Teac A 2340 SX Service Manual

Page 2

1. GENERAL DESCRIPTION

This TEAC A-234OSX 4 channel open reel tape deck was manufactured with pride by the crafts
men of TEAC Corporation. It contains all of the features which made the earlier A-2340RS one of
the most popular 4 channel open reel tape decks ever sold. In addition, the A-234OSX has built-in
SIMUL-SYNC and an added CUE lever function. It offers operating speeds of 7-1/2 ips and 3-3/4
ms.

The basic design of the A-234OSX is highly similar to that of the A-2340RS. Therefore, much of
the information in this service manual may be applied to the A<2340RS also.

TABLE OF CONTENTS

1. General Description ..................... 3
2. Specification and Service Data . . . . . . . . . . . . r . 4
34 Tools for Testing and Maintenance ............ 5
4. Partial Dis-assembly ..................... 6
5. Tape Transport Parts Location .............. 8
6. Head Replacement and Alignment ............ 9
7. Measurement and Adjustment ............... 10
-MECHANICAL~
8. Measurement and Adjustment ............... 13
-ELECTRICAL--
9. Trouble-shooting ................. V ...... 20
10 Service and Maintenance .................. 21

11. Simplified Schematic with level
indications ........................... 22

Page 32

PARTS LIST

BEENU. PARTS NO. DESCRIPTION REMARKS
3 - 1 *55520461 Panel, Ampl.

3 - 2 *55020290 Panel, Ampl.; Trim

3 - 3 55340910 Knob, A

3 - 4 55040591 Knob, Lower

23 - 5 50253750 Knob

3 - 6 50236430 Escutcheon, Record Lamp

3 - 7 50236500 Escutcheon, VU Meter

3 - 8 *50332550 Washer, Insulating; Jack

3 - 9 *55320060 Escutcheon, Button

3 - 10 50236512 Clamp, Meter Escutcheon

3 - 11 50236420 Retainer, VU Meter

3 - 12 50535240 Vart Rest, 100k ohm

3 <13 51501170 Var, Res., Outer Shaft 100k ohm/Inner 10k ohm
3 - 14' 50430240 Jack, Phone; Single

3 < 15 50432450 Jack, Phone; 3 Cond.

3 - 16 50440000 Switch, Slide

3 - 17 *55340711 Cap, Slide Switch; C

3 - 18 50444450 Switch, Slide

3 - 19 *50939110 Band, VU Meter

3 « 20 50581380 VU Meter

3 < 21 "55003540 Plate Assy, VU Meter

3 - 22 *50419070 Sleeve, Record Lamp

3 » 23 50414580 Lamp, Bayonet Type; Record (8V)
3 - 24 50415250 Socket, Record Lamp

3 - 25 *51680653 PC Board Assy, Control Relay
3 - 26 50237160 Spacer

3 - 27 *50237131 Plate, Switch; L

3 - 28 50237141 Plate, Switch; R

3 - 29 50237121 Plate

3 ~ 30 50446580 Switch, Micro; VV-15-3A

3 a 31 50446580 Switch, Micro; VV»15-1A

3 - 32 50446570 Switch, Micro; VV-15-2A

3 » 33 50414630 Lamp, Subminiature; PAUSE
3 - 34 *50237490 Cushion, Lamp

3 - 35 *50237291 Plate Nut, Retaining

3 - 36 55340430 Hinge, A

3 . 37 55340440 Hinge, B

3 - 38 *55340720 Button, C

3 - 39 *55340730 Button, D

3 - 40 55300731 Button, REG

3 - 41 *55340740 Button, STOP; 8

3 -42 *50237262 Button Assy; PAUSE

3 » 43 50237300 Rubber Protector, P

3 - 44 *55505210 Plate Nut, Hinge; S

3 - 45 *55505200 Bracket, "Hinge; S

3 - 46 *50572060 Carbon Fiesl, 100k ohm 1/4W