Specifications - Akai M-10 Service Manual

I. SPECIFICATIONS
STYLE : Portable
WEIGHT 37.4 lbs (17 kg)
DIMENSIONS 14" x 14" x 8-7/8"
(358 x 358 x 227 mm)
POWER SUPPLY AC 100 to 240 V, 50/60 Hz
RECORDING SYSTEM
In-line 4-track stereo, monaural record-
ing by using Cross-field Bias Head.
PLAYBACK SYSTEM
IN-line 4-track stereo, monaural play-
back.
TAPE SPEED 1-7/8, 3-3/4 and 7-1/2 ips.
TAPE SPEED DEVIATION
Within + 0.8%
WOW AND FLUTTER
(Play back only) : Less than 0.1% 1r.m.s. at 7-1/2 ips.
Less than 0.2% r.m.s. at 3-3/4 ips.
Less than 0.3% r.m.s. at 1-7/8 ips.
FREQUENCY RESPONSE
30 to 25,000 Hz + db at 7-1/2 ips.
30 to 18,000 Hz + db at 3-3/4 ips.
40 to 9,000 Hz +4 db at 1-7/8 ips.
SIGNAL TO NOISE RATIO
: Better than 48 db (Forward Operation)
- Better than 45 db (Reverse Operation)
DISTORTION Within 3% at Line Output, 1,000 Hz O
VU Recording and Playback.
CROSS TALK Less than —65 db (Monaural)
Less than —43 db (Stereo)
ERASE RATIO Less than —70 db
INSULATION RESISTANCE :
More than 50 M.Ohms
INSULATION DURABILITY
: $00 V. AC for more than one minute
duration.
LINE OUTPUT Output Impedance ........ 100 Ohms.
Required load impedance more than 25
K.Ohms.
1.23 V (+4 dbs)
POWER OUTPUT 8 Watts (r.m.s.) per channel, total 16
(External watts
. Speaker Jack) Inpedance: «4 vscceas coeds 8 ohms
DIN OUTPUT : O4V
Output Impedance ....... 10 K.Ohms.
Required load impedance more than 50
K.Ohms.
LINE INPUT Above 50 mV (~25 dbs)
Impedance .......:..... 175 k.Ohms.
DIN INPUT High ........ Above 50 mV (—25 dbs)
Impedance ........ 150 mV (—45 dbs)
LOW exe ee ont Avove 5 mV (—45 dbs)
Impedance ............. 27 K.Ohms.
MIC. INPUT Above 0.5 mV (—65 dbs)
Impedance ............. 4.7 K.Ohms.
FAST FORWARD AND REWIND TIME
: 85 seconds for a full 1,200 foot tape at
50 Hz.
65 seconds for a full 1,200 foot tape at
60 Hz.
MONITOR SYSTEM : The program being recorded can be
monitored by using.
Stereo Headphonc (8 Ohms) .......
Stcteo Headphone Jack.
Crystal Receiver . Line Output Jack.
MOTORS
CAPSTAN MOTOR
Hysteresis Synchronous 3-speed (2-4-8
pole) motor
Condenser Capacity 3 uF (50 Hz)
2 uF (60 Hz)
Revolution 3,000 — 1,500 750r.p.m. (50 Hz)
3,600 — 1,800 900r.p.m. (60 Hz)
REEL MOTOR
i112,outer-rotor motors.
Revolutions 930 r.p.m. at 50 Hz 100 V
1,120 r.p.m. at 60 Hz 110 V
HEADS
REC/PLAY HEAD
: In-line 4-track stereo and monaural
Impedance ... 1,200 Ohms at 1,000 Hz.
Capi: fii ote Bae OF Se 2/1,000 mm
ERASE HEAD In-line 4-track stereo
Impedance ...... 500 Ohms at 60 KHz.
Gap: erected Be 0.2mm
BIAS HEAD In-line 4-track stereo
Impedance ...... 500 Ohms at 60 KHz.
Gap: :onccrseea ea taal aca Se 0.2 mm
RECORDING LEVEL INDICATOR
VERTICAL Indication VU Meter x 2
TRANSISTOR & IC USED
2 ICAA-072D 4 2SD92
2 2SC458 (B) 7 28C372
4 2SC693FU 4 2SC971
1 2SD223
DIODE USED 1 SB-3-01P 3 IN34A
1 10D4 15B2
4 V06C 1 RD24A (M)
REELS USED 7", 5", 3" reels
10-1/2" Reel Adaptor available optional
accessory)
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