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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Mon May 04, 2009 7:15 am Post subject: Sony 1270 powers up for 2 secs then turns off. |
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Hi
As the title states my 1270 will power up with fans but 2 secs later turns off.
Please has anyone got an idea why.
Thanks
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Brian Hampton
Joined: 22 Apr 2006
Posts: 1173
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| Posted: Mon May 04, 2009 11:02 am Post subject: |
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Does it show an error code?
I think there is a window in the back that should display a number when this happens.
-Brian
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Mon May 04, 2009 11:22 am Post subject: |
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Hi
Thanks for the reply
The 1270 does not have those error numbers.
It was working fine but the pic was not great so I decided to take of the lenses and do some cleaning and re adjusting.
I was centering the pic on the red tube and turned the Green and Blue tubes off when i noticed the Green was getting brighter and then it switched itself of, and i have not been able to turn it on again for more than 2 secs.
Please, is there a fuse or a board that i can change to get it working again.
All 7 fans are working so its not that.
Thanks
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Mon May 04, 2009 9:45 pm Post subject: |
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Anyone Out There that can help, Please
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ecrabb
Forum Moderator
Joined: 13 Mar 2006
Posts: 15909
Location: Utah
TV/Projector: JVC RS40, Epson 5010
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| Posted: Mon May 04, 2009 10:30 pm Post subject: |
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Bummer.
Curt's going to have to jump in here. If the green was getting brighter and brighter, it sounds like G2 was going wild. The projector is shutting down to prevent the tube from getting scorched. Don't keep trying to turn it on until somebody jumps in to help you diagnose and tells you what to do next.
SC
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perisoft
Joined: 29 Aug 2007
Posts: 2920
Location: Ithaca, NY
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| Posted: Mon May 04, 2009 10:45 pm Post subject: Re: Sony 1270 powers up for 2 secs then turns off. |
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| bigsilverdisc wrote: | Hi
As the title states my 1270 will power up with fans but 2 secs later turns off.
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I guess that rules out the LOTR movies, then... 
_________________
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Curt Palme
CRT Tech
Joined: 08 Mar 2006
Posts: 24396
Location: Langley, BC
TV/Projector: All of them!
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| Posted: Tue May 05, 2009 1:33 am Post subject: |
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I'm guessing that you bent a pin on one of the CRTs, assuming you took them out. Do you still get an image, or does the set shut off before you get any light out of hte tubes? Without the error LED, it's going to be very hard to troubleshoot this one, since I'm guessing it was a 'user created' problem rather than a failure on the set itself.
I always start by replacing the top two (D and E) boards, as that's where about 70% of the 12XX problems occur, but if you bent a pin/broke a wire/stressed something while working on the set, replacement of those boards won't do anything.
All I can suggest is to retrace your steps to see what's wrong. What weren't you happy about with your set? Maybe it's time to part it out and get something a bit higher end?
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Tue May 05, 2009 4:16 am Post subject: |
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| Curt Palme wrote: | I'm guessing that you bent a pin on one of the CRTs, assuming you took them out. Do you still get an image, or does the set shut off before you get any light out of hte tubes? Without the error LED, it's going to be very hard to troubleshoot this one, since I'm guessing it was a 'user created' problem rather than a failure on the set itself.
I always start by replacing the top two (D and E) boards, as that's where about 70% of the 12XX problems occur, but if you bent a pin/broke a wire/stressed something while working on the set, replacement of those boards won't do anything.
All I can suggest is to retrace your steps to see what's wrong. What weren't you happy about with your set? Maybe it's time to part it out and get something a bit higher end? |
Thanks for the reply
I do not get any Tube light at all it turns of to quick.
The problem I had with the 1270 was that the blacks of the picture was a washed out gray and i read of a procedure at another forum were you use a hd drive jumper to the CF2 board to disable the AKB.
I did this and it started up no worries I was centering the red raster and thought i better cut of the Green and Blue tubes of when the green slowly went bright and it shut itself off.
Could the man that owned it before me turned the G2 R G B screen controls up and by me disableing the AKB made the tubes dangerously bright and it went into protection mode.
Is this possible?
Thanks
PS.
There is a red led lighted up on the Y (i think) board
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Tue May 05, 2009 9:34 pm Post subject: |
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Is there anything else i should try?
I would hate to leave this broken, the tubes are 9.5/10
Please
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Tue May 05, 2009 11:25 pm Post subject: |
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Well at this point and assuming you have very limited electronic experience you only have a few options.....
1) Send your projector to Curt and have it fixed.
2) Send a bunch of boards to Curt and have them checked and repaired.
3) Locate another working projector and swap boards until it works again.
4) Buy another projector from Curt.
There is no one here or on the planet for that matter that can point you to the problem part. Even a tech, who knows what they are doing would have to do tests and try to search out the problem as it could be any number of areas that are causing the shut down. Without boards to swap and try, a tech would have to disable the protection circuits one at a time to find out just which section is causing the shut down. This is mostly because of no code read out but is sometimes also used even if a code was known. But disabling the safeties should only be done by someone who knows the consequences and take precautions when doing so.
I would suggest making this thread a sticky for what not to do with your projector, as in making modifications without experience. I mean no offense......these are just the facts....... 
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Wed May 06, 2009 5:18 am Post subject: |
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| macgyver655 wrote: | Well at this point and assuming you have very limited electronic experience you only have a few options.....
1) Send your projector to Curt and have it fixed.
2) Send a bunch of boards to Curt and have them checked and repaired.
3) Locate another working projector and swap boards until it works again.
4) Buy another projector from Curt.
There is no one here or on the planet for that matter that can point you to the problem part. Even a tech, who knows what they are doing would have to do tests and try to search out the problem as it could be any number of areas that are causing the shut down. Without boards to swap and try, a tech would have to disable the protection circuits one at a time to find out just which section is causing the shut down. This is mostly because of no code read out but is sometimes also used even if a code was known. But disabling the safeties should only be done by someone who knows the consequences and take precautions when doing so.
I would suggest making this thread a sticky for what not to do with your projector, as in making modifications without experience. I mean no offense......these are just the facts....... |
Thanks for your input
To answer those options
1. To far away, Im in Australia
2. Maybe If someone could suggest what boards are most likley to be the problem in my situation.
3. Maybe, but they are rarer to find in Aus.
4. Same as answer 1.
Also about what I tried There was a write up on that procedure at the other forum with washed out blacks on the 1270 and disabling the AKB.
I was not aware that disabling the AKB was like a fuse, I thought it was just an Auto tube adjusment, I have read alot of people disable it anyway, Well now I know.
About trying things without having a Degree well thats how you learn alot of the time by having a go and making mistakes to get experiance and I dont think everyone here that has ever tinkered with a CRT Is a tech, thats why this forum is perfect for us CRT fans to get together and discuss our Mods or Problems after all where else do you go CRT Tech is a dead display form anyway isnt it?.
Thanks
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tommo2
Joined: 03 Jun 2006
Posts: 226
Location: Ireland
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| Posted: Wed May 06, 2009 9:57 am Post subject: |
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Ok, maybe try undoing exactly what mods you made.
I know it was working for a while after that, but if you tinkered with it and now it is not working, then undo your changes, check for any loose connections etc. You may have disturbed something.
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Wed May 06, 2009 10:06 am Post subject: |
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Hi
All i did was disable the AKB and I did reverse that.
Thanks
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Thu May 07, 2009 7:51 am Post subject: |
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Thanks for all the help so far.
I was doing some more tinkering and i found that if i disconect the orange connecter wires from the CF-2 board then the projector turns on and stays on but the tubes dont light, does this mean it is the CF-2 board that needs replacing or have i at least narrowed it down a bit to where I should look next.
The green tube does have a glow and the red blinks when i turn it off the unit off.
Cheers
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu May 07, 2009 1:22 pm Post subject: |
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| bigsilverdisc wrote: | Thanks for all the help so far.
I was doing some more tinkering and i found that if i disconect the orange connecter wires from the CF-2 board then the projector turns on and stays on but the tubes dont light, does this mean it is the CF-2 board that needs replacing or have i at least narrowed it down a bit to where I should look next.
The green tube does have a glow and the red blinks when i turn it off the unit off.
Cheers |
CF-2 is the power filter board for the video boards. Which connector are you pulling? CF2-1 or CF2-2? It should be stamped on the board.
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Brian Hampton
Joined: 22 Apr 2006
Posts: 1173
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| Posted: Thu May 07, 2009 4:43 pm Post subject: |
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I often had AKB dis-abled on my 1271.
Most of the time I had it dis-abled.
Just sayin.
-brian
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Thu May 07, 2009 9:28 pm Post subject: |
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Hi
The CF-2 board only has one orange connector connected to the CF2-2.
Thanks
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Thu May 07, 2009 10:05 pm Post subject: |
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| bigsilverdisc wrote: | Hi
The CF-2 board only has one orange connector connected to the CF2-2.
Thanks |
The schematic doesn't give me a color, just a number. That's why I asked. Will it still run if you reconnect that connector and disconnect CF2-1? I'm thinking it will but if you want some help trying to find the problem then humor me... 
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bigsilverdisc
Joined: 19 May 2007
Posts: 60
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| Posted: Fri May 08, 2009 1:20 am Post subject: |
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Thanks
The 1270 only has one cable conneted to it, the cf2-2 the cf2-3 only has 2 pins that can take a hard drive jumper, thats the AKB disable.
If I connect the cf2-2 back it turns off in 2 secs.
Is Curt reading this, Would it be the CF-2 board? am I getting closer to where the prob might be?
cheers
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri May 08, 2009 2:16 am Post subject: |
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If you want Curts help then I'll drop out.........
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