Victor TT 801
without a service manual or a schematic diagram no good technician wastes time to rebuild the diagram ...... time is money all over the world.
ha ha haa...shure!! For me the discussion was already closed 2 years ago .... I have not resurrected the 3ad. |
Obviously you don't, otherwise you wouldn't spend all this time on audio forums asking the same question. There are in fact places in Japan where you could source a manual, but your lack of understanding of Japanese language and culture will unfortunately be a barrier. Best you bin the TT801 and then all your troubles will be over. |
@pindac Japan /home shipping costs have increased significantly in recent months; now everything has become anti-economic. |
I very recently imported a second SP10 MkII from Japan, the shipping charged post COVID was approx' + £200 without any added taxes. I believe these air freight rates are still rising, as Sea Cargo is severely delayed and fuel is heading to the stratosphere. It is best to have a shipping cost worked out in advance, due the these substantial cost increases rapidly developing.
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@lewm No dear Lewn... the lab supports English too language. |
@dover I am not interested to amp repair in Japan to do a turntable repair or maintenance ..... by my ability I know how to do it myself. |
AMP Repair Studio in Japan can do a complete rebuild on JVC TT-801’s - see here for example http://amp8.com/amp-etc/record/victor/tt-801.htm
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@best-groove ahhh...
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@lohanimal I can try since I have been looking for it for a long time; but I am pessimistic because not even in Japan since the 801 was intended for the domestic market only is available. I've scoured the world. |
@best-groove try wilkinsons in Lancashire UK. They have the JVC museum and worked on my two tt101's ask for David and mention that they were recommended by me 'Lohan'
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The TT-81 sm shows a single PCB in the explosive view. In section 11, only one half-moon shaped board named TAS-19C is described fpr layout & components. My TT-801 has two larger half-moon shaped boards plus another smaller one between those two and the platter. Which speaks for the theory that TT-801 is a higher-intergrated version of TT-101 |
It’s silly to argue about this. Obviously a swollen or leaky cap has to be replaced. By “leaky” we mean both electrically (leaks DC voltage) or physically (leaks fluid). I can’t recall what happens to the capacitance of those tiny types with values under 5uF, so I don’t doubt you. And I agree you do find those in vintage DD turntables in-circuit. Typical PS lytics in the range 50 uF and higher exhibit a rise in ESR as they age, whether uF goes up or down. |
@lewm I have to deny you, small electrolytic capacitors for example from 1 - 2.2 - 10 uF at the measurements, they showed me not only an increase in the ESR or in some cases also identical to new capacitors, but rather values in uF increased by 40/50 % and this factor together with other negative aspects (inflated condenser, loss of electrolyte) determines the old age of these components. |
What increases when lyrics age is ESR. The capacitance per se most often falls based on my experience with my Sencore L75 meter. Anyway I was speaking of PS capacitors only. If they have aged sufficiently to alter DCV delivered to the servo, etc, anything goes. If a prior user did a calibration with bad lyrics in place then of course you’d have to recalibrate. If the unit was never recalibrated from new then maybe you’d be ok after replacing caps that have gone bad. So maybe I should not have used the word “should”. “Might” not need recalibration would have been better. |
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Chak, No one is infallible. I was just pulling your leg, as we say in English. The TT801 should not perform any better than a TT101 except by virtue of its vacuum mat. The fact that it uses ICs in lieu of some discrete transistors found in the TT101 might make the TT801 even more difficult to repair, as the ICs may no longer be available. As you know, you can apply an Audio Technica vacuum mat to a TT101 and expect a result similar to the TT801. That's if you can find an AT vacuum mat that still works. |
@lewm maybe i was wrong, but simplified circuit and model number speaks for itself. Also i remember some other users posted that it's closer to TT-81 or almost identical. Since i never owned TT-81 or 801 i'm not sure. But i have two TT-101 and i never heard there was a better model than TT-101. We need more information. |
So my original hunch that the 801 could be a 101 that uses more ICs and fewer transistors now looks to have been correct . But chakster was so certain the electronics were from the 81.... Replacing the electrolytics in the PS should not necessitate a recalibration. And ought to be done. Film capacitors in the rest of the circuit do not usually fail and can be left alone. It would be ill advised to replace ICs if the thing is working. Good to have spares available however. |
@chakster first of all the TT801 is much more simplified as components and less chaotic for assistance than the TT-101, then it does not have oil inside the spindle but grease. If it sounds better it will be difficult to prove, but it is so fascinating. @dickson it seems incredible that in the world there is no service manual for this damned turntable. |
I have a TT-801. It was supposed to be an update of the TT-101 to allow vacuum suction of the record onto the platter. In order to achieve this they utilized more chips than the TT-101 and thus you will find the circuit board is less cluttered and contains fewer transistors. In addition there are maybe only one or two trimmers (from memory?) that need adjustment as opposed to the half dozen or more on the TT-101. I recapped myself and wrote to Japan requesting purchase of a service manual but was told that there was none available. I even had my Japanese friend in Tokyo look for a service manual for me but he said there was none. I think this model was only sold in Japan but I am certain that service centers there would be able to service this. My TT-801 seems to work perfectly but just like best-groove I will never know if it is working optimally after the recap. |
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This is TT-101 from the same source |
See this link: http://www.thevintageknob.org/jvc-TT-801.html The TT-801 is stated as using more ICs than TT-101. It replaced the TT-101 as Victor's flagship and the specs are TT-101 level or better. |
if it ain’t broke don’t fix it. perfectionism is a curse. I am a retired interior designer, 46 yrs new headquarters, corporate Interiors, NYC, other big cities. Every project I tried to make good, better, best decisions for my clients, the more I learned, the harder it got. I learned not to bring that progressive attempt for perfection home. after a bit of hopping about, I decided to stay the heck away from tt101, get the tt81. Like my Jaguar, people who went for V12's instead of V6 were/are masochists IMO. Actually, the V6 beats the V12 off the line, the V12 only besting V6 at high speeds. Fastest ride I ever took was 140 mph in newly paved rt 78 in that Jag, smoothest ride and smoothest braking I ever experienced. like this one, except tan top http://smclassiccars.com/jaguar/142655-jaguar-xjs-convertible-40-xls-kingfisher-blue-metallic-1994-83000-miles.html magnificent color, we flew to Kansas (from NJ) to buy it, drove it home thru 5 mountain ranges late spring, what a trip that was. |
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just curious, do you have one, or thinking about buying one? working? not working? Elliott, i have two of them, both working 33/45 and been tested for 3 days constantly (nonstop) all the way on both speed. The one in original plinth for two tonearms must go somehow to a new owner, i just don't need so many turntables, my favorite are still Luxman PD-444, so i can't put another two Victor near my racks anyway. I bought original small plinth for one of them and i want to keep one. Hard times anyway. I think every Victor can be calibrated and recapped, mine are fully original, no one touched it. A qualified vendors prefer to work with fully original units when it's time to fix something. |
Bestie, Yes, the TT101 is much more complex electrically than a TT81. That was the point of my last post. Since Chak is a thorough researcher, I would suppose he is correct about the TT81 innards. But there is a third possibility: it may be TT101-like but use more ICs where the TT101 used discrete transistors. That would be one way they may have reduced the interior space needed for the TT101-like circuit, in order to fit the vacuum system. For that you need a smart person. I recommend JP Jones, to be found at Fidelis Analog. |
Before Chak posted, I would have said it's a TT101 with vacuum platter, not a TT81. But if you look at the cross-sectional views on Vintage Knob, you will see that much of the interior space is taken up by the vacuum system, which when I first saw the pictures made me wonder how on earth they can fit all the TT101 electronics in there. So, if it's a TT81, that makes more sense to me. In any case, if it's a TT101 electrically, that service manual is also available on VE. So, you are covered either way. I think it does state on Vintage Knob that it is a TT101, electrically, but VK is not infallible. |
@elliot many thanks for your information, I will try to contact your seller and also Foxtan but I have doubts they may have a service manual.I tried to contact a couple of times 6 months ago also a repairman who recapped and calibrated a TT 801 but never replied and this creates great displeasure to me .... yet it is said that the Japanese people are friendly!! http://amp8.com/amp-etc/record/victor/tt-801.htm Usually a recap necessarily implies a calibration but without service manual you cannot proceed casually. @lewn @chackster I doubt it's like TT81 but I will check |
If chakster is correct, and what he said makes sense, then all you need is a TT81 service manual, which I believe is available on Vinyl Engine for free.Think of the TT801 as a TT 81 with a separate vacuum platter system built-in. I was able to get a TT101 service manual from VE, so you should be fine. |
seems Audio Video Consultants is still around, they might have some advice https://wired4sound.com/ This is gorgeous https://www.vinylengine.com/turntable_forum/gallery/image/14124 |
now I'm worried about my TT81 after seeing the guts here https://www.google.com/search?q=jvc+victor+801+site:www.vinylengine.com&sa=X&rlz=1C1SQJL_enUS881US881&biw=1707&bih=888&sxsrf=ALeKk00mP6S-TSEoz1V5MY56GU7FnODZ4Q:1584886032352&tbm=isch&source=iu&ictx=1&fir=2E44kwkaxg8uyM%253A%252CIvEfMVLVVuo4_M%252C_&vet=1&usg=AI4_-kSU0M8huqOvfU4F6-SqxB2ikDbwJA&ved=2ahUKEwj91t7HoK7oAhWVhHIEHQeLCcwQ9QEwAHoECAoQBQ#imgrc=2E44kwkaxg8uyM: |
OMG, former thread here, 1,723 responses, Run, Run, Run away https://forum.audiogon.com/discussions/vintage-dd-turntables-are-we-living-dangerously |
