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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Fri Sep 04, 2009 9:57 pm Post subject: |
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yes, 5 wire output from HD Fury through the gamma-x, which seems to be necessary for sync.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri Sep 04, 2009 10:47 pm Post subject: |
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Is there a setting in the projector menu for what type of input is being used for input 5?
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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Fri Sep 04, 2009 10:53 pm Post subject: |
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I don't know of a setting on the menu to select the type of input on port 5. If there is I haven't seen it.
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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: Fri Sep 04, 2009 11:44 pm Post subject: |
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| macgyver655 wrote: |
Curt, I think your forgetting that he has internal test patterns on all 3 tubes. Broken cables cannot be the problem or he wouldn't have patterns either. |
No, this time I read the question. 
The cables connect the BNC inputs on the back of the set to the video board. If those break, you get no signal, but the internal test patterns will be fine.
Try running a video or Svideo signal to the set, if all colors are OK, it will be the RGB switcher board or the video cables that I described.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Fri Sep 04, 2009 11:53 pm Post subject: |
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| Curt Palme wrote: | | macgyver655 wrote: |
Curt, I think your forgetting that he has internal test patterns on all 3 tubes. Broken cables cannot be the problem or he wouldn't have patterns either. |
No, this time I read the question.
The cables connect the BNC inputs on the back of the set to the video board. If those break, you get no signal, but the internal test patterns will be fine.
Try running a video or Svideo signal to the set, if all colors are OK, it will be the RGB switcher board or the video cables that I described. |
Ah yes. I was thinking the cables from the switcher to the driver boards. Forgot about those other cables... 
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Sep 05, 2009 2:33 am Post subject: |
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If you cycle between input 4 and 5 on the remote, do you notice any difference in the tube output?
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Sep 05, 2009 2:35 am Post subject: |
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| Curt Palme wrote: | It could be the switcher board, but the 1208s have a unique problem of the shielded cables snapping under the motherboard where they connect to the module connectors of the RGB switcher board. Luckily, taking the bottom case part off the set isn't too bad, but the set does have to come off the ceiling. I just sold a 1209s where that happened between here and Florida.
THere are 6 large bolts inside the set that hold the case bottom to the chassis. One is located about midway under the R and B tubes. Two are outside the tube/lens area on the outside of the chassis frame, but within the case bottom, and the other two are under the AC input module and the H shift/focus board. THey are large 8mm hex bolts.
Pull those out, then flip the set over. There are between one and three slot screws in the keypad area that screw the keypad to the case bottom. Remove those. REmove the convergence tray.
That should allow the case bottom to come off completely.
Look at the center conductor of all shielded cables running from the BNC input connectors to the video boards. I'll bet one has snapped, and the centre wire isn't connected. Carefully strip the remaining wire back, and resolder.
Done. |
Curt. Wouldn't it be easier to just do a continuity test to check for cable breakage rather then rip it apart? 
Just askin.......
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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: Sat Sep 05, 2009 2:38 am Post subject: |
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That ruins the fun, doesn't it? 
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Sep 05, 2009 2:41 am Post subject: |
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| Curt Palme wrote: | | That ruins the fun, doesn't it? |
Thats true. I just love rippin things apart as you do too........ 
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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Sat Sep 05, 2009 3:41 am Post subject: |
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Toggling between 4 & 5: 4 shows nothing, everything goes black. 5 turns on the CRTs but only green has video. I like the idea of the continuity checks over disassembly. I'd have to get a few of my neighbors to help me get the thing down from the ceiling.
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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Sat Sep 05, 2009 6:42 pm Post subject: |
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S-Video on port 2 shows red, green, and blue video. But port 5 still only shows green. Where would be the best place to perform the continuity checks to eliminate the possibility of the broken shielded cables?
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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: Sat Sep 05, 2009 6:51 pm Post subject: |
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I'd have to pull the manual sometime next week to see what pins the video signals go to.
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macgyver655
Joined: 22 Aug 2007
Posts: 8508
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| Posted: Sat Sep 05, 2009 7:24 pm Post subject: |
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| wellborn2001 wrote: | | S-Video on port 2 shows red, green, and blue video. But port 5 still only shows green. Where would be the best place to perform the continuity checks to eliminate the possibility of the broken shielded cables? |
I've got the info for ya. On the mother board for the input/switcher card, connector J6A (J61 on the switcher board), C1 is for Blue, C5 is for Green and C13 is for the red.Happy hunting,,,,,,
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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Sat Sep 05, 2009 10:42 pm Post subject: |
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Thanks, macgyver655.
I'll check it out.
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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Sun Sep 06, 2009 1:14 am Post subject: |
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OK, continuity checks good for all 3 signals to the switcher board. So based on all the above, should I send the RGB switcher board in for repair? Or could it still be something else?
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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: Sun Sep 06, 2009 3:14 am Post subject: |
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If that's the case, then I'd say yes, it's the switcher board.
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wellborn2001
Joined: 13 Feb 2009
Posts: 35
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| Posted: Sun Sep 06, 2009 2:28 pm Post subject: |
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Man, talk about spoiled! My wife and I are having to watch movies on our "dinky" 43" TV in the family room. Oh, the hardship. Can't wait to get the projector fixed!
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