TEAC MCDX-25 Service manual

TEACTEAC

MC-DX25

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.

1 SPECIFICATIONS

2 ADJUSTMENT AND CHECKS

3 EXPLODED VIEW AND PARTS LIST

4 PC BOARDS AND PARTS LISTS

5 WIRING DIAGRAM

6 INCLUDED ACCESSORIES

2

3

5

8

16

18

MC-DX25

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

1 SPECIFICATIONS

5W + 5W

15 W

300mV
50 to 20,000 Hz

87.5 MHz to 108.0 MHz
20dBuV

522 to 1620 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:

AC230V, 50 Hz

80 W (standby: less than 1.4W)

Main Unit 160 x 226 x 86 mm

L & R Speaker 140 x 226 x 61mm

Subwoofer 160 x 234 x 330mm

Main Unit 1.15 kg

L & R Speaker 0.6 kg(each)

Subwoofer 5.4 kg

Remote Control Unit 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.

2

2 ADJUSTMENTS AND CHECKS

2-1 TUNER SECTION

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

2-1-1 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.

2-1-2 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.

MC-DX25

2-2 Adjustment and Test Points

T203

T204

T205

T206

L201

SVC201

L202

SVC202

MC-DX25 MAIN(TUNER) PCB

3

MC-DX25

2-2-1 FM/AM alignment chart

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

1620kHz

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

522kHz

1kHz, 30% mod

600kHz
1kHz, 30% mod

1400kHz

1kHz, 30% mod

Repeat step 3

2-3 CD SECTION

Auto alignment.

522kHz

600kHz

1400kHz

T206

AM ant coil (T204)

Adjust for max. output

and best waveform.

SVC202

4

3. EXPLODED VIEWS AND PARTS LIST

EX P LODE D VI E W - 1

MC-DX25

5

MC-DX25

EXPLODED VIEW-1

REF. NO

1-1
1-2
1-3
1-4
1-5

PARTS NO.

56-04DX0150A030
56-05DX0150A020
56-07DX01539000
56-07DX0154A000
56-07DX0155A000

DESCRIPTION

FRONT CABINET
REAR CABINET
CD BRACKET
FULL WALL PLATE-UNIT
FULL WALL PLATE-SPEAKER

REMARKS

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

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

56-14DX0150A050
56-24DX01500000
56-24DX01510000
56-53DX0150A010
56-53DX0151A000

56-54DX0151A010
56-57DX01510000
56-57DX01532000
56-57DX01540010
56-57DX01559000

56-57DX01569000
56-760000000020
56-57DX0151A000
56-07DX01569000
56-07DX01579000

56-07DX01589000
56-22DX0151B000
56-57DX01520000
57-262392590020
58-262982300020

58-43DX01500020
58-44DX01500420
58-58DX01500420

!

45-114200510008

58-61EX0M108120

CD DOOR
CD DOOR GEAR
STRAP GEAR
CD DOOR OPEN KNOB
CD KNOB

POWER KNOB-UNIT
CD DOOR LENS
REMOTE LENS
DISPLAY LENS
KNOB RING-L

KNOB RING-R
DOOR MOTOR PULLY
CD DOOR CHROME RING
REMOTE BRACKET
DISPLAY BRACKET

RUBBER HOLDER
LIGHT COVER
BACK LIGHT LENS-UNIT
FILTER SHEET
RUBBER FOOT-UNIT

DRIVE BELT DIA31X1MM
MOTOR 3V
RUBBER RING DIA5.4X3X1MM

AC CORD BS PLUG VDE APP CORD

SHOCK ABSORBER (GREY)

1-31
1-32
1-33
1-34
1-35

1-36
1-37
1-38
1-39

1-40

1-41
1-42

1-43

1-44
1-45

1-46

1-47

1-48

1-49

1-50

58-61MC23500020
58-61MC23500120
61-11DX01500021
61-11DX01500121
61-11DX01500321

61-11DX01500420
61-11DX01500520
61-68DX01500020
61-80DX01500020
66-120226210321

66-120320130321
66-120526160311
66-140220160321
66-140226180321
66-140226210321

66-140520170121
66-140326180321
66-140526210321
20-70CMSM93B000
05-01DX01500100

SHOCK ABSORBER (GREY)
SHOCK ABSORBER (BLACK)
FERRUM PLATE (SCREW HOLE)
FERRUM PLATE (HOLE)
MOTOR BRACKET

FERRUM PLATE - C
FERRUM PLATE - D
CD ALUM COVER
FERRUM SHAFT 155X3MM
MACHINE SCREW MS/BH 2.6X10MM

MACHINE SCREW MS/PH 2X3MM
MACHINE SCREW MS/KH 2.6X6MM
SELF-TAPPING SCREW TA/BH 2X6MM
SELF-TAPPING SCREW TA/BH 2.6X8MM
SELF-TAPPING SCREW TA/BH 2.6X10MM

SELF-TAPPING SCREW TA/KH 2X7MM
SELF-TAPPING SCREW TA/BH 2.6X8MM
SELF-TAPPING SCREW TA/KH2.6X10MM
CD MECHANISM
MAIN(TUNER) PCB ASSY

6

EXPLODED VIEW-1

REF. NO

1-51
1-52

1-53
1-54
1-55

PARTS NO.

05-05DX01500020
05-09DX01500010
05-30DX01510100
19-50DX25M00000
19-50DX25M00001

DESCRIPTION

KEY/DISPLAY PCB ASSY
HP/AUX PCB ASSY
CD(MP3) PCB ASSY
SPEAKER BOX UNIT-R
SPEAKER BOX UNIT-L

MC-DX25

REMARKS

1-56
1-57
1-58
1-59
1-60

1-61
1-62
1-63
1-64
1-65

1-66
1-67
1-68
1-69
1-70

1-71
1-72
1-73
1-74
1-75

1-76
1-77
1-78
1-79
1-80

56-58EX0M118000
58-262702250020
56-57DX02509000
48-16DX01500221
56-85DX0250A000

56-87DX02508000
58-263253150020
58-73DX02500020

!

18-205DX0150120
19-021153300120

41-172111000310
43-500000002020
56-22DX01508000
58-58DX01500320
61-11V600000020

61-11V820010020
61-33DX02500020
61-48DX01500020
61-48DX01500120
66-140230210321

66-141136216121
66-141430212121
66-120240212121
66-140230212121
66-140230214121

LOGO BADGE - TEAC
RUBBER FOOT SPK DIA7X2.5MM
LIGHT LENS - SUBWOOFER BOX
LED PCB ASSY
SUBWOOFER PANEL

PLASTIC TUBE
RUBBER FOOT DIA 25MM
SUBWOOFER BOX
H/TRANSFORMER EI66 230V/50HZ
SPEAKER 8 OHM / 5W

SWITCH

AC CORD BUSHING
PCB COVER
CUSHION 106X40X1MM
PCB BRACKET

PCB FIX BRACKET - B
SUB. REAR PANEL
HEATSINK - A
HEATSINK - B
SELF-TAPPING SCREW TA/BH 3X10MM

SELF-TAPPING SCREW TA/RH 3.6X16MM(BLK)
SELF-TAPPING SCREW TA/BWH 3X12MM(BLK)
MACHINE SCREW MS/BH4X12MM (BLK)
SELF-TAPPING SCREW TA/BH 3X12MM (BLK)
SELF-TAPPING SCREW TA/BH 3X14MM (BLK)

1-81
1-82
1-83
1-84
1-85

1-86
1-87
1-88
1-89
1-90

1-91
1-92
1-93
1-94

66-150230180123
66-120230160121
67-021400000020
68-112403101000
05-03DX01500000

05-07DX01500010
05-08DX01500010
56-43DX0150A000
56-43DX01518000
56-44DX01508000

57-33DX01500220
05-13DX01500000
48-23DX0150022A
48-23DX01500220

HARDEN SCREW TTB 3X8MM AB (BLK)
MACHINE SCREW MS/BH 3X6MM (BLK)
NUT M4MM
METAL WASHER 4X10X1MM
STANDBY PCB ASSY

SUBWOOFER POWER PCB ASSY
RCA/D-S JACK PCB ASSY
REMOTE FRONT CABINET
REMOTE REAR CABINET
REMOTE BATTERY DOOR

REMOTE PLATE (TEAC-RC970)
REMOTE PCB ASSY
CLOSE SW PCB ASSY
OPEN SW PCB ASSY

7

MC-DX25

MAIN (TUNER)PCB ASSY

REF. NO

BT201
CF201,204
CF203

PARTS NO.

05-01DX01500100

48-01DX01500224
31-058880000110
31-028107000120
31-026450010110

4 PC BOARDS AND PARTS LIST

DESCRIPTION

MAIN(TUNER) PCB ASSY
MAIN(TUNER) PCB
BAND PASS FILTER #GFMB3-SE
FILTER LT10.7MA5
FILTER SFU450B

REMARKS

CF205
CF206
CN1
CN201,504
CN203

CN501,505A,702
CN503
CN505B
CN703
D8

D201-204,705
D601,602,708
IC202
IC203
IC204

IC501
IC702
IC703
JK201
L204

L205,404,406
L206, R241
L701
L702
Q201-203,501,502,
Q705,706,715

31-038107020120
31-046456000220

43-462103003320

43-012200180120

43-022250120120

43-012200130120
43-012200150120

43-012200140120

43-012250120120
12-1N5822000021

12-1N4148000021
12-1N4001000021
16-LA1832000021
16-LC7213100021
16-BU1924F00021

16-LC7534200021
16-MC34063A0021
16-SC1308000021

43-421000003210
38-014100050020

38-013100050220
38-013100050120
38-104230050020
38-103200050020
11-9014C0000021

FILTER JT10.7MG46-A
RESONATOR ZTB456F15
D-S TERMINAL #DSW-31

WAFER 2MM 8 PIN
WAFER 2.5MM 2PIN

WAFER 2MM 3 PIN
WAFER 2MM 5 PIN
WAFER 2MM 4 PIN
WAFER 2.5MM 2PIN

RECTIFIER DIODE 1N5822

DIODE 1N4148
DIODE 1N4001
IC - LA1832
IC - LC72131
IC - BU1924F

IC - LC75342
IC - MC34063A
IC - SC1308-01
COAXIAL JACK IF-01A

AXIAL INDUCTOR 100UH

AXIAL INDUCTOR 10UH #EC-36

AXIAL INDUCTOR 10UH #EC24
CHOKE COIL 230UH
CHOKE COIL 20UH
TR - 9014C

Q204,207,701
Q205
Q401,208,716
Q703
Q704

Q712,713
RF201
SVC202
T203
T204

T206

VD203,204
X201
X202
ZD202

ZD401
ZD701
ZD702

8

11-9015C0000021
11-9018F0000021
11-8050C0000021
11-KSD882Y00021
11-KSB772YS0021

11-8550C0000021
37-09A150000020
27-501802201020

40-02A049004020
40-023120000020

40-02660R002020
12-SVC321SPA021
31-017450002030
31-017433202020
12-011620320121

12-011470320121
12-012110320121
12-011910320121

TR - 9015C

TR - 9018F

TR - 8050C

TR - KSD882Y

TR - KSB772SY

TR - 8550C
TUNER #FE450-G11
TRIMMER 20PF
IFT 7MM A049 - YELLOW
IFT 7MM 312A - BLACK

IFT 7MM 660R - RED

VARICAP DIODE SVC321SPA
CRYSTAL 4.5 MHZ
CRYSTAL 4.332MHZ

ZENER DIODE 6.2V

ZENER DIODE 4.7V

ZENER DIODE 11V
ZENER DIODE 9.1V