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Weber1600
Thursday 22nd August 2019
5:10 pm U.K.

Seat124

K lambert

With a tape in play mode, I have turned the RV002 potentiometer in both directions of rotation, on the one hand, the tape increases in tension, turning the potentiometer in another direction, the tape loses tension.

But unfortunately the image on the TV screen is still black.

The counter does not work in play mode, and in Rec mode it does not work.

The rest of the functions are correct, just like previous weeks.

Gabriel
Thursday 22nd August 2019
2:26 pm U.K.

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Noel and Kevin,

Thanks for your feedback, it is always good seeing your comments here.

Regarding the SL-C9 's tape remaining feature, there is something that catches my attention: It is suppossed that amount of tape is calculated through the relative spinning speeds of both take up and supply reels (as most modern VHS machines do), so what role is here playing the back and forward tensions on the machine?

The only chance I imagine is that the CTL pulses are being taken into account but that screws me a bit in the event of recording a blank tape.

Any info is always welcome.

Regards,

Gabriel

Matt
Tuesday 20th August 2019
1:35 am U.K.

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Thanks Kevin.

For make a recording with my SL-3000 to inject a input to K connector,

what type of connector, or pin plug i needed?

Thanks.

Matt

K Lambert
Monday 19th August 2019
9:57 am U.K.

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Hi Neville :)

Matt:

Normally that switch states INput - OUTput - Tuner.

IN is for allowing a signal to come IN from another source.

OUT is for that machines signal to be fed OUT to another source and TUNER is for using the internal RF tuner.

Hope that helps.

...Kev

Matt
Monday 19th August 2019
12:22 am U.K.

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Hi at all,

Anyone know on the SL-3000E /UB what is the function of picture selector?

Is in three position, on, off, tuner. Sadly, on the net i don't find a

service manual or user.

Thanks.

Matt

Noel Higgins
Sunday 18th August 2019
8:27 am U.K.

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Hi all,

Restoring a capstan pinch roller (rubber) using a Dremel super tool, fitted with a grinding wheel.

(Sounds a bit agricultural but it works well) The action is sort of like a lathe, but both the object (rubber) being machined and the cutting element (grinding wheel) are in motion and because of the angle of attack between the two, that

evens out the abrasion over the surface of the roller.

See my betaheaven.com video at https://www.youtube.com/watch?v=adYr2B0z--c

regards Noel

Noel Higgins
Sunday 18th August 2019
8:17 am U.K.

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Keith,

Hello all - its been a while - I have been busy plus traveling recently. (I did not see any Betas in Russia)

GENERAL COMMENT

Regarding adjusting the back tension on the Sony SLC30, SLC40, SLF30, SLHF100, (etc) the felt band is the course adjustment. This is a pain to get to and trial and error pulling out the reel board and putting it back each time. (unless you have worked out an easier way) I always use a blade to scribe a line on the reel chassis next to the plastic mounting block to show the starting point for adjustment so I can restore the original if needs be.

The fine adjustment is more accessible. The spring mounting point on the "black plastic - toothed pivot arm" is accessible from above using pointy nosed pliers and most times (if you don't bend the end of the spring open when breaking the green glue sealing it in place) you can move the adjustment to the maximum setting point tooth toward the rear of the machine and on average that takes the machine from a "relaxed over time" spring setting of 30gm to the required 35gm.

SLC9 BACK TENSION ADJUSTMENT.

You do indeed have to adjust RV002 on the SS11 board which controls the back tension through the supply reel spool motor. Hard to read an adjustment tape on these machines as the top of the assembly is covered in. I use a test tape prerecorded with a 1kHz tone and test pattern. I look at the tape tension sensor arm and make sure it is not hard up against the main assembly of the pivot arm during playback. The sensor arm usually trembles near to that assembly. I increase the tension until I notice a slight warble in the 1kHz tone or momentary changes in pitch during playback and I back the adjustment off until that stops. I know that is not how they say in the manual but that works best for me. You want high back tension so that you get optimum audio from the now one third width left and right audio tracks plus the guard band gap (compared to a mono machine audio track width) and tape edge ripple, caused by the stress of being used in a misaligned machine, is your enemy when trying to get the best playback for transfers.

regards Noel

Amiga
Saturday 17th August 2019
8:04 pm U.K.

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Sorry its Sony SL-T9

Amiga
Saturday 17th August 2019
4:23 pm U.K.

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Hi Every one , I have problem with my SL-C9 during playback picture only B&W. but every thing is working fine ..

K lambert
Saturday 17th August 2019
1:41 pm U.K.

Oh and in case you were wondering ALL forward torque adjustments on the Sony's are on the SS boards they just have different numbers for different models.

.Kev

K Lambert
Saturday 17th August 2019
1:31 pm U.K.

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Weber1600:

Here are the details for your Sony C9 reel back tension settings...........

The board is SS11 (directly under the bottom case under the reel spool area).

The adjusting pot for the back tension is RV002 (it will have a small B T near this and is near the centre edge of the board). Don't alter RV 001.

What you will have to do is remove the bottom cover. Place a very small flat blade screw driver in the adjusting pot of RV002 ONLY. Stand the machine on it's side or upside down with a tape playing inside inside(it will still play OK. Turn this pot slowly to the left whilst playing and see if the tape remainder stays lit and it doesn't stop.

If it does continue until it doesn't stop and try the other direction as well but small adjustments only.

The back tension spec for the C9 is 45- 48g-cm. If you get it in this range then all should be fine. There is no back tension band on this model (or the SL1700) as both spools are motor driven).

Having the Sony tension tape (SL0003C) is ideal but not many have access to that but on the C9 when this is correct it will be trouble free.

The back tension spec for the SLHF950 is 40-48g-cm and can ONLY be adjusted by a back tension band (which is more fiddly down to the linear skating having to be ejected e.t.c).

The back tension spec for the SLF30 is 31 - 35g-cm adjusted by the felt band and the forward tension (adjusted by a potentiometer) is 75- 85g-cm .(This pot is usually identified as TRQ but is RV308 on the F30 ).

The back tension spec for the C40 is 25 - 35 g-cm adjusted by the felt band and the forward tension is 75 - 85g-cm adjusted by the pot number RV 309 on the SS 16 board.

The back/forward tension spec on the SLHF100 is 31 - 35g-cm (adjusted by the felt band) and the forward tension is 60 - 80g-cm adjusted by a pot no RV001 (TRQ) on the SS28 board.

You'd be surprised how many are out of spec. If too tight in the back tension area you do run the risk of advanced head wear over time. Always better to be correct.

Hope all this helps.

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

Weber1600
Saturday 17th August 2019
11:24 am U.K.

Sest124

Gabriel

the pressure roller is checked and clean,

also passed sandpaper 120,

The problem is still in the play mode, it does not take a picture, it also fails in rec mode, it does not record, black screen and counter does not work, it only munitions ok! the remaining tape indicator.

The other functions, Rew, FF, X2, pause, Frame all work correctly.

K Lambert
Saturday 17th August 2019
10:12 am U.K.

David:

This has been brought up before but as far as I'm aware nothing further has been done.

I did find some small plastic gears to replace those black ones that seem to split over time for the loading functions.

As for the metal cassette loading for the C9. No.

Gabriel:

the fact the tape remainder doesn't work 100% tells me it is the back/forward tension that is causing this.

The pinch roller on ALL vcr's should be the first port of call as, unless in great shape, as you say, can cause many play and even worse review issues to the tape and path alignment.

The rubber should be matt all over not shiny, and have no signs of damp issues ,resulting in small bumps,(I've seen that on a few Sanyo's that have been stored badly).

You should be able to push your finger or thumbnail into the rubber and feel the rubber deflect.It shouldn't be rock hard (Sony's seem more prone to that).

It should also spin free and fast.

I always use a flat piece of 120 grit and rub diagonally over the entire rubber area. Keeping it moving slowly as you go. NOT pressing too hard either, just enough so you can see the shiny area be removed revealing the matt part underneath. Keeping the grit paper and pinch roller flat at all times to ensure a perfectly flat surface.

Hope this helps?

...Kevin

David Etheridge
Thursday 15th August 2019
10:05 am U.K.

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Hi folks,

excuse me if this seems like a daft question, but:

Has anyone investigated 3D printing for the replacement plastic gears for the carriage mechanism for C9s, C20s etc?

Or failing that, has anyone investigated a toolmaker who could produce the replacement metal ones?

Thanks in advance,

David.

Gabriel
Thursday 15th August 2019
9:59 am U.K.

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Weber1600,

You should also have a look to the pinch roller. As this element ages, the rubber surface becomes brittle and the machine develops troubles with CTL tracking as yours. Even more, the internal bearing might be defective and could be the silent culprit of your issue.

You can begin by sanding a bit the rubber surface of the roller, quite gently with a soft sandpaper ( 800 or 1600 grade would be OK).

If you have access to another machine such as SL-C20 or C30 you might try to swap the pinch rollers and see if this helps.

I think this is the easiest (and cheapest) solution you can check.

Regards,

Gabriel

K Lambert
Wednesday 14th August 2019
1:18 pm U.K.

Weber1600.

Yes,yes and E-Bay.

Will get the actual adjusting pot and number for you as soon as I have time.

.Kevin

Weber1600
Monday 12th August 2019
2:31 pm U.K.

Seat124

K lambert

Does it mean that the tape tension is incorrect?

It's on the SS board

Where do I get that Sony Slc003 torsion tape?

I am in Spain

K lambert
Monday 12th August 2019
10:36 am U.K.

Weber1600:

Your back/forward tension is out of spec.

On the C9 it has to be spot on otherwise you will have tape counter, tape remaining indicator and also picture issues in various modes.

I believe it's around 48gm but will get back to you on that.

I will also find out the adjusting pot. It will be on the SS board. I wouldn't alter ANY other one though as the Sony's are particular in that area if fiddled with.

You will need the Sony Slc003 torque tape for the perfect result as it's hard to gauge without this.

Where abouts are you?

...Kevin

Weber1600
Sunday 11th August 2019
8:15 pm U.K.

Seat124

K Lambert

The rest of the tape indicator works occasionally, almost never,

The counter timer only works on Rew, FF, X2.

The slow motion works fully

In frame 1 function the image appears and every two seconds snow appears in the image, but the counter still does not work.

K Lambert
Sunday 11th August 2019
5:57 pm U.K.

Rich:

I thought that would be where the issue was.

Weber 1600: One other thing ,does the tape remainder indicator light up and does the slow motion work?

Let me know.

.......Kevin

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