SI-327 Hula Problem.

[dabone]

I've got a monitor that I was originally told was a kortek but upon research it turn out I have a SI327 with a 25" tube.

The manual matches exactly for board layout and component
 list.

My problem is that the screen is doing the hula.

Here are the things I've done to the monitor.

When I got it, no high voltage..

Replaced HOT, then replaced resistor R610 because it was open.
Got High voltage after that, then installed a cap kit.

Monitor was missing its horz width coil, so I used one from a g07.

Replaced main powersupply filter cap at c604 with no change.
Also re-replaced c607 and c608.

The B+ Voltage is at 127 volts and the b+ adjust pot does nothing.

Help..

Please...




Later,
dabone

[Ken Layton]

Horizontal width coils are like flybacks----they are made for a particular make & model of monitor only and are not generally interchangeable.

If the B+ won't regulate you have a problem in the B+ power supply section.

[dabone]

Finally fixed it, It was a q601 was shorted in the powersupply, the strange thing is that even with this large src blown the powersupply was still kinda working.. (Giving 127V instead of 115V.)

Fixed the powersupply and the hula went away.


Thanks for the help..

Btw.. the g07 width coil worked perfectly on this one... Dunno why but it did.

Later,
dabone

[Jomac]

dabone , do you have any pics of this chassis ?? also what is the Brand and part number on the CRT ?

[dabone]

I'll snap a pic tomorrow, but it looks just like this one off your site.


Kortek
 
26" 110v Note: black HT Lead

Flyback ETF46L10AY
 


http://www.jomac.net.au/images/Chassis/img88.gif


I'll see if I can read a number off the flyback tomorrow also.

It has a high impedance yolk on a 25" tube.

When I saw that pic on your site I went a got the manual for a si-327 and the manual matched this chassis about 99.9% (It has a couple of extra resistors in the power supply).

I had been told this monitor was a betson imperial 4050 and a Kortek.
I sent the chassis to Betson for repair but they sent it back to me stating that they could no longer service it.
(NO Parts).

So I threw it on the shelf for a few months until I had the urge to play with it again. I don't have anything to put it in, but I'm happy I got it to work.(It's just the principal of the thing, having something that nearly works just sitting there taunting you)

Later,
dabone

[Jomac]

Thanks dabone ,
Kortek , Seejoo Corporation made the chassis and were rebadged as many different models by Sharp Image , Orion , TE and various others , I dont know of the SI-327 you mention ??

I do have the original manufactures Schematic from Seejoo corp here and like most of the models they made were left unbadged so that companies put put their own name on them , Although this one was made under contract from Kortek and was badged only as KTX-26" , Your CRT should either be RCA or Zenith starting with A63....
If it was a 25" the CRT would start with A59... and the flyback would have a Red HT lead

In your chassis , C604 should have been 680uf 200v and Q601 is a 2CS3306 , if you want the proper schematic I will scan it for you.
As for parts I have at least 70 of those chassis , most working , some aqs spares .

[dabone]

The tube is a Zenith G-A63ADG25X and the flyback is a
ETF 46L10AY.

Black High Voltage lead but a 25" tube.

I'm really beginning to detest trying to find info on asian monitors.


(Just fixed a Hitachi 27" with Kens help)


Later,
dabone

[Jomac]

That is exactly the one I am talking about and is pictured on my site , A63 = 26"
For some reason the asian countries CRT's sizes are not measured the way they label them

In the Seejoo manual , all CRT's starting with the part number A59 = 25" and A63 = 26"
We know that is not correct for the way the rest of the world rated their CRT's as A67 = 26" in the US and other countries.
We know also that TV's sold as 68cm or A68 were marketed as 29" inch , exactly the same as the Toshiba CRT's used in Jap daytona and sega rally , where in fact they are not 29" but only 27" by US standards. ,  thats why if you buy a 27" Wells gardner the CRT part number will start with A68 , but if you bought a 29" Nanao it would have the same CRT.

As a general rule though the first part of any CRT's part number is the actual size in CM as in 48cm = 19"   etc

BTW , that Kortek monitor you have is by far the most reliable 110v asian chassis I have ever come across ,also many of those zenith CRT's are over 10 years old and still going strong , Wish I could say the same for most of the WG's I see .
I have as much info on most of the Asian chassis as you will ever need , If I dont have the diagrams I know them inside out anyway.