, 6.0, Attack ti

13、me :0 ms - 250 ms (1 ms/step) Release time :5 ms - 2000 ms (5 ms/step) Range :0 dB - +40 dB (0.5 dB/step) Equalizer LOW band PEQ (parametric equalizer) type:Q = 0.5 - 50 (41 steps) F = 20 Hz - 20 kHz (1/12 oct step) G = 15 dB (0.5 dB/step) LOW band SHL (shelving low) type :F = 20 Hz - 1.6 kHz (1/12

14、oct step) G = 15 dB (0.5dB/step) LOW band HPF (high-pass) type :F = 20 Hz - 1.6 kHz (1/12 oct step) LOW-MID band PEQ type :Q = 0.5 - 50 (41 steps) F = 20 Hz - 20 kHz (1/12 oct step) G = 15dB (0.5dB/step) HIGH-MID band PEQ type :Q = 0.5 - 50 (41 steps) F = 50 Hz - 20 kHz (1/12 oct step) G = 15 dB (0.

15、5 dB/step) HIGH band PEQ type :Q = 0.5 - 50 (41 steps) F = 50 Hz - 20 kHz (1/12 oct step) G = 15 dB (0.5 dB/step) HIGH band SHH (shelving high) type :F = 1 kHz - 20 kHz (1/12 oct step) G = 15 dB (0.5 dB/step) HIGH band LPF (low-pass) type:1 kHz - 20 kHz (1/12 oct step) RadioFans.CN 收音机爱 好者资料库 Delay

16、:0 - 14,400 samples/0 - 300 ms (Fs = 48 kHz), 0 - 326 ms (Fs = 44.1 kHz) Phase :normal/reverse (switchable) Stereo meter :Bar graph type LED, Left and Right, 20 points for each VU or PPM (selectable), Peak hold on/off, Fader :100 mm motor fader ( x 21), +10 db - 90 dB dB Display :LCD, 320 x 240 dot,

17、 with backlight Memory :SCENE MEMORY (Snapshot) 50 registers CHANNEL library50 registers EQUALIZER library50 registers DYNAMICS library50 registers AUTOMATION4 mix Ambient operating temperature :0 C - 40 C (32 F - 104 F) Dimensions (mm) :698 (W) x 244 (H) x 549.5 (D) Weight (without options) :23kg (

18、51lbs) Finish :ABS resin (Top Panel), Blue black Standard Accessories :Power Cord, Users Guide, Warranty Card, Registration Card Dimensions and weights indicated are approximate. Specifications are subject to change without notice. Digital In and Out 2TR IN (INPUT 15,16) : In/Out :In Format :IEC 958

19、 Professional (AES/EBU) or Consumer (S/PDIF) switchable Level :RS-422 (AES/EBU) or 0.5 V pp/75 (S/PDIF) Connector :XLR 3-31 REC OUT : In/Out :Out Format :IEC 958 Professional (AES/EBU) or Consumer (S/PDIF) switchable Level:RS-422 (AES/EBU) or 0.5 Vpp/75 (S/PDIF) Connector :XLR 3-32 AUX RETURN 1/2 :

20、In/Out :In Format :IEC 958 Consumer (S/PDIF) Level :0.5 V pp/75 Connector :RCA pin jack Input TypeSource ImpedanceSignal Level (Nominal-before clipping) Connector Type CH input 1-8 5 kmics, 50 - 600 60 dB - 46 dBXLR 3-31 (bal) lines, 600 +10 dB - +24 dBXLR 3-31 (bal) CH input 9-16 5 kmics, 50 W - 60

21、0 60 dB - 46 dBTRS phone jack (bal) lines, 600 +10 dB - +24 dBTRS phone jack (bal) CH Insertion Returns 1-16 10 k lines, 600 +4 dB - +18 dBTRS phone jack (unbal) 2TR B IN (analog) 10 k lines, 600 +4 dB - +18 dBTRS phone jack (bal) AUX returns 3-6 10 k lines, 600 +4 dB - +18 dBTRS phone jack (unbal)

22、Input TypeOutput ImpedanceAdapted Load ImpedanceSignal Level (Nominal-before clipping) Connector Type MASTER L/R 5 k 150 lines 600 +4 dB - +18 dB XLR 3-32 (bal) AUX sends 3 - 6 75 lines 10 k +4 dB - +18 dB TRS phone jack (unbal) INSERTION 1 - 16 10 lines 10 k +4 dB - +18 dB TRS phone jack (unbal) RE

23、C OUT L/R (analog) 150 lines 10 k +4 dB - +18 dB TRS phone jack (bal) MONITOR A out L/R 150 lines 600 +4 dB - +18 dB TRS phone jack (bal) MONITOR B out L/R 150 lines 600 +4 dB - +18 dB TRS phone jack (bal) Headphones 8 phones 40 /8 400 mW/100mW Stereo phone jack (unbal) Analog Inputs (0 dB = 0.775 V

24、rms, 0 dBV = 1 Vrms) Analog Outputs (0 dB = 0.775 Vrms, 0 dBV = 1 Vrms) RadioFans.CN 收音机爱 好者资料库 AUX SEND 1/2 : In/Out :Out Format :IEC 958 Consumer (S/PDIF) Level :0.5 V pp/75 Connector :RCA pin jack WORD CLOCK IN : In/Out :In Level :TTL/75 switchable Connector :BNC WORD CLOCK OUT/THROUGH : In/Out :

25、Out Level :TTL/75 , Pass-through (75 OFF) or termination (75 ON) Connector :BNC MIDI IN : In/Out :In Format :MIDI Connector :DIN Connector 5P MIDI OUT : In/Out :Out Format :MIDI Connector :DIN Connector 5P TO PC : In/Out :In and Out Connector :Mini-DIN Connector 8P RS422/485 : In/Out :In and Out Con

26、nector : D-sub 9P FOOT SWITCH : In/Out :In Level :TTL level, Normally Open (Unlatch type) Connector :Phone jack Optional Accessories Meter Bridge : Type :Bargraph LED, 26 channels, 15 points for each Format :RAMSA original Level NET II Power :DC 7 V Connector :D-sub 15P WR-ADTA (ADAT Interface card

27、(8 in / 8 out) Type :ADAT (DIRECT OUT / BUS / AUX / MASTER, Input 9-32) In/Out :In and Out Connector :Optical WR-TDIF (TDIF Card (8 in / 8 out) Type :TDIF (DIRECT OUT / BUS / AUX / MASTER, Input 9-32) In/Out :In and Out Format :TDIF-1 Connector :D-sub 25P (in and out) WR-AESS (AES/EBU Card (8 in / 8

28、 out) Type :AES/EBU/SPDIF Signal type :RS422 Connector :D-sub 25P (in and out) WR-ADDA (A-D/D-A Card (8 in / 8 out) Input 1 - 8 (balanced) Indicated impedance :10k Nominal source impedance :50 600 Nominal input level :+4dB (1.23V) Maximum input level before clipping :+18dB (6.15V) Connector type :D-

29、sub 25P Output 1 - 8 (balanced) Indicated impedance :10k Nominal source impedance :150 Nominal input level :+4dB (1.23V) Maximum input level before clipping :+18dB (6.15V) Connector type :D-sub 25P WR-SMPT (SMPTE/V SYNC Card) SMPTE IN In/Out :In Format :SMPTE (LTC) Signal type :nominal -10dBV / 10k

30、Connector :XLR V SYNC In/Out :In Format :NTSC (B/W or color) / PAL Signal type :75 , termination Connector :BNC WR-TNDM (TANDEM Card (for running two DA7mixers simultaneously) Type :TANDEM connection In/Out :In and Out Format :RAMSA SSA Signal type :RS422 Connector :D-sub 25P PRODUCT COMPLIES WITH D

31、HHS RULES 21 CFR SUBCHAPTER J APPLICABLE AT DATE OF MANUFACTURE SAFETY PRECAUTIONS GENERAL GUIDELINE 1. When service is required, observe the original lead dress. Components, wires or cables that indicate evidence of overheating or other electrical or mechanical damage should be replaced. 2. After s

32、ervicing see to that all the protective devices, such as insulation tape, shields must be properly installed. 3. After servicing, make the following leakage current checks to prevent the customer from being exposed to shock hazards. LEAKAGE CURRENT COLD CHECK 1. Unplug the AC cord and connect a jump

33、er between the two prongs on the plug. 2. Measure the resistance value, with an ohmmeter, between the jumpered AC plug and each exposed metallic cabinet part on the equipment such as screwheads, connectors, control shafts, etc. When the exposed metallic part has a return path to the chassis, the rea

34、ding should be between 1M and 5.2M . When the exposed metal does not have a return path to the chassis, the reading must be (infinity). Any resistance value below this range indicates an abnormality which requires corrective action. 3. Repeat the test with the AC switch in the OFF position. LEAKAGE

35、CURRENT HOT CHECK 1. Plug the AC cord directly into adaptor socket and plug adaptor into the AC outlet. Do not use an isolation transformer for this check. 2. Connect a 1.5k /10W resistor, paralleled by 0.15 F capacitor, between each exposed metallic part on the unit and a good earth ground such as

36、a water pipe, as shown in Figure 1. 3. Use an AC voltmeter, with 1000/volt or more sensitivity, to measure the potential across the resistor. 4. Check all exposed metallic parts of the cover (BNC connector, Handle bracket, Metallic cabinet, Screwheads, Metallic overlays, etc.), and measure the volta

37、ge at each point. 5. Reverse the AC plug in the AC plug adaptor and re-peat each of the above measurements. 6. The potential at any point should not exceed 0.75 V RMS. A leakage current tester (SIMPSON MODEL 229 or equivalent) may be used to make the hot checks. Leakage current must not exceed 0.5 m

38、illiampere. In case a measurement is outside of the limits specified, there is a possibility of a shock hazard, and corrective action must be taken before returning the instrument to the customer. AC VOLTMETER 1.5 k 0.15 F Water Pipe (Earth Ground) Test all exposed metal parts DEVICE UNDER TEST AC P

39、LUG ADAPTOR AC OUTLET Ground Lead Disconnected during safety check. Fig. 1 Leakage Current Hot Check CONTENTS Major Operating Controls and Their Functions.1 Self Check Procedure. 15 Wiring Diagram . 22 Block Diagram Overall Block Diagram. 23 Main Board (CPU Section) . 24 Main Board (Panel Control CP

40、U Section). 25 Main Board (DSP Section-1) . 26 Main Board (DSP Section-2) . 27 Main Board (Audio Interface Section). 28 AD/DA Board (1/2). 29 AD/DA Board (2/2). 30 Fader Drive Board (1/2). 31 Input Switch Board/Fader Drive Board (2/2). 32 HA Board and INS Board. 33 Monitor VR/HP/TB Boards. 34 EFX Board . 35 Block Diagram . 36 Level Diagram. 37 Schematic Diagram Monitor VR/HP/TB Boards. 39 Bus Relay Board.