Teac A 1030 A 1300 Service Manual

Page 2

GENERAL DESCRIPTION

The TEAC A-lO30 employs a precision built combination Erase/Record
head plus an independent playback head thus providing all the oper-
ating functions of a three head machine. Independent record and
playback amplifiers incorporate the latest professional circuitry.
The A-1030 is a single motor tape deck utilizing a two speed hys-
teresis synchronous motor coupled to an efficient belt drive system.
Carefully constructed to provide high performance, convenience of
operation and optimum tape handling capability, the TEAC A-1030 is
highly recommended for use with high quality audio systems.

This manual is designed to assist the service engineer by
providing adjustment and alignment instructions and care
and maintenance procedures. It also Outlines the method
to be followed when ordering needed repair parts.

Should you encounter difficulty in accomplishing any of
the alignments or adjustments or should you have questions
concerning methods or procedures, please contact the near~
est TEAC Dealer, Service Center, the TEAC Corporation or
affiliated Corporations.

Page 10

TENSION SERVO LOOP

The left tension arm is coupled
to the tension servo loop and
applies varying friction to the
supply reel brake drum. The re-
sult is to maintain tape tension
at a constant level despite the
change of diameter at the supply
reel in playback or record mode.

As tension varies, the tension
arm will move either left or
right, back tension on the sup-
ply reel will be varied accord-
ing to the direction of movement.
The tension arm at the extreme
left position will result in max.
friction being applied to the
supply reel brake drum, this in
turn will increase the tape ten-
sion tending to move the tension
arm back to the right thus main-
taining optimum overall tension.

If servo loop tension is ad-
justed, the constant back ten-
sion must also be readjusted as a
constant level of back tension

is always applied to the supply
reel in addition to that con-
trolled by the tension servo Tension Servo Loop
loop.

IMPORTANT
This tension servo tension adjustment should be made
after the back tension is adjusted.

MAXIMUM BACK TENSION

- Apply power to the unit.

- Place the empty reel (RE-702) and spring scale on the left reel
table as shown in figure.

- Place the control lever to play mode.

- Pull the scale away from the reel, the scale reading should be
350 iIOOg-cm.

- If tension is not within the specified
limit adjustment can be made by loosened
securing screw (A) and moving the spring
hook (back lever spring hook). Then the
securing screw is tightened. CK"SM

Tension Measurement

Page 35

PART 5 LIST

A'IJOO

PREAMPLIFIER
TEAC
REF NO. PARTS NO. DESCRIPTION lST 2ND
5- 1 50253581 Knob, Inner
5- 2 50253571 Knob, Outer
5- 3 50113490 Panel, Amp Trim
5- 4 50581330 VU Meter
5- 5 50253440 Knob, Lever
5- 6 50272610 Insulate Washer, A
5- 7 50230560 Insulate Washer, Fiber
5- 8 50279840 Meter Cushion
5- 9 50330080 Sheet, SW Protector
5-10 50253530 Push Button, Square, Power SW
5-11 50235480 Shield Plate, Mic
5-12 50430230 Jack, Mic 2 cond
5-13 50272620 Insulate Washer, B
5-14 50235380 Chassis Assy, Amp
5-15 50535200 Potentiometer, Dual 50KAx2
5-16 50414131 Lamp, 8V, VU Meter
5-17 50431140 Socket, Lamp
5-18 50235470 Shield Plate, SW
5-19 50937580 SW, Lever
5-20 50235491 Plate, Back
5-21 50265011 Connector Plate (Domestic Only)
50265030 Connector Plate (Export Only)
5-22 50233530 DIN Connector Holder
5-23 50430010 Connector, DIN
5-24 50489591 PC Board Assy, Osc
5-25 50233800 Angle, 050 Mount
5-26 50235461 Plate, Power SW Mount
5-27 50443210 SW, Push, Power
5-28 50535210 Potentiometer, Dual, Output 20KAx2
5-29 50432440 Jack, Headphone 3 cond
5-30 50489580 PC Board Assy, Bias Adjust
5-31 50524260 Resistor, Wire Wound 450/5W
5-32 Insulate Washer, 3.5¢x8¢xlt
5-33 50330620 Sheet, 9,, SW Protector
5-
5-33 50330620 Sheet, D, SW Protector
5-34 50489570 PC Board Assy, Rec Amp
5-35 50489560 PC Board Assy, Playback Amp
5-36 50454071 GND Terminal
5-37 50412170 Fuse Holder
5-38 50434631 Pin Jack, US 2?