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JVC UX-S20EN Service Manual
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JVC UX-S20EN Service Manual

JVC UX-S20EN Service Manual

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SERVICE MANUAL
MICRO COMPONENT SYSTEM
7
MB538
2006
UX-S20EN,UX-S20EV
Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
SP-UXS20
Ths UX-S20 is derivative model for Dixon group.
TABLE OF CONTENTS
COPYRIGHT © 2006 Victor Company of Japan, Limited
CA-UXS20
SP-UXS20
No.MB538
2006/7

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Summary of Contents for JVC UX-S20EN

  • Page 1 SERVICE MANUAL MICRO COMPONENT SYSTEM MB538 2006 UX-S20EN,UX-S20EV SP-UXS20 CA-UXS20 SP-UXS20 Ths UX-S20 is derivative model for Dixon group. Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION 25 W per channel, min. RMS, driven into 4 Ω at 1 kHz with no more Amplifier Section Output Power than 10% total harmonic distortion. (IEC268-3) Audio input sensitivity/Impedance (at 1 kHz) AUX: 500 mV/50 kΩ 4 Ω - 16 Ω Speakers Impedance Tuner FM tuning range...
  • Page 3 SECTION 1 PRECAUTION Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
  • Page 4 Important for laser products 1.CLASS 1 LASER PRODUCT 5.CAUTION : If safety switches malfunction, the laser is able to function. 2.CAUTION : (For U.S.A.) Visible and/or invisible class II laser radiation 6.CAUTION : Use of controls, adjustments or performance of when open.
  • Page 5 SECTION 2 SPECIFIC SERVICE INSTRUCTIONS Difference point of UX-G4 and UX-S20 (1) Main body color (2) Main body RDS logo mark (3) RDS indication of remote control RDS SEARCH → PTY SEARCH RDS MODE→ PS/PTY/RT (4) Speaker saran net SECTION 3 DISASSEMBLY This service manual does not describe DISASSEMBLY.
  • Page 6 Victor Company of Japan, Limited Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB538) Printed in Japan...

  • Page 7: Table Of Contents

    SERVICE MANUAL MICRO COMPONENT SYSTEM MB371 2005 UX-G3,UX-G4 Area suffix B ------------------------------ U.K. E ---------- Continental Europe EN ----------- Northern Europe EV ------------- Eastern Europe SP-UXG4 CA-UXG4 SP-UXG4 SP-UXG3 CA-UXG3 SP-UXG3 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) TABLE OF CONTENTS PRECAUTIONS .
  • Page 8 SPECIFICATION 25 W per channel, min. RMS, driven into 4 Ω at 1 kHz with no more Amplifier Section Output Power than 10% total harmonic distortion. (IEC268-3) Audio input sensitivity/Impedance (at 1 kHz) AUX: 500 mV/50 kΩ 4 Ω - 16 Ω Speakers Impedance Tuner FM tuning range...

  • Page 9: Precautions

    SECTION 1 PRECAUTIONS Safety Precautions (1) This design of this product contains special hardware and voltmeter. many circuits and components specially for safety purpos- Move the resistor connection to each exposed metal es. For continued protection, no changes should be made part, particularly any exposed metal part having a return to the original design unless authorized in writing by the path to the chassis, and measure the AC voltage across...
  • Page 10 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 11: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB371)1-5...

  • Page 12: Disassembly

    SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the front panel assembly (See Fig.1 to 6) (1) From the back of the body, remove the two screws A, the two screws B and the two screws D attaching the front pan- CD mechanism assembly el assembly.
  • Page 13 CD mechanism assembly CD mechanism assembly Joint a Front panelh assembly Rear panel assembly Front panel assembly Fig.3 Front panel assembly Rear cover assembly Fig.5 CD mechanism assembly Front panel assembly Rear panel assembly Fig.4 Main board CN402 Rear cover assembly CON801 Fig.6 (No.MB371)1-7...
  • Page 14 3.1.2 Removing the main board (See Fig.7, 8) • Prior to performing the following procedure, remove the front panel assembly. Front panel assembly (1) Disconnect the wire from all connectors on the main board. CD mechanism assembly (2) Disconnect the wire from the two connectors on the cas- CN103 sette mechanism assembly.
  • Page 15 3.1.3 Removing the CD mechanism assembly (See Fig.9, 10) • Prior to performing the following procedure, remove the front panel assembly and the main board. CD door switch (1) Remove the three bands attaching the wire. Front panel assembly CD mechanism assembly (2) Disconnect the connector from the CD door switch.
  • Page 16 3.1.4 Removing the CD mechanism assembly (See Fig.11 to 13) • Prior to performing the following procedure, remove the front panel assembly, the main board and the CD mechanism as- CD mechanism board sembly. CN601 Caution: wire Before disconnecting the card wire from connector CN601 Cord wire the CD mechanism board and from CD pickup board, solder...
  • Page 17 3.1.5 Removing the CD mechanism (See Fig.14) • Prior to performing the following procedure, remove the front panel assembly, the main board, the CD mechanism assembly CD mechanism and the CD mechanism board. (1) Remove the four screws M attaching the CD mechanism. CD mechanism assembly Fig.14 3.1.6 Removing the headphone board/ AUX board...
  • Page 18 3.1.7 Remove the LCD board (See Fig.16, 17) • Prior to performing the following procedure, remove the front panel assembly, the main board and the CD mechanism as- Front panel assembly sembly. (1) From the front panel, pull out the volume knob and remove the nut and the washer.
  • Page 19 3.1.8 Removing the cassette mechanism assembly (See Fig.18, 19) • Prior to performing the following procedure, remove the front panel assembly and the main board. PUSH OPEN (1) Push 'PUSH OPEN' on the front panel to open the cassette door. (2) Remove the screw R attaching the bracket of the cassette mechanism assembly.
  • Page 20 3.1.9 Removing the heat sink/power board (See Fig.20 to 25) • Prior to performing the following procedure, remove the front panel assembly. Power unit section (1) Remove the four screws Y attaching the holder in the pow- er unit section. (2) Move the power unit section with the wire from the rear cov- er temporarily.
  • Page 21 Holder Heat sink Heat sink e Band e Band Power board Fig.22 Power board Fig.24 Heat sink Power board Heat sink Power board Joint f Holder Band Fig.23 Fig.25 (No.MB371)1-15...
  • Page 22 3.1.10 Removing the power transformer assembly (See Fig.26, 27) • Prior to performing the following procedure, remove the front panel assembly and the power unit section. Power trnsfomer assembly (1) Remove the four screws F' attaching the power transformer assembly. The bracket comes off at the bottom of the rear cover.

  • Page 23: Adjustment

    Headphone output : -10 dB (0.1V) 32 Ω Amplifier section • Reference output : Speaker output 0 dB (1 V) / 4 Ω Headphone output -10 dB (0.1 V) / 32 Ω CD section • Test disc : CTS-1000 (JVC) TCD-731R (A-BEX) TCD-712R (A-BEX) TCD-785 (A-BEX) (No.MB371)1-17...
  • Page 24 Cassette amplifier section Item Measuring condition Check and adjustment procedure Standard value Adjusting part Head azimuth Test tape : VT703 1.Plyback the test tape VT703. Output level : Head azimuth adjustment Signal output terminal : 2.Adjust the head azimuth adjusting screw within +/-2dB adjusting screw PHONES...
  • Page 25 Location of adjusting parts Cassette mechanism section CASSETTE MOTOR Tape speed adj. Main board assembly (AM RF) (AM IF) T203 TC201 (AM RF) R245 T204 (AM VT) (114 kHz) T201 (AM OSC) T360 (BIAS FREQUENCY) (No.MB371)1-19...

  • Page 26: Troubleshooting

    SECTION 5 TROUBLESHOOTING This service manual does not describe TROUBLESHOOTING. 1-20 (No.MB371)
  • Page 27 (No.MB371)1-21...
  • Page 28 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB371) Printed in Japan...
  • Page 29 SCHEMATIC DIAGRAMS MICRO COMPONENT SYSTEM UX-G3,UX-G4 CD-ROM No.SML200506 Area suffix B ------------------------------ U.K. E ---------- Continental Europe EN ----------- Northern Europe EV ------------- Eastern Europe SP-UXG4 CA-UXG4 SP-UXG4 SP-UXG3 CA-UXG3 SP-UXG3 Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Contents Wiring diagram Block diagram...
  • Page 30 In regard with component parts appearing on 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.
  • Page 31 Wiring diagrams P/N:20-41032-83 UX-G3 B Color codes are shown below - - - - - - BROWN BLUE - - - - - - VIOLET - - - - - - ORANGE GREY CN602 CN606 CN603 - - - - - - YELLOW WHITE - - -...
  • Page 32 P/N:20-41032-83 UX-G3 E, EN, EV Color codes are shown below - - - - - - BROWN BLUE - - - - - - VIOLET CN602 CN603 CN606 - - - - - - ORANGE GREY P/N:25-23050-82 - - - - - - P/N:11-20003-06 YELLOW...
  • Page 33 P/N:20-41032-83 UX-G4 B Color codes are shown below - - - - - - BROWN BLUE - - - - - - VIOLET - - - - - - ORANGE GREY CN602 CN606 CN603 - - - - - - YELLOW WHITE - - -...
  • Page 34 UX-G4 E, EN, EV P/N:20-41032-83 Color codes are shown below - - - - - - BROWN BLUE - - - - - - VIOLET - - - - - - ORANGE GREY CN602 CN606 CN603 - - - - - - YELLOW WHITE - - -...
  • Page 35 Block diagrams UX-G3 BACK LIGHT DISPLAY TAPE LOGIC TUNER DECK SOURCE PHONE PHONE SELECTOR AUX IN KEY BOARD REMOTE SENSOR POWER SPEAKER FOR TUNER FOR TAPE SRAM MAIN POWER RECTIFIER VOLTAGE SUPPLY REGULATOR CD RF PICKUP CD/MCU FOR MCU AC IN VOLTAGE FOR CD REGULATOR...
  • Page 36 UX-G4 BACK LIGHT TAPE LOGIC TUNER DECK PHONE SOURCE PHONE SELECTOR AUX IN KEY BOARD REMOTE SENSOR POWER SPEAKER FOR TUNER FOR TAPE SRAM MAIN POSWER VOLTAGE RECTIFIER SUPPLY REGULATOR CD DSP RF AMP PICKUP CD/MCU FOR MCU VOLTAGE AC IN FOR CD REGULATOR DRIVER...
  • Page 37 Standard schematic diagrams Power section Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
  • Page 38 Main section Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
  • Page 39 Display section Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
  • Page 40 CD section Parts are safety assurance parts. When replacing those parts make sure to use the specified one. 2-10...
  • Page 41 Voltage table IC101 IC102 IC201 IC202 IC301 IC401 IC402 IC602 IC603 IC606 IC607 IC702 IC801 IC701 9.2 V PIN1 2.3V 0.2V 2.5V 3.4V PIN1 PIN26 3.5 V PIN51 PIN76 Q101 11.3V Q403 5.6V 11.6V PIN2 2.5V 2.3V 1.5V 2.5V 2.4V 4.3V 22.5V PIN2...
  • Page 42 Printed circuit boards Main board Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Reverse side Forward side 2-12...
  • Page 43 CD board Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) (forward side) (reverse side) 2-13...
  • Page 44 Front board Trans board Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) (forward side) (forward side) (reverse side) (reverse side) 2-14...
  • Page 45 < M E M O >...
  • Page 46 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 (No.MB371SCH)
  • Page 47 PARTS LIST [ UX-G3 ] [ UX-G4 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix B ------------------------------- U.K. E ----------- Continental Europe EN ------------ Northern Europe EV -------------- Eastern Europe - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 6...
  • Page 48 Exploded view of general assembly and parts list Block No. 70 69 AC connect board F905 F903 85 46 a r d F902 F901 Power board Display board F904 Phone board LED board AUX board...
  • Page 49 70 69 E,EN,EV B version version AC connect board F905 a r d F901 Display board F904 LED board CD board AUX board The parts without symbol number are not service.
  • Page 50 General Assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local  OW66-00300-21 CD DOOR OW39-20003-05 METAL PLATE OW97-09019-80 P.C.MAGNET OW49-00300-12 STABILIZER RING OW55-07953-83 STABILIZER SANYO CD PICK UP OW55-00141-80 OW36-00003-80 EJECT SPRING OW16-10101-81 CD DOOR SWITCH OW36-00300-10 CD DOOR SPRING OW48-00300-16 CD TRAY...
  • Page 51  Symbol No. Part No. Part Name Description Local OW40-92608-11 SCREW M2.6 X 8(x12) OW40-83010-52 SCREW M3.0 X 10(x4) OW40-93012-01 SCREW M3 X 12(x6) OW40-93012-03 SCREW F3 X 12 WH/ST ZN OW40-83006-22 SCREW M3.0 X 6(x7) OW40-84012-01 SCREW M4.0 X 12(x4) OW40-93014-01 SCREW M3.0 X 14(x2)
  • Page 52 Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1] D102A 1N4148 GE DIODE OW02-04148-81  Symbol No. Part No. Part Name Description Local OW05-77102-10 C CAPACITOR Axial 1000pF OW05-77101-05 C CAPACITOR Axial 100pF IC101 TA2099 OW03-02099-00...
  • Page 53  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C161 OW05-73101-05 C CAPACITOR 100pF C325 OW06-75334-20 E CAPACITOR 0.33uF 50V C162 OW05-77474-82 C CAPACITOR 360pF 50V C326 OW06-75334-20 E CAPACITOR 0.33uF 50V C201 OW05-72152-10 M CAPACITOR...
  • Page 54  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R133 OW07-75563-06 C RESISTOR 56KΩ 1/16W R254 OW07-75823-06 C RESISTOR 82KΩ 1/16W R134 OW07-75183-06 C RESISTOR 18KΩ 1/16W R255 OW07-75750-06 C RESISTOR 75Ω...
  • Page 55  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R483 OW08-04344-73 FERRITE BEAD 700 / 100MHz TIEIE1 OW31-50040-80 UL WIRE 40mm BLK R484 OW07-75333-06 C RESISTOR 33 KΩ 1/16W TIEIE4 OW31-50040-80 UL WIRE 40mm BLK R485...
  • Page 56  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C903 OW05-77223-82 C CAPACITOR Axial 0.022uF D704 ELT-3142D OW02-30022-82 C904 OW05-77223-82 C CAPACITOR Axial 0.022uF C905 OW05-77223-82 C CAPACITOR Axial 0.022uF C701 OW05-73102-00 C CAPACITOR 1000pF...
  • Page 57  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R752 OW07-75103-06 C RESISTOR 10KΩ 1/16W  Z702 8.2V0.5W Z DIODE OW02-50082-80 R753 OW07-75471-06 C RESISTOR 470Ω 1/16W R754 OW07-75912-06 C RESISTOR 9.1KΩ...
  • Page 58  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C660 OW05-73473-00 C CAPACITOR 0.047uF R642 OW07-75472-06 C RESISTOR 4.7KΩ 1/16W C661 OW05-73104-00 C CAPACITOR 0.1uF R643 OW07-75472-06 C RESISTOR 4.7KΩ 1/16W C662 OW05-77104-82 C CAPACITOR...
  • Page 59  Symbol No. Part No. Part Name Description Local CN603 OW20-21030-80 CONNECTOR CN604 OW20-41032-87 CONNECTOR WIRE 3PIN CN605 OW20-32032-80 CONNECTOR WIRE 3PIN CN606 OW20-21100-80 CONNECTOR J601 OW07-75001-05F C RESISTOR 0Ω 1/8W J605 OW07-75000-06F C RESISTOR 0Ω 1/16W J606 OW07-75001-05F C RESISTOR 0Ω...
  • Page 60 Packing materials and accessories parts list Block No. No additional / supplemental order of WARRANTY CARDs are available. A1 A7 A1 A7 A4 A8 B version E,EN,EV version The parts without symbol number are not service. 3-14...
  • Page 61 Packing and Accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local  OW88-20003-05 INST BOOK ENG LVT1364-002B UXG3_B,UXG4_B OW88-20003-02 INST BOOK GER FRE DUT LVT1364-003B UXG3_E,UXG4_E OW88-20003-06 INST BOOK SWE FIN DAN GER FRE SPA ITA LVT1364-004B UXG3_EN,UXG4_EN OW88-20003-07 INST BOOK CZE POL HUN RUS lvt1364-005a...

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