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Một bản sửa chữa dài và nhiều chỉnh sửa để cô đọng trải nghiệm xuống dưới một giờ, nhưng đáng giá. Hãy để tôi cho bạn thấy bên trong và bên ngoài của Bộ hẹn giờ kỹ thuật số Sony DT-30, một bộ dụng cụ sang trọng từ thời mà ngủ gật trước TV là một điều thú vị – và thức dậy với TV hoàn toàn là một điều gì đó mới mẻ. Quay trở lại phong cách của những năm 70 …. và tận hưởng! Tham gia Team FranLab !!!! Trở thành người bảo trợ và giúp hỗ trợ Kênh YouTube của tôi trên Patreon: #ElectronicsCreators #SONY #TV – Âm nhạc của Fran Blanche – Frantone trên Facebook – Fran trên Twitter – Blog Khoa học của Fran – Trang web FranArt -.
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Repairing The Sony DT-30 Television Snooze Box
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Repairing The Sony DT-30 Television Snooze Box.
dt sony.
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Trivia time Fran. Sony are famous for their "rubber latex snot" that goes conductive over time due to heating cycles. Highly likely it was leaking current across that olde green fluro neon lamp connect pins & helped cook the series 33k resistor…
As several people have already commented, this was a Sony Betamax timer from the mid to late 1970's. My father had one of these with the first VCR we ever had – the original Sony Betamax. The deck didn't have a built-in clock or anything. It had piano keys like an old tape recorder, not buttons. Still, it was amazing technology in it's day. The clock was an accessory for making unattended recordings at a later time. After setting the timer with the time of the program you wanted to record and setting the channel, you would press the "record" and "play" keys with the power off. When the timer switched the machine on it would start recording the program you selected. What was even more amazing is that since the original Betamax L-750 tapes were only 90 minutes long (not quite long enough for most movies) Sony created another accessory called an automatic tape changer. This was a completely mechanical device. It didn't plug in to the wall, it had no batteries and no electronics of any kind. It would sense the end of the tape when the keys popped up and then it would push the "eject" key, wait a few seconds for the first tape to eject, pull the ejected tape into a holding tray and then it would drop a new tape into the tape tray, push the tape into the mechanism, push the mechanism down into the machine, wait a few more seconds for the machine to thread the new tape, and finally it would press the "record" and "play" keys at the same time to continue recording on the next tape. When you loaded the fresh tape you had to pull down a lever which stored energy in a spring. It was enough for a complete tape change cycle. The whole process took about 15 seconds and it was fun to watch. It was like watching a Rube Goldberg contraption. It was clearly designed as an afterthought and it was amazing that it worked so reliably. How far we've come since those days!
Neon bulbs tend to darken with time, AFAIK not from carbon, but metal deposition inside the glass capsule.
Cute. As a teenager, I built one of these myself out of a flip-digit clock, to turn my stereo system on and off with the timer. The SPDT microswitches inside allowed me to configure the alarm timer and sleep timer to turn the system either on or off at designated time. As I remember, the alarm was active for about two hours, plenty long enough to play an LP record, and would have been long enough to fill a SP video tape, except that consumer VCRs weren't even a thing yet.
Niiiiice looking thing!
Had one of these that I never could get working right again! Glad to see one in more capable hands
Put the synchronous motor on a warming plate for a coffee cup. Warm it up. Put some light sewing machine type oil around the gear, then let it cool -it'll pull the oil inside. Repeat that a few times. That'll dilute out the more gummy fluid inside the motor.
The 0 jewels is because this is a synchronous clock, which obtains its sync from the 60hz (or 50, depending on the motor), rather than from a balance wheel in conjunction with an escapement. The jewels were usually synthetic ruby that were used as bearings with extremely low friction. Pocket watches had between 7 and 23 jewels, with some going nuts and adding more just to add them. 7 was usually enough to make a well lasting watch or clock. Cheap 'dollar' watches had no jewels.
When they started moving to the synchronous electric clocks, and then the quartz watches, they reverted to saying "no jewels" to make sure people understood that these were not standard wind up clocks. Some of the better quartz watches do have jewels for the bearings, as they do still have the same mechanicals inside, just a different method to keep the time.
Most synchronous motors don't have grease in them. They were filled with oil. The oil just loses viscosity over the years. If you check the clock forums, you'll find that most of those clocks were really intended to be 'serviced' every 10 years (often replacing the motor assembly). Instead, they were left running for decades.
You are just like all of us Fran Fans. We don't settle. It is perfect or it is in the junk bin. (The one we have in our house. We keep almost everything. (No Styrofoam. We can get that at MacDonald's). You have mastered this 1970's ish masterpiece. (My stab is 1973-74).
Fran, You Are Like a Surgeon. I was thinking of a song, but it is a spoof. And you are not actually cutting. For the very first time..Weird Al!! You Punster, You!
Wikipedia says this about green neon lamps: A mixture of 95% neon, 2.5% krypton, and 2.5% argon can be used for a green glow, but nevertheless "green neon" lamps are more commonly phosphor-based.
I really enjoy your videos and I should watch more of them 🙂 you are awesome Fran. A wonderful lady who loves working on electronics, a lady after my own heart 🙂 i’m curious what is your background? Did you have a career in electronics or engineering? My background is a little bit of both I was just curious 🙂
I like how Fran breaks all the rules.
I noticed that the am/pm indicator was not showing green,,,maybe there,s another burnt out neon globe in there?
why i have a liter in my shrink tube trays
Use bright LED's for the whole thing, Just use a driver board for all.
Фран любит "цифровую" технику!
Fran loves "digital" devices!
I knew that minute digit was gonna look like crap. Surprised you didn’t check it out before reassembly. 🧐 “Fran why didn’t you check the illumination out before re assembly?” 😂
Hi,having watched many of you videos I know how you are obsessed with nixie tubes and displays, yes I like them too I used to build frequency counters and digital clocks, my very first clock used bridge rectifier to double the 50hz mains freq to 100hz to divide down to 1hz, now my latest have a 16mhz crystall osc.
my home made freq counter has a 5mhz reference and has 7 segment led displays. I still have and use two venner/maldon electronics freq counters that use nixie displays, that was the company I used to work for back in 1967-1970. I also worked for REVOX repairing tape decks and amps. I am retired but still do electronics. keep up your good work, very interesting videos.
I have one of these. it's branded as a zenith and came with a Betamax VCR my parents bought when I was a kid.
Fran!!!! Use LEDs!! Power up some green LEDs with AC power across a full bridge rectifier, without electrolytic filter. You will get the same 120Hz shimmering light as the neon bulb do. Neon buld are shimmering at the double of the grid frequency, because they glow at the positive peak as at the negative peak, reversing the glow from one electrode to the other.
Most of my higher end tape recorders have a timer switch that will start recording as soon as power goes on – a lot of them pre-date video recorders.
Look's awesome!!
Flat blade? FLAT BLADE?! Oh please! C'mon Fran! As your excellent take on plastic threads;, spinning the driver backwards before forwards (which should apply to any threads plastic or metal) surely PLEASE(!) use a JIS screwdriver! This is a Japanese unit, and has screw heads with the dot next to one of the splines. Please, pretty please, buy a set of JIS screwdrivers! Anything Japanese you repair will thank you for it! Loving your work BTW!
You need some JIS screwdrivers
37:45 hot air from a fine nozzle is best for shrink tubing. you can use just the minimal required temperature instead of an open flame or bulky and hazardously hot soldering iron near delicate parts.
nice watching you repair that Fran nice gob well done
That vaping fluid smell is the same with ebay stuff here in the UK too, Fran.
When I was a mail carrier I hated delivering vape juice the whole car would stink for a day after