Broken Atari SC1224

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2xAA
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Broken Atari SC1224

Post by 2xAA »

Another noob post by myself, but I'm seriously stuck.

I made a video because it's so much easier than explaining the problem, so here it is: http://youtu.be/F3sPhtqLlHw :P
BECAUSE I DIDN'T MENTION IN THE VIDEO - The power LED is NOT lighting.

If you know why this is so dead I'll send you a cookie through the post, and maybe a hug too.
I've had so much bad luck with monitors lately, my old Philips monitor was working fine, then one day last month it just packed up and broke - so I had to find a replacement.

Got an adapter cable for that Amstrad CTM and it didn't work, contacted the seller but they didn't reply so I had to resolder all the scart pins :/

Anyway, if you've got any insight on this - thank you so much :)
Last edited by 2xAA on Sun Sep 01, 2013 1:42 pm, edited 2 times in total.
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Zogging Hell
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Re: Broken Atari SC2114

Post by Zogging Hell »

Schematics are here..

http://atari4ever.free.fr/hardware/docs.html

I think (and correct me people if I'm wrong) that the insides of this monitor are the same as a Phillips Phillips 8833 mkII. So a service manual for that might be helpful. Not sure whether there is a service manual specifically for SC2114, but I'd be surprised if there isn't.....

.....However, if you are not comfortable with discharging the tube and the general voltages in that thing and don't want to get another one, your best option is taking it to your old school (CRT) TV repair man (maybe with the schematic).
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2xAA
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Re: Broken Atari SC2114

Post by 2xAA »

Zogging Hell wrote:I think (and correct me people if I'm wrong) that the insides of this monitor are the same as a Phillips Phillips 8833 mkII. So a service manual for that might be helpful. Not sure whether there is a service manual specifically for SC2114, but I'd be surprised if there isn't.....
Like I said, I'd already looked at the forums and found this manual: http://dev-docs.atariforge.org/files/SC ... l_CA-3.pdf :)

I'm gonna get some thick marigolds and open this up properly soon, take a look inside the power unit.
Everything inside looks completely fine (not sure about the power unit though, didn't open that up) so I'm guessing it's not transport damage.

There's one CRT repair man, who lives in Cornwall - not exactly close to me, but the closest I could find near me.
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Re: Broken Atari SC1224

Post by Guest »

i would open it up stand it on the front on a cloth or towel folder up to protect the crt
and eximine the internal pcb for cracking
and around other heavy objects like transformers

to be honest you prob need to replace most of the caps
but what i would do is take some macro mode hidef images then convert them to a resonable size and upload them here
i think the limit is ??300 or 500k images
the upload wizard will tell you

do it in daylight and no shadows

then i can help more

fixing cracks is quite easy but there are methods to stop them spreading like drilling a small hole at the end of the fisher thru the pcb not the trackings

you may need to demount the pcb chassis it may be in a metal case
ive never seen one of these monitors for repair so
its just like any other to me

so i would air on the side of caution and dont power it up till your
reasonably sure it will power up again
or you can do more damage
:(
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2xAA
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Re: Broken Atari SC1224

Post by 2xAA »

I tried my best with the photographs without dismounting anything.

Check them out here: http://junk.brkbrkbrk.com/sc1224/

This cap is located in the power segment - where the whine was coming from (click for a larger image):
Image
Seems like it needs a replacement.

Also, I've checked the fuse - that's fine.
The tube seems intact, the PCB looks free from cracking and all the caps (apart from the one I pointed out) look in good condition - I have no idea what's wrong with it.
I'll try to get better photographs as soon as I have a better light-source.
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Re: Broken Atari SC1224

Post by Silly_Pony »

If it's been bashed up I wouldn't bother.
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Re: Broken Atari SC1224

Post by 2xAA »

edit: never mind this post.
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Re: Broken Atari SC1224

Post by Guest »

ok the first photo i looked at was the CRT base neck this is damaged rendering the unit unusable

you would be better to advertise it as for parts etc and crt broken to recover a bit
or send it back to the guy who sent it without proper courier
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Re: Broken Atari SC1224

Post by Hippy Dave »

simbo2 wrote:ok the first photo i looked at was the CRT base neck this is damaged rendering the unit unusable

you would be better to advertise it as for parts etc and crt broken to recover a bit
or send it back to the guy who sent it without proper courier
I am not certain those are cracks. Please inspect closely with a magnifying glass.
Maybe it is glue or something harmless on the surface of the tube.

If the tube is ok, then replace the capacitors. Note that anything near
a heat source (power resistors and neck of tube are heaters) may be
damaged by the heat.

Don't make any adjustments before the unit is clean and functioning.
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Re: Broken Atari SC1224

Post by Guest »

come on you mad hippy :contract:

the tube base is blasted [smilie=greencolorz4_pdt_08.gif]
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Re: Broken Atari SC1224

Post by Guest »

you need to take the main pcb unit

from the monitor

and photo both sides

take it apart totally

the tube base does look ok

but a bad shock to a tube crt will move around its internal components screens and grids and the purity may never be the same

the tube can be short and all sorts
you can end up chasing a dead short tube

you need to check on power up what happens
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