JVC UX-HB4 Service Manual
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JVC UX-HB4 Service Manual

JVC UX-HB4 Service Manual

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SERVICE MANUAL
MICRO COMPONENT SYSTEM
10
2004
MB330
1
PRECAUTION. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3
2
SPECIFIC SERVICE INSTRUCTIONS . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7
3
DISASSEMBLY . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8
4
ADJUSTMENT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-20
5
TROUBLESHOOTING . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-23
UX-HB4
SP-UXHB4

TABLE OF CONTENTS

COPYRIGHT © 2004 Victor Company of Japan, Limited
CA-UXHB4
Area suffix
B ------------------------------ U.K.
SP-UXHB4
No.MB330
2004/10

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  • Page 1: Table Of Contents

    SERVICE MANUAL MICRO COMPONENT SYSTEM MB330 2004 UX-HB4 Area suffix B ------------------------------ U.K. SP-UXHB4 CA-UXHB4 SP-UXHB4 TABLE OF CONTENTS PRECAUTION............... . . 1-3 SPECIFIC SERVICE INSTRUCTIONS .
  • Page 2 SPECIFICATION 15 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 DAB tuning range...

  • Page 3: Precaution

    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 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 5 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 laser products.

  • Page 6: Important For Laser Products

    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. procedures other than those specified here in may result in 3.CAUTION : There are no serviceable parts inside the hazardous radiation exposure.

  • Page 7: Specific Service Instructions

    SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB330)1-7...

  • Page 8: Disassembly

    SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the front panel assembly (See Fig.1 ~ 6) (1) Disconnect the antenna cord on the back of the body. (2) Remove the two screws A, the two screws B and the two CD mechanism assembly screws D on the back of the body respectively.
  • Page 9 Front panel assembly CD mechanism assembly Front panel assembly FM-ANT Rear panel assembly Fig.4 CD mechanism assembly Joint a Main board CN402 CN801 Rear cover assembly Fig.6 Front panel assembly Rear cover assembly Fig.5 (No.MB330)1-9...
  • Page 10 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 11 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 mechanism assembly (1) Release the four bands setting the wire. Front panel assembly (2) Disconnect the wire from connector CN607 on the CD mechanism board respectively.
  • Page 12 3.1.4 Removing the CD mechanism assembly (See Fig.11 ~ 13) • Prior to performing the following procedure, remove the front panel assembly, the main board and the CD mechanism as- CD mechanism board sembly. CAUTION: Before disconnecting the card wire from connector CN608 the CD mechanism board and from CD pickup board, solder the short-circuit point on the CD pickup board.
  • Page 13 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 K attaching the CD mechanism. CD mechanism assembly Fig.14 3.1.6 Removing the headphone board/ AUX board...
  • Page 14 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 15 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 16 3.1.9 Removing the heat sink/power board (See Fig.20 ~ 27) • Prior to performing the following procedure, remove the front panel assembly. (1) Remove the four screws U 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 17 Heat sink Unsolder Heat sink Power board Band Power board Band e Joint f Holder Power board Fig.25 Bracket Unsolder Band Unsolder Fig.23 Power board Heat sink Power board Fig.26 Fig.24 (No.MB330)1-17...
  • Page 18 Power trnsfomer assembly Rear cover Fig.27 FM antenna board Rear cover Power cord folder G' H' AC connect board Fig.28 1-18 (No.MB330)
  • Page 19 3.1.12 Removing the DAB module board (See Fig.29,30) • Prior to performing the following procedure, remove the front panel assembly. CD mechanism assembly • Reference; It is not necessary to remove the main board. (1) From the left side of the body, remove the two screws K’ attaching the DAB module board.

  • Page 20: Adjustment

    SECTION 4 ADJUSTMENT Cassette amp. section Item Measuring condition Check and adjustment procedure Standard value Adjusting point Head azimuth Test tape : 8 kHz 1.Playback the test tape (8kHz). Output level : Head azimuth adjustment Signal output : phone 2.Adjust the head azimuth adjusting screw so within 2dB of adjusting screw...
  • Page 21 Tuner section Item Measuring condition Check and adjustment procedure Standard value Adjusting point AM IF Signal input : T002 1.T026 and T006 connected with a 3.3k ohm T101 adjustment Signal output : T007 resistor. T102 2.Set the intermediate frequency sweep T103 generator to AM 450 kHz.
  • Page 22 Location of adjusting parts Cassette mechanism CASSETTE MOTOR Tape Speed Adj. Main board assembly T103 T102 T101 TC101 L101 L102 TC102 T105 L203 T104 VR101 T106 1-22 (No.MB330)

  • Page 23: Troubleshooting

    SECTION 5 TROUBLESHOOTING Ciruit Symptom Cause and Remedy General No sound Defect in IC801 Check voltages. Replace if necessary. Defect in IC301 Check voltages. Replace if necessary. No sound, Weak sound Defect in IF T101, T102, T103 (Low sensitivity) Check resistance, voltage and current. Replace as needed. Defect AM antenna coil T106 or oscilloscope coil T104 Replace if necessary.
  • Page 24 Victor Company of Japan, Limited AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB330) Printed in Japan...
  • Page 25 SCHEMATIC DIAGRAMS MICRO COMPONENT SYSTEM UX-HB4 CD-ROM No.SML200410 SP-UXHB4 CA-UXHB4 SP-UXHB4 Area suffix B ------------------------------ U.K. Contents Wiring connection Block diagram Standard schematic diagrams 2-7 to 9 Printed circuit boards No.MB330SCH COPYRIGHT 2004 Victor Company of Japan, Limited. 2004/10...
  • Page 26 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 27: Wiring Connection

    0 --- BLACK P/N:20-41072-60 CN606 P/N:25-61060-80 CN501 P/N:30-00300-02L CN808 CN802 CN805 P/N:11-0004-22 UX-HB4 CPU&KEY PCB 2 0 9 P/N:11-00004-27 UX-HB4 AC CONNECT PCB CO COJA SA P/N:20-61031-60 P/N:20-41022-87 P/N:11-0004-20 UX-HB4 MAIN PCB P/N:20-41061-81 CN103 P/N:11-00004-26 UX-HB4 FM ANT PCB P/N:98-00010-80 P/N:29-00300-00 P/N:20-41092-81...

  • Page 28: Block Diagram

    Block diagram TUNER FRONTIER CASS AUX IN FS2020 LOGIC DECK SECTION RCA JACK BU1924F DAB MODULE AN7312 TEA5757 LCD DISPLAY MODULE (S6A0094) TUNER L/R AUX IN L/R POWER AMP KEY SCAN L/R SPEAKER FUNCTION SELECTOR GM16312 LA4725 PRE. EQ SM89516A VOLUMN CONTROL PT2314 POWER AMP...

  • Page 29: Standard Schematic Diagrams

    Standard schematic diagrams Power circuit Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
  • Page 30 Main circuit Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
  • Page 31 CD circuit Parts are safety assurance parts. When replacing those parts make sure to use the specified one.
  • Page 32 Display circuit Parts are safety assurance parts. When replacing those parts make sure to use the specified one.

  • Page 33: Printed Circuit Boards

    Printed circuit boards Main board ( forward side) ( reverse side)
  • Page 34 Display board CD board ( forward side ) ( forward side ) ( reverse side ) ( reverse side )
  • Page 35 ( forward side ) Power board ( reverse side )

  • Page 36: No.mb330Sch

    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.MB330SCH)

  • Page 37: Parts List

    PARTS LIST [ UX-HB4 ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix B ------------------------------- U.K. - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 6 Electrical parts list (Block No.01~04)
  • Page 38 Exploded view of general assembly and parts list Block No. FM ANT board AC Connect board a r d Power board Phone board Display LED board AUX board...
  • Page 39 Block No. FM ANT board AC Connect board a r d Power board hone board Display board LED board CD board AUX board...
  • Page 40 General Assembly Block No. [M][1][M][M] Symbol No. Part No. Part Name Description Local  OW66-00300-21 CD DOOR OW39-04200-80 METAL COVER OW97-09019-80 P.C.MAGNET OW49-00300-12 STABILIZER RING OW55-09019-80 FELT OW55-00141-80 NSX01-050 OW36-00003-80 EJECT SPRING OW16-10101-81 CD DOOR SWITCH OW36-00300-10 CD DOOR SPRING OW48-00300-16 CD TRAY OW63-00303-80...
  • Page 41  Symbol No. Part No. Part Name Description Local OW40-92606-01 SCREW OW81-00004-01 LCD SPONGE OW30-00300-02 POWER CORD BS SF-629 H03VVH2-F  OW48-03210-14 OW00-03316-00 DAB MODULE OW81-00004-00 WIRE COVER DAB ANT OW29-00004-00 T.ANT OW68-00004-00 FOIL SHEET Copper(x2)

  • Page 42: Electrical Parts List

    Electrical parts list Main board  Symbol No. Part No. Part Name Description Local Block No. [0][1] C102 OW05-73180-05 C CAPACITOR 18pF 50V  Symbol No. Part No. Part Name Description Local C103 OW05-73104-00 C CAPACITOR 0.1uF 50V C106 OW06-71107-20 E CAPACITOR 100uF 16V C108...
  • Page 43  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C223 OW05-73102-00 C CAPACITOR 1000pF 50V C411 OW06-70227-20 E CAPACITOR 220uF 10V C224 OW05-73102-00 C CAPACITOR 1000pF 50V C412 OW06-70227-20 E CAPACITOR 220uF 10V C225 OW05-73151-05...
  • Page 44  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R181 OW07-75103-06 C RESISTOR 10K 1/16W R327 OW07-75471-06 C RESISTOR 470 1/16W R182 OW07-74100-00T C RESISTOR 10 1/4W R328 OW07-74220-00T C RESISTOR 22 1/4W R183 OW07-75102-06...

  • Page 45: Power Board

    Power board  Symbol No. Part No. Part Name Description Local Block No. [0][2] T101 OW08-82059-80 COIL AHK7-8646 T102 OW08-82057-80 COIL AHK7-8651  Symbol No. Part No. Part Name Description Local T103 OW08-82059-80 COIL AHK7-8646 T104 OW08-94615-80 COIL OHK7-862 T105 OW08-86583-90 COIL KHI7-865...

  • Page 46: Display Board

    Display board  Symbol No. Part No. Part Name Description Local Block No. [0][3] R187 OW07-75103-06 C RESISTOR 10K 1/16W  Symbol No. Part No. Part Name Description Local R188 OW07-75222-06 C RESISTOR 2.2K 1/16W R190 OW07-75103-06 C RESISTOR 10K 1/16W R191 OW07-75152-06 C RESISTOR...
  • Page 47  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R575 OW07-75222-06 C RESISTOR 2.2K 1/16W J521 OW07-75001-05F C RESISTOR 0 1/8W R576 OW07-75222-06 C RESISTOR 2.2K 1/16W J522 OW07-75001-05F C RESISTOR 0 1/8W R577 OW07-75222-06...
  • Page 48  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C623 OW05-73104-00 C CAPACITOR 0.1uF 50V C721 OW06-71476-20 E CAPACITOR 47uF 16V C624 OW05-73104-00 C CAPACITOR 0.1uF 50V C722 OW05-73223-00 C CAPACITOR 0.022uF 50V C625 OW05-73104-00...
  • Page 49  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R690 OW07-75222-06 C RESISTOR 2.2K 1/16W XXXXX OW20-34320-00 IC SOCKET For IC603 R693 OW07-74221-50T C RESISTOR 220 1/8W XXXXX OW39-10040-00 HEATSINK PLATE For IC610 R696 OW07-75100-06...
  • Page 50 Packing materials and accessories parts list Block No. The parts without symbol number are not service. 3-14...
  • Page 51 Packing and Accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local  OW00-00300-20 SPK. BOX 15W 4ohm(x2) OW88-00004-00 INST BOOK ------------ BATTERY (x2) OW23-04910-80 AM LOOP ANT OWB-REJVCUXHB4B REMOCON OW89-00300-05 INSERT CARD OW89-00004-00 CARTON OW89-00300-02 SHEET OW85-91014-82 POLY BAG 10X14 OW85-90710-84...

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