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Chat Page News
Friday 24th March 2017

Please bookmark http://chat.palsite.com/chat_page.py as the new URL.

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Gabriel
Tuesday 13th November 2012
12:18 pm U.K.

gabrigpb@hotmail.com

Kevin,

Thanks a lot for sharing your 'know-how' about Betas' PSUs.

Curiously, I am finding clear examples of what you are showing: a dead SL-HF950 MK-II (I had a spare PSU for it, but still fails on tape ejecting and rewinding), a C9 with no display (DC-DC with its terrible housing) and C30s with wavy lines through the picture.

I am thinking about creating a 'routine service sheet' for every model so as not to forget checking vital points. For example, in a Sony you cannot forget checking the sensor controlling the drum. But I need some amount of time that I don't have right now...

For me, Sanyos are much better machines with best engineer solutions than Sonys (in general, no solenoids, no cracking gears, no bad head wear, less energy consumption...). And most Sanyo cures are based on belts change and inspection/cleaning.

Regards,

Gabriel

Nigel Robinson
Tuesday 13th November 2012
11:48 am U.K.

nbrb0x-3@yahoo.co.uk

Hi Kevin,

Nice to talk to you once more and thanks again for looking after my SLO-1700 last year.

Do you think replacing all or most of the electrolytics in the PSU block will solve the problem? Also do you think a power supply problem like this would cause any degradation in the sound quality?

All the best,Nigel

K Lambert
Monday 12th November 2012
6:50 pm U.K.

kn2000@talktalk.net

Hi Betaphiles:

Interesting notes/comments you make.

From my experience with the Sony and Sanyo beta's.As far as the PSU supplies go Sony's do tend to suffer more than the Sanyo's.Out of the many i have catered for and brought to 110% order.The C9 is the worst in this respect ,especially the DC to DC.It also pays to check and ultimatley change quite a lot in the PSU BEFORE anything else get's damaged.Usually transitors.The SLHF950 seems to be suffering in this area now too and will damage a particular transistor if left too long.The C20 /30 models tends to have one or two of the smaller electro caps failing ,usually causing wavy lines through the picture.The F30 also usually has three or four that are failing.The HF100 usually has quite a few going or gone bad in the dc to dc area too

On to the Sanyo's The worst for failing electro caps in the PSU is the VTC 5000. This is always in the clock display supply area.This may be as this model was likely powered up and in use for quite a few years.The 5150 i have yet to encounter bad caps or ones that have failed.The 'M' series are usually pretty good too.The NX100 always has one failed next too the heat shield ,nearest to the mains transformer.heat is always the cause of theses capacitor failings.

I make it a rule to always check all out now on any vcr i resurrect/service as this will ensure the other areas are given their maximum and correct power supply.It should also guarantee somewhat against any unexpected or catastrophic failings later on.Also always go for reputable brand Electrolytic caps and ones rated at 105 degrees.

Good luck guys and keep up the good work.

..................Kevin

James
Sunday 11th November 2012
1:16 pm U.K.

jlaing35@hotmail.com

Hi Nigel,

Yes I sorted the original problem which was the DC to DC converter had bad capacitor's.

Yes I sorted the original problem which was the DC to DC converter.I had to open the metal case and then replace all the small capacitors inside...

But I now have to replace the capacitors within the power supply as there is now a noise due to the load not being handled and there is a bad smell coming from it... I have replaced of the capacitors but I have to get one from eBay as I cannot find the right size capacitor here locally.

My SLO-1700 does work and will need adjusting but I will wait till I sort out the power supply...

James.

Nigel Robinson
Sunday 11th November 2012
11:49 am U.K.

nbrb0x-3@yahoo.co.uk

Talking about SLO-1700 power supply of course :)

Nigel Robinson
Sunday 11th November 2012
11:45 am U.K.

nbrb0x-3@yahoo.co.uk

Hi James, I have the same problem just started. Hissing sound like gas leaking. The machine is dead at first then comes on after about a minute and is then OK. I believe the hissing sound is the switch mode power supply without a load so that part is probably OK. Some capacitor is probably failing and is slowly charging up, the power relay then eventually receives the correct voltage and switches on. Did you sort your problem? All the best,Nigel

Brendan
Friday 9th November 2012
1:33 pm U.K.

bgc1995@hotmail.com

Actually the questionable arm has nothing to do with back tension. I think it is just a form of tape sensor to detect slackness. Having said that, in my other C6, the arm does not move at all once against the tape in playback. But the one I have replaced the rubber in moves about a little. Could this be a capstan stabilty problem? Not noticeable in playback but noticeable arm movements. The capstan servo still contains Sanyo caps.

Brendan

Brendan
Friday 9th November 2012
11:03 am U.K.

bgc1995@hotmail.com

Hello all,

I have corrected the problem. A small section of the tyre on the take up reel was sticking out slighty. However the back tension arm still moves a little during playback. Would I need to slighty increase take up torque because of the new rubber fitted?

Brendan

Brendan
Friday 9th November 2012
10:06 am U.K.

bgc1995@hotmail.com

Hello all,

Just replaced all the rubber in a SL-C6. But it has developed a problem. Upon playback, within a few seconds, the back tension arm continually moves inward. Eventually so much so causing a tape loop and the VCR to stop. The short playback is perfect however. Any ideas?

Brendan.

ElichArilia
Wednesday 7th November 2012
7:21 pm U.K.

fffvvv@tesiov.info

Funny Sheet - <a href=http://www.youtube.com>;YouTube</a> http://www.youtube.com

Gabriel
Tuesday 6th November 2012
8:13 pm U.K.

gabrigpb@hotmail.com

Dropout comp adjusted with no improvements, delay line swapped and still the same issue. Finally I have fitted a set of heads from a scrap C30 and problem solved. Now it gives a great image with full color.

Thanks again,

Gabriel,

Gabriel
Monday 5th November 2012
8:09 pm U.K.

gabrigpb@hotmail.com

Kevin,

Thanks a lot for the tip. I need having a look to the service manual because I don't have a clue where that pot is located (I guess in the video board, but not exactly). Could it also be caused by a bad delay line (DL001 as listed in the technical area of this model)?

Thanks,

Gabriel

K Lambert
Monday 5th November 2012
11:41 am U.K.

kn2000@talktalk.net

Hi Gabriel

Try adjusting lightly the drop out compensator.if that does'nt help then it could be excessively worn heads or bad tapes (scratched too maybe ).............Kevin

Gabriel
Monday 5th November 2012
8:48 am U.K.

gabrigpb@hotmail.com

Good morning Betaphiles,

Does anyone know a remedy for a SL-C30 showing random horizontal noisy lines when playing? I've tried changing the PSU with no results, moving also the tensioner arm (by hand) just in case it were a tape tension issue. Heads and tape path are clean.

As always, thanks in advance.

James
Sunday 4th November 2012
10:41 am U.K.

jlaing35@hotmail.com

It looks like you need to take things apart to get that belt out, I am not keen on that idea yet... I cleaned the belt which has helped but still needs to be changed...

James

Brendan
Saturday 3rd November 2012
10:56 am U.K.

bgc1995@hotmail.com

All belts and tyres with the exception of that one. The original is still good in my C7. Plus it isn't the easiest to replace. You could probably place the VCR on its side with both top and bottom exposed. And use tweezers to help fit the belt.

Brendan

James
Saturday 3rd November 2012
9:16 am U.K.

jlaing35@hotmail.com

Brendan,

You replaced all belts?I was wondering how you replaced the belt on the botton that drives the loading mech and ring?

James

Brendan
Saturday 3rd November 2012
4:17 am U.K.

bgc1995@hotmail.com

Never mind everyone. I have corrected the rewind fault. Brendan

colin judd
Saturday 3rd November 2012
2:06 am U.K.

garnetjudd@bigpond.com

iHAVE FOR SALE A SONY SZL 100 AS BVETA PLAYER WITH REMOTE AND MANUALALSO 3 BOXWS OF MO,I LIVE IN Robina qld australia

Brendan
Friday 2nd November 2012
11:32 am U.K.

bgc1995@hotmail.com

Hello all,

Just finished replacing all the rubber in a SL C7. Rewind and review still fail to function. When engaged, it tries to rewind and the drum makes a whirring noise. Would this be an open inductor(L2) on the SY-11 as stated on the tech page? And more so, advice on accessing the coil.

Brendan

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