Akai GX-4000D Service Manual

1. TECHNICAL DATA
1. MODEL GX-4000D
TRACK SYSTEM
4 track, 2 channel stereo/monaural system
REEL CAPACITY
Up to 7” reel
TAPE SPEED
wow & FLUTTER
7-1/2 and 3-3/4 ips
Less than 0.08% WRMS
FREQUENCY RESPONSE
DISTORTION (1,000 Hz “0” VU)
30 to 24,000 Hz +3 dB at 7-1/2 ips
30 to 16,000 Hz +3 dB at 3-3/4 ips
SIGNAL TO NOISE RATIO
Less than 1.0% at 7-1/2 ips
Better than 60 dB
(measured via tape with peak recording level)
ERASE RATIO
Better than 70 dB
BIAS FREQUENCY
100 kHz
HEADS
(3): One GX Recording head, one GX Playback head, one Erase head
MOTOR
(1): 4-pole induction motor
FF & REWIND TIME
200 sec using 1,200 ft. tape
OUTPUT JACKS
Line (2): 0.775V (“0" VU)
Required load impedance: more than 50 kohms
Phone (1): 100 mV/8 ohms
INPUT JACKS
Microphone (2): 0.25 mV
Required microphone impedance: 600 ohms
Line (2): 70 mV
DIN JACK
SEMICONDUCTORS
DIMENSIONS
WEIGHT
POWER REQUIREMENTS
Input: 2 mV/10 kohms, Output: 0.3V
Transistors: 24. Diodes: 13, FETs: 2, IC: 1
440(W) x 315(H) x 230(D) mm
(17.3 x 12.4 x 9.1")
13.2 kg (29.1 Ibs)
100V, 50/60 Hz for Japan
120V, 60 Hz for Canada & U.S.A.
220/240V, 50 Hz for European Countries & Australia
110/120/220/240V (Switchable), 50/60 Hz for the other Countries
a
2. MODEL GX-4000DB
TRACK SYSTEM
REEL CAPACITY
4 track, 2 channel stereo/monaural system
Up to 7” reet
TAPE SPEED
BI 7-1/2 and 3-3/4 ips
WOW & FLUTTER
Less than 0.08% WRMS
FREQUENCY RESPONSE
| 30 to 24,000 Hz +3 GB at 7-1/2 ips
30 to 16,000 Hz +3 dB at 3-3/4 ips
DISTORTION (1,000 Hz “0” VU)
Less than 1.0% at 7-1/2 ips
SIGNAL TO NOISE RATIO
Better than 60 dB
(measured
via
tape
with
peak
recording
level)
__|
Dolby
Switch
ON:
Improves
up
to
10
dB
above
5
kHz
ERASE RATIO
Better than 70 dB
BIAS FREQUENCY
r 100 kHz
HEADS
(3):
One
GX
Recording
head,
one
GX
Playback
head
one
Erase
head
MOTOR
+
(1):
4-pole
induction
motor
FF
&
REWIND
TIME
200
sec
using
1,200
ft
tape
OUTPUT JACKS Line (2): 580 mV “0” VU)
Required load impedance: more than 100 kohms
Phone (1): 100 mV/8 ohms
INPUT JACKS
DIN JACKS
SEMICONDUCTORS
DIMENSION
WEIGHT’
POWER REQUIREMENT
Microphone (2): 0.25 mV
Required microphone impedance: 600 ohms
Line (2): 70 mV
Input: 2 mV/10 kohms
Output: 0.3V
Transistors: 21, Diodes: 21, FETs: 2, ICs: 5
440(W) x 315(H) x 230(D) mm
(17.3 x 12.4 x 9.4")
13.2 kg (29.1 Ibs)
120V, 60 Hz for Canada & U.S.A.
220/240V,
50
Hz
for
European
Countries
&
Australia
e ‘: pels é f
For improvement purposes. specifications and design are subject to change without notice.
110/120/220/240V
(Switchable),
50/60
Hz
for
the
other
Countries
*
For
improvement
purposes.
specifications
and
design
are
subject
to
change
without
notice.
*
“Dolby”
and
the
Double
D
symbol
are
trademarks
of
Dolby
Laboratories.
(Manufactured
under
license
from
Dolby
Laboratories.)

Akai GX-4000D Specifications

General

Track System	4-track, 2-channel, stereo/monaural system
Reel Size	Up to 7 inch reel
Tape Speeds	3 3⁄4 7 1⁄2 ips
Frequency Response	30Hz to 24kHz (7 1⁄2 ips)
Type	Reel to Reel
Heads	1 x erase
Motor	1 x capstan, 1 x reel
Wow and Flutter	0.08% (7.5 ips)
Output	0.775V (line)
Input	70mV (line)
Inputs	Line
Outputs	Line