Sony SuperBeta SL-HF900 part 3. A spring thing.

[@more.power.]

This KZbin video helped me gain the skills to fix my own NTSC SuperBeta recorder. In Part 3, the front loading issue was addressed, providing insights to resolve it. I also learned about the machine's role as a backup to the SL-HF600 and its ability to play BIs High Band SuperBeta recordings. The correction mentioned the required nut spinner size for the drum motor disk, which is 7mm. Overall, the video equipped me with the knowledge needed to repair my recorder effectively. Thank you

[@Petertronic]

Very good repair with re-phasing those carriage gears (with spring). The other issues are a bit of a mystery to me but glad it's operational for now.

[@t0nito]

Both the pause and the seach faults are probably related as when the pause issue went away so did the search one. I wonder if the fault is related to the screws or if gravity has something to do with it, perhaps a cold solder joint that is intermittently making a connection depending if the unit is upright or sideways and coincidently the connection will make or break when the unit is upright.

[@video99couk]

They certainly are related. But in its present state, they are not showing up and I will leave it that way. I wonder if the machine had those big plastic feet fitted for some reason related to that fault.

[@stpworld]

@@video99coukhow do you keep your digital files orginized when you transfer the tapes to digital?

[@video99couk]

@@stpworld I ask that customers number the tapes, so the files are numbered accordingly. For domestic tapes, I provide DV-AVI and MPEG4 files, in their own folders. I retain the files for a few weeks after the customer has received them, so they have time to make backups, before I delete the master files.

[@zx8401ztv]

The Carriage switch made sense, and the takeup is a rubber tyre perhaps. That right pcb could have a problem with the cable connectors, black pins a common failure. Or a pcb crack. Is the bottom plate pushing the pcb up a tiny bit? Try pushing the pcb up to see if it goes odd. Personally i would just run away lol.

[@video99couk]

Reel drive on Sony doesn't use rubber drive surfaces. I did try pushing the PCB in the YT video but the fault didn't occur. I'm inclined to leave it alone, it's working reliably now. I'm about to order a 100V transformer and will likely be doing a short video about that.

[@crashbandicoot4everr]

I think the reason the VU meters aren't reading the same level is because you're playing a mono tape and this machine has linear stereo (The North American version is only linear mono). Even the slightest difference in the relative audio head-to-track height can cause this. I have a Hitachi VT-8E portable VHS recorder with linear stereo and I can hear the imbalance between the left and right channels depending on what machine the tape was recorded on.

[@video99couk]

I wasn't aware it had linear stereo, I'll have to take a look at the audio head one day.

[@crashbandicoot4everr]

@@video99couk Believe me, it does. The service manual for the Japanese HF900 shows that the audio head plugs into CN351 on the board AU-13, and it shows two seperate audio heads on the diagram labeled CH1 and CH2. I believe Japan was the first country to broadcast TV in stereo, and that's the reason cosnumer VCRs with linear stereo existed there since 1979, or even earlier than that.

[@160rpm]

could it be that it's a stereo audio head reading two different parts of the mono signal?

[@video99couk]

According to the schematics, it's a mono head, but production changes happen.

[@160rpm]

@@video99couk Ah, well if it's not supposed to have linear stereo then that theory doesn't make much sense anyway

[@rwdplz1]

Typically with this mechanism, the gear closest to the door breaks, and the mechanism timing can't be adjusted properly. There's a guy named Plutonius selling replacements, I've installed 3 so far with success.

[@video99couk]

I think I briefly mentioned that on one of my earlier videos. I've been lucky that neither of my SuperBeta machines has damage to that gear.

[@goktengri9746]

SONY BETAMAX SL-C6ES STEREO modeline dişi girişe RCA uçlu erkek kablo yapmak istiyorum video bağlantılarını bilmiyorum bir videonuzda gösterirseniz sevinirim şimdiden teşekkür eder başarılar dilerim

[@video99couk]

I did not know there was a stereo version of the SL-C6ES. Send a photo of the back panel to me: [e-mail]

[@zhaohaigaogu7821]

There is also a defect in the power IC 【STK ××××】of Sanken Electric Co., Ltd., so I think you should be careful. I replaced the electrolytic capacitor 25V 33μF in the power supply circuit. Heat resistant temperature is 105℃.

[@superbetahifi]

Sorry ignore my previous comment. just noticed it is a Japanese unit which does run on 100 v. But then now I'm wondering why you asked about a transformer for a US/ Canadian unit.

[@video99couk]

I have a 230V to 110V transformer for my SL-HF600 already. What I was asking was if anyone has a 110V transformer from a scrap USA SL-HF900 since then this machine could share the 110V supply.

[@TTVEaGMXde]

@@video99couk How high is the mains voltage in your house now ? MrBetaByte "suffers" from 256V~, and in Hamburg I have the EU-compliant 229.5V~ mains voltage.

[@Ragnar8504]

@@TTVEaGMXde Let's hope it's 230 V +/- 10%, i.e. no higher than 253 V. Unlikely to be below 230 in the UK I think.

[@160rpm]

My guess is that screws are too long haha

[@bobsbits5357]

hi what is the total time you put in to this deck you are 1 of 2 i watch all the time i know you men put alot of time on them you picked up some digi betacam would love to see them and if there was anything bad on them not a had a SONY a500p the front panel has drop to parts to bad to fix and the rest i just to bad so i pull the deck apart as part a put all the good parts away in sealed bins safe i having to pull 12 100ub apart next year they came from a betamax repair place my mate had the sanyo 5000 that came with them 10 of them in a very bad way i think they were a rent out betamax decks just one bvw 75 left as parts to fix up on the betacam sp decks my mother would never let me keep video's out side in the lock up she know's it not good for them space room or some wear that is right for them like you studio down stairs space is a thing i know i keep 15 betacam decks in the hall down stairs to all like LEGO A/V gear takes alot of space

[@video99couk]

I probably spent about 10 hours on the SL-HF900. Time well spent though, it's a very capable machine.