Download Print this page
Yamaha CDX-900 Service Manual
Hide thumbs Also See for CDX-900:

Advertisement

Quick Links

CDX·900/CDX·900U
CJ CJ
CJ
CJ
CJ
C::i
CJ
CJ
C::i
C::i
CJ
CJ o
o
CJ CJ CJ CJ
CJ CJ
•coNTENTS
TO SERVICE PERSONNEL .
INTERLOCK OPERATION
FRONT PANELS ..
REAR PANELS ...
SPECIFICATIONS .
BLOCK DIAGRAM
CHIP COMPONENTS DESCRIPTION
DISASSEMBLY PROCEDURES
ADJUSTMENTS ............. .
I 00080
COMPACT DISC PLAYER
tl'£JE><
"'"'"'°°" "'
IMPORTANT NOTICE
This manual has been provided for the use of authorized Yamaha Retailers and their service personnel.
It has been assumed that basic service procedures inherant to the industry, and more specifically Yamaha
Products, are already known and understood by the users, and have therefore not been restated.
WARNING:
Failure to follow appropriate service and safety procedures when servicing this product
may result in personal injury, destruction of expensive components and failure of the
product to perform as specified. For these reasons, we advise all Yamaha product owners
that all service required should be performed by an authorized Yamaha Retailer or the
appointed service representative.
IMPORTANT:
The presentation or sale of this manual to any individual or firm doe. not constitute
authorization, certification or recognition of any applicable technical capabilities, or
establish a principle-agent relationship of any form.
The data provided is believed to be accurate and applicable to the unit(s) indicated on the cover. The
research, engineering, and service departments of Yamaha are continually striving to improve Yamaha
products. Modifications are, therefore, inevitable and specifications are subject to change without notice or
obligation to retrofit. Should ar.y discrepancy appear to exist, please contact the distributor's Service
Division.
WARNING:
Static discharges can destroy expensive components. Discharge any static electricity your
body may have accumulated by grounding yourself to the ground buss in the unit (heavy
gauge black wires connect to this buss).
IMPORTANT:
Turn the unit OFF during disassembly and parts replacement. Recheck all work before
you apply power to the unit.
1/2
LSI DATA
3
FL DATA .
3
IC BLOCK ....
4
PRINTED Cl�CUIT BOARD
5
SCHEMATIC DIAGRAM . ..
6
WIRING ........... ...
7/8
RS-CD9 REMOTE CON TROL TRANSMITTER.
.. 9
PARTS LIST .
10-24
........ 25-29
... . .. . . . ..
.
.
.
.... .......
.
....
YAMAHA
SINCE 1887
NIPPON GAKKI CO., LTD. HAMAMATSU, JAPAN
3 .25K- 3 63
IRJ© Printed in Japan
+
30
.. 31/32
. 33-37
38
39
40
5
.
.
3
.
41 -
'87.3

Advertisement

loading
Need help?

Need help?

Do you have a question about the CDX-900 and is the answer not in the manual?

Questions and answers

Summary of Contents for Yamaha CDX-900

  • Page 1 "'"'"'°°" "' IMPORTANT NOTICE This manual has been provided for the use of authorized Yamaha Retailers and their service personnel. It has been assumed that basic service procedures inherant to the industry, and more specifically Yamaha Products, are already known and understood by the users, and have therefore not been restated.
  • Page 2: Bottom Side

    •10 SERVI C E PE RSO N N E L 1 . Critical Components Information. Components having special characteristics are marked and must be replaced with parts having specifications equal to those originally installed. AC L EAKAG E T E ST E R EQUIPME NT 2 .
  • Page 3 models AOVARSEL : USYNLIG LASER­ $TRALING VEO A.BNING NAR S1KKER HEOSAFBRYOERE ER UDE AF FUNKTION. UNOGA UOS ETTELSE FOR STRALING. Ct.ASS LASER PROOOC T English THIS LABEL IS ATTACHED AT THE PLACE ILLUSTRATED TO INFORM THAT THE APPARATUS CONTAINS A LASER COMPONENT.
  • Page 4 P LAY KEY V601 SW626 D I SP LA Y REMOTE CONTROL IC602 TRANSM ITTER U101 • • F R ONT PAN E LS CDX-900 •NOE• <>A"'°'-" "' • CDX·900U YAMAHA NATUl=IAL SOUNO COIVIP4CT D•SC PLAVEl=I cox-soo u .;,;as �crJ� G:E:J ;:::;:] �88...
  • Page 6 • SPECI FI CATI ONS Com pact disc digital audio system *Specification subject t o change without notice. Format • .•... U.S.A. model ..• AUDIO SECTION DC - 20kHz +0.25/-0.25dB Canadian model B ..British model Less than 0 . 0 04% ( 1 kHz) Frequency response A ..
  • Page 8 • CHI P COMPO N E N TS D ESCRI PTI O N 1. KIND OF CHIP DEVICE We have five kinds of chip devices: The transistors can be identified by their identifica­ tion codes of 2 to 4 alphabet letters assigned to each a.
  • Page 10 • DI SASSEMBLY PROC E D U RES (Remove parts in disassembly order as numbered.) 1. Removal of Top Cover Top Cover Remove 5 screws ( CD ) in Fig. 1, and slide the Top Cover to the back side. Removal of Front Panel a.
  • Page 11 CDX-900/CDX-900U • • A DJUSTMENTS • Necessary items Mea suring instrum ents Oscilloscope (At least one shall have a bandwidth of 50 MHz or Test Point more) LINE Audio frequency oscillator (A.F. OSC): ACVM Oscilloscope (1) Laser power meter (LEADER LPM-8000 (P/N TX915140) or equivalent) AC voltmeter (ACVM) �...
  • Page 12 [• *Carry out following adjustments in order as numbered. • Confirmation of Focus Actuator O peration (Step Step 1. Confirmation of Laser Output. Step 8. Adjustment of Focus Gain; Oscilloscope • 1) setting Step 2. Confirmation of Focus Actuator Operation. Step 9.
  • Page 13 Adjustme nt of VCO (Step Connect the shorting cord and measuring instruments, ©While observing the frequency counter indication as shown in Fig. D. (Fvco ), adjust L501 so that it satisfies the rating. @Do not load a disc. Rating: Fvco 4.3218 MHz±...
  • Page 14 ACVM Oscilloscope (1) o� Filter . state is 400mVp-p. l"tude tn this Oscilloscope (1) Oscilloscope (2) VR105 (EF. B.) p· k Up Head Optical ic ( DG-1) Diffraction Grating Special Tool Fig. E...
  • Page 15 l• Oscilloscope (2) Adjustment of Jitter and F ocus Offset (Step 5) • Waveforms 3T - 11T. 3T, 4T, ST, 6T .., 11T Oscilloscope (2) Settings • AC coupling 0.5 V /div range (Vertical) (50 mV /div when 10: 1 probe is used) 0.2 - 0.5 µsec/div time (Horizontal) Remove the disc tray.
  • Page 17 Oscilloscope (1) 0 0-- Buffer Amp. Fig. G Adjustment of E F Balance (Step 6) Power should not be turned OFF during steps Cg; • through (j) • Rating DC offset-+ Less than ±1 OmV. Oscilloscope ( 1 ) settings DC coupling 1 V/div range (Vertical) (10mV/div when 10:1 probe is used)
  • Page 18 [• Adjustment of HF Level (Step 7) • Oscilloscope ( 2 ) setting CD Connect oscilloscope (2) to • AC coupling shown in Fig. H. 0.5 V/div range (Vertical) @Press POWER key. (POWER ON) ®Load Philips test disc. (50 mV /div wh�n 10: 1 probe is used) 0.2 - 0.5 µsec/div time (Horizontal) ©Press PLAY key.
  • Page 19 A.F. OSC ACVM DODOO �� DODD F i lter Dual Channel ACVM AF. OSC © © Fig. Adjustment of Tracking Gain (Step 9) This adjustment requires use of two single channel AC voltmeters or one dual channel AC voltmeter. (f)Set SW3 to ON. ©Connect the filter and measuring instruments, as shown in Fig.
  • Page 20 A.F. OSC ACVM D ODOO! Dual Channe l ACVM Filter r-· D" VR104 AF. OSC (TR . G) Fig. Adjustment of Tracking O ffset (S tep 10) JConnect a DC voltmeter to :!)While observing the indication (Ea) of the DC on the I nput side of the filter.
  • Page 21 Confirmation of Jitter (Step CD Confirm jitter rating as in (]) of Step 4. ®When jitter rating is improper, go back to step 4 and also carry out adjustments in steps 5 to 10 again. Adjustment of Kick Gain (Step ([;Connect the filter and measuring instruments, as Oscilloscope (1) (2-ch oscilloscope) Settings •...
  • Page 22 Osei l loscope ( 1 ) VR107 (KIC K G .) Filter Probe F ig. L Adjustment of D/A Offset (Step Confirmation of Search Operation (Step CD Connect a DC voltmeter to DAC output and GND terminals. L Load Philips test disc and press PLAY key. IJJI+ D AC output terminal Press Fast Forward mode key (...
  • Page 23 • LSI DATA & 1cso1: YM3816 Signal Processor Controller for Compact Disc Player (SPC) YM-3816 is a CMOS LSI for signal processing and servo control of the compact disc player. It executes such signal processing as demodulation of the EFM signal from the optical pick-up, detection and correction of the erroneous signal and digital filtering which helps to improve the sound quality, as well as such intelligent servo controlling as focus, disc, tracking and feeding.
  • Page 24 Name Function Pin No. EFM Demodulated Signal Check Output (4.3218MHz, clock) FEOF FEM+ Feed Servo System FEM- DATA EFM Demodulated Signal Check Output (4.3218MHz clock) VFSY Sub-code Output Power Supply Not Use <t>4 4.3218 MHz Clock DOUT Data Output to µCOM Q Code Output System Data 1/0 Control Signal Q code Output...
  • Page 25 M50954-402SP (8 bit µ-COM) (Vee) IR51 (R4) P S • - - P44 (t) P63/PWM3 - I F. G I ! M U I P62/PWM2 - P61/PWM ! ( I J P6o/T - ! L S l - Pao P 2 Y - ( T I N ! co , 1 P2•...
  • Page 26 Pin No. Pin Name Function Power Supply Remote control transmitter input Not used PLAY Play mode output Not used LASER LASER servo output "H" = LASER L IGHT TRAY IN Tray loading signal output TRAY OUT Tray unloading signal output Tray close mode input "...
  • Page 27 • • 1c301: YM3404D F or YM3619D F (16 bit over sampl ing d igital filter) YM3404 D F YM3619DF OATA ACCUMULATOR SHIFTER SHIFTER L , R TEMPORARY TEMPORARY YM3619 YM3404 Pin•Name Function Pin No. Pin No. S O I Encoded digital signal serial input SDSY Distinction between Leh and Reh, Data input timing...
  • Page 28 • FL DATA �G S E A R C H ,--, ri hTOTAL T I M E � i R E M A I N T I M E i E L A P S E O T I M E k TRACK INDEX �...
  • Page 29 • 1c BLOC K I C 1 0 1 , 1 02, 1 04 - 1 06 : AN655 1 , NJM4558S, TA75558S or BA7 1 5 I C 1 07 : STA45 1 C (Transistor Array) I C 1 03 : NJM4560S I C31 1 , 31 2: NJM5532S I C31 3 : NJM2043S (Dual Ope-amp)
  • Page 30 I C309, 31 0: PCM56P (D/A Converter) I C602: LU595 1 6 (Decoder) - V e e + V e e D I G G N D VPOT + V L M S B A D J N / C A N A G N D L S I L E C...
  • Page 31 • PR I NTE D CI R C U I T BOA R D ( Pattern side) • Power Unit U, C, A, H, B models T O : MA I N ( I ) <( � P O W E R •...
  • Page 32 CDX-900/CDX-900U side) • P R I NTE D C I R C U I T B OA R D ( Patt e r n Note) 3t � i!ii : Co m p o n e n t s i d e...
  • Page 34 · • SCHEMAT I C D I A G R A M OPT! CAL PICK HEAD -----------------------.. ----------------· DG- 1 11115 • I I ..t l tfO _,_ .... . AMi5�1 lrt,llM 5 �S Ta7555!1S OPTICAL PICK UP 8A7l...
  • Page 35 CDX-900/CDX-900U 30 FZ T 301 " J · · · · · XC021 R····· XC097 IJ,C··-· · X.Cot& l,W,1'4,B····· )(COM I Qt12 R203 ' 10< �11J A Nf.i "l "l l o• �JM4!1:'.i8S ' A ? � � "l8S :SC2'J60 l50400 �...
  • Page 36 r - - - - - - - - i r - - - - - - - - - - - , � � DM - X 5A OPTICAL P I C K U P HEAD � OPERATION P B 0 6 5 4 8 ROADING FEED D I S C...
  • Page 38: Parts List

    CDX-900/CDX-900U Components h avi n g special ch aracteristics are m arked and m ust be repl aced • WARNING P ARTS LIST w i t h parts h avi n g specifica tions eq u al to those ori ginal l y instal led.
  • Page 39 CDX·900/CDX·900U Ref. Common Part No. Description Remarks Markets 7 :..- 7 M odel � iA : 09 ;33 Transistor 25A9335(0. RI 0305. 3 1 8 . 32 1 ,325 lnter­ 25A1 1 1 5(E,Fi iX ;60 ; 3 1 : 10 25A1 3 1 0(R,5,T) 0302' 307 ,324 25A934...
  • Page 40 Ref. Common .!l. lll! 7:,.- � Part No. Description Remarks Markets Model i1" - * :... - NA : 09 : 25 : 20 Servo Circuit Board NA ; 09 ; 25 ; 30 NA : o9 ; 51 ; 10 ;...
  • Page 41 Ref. Common • � 7:.-? Part No. Description Remarks Markets 0109. 1 1 1 . 1 1 4. 1 1 5, M odel 1 1 9-122 y A '/ 1 7 ;40 70 Transistor 2SC1 740S (S.R) iC : 2 s :o3 : 1 0 2SC2603 (E.F) so ' : 3 1 2SC33 1 2 (R.s.n...
  • Page 43 ?:.-? Ref. Common Part No. Description Remarks Markets Model 60 Operation Circuit Board :t -' i..- - ::- ;i :.- ::- - r :::i ;, f :rtt - -* ·:1 FZ :00 : 7 6 : 1 0 Capacitor N etwork C604 CSC300K �...
  • Page 44 DX-900U • EXPLO D E D VI EW �· �- ;!'. ·...
  • Page 45 ¢ : • MECHANISM PARTS D iameter Note) Ref. Ill! � Common Markets 7:.-? Part No. Description Remarks Model JI- .:i. •:; ,< * � NB :S4 : 03 :30 Panel Unit B lack NB :s4 : 04 : s o Silver •...
  • Page 46 7:.-7 ilia � Common Ref. Description Remarks M arkets Part No. Model · vc : 5 1 : 68 : 00 C DX-500 Top Cover 7' 1J Silver •:; '/ ?- AA : 53 : oa : ao I- * '" � - Holder, Socket vs ;...
  • Page 47 • EXPLO D E D VI EW( Disc Mechanis m U nit) Optical P i ck Up H e a d...
  • Page 48 </> : • MECHANISM PARTS( Disc Mechanism U nit) Diameter Note) ill! 7:.-� Ref. Common Part Description Remarks M arkets M odel . . / .::. DM-X5A C DX-700 Disc Mechanism Unit NB : 64 : oo : oo Inter· n : 20 DM-X5 C D-XS...
  • Page 49 • EXPLO D E D VI EW ( RS-C D 9 ) Ref. Common Part No. Description Remarks Markets 7:,.- 7 � � - � � � � Model " � " Remote Control Transmitter J � B lack RS-CD9 vc , 14 :as : oo Silver RS-C D9...
  • Page 50 .., ,, , ,, ...,..,. . , - � ..,, .._.. _ _ Par t s List for Carbon Resistor T ype Part Value T y pe Part Ty pe Part T ype Part Value 1/6W 1 /4W N o.

This manual is also suitable for:

Cdx-900u