SERVICE MANUAL
Contents
1. Loading gear plate rivet assembly Fig 40 No 49829 1 21 KD SC900R 2 2 18 Removing the turn table spindle motor See Figs 41 and 42 e Prior to performing the following procedure remove the top cover connector board chassis unit and clamper assembly 1 Remove the two screws L attaching the spindle motor as sembly through the slot of the turn table on top of the body 2 Unsolder the wire on the connector board if necessary Turn table Turn table Spindle motor Fig 42 1 22 No 49829 KD SC900R 2 3 Finder Plate Design Model Name KD SC900R Factory Setting Design Name LEOPARD Design Name SAPPHIRE BLUE Design Name SILVER HAIRLINE No 49829 1 23 KD SC900R 3 1 Adjustment method E Test instruments required for adjustment OOQONOUCUO S ON Digital oscilloscope 100MHz AM Standard signal generator FM Standard signal generator Stereo modulator Electric voltmeter Digital tester Tracking offset meter Test Disc JVC CTS 1000 Extension cable for check EXTSHOO2 22P 1 R Standard measuring conditions Power supply voltage DC14 4V 10 5 to 16V 20Kohm 2 Speakers connection Line out 2 0V Vol MAX Load impedance Output Level E How to connect the extension cable f2. 3 Turn the select lock arm in the direction of the arrow to re o AY lease the two joints v n YEN AL 4 The select lock arm spring comes off the select lock arm at ey Ra the same time Joint u Fig 22 Select lock arm Select lock arm spring Link plate Fig 23 1 16 No 49829 2 2 12 Reassembling the mode sw select lock arm See Figs 24 to 26 REFERENCE Reverse the above removing procedure 1 Reattach the select lock arm spring to the top plate and set the shorter end of the select lock arm spring to the hook w on the top plate 2 Set the other longer end of the select lock arm spring to the boss x on the underside of the select lock arm and join the select lock arm to the slots joint v Turn the select lock arm as shown in the figure 3 Reattach the mode sw while setting the part t to the first peak of the link plate gear and join the joint u CAUTION When reattaching the mode sw check if the points y and Z are correctly fitted and if each part operates properly KD SC900R Select lock arm spring Select lock arm Boss x Fig 24 Joint t Point y a Point z Mode sw Select lock arm No 49829 1 17 KD SC900R 2 2 13 Removing the select arm R link plate See Figs 27 and 28 e Prior to performing the followi
3. AOUTR Rch positive analog output terminal AOUTL Lch negative analog output terminal AOUTL Lch positive analog output terminal VSS Connect to ground VDD Power supply terminal DZFR Rch data zero input detection terminal DZFL Lch data zero input detection terminal 1 28 No 49829 KD SC900R 4 2 AN80T07 IC901 Regulator e Block diagram ASO Peak Current Protection Thermal Protection Except VDD Comp output Outputs Reference Voltage ur El L DO O ILM ILM MODE2 SW5V VDD EXT ANT CD BATT DET COMP AUDIO GND 10V Ad Out SAN 8 0V 9 0V e Pin function Symbol Function SW5V Output When Mode 1 pin is M H SW output is VDD 0 7V lo 100mA min COMP Output When ACC input pin is H COMP Output is VDD 0 7V lo 100mA min ACC Input L COMP Output OFF and H COMP Output ON VDD Output 5 7V Output voltage for a microcontroller lo 100mA min NC NC pin MODE1 3 Input L M H control pin CD Output When Mode 1 pin is H CD output is 8V lo 1200mA min 1 2 3 4 9 6 7 8 EXT Output When Mode 1 pin is M H EXT output is Vcc 1 0V lo 300mA min VCC Connected to car BACKUP Power supply ANT Output When Mode 2 pin is H ANT output is Vcc 1 0V lo 300mA MODE2 L ANT Output OFF and H ANT Output ON BATT DET NPN Transistor open collector Output When
4. 4 Remove the pu shaft from the pickup unit 5 Remove the screw F attaching the feed rack to the pickup unit 2 2 8 Reattaching the pickup unit See Figs 14 to 17 1 Reattach the feed rack to the pickup unit using the screw F 2 Reattach the feed sw holder to the feed rack while setting the joint g to the slot of the feed rack and setting the part f of the feed rack to the switch of the feed sw holder correct ly 3 As the feed sw holder is temporarily attached to the pickup unit set to the gear of the joint g and to the bending part of the chassis joint h at a time CAUTION Make sure that the part i on the underside of the feed rack is certainly inserted to the slot j of the change lock lever 4 Reattach the feed sw holder using the screw E 5 Reattach the pu shaft to the pickup unit Reattach the pu shaft holder to the pu shaft using the screw D Feed sw holder Joint T Pu shaft Joint i oint g o1 ON D s Parte Pu shaft holder Pickup unit Fig 14 1 14 No 49829 Pickup unit HL L T gt Part e Dili Feed sw holder Fig 15 Pu shaft Part Pickup unit YO a Joint Pu shaft 9 holder Feed sw holder Pickup unit Joint f daala Feed sw holder Fig 18 KD SC900R 2 2 9 Removing the trigger arm See Figs 19 and 20 e P
5. Chassis rivet assembly Fig 11 2 2 6 Removing the loading feed motor assembly See Figs 12 and 13 Prior to performing the following procedure remove the top cover connector board and chassis unit 1 Remove the screw C and move the loading feed motor assembly in the direction of the arrow to remove it from the chassis rivet assembly 2 Disconnect the wire from the loading feed motor assembly if necessary CAUTION When reassembling connect the wire from the loading feed motor assembly to the flame as shown in Fig 12 KD SC900R mo S d ANDA a N E O 9 p oa S i AS E PN A DI Loading feed motor assembly Fig 12 Loading feed motor assembly jM a yA No 49829 1 13 KD SC900R 2 2 7 Removing the pickup unit See Figs 14 to 18 e Prior to performing the following procedure remove the top cover connector board and chassis unit 1 Remove the screw D and pull out the pu shaft holder from the pu shaft 2 Remove the screw E attaching the feed sw holder 3 Move the part e of the pickup unit upward with the pu shaft and the feed sw holder then release the joint f of the feed sw holder in the direction of the arrow The joint g of the pickup unit and the feed rack is released and the feed sw holder comes off
6. L TAE i LAN DET switch wire a LE 5 FAN SEN NIE S Tab c Feed sw holder Fig 7 KD SC900R 2 2 4 Removing the chassis unit See Figs 8 and 9 e Prior to performing the following procedure remove the top cover and connector board ke iat Suspension spring L 1 Remove the two suspension springs L and R attaching Suspension spring R the chassis unit to the frame y T CAUTION The shape of the suspension spring L and R are dif ferent Handle them with care When reassembling make sure that the three shafts on the underside of the chassis unit are inserted to the dampers certainly Suspension spring R Fig 8 Suspension spring L Chassis unit No 49829 1 11 KD SC900R 2 2 5 Removing the clamper assembly See Figs 10 and 11 e Prior to performing the following procedure remove the top cover 1 Remove the clamper arm spring 2 Move the clamper assembly in the direction of the arrow to release the two joints d 1 12 No 49829 Clamper arm e spring IPN Mi VEN SE atf o C assis rive Jonia lt assembly Clamper assembly Joint d Fig 10 Clamper arm spring Clamper Jointd assembly
7. No 49829 1 43 4 16 TC94A20F 011 IC401 CD ROM decoder MP3 decoder with DAC and SRAM e Pin layout Block diagram KD SC900R 3 1 olpny 3 1 WOSOJOUN Jopooep jiu y puno ju 8 PUNO uUONDoNJISU ke i O 4 O pd 03 c o O PJOM XG O1 U09 op 6 Lt od ureJ604g 4 WOHd Ki PA N ZA LA OA A cX EX OX ki 1o 18169 8 J l Ee Z INVES l mz Al A NON L SI 19151694 19 5169 19151694 E 19 UI0X D J9 UlOd A J9 utoq x N E pJOM xp pJOM NZ INVH X O N E ap 4 WvHS l EJ 9 9 sseJppy S E Fa El 5 El kal E uod Pipino d l da indino eJauar i 1dnuuelu WV be 1 44 No 49829 e Pin functions Pin No Symbol I O Functions 1 RESET Hard reset input H normal L reset 2 MiMD Micon I F mode select input 3 MiCS Micon I F chip select input 4 MiLP Micon I F latch palus input 5 MiDio I O Micon I F data input output 6 MiCK Micon I F clock input 7 MiACK O Micon I F acknowledge output 8 VDDT Power supply for digital 3 3V 9 SDo O Data output 10 BCKo O Bit output 11 LRCKo O ILR clock output 12 SDIO Data input O 13 BCKIA Bit clock input A 14 LRCKiA ER clock input A 15 SDIL Data input terminal 1 16 BCKIB Bit clock input terminal B 17 LR
8. 6 and 7 YES YES Check the vicinity of appear at RF test point ird the spindle motor IC501 Check ICRA and V S and its wiring I NO Check the circuits in the NO vicinity of IC501 19 24 or the pickup Is the RF waveform at RF test point distorted YES Proceed to the Tracking section 3 2 4 Tracking section When the disc is rotated at first YES Check the circuit in the Check the pickup and vicinity of IC501 pins its connections VWA Approx 1 2V tas Is the tracking error signal output at IC501 11 Check IC541 1 26 No 49829 3 3 Maintenance of laser pickup 1 Cleaning the pick up lens Before you replace the pick up please try to clean the lens with a alcohol soaked cotton swab 2 Life of the laser diode When the life of the laser diode has expired the following symptoms will appear e The level of RF output EFM output ampli tude of eye pattern will be low Is RF output 1 0 0 35Vp p Replace it 3 Semi fixed resistor on the APC PC board The semi fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power Since this adjustment should be performed to match the characteristics of the whole optical block do not touch the semi fixed resistor If the laser power is lower than the specified value the laser diode is almost worn out and the laser pickup should be re placed If the semi f
9. pickup No observance of this in struction may cause damage of the pickup 1 Remove the screw B fixing the connector board 2 Solder the short circuit point on the connector board 3 Disconnect the flexible wire from the pickup 4 Move the connector board in the direction of the arrow to release the two joints b 5 Unsolder the wire on the connector board if necessary CAUTION Unsolder the short circuit point after reassembling KD SC900R B Connector board 7 Y Z Joints b Short circuit point Pickup Fig 3 Short circuit point Soldering Flexible wire Pickup Fig 4 Connector board No 49829 1 9 KD SC900R 2 2 3 Removing the DET switch See Figs 6 and 7 1 Extend the two tabs c of the feed sw holder and pull out the switch 2 Unsolder the DET switch wire if necessary 1 10 No 49829 qx TT Xx L 2 A T gt 7 45 TRA Z2r DET switch 2 PROV pwe Ab ns nH n nnn nn No SO CURE Jl Ou R e TAN eT 7 my 3 e 9 f 9 mI Connector NAL o board E S LO T 7 OOO Pickup Fig 6 DET switch Tab c iS fL
10. pin Playback frame sync signal output pin Subcode block sync signal output pin H level at S1 when subcode sync is detected ooo OO OO O O O General purpose input output pins Input port at reset PLL only 3 3V power supply voltage pin EFM and PLCK phase difference signal output pin 1 42 No 49829 Pin KD SC900R No Symbol I O Descroption 17 TMAX O TMAX detection result output pin Shorter than fixed period AVSS3 18 LPFN Inverted input pin for PLL LPF amp 19 LPFO O Output pin for PLL LPF amp 20 PVREF PLL only VREF pin 21 VCOF O VCO filter pin 22 AVss3 Analog GND pin 23 SLCO O DAC output pin for data slice level generation 24 RFI RF signal input pin Zin selectable by command 25 AVpp3 Analog 3 3V power supply voltage pin 26 RFCT RFRP signal center level input pin 27 HFZI RFRP signal zero cross input pin 28 RFRP RF ripple signal input pin 29 FEI Focus error signal input pin 30 SBAD Sub beam adder signal input pin 31 TEI Tracking error input pin Inputs when tracking servo is on 32 TEZI Tracking error signal zero cross input pin 33 FOO O Focus equalizer output pin 34 TRO O Tracking equalizer output pin 35 VREF Analog refe
11. CD CK 43 LCDCE O LCD CE 44 NC O Not use 45 EPROMDI l2C data input 1 46 No 49829 KD SC900R Pin No Symbol I O Function 46 EPROMDO O I2C data output 47 EPROMCK O I2C clock output 48 OPEN DOOR OPEN SW 49 CSN O External DAC IC chip select output 50 CCLK O External DAC IC control data output 51 CDTI O External DAC IC control data output 52 PDN O Power down mode output o3 SD ST Station detector or stereo indicator input H means a station is there L means the program is stereo 54 MP3CLK O MP3 IC clock output 55 MONO O Mono by power force 56 MP3DIN MP3 IC data input 57 MP3DOUT O MP3 IC data output 58 MP3STBY O MP3 IC standby output 59 MP3RESET O MP3 IC reset output 60 MP3REQ MP3 IC REQ input 61 DETACH Detach signal input 62 AFCK AF check input 63 SEEK STOP O Switching SEEK STOP 64 IFC CONT O IF control 65 FM AM O FM AM band selecting output H FM L AM 66 PLLCE O CE output for PLL IC 67 PLLDA O Data output for PLL IC 68 PLLCK O Clock output for PLL IC 69 PLLDI Data input from PLL IC 70 TELMUTE Telephone muting detection input Active level can be selected H or L in PSM 71 NC Not use 72 VSS Ground 73 DIMIN Dimmer detector input L dimmer on 74 PS1 Power save 1 L ACC off 75 POWER O Power on off control outp
12. CH1 input AMP inverted input 2 VIN1 A CH1 input AMP_non inverted input 3 VCCP1 CH1 and CH2 power stage power supply 4 VO1 Output pin for channel 1 5 VO1 CH1 output pin for channel 1 6 VO2 Output pin for channel 2 7 VO2 Output pin for channel 2 8 VO3 Output pin for channel 3 9 VO3 Output pin for channel 3 10 VO4 Output pin for channel 4 11 VO4 Output pin for channel 4 12 VCCP2 CH3 and CH4 power stage powr supply 13 VIN4 Input pin for channel 4 14 VIN4G Input pin for channel 4 for gain adjustment 15 VIN3 Input pin for channel 3 16 VIN3G Input pin for channel 3 for gain adjustment 17 VIN2 Input pin for channel 2 18 VIN2G Input pin for channel 2 for gain adjustment 19 REGIN External PNP transistor base connection 20 3 3VREG 3 3VREG output pin external PNP transistor collector connection 21 VCCS Signal system GND 22 VREFIN Reference voltage application pin 23 MUTE Output ON OFF pin 24 VIN1 SW CH1 input OP AMP changeover pin 25 o GND Signal system GND 26 VIN1 B CH1 AMP_B non inverted input pin 27 VIN1 B CH1 AMP_B inverted input pin 28 VIN1 CH1 input pin input OP AMP output pin No 49829 1 35 KD SC900R 4 8 NJM4565M WE IC581 CD L P F A OUTPUT 8 v A INPUT B OUTPUT A INPUT 6 B INPUT B INPUT 4 9 NJU7241F25 X IC461 Regulator e Pin layout GND 1 5 SIB VIN 2 VOUT 3 4 NC Block diagram LA GND 1 36 No 49829 KD SC900R 4 10 NJU7241F33 X IC471 Voltage regulator
13. CKIB ILR clock input terminal B 18 VDD Power supply for digital 2 5V 19 STANBY Standby mode control input H STBY L normal 20 VSS GND for digital 21 VSSL GND for DAC Lch 22 VRAL Reference voltage for DAC Lch 23 LO O DAC Lch output 24 25 VDAL VDAR Power supply for DAC Lch Power supply for DAC Rch 2 5V 26 RO O DAC Rch output 27 VRAR Reference voltage for DAC Rch 28 VSSR GND for DAC R ch 29 TESTP Testterminal H test mode L normal 30 TXO O SPDIF output 31 34 Po0 Po3 O General purpose output 0 3 35 VDDT Power supply for digital 3 3V 36 38 Po4 Po6 O General purpose output 4 6 39 REQ O REC terminal 40 VSS GND for digital 41 IRO I O External interrupt input 42 VDDM Internal 1Mbit SRAM power supply 2 5V 43 44 FiO Fi1 Flug input 0 1 45 VSSM GND for internal 1Mbit SRAM 46 47 Pi0 Pi1 General ourpose input 01 48 VSS GND for digital 49 50 Pi2 Pi3 General purpose input 23 51 Pi4 CLCL General purpose input 4 SUBQ I F clock inputoutput 52 VDD Power supply for digital 2 5V 53 Pi5 DATA General purpose input 5 SUBQ I F data input 54 TSTIN SFSY Test terminal SUBQ I F flame sync input 55 Fi2 SBSY Flug input 2 SUBQ I F block sync input 56 VSSP GND for VCO 57 Pdo O PLL phase error detection signal output 58 Vcol VCO control voltage input 59 VDDP Power supply for VCO 2 5V 60 CKo CKi I O External clock input Clock output terminal 61 VDDX Power supply for X tal oscil
14. KD SC900R SERVICE MANUAL CD RECEIVER KD SC900R COMPACT DIGITAL AUDIO NMP lt B Area Suffix R D S PLAYBACK Continental Europe Central Europe TABLE OF CONTENTS 1 Important Safety Precautions 1 22999 9 ESU avi ai mn kool ke ia akt a ths e ER Gee A e ke kk a ur kt 1 2 2 WISASSEMDIY MEINOG ss ew aka kaa a eee AA 1 4 3 FAQJUSUMO 11 ke isit a a fa fif a tn et rad e a n see eer e a n ai e S e aca ana 1 24 4 Description Of Major CS ie ss oto tees oes cae ors ana AAA 1 28 COPYRIGHT O 2003 VICTOR COMPANY OF JAPAN LTD No 49829 2003 04 KD SC900R SECTION 1 Important Safety Precautions 1 1 Safety Precautions A CAUTION Burrs formed during molding may be left over on some parts of the chassis Therefore pay attention to such burrs in the case of preforming repair of this system N CAUTION Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check 1 2 No 49829 KD SC900R 1 2 Preventing static electricity Electrostatic discharge ESD which occurs when static electricity stored in the body fabric etc is discharged can destroy the laser diode in the traverse unit optical pickup Take care to prevent this when performing repairs 1 2 1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup laser diode in devices such as DVD players Be careful to use proper
15. NI Main beam amp input pin 3 FPI Main beam amp input pin 4 TPI Sub beam amp input pin 5 TNI Sub beam amp input pin 6 MDI Monitor photo diode amp input pin 7 LDO O Laser diode amp output pin 8 SEL APC circuit ON OFF control signal laser diode LDO control signal input or bottom peak detection frequency change pin APC GND OFF Connected VCC through 1k resistor Control signal output Control signal output 9 TEB Tracking error balance adjustment signal input pin Adjusts TE signal balance by eliminating carrier component from PWM signal 3 state output PWM carrier 88 2kHz output from TC94A14F FA TEBC pin using RC LPF and inputting DC TEBC input voltage GND VCC 10 TEN Tracking error signal generation amp negative phase input pin 11 TEO O Tracking error signal generation amp output pin Combining TEO signal RFRP signal with TC94A14F FA configures tracking search system 12 RFDC O RF signal peak detection output pin 13 GVSW AGC FE TE amp gain change pin GVSW Mode 14 VRO O Reference voltage VRO output pin VRO 1 2VCC When VCC 3 3V 19 FEO O Focus error signal generation amp output pin 16 FEN Focus error signal generation amp negative phase input pin 17 RFRP O Signal amp output pin for track count Combining RFRP signal and TEO signal with TC94A14F FA configures tracking search system 18 REIS 19 RFGO O IRF signal amplitude adjustment amp output pin 20 RFGC IRF amplitude adjustment control signal inpu
16. PIN FUNCTION 1 GND 2 VIN 3 VOUT 4 NC 5 STB 4 11 RPM6938 SV4 IC602 Remote control receiver e Pin diagram e Block diagram O Vcc O Rout Detector fo trimming circuit O GND No 49829 1 37 KD SC900R 4 12 SAA6579T X IC71 RDS detecter e Pin layout e Block diagram FILTER 8th ORDER DIVIDER GENERATOR kaa ANTI 57 kHz ALIASING BAND PASS RECONSTRUCTION mca QUALITY BIT FILTER BIPHASE KAER VARIABLE AND SYMBOL DIFFERENTIAL 2 FIXED DIVIDER DECODER ki 5 VP1 y REFERENCE SES N TEST LOGIC AND OUTPUT VOLTAGE MEN SELECTOR SWITCH A RENE Description e Pin function Quality indication output RDS data output Reference voltage output 0 5VDDA Multiolex signal input 5V supply voltage for analog part Ground for analog part OV Sub carrier input to comparator CO N 0 o1 B amp B WwW DM gt Sub carrier output of reconstruction filter Oscillator mode test control input Test enable input Ground for digital part OV 5V supply voltage for digital part Oscillator input Oscillator output 57 kHz clock signal output RDS clock output 1 38 No 49829 KD SC900R 4 13 TB2118F X IC31 PLL e Terminal Layout TNNMTWONQMOQe2Irt Block diagram Constant power supply voltage AM CP switch FM V 5 bi Es e Y leua S AMVCO 18 12 bit Programmable counter ai Re
17. a C 7 AT Joint b Joint a Fig 29 Link plate Point f Fig 30 Point e 2 2 15 Removing the loading roller assembly See Figs 31 to 33 Prior to performing the following procedure remove the clamper assembly and top plate assembly 1 Push inward the loading roller assembly on the gear side and detach it upward from the slot of the joint g of the lock arm rivet assembly 2 Detach the loading roller assembly from the slot of the joint h of the lock arm rivet assembly The roller guide comes off the gear section of the loading roller assembly Remove the roller guide and the HL washer from the shaft of the loading roller assembly 3 Remove the screw J attaching the lock arm rivet assembly 4 Push the shaft at the joint i of the lock arm rivet assembly inward to release the lock arm rivet assembly from the slot of the L side plate 5 Extend the lock arm rivet assembly outward and release the joint j from the boss of the chassis rivet assembly The roller guide springs on both sides come off at the same time CAUTION When reassembling reattach the left and right roller guide springs to the lock arm rivet assembly before reat taching the lock arm rivet assembly to the chassis rivet assembly Make sure to fit the part k of the roller guide spring inside of the roller guide Refer to Fig 34 Roller guide J HL washer Loading roller assembly Roller guide Loading roller as
18. battery is lower then 9V L Audio Output When Mode 1 pin is M H Audio output is 9V lo 500mA min ILM AJ ILM Illumination Output adjustable pin ILM Illumination Output When Mode 1 pin is M H ILM output is 10V lo 300mA min GND Connected to the IC substrate No 49829 1 29 KD SC900R 4 3 BR24C16F X IC771 EEPROM e Pin layout VCC WP SCL SDA AO A1 A2 GND e Block diagram Address decoder e Pin function Symbol I O Function VCC Power supply GND GND AO A1 A2 No use connect to GND SCL Serial clock input SDA I O Serial data I O of slave and ward address WP Write protect terminal Slave Ward Address resister TON Data resister 1 30 No 49829 KD SC900R 4 5 LC75823W IC601 LCD driver e Pin Layout S1 o S2 o S3 O S4 o S5 o S6 o S70 58 0 S90 S10 o S11 o 12 O S130 S14 o S150 S16 o 1 2 3 4 5 6 T 8 e Pin function Pin No Symbol Functions 1 to 52 S1 to 52 Segment output pins used to display data transferred by serial data input 53 to 55 COM to COM3 Common driver output pins The frame frequency is given by t0 fosc 384 Hz 56 VDD Power supply connection Provide a voltage of between 4 5 and 6 0V 57 INH Display turning off input pin INT L Vss off S1 to S52 COM1 to COM3 L INT H VDD Serial data can be transferred in display
19. cking loop closed HF signal eye pattern TOC read out Jump to the first track KD SC900R e When the laser diode correctly emits 84 Microprocessor commands SEL TC94A14FA 38 4V LD po CN501 15 No disc display e When the disc correctly rotates Microprocessor commands 84 DMO Wi TC94A14FA 41 i t t 4 Spindle i 86 motor 12501 7 Rough Acceleration Servo Servo CLV l 9 OY 0 5 Sec 0 5 Sec t Tracking Servo Loop ON e RF signal Rough Servo Mode CLV Servo Mode Program Area CLV Servo Mode Lead In Area Digital 0 No 49829 1 25 KD SC900R 3 2 1 Feed section Is the voltage output at IC541 pin 40 5V or OV YES Is the wiring for IC501 Is 3 3V present at ICS01 pin 27 pin 20 NO YES Check the vicinity of IC541 Is 6V or 2V present at Check the feed motor IC501 4 and 5 connection wiring Check CD 8V and 5V YES Is 4V present at both sides of the feed motor YES NO Check the feed motor Check IC501 3 2 2 Focus section When the lens is Check the circuits in moving the vicinity of IC501 pins 8 9and 1 5 YES Check the pickup and its connections Is 4V present at IC541 pins 41 Does the S search waveform appear at IC501 pins 8 and 9 3 2 3 Spindle section Is the disk rotated YES Is 4V present at 1C501 pins
20. emoving the main board See Fig 9 e Prior to performing the following procedure remove the front Mainboard panel assembly front chassis assembly heat sink bottom cover and rear bracket 1 Remove the two screws H attaching the main board 2 Disconnect connector CN501 and remove the main board 2 1 7 Removing the CD mechanism assembly See Fig 10 e Prior to performing the following procedure remove the front panel assembly front chassis assembly heat sink bottom J cover rear bracket and main board 1 Remove the three screws J oo0000000000 00000000000 CD mechanism assembly Top chassis Fig 10 1 6 No 49829 2 1 8 Removing the front board See Figs 11 to 13 Prior to performing the following procedure remove the front panel assembly 1 Remove the four screws K on the back side of the front panel assembly 2 Release the ten joints g 3 Take out the front board KD SC900R Fig 11 Joint g Front board Fig 13 No 49829 1 7 KD SC900R 2 2 CD Mechanism Assembly 2 2 1 Removing the top cover See Figs 1 and 2 1 Remove the two screws A on the both side of the body 2 Lift the front side of the top cover and move the top cover backward to release the two joints a 1 8 No 49829 Fig 2 Top cover 2 2 2 Removing the connector board See Figs 3 to 5 CAUTION Before disconnecting the flexible wire from the pickup solder the short circuit point on the
21. grounding in the area where repairs are being performed 1 Ground the workbench Ground the workbench by laying conductive material such as a conductive sheet or an iron plate over it before placing the traverse unit optical pickup on it 2 Ground yourself Use an anti static wrist strap to release any static electricity built up in your body caption Anti static wrist strap 1MQ l onductive material conductive sheet or iron plate 3 Handling the optical pickup e In order to maintain quality during transport and before installation both sides of the laser diode on the replacement optical pickup are shorted After replacement return the shorted parts to their original condition Refer to the text Do not use a tester to check the condition of the laser diode in the optical pickup The tester s internal power source can easily destroy the laser diode 1 3 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Cut off the shorted part of the flexible cable using nippers etc after replacing the optical pickup For specific details refer to the replacement procedure in the text Remove the anti static pin when replacing the traverse unit Be careful not to take too long a time when attaching it to the connector 3 Handle the flexible cable carefully as it may break when subjected to strong force 4 I t is not pos
22. ixed resistor is adjusted while the pickup is functioning normally the laser pickup may be damaged due to excessive current KD SC900R 3 4 Replacement of laser pickup Turn off the power switch and disconnect the power cord from the ac outlet Replace the pickup with a normal one Refer to Pickup Removal on the previous page Plug the power cord in and turn the power on At this time check that the laser emits for about 3seconds and the objective lens moves up and down Note Do not observe the laser beam directly Play a disc Check the eye pattern at RF test point No 49829 1 27 KD SC900R SECTION 4 Description of major ICs 4 1 AK4381VT X IC481 D A converter e Pin layout MCLK 1 DZFL BICK 2 DZFR SDTI 3 VDD LRCK 4 VSS PDN 5 AOUTL CSN 6 AOUTL CCLK 7 AOUTR CDTI 8 AOUTR e Block diagram MCLK VDD De emphasis Clock Q VSS Control Divider O DZFL CO DZFR 8X A AOUT L Audio Interpolator Modulator Mi AOUTL Data Interface 8X AY AOUTR Interpolator Modulator AOUTR PDN e Pin functions Symbol Description MCLK Master clock input terminal BICK Audio serial data clock terminal SDTI Audio serial data input terminal LRCK L R Clock terminal PDN Power down mode terminal CSN Chip select CCLK Control data input terminal CO N OI O1 Cc n gt CDTI Control data input terminal AOUTR Rch negative analog output terminal
23. lator 2 5V 62 63 Xi XO LO Oscillator connection terminal for input output 64 VSSX GND for oscillator KD SC900R No 49829 1 45 KD SC900R 4 17 UPD784217AGC195 1C701 CPU e Pin Layout Block Diagram Pin No Symbol I O Function 1 CDRESET Not use 2 CDMUTE Not use 3 SW2 O CD mecha SW2 4 PSW O CD mecha position setting SW 5 LMO O Loading motor control output O 6 LM1 O Loading motor control output 1 7 NC Not use 8 ANTCRTL O Antenna remote control 9 VDD Power supply 10 X2 11 X1 12 VSS Ground 13 XT2 14 XT1 15 RESET System reset 16 SW1 CD mecha SW1 17 BUSINT Notuse 18 PS2 Power save2 H means STOP mode 19 STEERING Not use 20 RDSSCK RDS clock input 21 RDSDA RDS data input 22 REMOCON Remocon data input 23 AVDD A D converter power supply 24 AVREFO A D reference voltage 25 VOL1 Volume encoder pulse input 1 26 VOL2 Volume encoder pulse input 2 27 KEYO Key input O 28 KEY1 Key input 1 29 KEY2 Key input 2 30 LEVEL Level meter input 31 SQ Signal Iquality input 32 SM Signal level meter input 33 AVSS Ground 34 35 NC Not use 36 AVREF Analog reference voltage 97 BUSSI l Not use 38 BUSSO O Not use 39 BUSSCK I O Not use 40 BUSI O O Not use 41 LCDDA O LCD DATA output 42 LCDCK O L
24. ng plate assembly 4 Pull out the loading gear 2 and remove the change lock le ver 5 Remove the E ring and washer attaching the changer gear 2 6 The changer gear 2 change gear spring and adjusting washer come off 7 Remove the loading gear 1 8 Move the change plate rivet assembly in the direction of the arrow to release from the three shafts of the chassis rivet assembly upward See Fig 38 9 Detach the loading gear plate rivet assembly from the shaft of the chassis rivet assembly upward while releasing the joint p See Figs 38 and 40 10 Pull out the loading gear 4 KD SC900R Change plate E rivet assembly T AN ler j Loading gear 4 ko de y q Loading gear plate S K rivet assembly x i SAN Shaft K on Loading gear 2 BES L SAND Ko cs U Loading gear 1 EAN Chassis rivet assembly E ring Change gear 2 Fig 38 Loading plate assembly oe Chassis rivet assembly Fig 39 E ring Washer No Loading gear 1 Change gear 245 Loading gear 2 Change gear spring amp go m Change lock lever Adjusting washer 4 fl Loading gear 4 Change plate rivet assembly
25. ng procedure remove the top plate assembly 1 Bring up the select arm R to release from the link plate joint a and turn as shown in the figure to release the two joints b and joint c 2 Move the link plate in the direction of the arrow to release the joint d Remove the link plate spring at the same time REFERENCE Before removing the link plate remove the mode sw 2 2 14 Reattaching the Select arm R link plate See Figs 29 and 30 REFERENCE Reverse the above removing procedure 1 Reattach the link plate spring 2 Reattach the link plate to the link plate spring while joining them at joint d 3 Reattach the joint a of the select arm R to the first peak of the link plate while joining the two joints b with the slots Then turn the select arm R as shown in the figure The top plate is joined to the joint c CAUTION When reattaching the select arm R check if the points e and f are correctly fitted and if each part operates prop erly 1 18 No 49829 Joint c Link plate Joint r Select arm R Joint b Joint a Fig 27 Link plate spring Link plate Fig 28 Link plate spring SelectarmR Joint c Joint d NC NM A O ii TUO o o a y
26. off mode Used for applying the LCD drive 2 3 bias voltage externally Must be connected to VDD2 when a 1 2 bias drive scheme is used Used for applying the LCD drive 1 3 bias voltage externally Must be connected to VDD1 when a 1 2 bias drive scheme is used Power supply connection Connect to GND Oscillator connection An oscillator circuit is formed by connecting an external resistor and capacitor at this pin Serial data interface connection to the controller CE Chip enable Serial data interface connection to the controller CL Sync clock Serial data interface connection to the controller DI Transfer data No 49829 1 31 KD SC900R 4 6 LA4743K 1C301 Power amp Block diagram 2200uF ZZZ 0224F Vee 1 2 Vcc 3 4 d Ue da 9 OUT 1 l OUT 1 T Kr O PWR GND1 IN2 gs OUT 2 F 3 0 22 UF 2 PWR GND2 ST BY Stand by ST ON Ripple Mute 10 ae gt 10 Filt 22 PO Iter 4TuF ZL 777 pi 3 3uF or MN Tn 0 22 uF a 19 OUT 3 E w G PWR GND3 Protective 18 circuit PRE GND 217 da an OUT 4 No 14 gt to 23 0 22 uF Muting amp PWR GND4 ON TIME C 16 ON Time Control 24 22uF Circuit TIT 1 32 No 49829 e Pin layout e Pin function Function Symbol KD SC900R Function Header of IC FLIN Front Lch input Power GND RLIN Rear Lch input Outpur for front Rch ONTIME Power on time con
27. or adjusting The cardboard is cut in a suitable size uses for the insulation stand of mechanism Caution Be sure to attach the heat sink and rear bracket onto the power amplifier 1C301 and regulator IC901 respectively before supply the power If voltage is applied without attaching these parts the power amplifier IC and regulator IC will be destroyed by heat Heat sink 1 24 No 49829 SECTION 3 Adjustment B Standard volume position Balance and Bass 8 Treble volume Indication O Loudness OFF Frequency Band FM 87 5 MHz to 108 0 MHz AM MW 522 kHz to 1620 kHz LW 144 kHz to 279 kHz Dummy load Exclusive dummy load should be used for AM and FM For FM dummy load there is a loss of 6dB between SSG output and antenna input The loss of 6dB need not be considered since direct reading of figures are applied in this working standard Extension cable EXTSHOO2 22P AM bracket bie LE x 3 2 Flow of functional operation unit TOC read e When the pickup correctly moves to the inner area of the disc Microprocessor 83 82 81 commands FMO TC94A14FA 40 FEED MOTOR TERMINAL A L IC501 4 3 3V Hi Z OFF REST SW ON e When correctly focused FEO A TA2157 15 2 2V Focus Servo Loop ON Power ON Set Function CD Pickup feed to the inner area YES Laser emitted Rem YES HF signal eye pattern remains closed opens Tra
28. rence power supply voltage pin 36 RFGC O HF amplitude adjustment control signal output pin 37 TEBC O Tracking balance control signal output pin 38 SEL O APC circuit ON OFF signal output pin At laser on high impedance with UHS L H output with UHS H 39 AVpp3 Analog 3 3V power supply voltage pin 40 FMO O Feed equalizer output pin 41 DMO O Disc equalizer output pin 42 Vss3 Digital GND pin 43 Vpp3 Digital 3 3V power supply voltage pin 44 TESIN Test input pin Normally fixed to L 45 XVss3 System clock oscillator GND pin 46 XI System clock oscillator input pin 47 XO O System clock oscillator output pin 48 XVpp3 System clock oscillator 3 3V power supply voltage pin 49 DVss3R DA converter GND pin 50 HO O R channel data forward output pin 51 DVpps DA converter 3 3V power supply pin 52 DVR Reference voltage pin 53 LO O L channel data forward output pin 54 DVss3L DA converter GND pin 55 ZDET O 1 bit DA converter zero detection flag output pin 56 Vss5 Microcontroller interface GND pin 57 BUSO 58 BUST 59 BUS2 1 0 Microcontroller interface data I O pins 60 BUS3 61 BUCK Microcontroller interface clock input pin 62 CCE Microcontroller interface chip enable signal input pin At L BUSO to BUS3 are active 63 RST Reset signal input pin At reset L 64 Vpp5 Microcontroller interface 5V power supply pin
29. rior to performing the following procedure remove the top cover connector board and clamper unit 1 Turn the trigger arm in the direction of the arrow to release the joint k and pull out upward Trigger arm CAUTION When reassembling insert the part m and n of the trigger arm into the part p and q at the slot of the chassis rivet assembly respectively and join the joint k at a time Chassis rivet assembly Fig 19 Trigger arm 2 2 10 Removing the top plate assembly See Fig 21 Prior to performing the following procedure remove the top i Top plate assembly cover connector board chassis unit and clamper assembly 1 Remove the screw H 2 Move the top plate assembly in the direction of the arrow to f release the two joints r a Ej of r 3 Unsolder the wire marked s if necessary 1 SIJE x Y e 1 H a Sy y gt Joints r 9 Au tf e SZ Li AN No 49829 1 15 KD SC900R 2 2 11 Removing the mode sw select lock arm See Figs 22 and 23 e Prior to performing the following procedure remove the top plate assembly 1 Bring up the mode sw to release from the link plate joint t and turn in the direction of the arrow to release the joint u 2 Unsolder the wire of the mode sw marked s if necessary Link plate Joint t Mode sw Select lock arm
30. rom an external equalizer Bass control capacitor left channel or output to an external equalizer Bass control capacitor left channel Input volume 1 left control part Input loudness left control part Output source selector left channel Not used Not used Input C left source Not used Input B left source 1 48 No 49829 Input A left source No Symbol I O Functions 17 IAR Input A right source 18 IBR Input B right source 19 CAP Electronic filtering for supply 20 ICR Input C right source 21 Vref Reference voltage 0 5Vcc 22 IDR Not used 23 QSR O Output source selector right channel 24 ILR Input loudness right channel 25 IVR Input volume 1 right control part 26 BiR Bass control capacitor right channel 27 B2R O Bass control capacitor right channel or output to an external equalizer 28 TR Treble control capacitor right channel or input from an external equalizer 29 OUTRF O Output right front 30 OUTRR O Output right rear 31 Vcc Supply voltage 32 SCL Serial clock input KD SC900R No 49829 1 49 KD SC900R JVC VICTOR COMPANY OF JAPAN LIMITED AV 8 MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan No 49829 Ve Printed in Japan 200304WPC
31. sembly Roller guide spring Lock arm rivet assembly Fig 31 Roller guide KD SC900R Loading roller assembly Boss Hl Roller shaft assembly Loading roller Lock arm rivet assembly Roller guide spring Fig 34 No 49829 1 19 KD SC900R 2 2 16 Removing the loading gear 5 6 and 7 See Figs 35 and 36 e Prior to performing the following procedure remove the top cover chassis unit pickup unit and top plate assembly 1 Remove the screw K attaching the loading gear bracket The loading gear 6 and 7 come off the loading gear brack et 2 Pull out the loading gear 5 1 20 No 49829 K Loading gear bracket Li i SI p Loading gear 6 hl wa Loading gear 5 Loading gear 3 K Loading gear 6 N Loading gear 7 AS d So A A KIN Loading gear 5 4 SS Loading gear bracket Fig 36 2 2 17 Removing the gears See Figs 37 to 40 Prior to performing the following procedure remove the top cover chassis unit top plate assembly and pickup unit Pull out the loading gear 3 See Fig 35 1 Pull out the feed gear 2 Move the loading plate assembly in the direction of the ar row to release the L side plate from the two slots m of the chassis rivet assembly See Fig 37 3 Detach the loading plate assembly upward from the chas sis rivet assembly while releasing the joint n Remove the slide hook and loading plate spring from the loadi
32. sible to adjust the semi fixed resistor that adjusts the laser power Do not turn it 1 4 Attention when traverse unit is decomposed Please refer to Disassembly method in the text for the CD pickup unit e Apply solder to the short land before the flexible wire is disconnected from the connector on the CD pickup unit If the flexible wire is disconnected without applying solder the CDpickup may be destroyed by static electricity e In the assembly be sure to remove solder from the short land after connecting the flexible wire Short circuit point 8 d T 8 Soldering 2 E e Flexible wire AA A Short circuit point Pickup No 49829 1 3 KD SC900R SECTION 2 Disassembly method 2 1 Main body 2 1 1 Removing the front panel assembly See Fig 1 1 Push the detach button in the lower left part of the front panel assembly and remove the front panel assembly in the direction of the arrow 2 1 2 Removing the front chassis assembly See Figs 2 to 4 Prior to performing the following procedure remove the front panel assembly 1 Remove the screw A on the both sides of the main body 2 Remove the two screws B on the front side of the main body 3 Release the two joints a and two joints b on both sides of the main body using a screwdriver and remove
33. sistor 2 E ae AObit shift register IFC 13 20 bit BINARY COUNTER M DIN CK D A FM cp lO PORT itch Y 8 Q 09 02 12 4 07 1 63 SL I O 1 O 2 out 1out 2 vdd2 vdd d gnd vcc a gnd e Pin Function Function Function Crystal oscillator pin IF signal input Non connect Power pins for digital block Chip enable input FM band local signal input Serial data input AM band local signal input Clock input Connect to GND for digital circuit Serial data output Charge pump output for FM Register control pin Tuning voltage biased to 2 5V I O ports Charge pump output for AM I O ports Power pins for analog block Non connect Ripple filter connecting pin Non connect Connect to GND for analog circuit Single power supply for REF frequency block Crystal oscillator pin No 49829 1 39 KD SC900R 4 14 TA2157FN X IC521 RF amp e Terminal layout 24 ai 13 1 fe 12 Block diagram pet Eo y BOTIO PEAK 40k Q SEL VCTRLPIN APC SW RFGC AGC Gian TEB TE BAL VCC APC ON 12dB Normal mode OdB HiZ APC ON 6dB Normal mode OdB APC OFF SIND LDO H 1 40 No 49829 0dB CD RW mode 12dB e Pin function KD SC900R Pin No Symbol I O Function 1 VCC 3 3V power supply pin 2 F
34. t pin Adjusts RF signal amplitude by eliminating carrier component from PWM signal 3 state output PWM carrier 88 2kHz output fromTC94A14F 14FA RFGC pin using RC LPF and inputting DC RFGC input voltage GND VCC 21 AGCIN RF signal amplitude adjustment amp input pin 22 RFO O RF signal generation amp output pin 23 RFI RF signal generation amp input pin 24 GND GND pin No 49829 1 41 KD SC900R 4 15 TC94A14FA IC541 DSP 8 DAC e Terminal layout 8 block daiagram 9 0 9 0 0960596 Clock generator automatic adjustment circuit Synchronous guarantee EFM decoder Audio out Digital circuit A 20 Micro controller Mast code e Z ma Te e z amp amp 0000000000000 Correction x DO G0 060988 Y e Pin function O Descroption Bit clock output pin 32fs48fsor 64fs selectable by command L R channel clock output pin L for L channel and H for R channel Output polarity can be inverted by command Audio data output pin MSB first or LSB first selectable by command Digital data output pin Outputs up to double speed playback Correction flag output pin When set to H AOUT output cannot be corrected by C2 correction processing Digital 3 3V power supply voltage pin Digital GND pin Subcode Q data CRCC result output pin H level when result is OK Subcode P W data read I O pin I O polarity selectable by command Subcode P W data output
35. the front chassis assembly forward 4 Release the two joints c on the bottom side of the main body and remove the front chassis assembly in the direc tion of the arrow see Fig 3 1 4 No 49829 Front panel assembly Detach button Front chassis assembly Fig 2 Fig 3 Front chassis assembly Joint c 4 Joint c Fig 4 2 1 3 Removing the heat sink See Fig 5 1 Remove the two screws C and one screws D on the left side of the main body 2 1 4 Removing the bottom cover See Figs 6 and 7 Prior to performing the following procedure remove the front panel assembly front chassis assembly and heat sink 1 Turn over the body and release the two joints d two joints e and joint f CAUTION Do not damage the main board when releasing the joint d us ing a screwdriver See Figs 6 and 7 Joint d 4 lt i a _ SER ve o YA Ha LI KD SC900R Heat sink Fig 5 Bottom cover kw m L 0 j Jue Joint f Bottom cover Fig 6 Joint e Joint e No 49829 1 5 KD SC900R 2 1 5 Removing the rear bracket See Fig 8 Rear bracket G F G Prior to performing the following procedure remove the front panel assembly front chassis assembly heat sink and bottom cover 1 Remove the three screws E one screws F and two screws G on the back of the body 2 Remove the rear bracket Insert Subwoofer and steering cables into the slots Fig 8 2 1 6 R
36. trol STDBY Stand by input RL Output for rear Lch FR Output for front Rch GND Power GND VP1 Power input RL Output for rear Lch RR Output for rear Rch VP3 Power input CO N o1 B amp B WwW DM GND Power GND FL Output for front RR Output for rear Rch MUTE Muting control input RIPPLE Ripple filter FL Output for front RRIN Rear Rch input GND Power GND FRIN Front Rch input NC Non connection SGND Signal GND No 49829 1 33 KD SC900R 4 7 LA6579H X 1C501 4 Channel bridge driver e Pin layout amp Block diagram VIN1 A VIN1 A VCCP1 VO VO VO2 VO2 FR VO3 VO3 VO4 VO4 VCCP2 VINA VIN4G 1 34 No 49829 NO 3 a jo fel fa fo fw o E JJ 12 14 00 Oo E NUN A nid JlIUS 8497 VINT SW H OP AMP A L OP AMP B A A yl SWA A e AA Vi A Signal system power supply Power system GND Signal system power supply VIN 1 VIN1 B VIN1 B S GND VIN1 SW MUTE VREFIN FR VCCS 3 3VREG REGIN VIN2G VIN2 VIN3G VIN3 KD SC900R e Pin function Pin No Symbol Function 1 VIN1 A
37. ut H power on 76 CDON CD power control 77 MUTE O Muting output L muting on 78 DIMOUT O Dimmer detector output 79 80 NC Not use 81 VDD Power supply 82 NC Not use 83 VOLDA O Data output for e volume IC 84 VOLCL O Clock output for e volume IC 85 to 89 NC Not use 90 STAGE Not use 91 BUCK O DSP IC interface clock output 92 CCE O DSP IC interface chip enable signal output 93 RST O DSP IC reset output L reset 94 TEST Test terminal 95 BUSO I O DSP IC interface data input output O 96 BUS1 I O DSP IC interface data input output 1 97 BUS2 WO DSP IC interface data input output 2 98 BUS3 WO DSP IC interface data input output 3 99 NC Not use 100 CDRW O RF gain control L CD RW H CD DA No 49829 1 47 KD SC900R 4 18 TEA6320T X IC161 E volume e Pin layout Block diagram e Pin functions 1 2 3 4 5 6 7 8 9 POWER SUPPLY VOLUME 1 20 to 31 dB LOUDNESS SOURCE SELECTOR LOUDNESS RIGHT TES 22 25 24 26 27 Functions VOLUME i BASS TREBLE RIGHT 12 dB 28 Pin MUTE FUNCTION ZERO CROSS DETECTOR VOLUME 2 0 to 55 dB BALANCE FENDER REAR VOLUME 2 0 to 55 dB BALANCE FENDER FRONT VOLUME 2 0 to 55dB BALANCE FENDER FRONT VOLUME 2 0 to 55dB BALANCE FENDER REAR Serial data input output Ground output left rear output left front Treble control capacitor left channel or input f
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