Fostex-VM04-mix-sm维修电路原理图.pdf

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1、VM04 Service Manual Model 4ch Digital Mixer with DSP Effects FOSTEX CORPORATION 3-2-35 Musashino, Akishima, Tokyo, Japan 196-0021 FOSTEX CORPORATION OF AMERICA 15431 Blackburn Ave., Norwalk, CA 90650, U.S.A. PRINTED IN JAPAN MAR 1999 8288778000 RadioFans.CN 收音机爱 好者资料库 VM04VM04 23 SAFETY INSTRUCTIONS

2、 CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. POUR VITER LES CHOCS LECTRIQUES, INTRODUIRE LA LAME LA PLUS LARGE DE LA FICHE DANS LA BORNE CORRE- SPONDANTE DE LA PRISE ET POUSSER JUSQU AU FOND. CAUTION: ATTENTION: The excla

3、mation point within an equilateral triangle is intended to alert the user to the presence of important operating and mainte- nance (servicing) instructions in the literature accompanying the appliance. The lightening flash with arrowhead symbol, within an equilateral triangle, is intended to alert t

4、he user to the presence of uninsulated “dangerous voltage” within the products en- closure that may be of sufficient magnitude to constitute a risk of electric shock to persons. “WARNING” “TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE THIS APPLIANCE TO RAIN OR MOISTURE.” CAUTION: TO RE

5、DUCE THE RISK OF ELECTRIC SHOCK, DO NOT REMOVE COVER (OR BACK). NO USER-SERVICEABLE PARTS INSIDE. REFER SERVICING TO QUALIFIED SERVICE PERSONNEL. 1.Read instructions - All the safety and operating instructions should be read before the appliance is operated. 2.Retain instructions - The safety and op

6、erating instructions should be retained for future reference. 3.Heed warnings - All warnings on the appliance and in the operating instructions should be adhered to. 4.Follow instructions - All operating and use instructions should be followed. 5.Water and Moisture - The appliance should not be used

7、 near water - for example, near a bathtub, washbowl, kitchen sink, laundry tub, in a wet basement, or near a swimming pool, and the like. 6.Carts and Stands - The appliance should be used only with a cart or stand that is recommended by the manufacturer. An appliance and cart combination should be m

8、oved with care. Quick stops, excessive force, and uneven surfaces may cause the appliance and cart combination to overturn. 7.Wall or Ceiling Mounting - The appliance should be mounted to a wall or ceiling only as recommended by the manufac- turer. 8.Ventilation - The appliance should be situated so

9、 that its lo- cation or position does not interfere with its proper ventila- tion. For example, the appliance should not be situated on a bed, sofa, rug, or similar surface that may block the ventila- tion openings; or, placed in a built-in installation, such as a bookcase or cabinet that may impede

10、 the flow of air through the ventilation openings. 9.Heat - The appliance should be situated away from heat sources such as radiators, heat registers, stoves, or other ap- pliances (including amplifiers) that produce heat. 10.Power Sources - The appliance should be connected to a power supply only o

11、f the type described in the operating in- structions or as marked on the appliance. 11.Grounding or Polarization - The precautions that should be taken so that the grounding or polarization means of an appli- ance is not defeated. 12.Power Cord Protection - Power supply cords should be routed so tha

12、t they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords at plugs, convenience receptacles, and the point where they exit from the appliance. 13.Cleaning - The appliance should be cleaned only as recom- mended by the manufacturer. 14

13、.Nonuse Periods - The power cord of the appliance should be unplugged from the outlet when left unused for a long period of time. 15.Object and Liquid Entry - Care should be taken so that objects do not fall and liquids are not spilled into the enclosure through openings. 16.Damage requiring Service

14、 - The appliance should be serviced by qualified service personnel when: A.The power supply cord or the plug has been damaged; or B.Objects have fallen, or liquid has been spilled into the appliance; or C.The appliance has been exposed to rain; or D.The appliance does not appear to operate normally

15、or exhibits a marked changed in performance; or E.The appliance has been dropped, or the enclosure dam- aged. 17Servicing - The user should not attempt to service the appli- ance beyond that described in the operating instructions. All other servicing should be referred to qualified service personne

16、l. CH4 LOHI PRE/POST FADER PAN EFFECT SEND 10kHz100Hz INPUT 4 (-10dBV) METER CH3 LOHI PRE/POST FADER PAN EFFECT SEND 10kHz100Hz INPUT 3 (-10dBV) METER CH2 LOHI PRE/POST FADER PAN EFFECT SEND 10kHz100Hz INPUT 2 (-10dBV-50dBV) METER CH1 LOHI PRE/POST FADER PAN EFFECT SEND 10kHz100Hz INPUT 1 (-10dBV-50

17、dBV) METER EFFECT MASTER METER MASTER FADER PHONES PHONES OUTPUT (-10dBV) S/P DIF OUT L R LREFFECT TRIM TRIM A/D A/D A/D A/D D/A D/A EFFECT 8. BLOCK DIAGRAMS RadioFans.CN 收音机爱 好者资料库 VM04VM04 322 FADER PCB TABLE OF CONTENTS NOTES * Parts List and circuit diagrams are given in this manual to assist th

18、e service technician in maintaining the Model VM04 * The following accessories are supplied with VM04 as the standard accessories. Owners manual: 8288440000 AC adaptor AD-9B: 8270818003 (for USA/CND) : 8270818006 (for EUR) : 8270818007 (for UK) : 8270818010 (for JPN) * Following is the packing mater

19、ial for the Model VM04. PACK, SIDE, L, VM04: 8228446000 PACK, SIDE, R, VM04: 8228447000 CARTON, INNER, VM04: 8228722000 CARTON, OUTER, VM04: 8228901000 1. SPECIFICATIONS. 4 2. CONTROLS, INDICATORS AND CONNECTORS. 5 3. SERVICE MODE . 6 REPLACING THE BATTERY .7 4. EXPLODED VIEW . 8 5. PARTS LIST. 9 6.

20、 PCB PATTERN DRAWING. 11 7. CIRCUIT DIAGRAMS . 16 8. BLOCK DIAGRAMS. 23 CAUTION Parts marked with this sign are safety critical components. They must always be replaced with identical components. Refer to the Fostex Parts List and ensure exact replacement. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 J

21、401 FPC-17P AD+5 AD+5 AD+5 AD+5 DGND DGND ADGND ADGND ADGND ADGND VR0 VR1 VR2 VR3 VR4 JOG0 JOG1 DGNDADGND AD+5 3 2 1 R401 10KB AD+5 ADGND 3 2 1 R402 10KB AD+5 ADGND 3 2 1 R403 10KB AD+5 ADGND 3 2 1 R404 10KB AD+5 ADGND 3 2 1 R405 10KB AD+5 ADGND A 1 B 2 C 3 U401 EC12E DGND D-12DGND D+5 C301 0.1 DGND

22、 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG11 SEG12 SEG13 SEG14 SEG15 SEG16 SEG17 SEG18 SEG19 SEG20 SEG21 SEG22 SEG23 SEG24 SEG25 SEG26 SEG27 SEG28 SEG29 SEG30 SEG31 SEG32 SEG33 SEG34 SEG35 SEG36 SEG37 SEG38 SEG39 SEG40 SEG1 SEG2 SEG3 SEG4 SEG5 SEG6 SEG7 SEG8 SEG9 SEG10 SEG16 SEG13 SEG37

23、 SEG38 SEG39 SEG40 SEG18 SEG23 SEG28 SEG33 COM1 COM2 COM3 COM4 COM5 COM6 COM7 COM9 COM10 COM11 COM12 COM13 COM14 COM15 COM16 COM9 COM10 COM11 COM12 COM13 D+5D+5 DGNDDGND SEG1.40 COM1.16 To Main J12 DGNDDGND S301 TACT S302 TACT S303 TACT S304 TACT S305 TACT S306 TACT S307 TACT S308 TACT S309 TACT S31

24、0 TACT S311 TACT S312 TACT D351 LED D352 LED D353 LED D354 LED D355 LED D356 NON D357 LED D358 LED KEY0 KEY1 KEY2 KEY3 KEY4 KEY5 DIG0 DIG1 LED_A0 LED_A1 LED_K0 LED_K1 LED_K2 LED_K3 LED_K4 LED_K5 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 J302 FPC-17P D301A DIODE D301B DIODE D302A DIODE D302B DIODE D3

25、03A DIODE D303B DIODE D304A DIODE D305A DIODE D306A DIODE D304B DIODE D305B DIODE D306B DIODE D359 NON D360 LED D361 LED D362 NON R321 NON R322 NON R323 NON R324 NON R325 NON R326 NON D+5D+5D+5D+5D+5D+5 LED_A0 LED_A1 DIG0 DIG1 LED_K0 LED_K1 LED_K2 LED_K3 LED_K4 LED_K5 KEY0 KEY1 KEY2 KEY3 KEY4 KEY5 K

26、EY0.5 LED_K0.5 LED_A0.1DIG0.1 FADER ADJCH1CH2CH3CH4VIEW RECALLEFF TYPEEXITSTOREEFF PARAMENTER FADER ADJCH1CH2CH3CH4 RECALLEFF TYPESTOREEFF PARAM To Main J13 DEFINITION (Specification Unit : 0 dBV = 1 Vrms) NORMAL FADER POSITION Master fader . 80 position (Master Fader display) Input fader. 80 positi

27、on (Channel Fader display) Effect Send. 00 position MIXER SECTION INPUT 1, 2 Input Level.-50dBV -10dBV Input Impedance .20k or more Connector. 6 mm Phone Jack/Unbalanced INPUT 3, 4 Input Level.-10dBV Input Impedance .20k or more Connector. 6 mm Phone Jack/Unbalanced OUTPUT (L, R) Output Level .-10dB

28、V Load Impedance.10k or more Connector. 6 mm Phone Jack/Unbalanced PHONES OUT Output Level .20 mW MAX (16 load) Load Impedance.16 or more Connector. 6 mm Stereo Phone Jack EQUALIZER HI (Shelving Type) .18dB or more (-10dBV / 10 kHz) LO (Shelving Type) .18dB or more (-10dBV / 100 Hz) FREQUENCY RESPON

29、SE Input (-10dBV) Stereo Out (-10dBV). +1, -2dB (20Hz 20kHz) Input (-50dBV) Stereo Out (-10dBV). +1, -3dB (20Hz 20kHz) Input (-10dBV) Phones Out (20mW/16) . +1, -3dB (20Hz 20kHz) S/N (with DAT envelope filter) Input (+2dBV) Stereo Out (+2dBV).86dB or more (IHF-A) Input (-38dBV) Stereo Out (+2dBV). 6

30、6dB or more (IHF-A) Input 4 (+2dBV) Stereo Out (+2dBV) .81dB or more (IHF-A) Phones Out Phones Out Residual Noise . 66dB or more (IHF-A) DISTORTION (with DAT envelope filter) Input (+2dBV) Stereo Out (0dBV) .0.1% or less (100Hz 10kHz) Input (-40dBV) Stereo Out (0dBV) .0.1% or less (100Hz 10kHz) Inpu

31、t (0dBV) Phones Out (20mW/16) . 1.0% or less (1kHz) CROSSTALK .60dB or more (1kHz) SHOCK NOISE .-30dBVp-p or less LEVEL INDICATION Type . LCD Bargraph Meter Number of Indicated Levels . 11 dots (-48, -30, -24, -18, -12, -9, -6, -3, -1, 0, OL) Reference Level (-10dBV) Indication . -12dB DIGITAL SECTI

32、ON SAMPLING FREQUENCY.44.1kHz QUANTIZATION . 16 bit linear A/D CONVERTER .20bit, 64 times Over Sampling Enhanced Dual Bit, Delta-Sigma D/A CONVERTER . 20bit 128-time, Over Sampling, Delta-Sigma S/P DIF OUT Format . IEC 60958 (S/P DIF) Connector.Optical GENERAL DC IN AD-9B, DC9V, 650 mA (the Center Positive) DIMENSIONS. 254 (W) 186 (D) 50 (H) mm WEIGHT . Approx. 1.1 kg POWER SUPPLY USA/CND . 120VAC, 60Hz EUR/UK.