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jvc hr-s9600

Discussion in 'Electronic Repair' started by 1, Apr 3, 2005.

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  1. 1

    1 Guest

    This machine shuts down after a few seconds, it threads in allright but goes
    in standby after that.

    What could be the cause?

    Herm.
     
  2. John

    John Guest

    Faulty mode switch or no take up rotation, does it give an error code or
    does it still do it if you instantly put into pause?
    John.
     
  3. JVC Dude

    JVC Dude Guest

    probably the gears on the dynamic drum head tilt assy that has split. you
    usually get a knocking noise as the worm tries to turn it.
    not available seperately however....

    AW
     
  4. 1

    1 Guest

    It gives no error code, mode switch, well i gues is allright, take up
    rotation is also allright, i cant go in pause mode, just switches off.

    Herm.
     
  5. 1

    1 Guest

    Well, i think thats the prob, but no splitted gears, a slipping worm,
    however how can allign this assy??

    Herm.
     
  6. JVC Dude

    JVC Dude Guest

    Theres no explanation in the manuals on how to time these gears.!!! As I
    said before you can't buy them... only a complete head assembly which here
    in the UK is £150 or so last time I checked.
    You can usually remove the motor/worm/pcb safely to check without upsetting
    the timing, however its not these gears that usually split, its the 2 drive
    gears up into the head assembly with metal shafts.

    as to timing these 2 / 4 gears I've no info on that ! just pot luck
    really, since its a dynamic system as long as theres enough movement
    end-end it should be ok, since its the head 'envelope' that the electronics
    look at to check correct alignment.

    Upon initial power on, the micro moves the motor/worm/blades back/forward to
    check that theres movement. only if this is ok will the unit come out of
    standby. Then if you need any other mode than play, ie shuttle /pause
    the motor moves again, counting pulses on th e photo interrupter. Since
    pause/slow-mo is a different movement to shuttle , whichever damaged gear
    jams, that will then cause an error to be detected - and shut down or stop
    occurs.

    I have a customers machine (9500) sat here, which I need to arrange to
    somehow bypass these broken gears with..
    (Thinking aloud...)Perhaps if the motor is allowed to spin whilst
    disconnected from the gears.....it would not detect an error..... still
    picture and shuttle picture wouldn't be perfect but at least record/play
    would work....

    hope that helps

    Andrew
     
  7. Asimov

    Asimov Guest

    "JVC Dude" bravely wrote to "All" (05 Apr 05 09:25:41)
    --- on the heady topic of "Re: jvc hr-s9600"

    The simplest method to time these is to (with power plug pulled)
    remove the basket, then turn the loading mechanism by hand until the
    load arms would just stop retracting the tape. This is the STOP
    position. Then align all the gears so that the basket can be mounted
    in the down position. When the machine is then powered up it should
    reset itself to the tape eject position. This method should work in
    99% of all machines.

    A*s*i*m*o*v


    JD> From: "JVC Dude" <>
    JD> Xref: aeinews sci.electronics.repair:44983

    JD> Theres no explanation in the manuals on how to time these gears.!!! As
    JD> I said before you can't buy them... only a complete head assembly which
    JD> here in the UK is #150 or so last time I checked.
    JD> You can usually remove the motor/worm/pcb safely to check without
    JD> upsetting the timing, however its not these gears that usually split,
    JD> its the 2 drive gears up into the head assembly with metal shafts.

    JD> as to timing these 2 / 4 gears I've no info on that ! just pot
    JD> luck really, since its a dynamic system as long as theres enough
    JD> movement end-end it should be ok, since its the head 'envelope' that
    JD> the electronics look at to check correct alignment.

    JD> Upon initial power on, the micro moves the motor/worm/blades
    JD> back/forward to check that theres movement. only if this is ok will
    JD> the unit come out of standby. Then if you need any other mode than
    JD> play, ie shuttle /pause the motor moves again, counting pulses on th
    JD> e photo interrupter. Since pause/slow-mo is a different movement to
    JD> shuttle , whichever damaged gear jams, that will then cause an error to
    JD> be detected - and shut down or stop occurs.

    JD> I have a customers machine (9500) sat here, which I need to arrange to
    JD> somehow bypass these broken gears with..
    JD> (Thinking aloud...)Perhaps if the motor is allowed to spin whilst
    JD> disconnected from the gears.....it would not detect an error.....
    JD> still picture and shuttle picture wouldn't be perfect but at least
    JD> record/play would work....

    JD> hope that helps

    JD> Andrew

    .... The first rule of intelligent tinkering is to save all the parts.
     
  8. 1

    1 Guest

    Thanks Andrew,thanks a lot, however, i messed up the alligment real bad
    :(( and it's very difficult to get them right, i have a picture allright but
    nog optimal. Thanks.

    Herm.
     
  9. 1

    1 Guest

    This would discribe the threading alligment?? Correct me if i am wrong.

    Herm.
     
  10. Asimov

    Asimov Guest

    "1" bravely wrote to "All" (07 Apr 05 10:21:04)
    --- on the heady topic of "Re: jvc hr-s9600"

    1> From: "1" <[email protected]>
    1> Xref: aeinews sci.electronics.repair:45184

    1> This would discribe the threading alligment?? Correct me if i am
    1> wrong.

    Herm, alignment is relative to each vcr model. Some are simpler to
    reset the gears than others. Most have some sort of cam which controls
    the tape loading arms but which also relates to the basket gears. What
    often happens is the relationship between the tape load arms and
    basket position is accidentally upset for various reasons, i.e. jammed
    tape, forced loading or removal, broken parts, etc, resulting in
    slipped of skipped gears.

    A*s*i*m*o*v

    .... [] <- Please write your complaint legibly in that box.
     
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