JVC UX-J55V Service Manual

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Instructions manual (36 pages)

Instruction manual (36 pages)

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Page 1: Table Of Contents
SERVICE MANUAL MICRO COMPONENT SYSTEM MB057 2003 UX-J55V COMPACT DIGITAL VIDEO STANDBY/ON DISPLAY CLOCK /TIMER SLEEP BASS TREBLE PREV. NEXT CANCEL DOWN FM/AM /SELECT TAPE REV. MODE MODE RETURN PRGM RANDOM REPEAT KARAOKE STILL DIGITAL ECHO RM - SP-UXJ55V CA-UXJ55V...
Page 2 SPECIFICATION 120 W (60 W + 60 W) at 6 Ω (10% THD) Amplifier Output Power Audio input sensitivity 400 mV/48 kΩ /Impedance (at 1 kHz) Speakers/Impedance 6 Ω - 16 Ω Tuner FM tuning range 87.50 MHz - 108.00 MHz AM tuning range AM 10 kHz intervals 530 kHz - 1 710 kHz...
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 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. 1.5.1 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 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 lock failed or defeated. Avoid direct exposure to beam. 6.CAUTION : Use of controls, adjustments or performance of procedures other than those specified herein may result in 3.CAUTION : There are no serviceable parts inside the hazardous radiation exposure.
Page 6: Specific Service Instructions
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. 1-6 (No.MB057)
Page 7: Disassembly
SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the metal cover (See Fig.1~3) (1) Pull out the MIC volume knob on top of the body. (2) Remove the six screws A on the back of the main body. (3) Remove the two screws B on each side and remove the metal cover in the direction of the arrow.
Page 8: See Fig.
3.1.2 Removing the rear cover (See Fig.4) (1) Remove the two screws D attaching the rear cover. Rear cover Fig.4 1-8 (No.MB057)
Page 9 3.1.3 Removing the rear panel / fan assembly (See Fig.5,6) • Prior to performing the following procedure, remove the metal cover and the rear cover. (1) Remove the twelve screws E attaching the rear panel. Release the two joints a on the rear side and the two joints Rear panel b on each side.
Page 10: See Fig.
3.1.5 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 on the tuner board. (2) Remove the two screws H on the rear side and the screw J in the side.
Page 11 3.1.7 Removing the main board / the heat sink board / the speaker board / the vocal cancel board (See Fig.9~11) • Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, and the VCD mechanism CN900 Main board assembly.
Page 12 3.1.8 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 VCD mechanism assembly and the main board. (1) Disconnect the power cord from the connector J1000 on the power transformer assembly.
Page 13 3.1.9 Removing the front panel assembly (See Fig.13,14) • Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, and the VCD mechanism Front panel assembly assembly. (1) Remove the two screws Q on each side. Release the two joints h on the both sides and lift the front panel assembly to release the joint j.
Page 14: No.mb057)1
3.1.10 Removing the phones board (See Fig.15) • Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel, the VCD mechanism assembly and the front panel assembly. (1) Disconnect the wire from the connector CN913 on the main board.
Page 15 3.1.12 Removing the switch board (See Fig.17,18) • Prior to performing the following procedure, remove the front panel assembly. LCD board assembly (1) Remove the four screws T attaching the switch board. (2) Move the switch board in the direction of the arrow to disconnect the wire from the connector CN762 and the...
Page 16 3.1.14 Removing the control panel assembly (See Fig.19,20) • Prior to performing the following procedure, remove the front panel assembly, the switch board and the LCD board assembly. (1) Remove the three screws Y attaching the control panel assembly. (2) Release the three joints k and open the cassette door while pressing the cassette door, and then remove the control panel assembly in the direction of the arrow.
Page 17 3.1.15 Remiving the control board (See Fig.21,22) • Prior to performing the following procedure, remove the front panel assembly, the switch board, the LCD board assembly Control panel assembly and the control panel assembly. (1) Pull out the volume knob. (2) Remove the six screws A’...
Page 18 3.1.16 Removing the VCD board / CD servo control board (See Fig.23~26) • Prior to performing the following procedure, remove the metal cover, the rear cover, the rear panel and the VCD mechanism VCD mechanism assembly assembly. Board bracket CN606 Caution: Before disconnecting the card wire extending from the CD pickup, make sure to solder the short-circuit point on the CD...
Page 19 Card wire Pick up board Short round Fig.26 (No.MB057)1-19...
Page 20 Cassette mechanism assembly 3.2.1 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 21 3.2.2 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 22 3.2.4 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. Pull out the flywheels backward.
Page 23 3.2.6 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 24: Adjustment
SECTION 4 ADJUSTMENT Measurement Instruments Required for Adjustment (1) Low frequency oscillator 4.2.2 Tuner section This oscillator should have a capacity to output 0dBs to Voltage applied to tuner +B : DC5.7V 600Ω at an oscillation frequency of 50Hz-20kHz. VT : DC 12V (2) Attenuator impedance : 600Ω...
Page 25 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 C374...
Page 26 4.3.1 Mechanism section Adjustment Item Condition Measurement method Ref. value position Head azimuth Test tape (1) Playback the test tape VT703L (8kHz). Maximum output Only adjust :VT703L (8kHz) (2) Adjust to maximum output level by azi- at changed Output terminal muth adjustment screw for forward side head :Speaker out...
Page 27 4.3.2 Electrical adjustment Adjustment Item Condition Measurement method Ref. value position Recording BIAS • Forward or Reverse (1) Set the test tape(AC-514 TYPE ll and AC-225 VR31 adjustment • Test tape AC-225 TYPE l), then make REC/ : 4.20µA : AC-514 TYPE ll PAUSE condition.
Page 28: Troubleshooting
SECTION 5 TROUBLESHOOTING Flow of functional operation untill 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 29 Maintenance of laser pickup (CD) 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 30 VICTOR COMPANY OF JAPAN, LIMITED AV & MULTIMEDIA COMPANY AUDIO/VIDEO SYSTEMS CATEGORY 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan (No.MB057) Printed in Japan...
Page 31: Schematic Diagrams
SCHEMATIC DIAGRAMS MICRO COMPONENT SYSTEM UX-J55V CD-ROM No.SML200312 COMPACT DIGITAL VIDEO STANDBY/ON DISPLAY CLOCK /TIMER SLEEP BASS TREBLE PREV. NEXT CANCEL DOWN /SELECT TAPE FM/AM REV. MODE MODE RETURN PRGM RANDOM REPEAT KARAOKE STILL DIGITAL ECHO SP-UXJ55V CA-UXJ55V SP-UXJ55V COMPACT...
Page 32 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. (This regulation does not correspond to J and C version.)
Page 33: Block Diagram
Block diagram IFOUT LED1 COM0 to COM3 STEREO OSCOUT MUTE/IFOUT LED2 S1 to S18 LOUT S19 to S34 FM RF FM/AM,SDIN ROUT ST/MONO FMIN FM DET CN731 CN730 AMOSC AMIN AM DET AMRF DATE CN931 CN930 IC611 SDATA AM RF AMOSC MICSIG S19~S34...
Page 34 Standard schematic diagrams Primary section FW950 CN951 QUM156-16DGZ4 QGD2504C1-03Z Q1000 KTC3199/GL/-T Q1001 KTC1027/OY/-T D1011 C1009 0.0047 C1010 R1002 470/6.3 D1014 Q1003 2SD1266/P/ S1000 C1014 QSW0812-001 0.0047 C1008 F1002 R1012 QCZ9105-472 R1011 C1011 8.2K 470/63 D1012 R1003 R1004 4.7K 1SS119-041-T2 F1000 J1000 QGA7901C1-02 Parts are safety assurance parts.
Page 35 10/35 100P D4003 D4002 MTZJ9.1B-T2 MTZJ9.1B-T2 R4032 R4031 100UNF( 1/4W) 100UNF( 1/4W) C4003 R4001 4.7K 10/35 C4017 Q4502 R4011 C4016 2SC3576-JVC-T R4010 R4502 0.022 0.022 C4011 2.2K C4010 Q4503 2SC3576-JVC-T R4503 R4015 R4014 2.2K 10UNF( 1/4W) 10UNF C4036 C4500 0.022...
Page 36 Q2221 AUXL QQR0621-001Z C2210 D2205 D2207 R2207 D2206 120K 4.7/50 R2208 C2228 R2119 R2115 R2015 R2100 AUXR C2207 Q2210 Q2209 2SC3576-JVC-T 10/16 2SC3576-JVC-T K2920 L2920 KTA1046/Y/ QQL28AK-101 Q2920 ICP-N25-T P2920 D2920 2.2K R2922 0.01 Q2923 C2201 KRC102M-T D2200 K2921 D2201...
Page 37 FL / Key control / Micon section CN903 QGF1016F3-19 0.001 C2505 D7080 1000/6.3 C7080 Q7080 2SA952/LK/-T 0.001 C7144 R7245 0.001 C7146 QLD0261-001 2.2K R7150 DI731 R7031 COM3 COM3 LEDCTL COM2 COM2 COM1 COM1 R7151 R7122 2.2K COM0 COM0 R7152 2.2K KEY1 SDATA R7123...
Page 38 2.2/50 C6008 C6020 3300P C6004 1/50 2.2/50 R6010 C6017 C6009 22/16 D6001 560K 100P R6033 1SS119-041-T2 5.1K R6008 R6002 R6016 R6015 J6001 R6031 QNS0170-001 150K Q6001 C6005 R6011 2SC3576-JVC-T 3.9K R6018 Q6002 C6022 2SC3576-JVC-T R6034 C6024 0.01 2.2/50 C6025 1000P...
Page 39 CD servo control section R862 R863 R856 REST DSASTB DRMUTE 2.2K R864 CloseSW R865 R867 OpenSW R866 R868 OPEN P.ON CLOSE R869 BLKCK R857 R858 uDSAACK IC851 STAT R859 uDSADAT MN101C30A MDATA R860 uDSASTB MCLK /P.ON R861 CDMRST R885 VCDRST TLOCK R870 SQCK...
Page 40 VCD control section LA17 IC102 LA16 LA15 LA12 R118 D102 R119 L101 3.3U DGND C113 Q101 D101 X101 C111 C112 C115 R120 QAX0700-001Z 470p 470p C114 L102 R121 3.3u 100k 1000p K101 C131 C130 0.1/16 100/10 K102 VGND VDD3 DGND VDD3 C120 CN102...
Page 41 Tuner section 0.0039 0.47/50 0.0022 470P 0.047 22/16 0.27 1/50 0.047 22/16 10/16 0.001 10/16 100/10 1000P R8( D2) *C43 *C42 3.3K VCF2L3B-105Z LC72136N 1SS133-T2 LA1838 1SS133-T2 QNB0014-001 VCF2L3B-105Z 5.6K DTA114YKA-X 150P QQR0793-001 150P 150P 1/50 1.2K 0.022 QQR0796-002 0.047 QAX0610-001Z 100/10 3.3k...
Page 42 MSI-5U2LWA R371 R108 RECL R106 R302 R110 2.2K CN42 Q342 QGF1205F1-09 KRA111M-T C104 VR37 C102 QVP0077-103Z 0.01 220p Q343 R306 2SC3576-JVC-T 4.7K R336 R344 Q344 C340 2SC3576-JVC-T 47/50V CN32 4.7K QGF1205F1-09 R339 C341 Q345 R345 100K 1/50V C304 2SC3576-JVC-T 10/16V R304 4.7K...
Page 43 Printed circuit boards J900 J900 R2000 R2000 CN903 CN903 CN902 CN902 K2504 K2504 [B2029] [B2029] Main board C2503 C2503 R2050 R2050 CN904 CN904 R2150 R2150 C2150 C2150 C2050 C2050 R2223 R2223 C2508 C2508 [B2040] [B2040] R2222 R2222 K2505 K2505 K2501 K2501 J901 J901...
Page 44 Trans board / FL / Front board S7523 S7521 S7522 S7520 R7520 C7502 D7502 CN760 C7504 CN762 JS751 R7523 R7514 R7517 R7522 C7511 D7600 D7602 D7604 R7515 D7605 CN761 D7603 D7601 L4002 R7501 D7610 D7608 D7606 S7514 CN750 S7515 S7517 S7516 D7503 IC750...
Page 45 CD servo control board Cassette mechanism control board VR37 R371 FW100 CN33 C374 PP300 R310 CN34 R105 R313 CN32 R342 C105 C107 Q302 C205 R372 Q375 C310 Q376 R205 Q372 R338 C314 C371 C313 R376 R375 R337 R335 L301 R305 C331 R353 C300...
Page 46 VCD board (forward side) VCD board (reverse side) IC106 CN101 CN102 IC105 C143 C112 L101 C111 K101 R146 C115 C113 C131 R105 C104 D101 IC101 X101 C117 R101 C105 C103 C114 R128 D102 R121 R132 R130 R135 C118 R136 C129 C121 IC104 C133...
Page 47 < M E M O >...
Page 48 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.MB057SCH)
Page 49: Parts List
PARTS LIST [ UX-J55V ] * All printed circuit boards and its assemblies are not available as service parts. Area suffix US ---------------------- Singapore UN ----------------------------Asean - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1) 3- 5 Speaker assembly and parts list (Block No.M2)
Page 50 Exploded view of general assembly and parts list Block No.
Page 51 Tuner board...
Page 52 SPECIAL SCREW 3mm x 8mm QYSBSGY3008E SPECIAL SCREW 3mm x 8mm(x2) GV10123-003A FRONT PANEL QYSBSGY3008E SPECIAL SCREW 3mm x 8mm(x2) GV40077-002A JVC BADGE QYSBSGY3008E SPECIAL SCREW 3mm x 8mm GV40367-001A REMOTE LENS QYSBSGY3008E SPECIAL SCREW 3mm x 8mm(x2) GV40366-001A STANDBY LENS...
Page 53 Speaker assembly and parts list Block No. Speaker Block No. [M][2][M][M] Symbol No. Part No. Part Name Description Local 993060400036 TWEETER ASSY (x2) 991061200072 CONE SPEAKER (x2) 135604141062 SCREW (x12) 151732601147 FRONT PANEL (x2) 108650251048 DIAPHRAGM (x2) 138730251130 D.SIDE TAPE (x2) 147780121071 GROMMET...
Page 54 CD loading base assembly and parts list Block No. LOAD-JEM-2M FIG A Apply grease to groove Grease and support convex. = G-474C = EBS0006-009B FIG A Dimension gap for motor pulley...
Page 55 CD loading mechanism Block No. [M][D][M][M] Symbol No. Part No. Part Name Description Local VYH1238-001 LOADING BASE MMN-6F1LB8K MOTOR QGF1201F3-05 CONNECTOR FFC/FPC (1-5) QSW0472-001 SWITCH QYSPSPT2640Z SCREW 2.6mm x 4mm(x2) E75984-221SS MOTOR PULLEY E75950-002 C.D BELT E75985-221SS C.D GEAR (1) E75986-221SS C.D GEAR (2) E75987-221SS...
Page 56 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 57: Cassette Mechanism
Cassette mechanism Block No. [M][P][M][M] Symbol No. Part No. Part Name Description Local VKS1165-00N CHASSIS B. ASSY VKS2274-002 REEL GEAR (x2) VKW5286-002 B.T. SPRING (x2) VKS5559-001 PLAY IDLE GEAR VKS5595-002 BLIND VKS5560-003 FR IDLE GEAR LV42013-001A EARTH SPRING SLC-RP4SVM HEAD MOUNT ASSY VKY3149-002 CASSETTE SP.
Page 58: Electrical Parts List
M CAPACITOR 2700pF 50V J IC932 KIA7806API C2012 QFLC1HJ-104Z M CAPACITOR 0.1uF 50V J C2013 QFLC1HJ-104Z M CAPACITOR 0.1uF 50V J Q2209 2SC3576-JVC-T TRANSISTOR C2014 QFVJ1HJ-184Z MF CAPACITOR 0.18uF 50V J Q2210 2SC3576-JVC-T TRANSISTOR C2015 QFVJ1HJ-184Z MF CAPACITOR 0.18uF 50V J...
Page 59 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C2824 QCBB1HK-473Y C CAPACITOR 0.047uF 50V K R2041 QRE141J-182Y C RESISTOR 1.8kΩ 1/4W J C2825 QCBB1HK-473Y C CAPACITOR 0.047uF 50V K R2047 QRE141J-154Y C RESISTOR 150kΩ...
Page 60 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R6013 QRE141J-102Y C RESISTOR 1kΩ 1/4W J R7173 QRE141J-222Y C RESISTOR 2.2kΩ 1/4W J R6014 QRE141J-154Y C RESISTOR 150kΩ 1/4W J R7174 QRE141J-222Y C RESISTOR 2.2kΩ...
Page 61: Power Board
KTA1267/YG/-T TRANSISTOR C4301 QETC1EM-226Z E CAPACITOR 22uF 25V M Q4302 KTC3199/GL/-T TRANSISTOR C4302 QETC1CM-476Z E CAPACITOR 47uF 16V M Q4502 2SC3576-JVC-T TRANSISTOR C4303 QETC1HM-226Z E CAPACITOR 22uF 50V M Q4503 2SC3576-JVC-T TRANSISTOR C4500 QETC1EM-106Z E CAPACITOR 10uF 25V M Q4504...
Page 62 Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local R4306 QRE141J-103Y C RESISTOR 10kΩ 1/4W J Z1008 QNG0003-001Z FUSE CLIP R4307 QRE141J-104Y C RESISTOR 100kΩ 1/4W J Z1009 QNG0003-001Z FUSE CLIP R4502 QRE141J-222Y C RESISTOR 2.2kΩ...
Page 63: Tuner Board
Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local C832 NCB31HK-103X C CAPACITOR 0.01uF 50V K R866 NRSA63J-102X MG RESISTOR 1kΩ 1/16W J C833 NCB31CK-104X C CAPACITOR 0.1uF 16V K R867 NRSA63J-102X MG RESISTOR 1kΩ...
Page 64 VCD board Symbol No. Part No. Part Name Description Local Block No. [0][5][0][0] NCB21HK-223X C CAPACITOR 0.022uF 50V K NCB21HK-473X C CAPACITOR 0.047uF 50V K Symbol No. Part No. Part Name Description Local EEKC1HM-105ZJC E CAPACITOR EEKC1HM-105ZJC E CAPACITOR EETC1HM-224ZJC E CAPACITOR IC101 ES3880FM...
Page 65 TRANSISTOR R301 QRE141J-221Y C RESISTOR 220Ω 1/4W J Q342 KRA111M-T DIGI TRANSISTOR R302 QRE141J-222Y C RESISTOR 2.2kΩ 1/4W J Q343 2SC3576-JVC-T TRANSISTOR R303 QRE141J-222Y C RESISTOR 2.2kΩ 1/4W J Q344 2SC3576-JVC-T TRANSISTOR R304 QRJ146J-101X UNF C RESISTOR 100Ω 1/4W J...
Page 66 Symbol No. Part No. Part Name Description Local R347 QRE141J-103Y C RESISTOR 10kΩ 1/4W J R353 QRZ9005-100X FUSI RESISTOR 10Ω R372 QRE141J-102Y C RESISTOR 1kΩ 1/4W J R375 QRE141J-151Y C RESISTOR 150Ω 1/4W J R376 QRE141J-472Y C RESISTOR 4.7kΩ 1/4W J VR31 QVP0008-203Z TRIM RESISTOR...
Page 67: Packing Materials And Accessories Parts List
Packing materials and accessories parts list Block No. A1A2A3 Packing and accessories Block No. [M][3][M][M] Symbol No. Part No. Part Name Description Local Symbol No. Part No. Part Name Description Local QPC02503515P POLY BAG 25cm x 35cm GV20219-004A CARTON ASSY. GV10135-001A CUSHION UPPER GVT0116-003B...

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