JVC CA-MXK3 Page 34 Service Manual Download

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200106(S)

No.20994

MX-K3

VICTOR COMPANY OF JAPAN, LIMITED

AUDIO & COMMUNICATION BUSINESS DIVISION

PERSONAL & MOBILE NETWORK B.U. 10-1,1Chome,Ohwatari-machi,maebashi-city,371-8543,Japan

Summary of Contents for CA-MXK3

Page 1: ...entina ACTIVE BASS EX COMPACT COMPONENT SYSTEM MX K3 STANDBY ON STANDBY PHONES REPEAT PROGRAM RANDOM STOP REC START DUBBING REC START CD CLOCK TIMER TAPE A B DISC SKIP EJECT PLAY A REC PLAY B CD CONTROL C D 1 A U X F M A M C D T A P E C D 2 C D 3 CD R RW PLAYBACK CANCEL SET PRESET TUNNIG DEMO FULL LOGIC CONTROL CD SYNCHRO RECORDING EJECT R O C K CLASSIC P O P V O LUME 3 CD PLAY EXCHANGE SOUND MODE...

Page 2: ...et screw heads headphone jack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord directly into the AC outlet Using a Leakage Current Tester measure the leakage current from each exposed metal parts of the cabinet particularly any exposed metal part having a return path to th...

Page 3: ...ing är denna del är öppnad och spårren är urkopplad Betrakta ej strålen VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle Älä katso säteeseen ADVARSEL Usynlig laserstråling ved åbning når sikkerhedsafbrydere er ude af funktion Undgå udsættelse for stråling ADVARSEL Usynlig laserstråling ved åpning når sikkerhetsbryteren er avslott unngå utsettelse for stråli...

Page 4: ...optical pickup The tester s internal power source can easily destroy the laser diode 4 Handling the CD changer unit optical pickup 1 Do not subject the CD changer 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 t...

Page 5: ...moving the earphone jack board 1 13 Removing the mic amp board 1 14 Removing the control FL board 1 14 Removing the key switch board and ACTIVE BASS EX switch board 1 15 Removing the cassette deck main motor and replacing the main belts 1 16 Removing the leaf switches of the cassette deck mechanism 1 16 Removing the cassette deck heads 1 17 Chassis unit 1 17 Removing the 3 pin regulator 1 17 Remov...

Page 6: ...he heat sink cover to the rear panel Pull the heat sink cover outward Remove the two screws B from the bracket that retains the power IC Remove the solder fixing the power IC Replacing the power IC See Fig 2 to 4 Fig 4 Fig 1 Fig 3 Fig 2 Disassembly of the main blocks of this set Replacement of the fuses and the power IC B A Heat sink Amp board Fuse F951 2 0A 250V Fuse F953 1 25A 250V Power trans b...

Page 7: ...e six screws C that retain the top cover from the rear of the body Remove the two screws D and two screws E retain the top cover from the two sides of the body Remove the top cover from the body by lifting it toward the rear Fig 6 C C C Top cover Front panel assembly D E ...

Page 8: ... connectors CN307 and CN308 on the main board which is located below the CD changer unit Disconnect the card wires from the connectors CN301 CN302 CN305 and CN306 on the main board Disconnect the parallel wires from the connectors CN902A CN902B and CN902C on the power amp and supply board From the rear of the set remove the two screws F retaining the CD changer unit then remove the four screws G r...

Page 9: ...mp board Remove the two screws H retaining the front panel assembly onto the bottom of the body Remove the screw I retaining the cassette deck mechanism and then remove the GND lug b that comes from the amp board Disengage the claws c on both sides at the bottom of the front panel assembly and then remove the assembly Removing the front panel assembly See Fig 11 and 12 Fig 12 H I Amp board Control...

Page 10: ...crew with the washer K that retain the main board should be removed Remove the main board by pulling it toward the side where the CN601 is located Using solder short the CD pickup to connect to short round Disconnect the card wire from the connector CN601 on the main board and then remove the main board Removing the main board See Fig 13 and 14 Fig 14 Disassembly of units and assembly inside this ...

Page 11: ...bly Remove the two screws with the washer L retaining the CD changer mechanism assembly Removing the CD changer mechanism assembly See Fig 15 to 17 Fig 17 Fig 16 Caution When replacing the CD changer mechanism assembly be sure not to mistake the positions of the red and blue dampers Note When re assembling after the disassembly work apply bonding agent on the spring to prevent it from slipping off...

Page 12: ... unit 1 2 3 4 5 6 Remove the two screws N retaining the stopper brackets on both sides of the CD changer unit Remove the stopper brackets from both sides of the CD changer unit Pull out the CD tray from the CD changer unit all the way and then lift the tray upward to remove Turn the CD tray upside down and remove the tray rotor belt from the pulley Turn the CD tray upside down and disconnect the c...

Page 13: ...ck of the front panel assembly Removing the cassette deck mechanism See Fig 22 Prior to performing the following procedure remove the top cover Also remove the CD changer unit Also remove the front panel assembly 1 Remove the screw with the washer Q that retains the earphone jack board from the back of the front panel assembly Removing the earphone jack board See Fig 23 P P Front panel assembly Wi...

Page 14: ... R that retains the mic amp board Removing the mic amp board See Fig 24 and 25 Prior to performing the following procedure remove the top cover Also remove the CD changer unit 1 Remove the three screws S that retain the control FL board from the back of the front panel assembly Removing the control FL board See Fig 26 Fig 24 Fig 25 Fig 26 S Mic level knob Front panel assembly Control FL board Fron...

Page 15: ...me knob shaft Remove the three screws S retaining the control FL board from the back of the front panel assembly Remove the control FL board Remove the eleven screws T retaining the key switch board Remove the two screws U retaining the ACTIVE BASS EX switch board Removing the key switch board and ACTIVE BASS EX switch board See Fig 26 to 29 Fig 28 Fig 29 T T U ACTIVE BASS EX switch board Key swit...

Page 16: ...gths of the cassette A playback only and cassette B record play main belts are different When attaching the main belts use the longer belt for cassette A Prior to performing the following procedures remove the top cover Also remove the CD changer unit Also remove the front panel assembly 1 2 3 4 5 Remove the five screws P that retain the cassette deck mechanism Remove the cassette deck mechanism T...

Page 17: ...ew X that retains the head Hold the head and slide it in the direction of the arrow to remove it Removing the cassette deck heads See Fig 22 and 33 Fig 35 Prior to performing the following procedures remove the top cover 1 2 3 4 Remove the two screws A connecting the heat sink cover to the rear panel Pull the heat sink cover foward you Remove the screw Y that retains the bracket holding the 3 pin ...

Page 18: ...w AB that retain the voltage selector board Except UP UY Disconnect the parallel wires from the connectors CN951A and CN951B on the amp board Remove the screw AC that retain the amp board and then remove the assembly Remove the solders j connecting the six wires Remove the four screws AD that retain the AC power board and then remove the assembly Removing the amp board the voltage selector board a...

Page 19: ...cement 22 5kHz Frequency Range AM 522kHz 1629kHz at 9kHz channel space FM 87 5MHz 108MHz Standard measurement positions of volume and switch Power Standby Light STANDBY Indicator A BUSS switch OFF Sound mode OFF Main VOL maximum Travers mecha set position Disc 1 Mic MIX VOL MAX ECHO OFF Precautions for measurement 1 Apply 30pF and 33kohm to the IF sweeper output side and 0 082 F and 100kohm in ser...

Page 20: ...coil L301 Use the High Impedance Probe for Frequency counter input Cassette Head Azimuth Alignments Recording Bias Frequency Alignment Items Measurement conditions Measurement method Standard values Adjusting positions OSC coil adjustment 1 Set the Signal Generator signal to 530KHz the feed to Loop Antenna 2 Receiving the signal and the adjust the OSC coil L2 obtain the V T is 1 40V 0 05V Antenna ...

Page 21: ...Automatic measurement of TE amplitude and automatic tuning of TE balance 500mv div 2ms div Fig 1 Approx 3sec pin 20 of IC611 TE Approx 1 8V VREF Tracking error waveform at TOC reading Power ON Play Key Confirm that the Focus error S cuve signal at the pin32 of IC601 is approx 2Vp p Confirm that the signal from pin24 IC601 is 0V as a accelerated pulse during approx 400ms Confirm the waveform of the...

Page 22: ... of the laser diode has expired the following symptoms will appear 1 The level of RF output EFM output ampli tude of eye pattern will below Is the level of RFOUT under 1 25V 0 22Vp p Replace it NO YES O K 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 b...

Page 23: ...necting terminal for HPF Amp 10 3TOUT O 3 TENV output terminal 11 CBOO I Capacitor connecting terminal for envelope detection on the darkness side 12 BDO O BDO output terminal 13 COFTR I Capacitor connecting terminal for envelope detection on the light side 14 OFTR O OFTR output terminal 15 NRFDET O NRFDET output terminal 16 GND Ground 17 VREF O VREF output terminal 18 VDET O VDET output terminal ...

Page 24: ...OUT2 O CH2 positive output 5 IN2 I CH2 input 6 IN1 I CH1 input 7 VCC Power supply terminal 8 VCC Power supply terminal 9 REG I I Regulator current detection terminal 10 REG B O Connect to base terminal of external transistor 11 REG OUT O Constant voltage output Connect to collector terminal of external transistor 12 IN3 R I CH3 reverse input 13 IN3 F I CH3 forward input 14 OUT3 O CH3 positive outp...

Page 25: ...oltage input terminal 13 FM_DET O FM detection signal output 14 ST MON_SW I Stereo Monaural switching signal input 15 AM FM_SW I AM FM switching signal input 16 L_OUT O Output L channel 17 R_OUT O Output R channel 18 MPX_IN I Multiplex signal input 19 DET_OUT O AM FM detection output 20 FM_OSC FM local oscillation circuit 21 VCC_2 Power supply terminal 22 FM_RFOUT O Output of FMRF signal 23 GND_2 ...

Page 26: ...pen state after the power on reset Input output port Input output port Data input output Function IF counter signal input IF signal output Not use AM Local OSC signal output FM Local OSC signal input Power supply VDD 4 5 5 5V When power ON Reset circuit move PLL charge pump output H Local OSC frequency Height than Reference frequency L Low Agreement Height impedance Output for active lowpassfilter...

Page 27: ...nal for recording amp 16 REC_OUT2 O Output for recording amp 17 CG O Charge detection terminal 18 VCC Power supply terminal 19 A B_SW I REC amp Select switch A cassette B cassette 20 PREOUT2 O Output terminal for playback amp 21 EQ2 O Metal output for playback amp 22 NF2 I NF terminal for playback amp 23 CH2_B I Input for playback amp Ch2 B cassette REC PB 24 CH2_A I Input for playback amp Ch2 A c...

Page 28: ...C OE Q5 Q6 Q7 Q8 Q S QS Ø Ø Ø Ø Ø Ø ØS D LATCH F F 2 SI D Q Q 3 CK Ø Ø 1 ST 15 OE Q ØS Q D Ø Ø F F ØS ØS D Q ØS ØS LATCH 4 Q1 5 Q2 D Q Q Ø Ø F F D Q ØS ØS LATCH 6 Q3 D Q Q Ø Ø F F D Q ØS ØS LATCH 7 Q4 D Q Q Ø Ø F F D Q ØS ØS LATCH 14 Q5 D Q Q Ø Ø F F D Q ØS ØS LATCH 13 Q6 D Q Q Ø Ø F F D Q ØS ØS LATCH 12 Q7 D Q Q Ø Ø Ø Ø F F D Q ØS ØS LATCH 11 Q8 QS 9 Q S 10 ...

Page 29: ...T MULTIPLEXER GAIN BASS BIN L BASS SPKR ATT RIGHT BOUT R BIN R SUPPLY CREF AGND VS 27 4 5 6 7 3 2 1 28 21 22 20 26 24 25 10 11 19 12 13 23 8 9 18 14 15 RB RB VREF 2 Block diagram LIN3 LIN4 MUXO L IN L MUXO R BIN R IN R BOUT R BIN L 1 3 2 4 5 6 7 8 9 BOUT L N C N C TRE R TRE L SCL SDA DGND CREF 23 22 21 20 19 17 18 16 15 10 11 12 13 14 28 27 26 25 24 RIN3 RIN2 RIN1 LIN1 LIN2 VS AGND ROUT LOUT RIN4 ...

Page 30: ... LOUT FK TK LIN BIAS GND RIN LP LP LP ROUT A B C Power supply Microphone mixing input Channel L output Non connect Non connect Channel L input Signal bias Connect to GND Channel R input Connects to LPF time constant element Connects to LPF time constant element LPF outpout Channel R output Mode select input A Mode select input B Mode select input C I O I I I O O O O I I I Pin No Symbol I O Descrip...

Page 31: ...E CR Connect GND Echo level control Analog part DC bias DA side integrator output DA side integrator intput DA side LPF input DA side LPF output Mix AMP output for original tone echo tone Mix AMP input pin for original tone AD side LPF input AD side LPF output AD side integrator output AD side integrator input Power supply Mute control signal input CR pin for oscillator I I O I O O I I O O I I Pin...

Page 32: ...rive signal Servo error signal output Kick pulse output Tracking drive output Focus drive output Reference voltage for D A output block Focus balance adjust signal output Tracking balance adjust signal output Focus error signal input Analog input Tracking error signal input Analog input RF envelope signal input Analog input Vibration detect signal input H Detect Off track signal input H Off track ...

Page 33: ...p SW board Ass y Active bass EX Switch board Ass y W603 W606 Key switch board Ass y Control FL board Ass y FL TUBE Head phone board Ass y Parallel wire Card wire Parallel wire Card wire Card wire CN901 1 CN603 Color codes are shown below 1 Brown 2 Red 3 Orange 4 Yellow 5 Green 6 Blue 7 Violet 8 Gray 9 White 0 Black A FW701 FW701 FW702 2 FW702 1 1 1 9 2 9 9 6 9 4 CN308 CN307 9 4 0 0 2 0 9 9 0 2 2 9...

Page 34: ...200106 S No 20994 MX K3 VICTOR COMPANY OF JAPAN LIMITED AUDIO COMMUNICATION BUSINESS DIVISION PERSONAL MOBILE NETWORK B U 10 1 1Chome Ohwatari machi maebashi city 371 8543 Japan ...

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