JVC HX-Z3 Service Manual Download Page 28 | Manualshive

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HX-Z3

BH3874AKS2 (IC434) : Volume

1.

Pin

layout

2. Block diagram

47

INLD

45

43

41

42

44

46

48

52

INLC

INLB

INLA

INRA

INRB

INRC

INRD

RECR

40

36 37 38 39 1 2 5 6 9 10 13 14 16

20 21

22

50

49

33

34

35

31

29

27

32

54

28

30

STEPC

SI

SCK

OUTR

CAP

BASS5

OUTL

GND

FILTER

VCC

26

25

24

23

-

+

+

-

+

+

+

-

+

-

+

-

+

-

DET

DET

DET

DET

DET

+

-

+

+

+

-

-

-

+

+

+

+

+

+

+

+

+

+

+

+

+

+

Vcc

Vcc

1
2

HPF

VCA

FILTER

HPF

ALC

DIGITAL

CONTROL

MPX

EFFECT

PS

PS

L-R

L+R

MODE SELECT

OR

-9dB

11dB

19dB

11dB

-9dB

22K

10K

10K

10.5Hz

10.5Hz

10.5Hz

10.5Hz

10.5Hz

0~30dB

-30dB~-

5 BAND EQ

5 BAND EQ

19

18

17

15

63 64 3 4 7 8 11 12

58

57

60

59

62

61

51

56

55

53

1 ~ 16

48 ~ 33

32

~

17

49

~

64

ALCC

ALCR

HPFR3

HPFR2

HPFR1

F5R

F4R2

F4R1

F3R2

F3R1

F2R2

F2R1

F1R2

F1R1

BPOUT

A

B

C

BASS4

BASS3

BASS2

BASS1

HPFL3

HPFL2

HPFL1

F5L

F4L2

F4L1

F3L2

F3L1

F2L2

F2L1

F1L2

F1L1

DPLL2

DPLL1

DPLR2

DPLR1

PS2

PS1

RECL

MIC

VFC2

VFC1

BPNF

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27
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Summary of Contents for HX-Z3

Page 1: ...precautions Preventing static electricity Important for laser products Disassembly method Adjustment method Contents Flow of functional operation until TOC read CD Maintenance of laser pickup Replacement of laser pickup Description of major ICs 1 2 1 3 1 4 1 5 1 21 1 25 1 26 1 26 1 27 35 UW Brazil Mexico Peru Area Suffix ...

Page 2: ...ct 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 directly into the AC outlet Using a Leakage Current Tester measure the leakage current from each exposed metal parts of the cabinet particularly any exposed...

Page 3: ...ce can easily destroy the laser diode 4 Handling the traverse unit optical pickup 1 Do not subject the traverse unit optical pickup to strong shocks as it is a sensitive complex unit 2 Cut off the shorted part of the flexible cable using nippers etc after replacing the optical pickup For specific details refer to the replacement procedure in the text Remove the anti static pin when replacing the t...

Page 4: ...es 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 säteeseen AD...

Page 5: ...sm assembly Remove the four screws C attaching the CD changer mechanism assembly on top of the body Remove the CD changer mechanism assembly while lifting the rear part 1 2 3 Removing the CD changer mechanism assembly See Fig 4 5 Do not break the front panel tab fitted to the metal cover CAUTION Do not damage the CD fitting when removing the CD changer mechanism assembly CAUTION Main board Disasse...

Page 6: ... inner bar in the center of the front panel assembly 1 2 3 4 5 Remove the three screws E attaching the front panel assembly at the bottom of the body Release the two joints a on the lower left and right sides of the front panel assembly using a screwdriver and remove the front panel assembly toward the front 6 7 Removing the front panel assembly See Fig 6 9 Front panel need to be tilt a little bit...

Page 7: ...ntenna board on the right side of the body Remove the band attaching the antenna board Remove the two screws F on the rear panel on the back of the body 1 2 3 Removing the antenna board See Fig 10 11 There is no need to remove the CD changer mechanism assembly REFERENCE Fig 10 Fig 11 Rear panel Rear panel CN1 Antenna board Band F ...

Page 8: ...bar Remove ten screws F from rear panel Detach joint b to release rear panel from inner bar Release joints c which on right bottom and left bottom of rear panel The joint can be release by pull outward the side of rear panel 1 2 3 4 5 6 Removing the rear panel See Fig 12 16 Fan assembly will come off with rear panel REFERENCE Fig 12 Fig 14 Fig 13 Fig 15 Fig 16 Inner bar Inner bar Holding board Pla...

Page 9: ...ket which is located on the inner bar two joins y 1 2 3 Removing the T flux board See Fig 17 18 Prior to performing the following procedure remove the metal cover the CD changer mechanism assembly the antenna board and the rear panel Disconnect the card wires from connector CN44 CN504 CN870 and CN922 on the main board Remove the screw D attaching the main board Disconnect connector CN217 and CN311...

Page 10: ...onnect the wire from connector CN212 CN213 and CN214 on the primary board respectively and remove the band attaching the wires Disconnect the wire from connector CN701 on the bridge board Remove the two screws I attaching the heat sink bracket and move the heat sink in the direction of the arrow to release from the base chassis two joints i The bridge board and the regulator board come off with th...

Page 11: ...to detach regulator board from heat sink 6 7 8 As assembly back the regulator board and bridge board to heat sink Regulator board must be assembly to heat sink first and screws K and L must be screwed before bridge board attach to regulator board CAUTION Heat sink bracket Heat sink bracket Fig 26 Fig 27 Heat sink Heat sink Bridge board Bridge board Regulator board Regulator board J K L M L CN215 C...

Page 12: ...ching the wire extending from the headphone board Remove the screw R and pull out the headphone board backward 1 2 Removing the headphone board See Fig 30 Prior to performing the following procedure remove the metal cover the CD changer mechanism assembly and the front panel assembly Front panel assembly When disconnecting the power cord from connector CN250 on the primary board remove the fixing ...

Page 13: ...de knob on the front panel toward the front Pull out the volume knob encorder and remove the two screws W attaching the knob holder Remove the nut from the front panel Remove the five screws U attaching the stay bracket 2 Remove the eight screws V attaching the bottom board 1 2 3 4 Removing the bottom board See Fig 33 37 Fig 33 Fig 34 Fig 35 Fig 39 Fig 36 Fig 37 Fig 38 S T T T T T T U U V V V Disp...

Page 14: ...servo control board Remove the screw B retaining the lod stopper From the T bracket section b and clamper base section c remove both of the edges fixing the rod Remove the three screws C retaining the T bracket Remove the screw D retaining the clamper assembly From the left side face of the chassis assembly remove the one screw E retaining both of the return spring and lock lever By removing the p...

Page 15: ...arrow direction f until these stages stop At the position where the CD tray assembly has stopped pull out the CD tray assembly while pressing the two pawls g and g on the back side of CD tray assembly In this case it is easy to pull out the assembly when it is pulled out first from the stage CD tray assembly 9 10 11 12 13 In case the driver unit elevator is not at above position set the elevator t...

Page 16: ...it 1 2 Removing the CD loading mechanism assembly See Fig 10 Removing the CD traverse mechanism See Fig 11 and 12 Move the cam gear in the arrow direction m Then the CD pickup unit will be moved in the arrow direction n According to the above step shift the CD pickup unit to the center position While pressing the stopper retaining the shaft in the arrow direction o pull out the shaft in the arrow ...

Page 17: ... notch position on the cam gear q Pull out the drive unit and cylinder gear While turning the cam gear q align the Paul s position of the select lever to the notch position on the cam gear q Remove the four screws H retaining the cam unit cam gear q and cams R1 R2 assembly 1 2 3 4 Removing the cam unit See Fig 15 17 Cam gear q Drive unit r G H H Chassis assembly Tray select switch board CD servo c...

Page 18: ... the arrow direction 1 2 3 4 5 Removing the actuator motor and belt See Fig 18 21 When the chassis assembly is turned over under the conditions wherein the gear bracket and belt have been removed then the pulley gear as well as the gear etc constituting the gear unit can possibly be separated to pieces In such a case assemble these parts by referring to the assembly and configuration diagram in Fi...

Page 19: ...e assembly 1 Removing the C G base assembly See Fig 22 and 23 To reassemble the cylinder gear etc with the cam unit cam gear and cans R1 R2 assembly gear unit and drive unit align the position of the pawl x on the drive unit to that of the notch on the cam gear q Then make sure that the gear unit is engaged by turning the cam gear q CAUTION Slit washer Pawl Cam R2 Slit washer Cam gear q Cam switch...

Page 20: ... Removing the screw A 1 2 Removing the CD mechanism board See Fig 26 Prior to performing the following procedure remove the CD mechanism board Form the top side of the CD mechanism assembly remove the two screws B and two screws C attaching the spindle motor and the feed motor respsctively 1 Removing the Spindle motor Feed motor See Fig 27 When reassenbling attch the pickup unit to the chassis bas...

Page 21: ...tput 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 is used there is no need to perform any MIX adjust...

Page 22: ...1 10 CN32 9 1IC31 8 9 IC32 1 16 16 1 8 9 IC33 L301 Q101 Q201 Q305 Q302 B168 C334 B Q375 E Q376 Q371 B E C201 R101 R102 C104 R105 R106 R107 R108 C221 R110 R111 R112 R121 R201 R202 C204 R205 R206 R207 R208 C111 R210 R211 R212 R221 R301 R303 R304 B167 R335 R315 R314 R313 R310 R122 Q103 R305 B151 R371 R375 R376 R372 R338 R337 R341 R342 R343 R339 R336 R331 VR31 VR37 C210 C110 C102 C101 Q372 C213 C211 R...

Page 23: ...y 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 09...

Page 24: ... mechanism to the 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...

Page 25: ...Automatic 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 Play Key Confirm that the Focus error S cuve signal at the pin28 of IC651 is approx 2Vp p Confirm that the signal from pin24 IC651 is 0V as a accelerated pulse during approx 400ms Confirm the waveform of the...

Page 26: ...of the laser diode has expired the following symptoms will appear 1 The level of RF output EFM output ampli tude of eye pattern will below Is the level of RFOUT under 1 25V 0 22Vp 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...

Page 27: ...T OUTPUT BUFFER OPEN DRAIN 12BIT STRAGE RESISTER 12BIT SHIFT RESISTER 1 Terminal Layout 1 2 3 4 5 16 17 18 Vss DATA CLOCK LCK Q0 Q11 OE Vdd I I I O I Connect to GND Serial Data input Shift Clock of Data Latch Clock of Data Parallel Data Output Output Enable Power Supply Pin No Symbol I O Function Latch Data L H OUTPUT ON OFF 2 Pin Function BU2092 IC811 EXT IC ...

Page 28: ...cc Vcc 1 2 HPF VCA FILTER HPF ALC DIGITAL CONTROL MPX EFFECT PS PS L R L R MODE SELECTOR 9dB 11dB 19dB 11dB 9dB 22K 10K 10K 10 5Hz 10 5Hz 10 5Hz 10 5Hz 10 5Hz 0 30dB 30dB 5 BAND EQ 5 BAND EQ 19 18 17 15 63 64 3 4 7 8 11 12 58 57 60 59 62 61 51 56 55 53 1 16 48 33 32 17 49 64 ALCC ALCR HPFR3 HPFR2 HPFR1 F5R F4R2 F4R1 F3R2 F3R1 F2R2 F2R1 F1R2 F1R1 BPOUT A B C BASS4 BASS3 BASS2 BASS1 HPFL3 HPFL2 HPFL...

Page 29: ...namic bass filter setting pin Biamp output pin VCC 2 pin ALC trap frequency setting pin Power supply pin Rch output pin Lch output pin Time conatant attachment for switching shook protection Pin NO 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 SI SCK C B A BPOUT BPNF INLA INRA INLB INRB INLC INRC INLD INRD ALCC ALCR RECL RECR VFC1 GND VFC2 MIC DPLL1 D...

Page 30: ...n layout 1 2 3 1 VCC 2 GND 3 OUTPUT 1 3 2 COMMON GND OUTPUT INPUT Q16 Q15 R14 Q10 R16 R15 R26 R10 Q11 1 R20 R9 R21 Q8 Q19 Q14 Q17 Q6 Q1 C1 Q7 Q9 Q5 Q4 Q3 Q13 Z1 Q2 Q18 Q12 Q11 R17 R22 R1 R12 R11 R13 R4 R5 R18 R2 R3 R6 R8 R7 R19 2 Block diagram ...

Page 31: ...n layout 1 2 3 1 VCC 2 GND 3 OUTPUT 1 3 2 COMMON GND OUTPUT INPUT Q16 Q15 R14 Q10 R16 R15 R26 R10 Q11 1 R20 R9 R21 Q8 Q19 Q14 Q17 Q6 Q1 C1 Q7 Q9 Q5 Q4 Q3 Q13 Z1 Q2 Q18 Q12 Q11 R17 R22 R1 R12 R11 R13 R4 R5 R18 R2 R3 R6 R8 R7 R19 2 Block diagram ...

Page 32: ...1 3 2 7 5 4 6 13 18 17 14 15 16 12 9 8 11 10 TR41 R41 Comparator D42 D43 D53 D52 SUB Comparator TR51 R51 D51 D41 TR11 TR12 R11 C11 TR13 TR14 C12 TR16 D12 R13 R14 R15 R12 TR15 R16 R17 TR17 TR18 TR19 TR20 TR10 TR9 TR8 TR7 R7 R6 D1 TR5 R2 R5 R4 TR6 C2 TR4 TR2 TR1 TR3 R1 C1 R3 D2 ...

Page 33: ... VSS1 GND Oscillation Oscillation Powersupply Connect to VSS1 VC3 reset VC3 status input VC3 KCMND serial data RDS data RDS clock Buzzer on Remocon input System mute SLC chip enable SLC tuner clock SLC tuner data out Tuner data in Soundmode reverse Soundmode forward Echo 1 data Echo 2 data Pin NO 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 78 79 80 81 84 85 100...

Page 34: ...C360 Regulator 1 Terminal layout 1 2 3 1 VCC 2 GND 3 OUTPUT V INPUT V OUTPUT A OUT A IN A IN V 1 2 3 4 A B TOP VIEW 8 7 6 5 V B IN B IN B OUT 1 Terminal layout 2 Block diagram NJM4580D IC501 IC502 IC571 Input amp AHB control ...

Page 35: ...1 35 HX Z3 STK402 070 IC602 Main power IC 1 Terminal layout 2 Block diagram PRE VCC LIN LIN SUB GND C C BIAS PRE VCC VE LCH VE LCH VE RCH VE RCH RIN RIN VCC1 VCC ...

Page 36: ...Printed in Japan 200208 VICTOR COMPANY OF JAPAN LIMITED AUDIO COMUNICATION BUSINESS DIVISION PERSONAL MOBILE NETWORK BUSINESS UNIT 10 1 1chome Ohwatari machi Maebashi city 371 8543 Japan No 21141 HX Z3 ...

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