Tascam CD-450 CD-450 User manual

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TASCAM
TEAC Professional Division
SERVICE MANUAL
-450
Compact Disc Player
NOTES
•PC boards shown are viewed from pans side. •7'jy
•Pans marked with *require longer delivery time.
•The pans with no reference number or rto pans number in the
exploded views are not supplied.
•As regards the resistors and capacitors, refer to the circuit
diagrams contained in this manual. •fiSiirogln, :3yxVtf-l5iSI5Lr®y*To
•AParts marked with this sign are safety critical components. ®i8ia^ep8Lt</fsi.'«
They must be replaced with identical components -refer to the
appropriate parts list and ensure exact replacement. xmtimi.ii'-tr- -(7 -jO ffl L, T<fc 5
L
•Parts of []mark can be used only with the version designated. •f±lSl5fe
[J] JAPAN [US/C];U.S. A. /CANADA [K]; KOREA [E]; EUROPE [J]:JAPAN :US/C];U.S. A. /CANADA [KJiKOREA [E]:EUR0PE
[UKliU.K. [A];AUSTRALIA [UK]:U.K. lA!: AUSTRALIA
tNSTRUCTIONS FOR SERVICE PERSONNEL
BEFORE RETURNING APPLIANCE TO THE CUSTOMER. MAKE LEAKAGE -CURRENT
OR RESISTANCE MEASUREMENTS TO DETERMINE THAT EXPOSED PARTS ARE
ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT.
Effective :January, 1999 D00478000A

1. SAFETY INFORMATION
SAFETY INFORMATION
This product has been designed and manufactured according lo FDA regulations 'title 21, CFR, chapter 1, subchapler J, based on the
Radiation Control for Health and Safety Act of 1968 ',and is classified as class 1laser product. There is not hazardous invisible laser radiation
during operation because invisible laser radiation emitted ir^side of this product is completely confined in the protective housings.
The label required in this regulation is shown (J)
,
CAUTION
USE OF CONTROLS OR ADJUSTMENT OR PERFORMANCE OF PROCEDURES OTHER THAN THOSE SPECIFIED HEREIN MAY RESULT IN
HAZARDOUS RADIATION EXPOSURE.
•CAUTION •ACHTUNG •08SERVERA •ADVARSEL
d)THIS LABEL IS ATTACHED TO THE PLACE AS ILLUSTRATED TO INFORM
THAT THE APPARATUS CONTAINS ALASER COMPONENT.
(D DIESE AUFKLEBEMARKE 1ST AN DEM IN DER ABBILDUNG QEZEIQTEN ORT
ANGEBRACHT UM OARAUF HINZUWEISEN. DASS IM INNERN DES GERATS
EINE LASER-KOMPONENTC BEFINDET.
(3) PASKRIFTEN SITTER pA APPARATEN SOM VISAS SOM UPPMANING OM ATT
APPARATEN OMFATTAR EN INBVGGD LASERKOMPONENT.
(J) DETTE M/ERKAT ER ANBRAGT SOM VIST IILLUSTRATIONEN FOR AT ADVARE
BRUGEREN OM AT APPAHATET INDEHOLDER EN LASERKOMPONENT.
^OETTE M/ERKAT ER SOM VIST pA ILLUSTRATIONEN ANBRAGT PA
INDERSIDEN AF TOPD/EKSLET FOR AT ADVARE BRUGEREN OM AT
YDERLIGERE FREMTR/CNGEN VIL V/ERE FORBUNDET MED FARE FOR AT
UDS«TTE SK3 FOR LASERSTRAlING.
ADVARSEL- BETJENING AF ANDRE KONTROLLEH OG REQULATORER ELLER
BENYTTELSE AF ANDRE FREMGANQSMAdER END BESKREVET HERI ER
FORBUNDET MED FARE FOR USD/ETTELSE FOR LASERSTRAlING,
VARN1G; APPARATEN INNEHAlLER LASER KOMPONENT MED
strAujing OVERSTIOANDE KLASS 1
ADVARSEL: USYNLIG LASERSTRAlING VED AbNING NAR
SIKI^RHEDSAFBRYDERE ER UDE AF FUNKTION. UNOGA
udsaettelse FOR strAling.-
•VAROITUS! SUOJAKOTELOA El SAA AVATA. LAITE SISALTAA
LASERDIODIN. JCM<A LAHETTAA (NAKYMATONTA) SILMIU^
VAARALLISTA LASERSATE1LYA'.
ADVARSEL: USYNUG LASERSESTRALING nAr DENNE
DELEN ER APEN OG SIW<ERHETSSPERREN ER UTKOBLET
UNNGA UTSETTELSE FOR strAling.
2

2. SPECIFICATIONS
CD-450
Disc: 8-cm/12-cm CD
Audio channel: 2channels
Quantization: l6-bit linear
Sampling Frequency: 44.1 kHz
Analog output level
Line output (RCA)
Nominal output level: -10 dBV (load Impedance
10 kO, unbalanced)
Maximum output level: ^6dBV (2Vrms)
Line output (XLR) [Optional LA-450]
Nominal output level: +4dBu (load impedance
10 kQ, balanced)
Maximum output level: -^20 dBu
Headphone output (standard stereo phone jack);
25 mW at max. (load impedance 32 Q)
Digital output
Coaxial (RCA): lEC 60958 home-use (SPDIF)
Balanced (XLR) [Optional LA-450):
lEC 60958 broadcasting studios (AES/EBU)
Power requirements:
120V AC, 60Hz (U. S. A./ Canada model)
230V AC, 50Hz (Europe/ U. K. model)
240V AC, 50Hz (Australia model)
220V AC, 60Hz (Korea model)
Power consumption: 16 Watts
External dimensions: 482 X104.5 X310 mm
Weight: 5.1 kg
Typical Performance
Frequency Response: 20 Hz to 20 kHz ±IdB
Signal-to-Nolse Ratio: Better than 90dB
Distortion: Less than 0.006%
Channel Separation: Better than 85dB
Pitch control: Within ±12 %(1 %steps)
Auto cue level: -72/- 66/- 60/- 54 dB
8cm/l 2cm HCD
Mfitify t-SS 16t;-y hiS»«
5-fyth* (RCA)
44,1kHz
-lOdBV
lOkQ.
*6dBV (2Vrms)
5-0115* (XLR) I:T7v3'/LA-450]
asii5*L/-<;u -t4dBu yyy.
lOkQ, 42*)
•*lb*LrK;u 20dBu
''••y h-tryth^ y-i’)
«*25mW
(k^'Tyd- ?'-^:X32Q)
l^« (RCA) lEC 60958Siffl (SPDIF)
(XLR) a>LA-450]
lEC 60958
(AES/EBU)
ACIOOV (50Hz -60Hz)
16W
482 X104.5 X310 mm
R1 5.1kg
20Hr~20kHz ±IdB
SNJ± 90dB«±
0,006 %j-:jt
/^)Ltr/\'U —/a/ 85dBlil±
tfvfD'y ho-)b ±12%i-Urt (1 %JHffi)
th+a
-
yoi -72/- 66/- 60/ 54 (dB)
*Changes in specifications and features may be made *) *T.;
without notice or obligation.
3

CD-450
3. CHECKS
1. Handling the pickup assembly 1. t' -:;^?7->yASSYroH»JR
•Before servicing the pickup assembly be sure to prevent
electrostatic-inducer destruction by grounding not only
test equipment in use but also yourself.
*Electrostatic charge drastically shortens the operating
life of the laser diode or possibly results in its
destruction.
•Hold the slide base when handling the pick-up.
(Fig. 3-1)
•LD terminals are factory-strapped before shipment to
protect LD from electrostatic discharges during
transportation. (Fig. 3-2) After connector insertion,
unstrap the LD terminal with asoldering iron.
The temperature of the soldering iron tip must be 320T1
or below (30W )and the unstrapping should be
performed quickly.
•Don't disassemble the pickup ass’y.
•Don’t apply shock to the pickup ass'y.
•Don't place the assembly in a place subject to excessive
dust, heat or moisture.
•The LD chip is manufactured from GaAs and GaAlAs.
which contains toxic As (Arsenic). Parts removed in
servicing should be disposed of with due care.
*U— KJl.
(Fig. 3-1)
•LDOTJSf-ti, h
(Fig. 3-2)
Y-ffliffll. 3T5tfflS:;)<320t:iy K(30W)<Db««-(*fflL. t
^'P*'ldfT-»T< fiSl'c
•tf -y 5-7 -y 7- ASSY J; tit L'T; </;
St'.
•tr -y 77.y -7 ASSY ll«T •t>T- </: $I
•7- i<sa •^soiSfliriiafi^T
<fbSi'o
•LD -J -fl,i GaAs +GaAlAs T? fj As f
.
I'.
2. Objective
•Never look directly into the LD or observe the laser
beam through another lens or mirror.
•Don't touch the objective with fingers.
•If objective becomes dirty, playback will deteriorate.
To clean the objective, moisten agood cleaning tissue,
such as made by KODAK, in isopropyl alcohol and wipe
the objective gently. Wipe off and excess fluid with a
dry cleaning tissue.
2.
iiSLtKfb'St'o (KODAK ttKiif) Yvy
ot'-h/7;U3-;b (I.P.A) 5-^LT^S-S’L.
Ap i ioT<t'o
4%

3. Checking the pickup actuator operation
Before loading the disc, turn the power ON and check
that the pickup actuator moves up and down six times.
(If the pickup is not at inside on the disc, perform the
above operation after moving the pickup to the inside.)
4. Focus offset check
1. Connect the jitter meter between RF terminal of R423
on the MAIN PCB and GND.
2. Play the track 1of the test disc MCD-111. and check
that the jitter value is SOnsec or less.
(RF level ;1±0.2 Vp-p)
5. Audio check
3. f-:, .y /7
97 yT’Atfirtja Ih fi I'i § IJ .l.adKl-fV-r
4. hSitS
1. MAIN PCBO5R423 03RFfig^i GND Wlh •>' >5- --9
2.
MCD-111 «llUiU«-li)'liLfcti. vy9-
m< 30nsec WT-C*) 5Ci 6 =
(RF UA./P ;1±0.2Vp-p>
ITEM DISC: MCD-111 SPECIFICATIONS REMARKS
II STRACK No. FREOUENCY/LEVEL mIS mm
1.Output level 2IkHz, OdB
UNBAL OUT
;
2 ± 0.5 Vrms
tli* PHONES OUT
;
0.9 ±0.3 Vrms PHONES VR ;MAX
32 Qload
2. Channel level
difference 2 1kHz, OdB
UNBAL OUT
;
1d6 or less
PHONES OUT
:
2.5 dB or less
3. Harmonic
diatortion 21kHz. OdB
PITCH CON OFF :
0.006 %or less
PITCH CON ON :
0.04 %or less
400Hz HPF in
20kHz LPF in
4. Frequency
response 3~6 20Hz--20kHz, OdB Within ±0.5 dB reference level ;IkHz
5. S/N ratio
S/Nit 7-codB 90 dB or better 20 kHz LPF in
A- weighted
6. Channel
separation
t/fL/— •> 3y
8. 10 1kHz, OdB 85 dB or better 20 kHz LPF in
A- weighted
5

CD-450
4. EXPLODED VIEWS AND PARTS LIST
6

CD-450
EXPLODED VIEW-1
REF. NO. PARTS NO. DESCRIPTION
1- 1*9260303000
1- 2*9260302500
1- 3*9260302900
1- 4A*9121000102
A*9121000400
1- 5A*9109026112
A*E00423900A
A*9109029400
A*9109026010
A*9109025711
A*9109027701
1- 6*9260306300
17*9260303100
1•8*9260296400
1- 9*9260260000
1-10 *9781801200
1-11 *9145251001
*9145251004
1-12 A9125121000
1-13 *9260305701
1-14 *9278371000
1-15 *9107109000
1-16 *9260301900
1-17 *9260302100
1-18 *9260302800
1-19 *9260302200
1-20 *9260302302
1-21 *9260302400
1-22 *9145252000
1-23 *9260305600
1-24 *9260306001
1-25 *5504676000
126 *9260301700
1-27 *9260271101
1-28 M00002503A
1-29 *9260301801
1-30 *9260302000
1-31 *9260316300
1-32 *9260316200
141 *9783243012
1-42 *9783053006
1-43 *9783593008
1-44 *9783513008
1-45 *9783294008
1-46 *9260245902
1-47 *9783053006
1-48 *9783204018
1-49 *9783393006
1-50 *9783243008
1-51 *9260316500
1-52 *9294209100
1-53 *9162001300
SIDE ANGLE L
BONNET
SIDE ANGLE R
BUSHING. #2271 [J, K, A, E. UK]
BUSHING. 6N3-4 [US/C]
AC CORD [J]
AC CORD [K]
AC CORD [US/C]
AC CORD [A]
AC CORD [E]
AC CORO [UK]
REAR PANEL
XLR COVER
PUSH RIVET P3545
PVC HASHER
NUT Ml 2
GATHER PCB A ASSY (J, US/C]
GATHER PCB AASSY [K. A. E. UK]
POWER TRANS
TRANS PROTECT SHEET
CD MECHA.KSL-2130CCM.
FFC16P WIRE. CO MECHA
TRAY PANEL
POWER LINKAGE
PHONE BRACKET
KEY BUTTON 1
KEY BUTTON 2
KEY BUTTON 3
GATHER PCB BASSY
FLAT CABLE CLAMP FC-15
CHASSIS ASSY
FOOT
FRONT PANEL
BAOGE TASCAM SILVER
KNOB. GB
ESCUTHEON
FL WINOON
STICK FINGER
FRONT CHASSIS
SCREW BTT-B M3X12 (BLK)
SCREW, CAP'S M3X6 (BLK)
SCREW, C-TITE H3X8(NI-BLK)
SCREW. BTT-P M3X8 (BLK)
SCREW. BTT-SSB M4X8
COVER, SCREW
SCREW, CAP-S M3X6 (BLK)
SCREW, BTT-S M4XI8
SCREW. JOGGLING M3X6
SCREW, BTT-B M3X8
SQUARE SNAP BUSHING
WASHER. FIBER 7. 3X3. 2X0. 5T
FERRITE. ZCAT1325-053A
REMARKS
7

CD-450
8

CD-450
EXPLODED VIEW-2
REF. NO. PARTS NO. DESCRIPTION REMARKS
2- 1*9278383600
2- 2*9278383800
2- 3*9278316900
2- 4*9278372800
2- 5*9278372900
2- 6*9278372100
2- 7*9278383400
2- 8*9278372300
2- 99278318700
2-10 *9278372600
2-11 9278372400
2-12 9278372500
2-13 *9278372700
2-14 *9278384600
2-15 *9278372000
2-16 9278373000
2-17 *9155244600
2-18 9137004400
2-19 *9144516200
2-20 *9278372200
2-21 9278371900
2-22 *9278385000
2-23 9278382900
2-24 *9278383300
2-25 9278384900
2-26 *9278383100
2-27 *9278383000
2-28 9278371600
2-29 *9278371800
2-30 *9278384300
2-31 *9278383900
2-32 *9278384000
2-33 9278371700
2-34 *9155244500
2-35 9278322000
2-36 *9144516100
2-37 *9278384400
2-41 *9278383500
2-42 *9278384500
2-43 *9278384800
2-44 *9278383200
2-45 *9218382800
2-46 *9278384100
2-47 *9278384200
CROCKING YOKE (S)
DAMPER
MAGNET
PLATE (S). CHUCKING
CHUCKING PULLY
TRAY (0(2130)
TRAY STOPPER
COVER(S).GEAR
LM BELT
LOADING PULLY (S)
DRIVE GEAR (S)
MIDWAY GEAR (S)
GEAR (S). TRAY
CONTROL CAM (S>
OUTSERT MAIN CHASSIS (S)
LOADING MOTOR ASSY
LOADING PC BOARD
LEAF SWITCH
CONNECTOR PIN 5P
SUB CHASSIS 2130
GEAR (AXS)
COVER. GEAR (B) (RP)
GEAR (B)(RP)
REINFORCEMENT (S)
OPTICAL PICKUP UNIT
RING (LOXS). CENTER
SPRING (S). COMPRESSION
MOTOR CHASSIS ASSY (MB)
SLED SHAFT
INSULATOR
COIL SPRING (FRONT)
COIL SPRING (BACK)
MOTOR GEAR ASSY
MOTOR (6P) (S) PCB
LEAF SWITCH
CONNECTOR PIN 6P
DRIVE UNIT
SCREW tPTPWH 2.6*7
SCREW tPTPWK2.6*16
SCREW B2. 6*2.
5
SCREW (2*5), TAPPING
SCREW 4-P2*3
WASHER 2130
SCREW -.2.6*10 NO SLIT 2
9

CD-450
5. PC BOARDS AND PARTS LIST
'j Xh
10