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The quick fault solution system has hopefully now been fixed, so fixing tips can be added to each model again.

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Fivos Sakellis
Tuesday 13th February 2018
1:22 pm U.K.

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Hi Rich. When you press stop, can you hear the loading motor trying to turn the loading ring? Or is it just dead?

Rich
Tuesday 13th February 2018
3:42 pm U.K.

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Hi Fivos,

When I press stop I can hear the loading motor spinning for around 4 seconds before it shuts down. There is good tension on the belt as it's new.

Thanks

Rich.

K Lambert
Tuesday 13th February 2018
9:30 pm U.K.

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Rich:

What could be happening is the loading ring motor maybe a tad too close to the loading ring and after time it's just enough so it cannot do this successfully. Hence why when you tap it underneath it does his OK.

What you will have to do is play things with the cover off and the top board and protective metal shielding off too.

Then when it get's to the end of the tape you can see if it's trying to unlace or not. If it IS then it's what I stated or the felt clutch is slipping and we can go from there.

If it's NOT then the right hand tape end sensor is not doing it's job.

The switches I mentioned are two small copper type contacts that get opened or pushed together and you can obtain contact cleaner to ensure they are not oxidised.

The refusing to turn off could be down to the vcr not going from the tape end process and hence this refusal to do this until it's happened. I know the VTC NX100 is a bit quirky like that too.

Hope this helps....................Kev

Rich
Tuesday 13th February 2018
9:58 pm U.K.

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Hi Kevin.

Thank you for the reply and advice. I have some free time tomorrow so I'll take another look at it and report back.

Thanks again.

Rich.

Fivos Sakellis
Wednesday 14th February 2018
1:19 pm U.K.

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Hi guys. Check out what I found after opening up the bottom PCB on my VTC 5000

https://vintage-radio.net/forum/showthread.php?t=143920

Doesn't that seem strange?

Fivos

Rich
Wednesday 14th February 2018
8:09 pm U.K.

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Hi Kev.

I've got the vcr apart but I can't seem to spot the tape loading ring end switch. Is it visable from the top or bottom please?

Thanks

Rich.

K Lambert
Wednesday 14th February 2018
9:45 pm U.K.

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Rich:

When you remove the top cover and pivot the circuit board up and remove the can shielding you can see the switch contacts at the left side just before the capstan shaft. They get pushed together by a cam on the plastic loading ring.

..Kev

Rich
Wednesday 14th February 2018
10:32 pm U.K.

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Hi Kev.

Thanks. I'll clean them now and cross my fingers 😇

Regards

Rich.

K Lambert
Thursday 15th February 2018
12:06 am U.K.

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Rich:

If that does not cure it I can guide you to overhaul the tape loading ring area.

.....Kevin

K Lambert
Thursday 15th February 2018
12:15 am U.K.

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Rich:

After re reading your original post i'm convinced you have a slightly slipping clutch and the loading ring motor area needs a sort out.

.......Kev

Rich
Thursday 15th February 2018
7:56 am U.K.

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Hi Kev.

I cleaned the contacts and also removed the loading motor assembly to clean all of the old grease off the cogs and put a little fresh grease on.

It was loading and unloading lovely.

I then let an L-750 tape play overnight just to see if it was cured. Unfortunately when I looked at it just now it hasn't unthreaded again.

The end sensor is fine as I could picture search to the end of the tape and it would unlace and rewind before the loading ring gets stuck.

Regards

Rich.

K Lambert
Thursday 15th February 2018
1:39 pm U.K.

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Hi Rich

What you will have to do to be absolutely sure is............

1.Remove the loading motor assembly again.

2.Remove the small circlip holding the worm gear on.

3.Slide the worm gear off the shaft. Mind those two flat washers at each end!

4.Pull off the plastic end of the worm gear/pulley and hold the spring when you do this.

5.Remove the pulley and lightly abrade the felt material on the end of the worm gear.

6.Look at the pulley area which contacts the felt pad (circular grooved).

7.Get a needle and make about five score lines from the outer to the inner over the grooves.

8.Put the pulley back and then the spring, making sure the metal disc washer is there for it to seat on and then the end cap and push this in all the way. Try to turn the pulley when holding the worm gear, there should be some resistance.

9.Lightly grease the metal shaft.

10.Slide the worm gear back on and refit the black outer washer and circlip.Be careful there as it easily pings off.

11.Grease the worm gear.

12. Put the whole assembly back ,and this is VERY important. BEFORE you tighten the three screws up, make sure A: the assembly has seated and the gears intermeshed with the loading ring perfectly and ,B: push the whole assembly towards the rear of the vcr BEFORE lightly tightening the three screws. There may not seem to be a lot of free-play there but it WILL affect this from doing it's job when it's been sitting a while TRUST ME. Other wise the clutch will slip.

If all, this is done exactly as I've stated then we can count that out as causing your issue.

Good luck and keep me posted.

.....Kev

Rich
Thursday 15th February 2018
2:34 pm U.K.

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Hi Kev.

Blimey.

Thank you for all that information. I have some free time this weekend so I'll sit down with it and give it the once over.

I'll let you know the results.

Many thanks again.

Rich.

K Lambert
Thursday 15th February 2018
2:49 pm U.K.

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It may now give some the insight in exactly what I do to ALL the Sanyo's I work on.

New belt's just don't cut it now.

I am Thorough with a capital T.

Good luck.........................Kev

Rich
Friday 16th February 2018
8:36 pm U.K.

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Hi Kev.

I've just done all of that. The felt pad was oily so I cleaned it off the best I could. I'm now going to leave the vcr play a tape from beginning to end and cross my fingers. Haha.

I'll let you know if the repair is a success.

Many thanks again!

Rich.

K Lambert
Saturday 17th February 2018
3:12 am U.K.

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Rich:

I think you've found the issue.

the reason that pad was oily is no doubt someone has put oil near there and it's contaminated that pad.

I've seen that done many times. I even had one to work on where WD40 had been sprayed everywhere an it had ruined the felt back tension band, and the felt pads for both reel spools.

Yes oil should be used in some places but very liberally and only in those specific areas.

If it still slips you may need another uncontaminated worm screw. Let me know if you do.

....................Kev

Rich
Saturday 17th February 2018
10:36 am U.K.

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Kev.

It seems that its worked. I played an L-750 through twice and it unlaced at the end both times.

Fab!!

Many thanks again for the info on the repair!

I'll now be using it all weekend just to be certain that it doesn't happen again.

Thank you.

Rich.

K Lambert
Saturday 17th February 2018
12:38 pm U.K.

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Hi Rich

When you've seen that a few times it does point you in that direction.

IF you need a worm screw with oil free felt pad let me know.

I have many good used spares.

Glad you are happy.

Enjoy those Beta movies.

...Kev

Rich
Saturday 17th February 2018
12:47 pm U.K.

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Hi Kev.

Do you have 2 spare worm screws I could buy please? One for Sanyo vtc5000 and the other for this Sanyo vtc6500. I always try to carry spares for my vcrs just in case they do bugger up in future.

Could you email me with the prices please?

I'll be having a video nasty weekend so the 6500 will be put through its paces 😄

Thanks again

Rich.

Bernard McGarry
Sunday 18th February 2018
11:21 pm U.K.

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Hi everyone, My fault is on a Sony Video SL-C6UB PAL UK. Its fault (on playback) is that the Drum motor speed is hunting. Despite changing the suspect electrolytics and adjusting RV1 and RV9 and supply voltages for ripple, there is no improvement. The hunting cycle affects the tracking about every 30 seconds, as if the tracking knob is being adjusted every 30 seconds, which breaks up the picture as you would expext. Also if the temperature around chip C3 on the SS9 control board, is adjusted it creates drum hunting really badly. Is it possible that the 30 yr old paxolin PCB has become 'leaky' and temperature sensitive, thus affecting the Drum Tracking?

Thanks for any advice

Bernard

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