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SERVICE MANUAL
COMPACT COMPONENT SYSTEM
STANDBY/ON
1
2
3
ACTIVE BASS
SLEEP
EX. LEVEL
4
6
5
SOUND
AUX
MODE
7
8
9
FM MODE
10
+10
FADE
FM/AM
TAPE
TAPE A/B
MUTING
CD
DISC
SKIP
+
VOLUME
VOLUME
–
RM–SMXK50A REMOTE CONTROL
SP-MXK50
Contents
Safety Precautions
Importance administering
point on the safety
Preventing static electricity
Disassembly method
Wiring connection
Adjustment method
MX-K60
MX-K50
STANDBY
STANDBY/ON
3
CD
MX-K50
CLOCK
/TIMER
DISPLAY
ACTIVE BASS EXTENSION
FM
CD
AUX
TAPE
/AM
TUNING
TAPE A
TAPE B
PHONES
REPEAT
PROGRAM
RANDOM
REC START
CD REC
/STOP
START
DUBBING
C O M P U
P L A Y
C O N T R O L
FULL - LOGIC CONTROL
CD SYNCHRO RECORDING
CA-MXK50
Model
MX-K60
MX-K50
1-2
Flow of functional operation
1-3
Maintenance of laser pickup
1-4
Replacement of laser pickup
1-5
Trouble shooting
1-17
Description of major ICs
1-18
COPYRIGHT
2002 VICTOR COMPANY OF JAPAN, LTD.
DISC CHANGE
CD-R/RW PLAYBACK
SOUND
MODE
ACTIVE BASS
EX. LEVEL
SP-MXK50
Color
Black
Silver
until TOC read
MX-K60/MX-K50
MX-K60
Area suffix
C ---------------- Canada
MX-K50
Area suffix
J ------------------- U.S.A.
C ---------------- Canada
1-22
1-23
1-23
1-24
1-27~39
No.21069
Mar. 2002
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Summary of Contents for JVC MX-K60
- Page 1 MX-K60/MX-K50 SERVICE MANUAL COMPACT COMPONENT SYSTEM MX-K60 Area suffix MX-K60 C ---------------- Canada MX-K50 MX-K50 Area suffix J ------------------- U.S.A. C ---------------- Canada DISC CHANGE STANDBY STANDBY/ON CD-R/RW PLAYBACK MX-K50 SOUND MODE STANDBY/ON CLOCK /TIMER ACTIVE BASS DISPLAY SLEEP EX. LEVEL...
- Page 2 MX-K60/MX-K50 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-K60/MX-K50 Importance administering point on the safety 4A 125V RFS5 4A 125V RFS6 6.3A 125V RFS7 5A 125V RFS2 6.3A 125V RFS8 Fuse board (Forward side) Power supply board (Forward side) Caution: For continued protection against risk of fire, replace only with same type 5A/125V for RFS2, 4A/125V for RFS5 and RFS6, 6.3A/125V for RFS7 and RFS8.
- Page 4 MX-K60/MX-K50 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-K60/MX-K50 Metal cover Disassembly method Removing the metal cover (See Fig.1) Remove the three screws A attaching the metal cover on the back of the body. Remove the six screws B attaching the metal cover on the both sides of the body.
- Page 6 MX-K60/MX-K50 CW105 CD servo board Rear panel CD changer unit RCW6 Fig.6 Front panel assembly CD changer unit Main board Fig.5 (both sides) Rear panel Fig.7 Removing the front panel assembly FCW3 Front panel Main board JCW2 (See Fig.8 to 10)
- Page 7 MX-K60/MX-K50 Joint2 (Bottom side) Removing the heat sink & amp. board (See Fig.8, 11 and 12) Prior to performing the following procedure, remove the metal cover and the CD changer unit. Fig.10 Disconnect the card wire from the connector ACW1...
- Page 8 MX-K60/MX-K50 Removing the main board (See Fig. 14) FCW3 JCW2 Prior to performing the following procedure, remove JCW1 the metal cover, CD changer unit and rear panel. Main board HCW3 Disconnect the card wire from the connector FCW3 Fuse board and the harness from the connector JCW1, JCW2 and HCW3 on the main board.
- Page 9 MX-K60/MX-K50 Front panel assembly (inner side) <Front panel assembly> Power / CD switch board Prior to performing the following procedure, remove the metal cover, the CD changer unit and the front panel assembly. UCW1 FL display & Removing the power / CD switch board...
- Page 10 MX-K60/MX-K50 CD changer uint (reverse side) <CD changer unit> Prior to performing the following procedure, remove the CD changer unit. CD servo board Removing the CD tray (See Fig.1 to 3) CW103 Turn the black loading pulley gear on the under side of the CD changer unit in the direction of the arrow and draw the CD tray toward the front until it stops.
- Page 11 MX-K60/MX-K50 Removing the sensor board / the turn table motor assembly (See Fig.6 to 8) Prior to performing the following procedure, remove the CD tray. Remove the screw A attaching the sensor board and release the two tabs b attaching the sensor board on the under side of the CD tray.
- Page 12 MX-K60/MX-K50 Removing the belt, the CD servo board and the switch board (See Fig.9 and 10) Belt Prior to performing the following procedure, remove the CD tray. Detach the belt from the pulley on the upper side of the CD changer unit (Do not stain the belt with grease).
- Page 13 MX-K60/MX-K50 Removing the CD mechanism holder assembly (mechanism included) Motor connecter (See Fig.11 to 14) Disconnect the harness from connector on the CD mechanism board in the CD mechanism assembly on the under side of the CD changer unit. Disconnect the card wire from the pickup unit connector.
- Page 14 MX-K60/MX-K50 <CD mechanism section> Shutter Shaft Pickup unit Removing the CD mechanism holder from the CD • chager unit. (Refer to "Removing the CD mechanism holder assembly" ) Removing the pickup unit See Fig.1) 1. Removing the cut washer on the feed gear sleeve and pull out the feed gear.
- Page 15 MX-K60/MX-K50 R/P Head <Cassette mechanism section> Removing the record/playback mechanism. Removing the R/P head. 1. Remove the screw A on the right side of the R/P head.(Fig.1, Fig.2) 2. Remove the screw B on the left side of the R/P head.(Fig.1, Fig.2) Remove the erase head.
- Page 16 MX-K60/MX-K50 Motor Mecha. terminal board Removing the motor. 1. Remove the two screws D fixing the motor. Be careful to grease's splash when the drive belt comes off.(Fig.5, Fig.6) 2. Unsolder the motor terminal.(Fig.5) Removing the mechanism board. Unsolder the four parts a on the solenoid...
- Page 17 MX-K60/MX-K50 Wiring connection Color codes are shown below. Brown Orange Yellow Green Blue Violet Gray White Black 1-17...
- Page 18 MX-K60/MX-K50 Adjustment method 1. Tuner * Adjustment Location of Tuner PCB AM(MW) RF AM(MW) OSC ITEAM Adjustment Adjustment Received FREQ. 603 KHz 530~1710 KHz Adjustment point Maximum 1~7.0 0.5V Output Output(Fig.1) MAIN TESTER Fig.1 OSC Voltage 1-18...
- Page 19 MX-K60/MX-K50 FM THD Adjustment SSG FREQ. 98 MHz Adjustment Output Antenna point FM DETECTOR COIL Terminal (FM DET) Oscilloscope FM S.S.G Input 60 dB Output Speaker Minumum Distortion (0.4% below) Terminal output Input (Fig.2) Distortion Meter Fig.2 IF CENTER and THD Adjustment FM Search Level Adjustment SSG FREQ.
- Page 20 MX-K60/MX-K50 2. Cassette Deck To adjust tape speed Notes Cassette Deck Frequency Counter 1) Measuring tape: i) VT-712/MTT-111(or equivalent) (Tapes recorded with 3kHz) SPK OUT ii) AC-225/MTT-5512(or equivalent) output Fig.1 2) Connect the cassette deck to the frequency counter as in fig.1.
- Page 21 MX-K60/MX-K50 2. Adjust Deck 2 Play Level/REC BIAS Pre-Setup Step Item Pre-Setup To Adjust Standard Remark Condition After putting VT-703 AZIMUTH SPK OUT Turn the control Max output After into Deck 2 (VTVM is screw to as and same phase...
- Page 22 MX-K60/MX-K50 Flow of functional operation until TOC read Check Point Play Key RESET a CD LSI Power ON Confirm that the voltage at the pin17 of KB9226(IC101) is "L" "H". Confirm that the voltage at the pin33 LIMIT SW ON of KB9226(IC101) is "H"...
- Page 23 MX-K60/MX-K50 Maintenance of laser pickup (1) Cleaning the pick up lens (2) Life of the laser diode Before you replace the pick up, please try to When the life of the laser diode has expired, clean the lens with a alcohol soaked cotton the following symptoms will appear.
- Page 24 MX-K60/MX-K50 Troubleshooting 1. Amplifier Power malfunction No output ,5,6,7 5,6,7 1-24...
- Page 25 MX-K60/MX-K50 2.Tuner malfunction (FM/AM) 3.Tape HA12235F 3,4,27,28 HA12235F JIC1(HA12235F) PIN5,26 JC63L,JC63R,JR65L,JR65R 1-25...
- Page 26 MX-K60/MX-K50 4.CD 1-26...
- Page 27 MX-K60/MX-K50 Description of major ICs KA3082 (IC401, IC402) : DC motor driver 1.Pin layout DRIVER OUT PRE DRIVER LOGIC SWITCH 2.Pin function Pin No. Symbol Function Ground Output 1 Phase compensation Motor speed control VCTL Input 1 VIN1 VIN2 Input 2...
- Page 28 MX-K60/MX-K50 5L9290 (IC201) : Digital signal processor for CDP 1. Pin layout VSSA_PLL BCKO VCO1LF LRCKO VSSD_PLL SADTO VDDD_PLL DATX VDDD1_5V C2PO S5L9290X JITB DSP+DAC XOUT SBCK 48-LQFP-0707 VSSD1_5V VDDD3-5V EFMI VSSD2-3V LOCK VDDD2-3V SMEF MUTE SMON SQDT 2. Block diagram...
- Page 29 MX-K60/MX-K50 3. Pin function Symbol Function VSSA_PLL Analog Ground for DPLL VCO1LF Pump out for VCO1 VSSD_PLL Digital Ground Separated Bulk Bias for DPLL VDDD_PLL Digital Power Separated Bulk Bias for DPLL (3V Power) VDDD1-5V Digital Power (5V Power, I/O PAD) X'tal oscillator input (16.9344MHz)
- Page 30 MX-K60/MX-K50 KB9226 (IC101) : RF amp. & servo signal processor 1. Pin layout PDAC PDBD LOCK WDCK S1L9226X CLVI RESET DCCI DCCO MDATA VREF ISTAT 2. Block diagram Center Tracking Error RF & Focus RF AGC & EQ Voltage (RW)
- Page 31 MX-K60/MX-K50 3. Pin function Pin No. Symbol Function RF summing amp. inverting input RF summing amp. output RFO DC eliminating input(use by MIRROR, FOK ,AGC & EQ terminal) RF equalizer output EFMI EFM slice input. (input impedance 47K) Main power supply...
- Page 32 MX-K60/MX-K50 LC72131(IC02) : PLL frequency synthesizer for electron alignment 1. Pin layout 2. Block diagram XOUT Phase Reference Detector Driver AOUT Charge Pump Swallow Counter FMIN 1/16,1/17 4bits Unlock AMIN Detector IFIN 12bits Programmable Divider Universal Data Shift Register & Latch...
- Page 33 MX-K60/MX-K50 3.Pin function (2/2) Symbol Pin No. Type Functions Circut confguration Used as the synchronization clock when serial data is input Clock to the LC72131 (DI ), or when serial data is output (DO). Inputs serial data sent from the controller to the LC72131M.
- Page 34 MX-K60/MX-K50 HA12235 (JIC1) : Audio signal processor 1. Block diagram REC OUT(L) REC OUT(R) ALC(R) ALC(L) REC IN(L) REC IN(R) PB OUT(L) PB OUT(R) 0.1u 0.1u TAI(L) TAI(R) EQOUT(L) EQOUT(R) PB-EQ(L) PB-EQ(R) PB-NF2(L) PB-NF2(R) 2. Pin function Pin No. Symbol Function Pin No.
- Page 35 MX-K60/MX-K50 M66010 (UIC2) : I/O control 1.Pin layout 2.Block diagram Shift register 1 SERIAL DATA OUTPUT D24 D23 D22 D3 D2 D1 CLOCK INPUT SET INPUT CHIP SELECT Q24 Q23 Q22 Q3 Q2 Q1 PARALLEL INPUT Parallel output latch DATA I/O...
- Page 36 MX-K60/MX-K50 TDA7442D (FIC1) : Audio processor 1.Pin layout R_IN3 R_IN4 R_IN2 LOUT R_IN1 ROUT L_IN1 AGND L_IN2 L_IN3 CREF L_IN4 MUXOUTL IN(L) DIG-GND MUXOUT(R) TREBLE(R) IN(R) TREBLE(L) BIN(R) BOUT(R) BIN(L) BOUT(L) 2.Block diagram 5.6K 5.6nF 100nF 100nF 100nF 2.2 F...
- Page 37 MX-K60/MX-K50 L4959 (RIC1) : Voltage regulator 1.Pin layout OUT 12V(a) OUT 8.6V EN 8.6V EN 12V(a) EN 12V(b) N.C. OUT 5.6V OUT 12V(b) TAB CONNECTED TO PIN 6 D97AU716A 2.Block diagram 2/10 5.6V, 250mA OUT 5.6V REGULATOR 8.6V, 600mA OUT 8.6V...
- Page 38 MX-K60/MX-K50 KA9258D (IC301) : 4-ch Motor driver 1.Block diagram 28 27 26 25 24 23 22 21 20 19 18 17 16 15 REGULATOR T • S • D MUTE 10 11 12 13 14 LA1837 (IC01) : FM IF/DET AM RF/IF/DET 1.Block diagram...
- Page 39 MX-K60/MX-K50 LC86P6548 (UIC1) : Microcontroller 1.Pin layout S19/PC3 S48/PG0 S18/PC2 S49/PG1 S17/PC1 S50/PG2 S51/PG3 S16/PC0 VDD3 S15/T15 S14/T14 S13/T13 S12/T12 VSS2 S11/T11 VDD2 S10/T10 S9/T9 S8/T8 S7/T7 P10/SO0 S6/T6 S5/T5 P11/SI0/SB0 S4/T4 P12/SCK0 S3/T3 P13/SO1 P14/SI1/SB1 S2/T2 S1/T1 P15/SCK1 2.Block diagram...
- Page 40 MX-K60/MX-K50 VICTOR COMPANY OF JAPAN, LIMITED AUDIO & COMMUNICATION BUSINESS DIVISION PERSONAL & MOBILE NETWORK BUSINESS UNIT. 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.21069) 200203...