JVC CA-MXKA6 Service Manual Download

Page: 22 / 63

MX-KA6

1-22

1. Block Diagram

2. Test Circuit

Description of major ICs STK412-0

0 (IC301) : Dual low noise operational

TR41

TR51

R41

R51

D41

D51

D43

D42

D53

D52

Comparator

1110

TR1

TR2

TR3

TR4

TR5

TR6

TR7

TR8

TR9

TR10

TR11

TR12

TR13

TR14

TR15

TR16

TR17

TR18

TR19

TR20

R11

R12

R13

R14

R15

R16

R17

C11

C12

D12

SUB

(*1)Metal Plate Cement Resistor 0.22ohm+-10%(5W)

SUB.GND

1 2 3 4 5 6 7 8 9 10 11 12 13 14

17 18

15 16

+VH

+VL

GND

-VL

-VH

GND

Ch1 OUT

GND

Ch1 IN

Ch2 IN

GZA
15X

1.5kohm
/1W

100uF
/100V

100uF
/50V

100uF
/100V

100ohm/1W

56kohm

100pF

3pF

560ohm

33kohm

100uF
/10V

56kohm

470pF

2.2uF
/50V

1kohm

3uH

Ch2 OUT

4.7ohm

4.7ohm/1W

0.1uF

Summary of Contents for CA-MXKA6

Page 1: ...nt for laser products 1 4 Disassembly method 1 5 Adjustment method 1 18 Flow of functional operation until TOC read 1 20 Maintenance of laser pickup 1 21 Replacement of laser pickup 1 21 Description of major ICs 1 22 CA MXKA6 SP MXKA6 SP MXKA6 Area Suffix UW Latin America MX KA6 SERVICE MANUAL COMPACT COMPONENT SYSTEM Wiring connection 1 33 ...

Page 2: ...uired the original lead routing and dress should be observed and it should be confirmed that they have been returned to normal after re assembling 5 Leakage currnet check Electrical shock hazard testing After re assembling the product always perform an isolation check on the exposed metal parts of the product antenna terminals knobs metal cabinet screw heads headphone jack control shafts etc to be...

Page 3: ...er diode in the optical pickup The testers 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 pro...

Page 4: ...ation when the drawer is open and the safety interlocks have failed or are defeated It is dangerous to defeat the safety switches Important for laser products FUSE CAUTION CAUTION REPLACE WITH SAME TYPE AND RATING FUSE S ATTENTION REMPLACER PAR UN LES FUSIBLE S DE MEME TYPE ET DE MEME VALEUR 5 CAUTION If safety switches malfunction the laser is able to function 6 CAUTION Use of controls adjustment...

Page 5: ... loading motor and belt of the CD changer tray Replacing the CD tray rotor belt of CD changer and removing the motor Front panel assembly Removing the cassette deck mechanism Removing the earphone jack PCB Removing the control FL PCB Removing the switch PCB and ACTIVE BASS EX switch PCB Removing the cassette deck main motor and replacing the main belts Removing the leaf switches of the cassette de...

Page 6: ...fuses with the specified ratings Replacing the heat sink cover See Fig 3 1 Remove four screws B from the rear panel 2 Pull the heat sink cover outward Fig 1 Replacing the power IC See Fig 2 Prior to performing the following procedure remove the top cover 1 Remove the two screws A from the heat sink between the power IC 2 Remove the solder fixing the power IC A Fig 2 Fig 3 B Fuse F952 T3 15A 250V F...

Page 7: ...ain the top cover from the panel rear of the body 2 Remove six screws D that retain the top cover from the two sides of the body 3 Remove the top cover from the body by lifting it toward the rear Fig 5 Fig 4 Right Front panel assembly D D Left Front panel assembly D D Top cover C C ...

Page 8: ...ent damage a From the front panel side of this set push in the sections marked with arrows and pull out the CD tray toward the front b Remove the CD tray panel by pushing both of its extremities upward in the direction of the arrows c Push the CD tray deep into the set 1 Disconnect the cord wires from the CD PCB CN703 and CN203 2 From the rear of the set remove two screws E three screws F and four...

Page 9: ...1 on the power amp PCB 2 Remove one screws H retaining the front panel assembly onto the bottom of the body 3 Remove two screws I on the left and right side of the set retaining the panel front from the bottom and then remove then GND lug b that comes from the power amp and supply PCB 4 Disengage the claws c on both sides of the front panel assembly and then remove the assembly Fig 10 H Fig 11 I e...

Page 10: ...03B and CN604 on the CD PCB which is located on the back side of the CD changer unit 2 The four screws J that retain the CD PCB should be removed 3 Remove the CD PCB by pulling it toward the side where the CN601 is located 4 Using solder short the CD pickup to connect to short round Caution After re connecting the wires be sure to remove the shorting solder from the GND connection 5 Disconnect the...

Page 11: ...cedures remove the top cover Also remove the CD changer unit 1 Turn the CD changer mechanism cover base and remove the screws d connecting the unit to the CD changer mechanism assembly 2 Removing four screws e retaining the CD mechanism holder assembly Caution When replacing the CD changer mechanism assembly be sure not to mistake the positions of the silver color and copper color spring CD change...

Page 12: ...over Also open the CD changer tray 1 Remove the two screws L retaining the CD changer tray loading motor 2 Remove the two screws M retaining the gear plate and take it out after remove the rotor belt from the pulley Replacing the CD turn table and remov ing the motor See Fig 19 Prior to performing the following procedures remove the top cover Also remove the CD changer unit 1 Remove the one screws...

Page 13: ...rews Z retaining the cassette deck mechanism Removing the earphone jack PCB See Fig 20 Prior to performing the following procedures remove the top cover Also remove the CD changer unit Also remove the front panel assembly 1 Remove the screw with the washer P that retains the earphone jack PCB Removing the control FL PCB See Fig 21 Prior to performing the following procedures remove the top cover A...

Page 14: ...el assembly 1 Pull out the volume control knob from the front of the front panel assembly Fig 22 2 Remove six screws Q retaining the front panel assembly Fig 21 3 Remove the control FL PCB 4 Remove eleven screws R retaining the switch key 1 PCB Fig 20 5 Remove two screws S retaining the sound mode and CD function key 2 switch PCB Fig 21 Fig 22 Fig 23 Volume knob Front panel assembly Volume shaft F...

Page 15: ...ches 5 Pull out the leaf switches from the front side of the cassette deck mechanism Removing the cassette deck main motor and replacing the main belts See Fig 19 24 and 25 Prior to performing the following procedures remove the top cover and both sides board Also remove the CD changer unit Also remove the front panel assembly 1 Remove six screws Z retaining the cassette deck mechanism Fig 19 2 Re...

Page 16: ...e faces up 3 Remove the solder from the bottom side of the head terminal and disconnect the wire 4 Remove screw U that retains the head 5 Remove screw V that retains the head 6 Hold the head and slide it in the direction of the arrow to remove it Removing the 3 pin regulator and bridge diode See Q904 Q907 D901 D914 and Fig 28 Prior to performing the following procedures remove the top cover and bo...

Page 17: ...ink holder 4 Remove two screws X that retain the speaker terminals and AUX terminal 5 Remove screws YY that retains the rear panel and then remove the rear panel 6 Disconnect the parallel wires from the connectors FW951 on the power trans PCB 7 Remove the clamp of AC power cord from the chassis 8 Remove four screws AB that retain the power trans PCB and then remove the assembly Fig 29 Fig 30 Fig 3...

Page 18: ...1710kHz 9kHZ FM 87 5MHz 108MHz 50HZ 100kHZ Standard measurement positions of volume and switch Power Standby Light STANDBY Indicator Sound Turbo A BASS EX OFF Sound mode OFF Main VOL 0 Minimum Travers mecha set position Disc 1 Precautions for measurement 1 Apply 30pF and 33kohm to the IF sweeper output side and 0 082 F and 100kohm in series to the sweeper input side 2 The IF sweeper output level s...

Page 19: ...nged Use the High Impedance Probe or Frequency counter input Cassette Head Azimuth Alignments Recording Bias Frequency Alignment Items Measurement conditions Measurement method Standard values Adjusting positions 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 3 Change the receiving frequency t...

Page 20: ...tic measurement of TE amplitude and automatic tuning of TE balance 500mv div 2ms div Fig 1 Approx 3sec pin 20 of IC611 TE Approx 0 3V 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 Track...

Page 21: ...ase 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 1 The level of RF output EFM output ampli tude of eye pattern will below 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 po...

Page 22: ...R6 R7 R11 R12 R13 R14 R15 R16 R17 C1 C2 C11 C12 D2 D12 7 SUB 1 Metal Plate Cement Resistor 0 22ohm 10 5W SUB GND 1 2 3 4 5 6 7 8 9 10 11 12 13 14 17 18 15 16 VH VL GND VL VH GND Ch1 OUT GND Ch1 IN Ch2 IN GZA 15X GZA 15X 1 5kohm 1W 1 5kohm 1W 100uF 100V 100uF 50V 100uF 50V 100uF 100V 100uF 100V 100uF 100V 100ohm 1W 100ohm 1W 1 1 1 1 56kohm 56kohm 100pF 100pF 3pF 3pF 560ohm 560ohm 33kohm 100uF 10V 1...

Page 23: ...MX KA6 1 23 1 Pin descriptions 2 Block diagram Optical disc ICs BA5936S IC621 ...

Page 24: ...n SW PBOUT R PB NF1 R AIN R BIN L GND V CC ALC DET GND IREF Test mode Open for normal use REC RETURN BIN R RECOUT R PB NF2 L NC NC EQOUT L RECIN L TAI L PB EQ L ALC L PBOUT L RECOUT L High Norm A REC Return ON OFF MUTE ON OFF REC MUTE OFF ON 21 22 23 24 25 26 27 28 29 30 Pin Description Equivalent Circuit cont VCC 12V Ta 25 C No Signal The value in the table shows typical value 33 RIP V VCC 2 VCC ...

Page 25: ... BIN L 37 BIN R V 0 V PB NF BIN REC Return VCC 120 k PB B deck input 32 AIN L 39 AIN R V 0 V PB NF AIN GND VCC 120 k PB A deck input 24 RECIN L 7 RECIN R V VCC 2 REC EQ input 27 TAI L 4 TAI R V VCC 2 VCC 2 VCC 100 k Tape input Pin Description Equivalent Circuit VCC 12V Ta 25 C No Signal The value in the table shows typical value Pin No Pin Name Note Equivalent Circuit Description ...

Page 26: ...izer refernce current input 18 36 GND GND pin 6 9 22 25 38 NC NC pin 20 Test mode GND TEST Test mode pin 31 PB NF1 L 40 PB NF1 R 30 PB NF2 L 1 PB NF2 R V 0 6 V VCC 330 k 180 PBNF1 PBNF2 PB EQ feed back Pin Description Equivalent Circuit cont VCC 12V Ta 25 C No Signal The value in the table shows typical value Pin No Pin Name Note Equivalent Circuit Description ...

Page 27: ... 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 19 TEBPF I VDET ...

Page 28: ...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 Track cross signal...

Page 29: ...al 11 AM_IF IN I Input of AMIF signal 12 AGC I AGC voltage 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 te...

Page 30: ...UT 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 31: ... 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 TC74HC4094AP IC402 8 bit shift and store resister ...

Page 32: ...nput 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 of PLL Input for active lowpassfilt...

Page 33: ...N BI1205441U P N BI1205291U P N BI12P100035U P N BI12P60142U P N BI1205261U P N BI12P30215U P N BI12P80102U P N BI1205241U P N BI1205251U P N BI1205281U P N BI1203941 P N BI12P60143U P N BI12P90055U P N BI12P40251U Wiring connection ...

Page 34: ...MX KA6 No MB028 200308 VICTOR COMPANY OF JAPAN LIMITED AV MULTIMEDIA COMPANY AUDIO VIDEO SYSTEMS CATEGORY 10 1 1Chome Ohwatari machi Maebashi city 371 8543 Japan Printed in Japan ...

Page 35: ...COMPANY OF JAPAN LTD SCHEMATIC DIAGRAMS Block diagram Standard schematic diagrams Printed circuit boards 2 1 2 2 2 8 2 12 Contents CD ROM No SML200308 MX KA6 COMPACT COMPONENT SYSTEM MX KA6 CA MXKA6 SP MXKA6 SP MXKA6 Area Suffix UW Latin America ...

Page 36: ...n the silk screen printed side parts side of the PWB diagrams the parts that are printed over with black such as the resistor diode and ICP or identified by the mark nearby are critical for safety This regulation does not correspond to J and C version ...

Page 37: ...MX KA6 2 1 A B C D E F G 1 2 3 4 5 Block diagram ...

Page 38: ...MX KA6 2 2 MX KA6 Standard schematic diagrams A B C D E F G 1 2 3 4 5 Main section ...

Page 39: ...MX KA6 2 3 A B C D E F G 1 2 3 4 5 Tuner section ...

Page 40: ...MX KA6 2 4 MX KA6 A B C D E F G 1 2 3 4 5 CD section ...

Page 41: ...MX KA6 2 5 A B C D E F G 1 2 3 4 5 Power Amplifier ...

Page 42: ...MX KA6 2 6 MX KA6 A B C D E F G 1 2 3 4 5 FL Display and CPU control ...

Page 43: ...MX KA6 2 7 A B C D E F G 1 2 3 4 5 Power transformer section ...

Page 44: ...MX KA6 2 8 MX KA6 Printed circuit boards Main top PWB A B C D E F G 1 2 3 4 5 ...

Page 45: ...MX KA6 2 9 A B C D E F G 1 2 3 4 5 Main bottom PWB ...

Page 46: ...MX KA6 2 10 MX KA6 A B C D E F G 1 2 3 4 5 FL Display and CPU TOP ...

Page 47: ...MX KA6 2 11 A B C D E F G 1 2 3 4 5 FL Display and CPU BOTTOM ...

Page 48: ...MX KA6 2 12 MX KA6 A B C 1 2 3 4 5 Power Amp PWB A B C D 1 2 3 4 5 Power trans PWB ...

Page 49: ...MX KA6 M E M O ...

Page 50: ...MX KA6 No MB028SCH 200308 VICTOR COMPANY OF JAPAN LIMITED AV MULTIMEDIA COMPANY AUDIO VIDEO SYSTEMS CATEGORY 10 1 1Chome Ohwatari machi Maebashi city 371 8543 Japan Printed in Japan ...

Page 51: ...No M1 CD changer mechanism assembly and parts list Block No MA Cassette mechanism assembly and parts list Block No MP Electrical parts list Block No 01 05 Packing materials and accessories parts list Block No M3 M5 Note Parts number of normal capacitors and normal resistors doesn t listed on the parts list MX KA6 3 3 3 5 3 7 3 8 3 12 Area suffix UW Brazil Mexico Peru ...

Page 52: ...MX KA6 3 2 M E M O ...

Page 53: ...d Amp board Volme board Headphone board Transformer board Switch board F951 F952 F953 1 16 35 57 40 21 25 38 51 62 12 13 10 11 22 39 66 56 66 2 3 8 7 6 5 54 63 22 56 56 20 30 9 42 61 15 64 17 60 57 53 33 55 29 32 56 66 36 58 53 53 66 66 53 59 37 42 31 9 20 4 67 23 18 56 24 34 26 27 52 14 68 28 66 54 41 65 19 65 54 66 56 56 56 53 53 ...

Page 54: ...107465010101 CASS HOLDER R 1 14 CASSETTE MECHA 1 CMZT6Z219A 15 BI107477010101 CD EJECT BUTTON 1 16 BI107463010101 CD FITTING 1 17 BI107471010101 CD SEL BUTTON A 1 18 BI202547010101 CHAS MAIN 1 19 BI107483010101 HEAT SINK COVER 1 20 BI301388010101 DAMPING GEAR 2 21 BI107464020101 DISPLAY WINDOW 1 22 BI103362020102 EVA FOOT 2 23 BI301779010101 EVA FOOT C 2 24 BI107473010101 FRAME CD SELECT 1 25 BI10...

Page 55: ...MX KA6 3 5 CD changer mechanism assembly and parts list Block No M M M A 7 6 2 13 1 3 4 17 16 14 15 19 21 22 18 20 5 37 38A 37 38A 37 38B 37 38B 36 39 32 24 23 25 26 27 29 28 34 33 35 12 11 8 9 10 ...

Page 56: ... BI3711003379 CONNECTOR HEADER 1 16 BIAJ4100601K PCB SW 1 17 BIAJ6100601K PULLEY MOTOR 1 1X4 18 BIAJ3100601F MOTOR DC 1 19 BI3710001248 CONNECTOR SOCE 1 20 BI3711003692 CONNECTOR HEADER 1 21 BI3708001163 CONNECTOR FPC 1 22 BIAJ4100601L PCB MECHA 1 23 BIAJ7200601P TRAY ROULETTE 1 1X2 24 BIAJ7200601Q TRAY DISC 1 1X2 25 BIAJ6600601Q GEAR ROULETTE 1 1X4 26 BIAJ6600601P GEAR WORM 1 1X2 27 BIAJ3100601K ...

Page 57: ...Cassette Mechanism Assembly Unit L SIDE TYPE R SIDE TYPE Cassette mechanism assembly and parts list Block No M M M P Item Parts number Parts name Area A Parts list Cassette mechanism Q ty Description Block No MPMM 1 BIF513858 PLATE HD BLK 1 2 BIF525346 MTR MAIN BLK 1 3 BIF567843 PCB CONTROL BLK 1 4 BIUE20P12 LEAF SWITCH 3 5 BIF522063 CLUTCH ASSY BLK 2 6 BIFF19N31 MAIN BELT 1 7 BIF51435 ROLLER PINC...

Page 58: ...W R JACK RCA 213D2 JA302 BI2301201 TERMINAL ANT PST 404 4P LC1 BI29GFMB3TP0151 BAND PASS FILTER GFMB3 T L1 BI26022000KM002 FIXED INDUCTOR 2 2UH L2 BI605082 AM PACK COIL 7RBW L3 BI7A0170 FM COIL 5MMX3 5T L301 BI605071 BIAS COIL 864306 L304 BI18A843556N000 F BEAD F B 843556 L306 BI18A843556N000 F BEAD F B 843556 L307 BI18A843556N000 F BEAD F B 843556 L4 BI7A0171 FM COIL FT12 2 5T L5 BI26101000KM002 ...

Page 59: ...4TKA011 Q722 DTC114TK TRANSISTOR BI2DTC114TKA011 Q723 DTC114TK TRANSISTOR BI2DTC114TKA011 Q724 DTC114TK TRANSISTOR BI2DTC114TKA011 Q725 DTC114TK TRANSISTOR BI2DTC114TKA011 Q726 DTC114TK TRANSISTOR BI2DTC114TKA011 Q727 DTC114TK TRANSISTOR BI2DTC114TKA011 Q728 DTC114TK TRANSISTOR BI2DTC114TKA011 SW701 BI804221 JOG SWITCH PVB20FHIN S1 BI8EVQ21405P015 TACT SWITCH S TURBO S1002 BI8EVQ21405P015 TACT SWI...

Page 60: ...99GP000 Q104 KTA1267GR TRANSISTOR BI2KTA1267GP000 Q105 KTC3199GR TRANSISTOR BI2KTC3199GP000 Q203 KTC3199GR TRANSISTOR BI2KTC3199GP000 Q204 KTA1267GR TRANSISTOR BI2KTA1267GP000 Q205 KTC3199GR TRANSISTOR BI2KTC3199GP000 Q307 KTC3199GR TRANSISTOR BI2KTC3199GP000 Q334 KRA107M TRANSISTOR BI2KRA107MP0008 Q335 KRA107M TRANSISTOR BI2KRA107MP0008 Q336 KTC3199GR TRANSISTOR BI2KTC3199GP000 Q337 KTC3199GR TRA...

Page 61: ...MX KA6 3 11 M E M O ...

Page 62: ...MX KA6 3 12 Packing materials and accessories parts list Block No M M M 3 Block No M M M 5 FRONT 6 P 9 P 7 A5 A6 P 4 A1 P 2 P 5 P 1 P10 A7 A8 P 8 A2 A4 P 6 P 3 ...

Page 63: ...ET P 7 BI4710311 POLY BAG 1 INSTRUCTIONS P 8 BI4710511 POLY BAG 1 AM LOOP P 9 BI4512351 POLY FORM 1 TOP P10 BI4512361 POLY FORM 1 BOTTOM Item Parts number Parts name Area A Parts list Accessories Q ty Description Block No M5MM A 1 BI600MXKA6380 REMOTE CONTROL 1 A 2 BATTERY 2 A 3 BIAN01031 AM LOOP ANT 1 A 4 BIAN01012 ANT WIRE 1 A 5 BI4412071U INSTRUCTIONS 1 LVT1014 008A A 6 BI23A0094 PLUG CONVERSIO...

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