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  #1  
Old 07-20-2014, 05:59 AM
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Repair Blog of a 1967 Sony Chromatron

Hi to all,

Exciting stuff!

First internal/external photos ever of a 1967 Sony Chromatron color TV.
17 photos so far. Seems to be an all-tube chassis.

The Sony 19C-100 belonging to the Japan Radio Museum has been entrusted to Japanese friend N. Tezuka to make it work again.

Follow the endeavour by reading his blog:

http://translate.google.de/translate...Fvrc-tezuka%2F

Please keep in mind that Google's Japanese to English translation is, well "creative".

Later day update from info received from Japan:

CRT diagonal is 480mm/19"
CRT type is 480AB22
2x EHT rectifiers used: 1 for HV and another 1 for MV* (6.3KV) and FV* (4.1KV).
Also thinks it's a 3 gun tube, therefore not a true Chromatron.

*MV: Medium High Voltage
*FV: Focus Voltage

The Sony Museum Chromatron TV is a 19C-70 and this one is a 19C-100, therefore a new unidentified model with a smaller screen.

Best Regards

jhalphen
Paris/France

Last edited by jhalphen; 07-20-2014 at 11:45 AM.
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Old 07-20-2014, 07:34 AM
JBL GUY JBL GUY is offline
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Very interesting.

Thank you for the link.
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Old 07-20-2014, 08:39 AM
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Jerome, I DON'T know where you find all this stuff, but I'm VERY glad you do, & that you selflessly always share it w/us !
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Old 07-20-2014, 02:42 PM
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Cool! Thanks for posting!
I don't get why they would be using what looks to be a delta gun in a Chromatron design... very strange!

jr
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Old 07-20-2014, 03:34 PM
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It sure looks like a delta gun to me. A lot is lost in translation. You can see it the picture. It would be neat to find one the us a tube Sony would be cool, but it would way 5 tons and would have to use o.e.m tubes from Sony.
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Old 07-20-2014, 06:48 PM
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Even if it's not a true Chromatron, a delta-gun Sony must be quite a rarity in itself.

Holy frig, 330 watts for a 19" set? That's quite the power suck.

Last edited by Jon A.; 07-20-2014 at 06:55 PM.
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Old 07-20-2014, 08:51 PM
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The convergence clover gives an indication of a delta gun, but notice the close-up of the tube face that shows the phosphor stripes.

There are two high voltage connections on the bell: take a close look at the photo that shows the rear of the tube, there is a high voltage lead on the left of the tube, and a smaller one on the right!

Last edited by colorfixer; 07-20-2014 at 08:55 PM.
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Old 07-20-2014, 08:57 PM
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So much for a CRT sub for one of those.
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Old 07-20-2014, 09:20 PM
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I remember seeing a Sony color set & BIG-@zz VCR on an audio-visual type roll-around cart-The metal kind schools used, prolly 1968-'69, but the TV was NOT a Trinitron... Looked more like a Zenith or RCA table model, was about 19-23" whatever they usually were. This was at Bondurant Bros. Co. in Knoxville, they were the Sony distributors for Knoxville & environs back then. I DON'T think Sony ever re-badged somebody else's sets, at least not in the "Consumer" line, but MAYBE they did in the A/V business... Anybody got any ideers ?!?
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Old 07-20-2014, 10:18 PM
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It's probably similar to the 7" Chromatron except that it has a delta gun instead of a Trinitron gun. In the 7", the color selection grid is powered by DC and serves basically as a lenticular lens to focus the beams on the appropriate color stripes. The advantage is that no electrons are wasted, but it's a lot more complicated to manufacture.
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Old 07-20-2014, 10:45 PM
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Notice the neck too, looks delta to me.
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Old 07-21-2014, 02:59 AM
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Not enough socket pins for triple gun?
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Old 07-21-2014, 11:14 AM
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Quote:
Originally Posted by Sandy G View Post
I remember seeing a Sony color set & BIG-@zz VCR on an audio-visual type roll-around cart-The metal kind schools used, prolly 1968-'69, but the TV was NOT a Trinitron... Looked more like a Zenith or RCA table model, was about 19-23" whatever they usually were. This was at Bondurant Bros. Co. in Knoxville, they were the Sony distributors for Knoxville & environs back then. I DON'T think Sony ever re-badged somebody else's sets, at least not in the "Consumer" line, but MAYBE they did in the A/V business... Anybody got any ideers ?!?
I the early days of B/W, R-R Sony VTR's, Sony had Motorola build a 23" B/W monitor with the input connector for their VTR.
That was in the mid-60's.
The set was badged "Sony", but it was obviously a Motorola.
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Old 07-21-2014, 01:53 PM
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Quote:
Originally Posted by NewVista View Post
Not enough socket pins for triple gun?
More wires visible here, and an unusual horizontally-mounted convergence panel up top.

I just realized, this is the first color CRT I've seen with the 2nd anode connector on the side, and the first from this era I've seen that lacks an external degaussing shield.

Last edited by Jon A.; 09-29-2015 at 05:05 PM.
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Old 07-21-2014, 07:27 PM
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The anode button on the right everyone is talking about does not look right to me its hard to tell but it just don't look right.
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