JVC UX-G38B Service Manual

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SERVICE MANUAL

MICRO COMPONENT SYSTEM

5 S ERVICE MANUAL

MB611

2007

UX-G38B,UX-G38E,UX-G38EN,UX-G38EV,

UX-G39E,UX-G39EN,UX-G39EV,UX-G37B,

UX-G37E,UX-G37EN,UX-G37EV

Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)

Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade)

Precaution. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Specific Service Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Disassembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

SP-UXG38

SP-UXG39

UX-G39 is derivertive model and different color model of UX-G38.

UX-G37 is different color model of UX-G38.

CA-UXG37

CA-UXG38

CA-UXG39

SP-UXG38

SP-UXG39

No.MB611

2007/5

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Summary of Contents for JVC UX-G38B

Page 1 SERVICE MANUAL MICRO COMPONENT SYSTEM MB611 2007 5 S ERVICE MANUAL UX-G38B,UX-G38E,UX-G38EN,UX-G38EV, UX-G39E,UX-G39EN,UX-G39EV,UX-G37B, UX-G37E,UX-G37EN,UX-G37EV SP-UXG38 CA-UXG37 SP-UXG38 SP-UXG38 CA-UXG38 SP-UXG38 SP-UXG39 CA-UXG39 SP-UXG39 UX-G39 is derivertive model and different color model of UX-G38. UX-G37 is different color model of UX-G38.
Page 2 SPECIFICATION 40 W (20 W + 20 W) at 6 Ω (10% THD) Amplifier section OUTPUT POWER Speakers/Impedance 500 mV/47 kΩ (at "LINE IN LVL1") Audio input LINE IN 250 mV/47 kΩ (at "LINE IN LVL2") 125 mV/47 kΩ (at "LINE IN LVL3") Audio output LINE OUT 1.0 Vrms (47 kΩ) (at "LINE OUT LVL1") 2.0 Vrms (47 kΩ) (at "LINE OUT LVL2")
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 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 7: Specific Service Instructions
SECTION 2 SPECIFIC SERVICE INSTRUCTIONS This service manual does not describe SPECIFIC SERVICE INSTRUCTIONS. (No.MB611)1-7...
Page 8: Disassembly
SECTION 3 DISASSEMBLY Main body 3.1.1 Removing the Metal cover (See Fig.1, 2) (1) Remove the six screws A attaching the metal cover. (See Fig.1) (2) Remove the two screws B attaching the both side of metal cover. (See Fig.2) Fig.1 Fig.2 1-8 (No.MB611)
Page 9 3.1.2 Removing the Front panel assembly (See Fig.3 to 5) (1) Disconnect the card wire from front panel assembly con- nected to connector CN432 of the Main board assembly. (See Fig.3) (2) Remove the two screws C attaching the Front panel as- sembly.
Page 10: Table Of Contents
3.1.3 Removing the Tuner pack (See Fig.6, 7) (1) Disconnect the card wire from Tuner pack connected to connector CN911 of the Main board assembly. (See Fig.6) (2) Remove the two screws D attaching the Tuner pack. (See Fig.7) CN911 Fig.6 Fig.7 3.1.4 Removing the Rear Panel...
Page 11: See Fig.
3.1.5 Removing the Main board assembly (See Fig.10) (1) Remove the one screw G attaching the Main board assem- bly. (2) Disconnect the connector CN373 CN709 connected Main board assembly and Power board assembly. (3) Disconnect the connector CN401 connected Main board assembly and Jack boaed assembly.
Page 12 3.1.7 Removing the CD mechanism assembly (See Fig.12, 13) (1) Remove the one screw J attaching the CD mechanism as- sembly. (See Fig.12) (2) Turnover the CD mechanism, disconnect the connector wire from CD mechanism assembly connected to connec- CN104 of the Jack board assembly.
Page 13 CD mechanism assembly • Remove the CD mechanism assembly from main body. 3.2.1 Removing the CD cover (See Fig.1) (1) Remove the two screws A attaching the CD cover from bot- tom side of CD mechanism assembly. Boss a Fixing part b (2) Lift up the CD cover from disengage boss a of the CD mechanism assembly.
Page 14 3.2.3 Removing the traverse mechanism assembly (See Fig.4) (1) Remove the four screws C attaching the traverse mecha- CD mechanism assembly nism assembly from bottom side of CD mechanism assem- bly. CD servo board Card wire (2) Disconnect the card wire from connector CN602 of the CD servo board and then take out the traverse mechanism as-...
Page 15 3.2.4 Removing the CD servo board (See Fig.5 and 6) • Remove the traverse mechanism assembly. Solder part e Yellow wire (1) Remove the two screws D attaching the CD servo board from bottom side of traverse mechanism assembly. (See Fig.5) (2) Remove the solder from solder part e of the CD servo White wire...
Page 16 3.2.5 Removing the pickup (See Fig.7 to 9) • Remove the traverse mechanism assembly. (1) Remove the one screw E attaching the plate from upper Feed gear Shaft LEAD spring side of traverse mechanism assembly. (See Fig.7) (2) Remove the plate from fixing part k then take out the plate. (See Fig.7) Part m (3) Remove the two screws F attaching the LEAD spring and...
Page 17 3.2.7 Removing the feed motor (See Fig.11 to 13) • Remove the traverse mechanism. Yellow wire (1) Remove the yellow wire from solder part q of the CD servo board from upper side of traverse mechanism. (See Fig.11) (2) Remove the white wire from solder part r of the CD servo White wire board.
Page 18 3.2.8 Removing the switch board (See Fig.14) (1) Disconnect the card wire from of the switch board Hook v Switch board Wire from bottom side of CD mechanism assembly. (2) Remove the wire from solder part u of the switch board. Solder (3) Remove the one screw H attaching the switch board to CD part u...
Page 19: Troubleshooting
SECTION 4 ADJUSTMENT TEST MODE BUTTON INDICATION FUNCTION [POWER] COLD COLD START (Initialization of set) [SET] [REPEAT] [POWER] V_E_RDS Version indication [SET] [FM MODE/PLAY MODE] [POWER] (FL ALL DISPLAY) FL all display [SET] [S.TURBO] [POWER] VOL MAX Volume level to max by compulsion. [SET] [FADE MUTING] V_E_RDS...
Page 20 Victor company of Japan, Limited Audio/Video Systems category 10-1,1chome,Ohwatari-machi,Maebashi-city,Gumma-ken, 371-8543,Japan (No.MB611) Printed in Japan...
Page 21: Micro Component System
SCHEMATIC DIAGRAMS MICRO COMPONENT SYSTEM UX-G38B,UX-G38E,UX-G38EN UX-G38EV,UX-G39E,UX-G39EN UX-G39EV,UX-G37B,UX-G37E UX-G37EN,UX-G37EV CD-ROM No.SML200705 SP-UXG38 CA-UXG37 SP-UXG38 SP-UXG38 CA-UXG38 SP-UXG38 SP-UXG39 CA-UXG39 SP-UXG39 UX-G39 is derivertive model and different color model of UX-G38. UX-G37 is different color model of UX-G38. Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade)
Page 22 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 23: Block Diagram
Block diagram System control & Audio Amp section LCD & Key switch section IC452 D2411 DI221 LINEINL/R Q4501 F+/- STANDBY LCD DISPLAY to Q4503 VFDCLK GR1 to 10 QP LINK VFDSTB LED1 SG1 to 16 VFDDIN FQPL IC221 VFDDOUT Q4601 Q4604 QPLINK LSEL0...
Page 24 Standard schematic diagrams Primary section D901 KBJ4J CN702 CN901 CN701 QGB1214K1-20S QGB2510K2-10 QGF1040F1-23 L902 F901 0.0047/2000 T901 CDIRQ CDIRQ QMFZ059-2R0-E QQR1800-001 L901 CDSTAT QQS0404-001 CDSTAT T2.0AH/250V QQR1799-001 CDRST CDRST D954 L954 FC901 FC902 R903 MBR10150CT C909 CDDATA CDDATA QNG0019-001Z QNG0019-001Z QQL56AK-220Z CDCLK C907...
Page 25 FOR FLASH Micon section EMULATOR CN706 ONLY ES&PP STEP MP NO R7092 BACKUPMUTE VOL1 R7304 2.2K R7042 2.2K TUCE VOL1 TUCE VOL2 R7303 R7041 2.2K TUCK 2.2K VOL2 TUCK R7040 2.2K TUDTI TUDTI VOLDT R7064 R7039 2.2K TUDTO VOLDT TUDTO VOLCE 2.2K R7065...
Page 26 GNA10051-A3 Front section C4302 47/25 R4301 C4301 47/25 R4302 C4303 2.2/50 R4305 C4307 C4308 C4305 100P GNA10051-A2 IC401 NJM4565M-WE C4306 100P (U only:RT1P431C-X) DI221 R4251 QLF0186-001 C4304 LINEINL Q2411 2.2/50 R4151 LINEINR IC241 NJL23H380A-E AGND R2411 LINEOUTL K4351 LINEOUTR US6V SLR-342VC-T J4351 D2411...
Page 27 1/4W 4.7K R4611 3.3K Q3706 DAB12V MA111-X D3706 Q4606 RT1P141C-X Q4604 KTC812T-X R3705 Q3702 RT1P441C-X Q3703 R3703 Q3708 Q3709 Q3701 2SC3576-JVC-T R3706 US4V C3151 R3155 R3803 C3801 D3802 IC372 C3251 R3255 IC373 IC374 RT9164A-PG-X MM1594AF-X C3717 1/16 5.6K D3701 MTZJ30C-T2 0.022...
Page 28 CD section Loader section TO MICON SECTION SHEET2 CN201 CN203 QGF1040F1-23 QJK043-050600-E TRV+ TRV- IC721 LB1641 C653 C654 0.047 C651 C652 0.047 0.047 R642 R641 QSW1074-001 C7203 47/16 C649 0.01 C7202 14 13 12 11 10 QGF1016F3-05 LOSWOP LOSWCL C650 47/16 CN721 IC601...
Page 29: Printed Circuit Boards
Printed circuit boards Power board Lead free solder used in the board (material : Sn-Ag-Cu, melting point : 219 Centigrade) (Jack board) Lead free solder used in the board (material : Sn-Cu, melting point : 230 Centigrade) J4351 J8001 J4352 K4351 K103 CN103...
Page 30 Main 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-Cu, melting point : 230 Centigrade) forward side reverse side C5114 W309 L5202 C9006 W309 C8207 C8204...
Page 31 CD 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-Cu, melting point : 230 Centigrade) forward side C615 L101 W601 C609 C617 C618 C619 C620 C650...
Page 32 Victor Company of Japan, Limited Audio/Video Systems Category 10-1,1chome,Ohwatari-machi,Maebashi-city,371-8543,Japan Printed in Japan (No.MB611SCH)
Page 33: Parts List
PARTS LIST UX-G38B,UX-G38E,UX-G38EN UX-G38EV,UX-G39E,UX-G39EN UX-G39EV,UX-G37B,UX-G37E UX-G37EN,UX-G37EV * All printed circuit boards and its assemblies are not available as service parts. * UX-G39 is derivertive model and different color model of UX-G38. * UX-G37 is different color model of UX-G38. - Contents - 3- 2 Exploded view of general assembly and parts list (Block No.M1)
Page 34 Exploded view of general assembly and parts list Block No. Power boa Front board Front View Jack board...
Page 35 Main board The parts without symbol number are not service.
Page 36 General Assembly Block No. [M][1][M][M]  Symbol No. Part No. Part Name Description Local GN10115-002A FRONT PANEL G38B,G38E,G38EN,G38EV, G39E,G39EN,G39EV GN10115-006A FRONT PANEL G37B,G37E,G37EN,G37EV GV40780-001A FELT SPACER (x2) GN20222-001A WINDOW SCREEN G38B,G38E,G38EN,G38EV GN20222-003A WINDOW SCREEN G39E,G39EN,G39EV GN20222-006A WINDOW SCREEN G37B,G37E,G37EN,G37EV GN20223-001A PUSH BUTTON G38B,G38E,G38EN,G38EV, G39E,G39EN,G39EV...
Page 37 CD mechanism assembly and parts list Block No. Grease JVG-31N GTU-MS1-12M JVS-1003 FL-7750E E-460 3.5mm 0.1mm 12.0mm 0.1mm < Back side > CD servo board The parts without symbol number are not service.
Page 38 CD mechanism Block No. [M][B][M][M]  Symbol No. Part No. Part Name Description Local QAL0844-001 PICK UP LV22529-002A RACK ARM VKZ4777-012 MINI SCREW (x2) LV37574-001A RACK ARM SPRING QYSPSGT1425MA TAP SCREW M1.4 x 2.5mm LV10855-004A TM CHASISS LV43648-001A TURN TABLE LV31744-001A P.S.SPRING QAR0302-001...
Page 39 CD loading base assembly and parts list Block No. GMU-MS1-12M Grease JVS-1003 CFD-4007ZY2 < Back side > < Top view > Backside CD loading switch board The parts without symbol number are not service.
Page 40 CD loading base Block No. [M][D][M][M]  Symbol No. Part No. Part Name Description Local LV11065-010A LOADER SUB ASSY E407140-001SS C.D ROLLER E407149-001SS RUBBER TUBE LV10979-003A TRAY LV35499-003A SHAFT GUIDE LV44022-001A SHAFT QYSSSF2008ZA TAP SCREW M2 x 8mm QYSDSF2008ZA TAP SCREW M2 x 8mm(x2) LV41741-004A SPECIAL SCREW...
Page 41: Electrical Parts List
Electrical parts list Power board  Symbol No. Part No. Part Name Description Local Block No. [0][1] C4305 NDC31HJ-101X C CAPACITOR  Symbol No. Part No. Part Name Description Local C4306 NDC31HJ-101X C CAPACITOR C4351 NRSA63J-0R0X MG RESISTOR C4399 NRSA63J-0R0X MG RESISTOR IC221 PT6315...
Page 42 C3256 QETN1HM-475Z E CAPACITOR Q3601 2SC5938A/B/-X TRANSISTOR C3311 QETN1HM-105Z E CAPACITOR Q3602 2SC5938A/B/-X TRANSISTOR C3312 QETN1HM-106Z E CAPACITOR Q3701 2SC3576-JVC-T TRANSISTOR C3341 QETN1AM-227Z E CAPACITOR Q3702 RT1P441C-X DIGI TRANSISTOR C3342 QETN1AM-227Z E CAPACITOR Q3710 KTA1267/YG/-T TRANSISTOR C3401 QETN1HM-106Z E CAPACITOR...
Page 43  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local C5103 QTE1J46-106Z E CAPACITOR C5104 NCB21CK-105X C CAPACITOR R3140 NRSA63J-153X MG RESISTOR C5105 NCB21HK-104X C CAPACITOR R3141 NRSA63J-752X MG RESISTOR C5106 NCB21HK-104X C CAPACITOR R3142 NRSA63J-473X...
Page 44  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local R4613 NRSA63J-362X MG RESISTOR R7067 NRSA63J-222X MG RESISTOR R4614 NRSA63J-472X MG RESISTOR R7068 NRSA63J-222X MG RESISTOR R4615 NRSA63J-472X MG RESISTOR R7069 NRSA63J-222X MG RESISTOR R5101 NRSA63J-682X...
Page 45  Symbol No. Part No. Part Name Description Local  Symbol No. Part No. Part Name Description Local K5102 NQR0413-002X FERRITE BEADS C631 QEKJ0JM-476Z E CAPACITOR 47uF 6.3V M K5103 NQR0413-002X FERRITE BEADS C632 NCF31CZ-224X C CAPACITOR 0.22uF 16V Z K5104 NQR0413-002X FERRITE BEADS...
Page 46  Symbol No. Part No. Part Name Description Local R650 NRSA63J-153X MG RESISTOR 15kΩ 1/16W J R651 NRSA63J-183X MG RESISTOR 18kΩ 1/16W J R652 NRSA63J-822X MG RESISTOR 8.2kΩ 1/16W J R653 NRSA63J-512X MG RESISTOR 5.1kΩ 1/16W J R654 NRSA63J-472X MG RESISTOR 4.7kΩ...
Page 47 <MEMO> 3-15...
Page 48: Packing Materials And Accessories Parts List
Packing materials and accessories parts list Block No. No additional / supplemental order of WARRANTY CARDs are available. A1,A2,A3, A4,A5,A6,A9,A12 The parts without symbol number are not service. 3-16...
Page 49 Packing and Accessories Block No. [M][3][M][M]  Symbol No. Part No. Part Name Description Local GNT0080-001A INST BOOK G38B,G37B GNT0080-002A INST BOOK G38E,G39E,G37E GNT0080-006A INST BOOK G38EN,G39EN,G37EN GNT0080-011A INST BOOK G38EV,G39EV,G37EV GNT0080-003A INST BOOK G38E,G39E,G37E GNT0080-007A INST BOOK G38EN,G39EN,G37EN GNT0080-012A INST BOOK G38EV,G39EV,G37EV GNT0080-004A...

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JVC UX-G38B Service Manual

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