Fostex 280 - Specifications; Technical Specifications; Trouble-Shooting Guide; Initial Set-Up, No Sound

section a SPECIFICATIONS
INPUT x 8
Input 1 -4
MIC impedance
Input impedance
Rated input level MIC
Rated input level LINE
Input 5~8
Input impedance
Rated input level
AUX RTN (L, R)x1
Input impedance
Rated input level
Less than lOkfl
20k0
- 60dBV (ImV)
-lOdBV (0.3V)
20kQ
-lOdBV (0.3V)
6kQ
-lOdBV (0.3V)
STEREO OUT <L, R)/MONITOR OUT (L, R)/AUX SEND X 2
Output load impedance
Rated output level
TAPE OUTX4
Output load impedance
Rated output level
HEADPHONE
Output load impedance
Maximum output
EQUALIZER
Shelving
Higher than lOkC
-lOdBV (03V)
Higher than lOkfi
-lOdBV (03V)
8-500
80mW
100Hz ±15dB
10kHz ±15dB
200Hz —5kHz ±15dB
Parametric
RECORDING TAPE
Cassette tape C-60, C-90
Hi-position (Cr0 2 , Type 2)
TDK SA r MAXELL XLII or equivalent
RECORDING TRACK
4 track one way recording
NOISE REDUCTION
Dolby C type (ON/OFF switchable)
TAPE SPEED
WOW FLUTTER
PITCH CONTROL
RECORDING TIME
FREQUENCY RESPONSE
Mixer section
Recorder section
S/N
9.5cm/s
0.05%
± 1 0 %
15 minutes (C-60)
20Hz-40kHz
40Hz- 14kHz
Mixer section
Recorder section
DISTORTION
Mixer section
Recorder section
CROSSTALK
Mixer section
Recorder section
HEAD
4 channel erase (Ferrite)
4 channel record/playback
FAST WIND TIME
ERASURE
POWER CONSUMPTION
WEIGHT
PHYSICAL DIMENSIONS
MIC 65dB WTD
LINE 76dB WTD
65dB WTD
Less than 0,05% (1kHz)
Less than 1.5% (1kHz. OdB)
Better than 60dB (1kHz)
Better than 50dB (1kHz)
(Hard Permalloy)
110 seconds (C-60 tape)
Better than 70dB (1kHz)
100V 19W
120V 22W
220V 22W
240V 22W
5kg.
105(H) x417(W)x 345(D)
Dolby and the double-D symbol are trademarks of Dolby
Laboratories Licensing Corporation,
Noise reduction system manufactured under license from
Dolby Laboratories Licensing Corporation.
section io TROUBLE-SHOOTING GUIDE
We know we’re not perfect, but we have excellent quality con¬
trol and quality assurance procedures firmly in place from
engineering design throughout manufacture and shipping.
Thus “pilot errors” are far more common than “out-of-the-
box” problems
So before you get mad at your 280, 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 SET-UP, NO SOUND.
1. Is the power on? (You’d be amazed!)
2. Are all the plugs well-connected to the right jacks?
3 . Could the cable be faulty?
4 . Are the MASTER controls turned up?
5 . Is there a MUTE button engaged?
6 . Have you selected anything on the MONITOR selector?
7 . Are you in INPUT monitor?
8 . Is the cassette tape properly seated in the compartment?
9 . Are the cassette record-prevention tabs missing?
10 . Are the INPUT/TAPE, MIX/TRK and RECORD TRACK
selectors set properly?
•PROBLEM: IT USED TO WORK FINE, NOW IT
SOUNDS WEIRD OR BAD.
1. When did you last clean & demagnetize? (This is the sin¬
gle 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?
5 . Is the PITCH control ON?
6 . Are the gain controls and gain stages properly set?
7 . Are the PAN and EQ controls properly set?
8 . Are the input/output levels to an external unit properly
calibrated?
9 . Is there an input/output impedance mis-match?
10 . Are the sequencer and/or MIDI-controlled instruments
properly programmed?
If your problem is still nagging, contact your dealer or Fostex
for the name of your nearest service facility.