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JVC SP-UXJ50 Service Manual
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JVC SP-UXJ50 Service Manual

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SERVICE MANUAL
MICRO COMPONENT SYSTEM
03
2003
22032
RM -SUXJ50R REMOTE CONTROL
1
Important Safety Precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
2
Disassembly method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-6
3
Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19
4
Description of major ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-25
UX-J50
SP-UXJ50
CA-UXJ50
TABLE OF CONTENTS
COPYRIGHT © 2003 VICTOR COMPANY OF JAPAN, LTD.
SP-UXJ50
Area Suffix
B -------------------------- U.K.
E ------- Continental Europe
EN --------- Northern Europe
UX-J50
No.22032
2003/03

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  • Page 1 UX-J50 SERVICE MANUAL MICRO COMPONENT SYSTEM 22032 2003 UX-J50 RM -SUXJ50R REMOTE CONTROL SP-UXJ50 CA-UXJ50 SP-UXJ50 Area Suffix B -------------------------- U.K. E ------- Continental Europe EN --------- Northern Europe TABLE OF CONTENTS Important Safety Precautions ............1-2 Disassembly method .
  • Page 2 UX-J50 SECTION 1 Important Safety Precautions 1.1 Safety Precautions (1) This design of this product contains special hardware and exposed metal part and a known good earth ground. many circuits and components specially for safety purposes. Measure the AC voltage across the resistor with the AC For continued protection, no changes should be made to the voltmeter.
  • Page 3 UX-J50 1.5 Safety Precautions (U.K only) (1) This design of this product contains special hardware and many circuits and components specially for safety purposes. For con- tinued protection, no changes should be made to the original design unless authorized in writing by the manufacturer. Replace- ment parts must be identical to those used in the original circuits.
  • Page 4 UX-J50 1.6 Preventing 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. 1.6.1 Grounding to prevent damage by static electricity Static electricity in the work area can destroy the optical pickup (laser diode) in devices such as CD players.
  • Page 5 UX-J50 1.9 Important for laser products (1) CLASS 1 LASER PRODUCT (5) CAUTION : If safety switches malfunction, the laser is able (2) DANGER : Invisible laser radiation when open and inter to function. lock failed or defeated. Avoid direct exposure to beam. (6) CAUTION : Use of controls, adjustments or performance of (3) CAUTION : There are no serviceable parts inside the procedures other than those specified herein may result in...
  • Page 6 UX-J50 SECTION 2 Disassembly method 2.1 Main body 2.1.1 Removing the metal cover (See Fig.1~3) (1) Remove the six screws A on the back of the main body. (2) Remove the two screws B on each side and remove the metal cover in the direction of the arrow.
  • Page 7 UX-J50 2.1.2 Removing the rear cover (See Fig.4) (1) Remove the two screws C attaching the rear cover. Rear cover Fig.4 2.1.3 Removing the rear panel / fan assembly (See Fig.5,6) • Prior to performing the following procedure, remove the metal cover and the rear cover.
  • Page 8 UX-J50 2.1.4 Removing the tuner board (See Fig.7) • Prior to performing the following procedure, remove the metal cover. (1) Disconnect the card wire from the connector CN1 on the tuner board. (2) Remove the two screws F on the rear side and the screw G in the side.
  • Page 9 UX-J50 2.1.6 Removing the main board / the heat sink board / the Main board speaker jack board CN932 (See Fig.9~11) CN931 CN930 CN901 • Prior to performing the following procedure, remove the metal CN900 CN913 cover, the rear cover, the rear panel, the tuner board and the CD-R/RW mechanism assembly.
  • Page 10 UX-J50 2.1.7 Removing the power transformer assembly (See Fig.12) • Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, the CD-R/RW mecha- nism assembly and the main board. (1) Disconnect the power cord from the connector J1000 on the power transformer assembly.
  • Page 11 UX-J50 2.1.9 Removing the phones board (See Fig.15) • Prior to performing procedure, remove the metal cover and the front panel assembly. (1) Disconnect the flat wire from the connector CN913 on the main board. Mian board CN913 Phones board Fig.15 2.1.10 Removing the cassette mechanism assembly (See Fig.16)
  • Page 12 UX-J50 2.1.11 Removing the switch board LCD board assembly (See Fig.17,18) • Prior to performing the following procedure, remove the metal cover and the front panel assembly. (1) Remove the four screws M attaching the switch board. (2) Move the switch board in the direction of the arrow to dis- connect the wire from the connector CN762 and the card wire from the connector CN761.
  • Page 13 UX-J50 2.1.13 Removing the control panel assembly (See Fig.19,20) • Prior to performing the following procedure, remove the metal cover, the front assembly, the switch board and the LCD board assembly. (1) Remove the three screws O attaching the control panel as- sembly.
  • Page 14 UX-J50 2.1.14 Remiving the control board Control panel assembly (See Fig.21,22) • Prior to performing the following procedure, remove the metal cover, the front panel assembly, the switch board, the LCD board assembly and the control panel assembly. (1) Pull out the volume knob. (2) Remove the six screws P attaching the control board.
  • Page 15 UX-J50 2.2 Cassette mechanism assembly 2.2.1 Removing the Play/Record & Clear head Cassette mechanism assembly Fly wheelR (See Fig.1~3) (1) While moving the trigger arm on the right side of the head mount in the direction of the arrow, turn the flywheel R counterclockwise until the head mount comes ahead and clicks.
  • Page 16 UX-J50 2.2.2 Removing the head amplifier & mechanism control board (See Fig.4) (1) Turn over the cassette mechanism assembly and remove Main motor assembly the three screws A attaching the head amplifier & mecha- nism control board. Capstan belt (2) Disconnect the flexible wire from connector CN31 on the head amplifier &...
  • Page 17 UX-J50 2.2.4 Removing the flywheel (See Fig.8, 9) • Prior to performing the following procedure, remove the head amplifier & mechanism control board and the main motor as- sembly. (1) From the front side of the cassette mechanism, remove the slit washers attaching the capstan shaft L and R.
  • Page 18 UX-J50 2.2.6 Reattaching the Play/ Record & Clear head (See Fig.11~13) (1) Reattaching the head mount assembly. a) Change front of the direction cover of the head mount assembly to the left (Turn the head forward). b) Fit the bosses O', P', Q', U' and V' on the head mount assembly to the holes P and V, the slots O, U and Q of the mechanism sub assembly (See Fig.11 to 13).
  • Page 19 UX-J50 SECTION 3 Adjustment 3.1 Adjustment method Tuner section Measurement Instruments Required for Adjustment FM tuning range: 87.5MHz~108.00MHz AM tuning range: 522kHz~1,629kHz 1. Low frequency oscillator This oscillator should have a capacity to output Voltage applied to tuner +B : DC5.7V 0dBs to 600 at an oscillation frequency of VT : DC 12V...
  • Page 20 UX-J50 3.2 Cassette mechanism adjustment Head azinuth Head azinuth adjustment screw adjustment screw (Forward side) (Reverse side) CN31 Head azinuth Head azinuth R/P head, Erase head adjustment screw adjustment screw (Forward side) (Reverse side) Mecha control board VR37 R371 FW100 Motor speed CN33 VR37...
  • Page 21 UX-J50 3.2.1 Mechanism section Adjustment Item Condition Measurement method Ref.value position Only adjust Head Test tape 1.Playback the test tape VT703L (8kHz). Maximum at changed azimuth : VT703L (8kHz) 2.Adjust to maximum output level by azimuth output head Output terminal adjustment screw for forward side and reverse : Speaker out side.
  • Page 22 UX-J50 3.2.2 Electrical adjustment Adjustment Item Condition Measurement method Ref.value position VR31 AC-225 Recording Forward or Reverse 1.Set the test tape(AC-514 TYPE :4.20 A BIAS Test tape AC-225 TYPE ), then make REC/PAUSE AC-514 adjustment :AC-514 TYPE condition. :4.0 A :AC-225 TYPE 2.Connect 100 to recording head by series,...
  • Page 23 UX-J50 3.3 Flow of functional operation until TOC read (CD) Check Point Slider turns REST Power Key Power ON Check that the voltage at the pin 5 SW ON. of CN801 is 0V? Automatic tuning of TE offset Check that the voltage at the Laser ON pin2 of IC601 is 4.4V? Detection of disc...
  • Page 24 UX-J50 3.4 Maintenance of laser pickup (CD) 3.5 Replacement of laser pickup (CD) (1) Cleaning the pick up lens Before you replace the pick up, please try to clean the lens Turn off the power switch and, disconnect the with a alcohol soaked cotton swab. power cord from the ac outlet.
  • Page 25 UX-J50 SECTION 4 Description of major ICs 4.1 AN22000A-W (IC601) : RF & SERVO AMP • Terminal layout • Pin function Symbol I/O Function I APC Amp. input terminal O APC Amp. output terminal - Power supply terminal I RF adder Amp. inverting input terminal RFOUT O RF adder Amp.
  • Page 26 UX-J50 4.2 HA12238F (IC32) : R/P Equalizer • Pin layout TEST PB-NF1(L) (Open for nomal use) TEST 2 Iraf MUTE PBIN(l) ALC DET Return SW REC Return REC MUTE OFF/ON Return SW PBIN(R) MUTO ON/OFF REC RETURN ON/OFF MUTE TEST 3 TEST 4 PB-NF1(R) ALC ON/OFF...
  • Page 27 UX-J50 • Pin function Pin No. Symbol Function PB-NF2(R) PB EQ feed back PB-EQ(R) NAB output EQOUT(R) EQ output TAI(R) Tape input PBOUT(R) PB output NC pin REC IN(R) REC-EQ input ALC(R) ALC(R) signal out put NC pin REC OUT(R) REC output ALC ON/OFF Mode control input...
  • Page 28 UX-J50 4.3 GP1UM261XK (IC750) : Receiver • Pin layout Vout • Block diagram Limiter B.P.F. Integrator Demodulator Comparator GND Vdd Vout 1-28 (No.22032)
  • Page 29 UX-J50 4.4 KIA78S06P-T (IC932) : Regulator • Pin layout 1 2 3 • Block diagram 3 INPUT 1 OUTPUT 2 COMMON 4.5 LB1641 (IC402) : DC Motor driver • Pin layout • Truth table Input Output Mode OUT1 OUT1 OUT2 Brake CLOCKWISE VCC1...
  • Page 30 UX-J50 4.6 LA1838 (IC1): FM AM IF AMP&detector, FM MPX Decoder • Block Diagram DECODER RF.AMP ANIT-BIRDIE MUTE BUFF STEREO P-DET AM IF PILOT 384KHz COMP S-METER AM/FM S-CLRVE S-METER IF-BUFF TUNING STEREO DRIVE DRIVE FM IF • Pin Function Pin No.
  • Page 31 UX-J50 4.7 LA6541-X (IC801) : Servo driver • Pin layout & Block diagram Vref Vin4 Vin3 Level B T L B T L Level RESET shift driver driver shift Level B T L B T L Level Regulator shift driver driver shift Mute...
  • Page 32 UX-J50 4.8 LC72136N (IC2) : PLL frequency synthesizer • Pin layout FM/AM LPFOUT LPFIN CLOCK FM/ST/VCO FMIN AM/FM AMIN IFCONT SDIN IFIN • 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 33 UX-J50 4.9 LC72723(IC3): RDS demodulation • Pin layout VREF RDS-ID/READY MPXIN RDCL Vdda RDDA Vssa FLOUT MODE Vddd Vssd XOUT • Block Diagram FLOUT VREF Vdda CLOCK Vddd RECOVERY (1187.5Hz) REFERENCE (57kHz) VOLTAGE Vssa Vssd VREF 57kHz MPXIN (SCF) ANTI ALIASING DATA SMOOTHING RDDA...
  • Page 34 UX-J50 4.10 LC75345M-X (IC901) : E.volume • Pin layout 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21 20 19 • Block diagram LINP LINM LVref LOPOUT CONTROL CIRCUIT LOGIC Vref INTERFACE CIRCUIT CONTROL CIRCUIT RVref...
  • Page 35 UX-J50 • Pin function Pin No. Symbol Function Serial data and clock input pin for control. Chip enable pin. Ground pin. LOPOUT Output pin of general-purpose operation amplifier. LINM Non-inverted input pin of general-purpuse operation amplifier. LINP Non-inverted input pin of general-purpuse operation amplifier. LOUT ATT + equalizer output pin.
  • Page 36 UX-J50 4.11 MN101C57DFB (IC931) : System micon • Pin Layout • Pin function Pin No. Symbol Function VLC1~VLC3 LCD BIAS VOLTAGE CD command ready signal MDATA CD data MCLK CD data clock _XRST CD reset STAT CD status input port GROUND OSC1 MAIN OSC...
  • Page 37 UX-J50 Pin No. Symbol Function DOOR_RST REST/CLOSE switch detect port SAFETY0 Irregular voltage detection 0 TAPE1 Tape Switch 0 TAPE0 Tape Switch 1 SAFETY1 Irregular voltage detection 1 STTA Tape IC Strobe BCTL Switched 5V control('H'=5Víoff) CDSAFETY CD safety voltage detect port VREF- GROUND REEL...
  • Page 38 UX-J50 4.12 MN662748RPMFA (IC701) : Digital servo & Digital signal processer • Pin layout 20 ~ 41 ~ • Block diagram AVSS1 LRCKIN(MSEL) 8TIMES AVDD1 BCLK(SSEL) DIGITAL OVER SAMPUNC OUTR SRDATAIN DEEMPHSIS DIGITAL FILTER 1BIT (PSEL) LOGIC IOSEL CLVS BLKCK OUTL CLDCK SBCK...
  • Page 39 UX-J50 • Pin function Symbol Function Symbol Function LDON Laser ON signal output (H:on) BCLK Not used Tracking error shunt signal output LRCK Not used (H:shunt) SRDATA Not used PLAY Not used DVDD1 Power supply (Digital) WVEL Not used DVSS1 Connected to GND RF signal input Digital audio interface output...
  • Page 40 UX-J50 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.22032) Printed in Japan 200303WPC...

  • Page 41: Table Of Contents

    UX-J50 PARTS LIST [ UX-J50 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix B ------------------------------- U.K. E ----------- Continental Europe EN ------------ Northern Europe - Contents - 3- 3 Exploded view of general assembly and parts list (Block No.M1) 3- 6 Speaker assembly and parts list (Block No.M2) 3- 7...
  • Page 42 UX-J50 < M E M O >...
  • Page 43 UX-J50 Exploded view of general assembly and parts list Block No. Tuner board...
  • Page 44 Parts name Q'ty Area Parts number Parts name Q'ty Area GV10123-001A FRONT PANEL QYSBSF3008Z SCREW 1 CD TRAY STOPPER GV40077-002A JVC BADGE QYSBSF3008Z SCREW 2 CD BRD/LOAD.ASS GV40367-001A REMOTE LENS QYSDSF2608Z SCREW 1 TUNER/C.BASE AS GV40366-001A STANDBY LENS GV40122-003A SPACER...
  • Page 45 UX-J50 Parts list (General assembly) Block No. M1MM Item Description Parts number Parts name Q'ty Area QUQH12-1614BJ FLAT WIRE 1 FC651 QUQH12-1332BJ FLAT WIRE 1 FC 1 QUQH12-1922AJ FLAT WIRE 1 FC731 QUQH12-2317AJ FLAT WIRE 1 FC730 QUQH12-1316AJ FLAT WIRE 1 FC760 QUQH10-0910BJ FLAT WIRE...
  • Page 46 UX-J50 Speaker assembly and parts list Block No. (SP-UXJ50) Parts list (Speaker) Block No. M2MM Item Parts number Parts name Q'ty Description Area 993060400036 TWEETER ASSY 991061200061 WOOFER ASSY 135604141062 SCREW 151732601147 FRONT PANE 108650251048 DIAPHRAGM 138730251130 D.SIDE TAPE 147780121071...

  • Page 47: Cd Loading Base Assembly And Parts List (Block No.md)

    UX-J50 CD loading base assembly and parts list Block No. LOAD-JEM-2M Grease = G-474C = EBS0006-009B FIG A Apply grease to groove and support convex. FIG A Dimension gap for motor pulley...
  • Page 48 UX-J50 Parts list (CD loading mechanism) Block No. MDMM Item Description Parts number Parts name Q'ty Area VYH1238-001 LODING BASE MMN-6F1LB8K MOTOR QGF1201F3-05 CONNECTOR 1 CN505 QSW0472-001 SWITCH 1 S851 QYSPSPT2640Z MINI SCREW E75984-221SS C.D M.PULLEY BELT E75950-002 E75985-221SS C.D GEAR (1) E75986-221SS C.D GEAR (2) 1 PBT...

  • Page 49: Cassette Mechanism Assembly And Parts List (Block No.mp)

    UX-J50 Cassette mechanism assembly and parts list Block No. SLC-S302M Grease = EM-30L =UD-24 =LEN-320M =MOBIL-1 The lower side Switch board Head amplifier board...
  • Page 50 UX-J50 Parts list (Cassette mechanism) Block No. MPMM Item Description Parts number Parts name Q'ty Area VKS1165-00L CHASSIS B. ASSY VKS2274-002 REEL GEAR VKW5286-002 B.T. SPRING VKS5559-001 PLAY IDLE GEAR VKS5595-002 BLIND VKS5560-003 FR IDLE GEAR EARTH SPRING LV42013-001A SLC-PP3SVM HEAD MOUNT ASSY VKY3149-002 CASSETTE SP.

  • Page 51: Electrical Parts List (Block No.01~06)

    UX-J50 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area CN900 QGF1201C3-10 CONNECTOR C2508 QCBB1HK-331Y C CAPACITOR 330PF 10% 50V CN901 QGF1205C1-09 CONNECTOR C2509 QCBB1HK-331Y C CAPACITOR 330PF 10% 50V CN902 QGF1205F1-13...
  • Page 52 L7003 QQL231K-4R7Y INDUCTOR AVREF R2218 QRE141J-471Y C RESISTOR 470 5% 1/4W PP 3 QZW0038-001 WIRE CLAMP R2221 QRE141J-101Y C RESISTOR Q2209 2SC3576-JVC-T TRANSISTOR MAIN AHB R2222 QRE141J-222Y C RESISTOR Q2210 2SC3576-JVC-T TRANSISTOR MAIN AHB R2224 QRE141J-222Y C RESISTOR SDATA Q2211...
  • Page 53 UX-J50 Electrical parts list (Main board) Block No. 01 Item Parts number Parts name Remarks Area 2.2K 5% 1/4W R7112 QRE141J-222Y C RESISTOR R7113 QRE141J-103Y C RESISTOR 10K 5% 1/4W R7114 QRE141J-222Y C RESISTOR 2.2K 5% 1/4W R7115 QRE141J-103Y C RESISTOR 10K 5% 1/4W R7116 QRE141J-222Y...
  • Page 54 TRANSISTOR C7507 QDYB1CM-103Y C CAPACITOR Q4301 KTA1267/YG/-T TRANSISTOR C7510 QDYB1CM-103Y C CAPACITOR Q4302 KTC3199/GL/-T TRANSISTOR C7511 QDYB1CM-103Y C CAPACITOR Q4502 2SC3576-JVC-T TRANSISTOR C7520 QDYB1CM-103Y C CAPACITOR Q4503 2SC3576-JVC-T TRANSISTOR C7600 QDYB1CM-103Y C CAPACITOR Q4504 KRA102M-T D.TRANSISTOR DI731 QLD0261-001 LCD MODULE...
  • Page 55 UX-J50 Electrical parts list (Power board) Block No. 02 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area RY940 QSK0124-001 RELAY R7523 QRE141J-392Y C RESISTOR 3.9K 5% 1/4W R1001 QRE141J-332Y C RESISTOR 3.3K 5% 1/4W R7600 QRE141J-102Y C RESISTOR...
  • Page 56 UX-J50 Electrical parts list (CD amp. board) Block No. 03 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area C 601 NCB31CK-104X C CAPACITOR D 601 MA111-X DIODE D 602 MA111-X DIODE C 602 NCB31HK-222X C CAPACITOR D 831 DZ5.6BSB-T2...
  • Page 57 UX-J50 Electrical parts list (Tuner board) Block No. 04 Item Parts number Parts name Remarks Area Item Parts number Parts name Remarks Area NCB21HK-223X C CAPACITOR 1SS133-T2 SI DIODE NCB21HK-103X C CAPACITOR 1SS133-T2 SI DIODE EETC1CM-106ZJC E.CAPACITOR 1SS133-T2 SI DIODE NCB21HK-103X C CAPACITOR D 11...
  • Page 58 BIAS COIL L 303 QQL244K-100Z INDUCTOR Q 302 2SC2001/K/-T TRANSISTOR Q 305 2SC2001/K/-T TRANSISTOR Q 342 KRA111M-T D.TRANSISTOR Q 343 2SC3576-JVC-T TRANSISTOR Q 344 2SC3576-JVC-T TRANSISTOR Q 345 2SC3576-JVC-T TRANSISTOR Q 346 2SC3576-JVC-T TRANSISTOR Q 347 KRC107M-T D.TRANSISTOR Q 371...
  • Page 59 UX-J50 < M E M O > 3-19...

  • Page 60: Packing Materials And Accessories Parts List (Block No.m3,M5)

    UX-J50 Packing materials and accessories parts list Block No. Block No. A1~A7 3-20...

  • Page 61: Parts List

    UX-J50 Parts list (Packing) Block No. M3MM Item Parts number Parts name Q'ty Description Area GV20219-001A CARTON ASSY. GV10135-001A CUSHION (FRONT) 1 (UPPER SIDE) CUSHION (REAR) 1 (BOTTOM SIDE) GV10136-001A QPC05006515P POLY BAG QPC02503515P POLY BAG 1 FOR INST. 138763001072 MIRAMAT SHEET 138764601090 POLY BAG...

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