ONKYO@ SERVICE MANUAL
Contents
1. LE 5 HF TY MIRROR 48 DIFFRENTIAL MIRROR AMP AMP on RF COMPARATORL 8114 1C107 gt 20 EFMI PIN 16 IC107 PIN 8 Fig 5 3 RF Signal 3 2 HF and FRF signals The RF HF amplifier block amplifies the RF HF data en coded on the disc in other words the entire output from the four section photodiode and sends it to the processing circuit block In addition it constantly checks the status of the servo and detects the signals which determine timing R F H F A B C D Eye pattern 3 1 RF amplifier and B D signals input to IC101 pins 5 and 6 are added by the opamp in the IC After amplification by an RF ampli fier the result is output from IC101 pin 3 as the RF signal RF amplifier gain is determined by R106 external to the IC The RF signal output from IC101 pin 3 passes through RF fil ter L101 where noise is removed It then passes through C104 and is input IC101 pin 2 The RF signal then passes through RF comparator inside IC101 and is output from pin 20 It is then input to IC107 pin 8 and undergoes further signal proces sing Q R146 FEM N FEM N R141 R143 R145 C A cu va IS on Q108 e R137 c O a TRACKING RF signal input to IC101 2 is processed by a focus OK aplifier and mirror amplifier in the IC The resulting signals are output from 1 101 pins 1 and 18 as the FRF and HF signals respectively These signals2. General Power Requirements USA amp Canadian Models Worldwide Model 4 094 B c a c a Power Consumption Dimensions x Hx D Weight Supplied Accessories 2 Stereo 20 20 000 Hz 96 dB at 1 kHz 85 dB at 1 kHz 0 0396 at 1 kHz Below threshold of measurability 2 Volts r m s 88 2 kHz 16 Bits Two times over sampling Digital Filter Analogue Filter 120 mm 4 3 47 500 200 rpm inside Outside 1 6 um 60 Min Non Contact Solid State Laser PCM Wavelength 0 79 um AC 120V 60 Hz AC 110 120 220 240V switchable 50 60 Hz 15 Watts 435 x 114 x 348 mm 17 1 8 x 4 1 2 x 13 11 16 6 4 kg 14 2 Ibs Output Signal Cord Remote Control Transmitter RC 128C size UM 3 battery x 2 CD Magazine Instruction Manual v e 9o 6 Specifications are subject to change without notice DX C400 TABLE OF CONTENTS Specifications 2 1 Service 2 Note on compact disc 3 Protection of eyes from laser beam during servicing 4 Certification label 4 Caution on replacement of pickup 4 IC block diagram and descriptions 5 Circuit descriptions 2 10 Parts 17 Disassembling procedures 2 2 2m nn nn 17 Chassis exploded 1
3. AHOWIN 96 3016 10363 9510 AV Id WOONYH lt DD Di 1v3d3iu 625 106 6 211 6 L071 20621 21 1353 3675164 Wvu S u wove AS ELL OI ZHWS 7 20 201 IE rm E pr i _ mel 1068147 MM sme E 1005 E ams Add AV1dSIO LOCI PES U3Lu3ANO2 gt 2070 070 H3ld H H3lNI 52979971 HOSSFION 0075 0721 Ld 40 B CT 915 3093 GILDI 4 4399141 341 cU 383 2 WA 40121 HER 8 OIS WOD 220666 toL X o 421 8 ONIA YON 42018 Oldnv EE m HOLOW TLFIYSN Y 3AIHQ 310W 440 ddl 2 er m if L st 1 SOLOW 2510 dO lt M MS GISNI 135440 vul 8 24 AVISI 01 3 AL EOLUAS HOLLMS 1081NOO i IN3WV 13 OAU3S WOVUL 4 274 0LS9 V 1 90 21 ANY 20 529 9 7 60121 5 1 dO H3MOd a w lt IV Hl a wos 109 awy LOW 0234 lt lt 1 lt 104 LNOD LIfI2HIO 18 15 ANL3WWASY 2018 6010 x gt
4. Disc Servo mechanism Pins Tracking Servo mechanism related Pins Feed Servo mechanism related Pins RAM Connection 75 XFSY 73 EFLG 34 2 66 SDO SDSY 63 DTFLG 69 TEST A and 71 TESTC Crystal Clock SYNC Signal Cl and C2 Error Correction Check Signal DATA Control Circuit Serial Signal Output 65 QOUT 64 QSYNC 76 SAMP1 77 SAMP 2 and 68 4 DAC Interface 62 DEP 69 TEST 70 TEST 71 TEST 18 TEST D and 8 TCL De emphasis Signal Test Pins DX C400 YM3020 D A converter 32012 ssa 123135 WHOd as g Z dWS dWNS 2 lt o N a gt J Uu U U U O I r pg lt WM c 7 7 Pin No Designation Function Assignment VOUTCHI Sample hold analog switch output for Channel 1 SMP 1 Interval of signal at state 17 will be the sampling time of Interval of signal at state 17 will be the sampling time of CH2 SMP 2 The rising edge of SMP 1 and SMP 2 is used to generate the internal signal to latch the serial data The level frequency characteristics will be improved as the signal time of SMP 1 and SMP 2 becomes longer 3 Serial input of converted digital signal 5 FORM Corresponds to binary input at state 1 and corresponds to 2 s complement input at state 0 Low potential side power GND Clock to drive sh
5. I V div 5ms div Fig 4 Center Ground Photo 4 8 Tracking gain adjustment 1 Load test disc YEDS 18 and initiate play 2 The band pass filter is passed through and AC voltmeter is connected at the pins 5 and 6 of TP 103 3 With the AF oscillator connected at pin 4 of TP 103 800Hz 100mV is passed through 220kohm and input 4 Adjust 5 104 so that the output discrepancy between and pin 6 of TP 103 is 16 1dB Pin 6 gt Pin 5 2CH AC VOLT METER Fig 6 9 Tracking offset adjustment Connect a resistor 1000hm between pins 3 and 1 of 103 O MILLIVOLT METER Connect the millivolt meter to pin 5 of TP 103 Adjust SVR103 so that the millivolt meter reading becomes 25mV O O O 10011 gt 10 Philips 5A track 19 noise adjustment Fig 7 1 Connect an error rate detector jig to TP 104 2 Play the track 19 of Philips 5 3 Connect the error rate detector jig C2F2 to the frequency counter 4 Confirm that the counter display is less than 100Hz while track 19 is plaving Performance is acceptable as long as 100Hz is not exceeded continuously 5 If the level exceeds 100Hz continuously radjust SVR102 to bring it down below 100Hz 6 After readjusting SVR102 readjust the focus gain as well TP104 Fig 8 11 VCO confirmation 1 Connect the frequency counter to TP VCO 2 Confirm that the output frequency is 1 322 0 005M Hz 3 If it is not with
6. 1 d OAH3S HLIMS 3 046 i va HOL 3H Vdi O2 Alt 0335 1203 DOGS 39 D W31SAS 2 2444 35 CH AEE lt 0204 1 34 ZHO9 0095 d WOD OA OV UNID dO Gr 1203 m 24 0159 1 70121 2979 1 20131 gt lt 93591 dy dO YaMOd SOLYAS i HOLOW 0334 XOvu1 mi sul Addns Y3MOd 0 550 50303 A 112812 OAu3S i 824 NIVW u 21 OAU3S _ _ _ _ _ p _ 60 02 8 10 21 WVdSVId 52018 39 DX C400 PACKING VIEW REF NO PART NO i 29341319 29365019 29365021 29358002 2010098 29360936 25055380 29100005A 23091191 29091192 29100049 24506732 24140128 3010054 29051764 29051765 282301 10 260012 J m OI nb DESCRIPTION Instruction manual Warranty card lt Warranty card PX Service station list Connection cord Label INDEX for magazine Conversion plug lt PX gt 240 x320mm Poly bag Pad R Pad L 570 x500mm Poly bag Magazine 128C Remote controller UM 3 Two batteries Master carton box D Master carton box lt PX gt Sealing hook Damplon tape Note lt D gt Only U S A model lt PX gt Only PX model ONKYO CORPORATION international Division No 24 Mori Bldg 23 5 Nishi Shimbashi 3 chome Minato ku TOKYO 105 JAPAN Telex 242 3551 ONKYO J Tel 03 432 6981 ONKYO U S A CORPORATION 200 Williams Drive Ramsey N J 07446 Telex 25 71
7. gt tu 1 LL un uw gt DX C400 CIRCUIT DESCRIPTIONS Ico EN OPTICAL PICKUP c R262 6 al l D c 2 5 1 2 3 mE la 13 I l Focus Servo Circuit The focus servo ensures that the laser beam emitted by the optical pickup is always focused on the reflective surface of the disc It does this by moving the optical pickup s objective lens in response to oscillations in the disc surface 1 l Focus Error Detector The detector obtains the difference between the signals produced by the diagonal elements of a four section photodiode housed in the pickup and utilizes an astigmatic method to detect focusing errors F E focus error A CO B D C and B D are input into pin 5 and pin 6 of IC101 respectively The FE signal is calculated by the three opamps in IC101 and output via pin 16 1 2 Phase Correctors Drivers The focus error signal passes from IC101 pin 16 to IC102 pin 6 to IC102 pin 8 to IC104 pin 6 to IC104 pin 9 and drives the pickup focus coil IC104 is the coil driver power opamp C125 C126 and C124 are phase correctors which enhance the servo s stability Semi fixed resistors SVR102 and SVR105 are used to regulate balance and gain in the servo circuitry Q107 transistor switch turns the servo loop on and off Control is mainteined by means of the FCS signal are from microproces sor C107 pin 13 1 3 Focus search circuit The
8. 9 a 506 FC502 2 5 mu x e 5 8565 33 gt Bee EHER Hot RESET it 5 E nom Osc c R508 A ea Uc ED 5 Z gtp 9 DATE 3 59 2 op 2 JE 36 MAIN FSIO5 DX C400 WAVEFORM OF EACH SECTION Play the track 2 of test disc YEDS 18 DC range Center Ground level Tracking error signal Focus error signal TP102 pin 1 TP102 pin 2 0 5V div 0 2V div 2ms div 2ms div TP RF 1V div 9 div TP104 pin 1 FL drive signal 1V div FS102 pin 1 20 us div 2V div 2ms div DATA waveform DAC OUTPUT 1V div IC110 pin 16 5 ps div 1 V div 1 ms div s op gt ede 0141S A0SKSF 44066 peura 194300 NOI Ldi32 S3Q 716525515 Vt00000S6 ON LUVd 2092 1092 T09M ON NJA quvosg Id TYNINYAL INdLNO ysng olSS TII SIN 87995055 9421 S ACPA 066 615554558 10j12ede5 890212 eqni 118359 01114 TOVWD 081624 10 FEISSI 10 501622 sapoiq EZIZ 0075256 0282106 5103515022 ZOFTXS 89012 7130095 15109226 591 NOILIIUIS3A 1uVd 625 5 105 65 1062 10514 8050 1054 20609 1080 60621 10801 qdVv09 Id LINIAUI AVIdSIG 38 2 0928217 7 1 SI NVLLSEIT BOLDI H H 1 90535 020 3H 2 1 06181957621 9 4 2510 AV 1d
9. Does FRF signal turn at high level IC101 check Focus detector check Pickup trouble Turntable height check Does the disc start to turn clockwise Yes IC101 pin 1 Does FZC signal Focus error detector turn at low level check IC101 IC102 Disc motor circuit check Disc motor trouble Continue on the next page 28 No Focus servo circuit check check RF _ gt Adjustment miss Focus balance gain Is there RF signal Tracking servo circuit check Feed motor circuit check Pickup trouble Adjustment miss Tracking balance gain RF signal check PLL circuit trouble Disc motor circuit Disc motor trouble Does WQ signal turn at high level IC107 check Microprocessor IC112 trouble Magazine detector circuit SW1 Does the indication on the display light on light on and off a Dw Does the disc number indicates light on and off IC112 pins 44 and 317 check Are the pin 17 20 of IC112 OK IC 112 check IC114 IC115 Disc trigger motor and disc loading motor check 29 PRINTED CIRCUIT BOARD PARTS LIST MAIN CIRCUIT PC BOARD CIRCUIT NO IC2 IC10 1 102 1 103 IC104 IC105 IC106 IC107 IC108 1 109 IC110 111 IC112 IC113 1 114 1 115 1C301 IC401 Q1 92 03 Q4 Q5 96 07 Q8 Q
10. F 10V Elect 0 474 F 50V Elect 1 F 50V Elect 1 uF 50V Elect 104 F 16V Elect 100 6 3V Elect 33g F 16V Elect 22u F 10V Elect 104 F 16V Elect 47pF 100V APS 100 6 3V Elect 220 uF 6 3V 104 F 16V Elect 220 16 Elect 100 F 35V Elect 220 F 16V Elect 47 u F 16V Elect 2200PF 5 50V Mylar 39000PF 5 50V Mylar 47uF 50V Low leakage elect 4700PF 5 50V Mylar 3300PF 5 50V Mylar 4T u F 50V Low leakage elect 2200PF 5 50V Mylar 22 1kchm 1 4W Metal 22 1kohm 1 4W Metal NO6HR100K BD Semi fixed NO6HR47KBD Semi fixed NO6HR47KBD Semi fixed NPLG 6P134 NPLG 6P120 NPLG 4P132 NPLG 8P136 NPLG 5P135 NPLG 2P130 NPLG 9P137 NPLG 5P133 3P 7P oP 10P STTB 8C BC Tapping NOLLVHOdHOO OAHNO 29 9 1 11151 OOPEISZ 2110 SI WNVZISEO 996 52 1110 MS ILOW 340 H3MOd MS 9NILOW SLAW 6 80 LON HO 5510 SHIV3HS AZ 9VZ9 40 OZ 9Z1A 10 22252 OZOEWA 01121 XOIVZ9 40 53012191 510 98592262 1300 83040 ONIAVId IHL 193130 9 6 7 9 1121 4010S IF 409 4252 FOI 100 LON 2610 4 16 304 9NI23H2 SOBENA 10151 52999 1 90 21 1121 5 669 1 60121 3626154 1121 H308 2510 9NIAVnd IHL 193130 GMS OIS WOS walang YANI ONILL3S 2610 3HL 123130 tS HLV3HS O4 NI 8 5
11. G Grid P Anode NP No pin 7 g G6 Pf Pi G5 Pk G4 NP G4 G3 NP Pin No Connection 400 LC3517AM 15 RAM Cotumn 1 0 olumn Decoder 1407 remote control sensor GNO OUT Memory Motrix u 285128 E 05 YM3805 Signal processor amp controller EFMI EFMX EFMX SYEQ LJ DM DM L FCX L FZC FRF O KP KP TROF TRGL TRHO HF TER FEM FEM FEOF U CK DATA DSY 7 DI D8 RAM AO Ar A U wE 92 sosy soo C OTFLG O PCO VOX ADJUST INTEGRATAR HYSTERESIS voD vss TESTA TESTB TESTC u q TESTD TCL SLICE LEVEL VCO CLOCK OSCILLATION CONTROL CLOCK CONTROL SYNCHRONIZATION DETECTION SUB CODE SUB VFSY EFM SEPARATION nd DEMODULATION QCRC RR DISC SERVO CLV CONTROL DIN 1 COM INTERFACE LL DOUT FOCUS SERVO I R W CONTROL CIRCUIT L wQ SCK TRACKING SERVO FEED SERVO CONTROL m REFERENCE CLOCK LJ OSCILLATION LL XOUT TIMING CONTROL II XFSY EFM DEMODULATIO SIGNAL BUFFER RAM ADDRESS CONTROL CIC2 ERROR DETECTION CORRECTION FLAG TA CONTR 4 DAC OUTPUT 2 DAC DIGITAL FILTER eouT async INTER FACE 7 DEP 79 80 27 29 30 31 33 35 37 39 36 38 39 13 15 5
12. focusing servo s capture range is only approximately l0 m so when the objective lens is being moved up and down the above mentioned servo on off switch must be controlled to close the loop when the point of focus of the laser beem is positioned precisely 5V 10102 4 gt 8159 amp 3 FZC u AD 7 d 8196 577 22 g R151 8163 966 Se T 124 0107 1C104 vee 0 3 FOCUS COIL 152 amp er 5 gt o 29 e FOCUS ON OFF A U 2 8 OK gt mS Fig 1 start Servo LSR Laser i FCS Focus search Focus output Zo M Focus error TUE FZC Focus zero cross i FRF Fig 2 When start FCS signal integrating wave is passed via R171 to IC104 pin 7 and shifts the object lens up and down As result FE signal figures the sine curve The zero cross point reference voltage is determined by R157 and R156 is the just focus point FZC signal IC 102 pin 2 falls when the zero cross point is detected According to this timing FCS IC107 pin 13 changes to LOW and Q107 transistor switch shuts off closing the servo loop Fig 2 illustrates the timing The dottod lines show the wavefor ms produced by focus capture errors 10 OPTICAL 1 101 PICKUR 6 gt 1 a D e amp I L J 2 Tracking Servo Circuit This control ci
13. so that you do not touch the surface of disc Remember that the side of the disc with the rainbow reflection is the side containing the audio information Do not attach tape or paper to the label side of the disc and always be careful not to leave fingerprints on the side that is played Storing Compact Discs Store Compact Discs in a location protected from direct sunlight high heat and humidity and extremely high and low temperatures Discs should never be left in the trunk or interior of an automobile in the sun since the temperature can become very high in such a closed environ ment Always store Compact Discs in the holders in which they were sold Never leave a disc in the player s disc holder for a long period of time Not this way e Cleaning Compact Discs Before playing a disc wipe off the playing surface with a soft cloth to remove dust and other soil Wipe the surface in straight lines from the center of the disc outward not in a circular motion as you would with a phonograph record Do not use benzene chemical cleansers or phonograph record cleaning solutions to clean Compact Discs Also avoid static electricity prevention solutions since they can damage the surface of Compact Discs Problems Caused by Dew Dew can form inside a Compact player when it is brought from a cold environment into a warm room when a room is rapidly heated and if a player is left in a humid environ ment This dew can prevent t
14. we ud ee lw wu amp wo x F amp F Fr Ie t W 000000 o on FEM 12 94582 97 s A2L 10 43 A3 044 wE Jo 51 A4 C45 5 1046 6 047 1048 ABL 049 1050 Atl 1042 79 x IN and 80 OUT 8 EFMI 7 EFMX and 6 EFMX 13 O 5 L_JO 52 DX C400 ZZ 240008 0 gt Ww gt gt gt gt 0 own oO 40 4 65 JaouT 10 62 AlOL Jo 53 OTFLG 1 63 QSYNCL JO 64 rm Clock Oscillator 8 6436 2 EFM External Circuit 4 PCO 3 VCO1 2 VCOX Clock Regeneration Circuit SYEQ WYNC Match Signal 27 CK 28 DATA and 29 DSY 30 SUB 31 VFSY and 33 35 WQ 36 R W 37 DOUT and 39 SCK FM Demodulation Signal Check Output Sub code Output Q code Output related Pins 36 R W 38 DIN and 39 SCK COM Command related Pins Input 14 FZC 15 and Output 13 FCS 11 12 16 17 19 23 24 26 40 42 61 34 66 67 69 71 63 64 65 68 76 77 bo cn A oo 8 18 69 71 Focus Servo mechanism related Pins 11 DM and 12 DM Input 16 HF and 17 TER Output 19 TROF 20 TRGL 21 TRHD 22 KP and 23 24 FEOF 25 FEM and 26 FEM 40 0 53 10 51 WE 52 and 5408 6101
15. 0 988 1033 Tel 201 825 7950 PN 0M3306 NS807 Printed J 40
16. 52 v 5815512010 210 2 eo awe dl Tw MS 440 NO 7041 90 BIYSZIN 60 9991052 20 3015 0333 MS 440 NO GH amp l A9 Gv29 089920 110 GIEIVSZ 10 u 2 m X 4V29 40962 21 Ol 8Q 208 46 22 IOVW9 900 Sz9v9v1 900l 018931 501 vOIDI S29v9v1 0l 2015I 202214 20 121 155120 601 20 009252 201 901 SON FOIO 60l02XO 0121 5 9 WVYDVIG SILVINSHOS I 9 V 35 SCHEMATIC DIAGRAM CONTROL SECTION 400 DISPLAY 504 STOP EJECT DISPLAY i E non MEMORY SKIP SKF X u SW520 25 509 a sw502 Xt PAUSE MEMORY SEARCH i MNT 88522 0 0 5 2 ER 2 une 58526 BEP 6 ND 3 DISCS DISC4 DISC3 DISC2 DISC 5 7 6 m o 2 161 Q oon 288 H MEMORY PLAY O K3 25 REPEAT FULL SINGLE LAP REMAIN RANDOM PLAY 2 Ka d 5 a 0501 502 502 T 34 DISPLAY ON TIMING SW M P 25 REMOCON he s Ar 3 GMAO ISSI33 Q50 25 3400 0502 25 1346 SX600 i 501 33k IC502 BX1407 R502 33 1 2503 3365 2 4 99 5 99 6 gt 7 es gt 0 er 2 SIRSIE 33k o 8 Bross Q 94 9
17. 8 Mechanism exploded view 2 2 2 nn nn 19 Parts list 20 CD mechanism exploded view 2 22 nn 21 Magazine exploded view 22 Adjustment procedures o 2 2 a 404040 23 Troubleshooting guide nn a nn 27 Printed circuit board parts list 30 Main 2 30 Display circuit 2 2 37 38 Printed circuit board view 3l Main circuit sss 1 Display circuit 37 28 Schematic diagram 2 33 Waveform of each section 36 Block diagram 89 Packing view a les 40 SERVICE PROCEDURES 1 Safety check out After correcting the original service problem perform the following safety check before releasing the set to the customer Connect the insulating resistance tester between the plug of power supply cable and chassis Specifications more than 10Mohm at 500V 2 Procedures for replacement of flat packaged ICs 1 Tools to be used 1 Soldering iron Grounded soldering iron or soldering iron with leak re sistance of 10 Mohms or more Form of soldering iron s tip ZI _ 2 Magnifying glass for checking of finished works 3 Tweezers for handling of IC and forming of leads 4 Grounding ring Countermeasure for electro Static
18. 9 Q10 Q101 Q103 Q108 Q110 Q104 Q107 111 Q112 Q301 Q401 Q302 Q402 D1 D4 Ds D6 D D8 D10 D9 Dil Di2 D13 D14 D15 D101 D102 D105 D106 X101 X102 L101 L102 L301 L401 PART NO ICs 22240097 22240098 222886 22240103 22240034 22240103 222975 22240032 22240104 222969 22240103 22240208 22240209 22240101 22240103 Transistors 2213486 2213315 2213495 2213505 2212570 221243 2212570 2210738 or 2212485 2210738 2212115 2212485 or 2212486 2212570 221243 2212570 2210738 or 2212486 2212286 Diodes 223177 223178 or 223179 224990013 2243283 2243183 or 2241011 2243152 2243152 or 2240952 223180 or 223163 2243163 or 2240972 2243213 or 2241071 2243201 223181 223163 or 223180 223180 X tal 3010125 Osc element 3010146 Coils 232145 231135 231136 DESCRIPTION 5 79101 5 78101 20109 LA6462S LA6510 LA6462S YM3805 LC3517AM 15 LA6393S YM3020 LA6462S SX 400 PST529E 2 546411 LA64625 25 1319 25D1666 S 25D1682 S 25B1142 5 29C3400 25A 1346 25C3400 25C536 G AUD or JC501 Q 25C536 G AUD 25 2458 501 0 or JC501 R 25 3400 25 1346 2563400 29C536 G AUD or JC501 25C2878 B 1SR35 200HP DS135D or 1SR35 200A GZB5 6C MTZ20C MTZ7 5C or GZA7 5X MTZ5 6B MTZ5 6B or GZA5 6Y 01 or 155133 MTZ6 2C or GZA6 2Y MTZI10C or GZA10X MTZO9 1A SVC211SP C Variable capacitor 155133 o
19. 976 27300977 27300978 27300979 27300980 27300981 27300982 27180351 27180352 833420068 830430068 29360935 27262447 DESCRIPTION Cover top Cover bottom Case lever Guide Frame Cover front Cover side Lever mechanical Lever eject Lever manual A Lever manual B Cam Stopper Pin Wire spring Compression spring 2TTP 6B BC Tapp ng screw 3STC 6B BC Tapping screw Label top Plate 22 ADJUSTMENT PROCEDURES Instruments required Millivolt meter Oscilloscope Frequency counter Use the high impedance probe 10 1 Jitter meter AF oscillator and 2 channel AC voltmeter Grating adjustment driver Test 1 5 YEDS 18 SONY and 5A PHILIPS B P F Refer fig l Error rate detector jig Refer Fig 2 Sockets 2P TP101 TP102 5P TP104 and 9P TP103 Resistors 22kohm 220kohm and 100chm Shorted clip DX C400 XFSY 1C2 TC4069 SUSY 2 4013 CD C4 TC4013 EFLG 3 GND Fig 1 B P F 1 Hight of turntable Adjust the adjustment screw so that the distance between the turntable and chassis becomes 9 3 0 05mm 2 Disc motor vertical angle check 1 Load test disc YEDS 18 and initiate play Connect a millivolt meter to TP 103 pin 7 focus actuator drive waveform and pin l ground Confirm that the difference between the outermost and inner
20. BOLOW YO LOW 9 1104 2510 30 HSINId 3H1 123130 EMS 13S avon Es 123135 2510 ONIMNHD DSI 30 HSINIJ 193130 ZMS 2108700 5858 9 11 136 3NIZVOVW 3Hl 123130 IMS 1 010 52 NOILdIN2SIO NOILINN4 1211MS 2 09 588 60 02 M sado 4 2 mm va AA AA Aa rer D 13533 0110 OObS 00000000 48 529 9 1 BLEZISE Addns YBMOd 10 AOS OOI 40 115 El 2 51 IZOAS J 9912 ASIOI 2012 99 u N 5 NS WOHJ 2 I O 2 AOC OO 185 22 Al xe Es cha BU OO QQ 1 8 o 022 6 2 1000006 4 42 5 EE AI O0 di cx Exo b C MS MS 33O NO AOOv 100 10 22 10882029 00016 430 03343 9010 eat SIT on A 9 001 e RC B FC504 S FROM DISPLAY FROM DISPLAY 8 FCSO3 P C B FCS502 20154 o FROM DISPLAY MS 330 0203 2010 9 20189 zone 84 8 WS 2 33551 290 Nom ino vo 8 2 1HO9 A O2I2V N 2 Addns YBMOd Sb ze 035 22 205 9 211111 00960252 1290 80121 ee nt 852 22 X3MOd 046150 28910
21. DX C400 SERIAL NO 3306 ONKYO SERVICE MANUAL COMPACT DISC AUTOMATIC CHANGER MODEL DX C400 Black model BUU BUUX SAFETY RELATED COMPONENT WARNING COMPONENTS IDENTIFIED BY MARK N ON THE SCHEMATIC DIAGRAM AND IN THE PARTS LIST ARE CRITICAL FOR RISK OF FIRE ANDELECTRIC SHOCK REPLACE THESE COMPONENTS WITH ONKYO PARTS WHOSE PART NUMBERS APPEAR AS SHOWN IN THIS MANUAL MAKE LEAKAGE CURRENT OR RESISTANCE MEA SUREMENTS TO DERMINE THAT EXPOSED PARTS ARE ACCEPTABLY INSULATED FROM THE SUPPLY CIRCUIT BEFORE RETURNING THE APPLIANCE TO THE CUSTOMER ONKYO AUDIO COMPONENTS BUDN BUD 120V 60 Hz 110 120 220 240V AC 50 60Hz SPECIFICATIONS Audio Characteristics Number of Frequency Response Signal to Noise Channel Separation s Total Harmonic Distortion Wow and Flutter Ouptut Level Signal Format Sampling Frequency Quantization Filter IJI 04 a 404 4 0 4 04 0 14144 4 0404 4 a 4 4 4 4 04 40 04 42 4 3 3 4 4 Disc Tracking Pitch Play Tracking 6 4
22. T NO DESCRIPTION REF NO PART NO DESCRIPTION 1 27110452 Front chassis ass y 42 27150260 Shielded plate 2 27211017 Front panel ass y 43 21150261 Shielded plate 3 27215147 Decoration plate 44 27150262 Shielded plate 4 27215148 Decoration plate PTI 2300257 ANPT 971D Power transformer D 5 27215149 Decoration plate 2300258 ANPT 971ADGQ Power transformer 6 27301167 Door lt PX gt 7 27301011 1 Top lid PCBI 24505246 Main circuit pc board ass y 9 27301012 1 Bottom lid PCB2 24505248 Output terminal pc board ass y 10 27301010 Base ass y PCB5 24505247 Display pc board ass y 11 21130488 Bracket SW101 25035295 Power switch 12 27130489 Bracket Cl 3300001 A 0 01uF 400V Capacitor IS 13 27130490 Bracket C23 3300005 A 470pF 400V Capacitor IS 14 27121160 Back panel lt D gt 51 831430068 3TTW 6B BC Tapping screw 27121161 Back panel PX S2 838430088 3TTB t8B BC Tapping screw 15 270280 ASR 4K U Strainrelief S3 830130069 JITC 6C BO Tapping screw 17 27130491 Bracket 54 833430109 STTP 10C BC Tapping screw 19 27180416 Torsion spring 55 834430148 STTS 14B BC Tapping screw 22 253112 A AS UC 4 Power supply cord S6 838430068 3TTB 6B BC Tapping screw 28 28323538 Knob power 57 82143006 3P 6FN BC Pan head screw 29 27273110 Joint S8 838440109 4T TB 10C BC Tapping screw 30 27270214A Spacer 27130523 A Protector Cord clamper PX 32 28140788 Base 24505210 A Voltage selector switch PX 33 28323539 Knob Note lt D gt Only 120V mo
23. are then input to IC107 pins 15 and 16 The FRF signal indicates when focus is applied When high focus is on The HF signal detects the mirror sections between adjacent disc pits scratches etc It is used along with the FRF signal to control an array of switch timings during disc access R149 I C105 1 521380 a Eo FEED D 9 MOTOR a 4 cr Fig 6 12 4 Feed Motor Circuit This servo circuit moves the entire pickup assembly from the disc s hub to its outer edge ensuring that the objective lens stays close to the optical axis C132 C133 etc remove low frequency elements from the tracking drive s output It then passes successively through pins 4 and 1 of IC105 and then drives the feed motor Q108 is the transistor that turns the feed motor on and off It is controlled by the FEED OFF IC112 pin 22 signal Motor fast forward and reverse are initiated by EFM feed motor and EFM feed motor signals input into pins 3 and 4 of IC105 for smooth disc access 5 Disc Motor Servo Circuit This servo consists of PLL circuit which extracks the clock signal from the RF signal the pickup reads from the disc and a circuit which controls the disc motor based on this clock signal 5 1 PLL Circuit The PLL circuit consists of VCO LPF and a phase compa rator in IC107 as shown in fig 7 The 8 6MHz VCO oscillator output is divided in half inside IC107 The phase of the RF signal and waveform shaped EFM si
24. breakdown 5 Nipper for removing defective IC 6 Small brush for application of flux 7 Enamel line 2 Work Procedures 1 Remove the defective IC A Cut all leads of the defective IC one by one using a nipper and remove the IC B 1 An enamel line has been pierced between the legs of the flat package IC 2 Use a soldering iron to unsolder the legs one at a time 3 Repeat the procedure of 1 and 2 above for the 3 sides only While holding the soldering against the enamel line pull in the direction of the arrow 2 Clean the pattern surface of the PC board Get rid of the remaining leads and solder 3 Check and from the leads of the new flat pack aged IC to be installed From every lead on the new IC using a pair of tweezers so that all of them are aligned neatly without being risen twisted or inclined toward one side Especially the rising portion of every lead must be formed with greatest care IC x IC IC lt Rising Twisting Inclining 4 Apply flux to the PC board Apply flux to the pattern surface of the PC board which has been cleaned as shown in the illustration The area to be applied with flux is the portion of about 2 5mm in width where the IC s leads are to be soldered Be careful to apply minimum amount of flux required so as not to smear it on unwanted areas About 2 5 mm 5 Temporarily tighten the IC Carefully align the pattern and IC s l
25. del 34 28323540 Knob lt PX gt Only PX model 39 28323541 Knob DISC 36 28323542 Knob DISPLAY NOTE THE COMPONENT IDENTIFIED BY MARK A 37 28323543 Knob PLAY ARE CRITICAL FOR RISK OF FIRE AND 38 28323544 Knob MEMORY ELECTRIC SHOCK REPLACE ONLY WITH DISASSEMBLING PROCEDURES Changer Mechanism Remove the top cover Remove the bracket on the front panel Detach the 7 connectors leading to the PC board from the mechanism PARTS NUMBER SPECIFIED PLATE SIDE A Remove screws A and B 0 Pull plate side forward and remove screws C and D PLATE SIDE B If plate side A is facing the opposite direction remove it from screws 7 C and D LEVER CD Mechanism Remove the changer mechanism Remove the 4 screws holding the bracket mechanism and CD mecha nism to the underside of the changer mechanism section Fig 33 17 PLATE SIDE B PLATE SIDE A LE VER GEAR RING Fig 34 EXPLODED VIEW 18 Q x MECHANISM EXPLODED VIEW 19 400 PARTS LIST REF NO PART NO DESCRIPTION REF NO PART NO DESCRIPTION 27100142 Chassis 74 8761401610 WAX16F Washer C2 21262450 Plate upper C75 8761400810 WAX8F Washer C3 21300951 Lever C76 8761201005 W2 10F Washer C4 27300952A Arm slide C77 82142004 2P 4F BC Pan head screw C5 27300953 Lever C78 89302015 ES 2S Ring E 6 21300954 Beli C80 27270231 Collar C7 27260234 B
26. ds issued by microprocessor 12 2 3 TER Circuit The TE signal output from IC101 pin 17 is input to IC103 pin 4 After being run through a comparator at the ground level it is output from IC103 pin 2 and input to IC107 pin 17 The TER signal is one of the switching timing signals mentioned in the previous paragraph IC103 103 DX C400 5 FEED TER R127 R129 R135 C120 S TRACKING Q104 COIL C18 R128 IL 4 2 a 3 2 Kick pulse Brake pulse KP MEM High frequency cut KP Tracking drive output 2 4 Track Kick Circuit This circuit is used to move the laser beem to a target pit over relatively short distances approximately 1 100 tracks during such operations as disc access and cue review In con junction with the on off switching discussed above it sends positive and negative kick pulses KP KP to pins 6 and 7 of IC106 Thereby shifting the track coil by the desired amount The timing is determined by signals such as the TER signal and HF signal Fig 4 illustrates the timing during a typical kick operation forward 11 0 400 9 RF u lt a 15 5 R102 RIO 6 2 FRF IC107 15 c sci ON 7 S HOLD AMP gt gt gt FOCUS OK gt gt 0 O FOCUS COMPARATOR w A B C D AMP O12 PEAK MIRROR To D a BOTTOM 12
27. e Microprocessor IC112 IC501 Fluorescent tube Reset circuit IC113 Q113 Does the indication on the display light on No sound nn Is the power supply of audio circuit normal Power supply circuit IC1 M5F7910L 1 2 M5F7810L Check C301 pin 1 or IC401 pin 9 gt 10V IC401 pin 5 gt 10V Yes Does the muting release IC112 pin 23 is low Muting circuit Q8 Q9 Q10 Q111 Q112 Is there Data output signal IC107 pin 65 Signal processor IC107 YM3805 or RAM IC106 LM3517AM 15 DA converter and filter circuit IC110 YM3020 IC111 LA6462S 27 Magazine detector circuit SW1 8603 Power supply circuit check 400 DX C400 Does not lead in lon Inside sw No 16 Feed motor circuit Does IC112 pin 16 Inside switch start switch turn at high level Microprocessor IC112 Microprocessor IC112 Reset IC IC113 check Pickup slide check Pickup mechanism Does pickup returned to innermost Does the laser light Is the emitter voltage of Q3 Q7 Q6 and D11 check Is there th drive signal to IC107 pin 13 the object lens move to up and down sides 1 107 YM3805 check Focus search circuit check Q109 2 Pickup trouble
28. eads so that the IC will be temporarily tightened to the pattern on the four leads at the corners At this time sol dering is required but no need to apply soldering material 6 Apply flux to IC s leads Apply flux to the areas of IC s leads where soldering is to be performed Be careful not to smear flux on the root portion of any lead or the body of IC Apply flux only to this portion 1 QUUM ha 7 Soldering While attaching the tip of the soldering iron to the soldering point as shown in the illustration feed 2 5mm of soldering wire Then slowly move the iron in the direction indicated by the arrow in the illustration so that the leads will be soldered to the pattern Move the iron in the rate of approxi mately lem in 5 Proceed with your work while confirming a clean fillet of solder is formed on each lead subsequent to the melting of flux Soldering wire Soldering iron CAUTION 1 2 8 you move the likely to result Be especially careful when soldering the first lead where loose soldering is most liable to be formed Check the results When soldering of all leads is finished check the soldered portion on every lead with a magnifying glass A tester must not be used or checking of any soldered position iron too quickly loose soldering is 3 400 NOTE COMPACT DISC e Holding Compact Discs Hold Compact Discs by the edges
29. gnal edge are compared and the result output through pin 4 When this signal is added to the VCO the synchronous signal detected by the EFM is matched to the synchronous signal of the internal counter of 107 5 2 Disc Motor Circuit The disc motor is controlled by DM disc motor and DM disc motor commands output from pins 11 and 12 of IC107 The opamp IC104 performs phase correction and amplify the signals which are then sent to the disc motor 6 RF Signal Waveform shaping Circuit This circuit shapes the RF signal and converts it into a binar y value However since asymmetry i e lack of symmetry between the top and bottom of the RF siganl which can adversely affect the DC balance caused by dispersion during disc manufacture cannot be eliminated by AC linking alone DC components from the EFM eight to fourteen modulation signal are fed back after shaping for slice level processing 7 APC Circuit By means of feedback from the monitor this circuit controls the light output due a bad condition resulting from the tem perature characteristic of the laser diode This circuit is included into the pickup unit 13 COMPARATOR OUTPUT Fig 7 R187 R189 C129 AUTO ASSIGNMENTARY CONTROL AMP Fig 9 400 DX C400 KEY MATRIX OPERATION KEY 0501 ma ova awa an EE m ows m WER ava on V 8 Microprocessor Peri
30. he laser pickup from reading the data contained in the pits in the disc surface If the player does not operate properly because of dew remove the disc and leave the player s power switch on for about one hour to remove all moisture 400 PROTECTION OF EYES FROM LASER BEAM DURING SERVICING This set employs a laser Therefore be sure to follow carefully the instructions below when servicing WARNING WHEN SERVICING DO NOT APPROACH THE LASER EXIT WITH THE EYE TOO CLOSELY IN CASE IT IS NECESSARY TO CONFIRM LASER BEAM EMMISION BE SURE TO OBSERVE FROM A DISTANCE OF MORE THAN 30cm FROM THE SURFACE OF THE OBJECTIVE LENS ON THE OPTICAL PICK UP BLOCK CERTIFICATION LABEL This label is located on the back panel CAUTION SHOCK PAARD 2 RISQUE DE ZHOC ELEZTPIQUE u ie Laser Diode Properties Material GaAS GaAlAs Wavelength 790nm Emission Duration continuous Laser output max 0 2mW This output is the value measured at a distance about 2mm from the objective lens surface on the Optical Pick up Block Photo 1 CAUTION ON REPLACEMENT OF PICK UP The laser diode in the optical pick up block is so sensitive to static electricity surge current and etc that the com ponents are liable to be broken down or its reliability remarkably deteriorated PRECAUTIONS During repair carefulley take the following precautions The following precautio
31. her E18 82142002 2P 2F BC Pan head screw C37 27301015 Case lift A E19 27300985 Worm C38 27130495 Frame E20 27300988 Stopper thrust C39 21300966 Sensor E21 27180359 Coil spring C40 27262456 Plate E23 27300986 Gear sled C4 24506741 Special screw E24 27300987 Gear worm C43 27300968 1 Base trigger E25 24506739 Special washer C45 27300969 1 Lever E26 82142604 2 6P 4F BC Pan head screw C46 27300970 1 Lever B 24505252 6P Socket ass y C47 27262457 1 Plate 260208 Binder C48 27300971 Lever eject C49 24505185 Leafswitch C50 27130486 Bracket B Lubrication C51 27130487 Bracket A A DYNAMAX EP 2 C52 27180346 Coil spring B MOLIKOTE EM50L C53 27180347 Coil spring C FLOIL GP 670 C54 27180348 Wire spring E FLOIL G 31KB C55 27180349 Torsion spring C57 24506742 Special screw C58 24506743 Spacer C59 24506744 Special washer C60 24506745 Special screw C61 82143015 3P 15FN BC Pan head screw C62 82142604 2 6P FAF BC Pan head screw C63 830430068 3STC 6B BC Tapping screw C64 833430080 3TTP 8P BC Tapping screw C65 838430088 3TTB 8B BC Tapping screw C66 838430068 3TTB 6B BC Tapping screw C68 838426088 2 6TTB 8B BC Tapping screw C70 833420080 2TTP 8B BC Tapping screw C71 833420068 2TTP 6B BC Tapping screw C72 24506781 DM 15 CD mechanism C73 24505198 Cushion damper 20 CD MECHANISM EXPLODED VIEW 21 MAGAZINE EXPLODED VIEW PART NO 21300972 27300973 27301016 27267510 27130496 27300974 27300975 27300
32. ift resistor and time generator 4 High potential side reference power Low potential side reference power GND Since the same resistance is inserted between the RBH pin and the internal power supply and between the RBL pin and the internal Vss GND power supply a high precision voltage of 1 2 Vpp can be obtained when both pins are connected This voltage is applied on the MP pin through the buffer operational amplifier As in the Case of the basic circuit the drift from 1 2 Vpp can be corrected by providing an appropriate external resistance on either one of the two pins MP An exponential analog shift is executed with the potential applied on MP as the reference Normally bias is appoied for 1 2 TO BUFF Analog output of DAC is input to buffer operational amplifier Common input of analog switch for CH1 and CH2 1 Normal operation 0 Will become no signal output regardless of D signal Sample hold analog switch output for CH2 PST529E 2 Reset LA64628S Opamp 0 0022 0 0 15V is rdf E 9 36k 390k Wh 4 9 1 Input 2 Ground 3 0 utput 5 MC VEE VIN2 YIN Youtz Yee LA6510 Power opamp LA6393S Comparator aa ST UT GI BI 19 2 z zz wu z gt gt gt gt 0
33. in this tolerance adjust with L102 Ground Tracking feed l Tracking offset on 2 TDI Tracking actuator coil drive 101 TP102 TWR Focus actuator coll drive FDI FPI 1 TE 2 FE DI Lm tj V ou gt TP103 25 STEP ITEM MODE ADJUST ADJUST FOR CONNECTION OUTPUT INDICATOR 4p vco STOP Lio 1322 0005M HZ TP VCO Frequency counter 3 FOCUS BALANCE PLAY SVRIU Minimum TP RF Jitter meter or oscilloscope 8 FOCUS GAIN PLAY SVR105 Pin7 Pin9 16 ldB Fig 3 2ch AC voltmeter P TRACKING DALANCE PLAY SVRIOl Less than t25mV Fig 4 Millivolt meter 8 TRACKING GAIN PLAY SVR104 Pin6 Pin5 19 dB voltmeter u 9 TRACKING OFFSET STOP SVR103 Less than 25mV Figs Millivolt meter 10 sA NOISE _ PLAY SVR102 Less than 100Hz Fig 7 Frequency counter SVR102 TP103 SvR101 GND D 548105 n3 P L 2SVR104 TP101 102 SVR103 id 26 Adjustment point TROUBLE SHOOTING GUIDE Does not indicate on the indicator tube Turn the POWER switch to on 8 light on Is the power supply normal Q1 Q2 Do the segments g of TRACK NO and TIME on the indictor tube indicate Pe Sn 77 Insert the magazin
34. most is within 300mV 2 If the Above condition is not satisfied adjust the height of the turn table to within a tolerance of 9 20 mm 3 Grating adjustment Note Proceed the this adjustment when the optical pickup has been re placed l Connect pins 1 and 2 of TP 101 to the oscilloscope X and Y axis respectively Initiate play 2 Set the oscilloscope range to 0 1V div lOgsec div and check the E signal pin 2 against the synchronization signal Refer Photo 1 3 If the F synchronization signal is 30 sec later than E continue with the adjustments described in step 5 below 4 If you are unable to confirm the F synchronization signal switch to track off short TP103 pins 6 2 and 1 and perform a temporary adjustment of the point where the synchronization signal appears by turning the grating adjustment screw 5 While still in track off status switch the oscilloscope to X Y and adjust the grating adjustment screw so that a 180 phase shift is achieved Refer Photo 2 6 When you switch back to track on and the Lissajous becomes point confirm that F from 101 pin 1 is 30 sec later than E from TP101 pin 2 7 23 Fig 2 Error rate detector jig 9 340 O5 mm Adjust screw Mechanism Chassis Fig 3 10us div F synchronization signal Photo 1 50ms div X Y Photo 2 DX C400 4 VCO frequency adjustment Connect the frequency co
35. ns are included in the service parts 1 Ground for the work desk Place a conductive sheet such as a sheet of copper with impedance lower than 10290 on the work desk and place the set on the conductive sheet so that the chassis 2 Grounding for the test equipment and tools Test equipments and toolings should be grounded in order that their ground level is the same the ground of the power source 3 Grounding for the human body 4 Select a soldering iron that permits no leakage and 5 Do not check the laser diode terminals with the Be sure to put on a wrist strap for grounding whose other end is grounded Be particularly careful when the workers wear synthetic fiber clothes or air is dry have the tip of the iron well grounded probe of a circuit tester or oscilloscope IC BLOCK DIAGRAM AND DESCRIPTIONS CX20109 RF amplifier RFI FOK FOCUS OK COMPARATOR VOLTAGE CURRENT REFERENE REFERENCE s MIRROR DIFFERENTIAL 3 AMP PEAK amp BOTTOM i FOCUS OK AMP MIRROR 1 BUFFER AMF V RF _ SUMMING AMP MIRR RF COMPARATOR 20 EFM gt ERROR AMP AUTO ASSIONMENTARY CONTROL ASY SEL FE FEC j BB REPEAT SINGLE J LAP 4 I I x s 5 6 Filament
36. on If plate side A and plate side B are operating in the opposite direction of the disc loading operation disc eject operation takes place When the disc chucking is cancelled the disc is raised and returns to a designated slit in the magazine With this action the disc eject operation is finished 3 Disc Select Operation Disc selection occurs when the base trigger is moved up and down by the DC motor operation There are six slits corresponding to Nos 1 6 of the base trigger When the DC motor is driven and the special screw rotates the 4 Magazine Eject Operation The magazine is held inside the mechanism by a stopper When the base trigger has been lowered to its lowest position When the sensor find the slit for eject the stopper is pushed down and the stopper is detached from the magazine The magazine pops up by means of a spring When this occurs the magazine eject operation is finished base trigger is moved up and down When the sensor find the designated disc slit the base trigger is brought to the designated disc position When this has taken place disc selection is finished PLATE SIDE B ft PLATE SIDE A MAGAZINE LEVER Fig 14 RING BASE TRIGGER DC MOTOR SPECIAL SCREW BELT Fig 15 SLIT BASE TRIGGER HOLE 777 SENSOR Fig 16 NO 2 oa 3c 4 c3 6 ca EJECT ca BASE TRIGGER MACAZINE STOPPER Fig 17 16 PARTS LIST REF NO PAR
37. pheral Circuit 1C112 8 1 FL Display and Driver When data is sent from microprocessor IC112 pins 25 27 display operations take place through the micro processor IC501 which is used for driving fluoresccent character display tube 8 2 Key Input Operation The timing pulse is output by IC112 pins 41 48 while an 8X o matrix structure for key input is made up of IC501 pins 34 38 8 3 Remote Control Operation When the output of the optical reception module IC502 1407 is received by the pin 39 of IC112 data code opera tion takes place internally 14 5V 10107 SIGNAL PROCESSOR 8 Bow 5 CONTROLLER 5V 12 latin moror oa IC115 M TRIGGER MOTOR INSIDE SW O 9 1 SW3 7 5 5 5V SW6 1C109 PHOTO INTERRUPTER 5V Fig 10 8 4 Servo System control and Sub code Demodulation 1 112 Commands to the servo as well as information and subcode data etc are trensmitted serially between IC112 and 1C107 SO serial output From IC112 pin 29 to IC107 pin 38 Communicates command data from the microprocessor to the servo system 8 bit configuration slI serial input IC107 pin 37 to IC112 pin 28 Communicates servo system conditions and sub code data to the microprocessor 8 l bit configuration SCK serial clock From 1 112 pin 32 to 1 107 pin 39 Serial data clock Downshift R W Read Write From 12
38. pin 30 to IC107 pin 36 When sending commands from the microprocessor the sig nal becomes high level WQ Write request From IC107 pin 35 to 12 pin 31 When sending commands from the microprocessor the sig nal becomes high level 8 5 Changer Mechanism Control IC112 pins 9 15 and 17 20 are for mechanism control input and output SW1 Pin 15 detects with L H whether there is magazine or not SW2 3 Pin l4 when L and Pin 13 when H input whether the disc is on the turntable or in the magazine not on the turntable 5 4 Pin 12 tells the microprocessor with L H whether or not there is a disc SW5 6 Pin ll when 1 and Pin 10 when inform the mi croporcessor that the trigger is at its lowest level or in the opposite case at the EJECT level Also a detection signal from the photo interrupter is reshaped by IC109 and sent to the DISC SEL pin no 9 The inside switch turns on when the pickup is at its inner most circumference pin 16 of IC112 is low Pins 17 and 18 are ACTIVE LOW with the reverse control signal of the disc select motor At stop they are both high Pins 19 and 20 are ACTIVE LOW with the control signal of the disc load motor With stop they are both high 8 6 Other Controls Pin 24 With the laser diode control signal At high level pickup turns on Pin 23 With the audio muting control signal active High At low level there is output Pin 22 Turns the feed circuit of foc
39. r GMAO0I GMAOI KD1624F0A CSA4 5MG Ceramic P 7PAMN T 7TA FB 7G CIRCUIT NO C6 C7 9 11 C12 C14 C13 C16 C17 C19 C18 C22 C101 C103 111 112 113 C114 C118 C126 C131 C132 C134 C133 C135 C136 C141 C142 C143 C151 C152 154 158 157 160 C166 C167 C168 C171 C301 C401 C302 C402 303 403 C304 C404 C305 C405 C306 C406 C307 C407 R194 R196 R198 SVRIOLSVRI03 SVR102 5VR104 SVR105 CP101 CP103 CP102 CP104 CP105 CP106 TP101 TP102 TP103 TP104 FS101 FS105 FS102 FS103 FS104 30 Capacitors 352752229 352781019 352741919 352742219 352741009 352741019 352742219 352751009 352721019 352780109 322741009 352731019 352784799 352780109 352780109 352741009 352721019 352743309 352732209 352741009 370134704 352721019 352722219 352741009 391242217 352761019 391242217 391244707 371122224 371123934 392884707 371124724 371123324 392884707 371122224 Resistors 4000114 4000114 2210070 5210068 5210068 Plugs 25055150 25055136 25055148 25055152 25055149 25055146 25055153 25055149 Sockets 24505196 24505195 24505244 24505245 Radiator 27301171 Screws 838430089 DESCRIPTION 22004 F 25V Elect 100 uF 50V Elect 100 F 16V Elect 220 uF 16V Elect 104 F 16V Elect 100 F 16V Elect 220 F 16V Elect 104 F 25V Elect 100 6 3V Elect 1 F 50V Elect 104 F 16V Elect 100
40. racket shaft C81 838430068 3TTB 6B BC Tapping screw C8 27300955 Stopper thrust C83 27301178 Pin C9 27262451 1 Plate lower C86 27130512 Bracket C10 27300956 Roller C87 82142604 2 6P 4F BC Pan head screw 27300957 Stopper C91 24503161 Torsion spring C12 24502220 Bracket motor C94 27301080A Trigger C13 2450222 DC motor C95 27301169 Case lifter 24502240 C96 27301170 case ass y lifter C14 21262452 Plate C98 891030 CS 3S Ring CS C15 27300958 Lever reset 226033 GP1S52 Photo coupler C16 27262453A Plate side B 28140888 Sheet C17 21300959 Pulley El 27100180 Chassis C18 21300960 Gear E2 27260283 Shaft pick up C19 27300961 27130559 Bracket shaft C20 21130485A Bracket mechanism CD 4 87642607 W2 6x7F BC Washer C21 27301168 Fixture disc E5 833426148 2 6TTP 14B BC Tapping screw C22 27 300962 Lever gear E6 24505243 Optical pick up C23 24505183 Leafswitch 7 27301165 Rack C24 24505184 Leafswitch E8 27180415 Compression spring C26 27255002A Clamper E9 24506779 Special screw C28 27262494A Plate side A E10 24505186 Liafswitch C29 21300963 Lever 11 834426068 2 6T TS 6B BC Tapping screw C30 27180342 Plate spring E12 24502239 Motor C po22 C31 27301014 Case lift B E13 24506782 2 X2 5 Screw C32 27180343 Plate spring E14 21301166 rntable platter C33 27300964 Lever disc center 15 24506784 Special screw C34 27300965A Pin El6 97130561 Bracket assy sled C35 27180344 Coil spring E17 24502219 DC motor C36 24506740 Special was
41. rcuit moves the objective lens radially to keep the laser beem precisely centered in the tracks on the disc surface wich are only l 6um wide 2 1 Tracking Error Detector This unit uses a three beam laser pickup The error signal is obtained from the difference between the E and F output from both sides of a four section photodiode housed in the pickup T E tracking error F E The E and F signals are input into pins 8 and 11 of IC101 the difference is obtained by an internal opamp and the signal is output from pin 17 2 2 Phase Correctors Drivers The tracking error signal passes from IC101 pin 17 to IC103 pin 6 to IC103 pin 8 to IC105 pin 6 to IC105 pin 9 and drives the pickup tracking coil IC105 is the coil driver power amp C116 C118 C120 and C121 included in the circuitry are phase correctors which enhance servo stability semi fixed resistors SVR101 SVR103 and 5 104 are for ad justing servo balance offset and gain respectively The Q104 transistor switch is servo on off Q105 and Q106 transistor switches are for high frequency band on off loop gain switching etc and enhance the stability of transient operation when focus is on and during disc acsess The timing of these switches is determined by IC107 as follows TROFitracking off IC107 pin 19 FCS focus search IC107 pin 13 TRGL tracking gain low IC107 pin 20 TRHD tracking high down IC107 pin 27 The above signals are output by IC107 in response to com man
42. unter to VCO Use the high impedance probe 10 1 Adjust L102 so that the frequency counter reading becomes 4 322 9 OOM Hz 5 Focus balance adjustment Load test disc YEDS 18 and initiate play Connect the jitter meter or oscilloscope to TP RF When use the jitter meter Adjust SVR102 so that the jitter meter reading becomes minimum When use the oscilloscope Adjust SVRI02 so that a clear trace of waveform pattern as shown Photo 3 appear on the oscilloscope 6 Focus gain adjustment 1 Load test disc YEDS 18 ard initiate play 2 The band pass filter is passed through and AC voltmeter is connected at the pins 7 and 9 of TP 109 3 With the AF oscillator connected at pin 3 of 103 300H z 00m V is passed through 22kohm and input 3 Adjust SVR105 so that the output discrepancy between pin 7 aud pin 9 of TP 103 is t tldBaPirn 7 Pin 9 7 Tracking balance adjustment 1 Load test disc YEDS 1 and initiate play 2 Connect the millivolt meter to pin 1 of TP 102 3 Shor TP 103 pins 1 2 and 6 4 Adjust 5 101 so that the indication of miilivolt meter becomes less than 25mV NOTE H operation outside the above tolerance continues step 3 servo accuracy wil be adversely affected For this reason always check the play mode and adjust while watching the time display MILLIVOLT METER Fig 5 24 V div Sps div Photo 3 AC VOLT METER AF OSC 800 Hz 20
43. us search to off Active high 8 Mechanism Operation 1 Disc Loading Operation 1 Take out the designated disc from the magazine 2 Put the selected disc on the turntable for chucking With the above steps the disc loading process is completed This operation launches a series of operations set in motion by the gear ring operation of plate side A and plate side B which are attached at the left and right of the mechanism This series of operations is driven by the DC motor When the DC motor is running plate side A operates and lever gear ring is introduced upon which plate side B also begins gear ring operation When plate side A operates in the direction shown in Figure 12 the disc is loaded When the gear ring operation is taking place on plate side A the lever mechanism of the selected disc in the maga zine moves and the selected disc is brought out of the magazine and is sent to a designated position A Operation of Figure 13 Next the disc is lowered to the turntable of the CD mechanism section and is chucked B Operation With this the loading opera tion of the disc is finished 15 DX C400 Leader Custom code and Code indicating that the key code data code remains depressed 9 985 Ins 13 5 5 11 2588 108 10 PLATE SIDE PLATE SIDE B Fig 12 DISC MAGAZINE jo 9 Fig 13 DX C400 2 Disc Eject Gperati
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