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Zenith XBV323 Series Service Manual

Other manuals for XBV323 Series: Installation And Operating Manual
Manual is about: Chassis: D35; D35 DECK; DP-7C; DP-7CMD

Summary of XBV323 Series

  • Page 1

    Service manual product type: dvd+vcr chassis: d35 (deck), dp-7c(md) manual series: xbv323 manual part #: 3829rvn006p model line: f product year: 2003 summary 1 cabinet & main chassis 2 electrical 3 mechanism of vcr part 4 mechanism of dvd part 5 parts list 6 published september 2003 by technical pub...

  • Page 3: Section 1

    1-1 section 1 summary contents product safety servicing guidelines for video products ............. 1-2 servicing precautions .................................................................................................. 1-3 specifications ...........................................................

  • Page 4

    1-2 important safety notice this manual was prepared for use only by properly trained audio-video service technicians. When servicing this product, under no circumstances should the original design be modified or altered without permission from zenith electronics corporation. All components should b...

  • Page 5: Servicing Precautions

    1-3 servicing precautions caution: before servicing the dvd+vcr covered by this service data and its supplements and addends, read and fol- low the safety precautions. Note: if unforeseen cir- cumstances create conflict between the following servicing precautions and any of the safety precautions in...

  • Page 6: Specifications

    1-4 specifications general power requirements ac 120v ,60 hz power consumption 23w dimensions (approx.) 430 x 97.5 x 293 mm (16.9 x 3.9 x 11.5 inches)(w x h x d) mass (approx.) 4.8 kg (10.58 lbs) operating temperature 5 °c to 40 °c (41 °f to 104 °f) operating humidity 5 % to 90 % signal system ntsc ...

  • Page 7: Section 2

    2-1 section 2 cabinet & main chassis contents 1. Exploded views ................................................................................................................2-2 1. Cabinet and main frame section .........................................................................................

  • Page 8: Exploded Views

    2-2 exploded views 1. Cabinet and main frame section a43 a42 a49 280 465 250 467 467 467 284 283 ld601 300 330 276 260 a46 a46a a48 a00 a26 285 457 457 457 457 467 467 452 274 452 330 323 a 5 4 3 2 1 b c d.

  • Page 9

    2-3 2. Packing accessory section battery 808 bag 804 packing 803 806 instruction assembly cable(coaxial) 810 cable ass'y rf 801 remocon 900 box carton 802 packing 803 811 812 plug ass'y 1way plug ass'y 2way optional parts.

  • Page 10: Section 3

    3-1 section 3 electrical contents overall wiring diagram ..............................3-2 vcr part electrical adjustment procedures ............................................................3-3 vcr electrical troubleshooting guide .....................................................................

  • Page 11: Overall Wiring Diagram

    Overall wiring diagram 3-2 pmc01 cfg 12va(cap) 5.2va cap rev'h' i-limit motor gnd gnd 12va(drum) cap ctl ld in dfg/fg drum ctl 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7 8 9 10 11 12 pmp01 5.3va 5.0v gnd cap vcc reg 12v 33v 12va(drum) pwr ctl 'h' gnd nc gnd gnd 1 2 3 4 5 6 7 8 9 10 11 12 1 2 3 4 5 6 7...

  • Page 12: Vcr Part

    3-3 electrical adjustment procedures 1. Servo adjustment 1) pg adjustment • adjustment and specification • test equipment a) oscilloscope b) ntsc model : ntsc sp test tape mode play • adjustment procedure a) insert the sp test tape and play. B) connect the ch1 of the oscilloscope to the h/sw(w861, w...

  • Page 13

    3-4 vcr electrical troubleshooting guide 1. Power(smps) circuit no 5.3va. Replace f101. (use the same type) is f101 normal? Is r101 normal? Is bd101 normal? No no no no no no replace bd101. Replace r101. Is d102 normal? Check or replace d102. Replace d112. Replace ic103. Yes yes yes yes yes yes is v...

  • Page 14

    No -27va. Check or replace d108. (7) no -27va vcr electrical troubleshooting guide 3-5 no 5v. 5.3va line check. Is 5.3va put into q160 emitter? Is about 5v put into q160 base? Is q162 base “h”? No no no check the power control. Check or replace q162, r157, r158, r159, d121. Yes yes yes check or repl...

  • Page 15

    3-6 vcr electrical troubleshooting guide no 8v. Check or replace d110. Is vcc(13v) supplied to (+) terminal in d114? Is q162 base “h”? Is vcc(12v) supplied to ic151 pin1? No no check or replace d114. No check the power control. Yes yes check or replace ic151, r170, c154. Yes (8) no 8v(to dvd) no 3.3...

  • Page 16

    3-7 2. System/key circuit (1) auto stop (2) the unstable loading of a cassette tape auto stop does the sw30 waveform appear at ic501 pin18? Do the t-up reel pulses appear at ic501 pin80? Is 12v applied to pmc01 pin8? Check the drum motor signal. Does 5v appear at the rs501? Check the q160 power circ...

  • Page 17

    3-8 3. Servo circuit (1) unstable video in pb mode does the noise level of the screen change periodically? Do the ctl pulses appear at ic501 pin97? Is the height adjustment of the ctl head accurate? Readjust the height of the ctl head. Replace ic501. Refer to “when the y signal doesn’t appear on the...

  • Page 18

    3-9 does the cfg signal appear at pmc01 pin1? Does the pwm signal appear at ic501 pin77? Does 2.8v appear at pmc01? Check the pmc01 and the capstan motor ass’y. Does the capstan pwm signal appear at ic501 pin77? Are the foil patterns and components between ic501 pin77 and pmc01 pin9 shorted? Does th...

  • Page 19

    3-10 4. Osd circuit (1) no osd display. (2) i 2 c bus check keys do not work is 5v applied to ic501 pin79? Does led or fld change when a function button is pressed? No osd or f.Osd display. Is 5.3v applied to ic501 pin53? Does oscillation occur at ic501 pins44, 45? Replace ic501. No i 2 c bus commun...

  • Page 20

    3-11 5. Y/c circuit (1) no video in ee mode, no video in ee mode does the video signal appear at ic302 pins1, 5? Is there 5v at ic302 pin6? Check the reg 5v line. (power circuit) replace ic302. Does the video signal appear at ic301 pins28, 30, 32? Is reg 5.0v applied to ic301pins23, 44, 45, 52, 68, ...

  • Page 21

    3-12 3. Y/c circuit (2) when the y(luminance) signal doesn’t appear on the screen in pb mode, is 5v applied to ic301 pins23, 44, 45, 52, 68, 77? Is the y/c bus siganl applied to ic301 pins53, 54, 55? Does the normal rf signal appear at ic301 pin 14? Check the line of the reg 5v line. (power circuit)...

  • Page 22

    3-13 3. Y/c circuit (3) when the c(color) signal doesn’t appear on the screen in pb mode, is 5v applied to ic301 pins23, 44, 45, 52, 68, 77? Does the color signal appear at ic301 pins41, 50? Check the line of the reg 5v line. (power circuit) replace x301. Check c342, c341, r333. Is x301 (3.58mhz) no...

  • Page 23

    3-14 3. Y/c circuit (4) when the video signal doesn’t appear on the screen in rec mode, yes yes no no yes yes yes yes yes check system part (v.H/sw) replace the ic301. Check the drum *option pins72, 73, 74(sp) pins65, 66, 67(ep) rec mode check the ee mode no is ee mode normal? Is color normal? A a y...

  • Page 24

    3-15 6. Hi-fi circuit (1) no sound(ee mode) no sound. Check the sif.In of ic801 pins57. Check the dvd audio of ic801 pins12, 74. Check the av1 audio of ic801 pins11, 73. Check the av2 audio of ic801 pins9, 71. Check the vcc of ic801 pins3, 5, 15, 32, 36, 46, 54. Yes check the iic clock and data at i...

  • Page 25

    3-16 3. Y/c circuit (2) hi-fi playback yes yes yes no sound. Check the vcc of ic801 (pins3, 5, 15, 32, 36, 46, 54). Check the hi-fi selection switch. (ic801 pin39) and the tape quality. Is the rf envelope at ic801 pin23 over 3vp-p? Yes check ic801 pin37(data), pin38(clock) yes do audio signals appea...

  • Page 26

    3-17 (3) hi-fi rec no recorded hi-fi audio signal check vcc of ic801. (pins3, 5, 15, 32, 36, 46, 54) check ic801 pin37(data), pin38(clock). Yes do audio signals appear at ic801 pin6? Yes do audio signals appear at ic301 pin76(normal audio)? Yes do osc signals appear at p3d02 pins4,5 (50vp-p) yes yes...

  • Page 27

    3-18 7. Tuner/if circuit (1) no picture on the tv screen no picture on the tv screen does the video signal appear at tu701 pin16. Yes yes is +33v applied to tu701 pin14? Yes is +5v applied to tu701 pin3? No does the video signal appear at ic302 pin7. No does the video signal appear at ic501 pin 52. ...

  • Page 28

    3-19 (2) no sound no sound. Check the vcc of tu701 pins3, 14. Check 5.2v, 33v line. No check the tuner sif signal at ic801 pin57. Yes check the audio of ic801 pins78, 80. Yes check the signal flow from ic801 pins78, 80 to jk601 audio out(l), (r) yes check the tuner sif of tu701 pin13. No 1. Check th...

  • Page 29

    4 3 1 2 to cap mot 12va to sys -27va to sys fd(+) to sys fd(-) to drum mot 12va to dvd/hi-fi reg 12v to dvd 8v to dvd 3.3v to tuner 33v to sys/hi-fi/tu 5.0v to dvd 5v from µ-com pwr ctl 'h' to sys/hi-fi/tu 5.3va drive & s/w block over current limit block (ic101,bd01,d102,r105, c108,r107,c107,c109) l...

  • Page 30

    5.3v a 5.0v gnd cap vcc reg 12v 33v drum vcc pwr ctl 'h' gnd hsr 'h' gnd gnd fd(-) fd(+) -27v a pmp01-ppm01 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 a.In ch s/w reg 5v control v .In rf agc nc enable clock d ata aft a.Out sif tu 30v nc v .Out 999 gnd 83 pwr ctl 'h' 81 hsr 'h' 1 1 0 fd(-) 109 fd(+) 108 -27...

  • Page 31

    3-24 3-25 3. Y/c block diagram ep pb 'a' ep pb 'b' sp pb 'b' sp pb 'a' 64 59 58 57 55 54 53 65 67 72 74 acc det env det c-rot rf-sw in y/c ena y/c da t a y/c clock v.Out audio mute ha sw p p p c-lpf main conv 3.58m bpf2 acc amp acc det clamp y lpf clamp clamp in out vca ccd 3.58m bpf1 y/c mix 6db do...

  • Page 32

    3-26 3-27 4. Normal audio block diagram ic301 la71206m sif a_in rf_mod ic801 la72670m tuner tu701 10 76 det normal audio out line audio(r) in line audio(l) in rear jack a. Out (l) alc 4 6 13 1 57 9 2 71 80 78 a. Out (r) (system) ic801 la72670m ic301 la71206m amp eq amp 78 4 10 a. Out (r) mod. Out da...

  • Page 33

    A b hi-fi/ rec ic801 la72670m a.Out to jack modulator a.Out (to tu) 24 hi-fi pb 'b' hi-fi pb 'a' hi-fi rec 57 12 74 11 73 9 71 6 4 26 27 80 a.Out 'l' a.Out 'r' 78 3 audio input block normal audio out(to avcp) normal audio in(from avcp) sif dvd a.In 'l' dvd a.In 'r' av1 a.In 'l' av1 a.In 'r' av2 a.In...

  • Page 34

    Gnd mode s1 mode s2 mode s3 mode s4 mode s/w to/from avcp t-up reel t-up end sup reel cst.Sw/rec tap 5v cs501 5.3va 5.3va es501 r550 ld501 deck ir led r553 r555 rs501 rs502 r556 r558 c582 r538 r535 r537 r536 c534 r544 c552 r5c6 c500 c517 r541 r529 r583 l512 ms501 x502 14mhz 32.768khz osc osc x501 1 ...

  • Page 35

    Notes) symbol denotes ac ground. Notes) symbol denotes dc chassis ground. Note) warning note) parts that are shaded are critical note) with respect to risk of fire or note) electricial shock. 3-32 3-33 circuit diagrams 1. Power(smps) circuit diagram switching error. Ic101 is defective. Switching err...

  • Page 36

    Pb rec 3-34 3-35 2. Tu/if circuit diagram.

  • Page 37

    3 1 1 7 8 9 1 4 5 2 6 pb y+c rec y+c waveform 3-36 3-37 3. A/v circuit diagram ic301 pin 59 is defective. Auto tracking has failed. Ic301 pin 57 is defective. Pb color signal does not appear. Ic301 pins 53, 54, 55 are defective. Ic301 doesn’t operate. Ic301 is defective. Pb color signal does not app...

  • Page 38

    Pb rec 100 100 t/w ktc3875 '02. 12. 04 r13734c 3-38 3-39 4. Hi-fi circuit diagram no hi fi audio 23 pin is defective. No audio ic801 pins37, 38 aredefective..

  • Page 39

    Only component option only svhs option 3-40 3-41 5. Jack circuit diagram.

  • Page 40

    1 3 4 8 5 6 7 2 waveform 0 r545 0 14 504 1k c542 680p mtz5.6b mtz5.6b 5 6 7 8 4 3 2 1 r502 100 72 71 99 r501 100 ic501 m37762 ic503 '02. 12. 04 r13732c from to jack eeprom 29 28 vcr lcd dvd led nc 3-42 3-43 6. System circuit diagram q501, q503 are defective. µ-com is unstable. Ic505 is defective. Vc...

  • Page 41

    3-44 3-45 7. Timer circuit diagram.

  • Page 42

    3-46 3-47 • waveforms * ic301 waveform ic301 pins 20, 21, 22 100mv/10msec div vv/ee 20 main de emphasis filter 21 main de emphasis out 22 clamp in ic301 pin 32 200mv/10msec div ee (video in) ic301 pin 41 100mv/0.2msec div rec/pb (2fsc) ic301 pin 25 1.0v/20msec div vv/ee (c-sync out) ic301 pin 49 100...

  • Page 43

    3-48 3-49 • circuit voltage chart ee play mode pin no. 2.3 2.29 2.29 2.29 2.31 2.3 0 2.31 2.31 2.25 4.93 1 0.97 1.92 1.55 0 2.37 2.39 0 2.46 1.73 3.07 4.96 0 0.36 1.83 1.47 2.25 2.32 2.25 4.08 2.25 3.62 2.97 3.13 2.37 2.35 0 1.82 0 0.83 2.34 0 4.92 4.95 2.27 3.31 3.32 3.94 2.54 2.12 4.95 4.75 4.7 2....

  • Page 44

    Location guide 3-50 3-51 printed circuit diagrams 1. Vcr p.C.Board.

  • Page 45

    3-52 3-53 2. Key 1(left) p.C.Board location guide 3. Key 2(right) p.C.Board location guide.

  • Page 46

    3-54 3-55 4. Power p.C.Board location guide notes) warning notes) parts that are shaded are critical notes) with respect to risk of fire or notes) electricial shock..

  • Page 47: Dvd Section

    3-56 electrical troubleshooting guide 1. System operation flow power on no yes yes yes no no no show logo tray closed? Tray close to closed position sled moves to inner position recieve open/ close key? Receive close key? 1. Stop playback & open tray 2. Display tray open message & logo 1. Execute pr...

  • Page 48

    3-57 2. Test & debug flow test check the power part no yes no yes no no no yes yes yes check the power part check the regulators or diode(d601). Check the cable connection. (pdv02) 1. Check 27mhz system clock. 2. Check systemreset circuit. 3. Check flash r/wenable signal prd, rwr. 4. Check rs232 sig...

  • Page 49

    3-58 a b reset or power on. Show logo? Flash memory operates properly? Check connection lines between flash & mt1379 and the flash access time whether is sui table or not. Sdram works properl y? Mt1379 video outputs properly? Have tv signal output? Check av cable connection to tv set . Check the loa...

  • Page 50

    3-59 b no yes ok yes yes no yes yes yes no yes no no no no does the sled move to inner side when it is at outer position? Motor driver stby pin is high? Motor driver stby pin is high? Sl+ and sl- output properly? Optical lens has movements for searching focus? Proper f+ & f- outputs? Check cable con...

  • Page 51

    3-60 c no no no no no no yes yes yes yes yes yes yes yes no no laser turns on when reading disc? Ld01 or ld02 output properly? Check the laser power circuit on mt1336 and connecting to power transistor. (q204, q205) check the related circuit on laser power transi stor check the related circuit on mt...

  • Page 52

    3-61 d yes yes no no yes yes yes yes yes yes yes no no no no no no focus on ok? Track on ok? Disc is play? E proper signals on a, b, c, d of mt1336 check connections between mt1336 and pick-up head. Proper feo signal on mt1336? Proper feo signal on mt1336? Check the related circuit on mt1336 feo sug...

  • Page 53

    3-62 e no yes yes yes no no normal audio output when disc playback? Test end audio dac received correct data stream? Normal audio dac out? (ic401) check audio filter, amplify, mute circuit. (ic402 application circuit)? Check connection between mt1379 & audio dac. (check vrst#, aclk, abck, asdat3) ch...

  • Page 54

    Details and waveforms on system test and debugging 1. System 27mhz clock,reset,flash r/w signal 1) mt1379 main clock is at 27mhz(x501) 3.8v, 27mhz fig 1-1 2) mt1379 & mt1336 reset is high active. Pwr_ctl(cn505 pin 7) 5.2va power cord in m_reset(cn505 pin 9) urst(ic501 pin 188) fig 1-2 3-63.

  • Page 55

    3-64 3) rs232 waveform during procedure(downloading) txd(j6 pin3) rxd(j6 pin 2) fig 1-3 4) flash r/w enable signal during download(downloading) frd(ic5a1 pin 28) fwr(ic5a1 pin 11) fig 1-4.

  • Page 56

    3-65 2. Sdram clock 1) mt1379 main clock is at 27mhz(x501) (ic502,ic503 pin 35) dclk = 93mhz, vp-p=2.2, vmax=2.7v fig 2-1 3. Tray open/close signal 1) tray open/close waveform open((cn203 pin 3) close(cn203 pin 2) tropen(ic202 pin 1) trclose(ic202 pin 2) fig 3-1.

  • Page 57

    3-66 2) tray close waveform open((cn203 pin 3) close(cn203 pin 2) tropen(ic202 pin 1) trclose(ic202 pin 2) fig 3-2 3) tray open waveform open((cn203 pin 3) close(cn203 pin 2) tropen(ic202 pin 1) trclose(ic202 pin 2) fig 3-3.

  • Page 58

    3-67 4. Sled control related signal (no disc condition) fmso(2.0v/1.4v/1.0v) (ic501 pin 19) stby(5v) – (ic201 pin 50) sl+(4.7v/3.6v/1.9v) (ic202 pin 12) sl-(5.3v/3.7v/2.5v) (ic202 pin 13) fig 4-1 5. Lens control related signal(no disc condition) foso(1.5v/1.4v/1.3v) (ic501 pin 12) f+(4.0v/3.6v/3.2v)...

  • Page 59

    3-68 6. Laser power control related signal(no disc condition) mdi1(0v/180mv) (ic201 pin 124) ld01(5.0v//3.5v) ic201 pin 125) ld02(5.0v/3.6v) (ic201 pin 126) fig 6-1 7. Disc type judgement waveforms f+(ic202 pin 9) fe(ic201 pin 18) rfl(ic201 pin 19) fig 7-1 (dvd).

  • Page 60

    3-69 f+(ic202 pin 9) fe(ic201 pin 18) rfl(ic201 pin 19) fig 7-2 (dvd) f+(ic202 pin 9) fe(ic201 pin 18) rfl(ic201 pin 19) fig 7-3 (cd).

  • Page 61

    3-70 f+(ic202 pin 9) fe(ic201 pin 18) rfl(ic201 pin 19) fig 7-4 (cd) 8. Focus on waveforms fe(ic201 pin 18) foso(ic501 pin12) f+(ic202 pin 9) f-(ic202 pin 8) fig 8-1 (dvd).

  • Page 62

    3-71 fe(ic201 pin 18) foso(ic501 pin12) f+(ic202 pin 9) f-(ic202 pin 8) fig 8-2 (cd) 9. Spindle control waveforms (no disc condition) dmso(1.4v/1.8v) (ic501 pin 18) sp-(3.6v/2.4v) (ic202 pin 10) sp+(3.6v/4.8v) (ic202 pin 11) fig 9-1.

  • Page 63

    3-72 10. Tracking control related signal(system checking) te(ic201 pin 21) trso(ic501 pin 13) t-(ic202 pin 7) t+(ic202 pin 6) fig 10-1(dvd) te(ic201 pin 21) trso(ic501 pin 13) t-(ic202 pin 7) t+(ic202 pin 6) fig 10-2(cd).

  • Page 64

    3-73 11. Rf waveform rfop(2.3v/1.1v) (ic201 pin 6) rfon(0.8v/2.0v) (ic201 pin 7) fig 11-1 12. Mt1379 audio optical and coaxial output (aspdif) (ic501 pin 153) fig 12-1.

  • Page 65

    3-74 13. Mt1379 video output waveforms 1) full colorbar signal(cvbs) (ic604 pin 23) fig 13-1 2) y (ic604 pin 21) fig 13-2.

  • Page 66

    3-75 3) c (ic604 pin 26) fig 13-3 14. Audio output from audio dac 1) audio l/r fig 14-1 (jk601 pin 4,5).

  • Page 67

    3-76 2) audio related signal asdat3(ic501 pin 157) abck(ic501 pin 148) alrck(ic501 pin 149) asdata3 fig 14-2.

  • Page 68: Block Diagrams

    3-77 block diagrams 1. Overall block diagram m m disc spindl e mo to r lo a d ing mo t o r deck mechanism dv d: rf 0 ,a ,b, c, d c d :r f0 ,a,b ,c ,d ,e, f pick up key in p u t b/pb ic5 a 1 29lv800t a -70 1m 8bit fl a s h rom urst a[00 :1 9] pc e# pr d # pw r # dq[00:15] rfon,r fop ,feo ,r f l ,cs o...

  • Page 69

    3-78 ic202 la6560 motor driver dvd: a,b,c,d, rfo cd: a,b,c,d, e, f,rfo sp+, sp - m/ d pick up x501 ic501 mt1379 dvdplayer combo chip ic201 mt1336e rf signa l processor foso,trso,fmso dmso,,tropen feo,teo,rfl,rfrp bdo,cso,htrc,v2p8 adi n f+, f-, t +, t - sl+ , sl - load+, load - 27m h z x- t a l rfop...

  • Page 70

    3-79 3. Mpeg & memory block diagram ic503 sdra m 16 m ic505 eepro m iic 501 (mpeg + dsp ) mt1379 ic5a 1 flash memory (8 m ) ic510 (74hct244 ) voltage level shift video int e rface audio int erface rf ic int erface front mi co m in te rfa c e (f r o n t b o a r d ) ic502 sdra m 16 m rfop,rfon,htrc,rf...

  • Page 71

    3-80 4. Video & audio block diagram ic5c1 video 6db am p ic401 audio dac (2ch) ic402 (op amp) lpf&buffer cvbs component (r.G.B) / (y.Pb.Pr ) super video (y/c) (r.G.B) / (y.Pb.Pr ) (y/c) dac reset aclk scl sd a interface mp eg mp eg audio ‘r ’ audio ‘r ’ adata3.

  • Page 73

    System not working or screen is abnormal no power on no video signal. Video signal y video signal color digitron will not display system not working program download fail 3-81 3-82 circuit diagrams 1. System circuit diagram.

  • Page 74

    No cd/dvd ld 3-83 3-84 2. Rf & dsp servo circuit diagram.

  • Page 75

    3-85 3-86 3. Audio circuit diagram.

  • Page 76

    3-87 3-88 4. Av/jack circuit diagram.

  • Page 77

    3-89 3-90 • circuit voltage chart pin stop play stop play stop play stop play stop play stop play 1 1.03 2.99 0 0 1.22 1.22 3.27 3.28 0 0 0 0 2 5.11 5.08 0 0 0 0 1.18 1.26 0 0 2.59 2.55 3 0 0 8.04 8.01 0.96 0.9 1.1 1.52 0 0 0 0 4 0 0 0.12 0.06 2 2.06 0 0 0 0 2.59 2.56 5 5.11 5.07 0 0.06 0 1.51 0.66 ...

  • Page 78

    3-91 3-92 pin stop play stop play stop play stop play stop play stop play 161 0 1.27 162 0 2.35 163 0 0 164 0 0.73 165 0 3.27 166 0 0.5 167 0 0 168 0 0.53 169 0 3.27 170 0 0.59 171 0 0 172 3.01 0.72 173 0 0.72 174 0 0 175 0 2.73 176 0 3.13 177 0 3.13 178 0 3.25 179 0 0 180 0 0 181 2.04 2.64 182 0 2....

  • Page 79

    Location guide 3-93 3-94 printed circuit diagrams 1. Mtr p.C.Board.

  • Page 81: Contents

    Deck mechanism parts locations • top view . . . . . . . . . . . . . . . . . . . . . . . . .4-1 • bottom view . . . . . . . . . . . . . . . . . . . . . . .4-1 deck mechanism disassembly 1. Drum assembly . . . . . . . . . . . . . . . . . . .4-2 2. Top plate assembly . . . . . . . . . . . . . . . .4-4 ...

  • Page 82

    Deck mechanism parts locations 4-1 4 6 3 2 7 9 5 11 18 16 19 17 19 12 13 15 10 1 31 14 8 15 33 • top view • bottom view 20 24 23 20 24 22 21 29 30 29 30 25 32 27 26 28 note: when reassembly perform the procedure in the reverse order. 1 drum assembly 3 screw a-1 t 2 top plate assembly 2 hook a-2 t 2 ...

  • Page 83: Deck Mechanism Disassembly

    4-2 deck mechanism disassembly (s3) (s2) (s2) (s3) (a) stator carbon brush drum motor rotor drum sub assembly fpc drum (s1) (s1) (s1) fpc holder h1 h2 1. Drum assembly (fig. A-1-1) 1) unplug the fpc drum connector. 2) remove three screws (s1) on the bottom side and sep- arate the drum assembly. 3) u...

  • Page 84: Deck Mechanism Disassembly

    Deck mechanism disassembly 4-3 (b) (e) (c1) (c) top plate f/l arm assembly s/w spring lever f/l gear rack assembly chassis door opener l/d motor bracket assembly cst holder assembly (b') (c') (d) (e') (h6) (a) (b) s/w lever assembly (h8) fig. A-2 (fig. A-2-1) (fig. A-2-2) (fig. A-2-6) (fig. A-2-7) (...

  • Page 85: Deck Mechanism Disassembly

    4-4 deck mechanism disassembly 2. Top plate assembly (fig. A-2-1) 1) pull the (b) portion of the top plate back in direction of arrow and separate the right side of it. 2) pull the (b’) portion of the top plate back in direction of arrow and separate the left side of it. (tools: (-) flat type screwd...

  • Page 86: Deck Mechanism Disassembly

    Deck mechanism disassembly 4-5 9. Cleaner arm assembly (fig. A-3-1) 1) carefully pry tab "a" (see fig.A-3-1) to clear the embossed tab on the chassis. Turn the cleaner arm assembly clockwise and lift it from the chassis. 10. F/e head (fig. A-3-2) 1) carefully pry tab "a" (see fig.A-3-2) to clear the...

  • Page 87: Deck Mechanism Disassembly

    4-6 deck mechanism disassembly t brake assembly tb spring (h9) t reel rs brake assembly rs spring tension arm assembly tension spring s reel tension base (h11) (h12) chassis (h10) fig. A-4 12. T brake assembly (fig. A-4-1) 1) unhook the tb spring from the hook (h9) of the chassis. 2) llift the t bra...

  • Page 88: Deck Mechanism Disassembly

    Deck mechanism disassembly 4-7 lid opener pinch arm assembly p4 base assembly t/up arm t/up lever (a) (b) (c) (c) (h13) (b) (h13) chassis fig. A-5 16. P4 base assembly (fig. A-5-1) 1) carefully pry the (a) portion of the p4 base assembly from the embossing of the chassis. 2) turn the p4 base assembl...

  • Page 89: Deck Mechanism Disassembly

    4-8 deck mechanism disassembly chassis (s5) capstan belt capstan motor washer(w1) f/r lever d35 clutch assembly capstan brake assembly (l1) (l2) (l1) fig. A-6 20. Capstan belt (fig. A-6-1)/ capstan motor (fig. A-6-2) 1) remove the capstan belt.. 2) remove the three screws (s5) from the bottom of the...

  • Page 90: Deck Mechanism Disassembly

    Deck mechanism disassembly 4-9 drive gear washer (w2) cam gear slider plate tension lever spring lever loading base sector gear (l3) (h15) (h16) (h14) (a) chassis drive gear hole(c) cam gear hole(b) drive gear hole(a) fig. A-7 24. Drive gear (fig. A-7-1)/ cam gear (fig. A-7-2) 1) remove the washer (...

  • Page 91: Deck Mechanism Disassembly

    4-10 deck mechanism disassembly p3 gear assembly p2 gear assembly p2 base assembly p3 base assembly (a) (b) chassis p2 gear assembly hole sector gear hole(a) slider plate hole(b) spring lever boss p3 gear assembly hole fig. A-8 29. P2 gear assembly (fig. A-8-1)/ p3 gear assembly (fig. A-8-2)/ 1) lif...

  • Page 92: Deck Mechanism Disassembly

    Deck mechanism disassembly 4-11 (a) (b) (c) (s7) idler arm jog assembly loading base tension base chassis (d) fig. A-9 31. Loading base (fig. A-9-1) 1) remove the screw (s7). 2) lift the loading base up. 32. Tension base (fig. A-9-2) 1) remove the (a) portion of the tension base from the embossing o...

  • Page 93: Deck Mechanism Disassembly

    Deck mechanism disassembly 4-12 • tools and fixfures for service 1. Cassette torque meter srk-vht-303 (not svc part) part no: d00-d006 4. Torque gauge adaptor part no:d09-r001 5. Post height adjusting driver part no:dtl-0005 6. + type driver (ø 5) 2. Alignment tape part no ntsc: dtn-001 pal:dtn-0002...

  • Page 94: Deck Mechanism Adjustment

    Deck mechanism adjustment 4-13 purpose:to determine if the mechanism is in the correct position, when a tape is ejected. 1. Mechanism alignment position check 1) turn the power s/w on and eject the cassette by press- ing the eject button. 2) remove the top cover and top plate assembly, visual- ly ch...

  • Page 95: Deck Mechanism Adjustment

    4-14 deck mechanism adjustment purpose: to insure smooth transport of the tape during each mode of operation. If the tape transport is abnormal, then check the torque as indicated by the chart below. 2. Preparation for adjustment (to set the deck mechanism to the loading state without inserting a ca...

  • Page 96: Deck Mechanism Adjustment

    Deck mechanism adjustment 4-15 4.Guide roller height adjustment adjustment procedure 1) confirm that the tape runs along the tape guide line of the lower drum. 2) if the tape runs at the bottom of the guide line, turn the guide roller height adjustment screw clockwise. 3) if it runs at the top, turn...

  • Page 97: Deck Mechanism Adjustment

    4-16 deck mechanism adjustment 5. Audio/control (a/c) head adjustment 10.9 purpose: to insure that the tape's audio and control tracks pass accurately over the head in exact alignment in both the record and playback modes. Test equipment/ fixture • blank tape • screw driver (+) type 5mm • play the b...

  • Page 98: Deck Mechanism Adjustment

    Deck mechanism adjustment 4-17 purpose: to obtain compatibility with other vcr (vcp) models. 5-2. Confirm that the tape passes smoothly between the take-up guide and pinch roller (using a mirror or the naked eye). 1) after completing step 5-1. (preliminary adjustment), check that the tape passes aro...

  • Page 99: Deck Mechanism Adjustment

    4-18 deck mechanism adjustment purpose: to correct for shift in the roller guide and x value after replacing the drum. 8-2. Check for tape curling or jamming test equipment/ fixture • t-160 tape • t-120 tape specification • be sure there is no tape jamming or curling at the begining, middle or end o...

  • Page 100

    Maintenance/inspection procedure 4-19 (3) f/e head (5) drum assembly (video head) (4) p2 base assembly (2) tension post (1) supply reel (6) p3 base assembly the following faults can be remedied by cleaning and oil- ing. Check the needed lubrication and the conditions of cleanliness in the unit. Chec...

  • Page 101

    Maintenance/inspection procedure 4-20 the recording density of a vcr (vcp) is much higher than that of an audio tape recorder. Vcr (vcp) components must be very precise, at tolerances of 1/1000mm, to ensure com- patiblity with other vcrs. If any of these components are worn or dirty, the symptoms wi...

  • Page 102

    Maintenance/inspection procedure 4-21 (1) greasing guidelines apply grease, with a cleaning patch. Do not use excess grease. It may come into contact with the tape path or drive system. If this occurs wipe off any excess and clean with cleaning patch using isopropyl alcohol. (2) periodic greasing gr...

  • Page 103

    4-22 gear , f/r gear ay, p2 & p3 f/r lever tension base boss cam.

  • Page 104

    Mechanism troubleshooting guide 4-23 is the supply to the end sensor end sensor "h"? “h”: more than 3.5v “l”: less than 0.7v~1v is the voltage across ir led between 0.8~1.5v? Replace led. Is the vcc. Voltage of end sensor 5v? Check the syscon power. Replace end sensor. Check syscon circuit. No yes y...

  • Page 105

    4-24 mechanism troubleshooting guide are there t/up and supply reel pulses. In play/cue/rev is the pinch roller in contact with the capstan shaft. Replace reel sensor. Is the output of dfg, dpg ok? Check aligment positions (page 4- 14) check pinch spring. Replace drum motor. Check servo, syscon. Che...

  • Page 106

    4-25 mechanism troubleshooting guide is the pinch roller attached to the capstan motor shaft? Check alignment positions (page 4-14) does the t/up reel turn? Replace the belt. Is the belt ok? Does the drum motor turn? Check dpg and dfg pulses check t/up 2nd supply reel sensors check syscon, circuit. ...

  • Page 107

    Mechanism troubleshooting guide 4-26 does the lever assembly switch work? Is the lever assembly switch spring damaged or omitted? Does the cst in switch work normally? Replace or add the lever assembly switch spring. Is the vcc of main p.C.Board 5v? Yes yes check syscon circuit. Yes check power circ...

  • Page 108

    Mechanism troubleshooting guide 4-27 does the cst insert? Does the opener lid work? Is the door opener assembled correctly? Replace the lid opener. Replace the f/l arm assembly. Check the power of l/d motor. Is the cassette holder assembly assembled correctly? Replace the f/l rear rack. Does the f/l...

  • Page 109: Exploded Views

    4-28 exploded views 11 7 103 105 11 7 100 106 107 a21 11 4 11 3 11 2 11 0 11 5 a24 11 6 102 a23 032 a22 109 054 054a 100a 100b 1. Front loading mechanism section.

  • Page 110: Exploded Views

    Exploded views 4-29 401 402 001 008 011 031 079 017 032 024 406 020 021 028 019 018 029 030 026 a03 a04 a01 002 002a 025 027 022 003 004 006 007 010 405 014 015 009 409 013 023 016 405 012 402 optional part 2. Moving mechanism section (1).

  • Page 111: Exploded Views

    Exploded views 4-30 051 052 517 061 056 058 518 052a 055 060 410 070 069 076 032 077 068 064 066 065 067 a11 078 a12 optional part 3. Moving mechanism section (2).

  • Page 112: Memo

    Memo.

  • Page 113: Contents

    Deck mechanism parts locations • top view..................................................5-1 • top view(without tray disc) .................5-1 • bottom view ...........................................5-1 deck mechanism disassembly 1. Holder clamp....................................5-2 1-1. Clamp ...

  • Page 114

    5-1 deck mechanism parts location starting no. 1 1, 2 1, 2, 3 1, 2, 3, 4 1 1, 6 1, 2, 6 1, 2, 6, 8 1, 2, 6, 8, 9 1, 2, 7 1, 2, 7 1, 2 1, 2 ,13 1, 2, 13, 14 1, 2, 7, 12, 13, 14 1, 2, 13 1, 2, 7, 12, 13, 14, 15, 16, 17 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 holder clamp clamp assembly disc plate...

  • Page 115: Deck Mechanism Disassembly

    5-2 deck mechanism disassembly 1. Holder clamp (fig. 5-1) 1) release 2 screws(s1). 2) unhook 2 locking tabs(l1). 3) lift up the holder clamp and then separate it from the base main. 1-1. Clamp assembly disc 1) place the clamp assembly disc as fig. (a) 2) lift up the clamp assembly disc in direction ...

  • Page 116: Deck Mechanism Disassembly

    5-3 deck mechanism disassembly 3. Base assembly sled (fig. 5-3) 1) release 4 screw(s2). 2) disconnect the ffc connector(c1) 3-1. Gear assembly feed 3-2. Gear middle 3-3. Gear assembly rack 1) release the scerw(s3) 4. Rubber rear (fig. 5-3) fig. 5-3.

  • Page 117: Deck Mechanism Disassembly

    5-4 deck mechanism disassembly 5. Frame assembly up/down (fig. 5-4) put the base main face down(bottom side) 1) release the screw(s4) 2) unlock the locking tab(l3) in direction of arrow and then lift up the frame assembly up/down to separate it from the base main. • when reassembling move the guide ...

  • Page 119

    Exploded views 1. Deck mechanism exploded view 429 429 026 010 018 013 014 017 015 015a 011 430 431 011a 012 004 001 002 003 a01 a02 020 430 430 430 430 012 021 433 433 012 012 028 022 432 024 a03 a26 025 030 015b 015c 435 029 031 431 431 431 024a 024a 024b 5-5 5-6.

  • Page 121

    6-1 section 6 replacement parts list model : xbv323(vc641mk) ha1uzz(zenith) nsp : not avallable as service parts. Run date :04-july-03 s al loca. No. Lg part no. Description specification remarks *** individual parts *** 250 3110r-v004f case vc672pk na3gosb press lv081(b 260 3210r-v002a frame combi-...

  • Page 122

    6-2 s al loca. No. Lg part no. Description specification remarks 022 4681r-0038b motor assembly deck/mecha feed dp-7c (sh) cnt 024 4470r-0131a gear pinion dp7c 024b 5006r-0043a cap skew dp7c 025 4470r-0130a gear middle dp7c 026 3390r-0014a tray disk 028 4370r-0082b shaft deck/mecha pu r dp-7c other ...

  • Page 123

    6-3 s al loca. No. Lg part no. Description specification remarks c342 0ce1054k638 capacitor,electrolytic 1.0m sra/ss50v m fm5 tp(5) c343 0ch1223k516 capa,chip ceramic m/l h.D f/s 0.022u 50v k b 2.0x1.2 r/tp c344 0ce1054k638 capacitor,electrolytic 1.0m sra/ss50v m fm5 tp(5) c346 0ce4764f638 capacitor...

  • Page 124

    6-4 s al loca. No. Lg part no. Description specification remarks c590 0ch1105f946 capacitor,chip[ceramic m/l hd 1uf 16v z y5v(f) 2012 r/tp c592 0ce1064f638 capacitor,electrolytic 10m sra 16v m fm5 tp(5) c593 0ch4471k416 capa,chip ceramic m/l t.C f/s 470p 50v j 2.0*1.25 r/tp c594 0ch1104k946 capacito...

  • Page 125

    6-5 s al loca. No. Lg part no. Description specification remarks c844 0ch1472k516 capa,chip ceramic m/l h.D f/s 4700p 50v k b 2.0*1.25 r/tp c845 0ch1103k516 chip capa ceramic m/l h.D f/s 0.01u 50v k b 2.0x1.25 r/tp c846 0ce4754k638 capacitor,fixed electrolytic 4.7uf sra,ss 50v 20% fm5 tp 5 c847 0ce1...

  • Page 126

    6-6 s al loca. No. Lg part no. Description specification remarks ms501 6600jb8005c switch,mode mms00721zmb0 mic 5vdc 1ma d-35 ms501 6600jb8005b switch,mode non 5v 1ma vertical -g q301 0tr150409ac transistor kta1504-gr-t1(asg) chip kec q302 0tr387509ac transistor chip ktc3875s-gr-t1(alg) kec q303 0tr...

  • Page 127

    6-7 s al loca. No. Lg part no. Description specification remarks r340 0rh1501d622 resistor,metal glazed(chip) 1.5k ohm 1 / 10 w 2012 5.00% d r341 0rh1000d622 resistor,metal glazed(chip) 100 ohm 1 / 10 w 2012 5.00% d r342 0rh4700d622 resistor,metal glazed(chip) 470 ohm 1 / 10 w 2012 5.00% d r344 0rh1...

  • Page 128

    6-8 s al loca. No. Lg part no. Description specification remarks r558 0rh2202d622 resistor,metal glazed(chip) 22k ohm 1 / 10 w 2012 5.00% d r563 0rh4701d622 resistor,metal glazed(chip) 4.7k ohm 1 / 10 w 2012 5.00% d r564 0rh2702d622 resistor,metal glazed(chip) 27k ohm 1 / 10 w 2012 5.00% d r566 0rh2...

  • Page 129

    6-9 s al loca. No. Lg part no. Description specification remarks r814 0rh7501d622 resistor,metal glazed(chip) 7.5k ohm 1 / 10 w 2012 5.00% d r817 0rh1502d622 resistor,metal glazed(chip) 15k ohm 1 / 10 w 2012 5.00% d r818 0rh4701d622 resistor,metal glazed(chip) 4.7k ohm 1 / 10 w 2012 5.00% d r821 0rh...

  • Page 130

    6-10 s al loca. No. Lg part no. Description specification remarks r616 0rd3301f608 resistor,fixed carbon film 3.3k ohm 1/6 w 5% ta26 r617 0rd4701f608 resistor,fixed carbon film 4.7k ohm 1/6 w 5% ta26 r621 0rd2701f608 resistor,fixed carbon film 2.7k ohm 1/6 w 5% ta26 r622 0rd1501f608 resistor,fixed c...

  • Page 131

    6-11 s al loca. No. Lg part no. Description specification remarks c131 624-082h capacitor ce 1000uf/10v shl(10*12.5)t/p c132 624-085d capacitor ce 47uf/50v kme (smps) c133 0cq1042k409 capacitor,fixed film 0.1uf s 50v j pe tp c151 0ce4754k638 capacitor,fixed electrolytic 4.7uf sra,ss 50v 20% fm5 tp 5...

  • Page 132

    6-12 s al loca. No. Lg part no. Description specification remarks r154 0rd1001f608 resistor,fixed carbon film 1k ohm 1/6 w 5% ta26 r155 0rd1802f608 resistor,fixed carbon film 18k ohm 1/6 w 5% ta26 r156 0rd1002f608 resistor,fixed carbon film 10k ohm 1/6 w 5% ta26 r157 0rd1001f608 resistor,fixed carbo...

  • Page 133

    6-13 s al loca. No. Lg part no. Description specification remarks 029 4261r-0019c arm assembly deck/mecha pinch 029 4261r-0019b arm assembly pinch 029 4261r-0019a arm assembly deck/mecha pinch 029 4261r-0019d arm assembly deck/mecha pinch 030 4510r-0043a lever t/up 031 4970r-0123a spring coil tensio...

  • Page 134

    6-14 s al loca. No. Lg part no. Description specification remarks *** sub pwb(pcb) assembly(dvd) *** a46a 6885r-2202c sub pwb(pcb) assembly 55530045140560 000000c0 081810 c201 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp c202 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf ...

  • Page 135

    6-15 s al loca. No. Lg part no. Description specification remarks c297 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp c298 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp c401 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp c402 0...

  • Page 136

    6-16 s al loca. No. Lg part no. Description specification remarks c534 0ch4330k412 capacitor,chip[ceramic m/l tc 33p 50v j cog 1.6x0.8 r/tp c535 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp c536 0ch1102k562 capacitor,fixed ceramic(temp.C 1000pf 50v 10% x7r(x) 1608 r/t c537 ...

  • Page 137

    6-17 s al loca. No. Lg part no. Description specification remarks c605 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp c606 0ch1104k942 capacitor,chip[ceramic m/l hd 0.1uf 50v z y5v(f) 1508 r/tp d401 0dsrm00118a diode,switching dap202k t146 rohm r/tp smd 80v d601 0dr104009ba d...

  • Page 138

    6-18 s al loca. No. Lg part no. Description specification remarks r205 0rh0272c622 resistor,metal glazed(chip) 27 ohm 1 / 16 w 1608 5.00% d r206 0rh0272c622 resistor,metal glazed(chip) 27 ohm 1 / 16 w 1608 5.00% d r207 0rh0000c622 resistor,metal glazed(chip) 0 ohm 1 / 16 w 1608 5.00% d r208 0rh0000c...

  • Page 139

    6-19 s al loca. No. Lg part no. Description specification remarks r419 0rh8201c622 resistor,metal glazed(chip) 8.2k ohm 1 / 16 w 1608 5.00% d r420 0rh1801c622 resistor,metal glazed(chip) 1.8k ohm 1 / 16 w 1608 5.00% d r421 0rh3300c622 resistor,metal glazed(chip) 330 ohm 1 / 16 w 1608 5.00% d r422 0r...

  • Page 140

    6-20 s al loca. No. Lg part no. Description specification remarks r5c3 0rh1500c422 resistor,metal glazed(chip) 150 ohm 1 / 16 w 1608 1.00% d r5c4 0rh1500c422 resistor,metal glazed(chip) 150 ohm 1 / 16 w 1608 1.00% d r5c5 0rh1500c422 resistor,metal glazed(chip) 150 ohm 1 / 16 w 1608 1.00% d r5c6 0rh1...