JVC KD-SX997R Service Manual Download

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KD-SX998R,KD-SX997R

(No.49819)1-5

2.1.3 Removing the heat sink

(See Fig.5)

(1) Remove the two screws

and two screws

on the left

side of the main body.

Fig.5

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

, two joints

and joint

CAUTION:

Do not damage the main board when releasing the joint

using a screwdriver. (See Figs.6 and 7)

Fig.6

Fig.7

Heat sink

Joint

Bottom cover

Joint

Bottom cover

Summary of Contents for KD-SX997R

Page 1: ...EIVER 49819 2003 03 KD SX998R KD SX997R TABLE OF CONTENTS 1 Important Safety Precautions 1 2 2 Disassembly method 1 4 3 Adjustment 1 23 4 Description of major ICs 1 27 SOUND VOL VOL SOURCE R F U D ATT Area Suffix E Continental Europe EX Central Europe MODEL KD SX998R KD SX997R Panel color Black Silver ...

Page 2: ... Precautions 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 Please use enough caution not to see the beam directly or touch it in case of an adjustment or operation check ...

Page 3: ...ser 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 pro...

Page 4: ...bly 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 the front chassis assembly forward Fig 2 Fig 3 Fig 4 Front panel assembly Detach ...

Page 5: ... 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 c two joints d and joint e CAUTION Do not damage the main board when releasing the joint e using a screwdriver See Figs 6 and 7 Fig 6 Fig 7 C D Heat sink Joint d Joint e Joint f Bottom cover Joint e Joint d Joint f Bottom cover ...

Page 6: ...assembly front chassis assembly heat sink bottom cover and rear bracket 1 Remove the two screws H attaching the main board 2 Disconnect the connector CN101 and remove the main board Fig 9 2 1 7 Removing the CD mecha board See Fig 10 Prior to performing the following procedure remove the front panel assembly front chassis assembly heat sink bottom cover rear bracket and main board 1 Remove the five...

Page 7: ...mecha board 1 Remove the three screws K Fig 11 2 1 9 Removing the front board See Figs 12 to 14 Prior to performing the following procedure remove the front panel assembly 1 Remove the four screws L on the back side of the front panel assembly 2 Release the nine joints g 3 Take out the front board Fig 12 Fig 13 Fig 14 K K CD mechanism assembly Top chassis L L L Front panel assembly Joint g Joint g...

Page 8: ...n 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 Fig 1 Fig 2 A A A Joints a Top cover Joints a Top cover ...

Page 9: ...ng the connector board 2 Solder the short circuit point on the pickup 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 wires on the connector board if necessary CAUTION Unsolder the short circuit point after reassembling Fig 3 Fig 4 Fig 5 B Connector board Pickup Short circuit point Joints b Wires Pic...

Page 10: ...ng 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 Fig 6 Fig 7 Connector board DET switch Pickup DET switch Tab c Tab c DET switch wire Feed sw holder ...

Page 11: ...ttaching the chassis unit to the frame 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 Fig 8 Fig 9 Suspension spring L Suspension spring L Suspension spring R Suspension spring R Chassis unit Frame Chassis unit Frame Shafts Shaft Dampe...

Page 12: ...owing 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 Fig 10 Fig 11 Clamper arm spring Chassis rivet assembly Joint d Joint d Clamper assembly Clamper arm spring Clamper assembly Joint d Joint d Chassis rivet assembly ...

Page 13: ...it 1 Remove the screw C and move the loading feed motor as sembly 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 frame as shown in Fig 12 Fig 12 Fig 13 Loading feed motor assembly Loading feed motor assembly C ...

Page 14: ... 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 joint 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 u...

Page 15: ...nd q at the slot of the chassis rivet assembly respectively and join the joint k at a time Fig 19 Fig 20 2 2 10 Removing the top plate assembly See Fig 21 Prior to performing the following procedure remove the top 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 release the two joints r 3 Unsolder the wire m...

Page 16: ...n in the direction of the arrow to release the joint u 2 Unsolder the wire of the mode sw marked s if necessary 3 Turn the select lock arm in the direction of the arrow to re lease the two joints v 4 The select lock arm spring comes off the select lock arm at the same time Fig 22 Fig 23 Mode sw Select lock arm Joint t Link plate Joint u s Top plate Top plate Select lock arm Select lock arm spring ...

Page 17: ... 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 Fig 24 Fig 25 Fig 26 Se...

Page 18: ... 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 CAUTI...

Page 19: ...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...

Page 20: ...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 Fig 35 Fig 36 K Loading gear bracket Loading gear 6 Loading gear 5 Loading gear 3 K Loading gear bracket Loading gear 6 Loading gear 5 Loading gear 7 ...

Page 21: ...ome 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 Fig 37 Fig 38 Fig 39 Fig 40 Slot m Sl...

Page 22: ...he 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 Fig 41 Fig 42 L Turn table L Turn table Spindle motor ...

Page 23: ...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 Standard volume position Balance and Bass Treble volume lndication 0 Loudness OFF Frequency Band FM 87 5MHz 108 0MHz MW 522kHz 1620kHz LW 144kHz 279kHz The cardboard is cut i...

Page 24: ...eye pattern remains closed Tracking loop closed RF signal eye pattern opens TOC read out Jump to the first track Play When the laser diode correctly emits Microprocessor commands SEL TC94A14FA 38 LD CN601 15 No disc display When the disc correctly rotates Microprocessor commands DMO TC94A14FA 41 Spindle motor IC681 7 Tracking Servo Loop ON RF signal Rough Servo Mode CLV Servo Mode Program Area CLV...

Page 25: ...ch waveform appear at IC681 pins 8 and 9 Check the circuits in the vicinity of IC681 pins 8 9 and 15 Check the pickup and its connections NO NO NO NO YES YES YES YES YES Is the disk rotated Does the RF signal appear at RF test point Is the RF waveform at RF test point distorted Proceed to the Tracking section Is 4V present at IC681 pins 6 and 7 Check the spindle motor and its wiring Check the circ...

Page 26: ...e 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 fixed resistor is adjusted while the pick up is functioning normally the laser pickup may be damaged due to excessive current 3 5 Replacement of laser pickup Is RF output 1 0 0 35Vp p Replace it NO YE...

Page 27: ...19 1 27 SECTION 4 Description of major ICs 4 1 BA3220FV X IC361 IC381 Line out amp Pin layout Block diagram 1 7 8 3220 14 REFR REFL FILTER 8 9 10 11 12 13 14 1 2 3 4 5 6 7 INR NFR FIL NFL CL Vcc INL CL LGND OUTL OUTR RGND CR CR ...

Page 28: ... 1 2 3 4 Vcc WP SCL SDA 8 7 6 5 1kbit EEPROM ARRAY 7bit ADDRESS DECODER SLAVE WORD ADDRESS REGISTER 7bit 8bit DATA REGISTER CONTROL LOGIC HIGH VOLTAGE GEN Vcc LEVEL DETECT ACK START STOP Pin name I O Description Vcc Power supply GND Ground 0v A0 A1 A2 IN Slave address set SCL IN Serial clock input SDA IN OUT Slave and word addressserial data input serial data output 1 WP IN Write protect input ...

Page 29: ... Power supply GND GND A0 A1 A2 I No use connect to GND SCL I Serial clock input SDA I O Serial data I O of slave and word address WPIN I Write protect terminal 8 Vdd 7 WPIN 6 SCL 5 SDA A0 1 A1 2 A2 3 GND 4 16kbit EEPROM allay 11bit 11bit 8bit Address decoder Slave Word Address resister Data resister START STOP ACK Control circuit High voltage osc circuit Power supply voltage det IN Vout GND 1 3 2 ...

Page 30: ...put OFF H ANT output ON 8 VCC Connected to VCC 9 BATT DET Low battery detect 10 AUDIO OUT Output voltage is 9V when M or H level applied to CTRL pin 11 CTRL L BIAS OFF M BIAS ON H CD ON 12 CD OUT Output voltage is 8V when H level applied to CTRL pin 13 ILM AJ Adjustment pin for ILM output voltage 14 ILM OUT Output voltage is 10V when M or H level applied to CTRL pin 15 GND Connected to GND 2 1 11 ...

Page 31: ...tate input Block diagram Note CL includes probe and jig capacitance 1 2 3 4 5 6 7 1C 1A 1Y 2C 2A 2Y GND VCC 4C 4A 4Y 3C 3A 3Y 14 13 12 11 10 9 8 Input Output C A Y L X Z H L H H H L Vcc Vcc Input See Function Table 1A 2A 3A 4A 1C 2C 3C 4C 1Y 2Y 3Y 4Y Output Output Output Output Sample as Load Circuit 1 Sample as Load Circuit 1 Sample as Load Circuit 1 1k 1k S1 CL ...

Page 32: ...rangement Pin function H High level L Low level X Irrelevant Z Off Hhigh impedance state of a 3 stage output Block diagram 14 13 12 11 10 9 8 1 2 3 4 5 6 7 Vcc 4C 4A 4Y 3C 3A 3Y 1C 1A 1Y 2C 2A 2Y GND Input Output C A Y L X Z H L L H H H 1Y 2Y 3Y 4Y 1A 1C 2A 2C 3A 3C 4A 4C ...

Page 33: ...formed by connecting an external resistor and capacitor to this pin 76 77 78 CE CL DI I I I Serial data transfer inputs Connected to the controller CE Chip enable CL Synchronization clock DI Transfer data 75 INH I Display off control input INH L VSS Display forced off S1 P1 to S4 P4 L These pins are forcibly set to the segment output port function and held at the low level S5 to S68 L COM1 to COM3...

Page 34: ...o 49819 4 9 LA47505 IC301 Power amp Block diagram Muting On Time Control Circuit protective circuit Mute circuit Protective circuit Ripple Filter Stand by Switch 11 16 14 13 25 15 10 4 1 12 22 17 19 18 21 23 24 2 3 5 8 7 9 20 6 ...

Page 35: ...nput 5 OUTFR Output for front Rch 6 Vcc1 2 Power input 7 OUTRR Output for rear Rch 8 GND2 Power GND 9 OUTRR Output for rear Rch 10 VREF Ripple filter 11 INRR Rear Rch input 12 INFR Front Rch input 13 SGND Signal GND 14 INFL Front Lch input 15 INRL Rear Lch input 16 ONTIME Power on time control 17 OUTRL Output for rear Lch 18 GND3 Power GND 19 OUTRL Output for rear Lch 20 Vcc3 4 Power input 21 OUTF...

Page 36: ... B S GND VIN1 SW MUTE VREFIN VCCS 3 3VREG REGIN VIN2G VIN2 VIN3G VIN3 FR VIN1 A VIN1 A VCCP1 VO VO VO2 VO2 VO3 VO3 VO4 VO4 VCCP2 VIN4 VIN4G FR H L VIN1_SW H OP AMP_A L OP AMP_B 33k 11k Signal system power supply All outputs ON OFF H ON L OFF MUTE Level shift Level shift Power system GND Signal system power supply 3 3VREG External PTP Tr Power system GND Level shift Level shift 33k 11k 11k 33k 33k ...

Page 37: ...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 S...

Page 38: ...o Symbol I O Function 1 NC Not connect 2 A16 I Address input 3 A14 I Address input 4 A12 I Address input 5 12 A7 A0 I Address inputs 13 15 I O1 I O3 I O Data inputs outputs 16 VSS Ground 17 21 I O4 I O8 I O Data inputs outputs 22 CS1 I Chip select input 23 A10 I Address input 24 OE I Output enable input 25 A11 I Address input 26 27 A9 A8 I Address inputs 28 A13 I Address input 29 WE I Write enable...

Page 39: ...F25 X IC651 Regulator Pin layout Block diagram 4 15 NJU7241F33 X IC504 Voltage regulator Pin layout A B 8 7 6 5 1 2 3 4 1 2 3 4 5 6 7 8 AOUTPUT A INPUT A INPUT V B INPUT B INPUT B OUTPUT V GND 1 VIN 2 VOUT 3 5 STB 4 NC Short protect 3 VOUT 1 GND Vref VIN 2 STB 5 GND 1 1 2 3 5 4 PIN FUNCTION 1 GND 2 VIN 3 VOUT 4 NC 5 STB ...

Page 40: ...tem clock 5 XTI I Oscillator input External clock input 6 XTO O Oscillator output 7 DGND Digital ground 8 VDD Digital power 5V 9 VDD2R Analog power 5V 10 AGND2R Analog ground 11 EXTR O Rch common pin of analog output amp 12 NC Non connection 13 VOUTR O Rch analog voltage output of audio signal 14 AGND1 Analog ground 15 Vcc1 Analog power 5V 16 VOUTL O Lch analog voltage output of audio signal 17 NC...

Page 41: ...out Block diagram AMP AGC Detector BPF I V conversion PD Vcc Comp 22k ohm magnetic shield VDD OUT GND for trimming circuit 3 1 2 1 14 28 15 MIX Gain Auto Zero Mixing Stage Loudness Volume Soft Mute Treble Bass Input Multiplexer Mono Beep Beep Supply Digital Control I C Bus Zero Cross Mono Fader Mono Fader Mono Fader Mono Fader Mono Fader Mono Fader 2 ...

Page 42: ...ut to comparator 8 SCOUT Sub carrier output of reconstruction filter 9 MODE Oscillator mode test control input 10 TEST Test enable input 11 GND Ground for digital part 0V 12 Vdd 5V supply voltage for digital part 13 OSCI Oscillator input 14 OSCO Oscillator output 15 T57 57 kHz clock signal output 16 CLK RDS clock output ANTI ALIASING FILTER CLOCKED COMPARATOR COSTAS LOOP VARIABLE AND FIXED DIVIDER...

Page 43: ...OUTPUT PORT Vdd Vcc Pin No Symbol I O Function Pin No Symbol I O Function 1 XOUT O Crystal oscillator pin 13 IFC I IF signal input 2 OSC Non connect 14 VDD Power pins for digital block 3 CE I Chip enable input 15 FMIN I FM band local signal input 4 DI I Serial data input 16 AMIN I AM band local signal input 5 CK I Clock input 17 DGND Connect to GND for digital circuit 6 DOUT O Serial data output 1...

Page 44: ... 20k 20k 3k 180k 240k 240k 15pF 15pF 40pF 40pF 10pF 60k 60k 22k 22k 94k 94k 14k 50k 20k 20k 20k 40k 50k PEAK 15k 40k 2k 1 75k 1 3V 2k 1k 180k 3k 12k 12k 20k 40k 30k 10pF 50 A BOTTOM PEAK K 1 x0 5 x2 x0 5 x2 PIN SEL APC SW TEB TE BAL RFGC AGC Gian TEB TE BAL VCTRLPIN VCC APC ON 50 12dB Normal mode 0dB HiZ APC ON 0 6dB Normal mode 0dB GND APC OFF LDO H 50 0dB CD RW mode 12dB ...

Page 45: ...s tracking search system 12 RFDC O RF signal peak detection output pin 13 GVSW I AGC FE TE amp gain change pin 14 VRO O Reference voltage VRO output pin VRO 1 2VCC When VCC 3 3V 15 FEO O Focus error signal generation amp output pin 16 FEN I 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 F...

Page 46: ... io3 io4 VDD io5 io6 io7 VSSP PDo VCoi VDDP CK0 VDDX Xi Xo VSSX 16 15 14 13 12 11 10 9 8 7 6 5 4 3 2 1 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 Interrupt Control Timer Flag General Output Port Address Calc 2sets X Pointer register Y Pointer register C Pointer register Bus Switch ERAM 2k word CROM 4k word 3 YRAM 4k word XRAM 4k word X Bus Y Bus PRAM 256word Program Control PROM 4k 2 2k 10kwo...

Page 47: ...SRAM address output 11 ter minal 33 AD10 O External SRAM address output 10 ter minal 34 AD9 O External SRAM address output 9 termi nal 35 VDDT Digital power supply terminal 3 3V 36 AD8 O External SRAM address output 8 termi nal 37 AD7 O External SRAM address output 7 termi nal 38 AD6 O External SRAM address output 6 termi nal 39 REQ O Squeeze request terminal to host 40 VSS Digital GND 41 AD13 O E...

Page 48: ...utput pin L for L channel and H for R channel Output polarity can be inverted by command 3 AOUT O Audio data output pin MSB first or LSB first selectable by command 4 DOUT O Digital data output pin Outputs up to double speed playback 5 IPF O Correction flag output pin When set to H AOUT output cannot be corrected by C2 correction processing 6 VDD3 Digital 3 3V power supply voltage pin 7 VSS3 Digit...

Page 49: ...UHS L H output with UHS H 39 AVDD3 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 VDD3 Digital 3 3V power supply voltage pin 44 TESIN I Test input pin Normally fixed to L 45 XVSS3 System clock oscillator GND pin 46 XI I System clock oscillator input pin 47 XO O System clock oscillator output pin 48 XVDD3 System ...

Page 50: ...ring remote signal output 20 RDSSCK I RDS clock input 21 RDSDA I RDS data input 22 REMOCON I Remocon input 23 AVDD A D converter power supply 24 AVREF0 A D reference voltage 25 VOL1 I Volume encoder pulse input 1 26 VOL2 I Volume encoder pulse input 2 27 KEY0 I Key input 0 28 KEY1 I Key input 1 29 KEY2 I Key input 2 30 LEVEL I Level meter input 31 SQ I S quality level input 32 SM I S METER input 3...

Page 51: ...6 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 I Data input from PLL IC 70 TELMUTE I Telephone muting detection input 71 NC 72 VSS GND 73 DIMIN I Dimmer detector input L Dimmer ON 74 PS1 I Power save 1 L ACC off 75 POWER O Power ON OFF control output H Power on 76 CDON O CD power supply control output H CD power on 77 MUTE O Muting outp...

Page 52: ...US data output terminal 18 BUS SCK I O JVC BUS clock input output terminal 19 BUSOUT O JVC BUS BUSOUT output terminal 20 CD ON O Power supply 3 3V control for CD 21 CD REQ O CD mechanism power supply on request signal output terminal 22 CD MUTE O CD mute signal output terminal 23 24 DSP RESET O CD DSP reset signal output terminal 25 CCE O CD DSP chip enable output terminal 26 BUCK O CD DSP data cl...

Page 53: ... supply detection terminal L 8V on 58 REST I CD mechanism rest switch input terminal 59 SW2 I CD mechanism SW2 input terminal 60 RESET I Reset signal input terminal 61 SW1 I CD mechanism SW1 input terminal 62 B DET I Backup power supply detection input terminal H Stop mode 63 P DET I Main power off detection input terminal H HALT mode 64 BUS INT I JVC BUS communication start interrupt input termin...

Page 54: ...KD SX998R KD SX997R 1 54 No 49819 ...

Page 55: ... No 49819 AV MULTIMEDIA COMPANY MOBILE ENTERTAINMENT CATEGORY 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan VICTOR COMPANY OF JAPAN LIMITED 200303WPC Printed in Japan KD SX998R KD SX997R ...

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