Akai 4000DS Service Manual page 39

SECTION 1
Except for the parts which have been changed as per List 1 below, the composite parts of Model
4000DS Mk-11 are identical to those of Model 4000DS. Therefore, for general repairs and adjustments,
etc., please refer to 4000DS Service Manual, and GENERAL OPERATING PRINCIPLES AND
ADJUSTMENTS.
1. SPECIFICATIONS
An asterisk next to a figure indicates the minimum guaranteed performance.
TAPE SPEED
WOW AND FLUTTER
TOTAL WOW AND FLUTTER
FREQUENCY RESPONSE
LOW NOISE TAPE
WIDE RANGE TAPE
TOTAL DISTORTION F ACTOR
LINE OUTPUT
RECORDING/PLAYBACK LEVEL
SIGNAL TO NOISE RATIO
TOTAL SIGNAL TO NOISE RATIO
CROSS TALK
ERASE RATIO_
BIAS FREQUENCY___
INPUT SENSI'riviTY/IMPEDANCE
STEREO
MONAURAL
MIC
LINE
DIN
BIAS LE AK_
HIGH FREQUENCY DEVIATION
RECORDING CAPACITY _
F.FWD AND RWDT1ME
MOTOR
HEAD
ERASE HEAD
REC ORDING HEAD
PLAYBACK HEAD
TRANSISTOR
7-1/2 and 3-3/4 ips ±2%
*7-1/2 and 3-3/4 ips (19 and 9.5 cm/sec) ±3%
(7-1/2 ips 1.000 Hz speed standard tape playback)_
Less than 0.12% WRMS at 7-1/2 ips
•Less than 0.22% RMS at 7-1/2 ips
Less than 0.15% WRMS at 3-3/4 ips
•Less than 0.30% RMS at 3-3/4 ips
(3,000 Hz wow standard tape playback)_
Less than 0.28% at 7-1/2 and 3-3/4 ips _
30 to 23,000 Hz ±3 dB at 7-1/2 ips
*40 to 20.000 Hz ±3 dB at 7-1/2 ips
30 to 16,000 Hz ±3 dB at 3-3/4 ips
*40 to 15,000 Hz ±3 dB at 3-3/4 ips
40 to 21,000 Hz ±3 dB at 7-1/2 ips
40 to 16,000 Hz ±3 dB at 3-3/4 ips
(Adjust 2 kHz and 20 kHz to same rcsponcc.
-20 VU recording, using a Scotch #211 tape.)_
Less than 1.0% at 7-1/2 and 3-3/4 ips
•Less than 2.0% at 7-1/2 and 3-3/4 ips
(Scotch #211 tape. 1,000 Hz 0 VU recording and playback)
0.775V (0 dBm"±l dB)
(7-1/2 ips 250 Hz 0 VU standard tape playback)_
0.775V (0 dBm ±1.5 dB)
(Scotch #211 tape 1,000 Hz 0 VU rccording/playback) _
Better than 50 dB at 7-1/2 ips
Better than 48 dB at 3-3/4 ips___
Better than 44 dB __
Belter than 45 dB
Better than 60 dB ___
Better than 70 dB __
105 kHz ±3%_
More than 0.8 mV/30 k ohm
More than 70 mV/200 k ohm
More than 7 mV/15 k ohm____
Lentil an -30 VU_
Within 2 dB
(Playback of 3*3/4 ips 8.000
Hi
Angle adjustment tape at 7
90 minutes stereo recording using an 1,800 ft tope at 7-1/2
4 min and 40 see at 50 Hz (using 1,800 ft tape)_
4-pole induction motor
Type: SSM-1
Revolutions: 1,500/1,800 rpm 50/60 Hz _
Type: 1-4-200
(Jap: 0.6 mm
Impedance: 200 ohm ±5% at 100 kHz
IX' Resistance: 2 ohtr.
Type: R4-150
(Jap: 8 micron
Impedance: 95 ohm ±15% at I kHz
IX' Resistance: 14.7 ohm
Type: P4-I50
Gap: I micron
Impedance: 1.050 olim ±20% at 1 kHz
DC Resistance: 94.5 ohm__
2SC458I.GtO ... 4 2SC1312R(F)(G)..
2SC45Kl.Gtl» ... 2 2SC1647(R)(S)<E).
?<;rin96(KWL>. . . 1 2S('I648(R)(S)(I:.) .
-1/2 ips)
ips)
DIODE_
ZENER l/lODE
2SC45KKJ<1» ... 2
2SC1096(Ki(L)... 1
2SC1247 A(BMV 1.^2
1N34A -_ 2_
' i WZ240 ... 1
101)05 . . 2