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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Mon Dec 20, 2021 6:27 pm Post subject: (help) barco 808s not starting |
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hi
I’m brand new to the world of crt projectors. i recently purchased my first projector, the barcographics (or retrographics?) 808s. when i tried to turn it on the high frequency sound starts normally but then stops and start again and again. the picture also flickers on and off. i am kinda scared that this will break something so i turned it back off.
video of what’s going on https://1drv.ms/v/s!AszjmP5e2jJigYBJMvgS8ag75WSTjQ?e=noio2Y
i opened it up to see if there was something obvious and i noticed this red led flickers in sync with the picture https://1drv.ms/u/s!AszjmP5e2jJigYBKGjutjBvflnawVg?e=anfkGY
any help would be appreciated!
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 7:32 am Post subject: |
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hi kal, thanks for replying!
in the video i didn’t have a video source attached. i thought i could access a menu or something. however, if i connect my ps2 via RGB-Scart (using a component to RGB transcoder and using scart to bnc cables (i know kinda janky but it works)) i get the same results. could it be something with the power supply? sometimes it fails completely and turns completely off and on again. sometimes it fails 3 times and then it stops trying until i press the standby button again.
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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Link Posted: Tue Dec 21, 2021 1:16 pm Post subject: |
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lolkalberer wrote: | in the video i didn’t have a video source attached. i thought i could access a menu or something. |
Yes you can. You don't need a source to enter the menus. Hit the ADJ button on the remote to access the menus. At least I think it's the ADJ button. It's been more than 10 years since I owned a 808s projector.
Quote: | however, if i connect my ps2 via RGB-Scart (using a component to RGB transcoder and using scart to bnc cables (i know kinda janky but it works)) i get the same results. |
How exactly is it connected? How many wires and which wires are connected to the 808s? You'll need at least RGBS if not RGBHV.
What resolution/refresh rate are you using?
Barcos tend to have special sync requirements. Many require negative sync.
If you want to make sure things are working ok, pull up the internal menus to start. You can then also just hook up a composite signal (1 cable) or S-video to make sure things are working ok.
Quote: | sometimes it fails completely and turns completely off and on again. sometimes it fails 3 times and then it stops trying until i press the standby button again. |
The entire projector turns off completely? If that's the case then yes, something is not right with the projector.
It could be any number of issues that force it to shut down. Take a look here:
http://www.curtpalme.com/Troubleshooting_Tips_Barco1.shtm
Kal
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Last edited by kal on Tue Dec 21, 2021 1:57 pm; edited 1 time in total
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 1:55 pm Post subject: |
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i believe in the video it is trying to display a menu. i tried again pressing the adj button and i get the same results. if i press it again it goes black but i can still hear the high frequency sound being inconsistent. so, it’s trying to display a menu (when it hit the adj button) but it’s very wobbly and it keeps flashing on and off.
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projektor trying to display a menu |
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 2:23 pm Post subject: |
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sorry that i didn’t answer the other questions!
the ps2 is connected via Scart which uses RGBS. the resolution is 480i @50 hz. It works on other CRTs and even on a sony superdata crt projector.
the projector sometimes shuts off. every time this happened there wasn’t even a white screen. it started, the high frequency sound goes crazy, turns off and starts again. it does this 3 times before it gives up.
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 3:19 pm Post subject: |
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the power cable and the video connector from the ps2: red, green, blue and sync. im not sure what type of sync.
Edit: checked the Comp2RGB manual. it outputs 1V CSYNC, 75 ohms on SCART
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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Link Posted: Tue Dec 21, 2021 3:26 pm Post subject: |
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If there's only one sync cable (R/G/B + sync) it's combined sync (H+V) if I remember correctly. Not sure which input (H or V?) you're supposed to hook up a combined sync signal to . This is referred to as 'RGBs' or RGB with composite sync.
You can also do sync on green (only R/G/B cables and sync is included on the green).
To make matters more complex Barcos can be a lot more finicky about sync. Sometimes needing negative sync instead of positive. There's also a sync speed option in the menu (fast or slow).
This is why I recommend going very simple at first: Hook it up to composite or S-video. One cable. Get that working first. The read the manual/scour posts here about using RGBS on a Barco 808s. Manuals are here: http://www.curtpalme.com/Barco808_Downloads.shtm
The projector shutting down on its own is not normal (I think). It's shutting down due to a failure. This is a whole other issue that would need to be resolved.
Sorry, been a long time since I've used a CRT projector... but I was mostly familiar with Barco using 5 wires (RGBHV). I don't have any SCART experience. Just composite, S-Video, and RGBHV. Others can chime in too of course.
Kal
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My basement/HT/bar/brewery build 2.0
Last edited by kal on Tue Dec 21, 2021 3:35 pm; edited 1 time in total
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 3:33 pm Post subject: |
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could something else be the issue? i can’t even get to the menu because it flickers nonstop. also, the mentioned power cycles lead me to think that it could be something else. i will still try to hook something via composite to check if that helps.
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 3:46 pm Post subject: |
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just did that and no succes. there is no picture at all. i hooked up my ps2 via composite.
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 4:08 pm Post subject: |
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"set is pulsing" sounds like nearst to whats happening. ill follow the troubelshooting method and report back.
the set was bought as working, though the seller said the last time he powerd it up was a long time ago. he said its basicly new since he never really used it.
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kal Forum Administrator
Joined: 06 Mar 2006 Posts: 17850 Location: Ottawa, Canada
TV/Projector: JVC DLA-NZ7
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 5:05 pm Post subject: |
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so, i tried it out but i don’t believe that’s the problem. it starts up with or without a missing card. however, i have noticed that the weird inconsistent high frequency sounds stop when I’m changing inputs. so, if it doesn’t have to display a picture, it sounds normal. that’s why i think it has something to do with the Sync+Vertical Deflection Module. the red led on it flickers in sync with the picture and high frequency sound (when I’m trying to display the menu). but mainly when changing inputs, when the card is presumed not in use, that’s when the inconsistent high frequency sounds stop acting up and it sounds like a normal crt until the input is changed.
is there any way to check if the Sync+Vertical Deflection Module is working properly?
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24296 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Tue Dec 21, 2021 5:08 pm Post subject: |
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Disconnect all inputs, and fire the set up. You should get the onscreen menus and test patterns clearly. If not, and it's still similar to the picture you posted above, then it could be:
-H board
-V board
-controller board
-power supply
-RGB switcher board.
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lolkalberer
Joined: 19 Dec 2021 Posts: 19
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Link Posted: Tue Dec 21, 2021 5:12 pm Post subject: |
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with everything disconnected i get the picture that i posted above. do i have to presume that all the components you listed are broken or is there a way to find out which one it is?
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Curt Palme CRT Tech
Joined: 08 Mar 2006 Posts: 24296 Location: Langley, BC
TV/Projector: All of them!
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Link Posted: Tue Dec 21, 2021 5:18 pm Post subject: |
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At this point you have to do board swaps, as this is a problem I've never seen before. I will have some of the boards if you need them, but I am almost out of 808s parts.
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