Yamaha cdx 993

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COMPACTVDISC PLAYER

CDX-993

SERV CE MANUAL

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the distributor's Service Division.

IMPORTANT: The presentation or sale of this manual to any ind
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 retmfit, Should any discrepancy appear to exist, please contact

IMPORTANT NOTICE

This manual has been provided for the use of authorized YAMAHA Retailers and their service personnel
it has been assumed Ihat 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.

idual or firm does not constitute authorization, certification or

WARNING: Static discharges can destroy expensive components, Discharge any static electricity your body may have accumu-
lated by grounding yourself to the ground buss in the unit (heavy gauge black wires connect to this busst

IMPORTANT: Turn the unit OFF during disassembly and parts replacement. Recheck all work before you apply power to the unit,

I CONTENTS

TO SERVICE PERSONNEL
SPECIFICATIONS .
REAR PANEL
INTERNAL VIEW 3
DISASSEMBLV PROCEDURES
ERROR MESSAGE ..
STANDARD OPERATION CHART .9~10
TEST MODE 1 1~12
MEMORY BACKUP 12

ADJUSTMENT
IC DATA ......
BLOCK DIAGRAM ....... ....... 20~21
PRINTED CIRCUIT BOARD .. .22~29
IC BLOCKS . 30~31
SCHEMATIC DIAGRAM 32

REMOTE CONTROL TRANSMITTER. 33

PARTS LIST 34~44

GREASE & OIL ............... 45~46
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34

C DX-993

HARTS LIST

I ELECTRICAL PARTS

I WARNING
Components having special characteristics are marked 53 and must be
replaced with parts having specifications equal to those originally installed.

0 Carbon resistors (1/6W or 1/4W) are not included in the ELECTRICAL PARTS
List. For the part Nos. of the carbon resistors, refer to the last page.

ABBREVIATIONS IN THIS LIST ARE AS FOLLOWS :

C.A.EL.CHP : CHIP ALUMI. ELECTROLYTIC CAP L.EM|T : LIGHT EMITTING MODULE
C.CE : CERAMIC CAP LED.DSPLY : LED DISPLAY

C.CE.ARRAY : CERAMIC CAP ARRAY LED.INFRD : LED, INFRARED

C.CE.CHP : CHIP CERAMIC CAP MODUL.RF '. MODULATOR, RF

C.CE.ML : MULTILAYER CERAMIC CAP PHOT.CPL : PHOTO COUPLER
C.CE.M.CHP : CHIP MULTILAYER CERAMIC CAP PHOT.INTR : PHOTO INTERRUPTER
C.CE.SAFTY : RECOGNIZED CERAMIC CAP PHOT.RFLCT Z PHOTO REFLECTOR
C.CE.TUBLR : CERAMIC TUBULAR CAP PIN.TEST : PIN, TEST POINT

C.CE.SMI : SEMI CONDUCTIVE CERAMIC CAP PLST.RIVET : PLASTIC RIVET

CIEL : ELECTROLYTIC CAP R.ARRAY : RESISTOR ARRAY

C.MICA : MICA CAP R.CAR : CARBON RESISTOR

C.ML.FLM : MULTILAYER FILM CAP R.CAR.CHP : CHIP RESISTOR

C.MP : METALLIZED PAPER CAP R.CAR.FP : FLAME PROOF CARBON RESISTOR
C.MYLAR : MYLAR FILM CAP R.FUS : FUSABLE RESISTOR
C.MYLAR.ML : MULTILAYER MYLAR FILM CAP R.MTL.CHP : CHIP METAL FILM RESISTOR
C.PAPER : PAPER CAPACITOR R.MTL.FLM : METAL FILM RESISTOR

C.PLS : POLYSTYRENE FILM CAP R.MTL.CXD : METAL OXIDE FILM RESISTOR
C.POL : POLYESTER FILM CAP R.MTLPLAT : METAL PLATE RESISTOR
CPOLY : POLYETHYLENE FILM CAP RSNR.CE : CERAMIC RESONATOR

C.PP : POLYPROPYLENE FILM CAP RSNR.CRYS : CRYSTAL RESONATOR
C,TNTL : TANTALUM CAP R.TW.CEM : TWIN CEMENT FIXED RESISTOR
C.TNTL.CHP : CHIP TANTALUM CAP R.WW : WIRE WOUND RESISTOR
C.TRIM : TRIMMER CAP SCR.BND.HD : BIND HEAD B-TITE SCREW
CN 1 CONNECTOR SCRIBWHD : BW HEAD TAPPING SCREW
CN.BS,P|N : CONNECTOR, BASE PIN SCR.CUP : CUP TITE SCREW
CN.CANNON : CONNECTOR, CANNON SCR.TERM : SCREW TERMINAL

CN.DIN 2 CONNECTOR, DIN SCR.TR : SCREW, TRANSISTOR
CN.FLAT : CONNECTOR, FLAT CABLE SUPRT.PCB : SUPPORT, P.C.B.

CN.FOST : CONNECTOR, BASE POST SURGPRTCT : SURGE PROTECTOR
COIL.MX.AM : COIL, AM MIX SW.TACT : TACT SWITCH

COIL.AT.FM : COIL, FM ANTENNA SW.LEAF : LEAF SWITCH

COIL.DT.FM : COIL, FM DETECT SW.LEVER : LEVER SWITCH

COIL.MX.FM : COIL, FM MIX I SW.M|CRO : MICRO SWITCH

COILOUTPT : OUTPUT COIL SW.PUSH : PUSH SWITCH

DIOD.ARRAY : DIODE ARRAY SW.RT.ENC : ROTARY ENCODER
DIODE.BRG : DIODE BRIDGE SW.RTMTR : ROTARY SWITCH WITH MOTOR
DIODE.CHP Z CHIP DIODE SW.RT : ROTARY SWITCH

DIODE.VAR : VARACTOR DIODE SW.SLIDE : SLIDE SWITCH

DIOD.Z.CHP : CHIP ZENER DIODE TERMSP : SPEAKER TERMINAL
DIODE.ZENR : ZENER DIODE TERM.WRAP : WRAPPING TERMINAL
DSCR.CE : CERAMIC DISCRIMINATOR THRMST.CHP : CHIP THERMISTOR

FER.BEAD : FERRITE BEADS TR.CHP : CHIP TRANSISTOR

FER.CORE : FERRITE CORE TR.DGT : DIGITAL TRANSISTOR
FETCHP : CHIP FET TR.DGT.CHP : CHIP DIGITAL TRANSISTOR
FL.DSPLY : FLUORESCENT DISPLAY TRANS : TRANSFORMER

FLTR.CE : CERAMIC FILTER TRANS.PULS : PULSE TRANSFORMER
FLTR.COMB : COMB FILTER MODULE TRANS.PWR : POWER TRANSFORMER ASS'y
FLTR.LC.RF : LC FILTER ,EMI TUNERIAM : TUNER PACK, AM

GND.MTL : GROUND PLATE TUNER.FM : TUNER PACK, FM

GND.TERM : GROUND TERMINAL TUNER.FK : FRONT-END TUNER PACK
HOLDER.FUS : FUSE HOLDER VR : ROTARY POTENTIOMETER
IC.PRTCT : IC PROTECTOR VRIMTR : POTENTIOMETER WITH MOTOR
JUMPER.CN : JUMPER CONNECTOR VR.SW : POTENTIOMETER WITH ROTARY SW
JUMPER.TST : JUMPER, TEST POINT VR.SL|DE : SLIDE POTENTIOMETER
L.DTCT : LIGHT DETECTING MODULE VR.TRIM : TRIMMER POTENTIOMETER

Note) Those parts marked with II" are nol included in the P.C.B. assy.