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Saturday, 15 November 2014

Mitsubishi HS-M60V repair.



The venerable workshop VHS machine has finally given up after many years of sterling service. It doesn't make it into play or record. It'll be the loading belt, a small, rubber drive belt that's used to move the components of the mechanism into it's various modes. Why do I want to repair it? Because:
1) I can.
2) It's better repaired than in landfill. I hate to see stuff thrown out.
3) Because this machine is very good at recording and playing back system A video.

Thankfully a new belt kit is obtained from the lovely people at www.notobsolete.co.uk

As per usual, unplug the machine from the mains. Don't argue, do it.

There are two screws on the left and right sides of the top cover. Undo them and remove the top.

Grasp the joggly shuttler thing, and pull it off.











There.... put it safely to one side.
Undo the plastic catches holding the front panel on. Three on the top, two on the sides....








... and three across the bottom....
With a bit of jiggling, the front panel will now come off.



















Put the machine on it's side.
Remove the three screws,. indicated with arrows stamped into the base plate, I've circled them in the photo.  Put the machine back on it's feet.

















We now need to remove the deck. It's held in with 5 screws...









Two down the holes conveniently positioned on the cassette housing (the bit that loads the cassette onto the deck)



One to the rear right hand side of the deck...









One on the rear left...











... and one in the middle by the head amplifier.


While you're there, unplug the cable to the top of the head amplifier....

 ... and the one to the right of the cassette housing, which connects the end sensor..










You should now be able to remove the deck from the main board and case etc ... Just grab it by the cassette housing and gently pull...










Flip the deck over....

The big belt from the capstan motor to the reel drive gear is easy to get at, so replace it now, whilst we've got the machine apart.


The loading belt is located as shown by the arrow in the picture to the right. The shaft that the belt drives (the bit with the little fan on) is only held in position by the force of the belt and a small black plastic clip. Now we could disassemble the entire loading gear and gain easy access to the motor, belt and shaft, but then be faced with a re-alignment job... nah. Careful use of some small, needle nose pliers, and the belt can be worked out from around the shaft!

... and there's some access to the loading motor spindle from the top of the deck too...










The old loading belt had lost it's tension, and wasn't exactly round anymore....








Fit the new belt, Reassemble the machine, making sure to reconnect the end sensor cable, and supply to the head amp. When refitting the deck, check the large multipin connectors under the head amp have located and seated correctly. Test for correct operation. Have a cup of tea safe in the knowledge of a job well done, and another piece of kit saved from landfill! 

17 comments:

  1. la cinghia più lunga a cosa serve? non è il caso di cambiare anche quella?

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    1. This comment has been removed by the author.

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    2. È per il drive della bobina. Puoi cambiarlo se non è riuscito. Questo era ancora buono.

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  2. I liked Mitsubishi video recorders from my limited experience renting them, but found that the satellite control function, where fitted, sometimes, or on some models nearly always, changed code at random. One that did so brought to an end my rental days. I had no idea about any that were good with system A.

    I switched to Panasonic when I started buying video recorders - my last working one is a combination DVD machine as well.

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  3. Hi,
    Thanks so much for this site - I was struggling to find out how to remove the deck from an M50V - there are 3 screws underneath as well as the 5 on top!
    All the belts had turned to a horrible tarry mess & there is no way to sort this without removing the deck from the unit.

    Tim.

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  4. My HS-M60V has replaced its belts with a goo.
    Really looking forward to cleaning that up!
    Can you suggest a UK source for replacements, notobsolete appear to now be obsolete!

    ReplyDelete
    Replies
    1. Indeed they are ... I had to make my belts up out of CPC's selection. The loading belt is still available here ... https://www.donberg.ie/descript/7/7205.htm

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  5. Hi.
    Great site! I have just the same video, and want to lube it and change the belts. But now I can’t get the end sensor switch off. I’m afraid to wreck something. And the cassette loading thing is stuck to the board with 2 wide switches. I just don’t want to pull it off, if I break something.

    Kind regards,
    Patrick from Denmark

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    Replies
    1. Hi Patrick. The end sensor is optical, not a physical switch as such. It's connector should just unplug and you can lift the whole mech clear of the PCB.

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  6. Thanks for answer =0) But it is the connector, that is stuck. I’m affraid to pull hard. When I eject some tapes, the tape comes out shortly, and being pulled back in the video. Sometimes 3 times, before I can take the tape out. Is it just the belt, that should be replaced? And sometimes the video automatic play, when a tape is inserted, and sometimes not. And sometimes the L and R is missing in the display. It’s really strange sometimes. The display is also dark, like it is burned out. What to do? Sincerely Patrick

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    1. It's likely that the mode switch is giving a noisy signal. It needs to be removed, disassembled and cleaned up. Try to find a youtube video on another machine where they describe the mode switch (sometimes called a mode select switch), this will show you what you're looking for. Either way, with this mechanism, the deck will need to come out.

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    2. Hi again =0) The end sensor cable finally came off. But the multipins are really stuck. Shall I just pull upright? I am afraid, they break.

      Sincerely, Patrick

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  7. Hi again. Finallly, the end sensor cable came off... Now I am struggle with the multi pin connectors. They cant get off. Really tight. Shall I just lift upright? Kind regards, Patrick

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    Replies
    1. The whole deck should now just pull off. My loading belt has worn out again, so I'm going to be doing this again soon.

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    2. Thanks =0) Should I just pull upright or turn it a little bit over the optical thing? The multipins seems to turn over.

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    3. Hi again :-)
      Sorry, I'm asking again. I've still not removed the deck. The multipins on the deck are really stuck... Do I have to pull the deck straight up?
      Cheers, Patrick

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  8. Hi again.
    Finally, the deck came out... and the loading belt is changed. But I think, the hole loading mechanism is very slow. Like there"s not enough power to load or eject the cassette. It was slow, before I got it repaired. Is this just normal with this model?
    Kind regards, Patrick

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