TEAC MCDX-20, CDX-8 Service manual

MICRO Hi-Fi SYSTEM

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]: USA/CANADA - CD-X8/MC-DX20B

[EX/M]: S. AMERICA - MC-DX20S

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

6

11

19

21

CD-X8/MC-DX20

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.

1

FOR U.S.A.

1

Optical pickup:

Type : CMS-M95BG6

Manufacturer : Samsung Electro-Mechanic

Laser output : Less than 0.5 mW on the objective lens

Wavelength : 760 -800 nm

XXXX

R

LISTED

AUDIO PRODUCT

2

Amplifier Section

Output Power (L+R)

Output Power Subwoofer:

Input Sensitivity
Frequency Response :

Tuner Section (FM)

Frequency Range

Sensitivity (S/N30dB)

Tuner Section (AM)

Frequency Range

Sensitivity (S/N20dB)

CD Player Section

Frequency Responce

Signa-to-Noise Ratio

Wow and Flutter

CD-X8/MC-DX20

2 SPECIFICATIONS

5W + 5W

15 W

300mV
50 to 20,000 Hz

87.5 MHz to 108.0 MHz
20dBuV/m

520 to 1710 kHz

54dBuV/m

20 to 20,000 Hz (+/-1dB)

55 dB

Unmeasurable

SPEAKER SYSTEM Section

L & R speaker :
Type :

Impedance :

Subwoofer:
Impedance :

Full range flat type
4 ohms

8 ohms

GENERAL

Power Requirements:

Power Consumption:

Dimension (W x H x D ):

Weight: (net)

Standard Accessories:

120V AC, 60Hz - (USA/Canada model)

120/230V, AC,50-60 Hz (General export model)

80 W

Main Unit 160 x 226 x 86 mm

L & R Speaker 140 x 226 x 61mm

Subwoofer 160 x 234 x 330mm

Main Unit 0.96 kg

L & R Speaker 0.6 kg(each)

Subwoofer 5.3 kg

Remote Control Unit (RC-962) x 1
Subwoofer Cable x 1
Speaker Cable x 2

FM Antenna x 1
AM Antenna x 1
Battery for Remote Control x 1
Wall Mount Adaptor x 3
Wall Mount screw x 10
Tape Plastic Wall Anchor x 10
Template for Wall Mounting x 1
Owner s Manual x 1
Warranty Card x 1

Design and specifications are subject to change without notice.
Illustrations may differ slightly from production models.
Weight and dimensions are approximate.

33

CD-X8/MC-DX20

3 ADJUSTMENTS AND CHECKS

3-1 TUNER SECTION

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

3-1-1 FM adjustment

1. Set the function switch to the FM position.

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

antenna to "ANT" on MAIN PCB.

3. Connect the oscilloscope to the speaker terminal.

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

3-1-2 AM adjustment

1. Set the function switch to the AM position.

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

3. Connect the oscilloscope to the speaker terminal.

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

3-2 Adjustment and Test Points

T203

T204

T205

T206

L201

SVC201

L202

SVC202

CD-X8/MC-DX20 MAIN(TUNER) PCB

4

3-2-1 FM/AM alignment chart

CD-X8/MC-DX20

ITEM

FM

1.IFT adjustment

2. FM band

3. Tracking

AM

1. IF adjustment

SG SETTING

10.7 MHz

1kHz, +/-22.5kHz dev.

87.5MHz
1kHz, +/-22.5kHz dev.

90MHz

1kHz, +/-22.5kHz dev.

106MHz

1kHz, +/-22.5kHz dev.

Repeat step 3

455kHz

1kHz, 30% mod

TUNER SETTING

108MHz

87.5MHz

90MHz

106MHz

1710kHz

ADJUSTMENT POINT

T205

L202

L201

SVC201

T203

ADJUSTMENT

With 10.7 MHz at
zero crossover

Adjust for max. output

and best waveform.

Center for max. output.

2. AM band

3. Tracking

520kHz

1kHz, 30% mod

600kHz
1kHz, 30% mod

1400kHz

1kHz, 30% mod

Repeat step 3

3-3 CD SECTION

Auto alignment.

520kHz

600kHz

1400kHz

T206

AM ant coil (T204)

Adjust for max. output

and best waveform.

SVC202

5

CD-X8/MC-DX20

4 EXPLODED VIEWS AND PARTS LIST

3 3

EXPLODED VIEW - 1

1 1

2 2

7 7

1 1

8

42 42

16 16

19 19

15 15

17 17

6 6

5 5

4 4

12 12

11 11

9 9

12 12

1010

1010

50 50

20 20

22

16 16

23 23

22

30 30

12 12

25 25

31 31

32 32

50 50

26 26

33 33

13 13

24 24

55 55

35 35

34 34

14 14

52 52

53 53

27 27

36 36

47 47

51 51

28 28

53 53

52 52

3838

29 29

3939

53 53

37 37

52 52

4040

5959

41 41

5656

43 43

5858

48 48

54 54

54 54

43 43

5757

49 49

18 18

46 46

21 21

6

44 44

45 45

EXPLODED VIEW-1

REF. NO

1-1

1-2

PARTS NO.

19-50DX01500001
19-50DX01500020
19-50DX01500030
56-07DX0155A000
56-07DX0155B000

DESCRIPTION

SPEAKER BOX ASSY (CD-DX8)
SPEAKER BOX ASSY (MC-DX20B) [T/C]
SPEAKER BOX ASSY (MC-DX20S) [EX/M]
FULL WALL PLATE-SPEAKER - (SILVER)
FULL WALL PLATE-SPEAKER - (BLACK)

CD-X8/MC-DX20

REMARKS

1-3
1-4
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

56-78DX0151G000
61-68DX01500020
56-57DX01510000
57-08DX01500020
56-14DX0150A010
56-14DX0150B010
56-14DX0150A020

58-58DX01500620
20-70CMSM95B00
58-61MC23500020
58-61MC23500120
68-122301600400

56-07DX01539000
05-30DX01500000
05-30DX01510000

48-23DX0150022A

58-58DX01500420

56-57DX01532000
56-57DX01540010
56-04DX0150A010
56-04DX0150B010

56-04DX0150A020

48-23DX01500220
61-80DX01500020
58-43DX01500020
68-152402160300
56-24DX01510000
56-760000000020

CD DOOR CHROME RING
CD ALUM COVE DIA 68MM
CD DOOR LENS
CD DOOR PVC PLATE
CD DOOR - (CD-X8)
CD DOOR - (MC-DX20B) [T/C]
CD DOOR - (MC-DX20S) [EX/M]

RUBBER RING D5.4X3X1.5MM
CD MECH. (SAMSUNG) CMS-M95BG6
SHOCK ABSORBER (GREY) AC112-SI-20C
SHOCK ABSORBER- BLACK
FIBRE WASHER 3X6X0.4MM

CD BRACKET
CD(MP3) PCB ASSY (CD-X8)
CD(MP3) PCB ASSY (MC-DX20)

CLOSE SW PCB ASSY
RUBBER RING D5.4X3X1MM

REMOTE LENS
DISPLAY LENS
FRONT CABINET - (CD-X8)
FRONT CABINET - (MC-DX20B) [T/C]

FRONT CABINET - (MC-DX20S) [EX/M]

OPEN SW PCB ASSY
FERRM SHAFT 155X3MM
DRIVE BELT DIA 31X1MM
PVC WASHER D4X1.6X0.3MM
STRAP GEAR
DOOR MOTOR PULLY

1-26
1-27
1-28
1-29
1-30

1-31

1-32
1-33

1-34
1-35

1-36
1-37

1-38
1-39
1-40
1-41

56-24DX01500000
61-11DX01500320
58-44DX01500020
05-09DX01500000
56-57DX01559000

56-54DX0151A010
56-54DX0151B010
56-07DX01569000
56-53DX0151A000
56-53DX0151B000

56-57DX01569000
56-53DX0150A010
56-53DX0150B010
56-22DX0151B000
05-05DX01500000

58-61EX0M108120
56-07DX01589000
05-01DX01500000
56-05DX0150A020
56-05DX0150B010

CD DOOR GEAR
MOTOR BRACKET
MOTOR 3V
HP/AUX JACK PCB ASSY
KNOB RING-L

POWER KNOB-UNIT (SILVER)
POWER KNOB-UNIT (BLACK)
REMOTE BRACKET
CD KNOB GROUP (SILVER)
CD KNOB GROUP (BLACK)

KNOB RING-R
CD DOOR OPEN KNOB (SILVER)
CD DOOR OPEN KNOB (BLACK)
LASER COVER
KEY/DISPLAY PCB ASSY

SHOCK ABSORBER - GREY
RUBBER HOLDER
MAIN(TUNER) PCB ASSY
REAR CABINET (SILVER)
REAR CABINET (BLACK)

7

CD-X8/MC-DX20

EXPLODED VIEW-1

REF. NO

1-42

1-43
1-44
1-45

PARTS NO.

56-07DX0154A000
56-07DX0154B000
58-263102300520
13-05DX01500020
57-262392590020

DESCRIPTION

FULL WALL PLATE - UNIT (SILVER)
FULL WALL PLATE - UNIT (BLACK)
RUBBER FOOT
LCD DISPLAY
FILTER SHEET

REMARKS

1-46
1-47
1-48
1-49
1-50

1-51
1-52
1-53
1-54
1-55

1-56
1-57
1-58
1-59

56-57DX01520000
56-07DX01579000
61-11DX01500121
61-11DX01500021
66-140220160321

66-140526210321
66-140226180321
66-140226180321
66-140226210321
66-120320130321

66-120526160321
66-11DX01500420
66-11DX01500520
66-120226210321

BACK LIGHT LENS-UNIT
DISPLAY BRACKET
FERRM PLATE - HOLE (LOWER SIDE)
FERRM PLATE - SCREW HOLE (UPPER SIDE)
SCREW TA/BH 2X6MM

SCREW TA/KH 2.6X10MM
SCREW TA/BH 2.6X8MM
SCREW TA/PH 2.6X8MM
SCREW TA/BH 2.6X10MM
SCREW MS/PH 2X3MM

SCREW MS/KH 2.6X6MM
FERRM PLATE (C) 33X108X2MM (LOWER SIDE)
FERRM PLATE (D) 27X108X2MM (UPPER SIDE)
SCREW MS/BH 2.6X10MM

8