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TEAC
CD-X9
MICRO Hi-Fi SYSTEM
1 SAFETY INFORMATION 2
PC board shown are viewed from parts side.
The parts with no reference number or no parts number 2 SPECIFICATIONS 3
in the exploded views are not supplied. 3 ADJUSTMENT AND CHECKS 4
As regards the resistors and capacitors, refer to the
4 EXPLODED VIEW AND PARTS LIST 6
circuit diagrams contained in this manual.
! Parts marked with this sign are safety critical 5 PC BOARDS AND PARTS LISTS 9
components. they must be replaced with identical 6 WIRING DIAGRAM 17
components - refer to the appropriate parts list and
7 INCLUDED ACCESSORIES 19
ensure exact replacement.
Parts of [ ] mark can be used only with the version designated.
CD-X9
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.
1 FOR U.S.A.
Optical pickup:
Type : CMS-M93BG6U
Manufacturer : Samsung Electro-Mechanic
Laser output : Less than 0.5 mW on the objective lens
Wavelength : 760 - 800 nm
2
CD-X9
2 SPECIFICATIONS
Amplifier Section
Output Power (L+R) 5W + 5W
Output Power Subwoofer: 15 W
Input Sensitivity 300mV
Frequency Response : 50 to 20,000 Hz
Tuner Section (FM)
Frequency Range 87.5 MHz to 108.0 MHz
Sensitivity (S/N30dB) 20dBuV
Tuner Section (AM)
Frequency Range 520 to 1710 kHz
Sensitivity (S/N20dB) 54dBuV/m
CD Player Section
Frequency Responce 20 to 20,000 Hz (+/-1dB)
Signa-to-Noise Ratio 55 dB
Wow and Flutter Unmeasurable
SPEAKER SYSTEM Section
L & R speaker :
Type : Full range flat type
Impedance : 4 ohms
Subwoofer:
Impedance : 8 ohms
GENERAL
Power Requirements: 120V AC,60Hz
Power Consumption: 80 W
Dimension (W x H x D ): Main Unit 160 x 226 x 86 mm
L & R Speaker 142 x 226 x 70mm
Subwoofer 160 x 245 x 335mm
Weight: (net) Main Unit 1.0 kg
L & R Speaker 0.6 kg(each)
Subwoofer 5.3 kg
Standard Accessories: Remote Control Unit (RC-1045) x 1
Subwoofer Cable x 1
Speaker Cable x 2
FM Antenna x 1
AM Antenna x 1
Battery for Remote Control Unit x 1
Wall Mount Adaptor x 3
Wall Mount screw x 10
Tapered Plastic Wall Anchor x 10
Template for Wall Mounting x 1
Stereo mini plug cable 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.
3
CD-X9
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
T204
SVC202
CD-X9 MAIN(TUNER) PCB
4
CD-X9
3-2-1 FM/AM alignment chart
ITEM SG SETTING TUNER SETTING ADJUSTMENT POINT ADJUSTMENT
FM
10.7 MHz 108MHz With 10.7 MHz at
1.IFT adjustment T205
1kHz, +/-22.5kHz dev. zero crossover
87.5MHz
2. FM band 87.5MHz L202
1kHz, +/-22.5kHz dev.
90MHz
1kHz, +/-22.5kHz dev. 90MHz L201
Adjust for max. output
3. Tracking and best waveform.
106MHz
106MHz SVC201
1kHz, +/-22.5kHz dev.
Repeat step 3
AM
455kHz
1. IF adjustment 1710kHz T203 Center for max. output.
1kHz, 30% mod
520kHz
2. AM band 520kHz T206
1kHz, 30% mod
600kHz 600kHz AM ant coil (T204)
1kHz, 30% mod Adjust for max. output
3. Tracking and best waveform.
1400kHz 1400kHz SVC202
1kHz, 30% mod
Repeat step 3
3-3 CD SECTION
Auto alignment.
5
CX-D9
4 EXPLODED VIEWS AND PARTS LIST
EXPLODED VIEW - 1
6
CD-X9
EXPLODED VIEW-1
REF. NO PARTS NO. DESCRIPTION REMARKS
1-1 56-04CDX090A010 FRONT CABINET
1-2 56-05CDX0908010 REAR CABINET
1-3 56-07CDX0909000 CD BRACKET
1-4 56-07CDX0919000 DISPLAY BRACKET
1-5 56-07CDX0928000 LIGHT BRACKET
1-6 56-14CDX090A010 CD DOOR
1-7 56-24DX01500000 CD DOOR GEAR
1-8 56-24DX01510000 STRAP GEAR
1-9 56-53CDX090A000 CD KNOB GROUP/L
1-10 56-53CDX091A010 CD KNOB GROUP/M
1-11 56-53CDX0948000 STANDBY KNOB CHROME RING
1-12 56-54CDX092A000 CD KNOB GROUP/R
1-13 56-57CDX0900000 CD DOOR LENS
1-14 56-57CDX0910020 DISPLAY LENS
1-15 56-57CDX0929000 KNOB RING
1-16 56-57CDX0940000 BACK LIGHT LENS - UNIT
1-17 56-760000000020 DOOR MOTOR PULLY
1-18 56-78CDX090G000 SAFEUARD RING
1-19 56-78CDX091G000 CD DOOR CHROME RING
1-20 57-08CDX0900020 PVC PLATE - A
1-21 57-08CDX0900120 PVC PLATE - B
1-22 57-08CDX0900220 CD DOOR PVC PLATE
1-23 57-26CDX0900020 FILTER SHEET - 112.4X26.5X0.2MM
1-24 58-262982400020 RUBBER FOOT DAI 9.8X4MM
1-25 58-43DX01500020 DRIVE BELT DIA 31X1MM
1-26 58-44DX01500020 MOTOR 3V
1-27 58-58DX01500420 RUBBER DIA 5.4X3X1MM
1-28 58-61EX0M108120 SHOCK ABSORBER (GREY)
1-29 58-61MC23500020 SHOCK ABSORBER (GREY)
1-30 58-61MC23500120 SHOCK ABSORBER (BLACK)
1-31 61-11DX01500021 FERRUM PLATE (SCREW HOLE)
1-32 61-11DX01500121 FERRUM PLATE (HOLE)
1-33 61-11DX01500321 MOTOR BRACKET
1-34 61-11DX01500420 FERRUM PLATE - C
1-35 61-11DX01500520 FERRUM PLATE - D
1-36 61-11DX01500620 D.S. PLATE
1-37 61-68CDX0900020 CD ALUM COVER
1-38 61-80DX01500020 FERRUM SHAFT 155X3MM
1-39 66-120226210321 MACHINE SCREW MS/BH 2.6X10MM
1-40 66-120320130321 MACHINE SCREW MS/PH 2X3MM
7
CD-X9
EXPLODED VIEW-1
REF. NO PARTS NO. DESCRIPTION REMARKS
1-41 66-120526160311 MACHINE SCREW MS/KH 2.6X6MM
1-42 66-140220160321 SELF-TAPPING SCREW TA/BH 2X6MM
1-43 66-140226180321 SELF-TAPPING SCREW TA/BH 2.6X8MM
1-44 66-140226210121 SELF-TAPPING SCREW TA/BH 2.6X10MM (BLK)
1-45 66-140230210121 SELF-TAPPING SCREW TA/BH 3X10MM (BLK)
1-46 66-140326180321 SELF-TAPPING SCREW TA/PH 2.6X8MM
1-47 66-140526180121 SELF-TAPPING SCREW TA/KH 2.6X8MM (BLK)
1-48 66-140526210121 SELF-TAPPING SCREW TA/KH 2.6X10MM (BLK)
1-49 66-140526210321 SELF-TAPPING SCREW TA/KH 2.6X10MM
1-50 20-70CMSM93B000 CD MECHANISM
1-51 05-01DX01500000 MAIN(TUNER) PCB ASSY
1-52 05-05CDX0900000 KEY/DISPLAY PCB ASSY
1-53 05-09CDX0900000 HP/AUX PCB ASSY
1-54 05-30CDX9M00000 CD(MP3) PCB ASSY
1-55 05-07DX01500000 SUB.POWER(AMP) PCB ASSY
1-56 05-08DX01500000 RCA/D-S JACK PCB ASSY
1-57 48-16DX01500221 LED PCB
1-58 56-22CDX0908000 PCB BRACKET
1-59 56-57CDX0936000 LIGHT LENS - SUBWOOFER BOX
1-60 56-78CDX092G000 CHROME RING - SUBWOOFER BOX
1-61 56-78CDX0938000 SAFEGUARD RING/SUB
1-62 56-85CDX090A010 SUBWOOFER PANEL
1-63 56-87CDX0908000 PLASTIC TUBE
1-64 58-263253150020 RUBBER FOOT DIA 25MM
1-65 58-58DX01500320 CUSHION 106X40X1MM
1-66 58-73CDX0900020 SUBWOOFER BOX
1-67 61-11V600000020 PCB BRACKET
1-68 61-11V820010020 PCB FIX BRACKET - B
1-69 61-33CDX0900020 SUB. REAR PANEL
1-70 61-48DX01500020 HEATSINK - A
1-71 66-120230160121 MACHINE SCREW MS/BH 3X6MM (BLK)
1-72 66-120240212121 MACHINE SCREW MS/BH 4X12MM (BLK)
1-73 66-140230210321 SELF-TAPPING SCREW TA/BH 3X10MM
1-74 66-140230212121 SELF-TAPPING SCREW TA/BH 3X12MM (BLK)
1-75 66-140230214121 SELF-TAPPING SCREW TA/BH 3X14MM (BLK)
1-76 66-141430212121 SCREW TA/BWH 3X12MM (HEAD 10MM)
1-77 66-150230180123 HARDEN SCREW TTB 3X8MM AB (BLK)
1-78 67-021400000020 NUT M4MM
1-79 68-112403101000 METAL WASHER 4X10X1MM
1-80 ! 18-203DX0150120 H/TRANSFORMER EI66
1-81 41-172111000310 SWITCH
1-82 43-500000002020 AC CORD BUSHING
1-83 ! 45-114180310061 AC CORD CUL APP 6FT
1-84 48-23DX0150022A CLOSE SW PCB ASSY
1-85 48-23DX0150022 OPEN SW PCB ASSY
8
CD-X9
5 PC BOARDS AND PARTS LIST
MAIN (TUNER)PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
05-01DX01500000 MAIN(TUNER) PCB ASSY
48-01DX01500224 MAIN(TUNER) PCB
CF201 31-028107000120 FILTER LT10.7MA5
CF203 31-026450010110 FILTER SFU450B
CF205 31-038107020120 FILTER JT10.7MG46-A
CF206 31-046456000220 RESONATOR ZTB456F15
CN201 43-012200160120 WAFER 2MM 6PIN
CN203 43-022250120120 WAFER 2.5MM 2PIN
CN501,505A,702 43-012200130120 WAFER 2MM 3 PIN
CN1 43-462103003320 D-S TERMINAL #DSW-31
CN505B 43-012200140120 WAFER 2MM 4 PIN
CN503 43-012200150120 WAFER 2MM 5 PIN
CN504 43-012200180120 WAFER 2MM 8 PIN
CN703 43-012250120120 WAFER 2.5MM 2 PIN
D8 ! 12-1N5822000021 RECTIFIER DIODE 1N5822
D201,202,705 12-1N4148000021 DIODE 1N4148
D708 12-1N4001000021 DIODE 1N4001
IC201 16-TA8176SN0021 IC - TA8176SN
IC202 16-LA1832000021 IC - LA1832
IC203 16-LC7213100021 IC - LC72131
IC501 16-LC7534200021 IC - LC75342
IC702 16-MC34063A0021 IC - MC34063A
IC703 16-SC1308000021 IC - SC1308-01
JK201 43-421000003120 COAXIAL JACK IF-01
L201,203 40-351500135020 FM COIL 5X3.5TX0.8MM
L202 40-351500125020 FM COIL 5X2.5TX0.8MM
L204 38-014100050020 AXIAL INDUCTOR 100UH
L404,406 38-013100050220 AXIAL INDUCTOR 10UH-EC-36
L701 38-104230050020 CHOKE COIL 230UH
L702 38-103200050020 CHOKE COIL 20UH
Q201-203,501,502,11-9014C0000021 TR - 9014C
Q705,706,715
Q204,701 11-9015C0000021 TR - 9015C
Q208,401,716 11-8050C0000021 TR - 8050C
Q702 16-LM78L05A0021 IC - LM78L05A
Q704 11-KSB772YS0021 TR - KSB772SY
Q703 11-KSD882Y00021 TR - KSD882Y
Q712,713 11-8550C0000021 TR - 8550C
R241 38-013100050120 AXIAL INDUCTOR 10UH-EC-24
SVC201,202 27-501802201020 TRIMMER 20PF
T203 40-02A049004020 IFT 7MM A049 - YELLOW
T204 40-023120000020 IFT 7MM 312A - BLACK
T205 40-027400003120 IFT 7MM 740 - ORANGE
T206 40-02660R002020 IFT 7MM 660R - RED
VD201,202 12-SVC201SPA021 VARICAP DIODE SVC201SPA
VD203,204 12-SVC321SPA021 VARICAP DIODE SVC321SPA
X201 31-017450002030 CRYSTAL 4.5 MHZ
ZD202 12-011620320121 ZENER DIODE 6.2W
ZD401 12-011470320121 ZENER DIODE 4.7V
ZD701 12-012110320121 ZENER DIODE 11V
ZD702 12-011910320121 ZENER DIODE 9.1V
9
CD-X9
MAIN(TUNER) PCB
IC703
10
CD-X9
CD(MP3) PCB ASSY - TOP
REF. NO PARTS NO. DESCRIPTION REMARKS
05-30CDX9M00000 CD(MP3) PCB ASSY
48-30DX01500322 CD(MP3) PCB
IC2 16-S1L9226X0021 IC - S1L9226X01
IC4 16-S5L927900021 IC - S5L9279X01
IC7 16-S3C825AC0021 IC - S3C825AC51
IC8 16-M12L16160021 IC - SDRAM-M12L16161A
IC9 16-KA9259D00021 IC - KA9259D
CD(MP3) PCB ASSY - BOTTOM
REF. NO PARTS NO. DESCRIPTION REMARKS
CN2 43-022100216020 F.F.C WAFER 1MM 16 PIN
CN3 43-012150160320 WAFER 1.5MM 6 PIN
CN4 43-022200120120 WAFER 2MM 2 PIN
CN5,9 43-022200130120 WAFER 2MM 3 PIN
C56 ! 26-017220650121 E.CAP 2200UF/10V
D1-5,9,10,55,56, 12-1N4148000021 DIODE 1N4148
D66,67,71-73,80
D6,8,12 12-011390320111 ZENER DIODE 3.9V
D7 ! 12-1N5819000021 RECTIFIER DIODE 1N5819
L1,2,3 38-013100050020 AXIAL INDUCTOR 10UH
Q1,7,9,10 11-9015C0000021 TR - 9015C
Q2,3,4,8 11-9014C0000021 TR - 9014C
Q5 11-8550C0000021 TR - 8550C
X1 31-018169302220 CRYSTAL 16.9344MHZ.
X2 31-015320003310 CRYSTAL 32.768KHZ
X3 31-017800002120 CRYSTAL 8.000MHZ
11
CD-X9
CD(MP3) PCB - TOP
CD(MP3) PCB - BOTTOM
12
CD-X9
SUBWOOFER POWER PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
05-07DX01500000 SUBWOOFER POWER PCB ASSY
48-07DX01500123 SUBWOOFER POWER PCB
CN1 43-012250130120 WAFER 2.5MM 3 PIN
CN2 43-012200190120 WAFER 2MM 9 PIN
CN4 43-012250150120 WAFER 2.5MM 5 PIN
CN5 43-012250140120 WAFER 2.5MM 4 PIN
CN6 43-012250120120 WAFER 2.5MM 2 PIN
C406 ! 26-017470950111 E.CAP - 4700UF/35V
C701 ! 26-017470850121 E.CAP - 4700UF/25V
C718,719 ! 26-017100750121 E.CAP - 1000UF/16V
D401-404 ! 12-1N5401000021 RECTIFIER DIODE 1N5401
D701-704 ! 12-RL2020000021 RECTIFIER DIODE RL-202
D705,707 12-1N4148000021 DIODE 1N4148
D706 12-1N4001000021 RECTIFIER DIODE 1N4001
FU2,3 ! 46-055350200010 GLASS FUSE 3.5A/125V
FU4 ! 46-055400200010 GLASS FUSE T4A/125V
Q301,709 11-9014C0000021 TR - 9014C
Q707,708,710 11-2SD1936T0021 TR - 2SD1936T
U1 16-TA8216H00021 IC - TA8216H
U2 16-BA4558N00021 IC - BA4558N
U3 16-BA5417000021 IC - BA5417
ZD1,2 12-011910320121 ZENER DIODE 9.1V
RCA/D-S JACK PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
05-08DX01500000 RCA/D-S JACK PCB ASSY
48-08DX01500220 RCA/D-S PCB
CN801 43-462103003320 D-S TERMINAL #DSW-31
SPK 43-451200006120 H/RCA JACK 2PIN
13
CD-X9
SUBWOOFER POWER PCB
RCA/D-S JACK PCB
14
CD-X9
KEY / DISPLAY PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
05-05CDX0900000 KEY/DISPLAY PCB ASSY
48-05CDX0900120 KEY/DISPLAY PCB
LCD 13-05CDX0900020 LCD DISPLAY KPS-M0315-TB-1
LED3,4 13-011200122020 LED D2X5X7MM - WHITE
LED1,2 13-011206122020 LED D2X5X7MM - BLUE
Q707 11-9015C0000021 TR - 9015C
REM 17-05FM60380011 OPTIC SENSER FM-6038TM2-5A
SW1-13 41-150010030020 TACH SW 6x6mm 4 LEGS
HP/AUX JACK PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
05-09CDX0900000 HP/AUX PCB ASSY
48-09CDX0900120 HP/AUX PCB
AUX 43-431355000020 PHONE JACK D3.55MM TC-38-010-01
HEADPHONE 43-431355001020 PHONE JACK D3.5MM TC38-020-05-01 W/SW
L401-403,405 38-013100050220 AXIAL INDUCTOR 10UH
LED PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
48-16DX01500221 LED PCB ASSY
13-011309022020 LED LAMP 3MM - ORANGE/BLUE
OPEN SW PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
48-23DX01500220 OPEN SW PCB ASSY
41-071200000020 SERIES MICRO SWITCH SD-002
CLOSE SW PCB ASSY
REF. NO PARTS NO. DESCRIPTION REMARKS
48-23DX0150022A CLOSE SW PCB ASSY
41-071200000020 SERIES MICRO SWITCH SD-002
15
CD-X9
KEY/DISPLAY PCB
HP/AUX JACK PCB LED PCB
OPEN SW PCB CLOSE SW PCB
16
CD-X9
6 WIRING DIAGRAM
MAIN(TUNER) PCB FM ANT
CN201
TO CD(MP3) PCB
CN6
CN503
TO CD PCB CN1
CN504
TO CD PCB CN8
CN505A
CN505B
CN1
TO RCA/D-S PCB CN801
CN702
TO DISPLAY PCB CN702A TO HP/AUX PCB CN505 TO KEY/DISPLAY PCB CN703A
17
CD-X9
CD(MP3) PCB - BOTTOM
CN1
CN3
TO CD DECK
TO MAIN PCB CN503
CN6
TO MAIN PCB CN201
TO MAIN PCB CN504
CN8
CN5
TO CD DOOR SW
CN10 CN9
TO MOTOR
CN4
TO KEY/DISPLAY PCB CN10A TO KEY/DISPLAY PCB CN9A
TO SPEAKER
SUBWOOFER POWER PCB
CN6
CN5 CN2
TO RCA/D-S JACK PCBCN802
TO LED PCB
CN1
CN4
TO TRANSFORMER TO RCA/D-S JACK PCB CN803
18
CD-X9
7 INCLUDED ACCESSORIES
INCLUDED ACCESSORIES
REF. NO PARTS NO. DESCRIPTION REMARKS
77-20DX0900020 INSTRUCTION BOOK- E
45-194150000020 FM ANT 1.5M - BLACK
02-32DX01500000 AM LOOP ANT ASSY
45-164300051020 SPEAKER CABLE - WHITE
45-164300151020 SPEAKER CABLE - RED
45-244300059020 9 PIN S TERMINAL CABLE - GREY
02-17CDX9M00000 REMOTE CONTROL - RC-1045
51-021301000050 LITHIUM BATTERY CR2032
45-263500000120 STEREO MINI PLUG CABLE
19
CD-X9
TEAC CORPORATION 3-7-3 Nakacho, Musashino-shi, Tokyo 180-8550, Japan Phone:(0422)52-5081
TEAC AMERICA, INC. 7733 Telegraph Road, Montebello, California 90640 Phone: (323)726-0303
TEAC CANADA LTD. 5939 Wallace Street, Mississauga, Ontario L4Z 1Z8, Canada Phone: (905)-890-8008
C
TEAC MEXICO, S.A.De C.V. Campesinos N 184,Colonia.Granjas Esmeraida, Delegacion Iztapalapa,CP 09810,Mexico DF Phone: (525)-581-5500
TEAC UK LIMITED Unit 19 & 20, The Courtyards, Hatters Lane, Watford, Hertfordshire, WD18 8TE5, U.K. Phone:(0845) 130-2511
TEAC EUROPE GmbH Bahnstrasse 12, 65205 Wiesbaden-Erbenheim, Germany Phone: 0611-71580
TEAC ITALIANA S.p.A. Via C, Cantu 9/A, 20092 Cinisello Balsamo, Milano, Italy Phone:02-66010550
TEAC AUSTRALIA PTY., LTD. 280 William Street, Melbourne VIC 3000, Australia Phone:(03)9672-2400
A.B.N. 80 005 408 462
OCT 2005
PREPARED IN HONG KONG
MAIN(TUNER) PCB - 1
CN203
ZTB456F15
T206
5x3.5T
5x3.5T
SFU450B
5x2.5T
CD-X9
MICRO HI-FI SYSTEM
MAIN(TUNER) PCB - 2
100
100
C406
470P
100
MC
L406
10UH
HEADPHONE
KSD882
Q701
9015C
L404
10UH
L405
100
CD-X9
MICRO HI-FI SYSTEM
CD (MP3) PCB
C56 !
2200UF
10V
CD-X9
MICRO HI-FI SYSTEM
SUBWOOFER POWER PCB
2
N
U
2
N
U3
!
!
!
! !
! !
! !
! !
!
! !
!
!
CD-X9
MICRO HI-FI SYSTEM