JVC UX-V10GN, Service Manual

Page 1: ...cription of major ICs 1 2 1 4 1 5 1 15 1 19 1 20 1 20 1 21 This service manual is printed on 100 recycled paper AUTO REVERSE AUTO T APE SELECTOR DOWN UP MULTI CONTROL TAPE FM AM CD STANDBY PHONES AUX REC REV MODE AHB PRO TIMER CLOCK VERTICAL DISC LOADING MECHANISM COMPACT DIGITAL AUDIO VOLUME CD OPEN CLOSE REMOTE CONTROL RM SUXV10E CANCEL TREBLE FM AM FM MODE DISPLAY SLEEP AUX TAPE CD CD BASS AHB ...

Page 2: ...currnet check Electrical shock hazard testing After re assembling the product always perform an isolation check on the exposed metal parts of the product antenna terminals knobs metal cabinet screw heads headphone jack control shafts etc to be sure the product is safe to operate without danger of electrical shock Do not use a line isolation transformer during this check Plug the AC line cord direc...

Page 3: ... property damage resulting therefrom 3 Essential safety critical components are identified by on the Parts List and by shading on the schematics and must never be replaced by parts other than those listed in the manual Please note however that many electrical and mechanical parts in the product have special safety related characteristics These characteristics are often not evident from visual insp...

Page 4: ...afety switches malfunction the laser is able to function 6 CAUTION Use of controls adjustments or performance of procedures other than those specified herein may result in hazardous radiation exposure VARNING Osynlig laserstrålning är denna del är öppnad och spårren är urkopplad Betrakta ej strålen VARO Avattaessa ja suojalukitus ohitettaessa olet alttiina näkymättömälle lasersäteilylle Älä katso ...

Page 5: ...minal then remove the rear cover backward with releasing the hooks 1 2 3 Disassembly method Main body Removing the rear cover See Fig 1 and 2 Prior to performing the following procedure remove the rear cover Move the side panels in the direction of the arrow and remove them backward 1 Removing the side panels See Fig 3 and 4 Fig 1 Fig 2 Fig 3 Fig 4 Rear cover A A A A A Rear cover B B Side panel L ...

Page 6: ...connect the card wire from connector CN303 and the harness from CN306 and CN307 on the main board respectively Disconnect the harness from connector CN902 on the power transformer Remove the screw E attaching the main board on the right side of the body Remove the screw F and the two screws G attaching the heat sink on the back of the body 1 2 3 4 Disconnect connector CN301 and CN302 on the main b...

Page 7: ... front panel assembly toward the front 1 2 3 Removing the front panel assembly See Fig 10 to 12 Prior to performing the following procedure remove the rear cover the side panels the cassette mechanism assembly the main board and the front panel assembly Remove the plastic rivet attaching the head phone board and release the joint d 1 Removing the head phone board See Fig 13 Fig 9 Fig 10 Fig 11 Fig...

Page 8: ...r Disconnect the harness from connector CN901 on the AC supply board Remove the four screws I attaching the power transformer 1 2 3 Removing the power transformer See Fig 15 Prior to performing the following procedure remove the rear cover the side panels and the cassette mechanism assembly Disconnect the harness from connector CN901 on the AC supply board Remove the screw F attaching the heat sin...

Page 9: ...ress the eject button on the front side of the cassette mechanism assembly to open the cassette door Remove the four screws L attaching the cassette mechanism assembly on the back of the assembly 1 2 Removing the cassette mechanism assembly See Fig 16 and 17 Prior to performing the following procedure remove the rear cover the side panels and the cassette mechanism assembly Fig 16 Fig 17 Opt Dig o...

Page 10: ...3 and the harness from CN605 on the CD servo control board Remove the CD mechanism assembly from the CD mechanism cover by pulling out it from the three bosses h 1 2 3 4 5 6 Front panel assembly Removing the CD mechanism assembly See Fig 18 to 21 Remove the screw O attaching the LED board A 1 Removing the LED board A See Fig 21 Prior to performing the following procedure remove the rear cover the ...

Page 11: ... CD servo control board in the direction of the arrow by releasing the two joints j 1 2 Removing the CD servo control board See Fig 22 Remove the belt and the two screws R attaching the loading motor on the back of the front panel assembly 1 Removing the loading motor See Fig 18 Prior to performing the following procedure remove the CD mechanism cover CD mechanism assembly Remove the two screws S ...

Page 12: ...Eraser head 7 Loosen the reversing azimuth screw retaining the Playback Recording Eraser head 8 Take out the Playback Recording Eraser head from the front of the head mount 9 The Playback Recoring Eraser head should also be removed similarly according to Steps 1 8 above Reassembling the Playback Recording Eraser Head 1 Reassemble the playback head from the front of the head mount to the position a...

Page 13: ...o screws 2 retaining the main motor assembly See Fig 4 4a 2 While raising the main motor remove the capstan belt from the motor pulley See Fig 4a Caution 1 Be sure to handle the capstan belt so carefully that this belt will not be stained by grease and other foreign matter Moreover this belt should be hanged while referring to the capstan belt hanging method in Fig 5 6 Fig 4a Main motor assembly C...

Page 14: ...d pull out the flywheel R and L respectively from behind the cassette mechanism Removing the Reel Pulse P C board and Solenoid See Fig 9 1 Remove the five pails d h reataining the reel pulse P C board 2 From the surface of the reel pulse P C board parts remove the two pawls i and j retaining the solenoid Flywheel R Flywheel L Capstan shaft R Capstan shaft L Slit washer Slit washer Fig 8 Flywheel R...

Page 15: ...o Center Adjustment of main volume to reference output VOL 28 Precautions for measurement 1 Apply 30pF and 33k to the IF sweeper output side and 0 082 F and 100k in series to the sweeper input side 2 The IF sweeper output level should be made as low as possible within the adjustable range 3 Since the IF sweeper is a fixed device there is no need to adjust this sweeper 4 Since a ceramic oscillator ...

Page 16: ...g Position Cassette mechanism section Cassette mechanism section Back side Front panel assembly section Head azimuth adjusting screw Reverse side Head azimuth adjusting screw Forward side Playback Recording eraser head Head azimuth adjusting screw Forward side Head azimuth adjusting screw Reverse side ...

Page 17: ...nly when the head has been changed Test tape VT712 3kHz Measurement output terminal Headphone terminal When the test tape VT712 3kHz has been played back with the recording and playback mechanism at the beginning of forward winding the frequency counter reading of the difference between both of the mechanism should be 6 0Hz or less Adjust VR37 so that the frequency counter reading becomes 2 940 3 ...

Page 18: ...he recording and pausing condition in advance 2 While repetitively inputting the reference frequency signal of 1kHz and 10kHz from OSC IN record and playback the rape 3 While recording and playback the test tape in TYPE adjust VR31 for Lch and VR32 for Rch so that the output deviation between 1kHz and 10kHz becomes 1dB 2dB 1 While recording and playback mechanism load the test tapes AC 514 to TYPE...

Page 19: ...omatic measurement of TE amplitude and automatic tuning of TE balance 500mv div 2ms div Fig 1 Approx 3sec pin 25 of IC601 TE Approx 1 8V VREF Tracking error waveform at TOC reading Power ON Power Key Confirm that the Focus error S cuve siganl at the pin27 of IC601 is approx 2Vp p Confirm that the siganl from pin24 IC603 is 0V as a accelerated pulse during approx 400ms Confirm the waveform of the T...

Page 20: ... the life of the laser diode has expired the following symptoms wil appear 1 The level of RF output EFM output ampli tude of eye pattern will below Is RF output 1 1 0 15Vp p Replace it NO YES O K 3 Semi fixed resistor on the APC PC board The semi fixed resistor on the APC printed circuit board which is attached to the pickup is used to adjust the laser power Since this adjustment should be perform...

Page 21: ...TL AMP 1 input pin BTL AMP 1 input pin For gain adjustment BTL AMP 1 input pin Non inverting side BTL AMP 1 input pin Inverting side BTL AMP 2 input pin Inverting side BTL AMP 2 input pin Non inverting side BTL AMP 2 input pin For gain adjustment BTL AMP 2 input pin External transistor collector PNP connection 5V power supply output External transistor PNP base connection Reset output Reset output...

Page 22: ...LK MDATA DSL PLL VCO AVDD2 SUB CODE BUFFER SSEL SQCK SUBQ AVDD2 CLVS CRC BLKCK CLDCK SBCK SUBC DEMPH RESY FLAG6 RESY EFM DEMODULATION SUBCODE DEMODULATION SYNC INTERPOLATION 16k SRAM CIRC ERROR CORRECTION DEINTERLEVE LRCKIN MSEL BCLK SSEL SRDATAIN PSEL IOSEL DIGITAL DEEMPHSIS 8TIMES OVER SAMPUNC DIGITAL FILTER 1BIT DAC LOGIC S PEM R PEM L DIGITAL AUDIO INTERFASE DIGITAL AUDIO INTERFASE INTER POLAT...

Page 23: ...nal output Kick pulse output Tracking drive output Focus drive output Reference voltage input pin for D A output block TVD FOD FBA TBAL Focus Balance adjust signal output Tracking Balance adjust signal output Focus error signal input Analog input Tracking error signal input Analog input RF envelope signal input Analog input Vibration detect signal input H detect Off track signal input H off track ...

Page 24: ...EA 12 CS BDO 13 BDO 14 CS BRT 15 OFTR 16 NRFDET 17 GND 18 36 PDAC 35 PDBD 34 PDF 33 PDE 32 PDER 31 PDFR 30 TBAL 29 FBAL 28 EF 27 EF OUT 26 TE 25 TE OUT 24 CROSS 23 TE BPF 22 VDET 21 LD OFF 20 VREF 19 ENV 30 24 25 26 23 22 1 4 3 33 32 34 31 36 35 13 14 15 16 20 2 21 6 29 7 28 27 8 9 10 17 11 12 19 ENV CURCUIT RF DET AGC EQ BDO OFTR VCBA VCBA VCBA VCBA ...

Page 25: ...ection terminal ARF output terminal RF detection capacity connection terminal HPF amp capacity connection terminal Capacity connection terminal for RF discernment side envelope detection BDO output terminal Capacity connection terminal for RF discernment side envelope detection OFTR output terminal RFDET output terminal Connect to GND 3TENV output terminal VREF output terminal APC OFF control term...

Page 26: ...ction USDATA USCK UQRIN UNC USQCK ICVSS UX2 UX1 VDD UXT1 UXT2 URESET UREM URDSCK UJOG1 UBEAT2 UBEAT1 U BCTL UXRESET UMCLK UMDATA UMLD UPBMUTE ULATCH UREEL UFAUX UAVSS USAFEYCD 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 I I I I I I I I O I O I O O O O O O O O O I RESET CLOSE switch Abnormal voltage detection 1 Abnormal voltage detection 2 Body key input 1 Body key input 0 Tap...

Page 27: ...R AM OSC REG AM RF AFC AM AGC O I O I I I AM Local oscillation Signal output This is a terminal of AM Local oscillation circuit Register value between pin 26 and pin28 besides the frequency width of the input signal AM RF signal input This is an output terminal of voltage for FM AFC This is an AGC voltage input terminal for AM O O I O AM detection output FM detection output Mpx input terminal O O ...

Page 28: ...output port Input output port Data input output Function IF counter signal input IF signal output Not use AM Local OSC signal output FM Local OSC signal input Power suplly VDD 4 5 5 5V When power ON Reset circuit move PLL charge pump output H Local OSC frequency Height than Reference frequency L Low Agreement Height impedance Input for active lowpassfilter of PLL Output for active lowpassfilter of...

Page 29: ...E DATA CLOCK Q1 Q2 Q3 Q4 Vss Vdd OUTPUT ENABLE Q5 Q6 Q7 Q8 Q s Qs 1 2 3 4 5 6 7 8 16 15 14 13 12 11 10 9 1 Pin layout 8 STAGE SHIFT REGISTER 8 BIT LATHES 3 STATE OUTPUTS 1 2 3 15 Q1 Q8 10 9 DATA CLOCK STROBE OUTPUT ENABLE PARALLEL OUTPUT Q s Qs SERIAL OUTPUT 2 Block diagram BU4094BCF X IC304 IC303 Serial to parallel port extension ...

Page 30: ...p Limiter Integrator Comparator Demodulator 1 2 3 4 5 6 7 8 9 10 GND OUT1 P1 VZ IN1 IN2 VCC1 VCC2 P2 OUT2 Input Output Mode IN1 IN2 OUT1 OUT2 Brake 0 0 0 0 1 0 1 0 0 1 0 1 1 1 0 0 CLOCKWISE COUNTER CLOCKWISE Brake LB1641 IC501 DC Motor Driver 1 Pin Layout 2 Pin Functions ...

Page 31: ...ayback amplifier input R1 R2 I Playback amplifier input NF2 Playback amplifier negative feedback OUT2 Playback amplifier output EQ2 I Equlaizer CTL2 I Pre Amplifier input swithing time constant RIN2 I Recording amplifier input RNF2 I Recording amplifier negative feedback ROUT2 O Recording amplifier output O LC I ALC low cut LPF I ALC low pass filter GND I Vcc Power supply RF I Repple filter EQCTL ...

Page 32: ...1 32 UX V10GN LC75342 ...

Page 33: ...tor connection pin comprising treble band filter LIN Volume equalizer intput LSEL0 Input selector output pin L4 Input signal pin L3 Input signal pin L2 Input signal pin L1 Input signal pin NC No connect NC No connect R1 Input signal pin R2 R3 R4 I I I Input signal pin Input signal pin Input signal pin RSEL0 Input selector output pin RIN Volume equalizer intput RTRE Capacitor connection pin compris...

Page 34: ... VREF MPXIN Vdda Vssa FLOUT CIN TEST XOUT XIN Vssd Vddd MODE RST RDDA RDCL RDS ID READY I O O O O O O I I I I I I I O Reference voltage output Vdda 2 Baseband multiplexed signal input Analog power supply 5V Analog ground Subcarrier input comparator input Subcarrier input filter output Test input Crystal oscillator input exeternal reference input Crystal oscillator output 4 332MHz Digtal ground Dig...

Page 35: ...0GN Printed in Japan 200012 O No 20886 UX V10GN VICTOR COMPANY OF JAPAN LIMITED AUDIO COMMUNICATION BUSINESS DIVISION PERSONAL MOBILE NETWORK BUSINESS UNIT 10 1 1Chome Ohwatari machi Maebashi city 371 8543 Japan ...