Fostex X-28 - Troubleshooting and Specifications; Troubleshooting Guide; Specifications

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 errors” 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 frustra¬
tion:
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 faulty?
4. Are the MASTER controls turned up?
5. Are the REC SELECT, INPUT SELECT, MONI¬
TOR select and MIX/TAPE switches set properly?
6. Is the cassette tape properly seated in the compart¬
ment?
7. Are the cassette record-protect tabs missing?
Problem: “It used to work fine, now It sounds
weird or bad.”
1. When did you last clean & demagnetize? HOWdid
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 ^isec EQ
only)?
3. Could the problem be due 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. A r e the sequencer and/or MIDI-controlled instru¬
ments properly programmed?
If the problem persists, contact your local dealer or
Fostex for the name of your nearest service facility.
INPUTS (1-8)
Inputs 1-4
Microphone Impedance
Input impedance
Normal input level
Inputs 5-3
Input impedance
Normal input level
AUX RTN (L, R)
Input impedance
Normal input level
LINE OUT {L, R)
Outpul load impedance
Normal output level
AUX SEND
Output load impedance
Normal output level
MONITOR OUT (L, R)
Output load impedance
Normal output level
TAPE OUT {1,2, 3,4)
Output load impedance
Normal output level
HEADPHONE OUT (STEREO)
Load Impedance
EQUALIZER (HI, LO; L, R)
RECORDING TAPE
Less than 10 hti
20 kn
MIC -60 dBv (ImV)
LINE -10 dBv (0,3V)
10 kn
-10 dBv (0.3V)
20 kn
-20 dBv (0,1V)
10 kQ or more
-10 dBv (0,3V)
10 kn or more
-10 dBv (0.3V)
lOkl'ior more
-10 dBv (0.3V)
10 kn or more
-10 dBv (0,3V)
40 n
± 12 dB (an00 Hz, 10 kHz)
Compact cassette C-S0.
090
I EC TYPE II for use at high
bias position
(TDK $A, MAXELL UD
XLII)
RECORD TRACKS
NOISE REDUCTION
TAPE SPEED
WOW AND FLUTTER
FAST WIND TIME
PITCH CONTROL
RECORDING TIME
FREQUENCY RESPONSE
Mixer section
Recorder section
S/N RATIO
CROSSTALK
ERASURE RATIO
HEADS
POWER REQUIREMENT
DIMENSIONS (WxDxH)
WEIGHT
4 tracks, one direction
Simultaneous recording of
up to 4 tracks
Dolby B [ON/OFF
Switehable)
4.75 cm/s (1-7/8 ips)
±0,1% (I EC/AN SI)
120 seconds (C-G0
cassette tape)
i 10 %
3D minutes (C-60)
20 Hz - 20 kHz
4D Hz ■ 12,5 kHz
56 dB or more
5D dB or more (at 1 kHz)
70 dB or more (at 1 kHz)
4-channel Hard Permalloy
REG/PLAY
4-channel Fertile ERASE
DC 12 V (11 - 15V)
(FOSTEX AD-12T AC
Adaptor)
AC 120V: 13W
AC 220/240V: 15W
331 x 193 x 65 mm
1.75 kg
Specifications subject to change without notice.
* Dolby noise reduction manufactured under licence from Dolby
Laboratories Licensing Corporation. “Dolby" and the double-D
symbol are trademarks of Dolby Laboratories Licensing Corpo¬
ration
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