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Noel Higgins
Wednesday 30th May 2018
11:33 pm U.K.

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Weber

Less than the required tape back tension will affect tape alignment and hence it is not unusual for tape crinkle to occur unless all other aspects are set perfectly. Factors affecting that are

The condition on the pinch roller surface and the upper and lower bearings

Whether the capstan parallel setting is correct

Whether the ACE assembly is set up correctly

For the tape damage.

Check the surfaces of the guide posts but in my experience the video head drum surface is usually the cause of this problem. Aluminium oxide spot deposits are very hard and can happen after long periods of non use if contamination and moisture lead to corrosion.

Check the point on the tape width that the crease occurs. Compare this with the position around the head drum and look for a point of corrosion on the drum surface or a nick in the upper or lower edges of the head slot.

In either event you would need to polish away and smooth the aberration once you find it.

regards Noel

K lambert
Wednesday 30th May 2018
12:15 pm U.K.

Weber:

If the tape is being scored it sounds more to me like you have a piece or debris or grit or something on the tape path surface.

As the tape glides by it's big enough to score the tape across is length. You need to find out where this is.

Could be anywhere ,tape guide, head drum (mind those heads),capstan shaft(although ulikelly).

.Kevin

weber1600
Tuesday 29th May 2018
10:22 pm U.K.

Seat124

Noel

I have managed to adjust the potentiometer RV002 to regulate the tension of the tape ..

But unfortunately it is impossible for me to leave totally adjusted ..

The ribbon is still marked by a horizontal line in the same place ..

In order to prevent the tape from being marked, it is necessary to reduce tension, but when decreasing tension, the pinch roller wrinkles the tape.

Noel Higgins
Monday 28th May 2018
7:49 am U.K.

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Martin,

Thanks for the update. I hope you are doing well.

Webber,

The SLC9 back tension is adjusted by RV002 on the SS11 servo board at the base board of the unit.

I usually adjust it with a tape playing back a 1khz tone and video test signal.

You can hear if there is warble (wow and flutter) on replay audio and observe the video waveform on a CRO.

I mainly adjust while listening to the tone and seeing how much the tension arm is tightening up and stop adjusting just before the tape tension sense arm touches the stop on the main main flexible arm. If you look at the unit in play mode I think you will understand what I mean.

Why dont I use my back tension test tape?

In the SLC9 tape load mechanism, you cant observe the back tension dial reading.

My suggestions above are how I do it and it works. Probably not what it says in the service manual.

Then again Sony did not produce a test tape that allows you to adjust the audio response with a full swept frequency range and the video at the same time either.

regards Noel (Betaheaven.com in Australia)

Martin Evans
Saturday 26th May 2018
10:05 am U.K.

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As you may have noticed, you can now enter any information for your contact details, this could be your E-mail address or for example a Twitter handle. If you don't want to give any contact details, you can now leave the field blank. Contact details are displayed if you click on a post's name.

weber1600
Saturday 26th May 2018
7:55 am U.K.

Seat124

K Lambert

In the service manual it states that there are two servo plates ..

The SS-11 and JR-1 boards

I can not locate the torsion potentiometer.

On the plate the potentiometers are marked as RV ..

What is the potentiometer to adjust?

Noel Higgins
Saturday 26th May 2018
7:35 am U.K.

David,

Email sent

david grant
Friday 25th May 2018
6:54 pm U.K.

betamax

Hi Noel I typed out the message and sent it in my sent box. I saw it but a hour later a message came back say connection refused.I will contact aol,customer service there is a phone number for them. I dont know why this happens has anyone else had this occurto them regards David Grant.

K lambert
Friday 25th May 2018
6:00 pm U.K.

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William:

I know from experience this happens on the SLHF950 and is down to the failing of the bias transformer on the sound area of the board.

It's usually grey in colour and has a few pins on it's base.

It could well be the issue with your c5.

.Kevin

william
Friday 25th May 2018
5:49 pm U.K.

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Hi have a sony sl-c5ub works great but problem plays sound perfect but record it will not erasing sound on previous recordings still hear the old sound its it a swicthing transister thats away i have checked the realys all seam good thanks

K lambert
Friday 25th May 2018
11:49 am U.K.

Weber1600:

You most definitely have a piece of grit or foreign body somewhere along the tape path.

I would look at the area at the upper parts of the tape path as that is where the scoring is occurring.

be careful of those very fragile video heads located around the silver head drum slot.

The back tension to this model is 48gcm and is adjusted by a torque pot on the servo board.

If it isn't EXACT the trick play modes won't work very well, if at all.

...Kevin

K lambert
Friday 25th May 2018
11:46 am U.K.

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Hi Guys

Does anyone have a spares Toshiba V5470B or know of one kicking around for spare parts?

The reason I ask is I've been sent one to repair and so far it's going pretty good.

Someone though has removed the top assembly to the head drum that has two ceramic spring loaded fingers to hold the tape down around the centre of the head drum.

The whole assembly is gone. You can see the new/clean metal where it once was screwed in place.

If not I will see if a Sanyo VTC 9300 one is similar as the inside is very similar to this model and the Sony C6.

Cheers in advance......................Kevin

weber1600
Thursday 24th May 2018
10:13 pm U.K.

seat124

Hello...

My Sony sl c9 marks the tapes on the top of the tape.

It makes a horizontal line ..

By opening the tape flap you can clearly see the horizontal mark on the top of the tape.

Once the tape is inserted in the video, when you put it in the horizontal mark

begins at the height of the rounded black tensor that is located on the left ...

I hope to have help for the adjustment and that the rest of the functions of the video are operative.

weber1600
Thursday 24th May 2018
10:03 pm U.K.

seat124

Hola...

Mi Sony sl c9 marca las cintas en la parte alta de la cinta..

Hace una raya horizontal ..

Abriendo la trampilla de la cinta se puede ver claramente la marca horizontal en la parte de arriba de la cinta..

Una vez introducida la cinta en el vídeo , al ponerlo el Play la marca horizontal

comienza a la altura del tensor de color negro redondeado que está situado a la parte izquierda...

Espero tener ayuda para el ajuste ya que el resto de funciones del vídeo están operativas...

weber1600
Thursday 24th May 2018
9:54 pm U.K.

seat124

Hola..

Sigo por aquí..

K lambert
Thursday 24th May 2018
3:19 am U.K.

[email protected]

Just an update

Have found the Toshiba manual on my old trustworthy owner- manuals.com site.

.......Kev

K lambert
Wednesday 23rd May 2018
8:56 pm U.K.

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Hi guys:

Does anyone have the service manual for a Toshiba V5470B?

I'm working on one and there is one belt I cannot seem to find were it goes (bearing in mind three were missing and two like glue. It's the smallest diameter thinnest one.

Also there's a spring to the bottom right of the cassette tray assembly.

This spring has come unattached at the inner side and I cannot see where it goes.

Cheers.................Kevin

david grant
Wednesday 23rd May 2018
3:17 pm U.K.

[email protected]

hi noel maybe you could send me a email I should then be able to send you one by return ,[email protected] or [email protected] ,I will have a look at your webpage later this evening its now 16.15 and by the time I get to the supermarket the reduced bargains will by on display ,why spend any more money than needed

Noel Higgins
Wednesday 23rd May 2018
2:14 pm U.K.

[email protected]

David

I should have said no emails received as well.

regards Noel

Noel Higgins
Wednesday 23rd May 2018
12:43 pm U.K.

[email protected]

David,

See Betaheaven.com

david grant
Tuesday 22nd May 2018
6:20 pm U.K.

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Hi Noel I have sent you a message I think it got through after several attempts

david grant
Tuesday 22nd May 2018
5:19 pm U.K.

[email protected]

Hi Noel please just remind me of your website.It should be in my contact list,but last year my account got hacked, can you also remind me of the heads part number for ,SL-HF 950 DSR--- comes to mind. Kevin I really must take more care when writing posts my spelling is not great and my,Grammar and punctuation could be better.I guess the secret is taking more time. I notice Kevin you also visit Paul Stennings vintage radio website it is very useful and interesting some of the,restorations are painstakingly done .

Noel Higgins
Tuesday 22nd May 2018
2:24 am U.K.

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Kevin,

For your information the tape load motor from the SLV777 or SLV815 VHS machines of that era (late 1980s) can be used as a replacement for the SLHF950 tray motors. Slightly bigger mounting screws so mount holes need to be wider but the plastic drive gear on the shaft and motor dimensions are otherwise the same. Motor tags are 90 degrees off but can be bent to suit. The motor magnetic shield can be swapped over as well. (same motor case diameters)

regards Noel

K lambert
Monday 21st May 2018
2:26 pm U.K.

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Noel:

I've had to sort two out like that already. When they fall off or loose contact the hatch lifts up and keeps clacking until it goes down on it's own.

I re glued them back and then hot melted a plastic shim to go over the whole attached part area to ensure it never happens again.

This with the broken sled track is going to get more common over time ,so I always check both those areas out now too.

Thanks for the update though :)

..........Kevin

Noel Higgins
Monday 21st May 2018
1:49 pm U.K.

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David,

I have a few decent looking C9 remotes. I could send you pictures if you email me. I have the same email address as before or you can get it from my website.

Kevin,

I am fixing an SLHF950 currently and discovered a brand new fault. (To me at least)

At first it was just a replacement motor need because the rear bearing had collapsed. Whe I changed that it was still playing up and not sensing end points of travel.

In the position sensor switch of the tray motor drive, the switch wiper contact had fallen off just like they do in the Sanyo M40 and M50 tracking controls. The black plastic locating pins get brittle and break.

Fortunately its an easy fix if you drill two 1mm hole and loop some tinned copper wire to hold the wiper back in place. Will have to document that and send it with pictures to the Martin from Palsite.

Regards Noel

K lambert
Monday 21st May 2018
9:47 am U.K.

[email protected]

Hi David:

Good to see you back.

You are of course referring to the one currently on E-Bay?

Yes I wouldn't bid as I have no way of testing it. It could be a worn control head. Or it's just dirty and god forbid worn heads!

I always ask the seller too now on high end esoteric machines before I bid. There are certain tests they can do to ensure those heads are in great shape. Seeing as most want over the odds for a untested or faulty machine. Seeing that way too much now.

Also on a lighter note David.............Can you try paragraphing your comments with punctuation. It's quite overwhelming trying to make out your requests as it's all jumbled together. I'm sure I'm not alone with that.

Good luck with it...................Kevin

david grant
Sunday 20th May 2018
8:51 pm U.K.

[email protected]

hello noel its a remote i would like a decent C9 one ,I maybe going to see a lady who has a 950 it was on ebay for £269.but did not get any bids she said there is no picture on normal speed but there is on still frame I have asked to view and will take a tape to make test recording the people she got it from say its only been used to record audio I did explain that head wear can occur just because the tapes in touch with the head all the time be she thinks because it not been recording a picture that they are not worn so a test should reveal plus I will try cleaning to demonstrate this I still have a new 950 head disc but fitted it to a 950 that seems to have problems in the head amp switching area but if I can get it for a reasonable price I could repair it if the heads are bad by fitting the complete drum from my one I have 4, 950s ,3 work really well but I need to remove the sled and do the switch so that the chattering gears get sorted .I do use the tuner input because my sky hd box supplys a rf feed and aks for a freeview signal so the tuner on mine still gets used i just link every thing like in a so called daisy chain effect I don"t know if you have the shy Q syystem in Aus but thats my next thing I have also since I last messaged you restored a dynatron CTV 28 ,I have good unused brand new tube for it as a spare the one fitted tests good on my tube tester and the pictures very good I also had another cabinet which I am changing whereas if removing top off mine and extending it because another model had this and its 8 inches taller but the top opens for a space for a vcr to be added back then they used phillips n1500 or n1700 choice was for the buyer back in 1976 mine will have a hinged lid and hinge the front so either a C9 or 950 can be used but its another project regards David Grant.

Noel Higgins
Saturday 19th May 2018
12:28 pm U.K.

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David,

At the end of your message do you mean you want remotes or machines?

regards Noel

david grant
Friday 18th May 2018
11:36 pm U.K.

[email protected]

hi to noel and kevin its been a long while since i last posted and a lot has happened i lost my flat due to problems with my old landlord and have now got a housing assoccitiation my C9s a 950s have been stored I recently got another C9 the display works but I took the step of opening up the DC-DC convertor and the caps look fairly good but have bought replacement 105c types,it has another problem in that it worked for say 15 mins and now the reels are not rotating either ff/rew or play i looked on list and it says caps on SS11 board can you having repaired faults like this also tell me which ones to check and I also would be greatful for which caps to check in the 950 power supply I did rebuild one many years ago and have now got 4 .I know which is the rebuilt machine but want to go down the route of changing caps on the others to prevent failure I still use both a 950 and a C9 on a very regular basis and the C9 which i rebuilt the DC is still working fine I also managed to locate 2 brand new head discs for a C9 but one machine I bought from another from this sight did need a new head disc although I was aware of that when I bought it a having the correct alignment jigs and test tapes I fitted it very carefully I am also looking for 2 packs of belt kits for a C7 , and noel the jog shuttle remote I got from you works great i am looking for a good remote a C9 and 950 maybe you can help all postgage costs met of course regards David Grant

Noel Higgins
Sunday 13th May 2018
10:43 pm U.K.

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Kevin,

Good point about using the original broken plastic rail if t is still there. All the machines I have had to repair had that missing so I had the neaten up the break to a square section that I could replace whilst reinforcing the remaining plastics edge.

I think the hotter climate in the North of Australia affects both power supply life and plastic aging as the plastic gets brittle.

I have also had a few machines suffer additional damage to the trays drive gear such that is breaks and spins on the shaft. So fixing this issue is also required in some cases.

I also have a number of refurbished SLHF950s I should release back into general use plus many of the original remotes plus the VHF jog shuttle remotes with VCR1 selection which also work well with the SLHF950 including for APS functions.

cheers Noel

K Lambert
Sunday 13th May 2018
1:56 pm U.K.

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Lydia :

Oooops..........

The Sony slhf950 is notorious for a failing PSU IF the capacitors are not checked and changed out.

I have now repaired around four as they wipe out a fusible resistor and two transistors if left long enough like this.

As noel has stated you can upgrade to another system but I have successfully repaired them.

I suppose the hotter the country (yes Australia is pretty hot) the more common the failings over shorter periods of time.

The broken plastic rail I've repaired too but if the original broken piece is included it makes this easier. You have to re enforce that are though so it doesn't get over stressed with that spring loaded roller.

Also the mode switch for the tray lifter mechanism is know to fall off. You can repair and re enforce that too.

I have two fantastic shape 950 's here currently being refurbished and strengthened that I will be offering when completed. Both with very light use and great heads, complete with remotes and manuals too.

Where abouts are you located?

....Kevin

Noel Higgins
Sunday 13th May 2018
8:29 am U.K.

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At 3/ below I should have said obtain a 240V AC to 12V DC @ 4 Amp power supply

Noel Higgins
Saturday 12th May 2018
12:46 pm U.K.

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Lydia,

The transport screws protect the plastic tray slides from being damaged during transit.

That fault when it happens means that you can't eject or load a tape. It is mechanical damage and you can cut away the damaged plastic and repair the broken section by fabricating a right angle metal replacement and the point of damage and screw it into the centre metal chassis frame. I use cut down aluminum extrusions to solve this problem.

Completely dead sounds more like power supply. Commonly in time the HF950 power supply fails.

As the power supply has two parts, an AC to DC 12V going into a DC to DC inverter requiring an input of 12V DC at up to 4Amps and the first section usually fails you can.

1/ Have the original supply repaired. (new electrolytic capacitors, transistors and diodes as required) OR

2/ Just supply an external 12V DC source to the machine OR

2/ Obtain a modern and more efficient 12V AC/DC plug pack and install the circuit in the machine requiring change of the input lead to add an earth connection to the case. (otherwise the case can float at half mains voltage because of the action of the EMC filter capacitors.)

regards Noel (Betaheaven.com)

Lydia
Saturday 12th May 2018
9:27 am U.K.

[email protected]mac.com

We foolishly transported our wonderfully functional Super Betamax SL-HF950ES without placing the transit screws - now it's completely dead!

Any idea where the most likely fault is & what we can do?

Steve Szmidt
Tuesday 8th May 2018
3:14 pm U.K.

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Hi all. I just purchased a Sony SL8000 Betamax in excellent cosmetic condition with user manual and remote, no dust cover. It power up and I have set the time. The eject button works and it will accept a tape, but no other key works (play, FF, RW). I saw that you can still buy belt kits for this model on ebay. Is it likely to be a belt issue and how easy are these to fit? Has anyone got a service manual I can have a copy of please? Any help appreciated.

Bjorn
Monday 7th May 2018
9:11 am U.K.

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I have an unused ACE head assembly for SL-C40 is anyone is interested (A-6761-064-A) this was initially ordered for another machine which sadly got damaged by courier and proved too far gone to repair, so can sell this part on. If I remember correctly, it won't go in C30 so not worth me keeping in stock for spares.

If interested, send me an email.

DAVID BRUNNER
Sunday 6th May 2018
7:06 am U.K.

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I Have the Sony SL-F30 but record in B/W

I put in the input a colour bars image

In the IC006 in the pin 39 appears de chroma reduced in frequency

After the chroma pass to the Q032

In the RV008 I put the oscilloscope and only exist DC

When I pulse the Tuner / AV appears the chroma 1 second after dissapear and the DC up a few volts

The DC arrive from R341 (220 ohms) to the emiter of Q032

When I remove the R341 the chroma appears in the RV008 with DC and in C067 without DC

In the schema appears 6.1 volts in the emiter but I have less when the R341 is connected

This is the schema: https://printable-classific.000webhostapp.com/Schema.GIF

I don't understand why put 6,1 volts to the emiter?

K Lambert
Thursday 3rd May 2018
8:39 pm U.K.

[email protected]

Hi Rob

I forgot to mention about the caps. I've just serviced one and those caps had wiped out the clock/timer IC. Luckily I had a spares one for that.

Yes it can run a bit hot. I've had an M10 that did that and to be safe I changed over the mains transformer and it doesn't get quite as hot. If the transformer isn't really hot just the heat shielding you should be fine.

The other thing with the M30/40 is those tracking pot's can sometimes come loose internally and you have to glue them back together. Otherwise you get a offset tracking result.

One way to be sure they are fine is turn it left and right and during picture search mode, the three or four noise bars should rise and fall exactly as you turn the tracking. If they don't then it will need removing and sorting.

If those heads are great (as both mine are ) then you have a good find there. Worth keeping hold of.

.Kev

Rob COLLIS
Thursday 3rd May 2018
5:36 pm U.K.

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Hi Kev,

Yes, I've had the M30 a little while. Another one of those "buy these tapes and you can have this non-working player thrown in".

Just had another look today at it. Noticed that 3 capacitors in the power board were bad. Two were high ESR and another was leaking. Replaced them and guess what - the tape-remaining gadget now works. I wasn't expecting that. It's possible that it also fixed the "clock set" function as I think this didn't seem to work last time either.

Also did the reel torque mod you mentioned. The unlace was actually fine, but was struggling a little (I thought) on wind/rewind. Swapping R96 from 560ohm to 100ohm seems to have improved things.

Will try and make a YouTube video of it as it seems like quite a rare machine. Just left it playing for 3 hours and everything fine. Possible that the tracking isn't completely aligned, but will look at that another day.

The "still pause" is absolutely perfect BTW - I guess that 3rd head hasn't had much wear. Overall very pleased with the unit.

The only thing I have noticed is the heat-sink in the power board does run quite hot - is that normal?

Rob.

DAVID BRUNNER
Tuesday 1st May 2018
8:53 pm U.K.

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One of the advantages of the Betamax videos is that the luminance is free of chroma signal

I have a VHS of the brand JVC, the luminance signal has some of the 650Khz from the chroma signal and is very visible in colour bars

I test this by removing the chroma in reproduction

K Lambert
Monday 30th April 2018
2:58 pm U.K.

[email protected]

Hi Rob:

I didn't know you had an m30 ?

Yes I agree whilst not as advanced as the C9 it was a very stylish machine offering a few features never to be seen again on their UK models.

As for your queries..

The tape remainder indicator ,I've never seen one that doesn't do it's job.

From what I can remember if the tape is blank I believe it just circles around.

I may be wrong.

The sensor is located underneath the left spool.

If it does this with recorded tapes then it could also be the IC that controls this on the bottom board is faulty. The IC part number is LM6402H and the position is IC3004.

As for the torque mod. Yes I do this on all the 'M' series models as like the VTC 5000 /5150 they need a bit more power after time as this motor ages. You notice this failing mainly when pressing stop.

The resistor is on the bottom bard on the left under a metal shield and is number R3096 (R96) and you go from 560ohm (original) to 100ohm.You will also find it difficult to source the original 1/6w size but 1/4w will work just as good only slightly bigger in size.

The NX100 doesn't seem to suffer with this issue.

Also a tiny drop of suitable oil to the top of the motor bearing helps as well as these machines have been sitting around for long periods of time.

I also told you about refreshing those tape spool edge grooves with a needle ONLY. Also the centre pulley ones too.

If they are all new then this will be OK.

What is the still frame like on yours. I've seen a few with that third head being worn more then the normal two. Obviously through wear.

Keep us posted...................Kev

Rob COLLIS
Saturday 28th April 2018
7:22 pm U.K.

[email protected]

Noel,

My apologies - been distracted on my Sony SuperBeta player issue. Will get back to it soon.

Kev,

You may have a point regarding Sony vs Sanyo. Whilst I really like the Sony picture quality (in later front-loader models), the Sanyos are so much more satisfying to work on. Given my frustration with the SuperBeta player I have been struggling with, I turned my attention to a Sanyo VTC-M30 that was lying around on my "spares shelf". Stripped it down, cleaned everything, re-greased/oiled, replaced belts and (parts of) the idler and surprise-surprise a lovely working machine. Quite impressed with the video quality too.

A couple of minor queries:

- The tape remain feature. On this machine, the LEDs on each side are constantly "circling" - is this correct? I read on here that the sensor for this can often get gunged-up. Where is this sensor?

- The fwd/rwd motors seem a little underpowered. Is there any equivalent of the 5000 mod to give the motors a little more torque?

Rob

Rich
Wednesday 25th April 2018
12:31 pm U.K.

[email protected]

Hi William.

I have a new boxed ace head for the c7 if you're interested.

Send me an email if you like.

Rich.

Rob COLLIS
Tuesday 24th April 2018
6:54 pm U.K.

[email protected]

Hi William.

If you can get to Staffordshire to pick up, these look good. Very high chance of the ACE head being good

https://www.ebay.co.uk/itm/Sony-Betamax-C7-C5-three-machines-vintage-video-Beta/123087402025

Rob

william
Tuesday 24th April 2018
12:10 am U.K.

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Hi i am looking for a audio control head (ace) working one for a sony c7 betamax if anyone has got one so i can finish fixing this or know where i can get one thanks william

Noel Higgins
Monday 23rd April 2018
7:03 am U.K.

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Kevin

I am still impressed that they stilll work these days as later technologies seem to have no where near the reliability. The SONY SL HF960 reached a peak of capability that the SANYO machines did not but I would agree that the Sanyo machines are better workhorses.

Guess it depends on what you want out of a machine

The SONY machines moved on to the S (serial) and L (lanc) modes of interconnection for use with other Format machines (8mm, VHS and Super VHS) for domestic editing which was great to use in conjunction with APS. That’s why I like the SONY machines more.

I have given up on doing repairs of most top loaders except the Sanyo 5000s which despite the plastics seem to be relatively reliable

Cheers Noel

K lambert
Sunday 22nd April 2018
1:32 pm U.K.

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Noel:

I agree to a point but it even afflicts their 'superior' and flimsy 8mm decks too. The Achilles heel of their later designs. Rendering many of them useless unless lucky enough to find one that hasn't got cracked gears or spool wheels.

Being intricate and clever is one thing, making designs that last is another.

They should've taken a leaf from Sanyo's designs. They may not be the slimmest, most technically advanced designs but they sure as hell don't break internally as much, and performance wise ,I've seen many different makes and models daily working and there is not that much between them.

Yes, the rubber belt's will cause issues after many years use but at least they are easily sorted in most cases.

Maybe the 3d printers will be the answer for parts now totally obsolete for the Sony's. Mind you the plastic will have to be better and more durable.

......Food for thought.

Noel Higgins
Sunday 22nd April 2018
10:50 am U.K.

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Kevin,

You can’t judge all SONY models by this design which was greatly simplified in design to the earlier robust designs. Plastic is the enemy of all the SONY models as the gears eventually go hard and break.

In my view the worst machines to work on are the Toshiba.

Cheers Noel

K lambert
Friday 20th April 2018
12:37 pm U.K.

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Sony's............... don't you just LOVE Em !!!!!?

Welcome to the club Rob.

.Kev

Rob COLLIS
Thursday 19th April 2018
12:55 pm U.K.

[email protected]

UPDATE ON SONY SL-P8800R (Super Beta Player)

-

Kev/Fivos/Noel,

I think I am accumulating problems here. I now seem to have 3 problems and not sure whether the last 2 are related

1) Very bad dropouts on playback

2) Capstan running too fast

3) **NEW** Failure to lace.

Following Fivos' advice, I looked at the SMD caps on the Capstan Motor Assembly. *** 2/3 were open circuit ***. Replaced with equivalents.

But... before I could prove that was the issue on problem 2), problem 3) has occurred.

I have taken some video ( https://youtu.be/CyuzSv9Dtcc ) which might tickle someone's memory and Noel has sent me some scans of a similar Beta service manual which I will look at today.

To summarise problem 3).

- Tape mechanism loads, capstan spins clockwise for 1/2 sec, then anti-clock for 1/2 sec. Threading motor moves backwards (?) for a split second, then forwards (clockwise) for a split second, then aborts. Tape ejects.

- I have manually turned the corkscrew drives (with power off) to prove the loading ring can lace correctly with no obstructions. All okay.

- I have unplugged the capstan assembly to see if if problems 2) and 3) were related. With Capstan assy unplugged, the lacing problem still occurs.

- I am not sure what voltage rails are supposed to be present on this machine, but the power board appears to be providing +15v, +12v and +5v . All rails are steady.

Any views on how to approach this new lacing issue?

Do you think the Capstan too fast and this lacing issue are connected?

Rob

Rob COLLIS
Wednesday 18th April 2018
4:02 pm U.K.

[email protected]

Thanks Noel.

Looking at the external pictures, my Super Beta player does indeed look like the Australian model you refer to.

Let me see if I can get the Capstan issue fixed and I'll be in touch.

Regarding the DOC - I could not locate the usual pot marked "DOC" on my main board. Would be interested in comparing mine against any service documentation you may have.

I will ping you

Rob

Noel Higgins
Wednesday 18th April 2018
12:18 am U.K.

[email protected]

Rob,

On the SLS2000 VS17 board there is a drop out compensator adjustment and it is RV203. There is a voltmeter setting procedure to set it up.

I could take photos of the relevant circuits to see if you can track down your capstan circuit issues.

cheers Noel

Noel Higgins
Wednesday 18th April 2018
12:07 am U.K.

[email protected]

To Rob further down the page about his rare PAL beta player.

The mechanical construction seems very similar to the SLS2000 super betas we see in Australia.

They were a lot more plastic and hence a lot less reliable in the long term.

See http://www.palsite.com/sls2000ovi.html

I have a poor photocopy of the service manual but who knows how close the detail is to your unit?

You can monitor the video head waveform with a CRO on VS17 board CN005 pin 3 (with external trigger to pin 1.

If you have any specific questions it may be best to contact me through betaheaven.com

regards Noel

Miquel
Tuesday 17th April 2018
3:34 pm U.K.

[email protected]

Hi every body,

There is any body that has a SL-F45E servis manual or a some technical information.

I have a problem with this model and it's impossible to find any technical information.

With the technical diagram or schematics will be ok.

Thanks in advance

Dominic
Tuesday 17th April 2018
11:08 am U.K.

[email protected]

Does anyone have a front cover laying around for the Sanyo M10? Mine is missing the cover for the date/time/traking buttons.

Rob COLLIS
Saturday 14th April 2018
4:41 pm U.K.

[email protected]

Thanks for the advice Kev. Yes - I may love the picture quality of the Sonys but the Sanyos are easier to work on!

Based on other advice and research, the "dart-like" drop-outs are possibly due to the lack of drop-out compensator circuitry in this rather odd superbeta player-only. I have to also consider the possibility of residue still on one-or-more of the video heads as a tape was still wrapped around the heads when I opened it up. Some of the tape was "stuck" to the drum after 25 years of imprisonment.

I did recall your earlier posts with interference from other units and particularly some TVs (ie. plasmas) which seem to add "static-like dropouts". If I suspect this, I usually link up to my old Sony broadcast monitor and/or computer-transfer system. In all cases, the dart-like dropouts remain in this case so have sort-of ruled that out.

As I need to solve the capstan issue now, I am starting to suspect the capstan assy. On tape load, I can see the capstan do the same sort of "rock left, rock right" as a Sony head-drum with the hall-sensor failure so I need to look at that. Fivos also recommended to look at the SMD caps on the capstan assy board. There was some corrosion on this board so it is quite possible as the suspect. The fact the capstan speed was fine for about 1 day. Then the next day got faster and faster as the day progressed, then on the 3rd day wouldn't spin suspects a "dying" component - possibly that SMD cap.

I too have seen the "capstan speed up issue" on an HF100, but it wasn't actually my machine, so never needed to solve it. (Fingers crossed), my 3 working HF100s haven't had this issue.

Will update here with progress.

william
Saturday 14th April 2018
12:13 am U.K.

[email protected]

Hi i have a sony SL-HF950 in great working order exept there is no colour in playback colour on tuner and av outputs inputs but when playing any tapes just black and white anyone got any ideas thanks i have checked for dry joints the problem is on yc-40 board thanks william

pounder51
Friday 13th April 2018
10:33 pm U.K.

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Hi, I recently acquired a Sony AG-90 Betamax Cassette Auto Changer that I would like to sell to anyone interested? It's in excellent condition and has been in storage for a while. I believe these are quite rare!

K lambert
Friday 13th April 2018
4:38 pm U.K.

[email protected]

Rob:

I'm glad those Sony's are keeping you 'busy'. They can be a right pain as we both now.

Reading your comments about the dart like drop out's,there's a thing I would like to point out regarding what 'could' be responsible.

Do you remember when you had the other VTC 5000 and you sent me the video regarding the poor playback?. When I received it back it played perfectly for me.

There has also been two other occasions regarding a VTC NX100 and VTC M40 from two different individuals who purchased or had them overhauled by myself. As did you.

It turned out in the case of the M40 they guy had a VHS vcr on the top that caused his black drop out interference until he moved it off the M40.

The NX100 the guy found out he too had white dash like interference and brought it back only to find here it worked flawlessly. He found out a BLU Ray player he stacked on the top caused his issues.

Whether this is down to that and using todays screens (LED,LCD or plasma's) I don't know as I have a Sony C9 and Sanyo VHR874e stacked with no issues, but the lesson here appears to be if it's a beta VCR don't put other equipment on the top of it.

That could be your issue, with that anyways.

As for the speed issue I have an HF100 here with exactly the same problem. I've checked all components on the servo board. Tried the torque adjusting.

Replaced the entire servo board AND reel drive/spool board (with no issues) and it still continues to either go too slow, until you adjust the torque then when ejecting a tape it either won't play at all (until you speed up the torque) and then after a while it goes way too fast and cut's out the play mode. Other then that I have it A1 and seems to have been lightly used. The only other area I can think of is a varying power output from the PSU .All caps have been checked too. I also have replaced the torque potentiometer in case that had high resistance.

If you do find out what caused yours to do this I would love to hear about that.

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

K lambert
Friday 13th April 2018
4:33 pm U.K.

[email protected]

Rob:

I'm glad those Sony's are keeping you 'busy'. They can be a right pain as we both now.

Reading your comments about the dart like drop out's,there's a thing I would like to point out regarding what 'could' be responsible.

Do you remember when you had the other VTC 5000 and you sent me the video regarding the poor playback?. When I received it back it played perfectly for me.

There has also been two other occasions regarding a VTC NX100 and VTC M40 from two different individuals who purchased or had them overhauled by myself. As did you.

It turned out in the case of the M40 they guy had a VHS vcr on the top that caused his black drop out interference until he moved it off the M40.

The NX100 the guy found out he too had white dash like interference and brought it back only to find here it worked flawlessly. He found out a BLU Ray player he stacked on the top caused his issues.

Whether this is down to that and using todays screens (LED,LCD or plasma's) I don't know as I have a Sony C9 and Sanyo VHR874e stacked with no issues, but the lesson here appears to be if it's a beta VCR don't put other equipment on the top of it.

that could be your issue, with that anyways.

As for the speed issue I have an HF100 here with exactly the same problem. I've checked all components on the servo board. Tried the torque adjusting.

replaced the entire servo board AND reel drive/spool board (with no issues) and it still continues to either go too slow until you adjust the torque then when ejecting a tape it either won't play at all (until you speed up the torque) and then after a while it goes way too fast and cut's out the play mode. Other then that I have it A1 and seems to have been lightly used The only other are I can think of is a varying power output from the PSU .All caps have been checked too.

If you do find out wht caused yours to do this I would love to hear about that.

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

Rob COLLIS
Thursday 12th April 2018
3:28 pm U.K.

[email protected]

Hi all - hope everyone is keeping well.

Thought I might ask a question about a rarely-spotted machine. The Sony SL-P8800R (PAL).

I went down to Wiltshire,UK this week to pick up some beta tapes and the sale included this player which the seller's son was given when he worked at Sony in the late 80s. I had never heard of the player which is stated as a "Super Beta Player".

You should be able to see my pics at https://drive.google.com/open?id=1uGKMf1IG7ax8mTe7enj4GqRHRFVz1hLT

As you can see:

1) It is a PLAYER (not a recorder).

2) It operates on European (220v) and US (110v) voltage

3) It's mono !

4) Has the main circuitry simplifed into a single board (SV-25).

I fixed many of the obvious problems (which included something nibbled through part of the external mains cable which had blown the internal 1.6A fuse. It needed a thorough clean and a tape had been left inside laced up for 25 years which had to be (gently) peeled away from the head drum. I also needed to strip down the tape spools, clean and re-oil.

I would welcome any knowledge the team have on this model - it must be pretty rare. I can only find one reference to it on google.

I would love to get this baby working but have an issue that maybe - in the absence of any known service manual - the community can help with ideas.

Problem 1) When I first powered it up after fixing the mains issue and cleaning, the machine played with many "dart-like" dropouts. I suspect this was residue on the heads from my imprisoned tape? Do you agree? What is the best approach here - I read that contact-cleaner on a swap followed by IPA to "wash off" the contact cleaner - but what do you guys think? There is not drop-out compensator circuitry on this machine BTW.

Problem 2) - The priority - Today when I powered up, a new problem appeared. At first the capstan started turning too fast. It got faster and faster until now - when you attempt to load a tape, the capstan nudges one-way, then back the other then stops. This causes the lace to abort and the tape is ejected.

In the absence of a service manual, I adjusted the "capstan freespeed" pot which did make an effect but was running too fast to use this to correct.

I also checked the capacitors in this area of the board. All okay.

I did notice some oxidisation around the IC on the capstan motor assembly which made me think about this area. I assume this type of capstan has a hall-sensor? Would you suspect this given the gradual speeding up then the observation of the capstan moving slightly one-way then another on "PLAY" then stopping? We talk about the hall-sensor on the head-drum, but never on the capstan assy.

Thoughts?

Rob

Rich
Thursday 12th April 2018
12:54 pm U.K.

[email protected]

Hi Dominic.

Thanks for the reply.

I shall take a look shortly.

Thanks again

Rich.

Dominic
Thursday 12th April 2018
11:18 am U.K.

[email protected]

Hi Rich,

Pinch rollers for the first generation V2000 (VR20xx) are available on www.mfbfreaks.com

Terra Banhart
Tuesday 10th April 2018
6:16 pm U.K.

[email protected]

Hi everyone

I bought a Betamax at an estate sale about 2 years ago.

Well, finances got tuff finally and I want to sell it. Last night I went searching for

answers on my machine. Couldn't find it. So, I typed in the numbers of my machine FCC

and low and behold it comes back could not find. I contacted Fcc and they said I can sell it

so Here are the numbers on the back of the machine. It is UHF and VHS the silver nobs are side by side not up and down. and there are numbers etched into. Looks like its never been used. The numbers on this on the back are as fol

lows FCC AEZ9YB VCR 50/50

SILVER SANYO

AND HAS A WEIRD LOOKING SPIDER NEXT TO IT

SO ANY INTERESTED BUYERS CAN CONTACT ME FOR PICTURES AND MORE INFORMATION

THIS EMAIL IS GOING OUT TO DIFFERENT PLACES AS OF TODAY.

GOES TO THE HIGHEST BIDDER

Rich
Tuesday 10th April 2018
10:57 am U.K.

[email protected]

Hi everyone.

I know this is the wrong board to post this but seeing as the v2000 chat page is not very well frequented I'd thought I'd ask here.

I'm in desperate need of a NOS pinch roller for a Pye 20vr23 (Philips vr2023 ) v2000 vcr please. The original on mine is totally hard with a shine over the surface. Even my trusty Rubber Renue can't save it and it's causing problems with the DTF and picture search modes.

Thanks again and sorry to post v2000 on here.

Regards

Rich.

K lambert
Saturday 7th April 2018
1:57 pm U.K.

[email protected]

Hi Phil

I have seen your message and will e-mail later today.

Been very busy (as usual) :)

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

P McKeown
Saturday 7th April 2018
1:46 pm U.K.

[email protected]

Hello, Kev.

Not sure if e-mails reaching you on your .net account. Having problems with the NX100, although the 5150 to which you fitted replacement display and video heads is still working fantastically well...no surprises there!

Any chance you could e-mail me back when you have time?

Best wishes.

Phil

Fivos Sakellis
Sunday 18th March 2018
8:38 pm U.K.

[email protected]

Hi Miguel.

Check the rubber idler wheel that turns the supply and take-up reel tables.

K lambert
Sunday 18th March 2018
4:34 pm U.K.

[email protected]

Miguel.

They didn't do a V51 in the UK.

What country are you in?

AS for your question.Could be many things.

Worn belt's, bad rubber idlers,but as I'm unfamiliar with that model, I'm not going to be able to assist in the way I would like.

....Kevin

Miguel
Friday 16th March 2018
8:11 am U.K.

[email protected]

Hello, I have Toshiba V-51. The unit plays well, but when eject tapes, VCR eats tapes. Anyone knows the problem? Many thanks

Noel Higgins
Wednesday 7th March 2018
7:54 am U.K.

[email protected]

To the guys in UK.

This looks like a bargain. See SLHF950 on eBay.

https://www.ebay.com.au/itm/Sony-SL-HF950-Super-Betamax-Video-recorder-in-good-working-order-see-notes/323105973760?_trkparms=aid%3D222007%26algo%3DSIM.MBE%26ao%3D2%26asc%3D20140106155344%26meid%3D9f05edf32ab345f48368f47314701dee%26pid%3D100005%26rk%3D6%26rkt%3D6%26sd%3D112540673590%26itm%3D323105973760&_trksid=p2047675.c100005.m1851

regards Noel

DAVID BRUNNER
Monday 5th March 2018
6:24 am U.K.

[email protected]

I put in Betacam chat a message that can are interesting

Bjorn
Sunday 25th February 2018
12:54 pm U.K.

[email protected]

Hi Bernard,

very very common on C6s. There's a lot going on with these machines making they extremely stubborn with repairing. I'm still working on my two. Check the caps again, and have a look at the IC. Have you changed all the belts? Sadly can't advise further as I've run out of ideas on my own machines.

K Lambert
Friday 23rd February 2018
1:52 pm U.K.

[email protected]

Gerhard has now reached me via e-mail.

.Kevin

Gerhard
Friday 23rd February 2018
10:49 am U.K.

[email protected]

Hi Kevin Tried to reach have two machines for service can you please get in touch with me your email bounces back. Regards

Gerhard

K Lambert
Thursday 22nd February 2018
5:31 pm U.K.

[email protected]

Dominic:

Not sure what country you reside in but there was someone selling the VTC 9300 belt kits on E-bay for quite some time.

Also it is possible to replace each belt by measuring them. I did this for one guy who was having difficulties here in the UK.

Sometimes you have to be flexible with these things now as sadly belt KIT's are not that common anymore.

Have you tried Donberg electronics based in Ireland. They can still get these items for some models.

Also CPC.co.uk also sell flat and square types belt's individually.

As for your comment about 'second generation Sony's' they may not have belts but they sure do suffer with broken plastic gears (which are even harder to source)and other annoying issues and make Sanyo models look very reliable in comparison.

Good luck with your venture.

..Kevin

Dominic
Thursday 22nd February 2018
3:59 pm U.K.

[email protected]

Ok, well sadly i've been looking for these belts for three months now. Ebay and the known US, UK, Australian and Dutch sites got none in stock. Machine will be scrapped for parts since it has a brand new set of audio and video heads (ex Dutch broadcasting agency machine).

Thats why I stick to second generation Sony machines, no belt issues.

Rich
Wednesday 21st February 2018
7:26 pm U.K.

[email protected]

Dominic...

Sometimes on eBay UK you can find the belt kits.

I bought 2 kits last year and they were very good quality. I've only used 1 kit, I still have a spare kit.

Rich.

Dominic
Wednesday 21st February 2018
3:52 pm U.K.

[email protected]

Can anyone tell me if there are still belt kits available in Europe for the Sanyo VTC-9300?

K Lambert
Tuesday 20th February 2018
6:42 pm U.K.

[email protected]

Fivos:

If you look again at his post he's already done that:)

.

Fivos Sakellis
Monday 19th February 2018
8:25 pm U.K.

[email protected]

Hi Bernard. Your problem is the most common one with all C6 's. Replace all the electrolytic capacitors in the servo (SS-9) board. Adjustment of the drum and capstan servos may be necessary.

Fivos

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

[email protected]

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

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

[email protected]

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.

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

[email protected]

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
10:36 am U.K.

[email protected]

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
3:12 am U.K.

[email protected]

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

[email protected]

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

[email protected]

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

[email protected]

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
1:39 pm U.K.

[email protected]

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
7:56 am U.K.

[email protected]

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
12:15 am U.K.

[email protected]

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

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

[email protected]

Rich:

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

.....Kevin

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

[email protected]

Hi Kev.

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

Regards

Rich.

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

[email protected]

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
8:09 pm U.K.

[email protected]

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.

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

[email protected]

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

[email protected]

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.

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

[email protected]

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
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.

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