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Производитель: Fostex
Размер: 981.67 kb
Название файла: x28_owners_manual.pdf
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They may look pleasant enough, but they can add a horrible hum to your recording. Never, under any circumstances, plug your recorder or other related electronic equ ipment into an AC circuit controlled by a rheostat. • By the same token, beware of air conditioners, refrigerators, and fluorescent and neon lights; these also are sources of electronic noise and hum. If you get lazy or forgetful and allow the oxide deposits to build-up, performance will suffer noticeably—especially high-end response and wow & flutter. IT you have total disregard for these routine maintenance procedures. the heads could become magnetized and ruin every tape you try to play. The simplest rule to follow is: Clean and demagnetize before every session. If you regularly conduct marathon recording sessions, do It every 8 hours. Note: For demagnetizing, use either a hand demag-netizer to demagnetize the heads of the X-28. Demagnetizing is vital to preserving the quality of the recording heads, yet it is also a potentially dangerous operation that can destroy circuits and ruin the heads if used improperly. Follow the instructions included with your device — to the letter! Also, keep your recorded tapes away from the demagnetizer when it is in use, since they can be erased by it. Also avoid cassette tapes with built-in or applied cleaners as they often contain abrasives that will wear out the heads of your X-28 prematurely. -Final caution: ------— Don't smoke! Large studios forbid smoking in the control room, and for a very good reason: the particles of dust produced by cigarettes, cigars and pipes may be invisible to you, but are like rocks and boulders to your sensitive electronic equipment. 33 TROUBLESHOOTING GUIDE We know we're not perfect, but we have excellent quality control and quality assurance procedures from engineering design to manufacture and shipping. Thus, “pilot enors" are far more common than "out-of-the-box’’ problems. So before you get mad at your X-28. Fostex or your dealer, please take a few minutes to run through this check list of the most common sources of user frustration: Problem: Initial setup — “There’s no sound,” or “It won't record.” 1. Is the power on? Is the AC adapter plugged into both the X-28 and the proper AC outlet? 2. Are all the plugs firmly connected to the proper jacks? 3. Could the cable be taulty? 4. Are the MASTER controls turned up? 5. Are the REC SELECT, INPUT SELECT. MONITOR select and MIX/TAPE switches set properly? 6. Is the cassette tape properly seated in the compartment? 7. Are the cassette record-protect tabs missing1? Problem: “It used to work fine, now It sounds weird or bad.” 1. When did you last clean & demagnetize? HOW did you last clean & demagnetize? (Insufficient or haphazard cleaning is the single most common problem encountered by our service technicians.) 2. Are you using the right kind of tape (70 jisec EO only)? 3. Could the problem be cue to tape drop-outs or tape deterioration? 4. Is the Dolby switch ON? Did you turn It on only for recording and not for playback (or vice versa)? 5. Is the PITCH control set to the center position? 6. Are the TRIM controls and faders properly set? 7. Are the PAN and EQ controls properly set? 8. Are the input/output levels to a connected external device properly set? 9. Is there an input/output impedance mis-match? 10.Are the sequencer and/or MIDI-controlled instruments properly programmed? If the problem persists, contact your local dealer or Fostex for the name of your nearest service facility. SPECIFICATIONS INPUTS (1-3) Inputs 1-4 Microphone Impedance Less than 10 кП Input impedance 20 kn Normal inpul level MIC -60 dBv (1mV) LINE -10 dBv (0.3V) Inputs 5-6 Input impedance 10 кП Normal inpul level -10 dBv (0.3V) AUX RTN (L, R) Input impedance 20 кП Normal input level -20 dBv <0.1 V) LINE OUT (L, R) Output load impedance 10 kQ or more Normal output level -10 dBv (0.3V) AUX SEND Output load impedance 10 kn or more Normal output level -10 dBv (0.3V) MONITOR OUT (L, R) Output load impedance 10 kn or more Normal output level ^10 dBv (0.3V) TAPE OUT (1, 2, 3r 4) Output load impedance 10 kn or more Normal output level -10 dBv (0.3V) HEADPHONE OUT (STEREO) Load Impadanca 40 n EQUALIZER (HI, LO;L, R) ± 12 dB (at 100 Hz, 10 kHz) RECORDING TAPE Compact cassette C-30. C-90 I EC TYPE II for use st high bias position (TDK SA, MAXELL UD XLII) RECORD TRACKS 4 tracks, one direction Simultaneous recording of up to 4 tracks NOISE REDUCTION Dolby B (ON/OFF Switehable} TAPE SPEED 4.75 cm/s (1-7/8 ips) WOW AND FLUTTER ±0.1% (I EC/AN SI) FAST WIND TIME 120 seconds (C-60 cassette tape) PITCH CONTROL i 10% RECORDING TIME FREQUENCY RESPONSE 3D minutes (C-60) Mixer section 20 Hz - 20 kHz Recorder section 40 Hz - 12.5 kHz S/N RATIO 56 dB or more CROSSTALK 5D dB or more (at 1 kHz} ERASURE RATIO 70 dB or more (at 1 kHz) HEADS 4-channel Hard Permalloy REG/PLAY 4-channel Fertile ERASE POWER ...