Teac 10 XD Service Manual

Page 2

CONTENTS

1. Introduction . .
1.1 General ............

1.2 Removing the top panel . .
1.3 Replacing the top panel

1.4- Threading the tape .............................. 3
2. Maintenance .................................. 4
2.1 Cleaning Lhe tape path ........................... 4
2.2 Lubrication ................................... 4
3. Mechanical checks and adjustments ................. 5
3.1 Checking the braking force ....................... 5
3.2 Checking the clearance on the brake arm ............ 5
3.3 Adjusting the braking force ....................... 6
3.4 The brake solenoid ............................. 6
3.5 The pinch roller solenoid . ............... 7

3.6 The pinch roller .......................... 7
3.7 The reel motors . 7
3.8 The tape tension arms . . . 8
3.9 The photo-electric sensors ............... 9
3.10 The thrust bearings ............................. 9
4. Changing and adjusting the heads .................. l0
5. Changng lamps ................................ 10
5.1 Changing mode button lamps ..................... 10
5.2 Changing the photoelectric stop lamp ............... 10
6. Changing the power supply transformer tappings ...... 11
7. Electrical circuits .............................. 12
7.] Motor ....................................... 12
7.2 Oscillator ..................................... 14
7.3 Checking the record response curve ................. 14
7.4 Checking the playback response curve ............... 15
7.5 Changing from NAB correction to [EC
correction, 2 track .............................. 16
8. Electrical adjustments ........................... 18
Block diagram ................................. 20
High level in STOP, on function control logic and sensor. 21
Circuit diagrams and printed boards ................ 22
Modifications .............................. . 3 1
Main board Circllilfliugram. l-rom serial No. 237245 . . . 32

Function control logic circuit. From serial No. 2372800. 34

Page 24

AI2 FUNCTION CONTROL

n-v m m m a, m w

[J
XXW

W

LOGIC

«5mm

Fig. 8.2 A12 and A 14, fimctior

Red dots indicate high level in STOP.

* STOP from WIND
** STOP from PLAY

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30

A13 MOTOR CONTROL