Fostex vm04 4ch digital mixer service manual
This is the 12 pages manual for fostex vm04 4ch digital mixer service manual.
Read or download the pdf for free. If you want to contribute, please upload pdfs to audioservicemanuals.wetransfer.com.
Extracted text from fostex vm04 4ch digital mixer service manual (Ocr-read)
Page 1
VM04 VM04 23 SAFETY INSTRUCTIONS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN TO PREVENT ELECTRIC SHOCK, MATCH WIDE BLADE OF PLUG TO WIDE SLOT, FULLY INSERT. POUR ÉVITER LES CHOCS ÉLECTRIQUES, 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 exclamation 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 the user to the presence of uninsulated dangerous voltage within the product's 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 REDUCE 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 operating 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 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 moved 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 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 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 of 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 that 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. 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 - 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 or exhibits a marked changed in performance; or E. The appliance has been dropped, or the enclosure dam- aged. 17 Servicing - 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 personnel. CH4 LO HI PRE/POST FADERPA N EFFECT SEND 10kHz 100Hz INPUT 4(-10dBV)METER CH3 LO HI PRE/POST FADERPA N EFFECT SEND 10kHz 100Hz INPUT 3(-10dBV)METER CH2 LOHI PRE/POST FADERPA N EFFECT SEND 10kHz 100Hz INPUT 2(-10dBV~-50dBV)METER CH1 LOHI PRE/POST FADERPA N EFFECT SEND 10kHz 100Hz INPUT 1(-10dBV~-50dBV)METER EFFECTMASTER METER MASTER FADER PHONESPHONESOUTPUT (-10dBV) S/P DIF OUT L R L R EFFECT TRIM TRIM A/D A/D A/D A/D D/A D/A EFFECT 8. BLOCK DIAGRAMS
Page 2
VM04 VM04 3 22 FADER PCB TABLE OF CONTENTS NOTES * Parts List and circuit diagrams are given in this manual to assist the service technician in maintaining the Model VM04 * The following accessories are supplied with VM04 as the standard accessories. Owner's manual : 8288440000 AC adaptor AD-9B : 8270818003 (for USA/CND) : 8270818006 (for EUR) : 8270818007 (for UK) : 8270818010 (for JPN) * Following is the packing material 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. 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. 1234567891011121314151617 J401 FPC- 1 7 PAD+ 5 AD+ 5 AD+ 5 AD+ 5 DGND DGND ADGND ADGND ADGND ADGND VR0 VR1 VR2 VR3 VR4 JOG0 JOG1 DGND ADGND 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 1B 2C 3 U401 EC12E DGND < < < < < < < To Ma in J11