CMT IC202 Service Manual

SERVICE MANUALTuner sectionFM stereo, FM/AM superheterodyne tunerFM tuner sectionTuning range 87.5 – 108.0 MHz(50 kHz step)Aerial FM lead aerialAerial

10Note : About “R”As this unit has only a few buttons, some operations require the use of remote commander (RM-SF3MD/provided with unit: 1-476-068-11)

11CHECKS PRIOR TO PARTS REPLACEMENT AND ADJUSTMENTSBefore performing repairs, perform the following checks to determine the faulty locations up to a c

12RETRY CAUSE DISPLAY MODE• In this test mode, the causes for retry of the unit during recording can be displayed on the fluorescent indicator tube. D

13Reading the Retry Cause Display84218421b7 b6 b5 b4 b3 b2 b1 b00000000100000010000001000000100000010000001000000100000010000000Hexa-decimalDetails010

14CD SECTIONCD TEXT DISPLAY• This unit displays CD text.Text is displayed for the first 50 tracks only and will not be displayed from the 51st track o

15• Reading the Mechanism Error History Display(To switch the history, press the [PLAY MODE/TUNING MODE] button)Display E@@M**#*$*@@ : Error number. 0

16SECTION 2GENERALLOCATION OF CONTROLS• Front View1 I/1 button and indicator2 MD disc slot3 MD A button and MD disc indicator4 MD H S button and in

1760Parts descriptions forthe remoteYou can use the supplied remote to control thesystem.NoteYou cannot perform the following operations with theremot

18SECTION 3DISASSEMBLYNote: Follow the disassembly procedure in the numerical order given.CASE2case1two screws (case3 TP2)1two screws(case3 TP2)FRONT

19MD MECHANISM DECK (MDM-5GA)SLIDER (CAM)2four step screws(BVTPWH M3)1connector (CN601)4wire (flat type) (23 core)(CN103)4wire (flat type) (21 core)

2PROCEDURE FOR USING THE SELF-DIAGNOSIS FUNCTION (ERROR HISTORY DISPLAY MODE)Note 1: About “R”As this unit has only a few buttons, some operations req

20BD (MD) BOARD, BASE UNIT (MBU-5A)7base unit (MBU-5A)1Remove two solders of spindle motor leads (M901).2Remove two solders of sled motor leads (M902

21SPINDLE MOTOR ASS’Y (M901), SLED MOTOR ASS’Y (M902)1screw (M1.7)3gear (SL-B)4three screws(B2 × 5)5spindle motor ass’y(M901)7sled motor ass’y (M9

22BACK PANEL ASS’Y4back panel ass’y1six screws(BVTP3 × 10)3claw2claw3claw4two connectors(CN991, 992)4connector (CN993)5two screws (BVTT3 × 6)8connec

23CD MECHANISM DECK (CDM55A-5SBD32)4holder (MDM)3screw (BVTT3 × 6)5screw (BVTT3 × 6)1wire (flat type) (19 core)(CN109)2connector(CN110)3screw(BVTT3

24HOLDER (BU) ASS’Y1floating screw(PTPWH M2.6)2Remove the holder (BU) ass’yin the direction of the arrow.5optical pick-up(KSS-213BH/Z-NP)3wire (flat

254two screws (B2 × 4)6gear (M)8two insulators (BU)7flatness gear(P)2Remove the four solders.M101M1021screw (BVTP2.6 × 8)3BD (CD) board5sled motor ass

26SECTION 4TEST MODE4-1. PRECAUTIONS FOR USE OF TEST MODE• As loading related operations will be performed regardless of the test mode operations be

27Mark(X)(X)(X)(X) (!)(X)(X)(X)(X)(X)(X)(X)(X)4-5. SELECTING THE TEST MODEThere are 31 types of test modes as shown below. The groups can be switched

28“CPLAY MID” t “CPLAY OUT” t “CPLAY IN” “CREC MID” t “CREC OUT” t “CREC IN” 4-5-1. Operating the Continuous Playback Mode1. Entering the continuous

294-7. TEST MODE DISPLAYSEach time the DISP “R” button is pressed, the display changes in the following order.1. Mode displayDisplays “TEMP ADJUST”, “

3ITEMS OF ERROR HISTORY MODE ITEMS AND CONTENTSSelecting the Test ModeDisplayDetails of HistoryE00 No errorE01 Disc error. PTOC cannot be read(

30SECTION 5ELECTRICAL ADJUSTMENTSMD SECTION5-1. PARTS REPLACEMENT AND ADJUSTMENT• Check and adjust the mechanism deck as follows.The procedure ch

315-2. PRECAUTIONS FOR CHECKING LASERDIODE EMISSIONTo check the emission of the laser diode during adjustments, neverview directly from the top as thi

325-6. CHECK PRIOR TO REPAIRSThese checks are performed before replacing parts according to“approximate specifications” to determine the faulty loc

339. Press the ENTER/YES “R” button to display “EFB = MO-P”.Then, the optical pick-up moves to the pit area automaticallyand servo is imposed.10. Ob

34KMS260A27X40B0825lOP=82.5 mA in this caselOP (mA) = Digital voltmeter reading (mV)/1 (Ω)(Optical pick-up label)5-8. RECORDING AND DISPLAYING THE

3512. Press the ENTER/YES “R” button. When the display becomesRef=@@@.@ (@ is an arbitrary number), press the ENTER/YES “R” button to display “Measu=@

3618. Press the ENTER/YES “R” button, display “EFB = SAVE”for a moment and save the adjustment results in the non-volatilememory.Next “EF CD ADJUST”

37CN110NOTED101I+3VIOPTEORFVCGNDIC171IC121IC101IC192CN101Note: It is useful to use the jig for checking BD (MD) board waveform.(Refer to Servicing Not

38CD SECTIONNote :1. CD Block is basically designed to operate without adjustment.Therefore, check each item in order given.2. Use YEDS-18 disc (3-702

3939HCD-F3MDEFABCDACRFFFTEDBEFLDPDVCCVCRFSUMMINGAMPFOCUSERRORAMPTRACKINGERRORAMPAUTOMATICPOWERCONTROLQ101VCBUFFERRF EQAMPDIGITALPLLSUBCODEPROCESSORSER

4TABLE OF CONTENTSSELF-DIAGNOSIS FUNCTION ... 21. SERVICING NOTES ...

HCD-F3MD40406-2. BLOCK DIAGRAM – MD SERVO Section (1/2) –HR901OVER WRITEHEADOVER WRITEHEAD DRIVEQ181,1823612FILTERPCOFILIFILOCLTVPLLEFM,ACIRC,ENCODE

4141HCD-F3MD2773721716181219422614132415807975788281353736636657546567885655778769222115131218ADDTBCKLRCKDADT512FSSCTXXINTSQSYDQSYMNT3MNT2MNT1MNT0SENS

HCD-F3MD4242EGRIDDRIVES60156102M103(LOADING)OPEN-SWIN-SWLOAD-INLOAD-OUT66677071MOTORDRIVERIC171LOADING MOTORDRIVEMS602–616CLOSEOPENS1CD TRAYOPEN/CLOSE

43436-5. NOTE FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS(In addition to this, the necessary note is printed in each block)CBThese are omi

HCD-F3MD44446-6. PRINTED WIRING BOARD – BD (CD) Board –• See page 43 for Circuit Boards Location.05MAIN BOARDCN1090519TP(VC)TP(RF)TP(TE)TP(FE)TP(FE

4545HCD-F3MD6-7. SCHEMATIC DIAGRAM – BD (CD) Board –• See page 62 for waveforms. • See page 63 for IC Block Diagrams.• Voltages and waveforms are dc

HCD-F3MD46466-8. SCHEMATIC DIAGRAM – BD (MD) Board (1/2) –• See page 62 for waveforms. • See page 63 for IC Block Diagrams.• Voltages and waveforms

4747HCD-F3MD6-9. SCHEMATIC DIAGRAM – BD (MD) Board (2/2) –• See page 62 for waveforms. • See page 63 for IC Block Diagrams.• Voltages and waveforms

HCD-F3MD48486-10. PRINTED WIRING BOARD – BD (MD) Board –• See page 43 for Circuit Boards Location.There are a few cases that the part isn't mo

4949HCD-F3MD()()M903(LOADING)JMD DIGITALBOARDCN102056-12. PRINTED WIRING BOARD – BD SW (MD) Board – • See page 43 for Circuit Boards Location.6-11.

5SECTION 1SERVICING NOTESThe laser diode in the optical pick-up block may suffer electro-static break-down because of the potential difference gener

HCD-F3MD5050BD(MD)BOARDCN102BD(MD)BOARD(2/2)CN1030505SWBOARDCN601MAINBOARDCN10715106176-15. PRINTED WIRING BOARD – MD DIGITAL Board –• See page 43

5151HCD-F3MD6-16. SCHEMATIC DIAGRAM – MD DIGITAL Board –• See page 62 for waveforms. • See page 63 for IC Block Diagrams.• Voltages and waveforms ar

HCD-F3MD52526-17. PRINTED WIRING BOARD – MAIN Board –• See page 43 for Circuit Boards Location.D171 E-2D901 B-7D911 D-7D912 D-6D913 D-6D914 D-6D921

5353HCD-F3MD6-18. SCHEMATIC DIAGRAM – MAIN Board (1/3) –• See page 63 for IC Block Diagrams.• Voltages and waveforms are dc with respect to groundun

HCD-F3MD54546-19. SCHEMATIC DIAGRAM – MAIN Board (2/3) –• See page 63 for IC Block Diagrams.• Voltages and waveforms are dc with respect to groundun

5555HCD-F3MD6-20. SCHEMATIC DIAGRAM – MAIN Board (3/3) –• See page 62 for Waveforms. • See page 63 for IC Block Diagrams.• Voltages and waveforms ar

HCD-F3MD56566-21. PRINTED WIRING BOARDS – AMP/SP Boards –• See page 43 for Circuit Boards Location.D801 A-2D802 A-2D832 B-3D851 D-2D852 C-2IC801 B

5757HCD-F3MD6-22. SCHEMATIC DIAGRAM – AMP/SP Boards –• Voltages and waveforms are dc with respect to groundunder no-signal (detuned) conditions.no m

HCD-F3MD58586-23. PRINTED WIRING BOARD – PANEL Board –• See page 43 for Circuit Boards Location.FL601FLUORESCENT INDICATOR TUBED661 A-2D663 E-3D664

5959HCD-F3MD• Voltages and waveforms are dc with respect to groundunder no-signal (detuned) conditions.no mark : TUNER6-24. SCHEMATIC DIAGRAM – PANE

6DRAWING OUT THE TRAY WHEN THE POWER IS OFFCLEANING THE OPTICAL PICK-UP (CD PLAYER)tray (CDM)Move the cam block in the direction of arrow

HCD-F3MD60606-25. PRINTED WIRING BOARD – POWER Board –• See page 43 for Circuit Boards Location.There are a few cases that the part isn't moun

6161HCD-F3MDThe components identified by mark 0 or dottedline with mark 0 are critical for safety.Replace only with part number specified.• Voltages a

6262Approx.100mVp-p1.45±0.3Vp-p• Waveforms1 IC101 yh (XTAI)– PANEL Board –3.1Vp-p16.9344MHzApprox.500mVp-pApprox.200mVp-p2.4Vp-p7.5 µs0.46Vp-pApprox.6

63• IC Block Diagrams– BD (CD) Board –IC101 CXD2587QIC102 BA5974FP-E2TERFDCCEIGEN AVSS0 ADIO AVDD0CLTVFILOAVSS3VSSAVDD3DOUTVDDPCOFILIASYOASYIRFACBIASS

64IC103 CXA2568M-T6APC PD AMPAPC LD AMPRF SUMMING AMPRF EQ AMPFOCUS ERROR AMPTRACKINGERROR AMPVC BUFFERVCC50µAVEEVEEVCVCVCVCVCVCVCVCVCVCVCCVEEVCCVEEVE

65– BD (MD) Board –IC101 CXA2523AR–1–2+–IVRBB+–IVRAA+–IVRCC+–IVRDD+–IVR+–EEEE'EFB TESWPTGR48MORFO47MORFI46RFO45OPN44OPO43ADDC42COMPP41COMPO40AGCI

66IC121 CXD2654RIC152 BH6511FS10099 98 97 96 95 94 93EFMODVSSTEST3TEST2TEST1FGINSPFDSPRD92SFDR91SRDR90FS489FRDR88FFDR87DVDD86TFDR85TRDR84LDDR83APCREF8

67– MD DIGITAL Board –IC153 LB1830M-S-TE-L1LOGICPREDRIVERVREF2 34510 9 8 76IN2 IN1 VM VREF VCONTVCC OUT2 GND OUT1 VSIC201 UDA1341TS34562871VADCNVADCPV

68– MAIN Board –IC301 M62428AFP600C22232425262728293031333435363738394041422120CPUINTERFACE+–+–+–+–+–+–+–+–32181917161514131210987654321+–+–+–+–+–+–11

69– PANEL Board –IC601 M66004M8FPIC931 M62016LIC171 LB164112 345 6 7 8 910GNDMOTORDRIVENOISEFILTERCLAMPFWD.INREV.INVCC 1VCC 2NOISEFILTERMOTORDRIVEMOTO

7SERVICE POSITION OF THE MD MECHANISMDECKSERVICE POSITION OF THE CD MECHANISMDECKMD mechanism deckCD mechanism deckSERVICE POSITION OF T

70Pin No. Pin Name I/O Description1III-V converted RF signal I input from the optical pick-up block detector2JII-V converted RF signal J input from th

71Pin No. Pin Name I/O Description1 MNT0 (FOK) OFocus OK signal output to the MD mechanism controller (IC316)“H” is output when focus is on (“L”: NG)2

72Pin No. Pin Name I/O Description45 A09 O Address signal output to the D-RAM (IC124)46 XRAS O Row address strobe signal output to the D-RAM (IC124)

73Pin No. Pin Name I/O Description89 FRDR O Focus servo drive PWM signal (–) output to the BH6511FS (IC152)90 FS4 O Clock signal (176.4 kHz) output te

74Pin No. Pin Name I/O Description1 WMOUT OSerial data output to the equipment connected to other unit Not used (open)2 WMCLK ISerial data transfer

75Pin No. Pin Name I/O Description42 HEADUP OOver write head up/down motor control signal output terminal“H” active Not used (open)43 JOG0I Jog dia

76Pin No. Pin Name I/O Description66 XLATCHO Serial data latch pulse signal output to the CXD2654R (IC121)67 WRPWROLaser power select signal output to

77Pin No. Pin Name I/O Description1STKPOWEROPower amplifier (IC801) on/off selection signal output terminal “H”: power amplifier on2P O Power on/of

78Pin No. Pin Name I/O Description46OPT-SEL O Optical signal selection signal output terminal Not used (open)4762DATA O Serial data output to the M

79Pin No. Pin Name I/O Description90KEY1 IKey input terminal (A/D input) S603 to 608 (CDs, CDHS, CDA, MDs, MDHS, MDA, keys input)91KEY2 IKey input

8MC COLD RESET• The cold reset clears all data including preset data stored in the RAM to initial conditions. Execute this mode when returning the set

80supplied with S601not supplied#1#1#2FL601MDM-5GA12543101516141317181912191911911212120208710not supplied(1) CASE, FRONT PANEL SECTIONSECTION 7EX

81(2) CHASSIS SECTIONRef. No. Part No. Description RemarkRef. No. Part No. Description Remark51 A-4475-921-A AMP BOARD, COMPLETE (HK, TW)51 A-4475-92

82Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark* 101 1-671-115-21 SW BOARD* 102 4-996-217-01 CHASSIS* 104 4-996-218-01 BRAC

83(4) MD BASE UNIT SECTION(MBU-5A)Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark151 A-4699-893-A BD (MD) BOARD, COMPLETE1

84(5) CD MECHANISM DECK SECTION(CDM55A-5SBD32)Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark201 4-925-315-31 DAMPER202 1-

85(6) CD BASE UNIT SECTION(BU-5SBD32)Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark251 4-951-620-01 SCREW (2.6X8), +BVTP*

86SECTION 8ELECTRICAL PARTS LISTAMPRef. No. Part No. Description Remark Ref. No. Part No. Description RemarkNOTE:• Due to standardization, replacem

87Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkAMP BD (CD)R845 1-249-441-11 CARBON 100K 5% 1/4WR851 1-249-421-11 CARBON

88Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkBD (CD) BD (MD)R147 1-216-069-00 METAL CHIP 6.8K 5% 1/10WR148 1-216-001-

89Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkBD (MD) LOADINGL105 1-414-813-11 FERRITE 0uHL106 1-414-813-11 FERRITE 0u

9MD SECTIONJIG FOR CHECKING BD (MD) BOARD WAVEFORMThe special jig (J-2501-149-A) is useful for checking the waveform of the BD (MD) board. The names

90Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkMAINA-4475-919-A MAIN BOARD, COMPLETE (HK, TW)A-4475-923-A MAIN BOARD, COMPL

91Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkMAIND921 8-719-024-99 DIODE 11ES2-NTA2BD922 8-719-911-19 DIODE 1SS119-25

92Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkMAIN MD DIGITALR523 1-249-417-11 CARBON 1K 5% 1/4WR524 1-247-807-31 CARB

93Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark< COIL >L181 1-424-675-11 INDUCTOR 33uHL201 1-500-445-21 FERRITE 0uHL2

94Ref. No. Part No. Description RemarkRef. No. Part No. Description Remark< TRANSISTOR >Q601 8-729-620-05 TRANSISTOR 2SC2603-EFQ661 8-729-900-63

95Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkD992 8-719-911-19 DIODE 1SS119-25D993 8-719-911-19 DIODE 1SS119-25< F

96Ref. No. Part No. Description RemarkRef. No. Part No. Description RemarkMISCELLANEOUS**************13 1-777-240-11 WIRE (FLAT TYPE) (21 CORE)14 1-79