JVC MX-K3 Service Manual
  1. Manuals
  2. Brands
  3. JVC Manuals
  4. Speaker System
  5. MX-K3
  6. Service manual
JVC MX-K3 Service Manual

JVC MX-K3 Service Manual

Compact component system
Hide thumbs Also See for MX-K3:
Table of Contents

Advertisement

Quick Links

See also: Instruction Manual
SERVICE MANUAL
COMPACT COMPONENT SYSTEM
RM-SMXK3U REMOTE CONTROL
1
2
3
STANDBY/ON
4
5
6
SLEEP
7
8
9
AUX
10
+10
FM MODE
FM /AM
CD
1
CD
2
CD
3
CD
PROGRAM
TAPE
/RANDOM REPEAT TAPE A/B
COMPU PLAY
CONTROL
KARAOKE
SOUND
MODE
ECHO
ACTIVE
VOLUME
FADE
BASS EX.
MUTING
Contents
Safety precautions
Important for laser products
Preventing static electricity
Disassembly method
Adjustment method
MX-K3
COMPACT COMPONENT SYSTEM
STANDBY/ON
STANDBY
CANCEL
SET
/ DEMO
PHONES
REC START
REPEAT
PROGRAM
RANDOM
/STOP
MIC
MIC
VOL
COMPU PLAY CONTROL
ACTIVE BASS EXTENSION
MIN
MAX
EJECT
A
PLAY
FULL - LOGIC CONTROL
SP-MXK3
CA-MXK3
1-2
1-3
1-4
1-5
1-19
COPYRIGHT
2001 VICTOR COMPANY OF JAPAN, LTD.
3-CD
PLAY & EXCHANGE
CD-R/RW PLAYBACK
1 BIT
DUAL D/A
ACTIVE
CONVERTER
BASS EX.
PRESET
SOUND
MODE
DISC SKIP
TUNNIG
CD CONTROL
CD
REC START DUBBING
CLOCK
TAPE
/TIMER
A/B
EJECT
B
CD SYNCHRO RECORDING
REC/PLAY
SP-MXK3
UJ
US
UT
UW
UX
UY
operation until TOC read
Area Suffix
US military
Singapore
Taiwan
Brazil, Mexico, Peru
Saudi Arabia
Argentina
1-21
1-22
1-22
1-23
1-33
No.20994
Jun. 2001

Advertisement

Table of Contents
loading

Related Manuals for JVC MX-K3

Summary of Contents for JVC MX-K3

  • Page 1: Table Of Contents

    MX-K3 SERVICE MANUAL COMPACT COMPONENT SYSTEM MX-K3 3-CD PLAY & EXCHANGE CD-R/RW PLAYBACK RM-SMXK3U REMOTE CONTROL MX-K3 COMPACT COMPONENT SYSTEM STANDBY/ON 1 BIT DUAL D/A ACTIVE CONVERTER BASS EX. SLEEP PRESET FM MODE FM /AM STANDBY/ON SOUND STANDBY CANCEL MODE...

  • Page 2: Mx-K3

    MX-K3 1. This design of this product contains special hardware and many circuits and components specially for safety purposes. For continued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replacement parts must be identical to those used in the original circuits. Services should be performed by qualified personnel only.
  • Page 3 MX-K3 Important for laser products 5.CAUTION : If safety switches malfunction, the laser is able 1.CLASS 1 LASER PRODUCT to function. 2.DANGER : Invisible laser radiation when open and inter 6.CAUTION : Use of controls, adjustments or performance of lock failed or defeated. Avoid direct exposure to beam.

  • Page 4: Attention When Traverse Unit Is Decomposed

    MX-K3 Preventing static electricity 1. Grounding to prevent damage by 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.
  • Page 5 MX-K3 Disassembly method Commence disassembly of this set by removing the main units and then proceed to the components and assemblies inside the units. Replacement of the fuses and the power IC Top cover CD changer unit Front panel assembly...

  • Page 6: Replacement Of The Fuses And The Power Ic

    MX-K3 <Disassembly of the main blocks of this set> Fuse (F953) Replacement of the fuses and the power IC 1.25A 250V Fuse (F951) Replacing the fuses (See Fig.1) 2.0A 250V Prior to performing the following procedure, remove Power trans board the top cover.

  • Page 7: Top Cover

    MX-K3 Removing the top cover (See Fig.5 and 6) Top cover Remove the 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.

  • Page 8: Cd Changer Unit

    MX-K3 CD tray panel Removing the CD changer unit (See Fig.7 to 10) Prior to performing the following procedures, remove the top cover. [Caution] Although the CD mechanism unit can be removed without removing the CD tray panel, it is still recommended to remove it in order to prevent damage.

  • Page 9: Front Panel Assembly

    MX-K3 Removing the front panel assembly (See Fig.11 and 12) Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. Disconnect the parallel wire and card wire from the connectors CN1101,CN901,CN951A and CN951B on the amp. board.

  • Page 10: Removing The Main Board

    MX-K3 <Disassembly of units and assembly Main board inside this set> Removing the main board CN601 (See Fig.13 and 14) Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. Disconnect the wires from CN602 and CN603 on the main board, which is located on the backside of the CD changer unit.

  • Page 11: Removing The Cd Changer Mechanism Assembly

    MX-K3 Removing the CD changer mechanism assembly (See Fig.15 to 17) Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. Remove the spring "d" from the front surface of the [Note] CD changer mechanism unit.

  • Page 12: Removing The Cd Pickup

    MX-K3 Removing the CD pickup (See Fig.18) CD pickup Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. Also remove the CD changer mechanism Widen the section "f ". While keeping the section "f" wide open, push the section "g"...

  • Page 13: Removing The Cassette Deck Mechanism

    MX-K3 Front panel Removing the cassette deck mechanism assembly (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 five screws "P" retaining the cassette deck mechanism and then remove the wire clamp lug "h"...

  • Page 14: Removing The Mic Amp. Board

    MX-K3 Removing the mic amp. board (See Fig.24 and 25) Front panel assembly Prior to performing the following procedure, remove the top cover Also remove the CD changer unit. Also remove the front panel assembly. Pull out the mic level knob from the front of the front panel assembly.

  • Page 15: Removing The Key Switch Board And Active Bass Ex. Switch Board

    MX-K3 Removing the key switch board and ACTIVE BASS EX. switch board Front panel assembly (See Fig.26 to 29) Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. Also remove the front panel assembly.

  • Page 16: Removing The Cassette Deck Main Motor, And Replacing The Main Belts

    MX-K3 Removing the cassette deck main motor, and replacing the main belts Cassette deck mechanism (Front side) (See Fig.22, 30 and 31) Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. Also remove the front panel assembly.

  • Page 17: Removing The Cassette Deck Heads

    MX-K3 Removing the cassette deck heads Cassette deck mechanism (See Fig.22 and 33) (Front side) Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit. PB Head REC/PB Head Also remove the front panel assembly.
  • Page 18 MX-K3 Removing the amp. board, the voltage Rear panel selector board and the AC power board (See Fig.2, 3, 34, 36 to 39) Speaker terminal Prior to performing the following procedures, remove the top cover. Also remove the CD changer unit.
  • Page 19 MX-K3 Adjustment method Measurement instruments required for adjustment Radio input signal 1. Low frequency oscillator, AM modulation frequency : 400Hz This oscillator should have a capacity to output 0dB Modulation factor : 30% to 600ohm at an oscillation frequency of 50Hz-20kHz.

  • Page 20: Tuner Section

    MX-K3 Arrangement of adjusting positions Cassette deck mechanism (Front side) CN308 PB Head REC/PB Head (Deck-A) (Deck-B) 8-Pin L301 FM VT voltage measurement point Head azimuth screw Head azimuth screw AM VT voltage (Forward side) (Forward side) measurement point Head screw...

  • Page 21: Flow Of Functional

    MX-K3 Flow of functional operation until TOC read Check Point Slider turns REST Play Key Power ON Confirm that the voltage at the pin5 SW ON. of CN602 is "H"\"L"\"H". Automatic tuning of TE offset Check that the voltage at the...

  • Page 22: Maintenance Of Laser Pickup

    MX-K3 Replacement of laser pickup Maintenance of laser pickup (1) Cleaning the pick up lens Before you replace the pick up, please try to Turn off the power switch and,disconnect the clean the lens with a alcohol soaked cotton power cord from the AC OUTLET.

  • Page 23: Description Of Major Ics

    MX-K3 Description of major ICs AN22000A (IC611) : CD-DA Head Amp. 1. Terminal layout 2. Pin function Function Function Symbol I/O Symbol I/O APC Amp. input terminal 15 NRFDET O NRFDET output terminal O APC Amp. output terminal 16 GND...
  • Page 24 MX-K3 BA15218 (IC102) : Dual low noise operational amp. 1. Terminal layout OUT1 - IN1 OUT2 +IN1 - IN2 +IN2 BA5936S (IC621) : 6 channel BTL driver 1. Block diagram BIAS MUTE 13.3k x3/8 x3/8 13.3k LEVEL SHIFT LEVEL SHIFT LEVEL SHIFT T.S.D...
  • Page 25 MX-K3 LA1823 (IC1) : 1chip AM/FM, MPX tuner system 1. Block diagram GND2 VCC2 MUTE PHASE PILOT DECODER COMP ST SW TRIG S-METER BUFFER BUFFER VCC1 GND1 2. Pin function Function Function Symbol Symbol AM_RFIN AMRF signal input FM_DET FM detection signal output REG.
  • Page 26 MX-K3 LC72136 (IC2) : PLL Frequency synthesizer 1.Terminal layout LPFI LPFO CLOCK VCOSTOP FMIN AM/FM AMIN IFCNT SDIN IFIN 2. Block diagram Phase Reference Detector Driver Charge Pump Swallow Counter Swallow Counter 1/16,1/17 4bit 1/16,1/17 4bit Unlock Detector 12bit Programmable...
  • Page 27 MX-K3 TA8189 (IC401) : REC/PB amp. 1. Terminal layout 2. Block diagram CH1_A CH2_A CH1_B CH2_B CH2_B 14 REC_IN2 PREOUT1 PREOUT2 MIX_OUT A/B_SW CH2_A GND1 13 ALC EQSW REC_OUT1 REC_OUT2 REC_NF1 REC_NF2 12 GND CH1_A REC_IN1 REC_IN2 11 REC_IN1 CH1_B 3.

  • Page 28: Block Diagram

    MX-K3 TC74HC4094 (IC402) : 8-bit shift and store resister 1. Terminal layout 2. Block diagram Q' S Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø Ø...
  • Page 29 MX-K3 TDA7440D (IC101) : Audio processor 1. Terminal layout RIN3 RIN4 RIN2 LOUT RIN1 ROUT LIN1 AGND LIN2 LIN3 CREF LIN4 MUXO-L IN(L) DGND MUXO-R TRE(R) IN(R) TRE(L) BIN(R) N.C. BOUT(R) N.C. BIN(L) BOUT(L) 2. Block diagram MUXO-L IN(L) TRE(L)
  • Page 30 MX-K3 BA3837 (IC301) : MIC Mixer 1.Block diagram ROUT LOGIC LOUT BIAS 2.Pin function Pin No. Symbol Description Power supply Microphone mixing input Channel L output LOUT Non connect Non connect Channel L input Signal bias BIAS Connect to GND...
  • Page 31 MX-K3 BU9253FS (IC851) : KARAOKE echo 1.Terminal layout & block diagram MUTE ECHO VR BIAS ADINTI DAINO ADINTO DAINTI ADLPFO DALPFI ADLPFI DALPFO MIXI MIXO 2.Pin function Description Pin No. Symbol Connect GND Echo level control ECHO VR Analog part DC bias...
  • Page 32 MX-K3 MN662748RPM (IC601) : Digital servo & digital signal processor 1. Terminal layout 80~61 21~40 2. Pin function Symbol Function Symbol Function 1 BCLK Not use 41 PLLF2 Not use 2 LRCK Not use 42 TOFS Not use 3 SRDATA...

  • Page 33: Wiring Connections

    MX-K3 Wiring connections 1-33...

  • Page 34: Mx-K3

    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 No.20994 200106(S)

This manual is also suitable for:

Sp-mxk3Ca-mxk3

Table of Contents