TEAC LT-1 Service manual

LT-1/LT-1B

CD / RADIO

WITH REMOTE CONTROL

PC board shown are viewed from parts side.

The parts with no reference number or no parts number

in the exploded views are not supplied.

As regards the resistors and capacitors, refer to the

circuit diagrams contained in this manual.

!

Parts marked with this sign are safety critical

components. they must be replaced with identical

components - refer to the appropriate parts list and

ensure exact replacement.

Parts of [ ] mark can be used only with the version designated.

[T/C]: UL/CSA (LT-1) [EX/T]: UNI (LT-1)

[EUR]: VDE (LT-1B)

1 SAFETY INFORMATION

2 SPECIFICATIONS

3 ADJUSTMENT AND CHECKS

4 EXPLODED VIEW AND PARTS LIST

5 PC BOARDS AND PARTS LISTS

6 WIRING DIAGRAM

7 INCLUDED ACCESSORIES

2

3

4

7

12

22

24

LT-1/LT-1B

1 SAFETY INFORMATION

SAFETY INFORMATION

This product has been designed and manufactured according to FDA regulations " title 21, CFR, chapter 1,subchapter J,based on

The Radiation Control for Health and Safety Act of 1968" and is classified as class 1 laser product. There is not hazardous

invisible laser radiation during operation because invisible laser radiation emitted inside of this product is completely confined

in the protective housings. The label required in this regulation is shown .

CAUTION

USE OF CONTROLS OR ADJUSTMENT OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY

HAZARDOUS RADIATION EXPOSURE.RESULT IN

DO NOT REMOVE THE PROTECTIVE HOUSING USING SCREWDRIVER. IF THIS PRODUCT DEVELOPS TROUBLE, MAKE A CONTACT WITH OUR SERICEMAN, AND DO NOT USE THE PRODUCT A TROUBLED

STATE.

CAUTION

RISK OF ELECTRIC SHOCK

DO NOT OPEN

!

: RISQUE DE CHOC ELECTRIQUE

AVIS

NE PAS OUVRIR.

THIS DEVICE COMPLIES WITH PART 15 OF THE

FM ANT

FCC RULES. OPERATION IS SUBJECT TO THE FOLLOWING TWO CONDITIONS:(1) THIS DEVICE MAY NOT CAUSE HARMFUL INTERFERENCE,AND (2) THIS DEVICE MUST ACCEPT ANY INTERFER-

ENCE RECEIVED, INCLUDING INTERFERENCE THAT MAY CAUSE UNDESIRED OPERATION.

THIS CLASS B DIGITAL APPARATUS COMPLIES WITH CANADIAN ICES-003. CET APPAREIL NUMERIQUE DE LA CLASS B. EST CONFORM A LA NORME NMB-003 DU CANADA.

MODEL NO . LT-1

CD RADIO WITH REMOTE CONTROL

TEAC CORPORATION

SERIAL NO. LABEL

MADE IN CHINA

40W120V 60Hz

CERTIFICATION

THIS PRODUCT COMPLIES WITH DHHS RULES 21 CFR SUBCHAPTER J APPLICABLE AT DATE OF MANUFACTURE.

TEAC CORPORATION

3-7-3, NAKA-CHO, MUSASHINO-SHI, TOKYO, JAPAN

MANUFACTURED : LTC

1

FOR U.S.A.

1

CERTIFICATION

THIS PRODUCT COMPLIES WITH DHHS RULES 21 CFR SUBCHAPTER J APPLICABLE AT DATE OF MANUFACTURE.

TEAC CORPORATION

3-7-3, NAKA-CHO, MUSASHINO-SHI, TOKYO, JAPAN

MANUFACTURED : LTC

SERIAL

NO.

Optical pickup:

Type : KSM-213CDM

Manufacturer : SONY Corporation

Laser output : Less than 0.5 mW on the objective lens

Wavelength : 770 -795 nm

2

TUNER Section

Frequency Range (FM):

Frequency Range (AM):

87.5MHz to 108.00 MHz (100kHz step) - U.S.A

87.5MHz to 108.00 MHz (50kHz step) - EUR

520kHz to 1710 kHz (10kHz step) - U.S.A

522kHz to 1620 kHz (9kHz step) - EUR

CD PLAYER Section

Frequency Response:

Wow and Flutter:

20 Hz to 20 kHz (+/- 1dB)

Unmeasurable

SPEAKER SYSTEM Section

Type:

Impedance:

1-way

8 ohms (L & R) 8 ohms (subwoofer)

LT-1/LT-1B

2 SPECIFICATIONS

GENERAL

Power Requirements:

Power Consumption:

Total Output Power :

Dimension (W x H x D ):

Weight:

Standard Accessories:

Design and specifications are subject to change without notice.

Illustrations may differ slightly from production models.

120V AC,60Hz (U.S.A/Canada Model)

120/230V AC,50-60Hz (General Export Model)

230V AC,50Hz (EUR)

40 W

15 W

357 x 205 x 247.5 mm (14-1/18 x 8-1/16 x 9-3/4) inches

5.8 kg (12-13/16 lb)

,

Owner s Manual x 1 Warranty Card x 1 Remote Control (RC-910) x 1

3

LT-1/LT-1B

3 ADJUSTMENTS AND CHECKS

3-1 TUNER SECTION

Use a screwdriver with a plastic or ceramic grip for all adjustment.

3-1-1 AM adjustment

1. Set the function switch to the TUNER position.

2. Set the BAND switch to the AM position.

2. Connect the test loop antenna across the output of the signal generator.

3. Connect the oscilloscope to the PHONE JACK terminal.

4. Set the signal generator as listed in the alignment chart.

3-1-2 FM adjustment

1. Set the function switch to the TUNER position.

2. Set the BAND switch to the FM position.

3. Connect the signal generator output through a 75 ohm dummy

antenna to "ANT" on TUNER PCB.CN8.

3. Connect the oscilloscope to the PHONE JACK terminal.

4. Set the signal generator as listed in the alignment chart.

3-2 Adjustment and Test Points

TC1

L4

CN8

L3 AM ANT COIL

L5

TUNER

Fig. 3-2-1

LT-1 TUNER PCB

4

3-2-2 AM Tuner

LT-1/LT-1B

ITEM

AM

1. VOLTAGE adjustment

2. IFT adjustment

3. ANT COIL adjustment

4. TC1

adjustment

SG SETTING

450kHz

1kHz, 30% mod

600kHz (USA)

603kHz (EUR) 1kHz, 30% mod

1400kHz (USA)

1404kHz (EUR) 1kHz, 30% mod

Repeat step 3

TUNER SETTING

1710kHz (USA)

1620kHz (EUR)

520kHz (USA)

522kHz (EUR)

600kHz (USA)

603kHz (EUR)

600kHz

1400kHz

ADJUSTMENT POINT

L4

Check

L5

L3

AM ant coil

TC1 repeat srep 3

and 4

ADJUSTMENT

VT

8.0V

VT

1.5V

Adjust for max.output.

Adjust for max. output.

Adjust for max. output

and best waveform.

AM Signal Generator

60 cm

AM

LT-1

PHONES

AC Voltmeter

1 k ohm

AM Loop

Antenna

Fig. 3-2-3

5

LT-1/LT-1B

3-2-4 FM Tuner

ITEM

FM

1. VOLTAGE adjustment

FM Signal Generator

SG SETTING

75 ohm

Fig. 3-2-5

TUNER SETTING

106.1MHz

FM

90.1MHz

LT-1

PHONES

ADJUSTMENT POINT

Check

1 k ohm

ADJUSTMENT

VT

5.5-5.9V

VT

1.2-1.6V

AC Voltmeter

6

4 EXPLODED VIEWS AND PARTS LIST

EXPLODED VIEW - 1

31

LT-1/LT-1B

28

27

1

2

9

31

8

7

12

13

11

12

10

3

31

4

14

13

12

30

5

26

6

29

23

24

29

33

11

12

8

7

31

16

17

25

34

23

34

21

32

15

19

20

18

17

22

7

LT-1/LT-1B

EXPLODED VIEW-1

REF. NO

1-1

1-2 1-3 1-4

PARTS NO.

100-0LT12100 100-LT1B1010 011-SD900100 011-0LT10100 100-0LT02000 100-LT1B1000

DESCRIPTION

CD PCB ASSY [T/C], [EX/T] CD PCB ASSY [EUR] CD PCB SHIELD PLATE HEAT SINK BKT MAIN PCB ASSY [T/C], [EX/T] MAIN PCB ASSY [EUR]

REMARKS

1-5 1-6

1-7 1-8

1-9 1-10

1-11 1-12 1-13

1-14 1-15 1-16 1-17 1-18

1-19

1-20 1-21 1-22

1-23 1-24

1-25

011-0LT10200 100-0LT12020 100-LT1B1020 061-0LT10800 035-SD900082

010-0LT10100 010-0LT10200 035-00LT1042 035-SLD90052 099-39SLD902

010-0LT10300 061-0LT10801 035-00LT1052 035-SLD90032 035-SLD90022

099-39SLD901 044-SLD90040

!

010-SD900600 001-0LT10100 001-0LT10300

011-SD900401

!

084-SD900200

!

084-SD900100

!

084-SD900700

!

087-00000007

!

087-00000027

!

087-00000001

TUNER PCB SHIELD PLATE TUNER PCB ASSY [T/C], [EX/T] TUNER PCB ASSY [EUR] SPEAKER 2 INCHES 8 OHM R/L SPEAKER EVA WASHER

LEFT SPEAKER BOX COVER RIGHT SPEAKER BOX COVER EVA SHEET (G) EVA SHEET (D) ABSORB COTTON-C

WOODEN BOX SPEAKER 3 INCHES 8 OHM WOOFER SPEAKER EVA WASHER EVA SHEET (B) EVA SHEET (A)

ABSORB COTTON - A SPEAKER PAPER TUBE (BOTTOM) CORD STOP BOTTOM CABINET [T/C] , [EUR] BOTTOM CABINET [EX/T]

TRANSFORMER BKT TRANSFORMER UL 120V/60HZ [T/C] TRANSFORMER VDS 230V/50HZ [EUR] TRANSFORMER 120/ 230 [EX/T] AC CORD UL [T/C] AC CORD UL [EX/T] AC CORD UL [EUR]

1-26

1-27 1-28 1-29

1-30 1-31 1-32

1-33

1-34

8

023-13006032 021-13008032 022-23008033 024-43010033

021-13010032 021-23014033 021-44010032 021-44015032 021-44185032

SCREW 3x6MM PB ZMC SCREW 3x8MM PT ZMC SCREW 3x8MM BM BLK SCREW 3X10MM PWA BLK

SCREW 3x10MM PT ZMC SCREW 3X14MM BT BLK SCREW 4x10MM PWT ZMC SCREW 4x15MM PWT ZMC SCREW 4x18MM PWT ZMC

LT-1/LT-1B

EXPLODED VIEW - 2

16

68

2

1

3

5

4

7

6

65

8

60

9

63

10

72

11

66

12

13

63

14

18

59

19

26

69

22

20

23

15

27

60

21

63

11

73

68

37

12

29

30

31

13

60

59

24

25

33

34

17

32

57

60

28

56

48

45

46

68

47

27

61

47

49

47

38

70

50

66

51

60

64

71

44

65

68

69

36

41

43

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39

40

62

58

42

5

68

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9