Teac A 7300 Service Manual

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GENERAL DESCRIPTION

TEACS A-7300 and A-73OO 2T
are high quality stereo tape
decks, representing a New
Generation in the design and
construction of recording
equipment. With AC reel motors
and Direct-Drive Servo-cont-
rolled DC Motor-Capstan, all
controlled by Integrated Cir-
cuit (1C) Logic Circuitry,
these decks provide highly
reliable operation at greatly
reduced noise and heat levels.
With almost all relays replaced
by Logic Circuits, transport
control is quick and positive
and governed by 6 calculator-
like buttons on the control
center. Advanced electronics
are also utilized.

This manual is the final
version and supersedes previous
provisio 1 manual.

PRODUCT OFJAPAN

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SPECIFICATIONS

MECHANICAL é \'

Tracks: A-7300 4 track 2 channel stereophonic
track 2 channel manophonic
track 1 channel monophonic

#4.

A-7300 2T 2 track 2 channel stereophonic
2 track 2 channel monophonic .
2 track l channel monophonic

Heads: Erase X1, Rec X1, Playback > Reel Size: 10-1/2" maximum NAB reel
Tape Speeds: A-7300.....7-l/2 ips & 3-3/4 ips

A-7300 2T..15 ips & 7-1/2 ips

Motors: Direct drive DC servo capstan motors Xl
6-pule eddy-current induction motors for
reel drive X2

Wow & Flutter: 0.05 2 at 15 ips (W-RMS)
0.06 x at 7-1/2 ips (W-RMS)
0.10 2 at 3-3/4 ips (W-RMS)
Wow and flutter measured according to
weighted (W-RMS) NAB standard using
TEAC YTT-2004/2003/2002 flutter-free tape.
Above value is measured during playback.

Fast Winding Time: Approx. 150 seconds or less with 1800 ft tape
Pcwer Requirement: 117 V 60 Hz 80 W
Weight: 62 lbs (28 Kg) net

Dimensions: 21-5/8 (H) 17-3/8" (W) 9-3/4" (D)
548 (H)X440 (W)X246 (D) mm

EL EC TR/ CAL

0 d3 = .
0 775 v Frequency Response: (Measured at 20 dB below the Spesified level)

Refer to page 11,12,13 Freq. Response Limits chart

Input Impedance: - LINE: 50 K Do): more
MIC: 6000 (balanced)
Output Load Imp: LINE OUT: 10 Knot more
HEADPHONE: 8 0
Equalization: A-7300 7-1/2 ipe. . .50 u S 8 3180 AS
(Playback) 3-3/4 ips. . 30;: s & 3180MB

A-7300 2T 15 11:5. . . . . .SOuS 5 3180 #5
7-1/2 ips. . .SOMS & 3180;45

Output Level: OUTPUT: 0 513 +6 dB :1 dB (max.)
HEADPHONE: -17 dB -11 dB 12 dB (max.)
Input Level: LINE: -8 dB -18 dB 12 dB(min.)
MIC: 4:8 dB -58 dB 12 dB(min.)

with ATT (dB) 0 (back panel)
-38 dB:3 :13 (min.)
with ATT (dB) 20 (Back panel)

Bias Frequency: 100 [(1-12 (:5 KHz: Push-pull Oscillator)

Crosstalk Rejection: 50 dB or more, adjacent track at 1 RH:

Channel Separation: L5 dB (4T. 2T) or more, channel to
channel at 1 KB:

Erasure: 68 dB (41), 65 dB (21) or more
Signal~To-Noise

Ratio: Better than 53 dB at 15 ips
(playback) Better than 52 dB at 7-1/2 1ps

Better than Rs dB at 3-3 4 11):

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