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 |
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2 |
SPECIFICATIONS |
3 |
3 |
ADJUSTMENT AND CHECKS |
4 |
4 |
EXPLODED VIEW AND PARTS LIST |
6 |
5 |
PC BOARDS AND PARTS LISTS |
11 |
6 |
WIRING DIAGRAM |
19 |
7 |
INCLUDED ACCESSORIES |
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 1 .
CAUTION
USE OF CONTROLS OR ADJUSTMENT OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN HAZARDOUS RADIATION EXPOSURE.
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.
FOR U.S.A.
1
LISTED
Optical pickup:
Type |
: CMS-M95BG6 |
Manufacturer : Samsung Electro-Mechanic |
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Laser output |
: Less than 0.5 mW on the objective lens |
Wavelength |
: 760 -800 nm |
2
CD-X8/MC-DX20
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2 SPECIFICATIONS |
Amplifier Section |
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Output Power (L+R) |
5W + 5W |
Output Power Subwoofer: 15 W |
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Input Sensitivity |
300mV |
Frequency Response : |
50 to 20,000 Hz |
Tuner Section (FM) |
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Frequency Range |
87.5 MHz to 108.0 MHz |
Sensitivity (S/N30dB) |
20dBuV/m |
Tuner Section (AM) |
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Frequency Range |
520 to 1710 kHz |
Sensitivity (S/N20dB) |
54dBuV/m |
CD Player Section |
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Frequency Responce |
20 to 20,000 Hz (+/-1dB) |
Signa-to-Noise Ratio |
55 dB |
Wow and Flutter |
Unmeasurable |
SPEAKER SYSTEM Section
L & R speaker : |
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Type : |
Full range flat type |
Impedance : |
4 ohms |
Subwoofer: |
8 ohms |
Impedance : |
GENERAL
Power Requirements: |
120V AC, 60Hz - (USA/Canada model) |
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120/230V, AC,50-60 Hz (General export model) |
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Power Consumption: |
80 W |
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Dimension (W x H x D ): |
Main Unit |
160 x 226 x 86 mm |
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L & R Speaker 140 x 226 x 61mm |
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Subwoofer |
160 x 234 x 330mm |
Weight: (net) |
Main Unit |
0.96 kg |
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L & R Speaker 0.6 kg(each) |
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Subwoofer |
5.3 kg |
Standard Accessories: |
Remote Control Unit (RC-962) x 1 |
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Subwoofer Cable x 1 |
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Speaker Cable x 2 |
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FM Antenna x 1 |
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AM Antenna x 1 |
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Battery for Remote Control x 1 |
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Wall Mount Adaptor x 3 |
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Wall Mount screw x 10 |
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Tape Plastic Wall Anchor x 10 |
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Template for Wall Mounting x 1 |
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Owner s Manual x 1 |
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Warranty Card x 1 |
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Design and specifications are subject to change without notice. |
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Illustrations may differ slightly from production models. |
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Weight and dimensions are approximate. |
3 |
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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
T205
T203
L201
SVC201
T206 |
L202 |
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T204
SVC202
CD-X8/MC-DX20 MAIN(TUNER) PCB
4
CD-X8/MC-DX20
3-2-1 FM/AM alignment chart
ITEM |
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SG SETTING |
TUNER SETTING |
ADJUSTMENT POINT |
ADJUSTMENT |
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FM |
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1.IFT adjustment |
10.7 MHz |
108MHz |
T205 |
With 10.7 MHz at |
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1kHz, +/-22.5kHz dev. |
zero crossover |
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2. FM band |
87.5MHz |
87.5MHz |
L202 |
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1kHz, +/-22.5kHz dev. |
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90MHz |
90MHz |
L201 |
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1kHz, +/-22.5kHz dev. |
Adjust for max. output |
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3. Tracking |
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and best waveform. |
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106MHz |
106MHz |
SVC201 |
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1kHz, +/-22.5kHz dev. |
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Repeat step 3 |
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AM |
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1. IF adjustment |
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455kHz |
1710kHz |
T203 |
Center for max. output. |
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1kHz, 30% mod |
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2. AM band |
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520kHz |
520kHz |
T206 |
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1kHz, 30% mod |
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600kHz |
600kHz |
AM ant coil (T204) |
Adjust for max. output |
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1kHz, 30% mod |
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3. Tracking |
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and best waveform. |
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1400kHz |
1400kHz |
SVC202 |
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1kHz, 30% mod |
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Repeat step 3 |
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3-3 CD SECTION
Auto alignment.
5
CD-X8/MC-DX20
4 EXPLODED VIEWS AND PARTS LIST
EXPLODED VIEW - 1
3
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20 |
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16 |
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6
CD-X8/MC-DX20
EXPLODED VIEW-1
REF. NO |
PARTS NO. |
DESCRIPTION |
REMARKS |
1-1 |
19-50DX01500001 |
SPEAKER BOX ASSY (CD-DX8) |
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19-50DX01500020 |
SPEAKER BOX ASSY (MC-DX20B) [T/C] |
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19-50DX01500030 |
SPEAKER BOX ASSY (MC-DX20S) [EX/M] |
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1-2 |
56-07DX0155A000 |
FULL WALL PLATE-SPEAKER - (SILVER) |
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56-07DX0155B000 |
FULL WALL PLATE-SPEAKER - (BLACK) |
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1-3 |
56-78DX0151G000 |
CD DOOR CHROME RING |
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1-4 |
61-68DX01500020 |
CD ALUM COVE DIA 68MM |
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1-5 |
56-57DX01510000 |
CD DOOR LENS |
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1-6 |
57-08DX01500020 |
CD DOOR PVC PLATE |
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1-7 |
56-14DX0150A010 |
CD DOOR - (CD-X8) |
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56-14DX0150B010 |
CD DOOR - (MC-DX20B) [T/C] |
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56-14DX0150A020 |
CD DOOR - (MC-DX20S) [EX/M] |
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1-8 |
58-58DX01500620 |
RUBBER RING D5.4X3X1.5MM |
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1-9 |
20-70CMSM95B00 |
CD MECH. (SAMSUNG) CMS-M95BG6 |
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1-10 |
58-61MC23500020 |
SHOCK ABSORBER (GREY) AC112-SI-20C |
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1-11 |
58-61MC23500120 |
SHOCK ABSORBERBLACK |
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1-12 |
68-122301600400 |
FIBRE WASHER 3X6X0.4MM |
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1-13 |
56-07DX01539000 |
CD BRACKET |
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1-14 |
05-30DX01500000 |
CD(MP3) PCB ASSY (CD-X8) |
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05-30DX01510000 |
CD(MP3) PCB ASSY (MC-DX20) |
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1-15 |
48-23DX0150022A |
CLOSE SW PCB ASSY |
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1-16 |
58-58DX01500420 |
RUBBER RING D5.4X3X1MM |
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1-17 |
56-57DX01532000 |
REMOTE LENS |
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1-18 |
56-57DX01540010 |
DISPLAY LENS |
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1-19 |
56-04DX0150A010 |
FRONT CABINET - (CD-X8) |
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56-04DX0150B010 |
FRONT CABINET - (MC-DX20B) [T/C] |
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56-04DX0150A020 |
FRONT CABINET - (MC-DX20S) [EX/M] |
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1-20 |
48-23DX01500220 |
OPEN SW PCB ASSY |
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1-21 |
61-80DX01500020 |
FERRM SHAFT 155X3MM |
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1-22 |
58-43DX01500020 |
DRIVE BELT DIA 31X1MM |
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1-23 |
68-152402160300 |
PVC WASHER D4X1.6X0.3MM |
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1-24 |
56-24DX01510000 |
STRAP GEAR |
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1-25 |
56-760000000020 |
DOOR MOTOR PULLY |
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1-26 |
56-24DX01500000 |
CD DOOR GEAR |
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1-27 |
61-11DX01500320 |
MOTOR BRACKET |
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1-28 |
58-44DX01500020 |
MOTOR 3V |
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1-29 |
05-09DX01500000 |
HP/AUX JACK PCB ASSY |
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1-30 |
56-57DX01559000 |
KNOB RING-L |
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1-31 |
56-54DX0151A010 |
POWER KNOB-UNIT (SILVER) |
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56-54DX0151B010 |
POWER KNOB-UNIT (BLACK) |
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1-32 |
56-07DX01569000 |
REMOTE BRACKET |
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1-33 |
56-53DX0151A000 |
CD KNOB GROUP (SILVER) |
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56-53DX0151B000 |
CD KNOB GROUP (BLACK) |
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1-34 |
56-57DX01569000 |
KNOB RING-R |
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1-35 |
56-53DX0150A010 |
CD DOOR OPEN KNOB (SILVER) |
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56-53DX0150B010 |
CD DOOR OPEN KNOB (BLACK) |
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1-36 |
56-22DX0151B000 |
LASER COVER |
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1-37 |
05-05DX01500000 |
KEY/DISPLAY PCB ASSY |
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1-38 |
58-61EX0M108120 |
SHOCK ABSORBER - GREY |
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1-39 |
56-07DX01589000 |
RUBBER HOLDER |
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1-40 |
05-01DX01500000 |
MAIN(TUNER) PCB ASSY |
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1-41 |
56-05DX0150A020 |
REAR CABINET (SILVER) |
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56-05DX0150B010 |
REAR CABINET (BLACK) |
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7
CD-X8/MC-DX20
EXPLODED VIEW-1
REF. NO |
PARTS NO. |
DESCRIPTION |
REMARKS |
1-42 |
56-07DX0154A000 |
FULL WALL PLATE - UNIT (SILVER) |
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56-07DX0154B000 |
FULL WALL PLATE - UNIT (BLACK) |
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1-43 |
58-263102300520 |
RUBBER FOOT |
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1-44 |
13-05DX01500020 |
LCD DISPLAY |
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1-45 |
57-262392590020 |
FILTER SHEET |
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1-46 |
56-57DX01520000 |
BACK LIGHT LENS-UNIT |
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1-47 |
56-07DX01579000 |
DISPLAY BRACKET |
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1-48 |
61-11DX01500121 |
FERRM PLATE - HOLE (LOWER SIDE) |
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1-49 |
61-11DX01500021 |
FERRM PLATE - SCREW HOLE (UPPER SIDE) |
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1-50 |
66-140220160321 |
SCREW TA/BH 2X6MM |
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1-51 |
66-140526210321 |
SCREW TA/KH 2.6X10MM |
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1-52 |
66-140226180321 |
SCREW TA/BH 2.6X8MM |
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1-53 |
66-140226180321 |
SCREW TA/PH 2.6X8MM |
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1-54 |
66-140226210321 |
SCREW TA/BH 2.6X10MM |
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1-55 |
66-120320130321 |
SCREW MS/PH 2X3MM |
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1-56 |
66-120526160321 |
SCREW MS/KH 2.6X6MM |
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1-57 |
66-11DX01500420 |
FERRM PLATE (C) 33X108X2MM (LOWER SIDE) |
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1-58 |
66-11DX01500520 |
FERRM PLATE (D) 27X108X2MM (UPPER SIDE) |
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1-59 |
66-120226210321 |
SCREW MS/BH 2.6X10MM |
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8
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