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  #1  
Old 04-21-2012, 07:50 PM
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cwmoser cwmoser is offline
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Is it a 19" CRT - 19AP4 ?

Here is the Zenith Service Manual - scroll to the bottom:
http://www.earlytelevision.org/tv_sc..._diagrams.html

I have the "Bryon" 24H21 Chassis porthole TV - no doors but the bezel looks exactly like yours.

Looks like your Power Supply is not in the proper position.

They are indeed very collectible and nice TVs.

Carl
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1950 Zenith Porthole - "Lincoln"
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Old 04-21-2012, 07:55 PM
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It's a 19in, not sure about the CRT number. Where do you find it? When you say the power supply is not in the right position where should it be?
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Old 04-21-2012, 08:02 PM
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cwmoser cwmoser is offline
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Quote:
Originally Posted by ShartZenith View Post
It's a 19in, not sure about the CRT number. Where do you find it? When you say the power supply is not in the right position where should it be?
The Zenith service manual shows it as a 19".
Look inside your cabinet for a sticker.
The CRT number should be there.

Here are my websites that shows where the Power Supply should be mounted:
http://www.cerant.com/ZenithPorthole...ortholeTV.html

http://www.cerant.com/ZenithTV-24H21/index.html

Carl
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1950 Zenith Porthole - "Lincoln"

Last edited by cwmoser; 04-21-2012 at 08:10 PM.
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Old 04-21-2012, 08:49 PM
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19ap4a
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Old 04-21-2012, 08:56 PM
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CW, after looking at the pics in your links I see what you're talking about re: the power supply mounting place. The only thing is, on the lower part of my cabinet there is obviously provisions for mounting the power supply because there are two little female inserts. one on each side of the cabinet. Yet there is no evidence anything was ever mounted in that position, there is no wood shelf or evidence of one being mounted there in the past. Also, when I view the mounting for where the power supply is now it appears to be a factory mount just like the main chassis complete with the same type of screws and screen material for venting.

Last edited by ShartZenith; 04-21-2012 at 09:04 PM.
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Old 04-21-2012, 09:33 PM
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Two more pics, PS mounting

Here is a photo of the bottom (non-existent) shelf and one of the inserts where a chassis could be mounted (or a shelf?) and the bottom of the upper shelf where the power supply chassis is now mounted. Looks like a factory mount to me, no?
Attached Images
File Type: jpg IMG_4232.jpg (45.9 KB, 18 views)
File Type: jpg IMG_4233.jpg (109.7 KB, 27 views)
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  #7  
Old 04-21-2012, 10:40 PM
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John Marinello John Marinello is offline
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The power supply is in the correct spot.
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  #8  
Old 04-21-2012, 11:36 PM
tvdude1 tvdude1 is offline
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The crt should be a 19AP4
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  #9  
Old 04-22-2012, 06:30 AM
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cwmoser cwmoser is offline
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Quote:
Originally Posted by ShartZenith View Post
CW, after looking at the pics in your links I see what you're talking about re: the power supply mounting place. The only thing is, on the lower part of my cabinet there is obviously provisions for mounting the power supply because there are two little female inserts. one on each side of the cabinet. Yet there is no evidence anything was ever mounted in that position, there is no wood shelf or evidence of one being mounted there in the past. Also, when I view the mounting for where the power supply is now it appears to be a factory mount just like the main chassis complete with the same type of screws and screen material for venting.
Never seen one mounted like yours. John indicates that yours is correctly mounted. I learn something every day.

My two portholes do not have that smaller screened vent like you show in your photo.
Perhaps your TV is a later production run where Zenith engineers put in product improvements.

How about posting some more images of your power supply? I find it interesting.

Also, when you look up under the main chassis, can you tell if its been recapped?

Thanks

Carl
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1950 Zenith Porthole - "Lincoln"

Last edited by cwmoser; 04-22-2012 at 06:41 AM.
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  #10  
Old 04-22-2012, 04:30 PM
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Images of power supply.

Here are some images of the power supply as requested.
Attached Images
File Type: jpg IMG_4251.jpg (80.9 KB, 14 views)
File Type: jpg IMG_4252.jpg (63.1 KB, 14 views)
File Type: jpg IMG_4253.jpg (78.4 KB, 10 views)
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  #11  
Old 04-22-2012, 05:04 PM
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cwmoser cwmoser is offline
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You've got a very nice and desirable Porthole.
Are you going to recap it?

Carl
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